int itr(long int n)
{
char s[MAX]; int counter = 0 ;
while(n!=4)(memset(s,'\0',MAX),n2s(n,s),printf("number:%ld, String format : %s , new Number = %ld\n",n,s,strlen(s)),n = strlen(s),counter++);
return counter;
}
void numToChar(long int n , char s[])
{
if(n == 0) sc(s,db[0]); else while(n != 0)(n >= 0 && n <= 19)?(sc(s,db[n]),(n >9) ? (n = n/100) :(n = n /10)):(n >=20 && n <= 99)?(n%10 == 0 )?(sc(s,tens[n/10-2]),n = n /100):(sc(s,tens[n/10-2]),sc(s,db[n%10]),n = n /100 ):((n >= 100 && n <=999)?(n%100 == 0 )?(sc(s,db[n/100]),sc(s,"hundred"),n = n/1000 ):(sc(s,db[n/100]),sc(s,"hundred"),n = n %100 ):((n >= 1000 && n <=99999)?(n % 1000 == 0)?(n2s(n/1000,s),sc(s,"thousand"),n = n/100000):(n2s(n/1000,s),sc(s,"thousand"),n = n%1000):((n >= 100000 && n <= 9999999)?(n%100000 == 0)?(n2s(n/100000,s),sc(s,"lakh"),n = n/10000000):(n2s(n/100000,s),sc(s,"lakh"),n = n%100000):((n >=10000000)?(n % 10000000 == 0)?(n2s(n/10000000,s),sc(s,"crore"),n = n/1000000000):(n2s(n/10000000,s),sc(s,"crore"),n = n%10000000):1))));
}
int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
{
unsigned short type;
unsigned short size;
unsigned short len;
unsigned char *data = *p;
s->servername_done = 0;
s->tlsext_status_type = -1;
if (data >= (d+n-2))
return 1;
n2s(data,len);
if (data > (d+n-len))
return 1;
while (data <= (d+n-4))
{
n2s(data,type);
n2s(data,size);
if (data+size > (d+n))
return 1;
if (s->tlsext_debug_cb)
s->tlsext_debug_cb(s, 0, type, data, size,
s->tlsext_debug_arg);
/* The servername extension is treated as follows:
- Only the hostname type is supported with a maximum length of 255.
- The servername is rejected if too long or if it contains zeros,
in which case an fatal alert is generated.
- The servername field is maintained together with the session cache.
- When a session is resumed, the servername call back invoked in order
to allow the application to position itself to the right context.
- The servername is acknowledged if it is new for a session or when
it is identical to a previously used for the same session.
Applications can control the behaviour. They can at any time
set a 'desirable' servername for a new SSL object. This can be the
case for example with HTTPS when a Host: header field is received and
a renegotiation is requested. In this case, a possible servername
presented in the new client hello is only acknowledged if it matches
the value of the Host: field.
- Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
if they provide for changing an explicit servername context for the session,
i.e. when the session has been established with a servername extension.
- On session reconnect, the servername extension may be absent.
*/
if (type == TLSEXT_TYPE_server_name)
{
unsigned char *sdata;
int servname_type;
int dsize;
if (size < 2)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
n2s(data,dsize);
size -= 2;
if (dsize > size )
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
sdata = data;
while (dsize > 3)
{
servname_type = *(sdata++);
n2s(sdata,len);
dsize -= 3;
if (len > dsize)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (s->servername_done == 0)
switch (servname_type)
{
case TLSEXT_NAMETYPE_host_name:
if (s->session->tlsext_hostname == NULL)
{
if (len > TLSEXT_MAXLEN_host_name ||
((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL))
{
*al = TLS1_AD_UNRECOGNIZED_NAME;
return 0;
}
memcpy(s->session->tlsext_hostname, sdata, len);
s->session->tlsext_hostname[len]='\0';
if (strlen(s->session->tlsext_hostname) != len) {
OPENSSL_free(s->session->tlsext_hostname);
s->session->tlsext_hostname = NULL;
*al = TLS1_AD_UNRECOGNIZED_NAME;
return 0;
}
s->servername_done = 1;
}
else
s->servername_done = strlen(s->session->tlsext_hostname) == len
&& strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
break;
default:
break;
}
dsize -= len;
}
if (dsize != 0)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
}
else if (type == TLSEXT_TYPE_status_request
&& s->ctx->tlsext_status_cb)
{
if (size < 5)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
s->tlsext_status_type = *data++;
size--;
if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
{
const unsigned char *sdata;
int dsize;
/* Read in responder_id_list */
n2s(data,dsize);
size -= 2;
if (dsize > size )
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
while (dsize > 0)
{
OCSP_RESPID *id;
int idsize;
if (dsize < 4)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
n2s(data, idsize);
dsize -= 2 + idsize;
if (dsize < 0)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
sdata = data;
data += idsize;
id = d2i_OCSP_RESPID(NULL,
&sdata, idsize);
if (!id)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (data != sdata)
{
OCSP_RESPID_free(id);
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (!s->tlsext_ocsp_ids
&& !(s->tlsext_ocsp_ids =
sk_OCSP_RESPID_new_null()))
{
OCSP_RESPID_free(id);
*al = SSL_AD_INTERNAL_ERROR;
return 0;
}
if (!sk_OCSP_RESPID_push(
s->tlsext_ocsp_ids, id))
{
OCSP_RESPID_free(id);
*al = SSL_AD_INTERNAL_ERROR;
return 0;
}
}
/* Read in request_extensions */
n2s(data,dsize);
size -= 2;
if (dsize > size)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
sdata = data;
if (dsize > 0)
{
s->tlsext_ocsp_exts =
d2i_X509_EXTENSIONS(NULL,
&sdata, dsize);
if (!s->tlsext_ocsp_exts
|| (data + dsize != sdata))
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
}
}
/* We don't know what to do with any other type
* so ignore it.
*/
else
s->tlsext_status_type = -1;
}
/* session ticket processed earlier */
data+=size;
}
*p = data;
return 1;
}
int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
{
unsigned short type;
unsigned short size;
unsigned short len;
unsigned char *data = *p;
int tlsext_servername = 0;
if (data >= (d+n-2))
return 1;
n2s(data,len);
while(data <= (d+n-4))
{
n2s(data,type);
n2s(data,size);
if (data+size > (d+n))
return 1;
if (s->tlsext_debug_cb)
s->tlsext_debug_cb(s, 1, type, data, size,
s->tlsext_debug_arg);
if (type == TLSEXT_TYPE_server_name)
{
if (s->tlsext_hostname == NULL || size > 0)
{
*al = TLS1_AD_UNRECOGNIZED_NAME;
return 0;
}
tlsext_servername = 1;
}
else if (type == TLSEXT_TYPE_session_ticket)
{
if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
|| (size > 0))
{
*al = TLS1_AD_UNSUPPORTED_EXTENSION;
return 0;
}
s->tlsext_ticket_expected = 1;
}
else if (type == TLSEXT_TYPE_status_request)
{
/* MUST be empty and only sent if we've requested
* a status request message.
*/
if ((s->tlsext_status_type == -1) || (size > 0))
{
*al = TLS1_AD_UNSUPPORTED_EXTENSION;
return 0;
}
/* Set flag to expect CertificateStatus message */
s->tlsext_status_expected = 1;
}
data+=size;
}
if (data != d+n)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (!s->hit && tlsext_servername == 1)
{
if (s->tlsext_hostname)
{
if (s->session->tlsext_hostname == NULL)
{
s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
if (!s->session->tlsext_hostname)
{
*al = SSL_AD_UNRECOGNIZED_NAME;
return 0;
}
}
else
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
}
}
*p = data;
return 1;
}
unsigned char *set_zstatus(mstr *src, int arg, unsigned char **ctxtp, boolean_t need_rtsloc)
{
unsigned char *b_line; /* beginning of line (used to restart line) */
mval val; /* pointer to dollar_zstatus */
unsigned char zstatus_buff[2*OUT_BUFF_SIZE];
unsigned char *zstatus_bptr, *zstatus_iter;
int save_arg;
size_t util_len ;
mval *status_loc;
boolean_t trans_frame;
DCL_THREADGBL_ACCESS;
SETUP_THREADGBL_ACCESS;
b_line = 0;
if (!need_rtsloc)
trans_frame = FALSE;
else
{ /* get the line address of the last "known" MUMPS code that was executed. MUMPS
* indirection consitutes MUMPS code that is "unknown" is the sense that there is no
* line address for it.
*/
trans_frame = !(SFT_DM & frame_pointer->type) && ((!(frame_pointer->type & SFT_COUNT
|| 0 == frame_pointer->type)) || (SFT_ZINTR & frame_pointer->type));
if (trans_frame)
{
save_arg = arg;
SET_ERR_CODE(frame_pointer, arg);
}
src->len = INTCAST(get_symb_line((unsigned char*)src->addr, &b_line, ctxtp) - (unsigned char*)src->addr);
}
MV_FORCE_MVAL(&val, arg);
n2s(&val);
memcpy(zstatus_buff, val.str.addr, val.str.len);
zstatus_bptr = zstatus_buff + val.str.len;
*zstatus_bptr++ = ',';
if (0 != b_line)
{
memcpy(zstatus_bptr, src->addr, src->len);
zstatus_bptr += src->len;
*zstatus_bptr++ = ',';
}
zstatus_iter = zstatus_bptr;
util_len = TREF(util_outptr) - TREF(util_outbuff_ptr);
if (trans_frame)
{ /* currently no inserted message (arg) needs arguments. The following code needs
* to be changed if any new parametered message is added.
*/
*(TREF(util_outbuff_ptr)) = '-';
memcpy(&zstatus_buff[OUT_BUFF_SIZE], TREF(util_outbuff_ptr), util_len); /* save original message */
util_out_print(NULL, RESET); /* clear any pending msgs and reset util_out_buff */
gtm_putmsg_noflush(VARLSTCNT(1) arg);
memcpy(zstatus_bptr, TREF(util_outbuff_ptr), TREF(util_outptr) - TREF(util_outbuff_ptr));
zstatus_bptr += (TREF(util_outptr) - TREF(util_outbuff_ptr));
*zstatus_bptr++ = ',';
memcpy(zstatus_bptr, &zstatus_buff[OUT_BUFF_SIZE], util_len);
/* restore original message into util_outbuf */
memcpy(TREF(util_outbuff_ptr), &zstatus_buff[OUT_BUFF_SIZE], util_len);
*(TREF(util_outbuff_ptr)) = '%';
TREF(util_outptr) = TREF(util_outbuff_ptr) + util_len;
arg = save_arg;
} else
memcpy(zstatus_bptr, TREF(util_outbuff_ptr), util_len);
zstatus_bptr += util_len;
for (; zstatus_iter < zstatus_bptr; zstatus_iter++)
{
if ('\n' == *zstatus_iter)
*zstatus_iter = ',';
}
status_loc = (NULL == zyerr_frame) ? &dollar_zstatus : &dollar_zerror;
status_loc->str.len = INTCAST(zstatus_bptr - zstatus_buff);
status_loc->str.addr = (char *)zstatus_buff;
s2pool(&status_loc->str);
status_loc->mvtype = MV_STR;
/* If this is a MEMORY issue, setting the ecode is of dubious worth since we are not going
* to drive any handlers and it can definitely be expensive in terms of memory use as ecode_add()
* (further down the pike) is likely to load the text of the module into storage if it can. So we bypass
* ecode setting for these two fatal errors. 02/2008 se
*/
if (ERR_MEMORY != arg)
ecode_set(arg);
return (b_line);
}
SCT *o2i_SCT(SCT **psct, const unsigned char **in, size_t len)
{
SCT *sct = NULL;
const unsigned char *p;
if (len == 0 || len > MAX_SCT_SIZE) {
CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
goto err;
}
if ((sct = SCT_new()) == NULL)
goto err;
p = *in;
sct->version = *p;
if (sct->version == SCT_VERSION_V1) {
int sig_len;
size_t len2;
/*-
* Fixed-length header:
* struct {
* Version sct_version; (1 byte)
* log_id id; (32 bytes)
* uint64 timestamp; (8 bytes)
* CtExtensions extensions; (2 bytes + ?)
* }
*/
if (len < 43) {
CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
goto err;
}
len -= 43;
p++;
sct->log_id = BUF_memdup(p, CT_V1_HASHLEN);
if (sct->log_id == NULL)
goto err;
sct->log_id_len = CT_V1_HASHLEN;
p += CT_V1_HASHLEN;
n2l8(p, sct->timestamp);
n2s(p, len2);
if (len < len2) {
CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
goto err;
}
if (len2 > 0) {
sct->ext = BUF_memdup(p, len2);
if (sct->ext == NULL)
goto err;
}
sct->ext_len = len2;
p += len2;
len -= len2;
sig_len = o2i_SCT_signature(sct, &p, len);
if (sig_len <= 0) {
CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
goto err;
}
len -= sig_len;
*in = p + len;
} else {
/* If not V1 just cache encoding */
sct->sct = BUF_memdup(p, len);
if (sct->sct == NULL)
goto err;
sct->sct_len = len;
*in = p + len;
}
if (psct != NULL) {
SCT_free(*psct);
*psct = sct;
}
return sct;
err:
SCT_free(sct);
return NULL;
}
void op_fnztrnlnm(mval *name,mval *table,int4 ind,mval *mode,mval *case_blind,mval *item,mval *ret)
{
struct dsc$descriptor lname, ltable;
uint4 attribute, status, retlen, mask, full_mask;
char acmode;
short int *item_code, pass, index;
bool full;
char buff[256], result[MAX_RESULT_SIZE];
char i, slot, last_slot;
char def_table[] = "LNM$DCL_LOGICAL";
struct
{
item_list_3 item[3];
int4 terminator;
} item_list;
error_def(ERR_BADTRNPARAM);
if(!name->str.len || MAX_LOGNAM_LENGTH < name->str.len || MAX_LOGNAM_LENGTH < table->str.len)
rts_error(VARLSTCNT(1) SS$_IVLOGNAM);
memset(&item_list,0,SIZEOF(item_list));
item_list.item[0].item_code = 0;
item_list.item[0].buffer_address = result;
item_list.item[0].buffer_length = MAX_RESULT_SIZE;
item_list.item[0].return_length_address = &retlen;
item_code = &item_list.item[0].item_code;
lname.dsc$w_length = name->str.len;
lname.dsc$a_pointer = name->str.addr;
lname.dsc$b_dtype = DSC$K_DTYPE_T;
lname.dsc$b_class = DSC$K_CLASS_S;
if (table->str.len)
{ ltable.dsc$w_length = table->str.len;
ltable.dsc$a_pointer = table->str.addr;
}else
{ ltable.dsc$a_pointer = def_table;
ltable.dsc$w_length = strlen(def_table);
}
ltable.dsc$b_dtype = DSC$K_DTYPE_T;
ltable.dsc$b_class = DSC$K_CLASS_S;
if(ind)
{ item_list.item[0].item_code = LNM$_INDEX;
item_list.item[0].buffer_address = &ind;
item_list.item[1].item_code = 0;
item_list.item[1].buffer_address = result;
item_list.item[1].buffer_length = MAX_RESULT_SIZE;
item_list.item[1].return_length_address = &retlen;
item_code = &item_list.item[1].item_code;
}
attribute = LNM$M_CASE_BLIND;
if (case_blind->str.len)
{
if (case_blind->str.len > 14)
rts_error(VARLSTCNT(4) ERR_BADTRNPARAM, 2,
MIN(SHRT_MAX, case_blind->str.len), case_blind->str.addr);
lower_to_upper(buff,case_blind->str.addr,case_blind->str.len);
if (case_blind->str.len == 14 && !memcmp(buff,"CASE_SENSITIVE",14))
attribute = 0;
else if (case_blind->str.len != 10 || memcmp(buff,"CASE_BLIND",10))
rts_error(VARLSTCNT(4) ERR_BADTRNPARAM,2,case_blind->str.len,case_blind->str.addr);
}
acmode = NOVALUE;
if (mode->str.len)
{
if (mode->str.len > 14)
rts_error(VARLSTCNT(4) ERR_BADTRNPARAM, 2,
MIN(SHRT_MAX, mode->str.len), mode->str.addr);
lower_to_upper(buff,mode->str.addr,mode->str.len);
switch (buff[0])
{
case 'U':
if ( mode->str.len = 4 && !memcmp(buff, "USER", 4))
acmode = PSL$C_USER;
case 'S':
if ( mode->str.len = 10 && !memcmp(buff, "SUPERVISOR", 10))
acmode = PSL$C_SUPER;
case 'K':
if ( mode->str.len = 6 && !memcmp(buff, "KERNEL", 6))
acmode = PSL$C_KERNEL;
case 'E':
if ( mode->str.len = 9 && !memcmp(buff, "EXECUTIVE", 9))
acmode = PSL$C_EXEC;
}
if (acmode == NOVALUE)
rts_error(VARLSTCNT(4) ERR_BADTRNPARAM,2,mode->str.len,mode->str.addr);
}
full = FALSE;
*item_code = NOVALUE;
if (item->str.len)
{ if (item->str.len > 12)
rts_error(VARLSTCNT(4) ERR_BADTRNPARAM, 2,
MIN(SHRT_MAX, item->str.len), item->str.addr);
lower_to_upper(buff,item->str.addr,item->str.len);
if ((i = buff[0] - 'A') < MIN_INDEX || i > MAX_INDEX)
{ rts_error(VARLSTCNT(4) ERR_BADTRNPARAM, 2, item->str.len, item->str.addr);
}
if ( trnlnm_index[i].len)
{ slot = trnlnm_index[i].index;
last_slot = trnlnm_index[i].len;
for (; slot < last_slot; slot++)
{ if (item->str.len == trnlnm_table[slot].len &&
!memcmp(trnlnm_table[slot].name, buff, item->str.len))
{ if (trnlnm_table[slot].item_code == FULL_VALUE)
{ if (ind)
index = 2;
else
index = 1;
*item_code = LNM$_STRING;
item_list.item[index].buffer_address = &full_mask;
item_list.item[index].buffer_length = SIZEOF(full_mask);
item_list.item[index].item_code = LNM$_ATTRIBUTES;
item_code = &item_list.item[index].item_code;
full = TRUE;
}else
{ *item_code = trnlnm_table[slot].item_code;
}
break;
}
}
}
if (*item_code == NOVALUE)
{ rts_error(VARLSTCNT(4) ERR_BADTRNPARAM,2,item->str.len,item->str.addr);
}
}else
{ *item_code = LNM$_STRING;
}
for ( pass = 0 ; ; pass++ )
{ retlen = 0;
status = sys$trnlnm(&attribute, <able, &lname, acmode == NOVALUE ? 0 : &acmode, &item_list);
if (status & 1)
{ if (*item_code == LNM$_STRING || *item_code == LNM$_TABLE)
{ ret->mvtype = MV_STR;
ENSURE_STP_FREE_SPACE(retlen);
ret->str.addr = stringpool.free;
ret->str.len = retlen;
memcpy(ret->str.addr, result, retlen);
stringpool.free += retlen;
return;
}else if (*item_code == LNM$_LENGTH || *item_code == LNM$_MAX_INDEX)
{
MV_FORCE_MVAL(ret,*(int4 *)result) ;
n2s(ret);
return;
}else if (*item_code == LNM$_ACMODE)
{ ret->mvtype = MV_STR;
switch(*result)
{ case PSL$C_USER:
ENSURE_STP_FREE_SPACE(4);
ret->str.addr = stringpool.free;
ret->str.len = 4;
memcpy(ret->str.addr, "USER", 4);
stringpool.free += 4;
return;
case PSL$C_SUPER:
ENSURE_STP_FREE_SPACE(5);
ret->str.addr = stringpool.free;
ret->str.len = 5;
memcpy(ret->str.addr, "SUPER", 5);
stringpool.free += 5;
return;
case PSL$C_EXEC:
ENSURE_STP_FREE_SPACE(9);
ret->str.addr = stringpool.free;
ret->str.len = 9;
memcpy(ret->str.addr, "EXECUTIVE", 9);
stringpool.free += 9;
return;
case PSL$C_KERNEL:
ENSURE_STP_FREE_SPACE(6);
ret->str.addr = stringpool.free;
ret->str.len = 6;
memcpy(ret->str.addr, "KERNEL", 6);
stringpool.free += 6;
return;
default:
GTMASSERT;
}
}else
{ assert(*item_code == LNM$_ATTRIBUTES);
if (full)
{ if (!retlen) /* If the logical name exists, but has no entry for the specified index, */
{ /* then the return status will be normal as the TERMINAL attribute will */
/* be filled in, but there will be no equivalence name, thus retlen == 0 */
ret->mvtype = MV_STR;
if (!pass)
{ ret->str.len = 0;
return;
}
ENSURE_STP_FREE_SPACE(lname.dsc$w_length);
ret->str.addr = stringpool.free;
ret->str.len = lname.dsc$w_length;
memcpy(ret->str.addr, lname.dsc$a_pointer, lname.dsc$w_length);
stringpool.free += lname.dsc$w_length;
return;
}
if(full_mask & LNM$M_TERMINAL)
{ ret->mvtype = MV_STR;
ENSURE_STP_FREE_SPACE(retlen);
ret->str.addr = stringpool.free;
ret->str.len = retlen;
memcpy(ret->str.addr, result, retlen);
stringpool.free += retlen;
return;
}
memcpy(buff,result,retlen);
lname.dsc$w_length = retlen;
lname.dsc$a_pointer = buff;
}else
{ mask = attr_tab[slot];
if (mask == NOVALUE)
GTMASSERT;
MV_FORCE_MVAL(ret,( *((int4*)result) & mask ? 1 : 0 )) ;
n2s(ret);
return;
}
}
}else if (status == SS$_NOLOGNAM)
{ ret->mvtype = MV_STR;
if (full && pass > 0)
{
ENSURE_STP_FREE_SPACE(lname.dsc$w_length);
ret->str.addr = stringpool.free;
ret->str.len = lname.dsc$w_length;
memcpy(ret->str.addr, lname.dsc$a_pointer, lname.dsc$w_length);
stringpool.free += lname.dsc$w_length;
}else
{ ret->str.len = 0;
}
return;
}else
{ rts_error(VARLSTCNT(1) status);
}
}
MV_FORCE_MVAL(ret, 0) ;
return;
}
static int get_server_hello(SSL *s)
{
unsigned char *buf;
unsigned char *p;
int i,j;
unsigned long len;
STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow;
buf=(unsigned char *)s->init_buf->data;
p=buf;
if (s->state == SSL2_ST_GET_SERVER_HELLO_A)
{
i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num);
if (i < (11-s->init_num))
return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
s->init_num = 11;
if (*(p++) != SSL2_MT_SERVER_HELLO)
{
if (p[-1] != SSL2_MT_ERROR)
{
ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
SSLerr(SSL_F_GET_SERVER_HELLO,
SSL_R_READ_WRONG_PACKET_TYPE);
}
else
SSLerr(SSL_F_GET_SERVER_HELLO,
SSL_R_PEER_ERROR);
return(-1);
}
#ifdef __APPLE_CC__
/* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug
* workaround. <*****@*****.**> */
s->hit=(i=*(p++))?1:0;
#else
s->hit=(*(p++))?1:0;
#endif
s->s2->tmp.cert_type= *(p++);
n2s(p,i);
if (i < s->version) s->version=i;
n2s(p,i); s->s2->tmp.cert_length=i;
n2s(p,i); s->s2->tmp.csl=i;
n2s(p,i); s->s2->tmp.conn_id_length=i;
s->state=SSL2_ST_GET_SERVER_HELLO_B;
}
/* SSL2_ST_GET_SERVER_HELLO_B */
len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length;
if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
{
SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG);
return -1;
}
j = (int)len - s->init_num;
i = ssl2_read(s,(char *)&(buf[s->init_num]),j);
if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
if (s->msg_callback)
s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */
/* things are looking good */
p = buf + 11;
if (s->hit)
{
if (s->s2->tmp.cert_length != 0)
{
SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO);
return(-1);
}
if (s->s2->tmp.cert_type != 0)
{
if (!(s->options &
SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG))
{
SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO);
return(-1);
}
}
if (s->s2->tmp.csl != 0)
{
SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);
return(-1);
}
}
else
{
#ifdef undef
/* very bad */
memset(s->session->session_id,0,
SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES);
s->session->session_id_length=0;
*/
#endif
/* we need to do this in case we were trying to reuse a
* client session but others are already reusing it.
* If this was a new 'blank' session ID, the session-id
* length will still be 0 */
if (s->session->session_id_length > 0)
{
if (!ssl_get_new_session(s,0))
{
ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
return(-1);
}
}
if (ssl2_set_certificate(s,s->s2->tmp.cert_type,
s->s2->tmp.cert_length,p) <= 0)
{
ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
return(-1);
}
p+=s->s2->tmp.cert_length;
if (s->s2->tmp.csl == 0)
{
ssl2_return_error(s,SSL2_PE_NO_CIPHER);
SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST);
return(-1);
}
/* We have just received a list of ciphers back from the
* server. We need to get the ones that match, then select
* the one we want the most :-). */
/* load the ciphers */
sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl,
&s->session->ciphers);
p+=s->s2->tmp.csl;
if (sk == NULL)
{
ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);
return(-1);
}
(void)sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp);
/* get the array of ciphers we will accept */
cl=SSL_get_ciphers(s);
(void)sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp);
/*
* If server preference flag set, choose the first
* (highest priority) cipher the server sends, otherwise
* client preference has priority.
*/
if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
{
prio = sk;
allow = cl;
}
else
{
prio = cl;
allow = sk;
}
/* In theory we could have ciphers sent back that we
* don't want to use but that does not matter since we
* will check against the list we originally sent and
* for performance reasons we should not bother to match
* the two lists up just to check. */
for (i=0; i<sk_SSL_CIPHER_num(prio); i++)
{
if (sk_SSL_CIPHER_find(allow,
sk_SSL_CIPHER_value(prio,i)) >= 0)
break;
}
if (i >= sk_SSL_CIPHER_num(prio))
{
ssl2_return_error(s,SSL2_PE_NO_CIPHER);
SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH);
return(-1);
}
s->session->cipher=sk_SSL_CIPHER_value(prio,i);
if (s->session->peer != NULL) /* can't happen*/
{
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
return(-1);
}
s->session->peer = s->session->sess_cert->peer_key->x509;
/* peer_key->x509 has been set by ssl2_set_certificate. */
CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509);
}
if (s->session->sess_cert == NULL
|| s->session->peer != s->session->sess_cert->peer_key->x509)
/* can't happen */
{
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
return(-1);
}
s->s2->conn_id_length=s->s2->tmp.conn_id_length;
if (s->s2->conn_id_length > sizeof s->s2->conn_id)
{
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG);
return -1;
}
memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length);
return(1);
}
static int execute_heartbeat(HEARTBEAT_TEST_FIXTURE fixture)
{
int result = 0;
SSL* s = fixture.s;
unsigned char *payload = fixture.payload;
unsigned char sent_buf[MAX_PRINTABLE_CHARACTERS + 1];
int return_value;
unsigned const char *p;
int actual_payload_len;
s->s3->rrec.data = payload;
s->s3->rrec.length = strlen((const char*)payload);
*payload++ = TLS1_HB_REQUEST;
s2n(fixture.sent_payload_len, payload);
/* Make a local copy of the request, since it gets overwritten at some
* point */
memcpy((char *)sent_buf, (const char*)payload, sizeof(sent_buf));
return_value = fixture.process_heartbeat(s);
if (return_value != fixture.expected_return_value)
{
printf("%s failed: expected return value %d, received %d\n",
fixture.test_case_name, fixture.expected_return_value,
return_value);
result = 1;
}
/* If there is any byte alignment, it will be stored in wbuf.offset. */
p = &(s->s3->wbuf.buf[
fixture.return_payload_offset + s->s3->wbuf.offset]);
actual_payload_len = 0;
n2s(p, actual_payload_len);
if (actual_payload_len != fixture.expected_payload_len)
{
printf("%s failed:\n expected payload len: %d\n received: %d\n",
fixture.test_case_name, fixture.expected_payload_len,
actual_payload_len);
print_payload("sent", sent_buf, strlen((const char*)sent_buf));
print_payload("received", p, actual_payload_len);
result = 1;
}
else
{
char* actual_payload = BUF_strndup((const char*)p, actual_payload_len);
if (strcmp(actual_payload, fixture.expected_return_payload) != 0)
{
printf("%s failed:\n expected payload: \"%s\"\n received: \"%s\"\n",
fixture.test_case_name, fixture.expected_return_payload,
actual_payload);
result = 1;
}
OPENSSL_free(actual_payload);
}
if (result != 0)
{
printf("** %s failed **\n--------\n", fixture.test_case_name);
}
return result;
}
/* ssl_check_for_safari attempts to fingerprint Safari using OS X
* SecureTransport using the TLS extension block in |d|, of length |n|.
* Safari, since 10.6, sends exactly these extensions, in this order:
* SNI,
* elliptic_curves
* ec_point_formats
*
* We wish to fingerprint Safari because they broke ECDHE-ECDSA support in 10.8,
* but they advertise support. So enabling ECDHE-ECDSA ciphers breaks them.
* Sadly we cannot differentiate 10.6, 10.7 and 10.8.4 (which work), from
* 10.8..10.8.3 (which don't work).
*/
static void ssl_check_for_safari(SSL *s, const unsigned char *data, const unsigned char *d, int n) {
unsigned short type, size;
static const unsigned char kSafariExtensionsBlock[] = {
0x00, 0x0a, /* elliptic_curves extension */
0x00, 0x08, /* 8 bytes */
0x00, 0x06, /* 6 bytes of curve ids */
0x00, 0x17, /* P-256 */
0x00, 0x18, /* P-384 */
0x00, 0x19, /* P-521 */
0x00, 0x0b, /* ec_point_formats */
0x00, 0x02, /* 2 bytes */
0x01, /* 1 point format */
0x00, /* uncompressed */
};
/* The following is only present in TLS 1.2 */
static const unsigned char kSafariTLS12ExtensionsBlock[] = {
0x00, 0x0d, /* signature_algorithms */
0x00, 0x0c, /* 12 bytes */
0x00, 0x0a, /* 10 bytes */
0x05, 0x01, /* SHA-384/RSA */
0x04, 0x01, /* SHA-256/RSA */
0x02, 0x01, /* SHA-1/RSA */
0x04, 0x03, /* SHA-256/ECDSA */
0x02, 0x03, /* SHA-1/ECDSA */
};
if (data >= (d+n-2))
return;
data += 2;
if (data > (d+n-4))
return;
n2s(data,type);
n2s(data,size);
if (type != TLSEXT_TYPE_server_name)
return;
if (data+size > d+n)
return;
data += size;
if (TLS1_get_client_version(s) >= TLS1_2_VERSION)
{
const size_t len1 = sizeof(kSafariExtensionsBlock);
const size_t len2 = sizeof(kSafariTLS12ExtensionsBlock);
if (data + len1 + len2 != d+n)
return;
if (memcmp(data, kSafariExtensionsBlock, len1) != 0)
return;
if (memcmp(data + len1, kSafariTLS12ExtensionsBlock, len2) != 0)
return;
}
else
{
const size_t len = sizeof(kSafariExtensionsBlock);
if (data + len != d+n)
return;
if (memcmp(data, kSafariExtensionsBlock, len) != 0)
return;
}
s->s3->is_probably_safari = 1;
}
int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
{
unsigned short type;
unsigned short size;
unsigned short len;
unsigned char *data = *p;
int renegotiate_seen = 0;
s->servername_done = 0;
s->tlsext_status_type = -1;
if (data >= (d+n-2))
goto ri_check;
n2s(data,len);
if (data > (d+n-len))
goto ri_check;
while (data <= (d+n-4))
{
n2s(data,type);
n2s(data,size);
if (data+size > (d+n))
goto ri_check;
#if 0
fprintf(stderr,"Received extension type %d size %d\n",type,size);
#endif
if (s->tlsext_debug_cb)
s->tlsext_debug_cb(s, 0, type, data, size,
s->tlsext_debug_arg);
/* The servername extension is treated as follows:
- Only the hostname type is supported with a maximum length of 255.
- The servername is rejected if too long or if it contains zeros,
in which case an fatal alert is generated.
- The servername field is maintained together with the session cache.
- When a session is resumed, the servername call back invoked in order
to allow the application to position itself to the right context.
- The servername is acknowledged if it is new for a session or when
it is identical to a previously used for the same session.
Applications can control the behaviour. They can at any time
set a 'desirable' servername for a new SSL object. This can be the
case for example with HTTPS when a Host: header field is received and
a renegotiation is requested. In this case, a possible servername
presented in the new client hello is only acknowledged if it matches
the value of the Host: field.
- Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
if they provide for changing an explicit servername context for the session,
i.e. when the session has been established with a servername extension.
- On session reconnect, the servername extension may be absent.
*/
if (type == TLSEXT_TYPE_server_name)
{
unsigned char *sdata;
int servname_type;
int dsize;
if (size < 2)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
n2s(data,dsize);
size -= 2;
if (dsize > size )
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
sdata = data;
while (dsize > 3)
{
servname_type = *(sdata++);
n2s(sdata,len);
dsize -= 3;
if (len > dsize)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (s->servername_done == 0)
switch (servname_type)
{
case TLSEXT_NAMETYPE_host_name:
if (!s->hit)
{
if(s->session->tlsext_hostname)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (len > TLSEXT_MAXLEN_host_name)
{
*al = TLS1_AD_UNRECOGNIZED_NAME;
return 0;
}
if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
{
*al = TLS1_AD_INTERNAL_ERROR;
return 0;
}
memcpy(s->session->tlsext_hostname, sdata, len);
s->session->tlsext_hostname[len]='\0';
if (strlen(s->session->tlsext_hostname) != len) {
OPENSSL_free(s->session->tlsext_hostname);
s->session->tlsext_hostname = NULL;
*al = TLS1_AD_UNRECOGNIZED_NAME;
return 0;
}
s->servername_done = 1;
}
else
s->servername_done = s->session->tlsext_hostname
&& strlen(s->session->tlsext_hostname) == len
&& strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
break;
default:
break;
}
dsize -= len;
}
if (dsize != 0)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
}
#ifndef OPENSSL_NO_EC
else if (type == TLSEXT_TYPE_ec_point_formats &&
s->version != DTLS1_VERSION)
{
unsigned char *sdata = data;
int ecpointformatlist_length = *(sdata++);
if (ecpointformatlist_length != size - 1)
{
*al = TLS1_AD_DECODE_ERROR;
return 0;
}
if (!s->hit)
{
if(s->session->tlsext_ecpointformatlist)
{
*al = TLS1_AD_DECODE_ERROR;
return 0;
}
s->session->tlsext_ecpointformatlist_length = 0;
if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
{
*al = TLS1_AD_INTERNAL_ERROR;
return 0;
}
s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
}
#if 0
fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
sdata = s->session->tlsext_ecpointformatlist;
for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
fprintf(stderr,"%i ",*(sdata++));
fprintf(stderr,"\n");
#endif
}
else if (type == TLSEXT_TYPE_elliptic_curves &&
s->version != DTLS1_VERSION)
{
unsigned char *sdata = data;
int ellipticcurvelist_length = (*(sdata++) << 8);
ellipticcurvelist_length += (*(sdata++));
if (ellipticcurvelist_length != size - 2)
{
*al = TLS1_AD_DECODE_ERROR;
return 0;
}
if (!s->hit)
{
if(s->session->tlsext_ellipticcurvelist)
{
*al = TLS1_AD_DECODE_ERROR;
return 0;
}
s->session->tlsext_ellipticcurvelist_length = 0;
if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
{
*al = TLS1_AD_INTERNAL_ERROR;
return 0;
}
s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
}
#if 0
fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
sdata = s->session->tlsext_ellipticcurvelist;
for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
fprintf(stderr,"%i ",*(sdata++));
fprintf(stderr,"\n");
#endif
}
#endif /* OPENSSL_NO_EC */
#ifdef TLSEXT_TYPE_opaque_prf_input
else if (type == TLSEXT_TYPE_opaque_prf_input &&
s->version != DTLS1_VERSION)
{
unsigned char *sdata = data;
if (size < 2)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
n2s(sdata, s->s3->client_opaque_prf_input_len);
if (s->s3->client_opaque_prf_input_len != size - 2)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
OPENSSL_free(s->s3->client_opaque_prf_input);
if (s->s3->client_opaque_prf_input_len == 0)
s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
else
s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
if (s->s3->client_opaque_prf_input == NULL)
{
*al = TLS1_AD_INTERNAL_ERROR;
return 0;
}
}
#endif
else if (type == TLSEXT_TYPE_session_ticket)
{
if (s->tls_session_ticket_ext_cb &&
!s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
{
*al = TLS1_AD_INTERNAL_ERROR;
return 0;
}
}
else if (type == TLSEXT_TYPE_renegotiate)
{
if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
return 0;
renegotiate_seen = 1;
}
else if (type == TLSEXT_TYPE_status_request &&
s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
{
if (size < 5)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
s->tlsext_status_type = *data++;
size--;
if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
{
const unsigned char *sdata;
int dsize;
/* Read in responder_id_list */
n2s(data,dsize);
size -= 2;
if (dsize > size )
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
while (dsize > 0)
{
OCSP_RESPID *id;
int idsize;
if (dsize < 4)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
n2s(data, idsize);
dsize -= 2 + idsize;
if (dsize < 0)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
sdata = data;
data += idsize;
id = d2i_OCSP_RESPID(NULL,
&sdata, idsize);
if (!id)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (data != sdata)
{
OCSP_RESPID_free(id);
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (!s->tlsext_ocsp_ids
&& !(s->tlsext_ocsp_ids =
sk_OCSP_RESPID_new_null()))
{
OCSP_RESPID_free(id);
*al = SSL_AD_INTERNAL_ERROR;
return 0;
}
if (!sk_OCSP_RESPID_push(
s->tlsext_ocsp_ids, id))
{
OCSP_RESPID_free(id);
*al = SSL_AD_INTERNAL_ERROR;
return 0;
}
}
/* Read in request_extensions */
n2s(data,dsize);
size -= 2;
if (dsize > size)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
sdata = data;
if (dsize > 0)
{
s->tlsext_ocsp_exts =
d2i_X509_EXTENSIONS(NULL,
&sdata, dsize);
if (!s->tlsext_ocsp_exts
|| (data + dsize != sdata))
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
}
}
/* We don't know what to do with any other type
* so ignore it.
*/
else
s->tlsext_status_type = -1;
}
/* session ticket processed earlier */
data+=size;
}
*p = data;
ri_check:
/* Need RI if renegotiating */
if (!renegotiate_seen && s->new_session &&
!(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
{
*al = SSL_AD_HANDSHAKE_FAILURE;
SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,
SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
return 0;
}
return 1;
}
int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
{
unsigned short length;
unsigned short type;
unsigned short size;
unsigned char *data = *p;
int tlsext_servername = 0;
int renegotiate_seen = 0;
if (data >= (d+n-2))
goto ri_check;
n2s(data,length);
if (data+length != d+n)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
while(data <= (d+n-4))
{
n2s(data,type);
n2s(data,size);
if (data+size > (d+n))
goto ri_check;
if (s->tlsext_debug_cb)
s->tlsext_debug_cb(s, 1, type, data, size,
s->tlsext_debug_arg);
if (type == TLSEXT_TYPE_server_name)
{
if (s->tlsext_hostname == NULL || size > 0)
{
*al = TLS1_AD_UNRECOGNIZED_NAME;
return 0;
}
tlsext_servername = 1;
}
#ifndef OPENSSL_NO_EC
else if (type == TLSEXT_TYPE_ec_point_formats &&
s->version != DTLS1_VERSION)
{
unsigned char *sdata = data;
int ecpointformatlist_length = *(sdata++);
if (ecpointformatlist_length != size - 1)
{
*al = TLS1_AD_DECODE_ERROR;
return 0;
}
s->session->tlsext_ecpointformatlist_length = 0;
if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
{
*al = TLS1_AD_INTERNAL_ERROR;
return 0;
}
s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
#if 0
fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
sdata = s->session->tlsext_ecpointformatlist;
for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
fprintf(stderr,"%i ",*(sdata++));
fprintf(stderr,"\n");
#endif
}
#endif /* OPENSSL_NO_EC */
else if (type == TLSEXT_TYPE_session_ticket)
{
if (s->tls_session_ticket_ext_cb &&
!s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
{
*al = TLS1_AD_INTERNAL_ERROR;
return 0;
}
if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
|| (size > 0))
{
*al = TLS1_AD_UNSUPPORTED_EXTENSION;
return 0;
}
s->tlsext_ticket_expected = 1;
}
#ifdef TLSEXT_TYPE_opaque_prf_input
else if (type == TLSEXT_TYPE_opaque_prf_input &&
s->version != DTLS1_VERSION)
{
unsigned char *sdata = data;
if (size < 2)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
n2s(sdata, s->s3->server_opaque_prf_input_len);
if (s->s3->server_opaque_prf_input_len != size - 2)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
OPENSSL_free(s->s3->server_opaque_prf_input);
if (s->s3->server_opaque_prf_input_len == 0)
s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
else
s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
if (s->s3->server_opaque_prf_input == NULL)
{
*al = TLS1_AD_INTERNAL_ERROR;
return 0;
}
}
#endif
else if (type == TLSEXT_TYPE_status_request &&
s->version != DTLS1_VERSION)
{
/* MUST be empty and only sent if we've requested
* a status request message.
*/
if ((s->tlsext_status_type == -1) || (size > 0))
{
*al = TLS1_AD_UNSUPPORTED_EXTENSION;
return 0;
}
/* Set flag to expect CertificateStatus message */
s->tlsext_status_expected = 1;
}
else if (type == TLSEXT_TYPE_renegotiate)
{
if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
return 0;
renegotiate_seen = 1;
}
data+=size;
}
if (data != d+n)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (!s->hit && tlsext_servername == 1)
{
if (s->tlsext_hostname)
{
if (s->session->tlsext_hostname == NULL)
{
s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
if (!s->session->tlsext_hostname)
{
*al = SSL_AD_UNRECOGNIZED_NAME;
return 0;
}
}
else
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
}
}
*p = data;
ri_check:
/* Determine if we need to see RI. Strictly speaking if we want to
* avoid an attack we should *always* see RI even on initial server
* hello because the client doesn't see any renegotiation during an
* attack. However this would mean we could not connect to any server
* which doesn't support RI so for the immediate future tolerate RI
* absence on initial connect only.
*/
if (!renegotiate_seen
&& !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
&& !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
{
*al = SSL_AD_HANDSHAKE_FAILURE;
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
return 0;
}
return 1;
}
int ssl23_get_client_hello(SSL *s)
{
char buf_space[11]; /* Request this many bytes in initial read.
* We can detect SSL 3.0/TLS 1.0 Client Hellos
* ('type == 3') correctly only when the following
* is in a single record, which is not guaranteed by
* the protocol specification:
* Byte Content
* 0 type \
* 1/2 version > record header
* 3/4 length /
* 5 msg_type \
* 6-8 length > Client Hello message
* 9/10 client_version /
*/
char *buf= &(buf_space[0]);
unsigned char *p,*d,*d_len,*dd;
unsigned int i;
unsigned int csl,sil,cl;
int n=0,j;
int type=0;
int v[2];
if (s->state == SSL23_ST_SR_CLNT_HELLO_A)
{
/* read the initial header */
v[0]=v[1]=0;
if (!ssl3_setup_buffers(s)) goto err;
n=ssl23_read_bytes(s, sizeof buf_space);
if (n != sizeof buf_space) return(n); /* n == -1 || n == 0 */
p=s->packet;
memcpy(buf,p,n);
if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
{
/*
* SSLv2 header
*/
if ((p[3] == 0x00) && (p[4] == 0x02))
{
v[0]=p[3]; v[1]=p[4];
/* SSLv2 */
if (!(s->options & SSL_OP_NO_SSLv2))
type=1;
}
else if (p[3] == SSL3_VERSION_MAJOR)
{
v[0]=p[3]; v[1]=p[4];
/* SSLv3/TLSv1 */
if (p[4] >= TLS1_VERSION_MINOR)
{
if (!(s->options & SSL_OP_NO_TLSv1))
{
s->version=TLS1_VERSION;
/* type=2; */ /* done later to survive restarts */
s->state=SSL23_ST_SR_CLNT_HELLO_B;
}
else if (!(s->options & SSL_OP_NO_SSLv3))
{
s->version=SSL3_VERSION;
/* type=2; */
s->state=SSL23_ST_SR_CLNT_HELLO_B;
}
else if (!(s->options & SSL_OP_NO_SSLv2))
{
type=1;
}
}
else if (!(s->options & SSL_OP_NO_SSLv3))
{
s->version=SSL3_VERSION;
/* type=2; */
s->state=SSL23_ST_SR_CLNT_HELLO_B;
}
else if (!(s->options & SSL_OP_NO_SSLv2))
type=1;
}
}
else if ((p[0] == SSL3_RT_HANDSHAKE) &&
(p[1] == SSL3_VERSION_MAJOR) &&
(p[5] == SSL3_MT_CLIENT_HELLO) &&
((p[3] == 0 && p[4] < 5 /* silly record length? */)
|| (p[9] == p[1])))
{
/*
* SSLv3 or tls1 header
*/
v[0]=p[1]; /* major version (= SSL3_VERSION_MAJOR) */
/* We must look at client_version inside the Client Hello message
* to get the correct minor version.
* However if we have only a pathologically small fragment of the
* Client Hello message, this would be difficult, and we'd have
* to read more records to find out.
* No known SSL 3.0 client fragments ClientHello like this,
* so we simply assume TLS 1.0 to avoid protocol version downgrade
* attacks. */
if (p[3] == 0 && p[4] < 6)
{
#if 0
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_SMALL);
goto err;
#else
v[1] = TLS1_VERSION_MINOR;
#endif
}
else
v[1]=p[10]; /* minor version according to client_version */
if (v[1] >= TLS1_VERSION_MINOR)
{
if (!(s->options & SSL_OP_NO_TLSv1))
{
s->version=TLS1_VERSION;
type=3;
}
else if (!(s->options & SSL_OP_NO_SSLv3))
{
s->version=SSL3_VERSION;
type=3;
}
}
else
{
/* client requests SSL 3.0 */
if (!(s->options & SSL_OP_NO_SSLv3))
{
s->version=SSL3_VERSION;
type=3;
}
else if (!(s->options & SSL_OP_NO_TLSv1))
{
/* we won't be able to use TLS of course,
* but this will send an appropriate alert */
s->version=TLS1_VERSION;
type=3;
}
}
}
else if ((strncmp("GET ", (char *)p,4) == 0) ||
(strncmp("POST ",(char *)p,5) == 0) ||
(strncmp("HEAD ",(char *)p,5) == 0) ||
(strncmp("PUT ", (char *)p,4) == 0))
{
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST);
goto err;
}
else if (strncmp("CONNECT",(char *)p,7) == 0)
{
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST);
goto err;
}
}
if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
{
/* we have SSLv3/TLSv1 in an SSLv2 header
* (other cases skip this state) */
type=2;
p=s->packet;
v[0] = p[3]; /* == SSL3_VERSION_MAJOR */
v[1] = p[4];
n=((p[0]&0x7f)<<8)|p[1];
if (n > (1024*4))
{
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
goto err;
}
j=ssl23_read_bytes(s,n+2);
if (j <= 0) return(j);
ssl3_finish_mac(s, s->packet+2, s->packet_length-2);
if (s->msg_callback)
s->msg_callback(0, SSL2_VERSION, 0, s->packet+2, s->packet_length-2, s, s->msg_callback_arg); /* CLIENT-HELLO */
p=s->packet;
p+=5;
n2s(p,csl);
n2s(p,sil);
n2s(p,cl);
d=(unsigned char *)s->init_buf->data;
if ((csl+sil+cl+11) != s->packet_length)
{
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
goto err;
}
/* record header: msg_type ... */
*(d++) = SSL3_MT_CLIENT_HELLO;
/* ... and length (actual value will be written later) */
d_len = d;
d += 3;
/* client_version */
*(d++) = SSL3_VERSION_MAJOR; /* == v[0] */
*(d++) = v[1];
/* lets populate the random area */
/* get the challenge_length */
i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
memset(d,0,SSL3_RANDOM_SIZE);
memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
d+=SSL3_RANDOM_SIZE;
/* no session-id reuse */
*(d++)=0;
/* ciphers */
j=0;
dd=d;
d+=2;
for (i=0; i<csl; i+=3)
{
if (p[i] != 0) continue;
*(d++)=p[i+1];
*(d++)=p[i+2];
j+=2;
}
s2n(j,dd);
/* COMPRESSION */
*(d++)=1;
*(d++)=0;
i = (d-(unsigned char *)s->init_buf->data) - 4;
l2n3((long)i, d_len);
/* get the data reused from the init_buf */
s->s3->tmp.reuse_message=1;
s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
s->s3->tmp.message_size=i;
}
/* imaginary new state (for program structure): */
/* s->state = SSL23_SR_CLNT_HELLO_C */
if (type == 1)
{
#ifdef OPENSSL_NO_SSL2
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
goto err;
#else
/* we are talking sslv2 */
/* we need to clean up the SSLv3/TLSv1 setup and put in the
* sslv2 stuff. */
if (s->s2 == NULL)
{
if (!ssl2_new(s))
goto err;
}
else
ssl2_clear(s);
if (s->s3 != NULL) ssl3_free(s);
if (!BUF_MEM_grow_clean(s->init_buf,
SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
{
goto err;
}
s->state=SSL2_ST_GET_CLIENT_HELLO_A;
if (s->options & SSL_OP_NO_TLSv1 && s->options & SSL_OP_NO_SSLv3)
s->s2->ssl2_rollback=0;
else
/* reject SSL 2.0 session if client supports SSL 3.0 or TLS 1.0
* (SSL 3.0 draft/RFC 2246, App. E.2) */
s->s2->ssl2_rollback=1;
/* setup the n bytes we have read so we get them from
* the sslv2 buffer */
s->rstate=SSL_ST_READ_HEADER;
s->packet_length=n;
s->packet= &(s->s2->rbuf[0]);
memcpy(s->packet,buf,n);
s->s2->rbuf_left=n;
s->s2->rbuf_offs=0;
s->method=SSLv2_server_method();
s->handshake_func=s->method->ssl_accept;
#endif
}
if ((type == 2) || (type == 3))
{
/* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */
if (!ssl_init_wbio_buffer(s,1)) goto err;
/* we are in this state */
s->state=SSL3_ST_SR_CLNT_HELLO_A;
if (type == 3)
{
/* put the 'n' bytes we have read into the input buffer
* for SSLv3 */
s->rstate=SSL_ST_READ_HEADER;
s->packet_length=n;
s->packet= &(s->s3->rbuf.buf[0]);
memcpy(s->packet,buf,n);
s->s3->rbuf.left=n;
s->s3->rbuf.offset=0;
}
else
{
s->packet_length=0;
s->s3->rbuf.left=0;
s->s3->rbuf.offset=0;
}
if (s->version == TLS1_VERSION)
s->method = TLSv1_server_method();
else
s->method = SSLv3_server_method();
#if 0 /* ssl3_get_client_hello does this */
s->client_version=(v[0]<<8)|v[1];
#endif
s->handshake_func=s->method->ssl_accept;
}
if ((type < 1) || (type > 3))
{
/* bad, very bad */
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
goto err;
}
s->init_num=0;
if (buf != buf_space) OPENSSL_free(buf);
s->first_packet=1;
return(SSL_accept(s));
err:
if (buf != buf_space) OPENSSL_free(buf);
return(-1);
}
/* Get a SERVER HELLO response from the server */
void get_server_hello(ssl_conn* ssl)
{
unsigned char buf[BUFSIZE];
unsigned char *p, *end;
int len;
int server_version, cert_length, cs_length, conn_id_length;
int found;
if (!(len = read_ssl_packet(ssl, buf, sizeof(buf)))) {
printf("Server error: %s\n", ssl_error(ntohs(*(uint16_t*)&buf[1])));
exit(1);
}
if (len < 11) {
printf("get_server_hello: Packet too short (len = %d)\n", len);
exit(1);
}
p = buf;
if (*(p++) != SSL2_MT_SERVER_HELLO) {
printf("get_server_hello: Expected SSL2 MT SERVER HELLO, got %x\n", (int)p[-1]);
exit(1);
}
if (*(p++) != 0) {
printf("get_server_hello: SESSION-ID-HIT is not 0\n");
exit(1);
}
if (*(p++) != 1) {
printf("get_server_hello: CERTIFICATE-TYPE is not SSL CT X509 CERTIFICATE\n");
exit(1);
}
n2s(p, server_version);
if (server_version != 2) {
printf("get_server_hello: Unsupported server version %d\n", server_version);
exit(1);
}
n2s(p, cert_length);
n2s(p, cs_length);
n2s(p, conn_id_length);
if (len != 11 + cert_length + cs_length + conn_id_length) {
printf("get_server_hello: Malformed packet size\n");
exit(1);
}
/* read the server certificate */
ssl->x509 = NULL;
ssl->x509=d2i_X509(NULL,&p,(long)cert_length);
if (ssl->x509 == NULL) {
printf("get server hello: Cannot parse x509 certificate\n");
exit(1);
}
if (cs_length % 3 != 0) {
printf("get server hello: CIPHER-SPECS-LENGTH is not a multiple of 3\n");
exit(1);
}
found = 0;
for (end=p+cs_length; p < end; p += 3) {
if ((p[0] == 0x01) && (p[1] == 0x00) && (p[2] == 0x80))
found = 1; /* SSL CK RC4 128 WITH MD5 */
}
if (!found) {
printf("get server hello: Remote server does not support 128 bit RC4\n");
exit(1);
}
if (conn_id_length > SSL2_MAX_CONNECTION_ID_LENGTH) {
printf("get server hello: CONNECTION-ID-LENGTH is too long\n");
exit(1);
}
/* The connection id is sent back to the server in the CLIENT FINISHED packet */
ssl->conn_id_length = conn_id_length;
memcpy(ssl->conn_id, p, conn_id_length);
}
int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
{
unsigned short length;
unsigned short type;
unsigned short size;
unsigned char *data = *p;
int tlsext_servername = 0;
int renegotiate_seen = 0;
if (data >= (d+n-2))
goto ri_check;
n2s(data,length);
if (data+length != d+n)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
while(data <= (d+n-4))
{
n2s(data,type);
n2s(data,size);
if (data+size > (d+n))
goto ri_check;
if (s->tlsext_debug_cb)
s->tlsext_debug_cb(s, 1, type, data, size,
s->tlsext_debug_arg);
if (type == TLSEXT_TYPE_server_name)
{
if (s->tlsext_hostname == NULL || size > 0)
{
*al = TLS1_AD_UNRECOGNIZED_NAME;
return 0;
}
tlsext_servername = 1;
}
else if (type == TLSEXT_TYPE_session_ticket)
{
if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
|| (size > 0))
{
*al = TLS1_AD_UNSUPPORTED_EXTENSION;
return 0;
}
s->tlsext_ticket_expected = 1;
}
else if (type == TLSEXT_TYPE_status_request &&
s->version != DTLS1_VERSION)
{
/* MUST be empty and only sent if we've requested
* a status request message.
*/
if ((s->tlsext_status_type == -1) || (size > 0))
{
*al = TLS1_AD_UNSUPPORTED_EXTENSION;
return 0;
}
/* Set flag to expect CertificateStatus message */
s->tlsext_status_expected = 1;
}
else if (type == TLSEXT_TYPE_renegotiate)
{
if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
return 0;
renegotiate_seen = 1;
}
data+=size;
}
if (data != d+n)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (!s->hit && tlsext_servername == 1)
{
if (s->tlsext_hostname)
{
if (s->session->tlsext_hostname == NULL)
{
s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
if (!s->session->tlsext_hostname)
{
*al = SSL_AD_UNRECOGNIZED_NAME;
return 0;
}
}
else
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
}
}
*p = data;
ri_check:
/* Determine if we need to see RI. Strictly speaking if we want to
* avoid an attack we should *always* see RI even on initial server
* hello because the client doesn't see any renegotiation during an
* attack. However this would mean we could not connect to any server
* which doesn't support RI so for the immediate future tolerate RI
* absence on initial connect only.
*/
if (!renegotiate_seen
&& !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
&& !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
{
*al = SSL_AD_HANDSHAKE_FAILURE;
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
return 0;
}
return 1;
}
int ssl23_get_client_hello(SSL *s)
{
/*-
* Request this many bytes in initial read.
* We can detect SSL 3.0/TLS 1.0 Client Hellos
* ('type == 3') correctly only when the following
* is in a single record, which is not guaranteed by
* the protocol specification:
* Byte Content
* 0 type \
* 1/2 version > record header
* 3/4 length /
* 5 msg_type \
* 6-8 length > Client Hello message
* 9/10 client_version /
*/
char buf_space[11];
char *buf = &(buf_space[0]);
unsigned char *p, *d, *d_len, *dd;
unsigned int i;
unsigned int csl, sil, cl;
int n = 0, j;
int type = 0;
int v[2];
if (s->state == SSL23_ST_SR_CLNT_HELLO_A) {
/* read the initial header */
v[0] = v[1] = 0;
if (!ssl3_setup_buffers(s))
goto err;
n = ssl23_read_bytes(s, sizeof buf_space);
if (n != sizeof buf_space)
return (n); /* n == -1 || n == 0 */
p = s->packet;
memcpy(buf, p, n);
if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO)) {
/*
* SSLv2 header
*/
if ((p[3] == 0x00) && (p[4] == 0x02)) {
v[0] = p[3];
v[1] = p[4];
/* SSLv2 */
if (!(s->options & SSL_OP_NO_SSLv2))
type = 1;
} else if (p[3] == SSL3_VERSION_MAJOR) {
v[0] = p[3];
v[1] = p[4];
/* SSLv3/TLSv1 */
if (p[4] >= TLS1_VERSION_MINOR) {
if (p[4] >= TLS1_2_VERSION_MINOR &&
!(s->options & SSL_OP_NO_TLSv1_2)) {
s->version = TLS1_2_VERSION;
s->state = SSL23_ST_SR_CLNT_HELLO_B;
} else if (p[4] >= TLS1_1_VERSION_MINOR &&
!(s->options & SSL_OP_NO_TLSv1_1)) {
s->version = TLS1_1_VERSION;
/*
* type=2;
*//*
* done later to survive restarts
*/
s->state = SSL23_ST_SR_CLNT_HELLO_B;
} else if (!(s->options & SSL_OP_NO_TLSv1)) {
s->version = TLS1_VERSION;
/*
* type=2;
*//*
* done later to survive restarts
*/
s->state = SSL23_ST_SR_CLNT_HELLO_B;
} else if (!(s->options & SSL_OP_NO_SSLv3)) {
s->version = SSL3_VERSION;
/* type=2; */
s->state = SSL23_ST_SR_CLNT_HELLO_B;
} else if (!(s->options & SSL_OP_NO_SSLv2)) {
type = 1;
}
} else if (!(s->options & SSL_OP_NO_SSLv3)) {
s->version = SSL3_VERSION;
/* type=2; */
s->state = SSL23_ST_SR_CLNT_HELLO_B;
} else if (!(s->options & SSL_OP_NO_SSLv2))
type = 1;
}
}
/* p[4] < 5 ... silly record length? */
else if ((p[0] == SSL3_RT_HANDSHAKE) &&
(p[1] == SSL3_VERSION_MAJOR) &&
(p[5] == SSL3_MT_CLIENT_HELLO) && ((p[3] == 0 && p[4] < 5)
|| (p[9] >= p[1]))) {
/*
* SSLv3 or tls1 header
*/
v[0] = p[1]; /* major version (= SSL3_VERSION_MAJOR) */
/*
* We must look at client_version inside the Client Hello message
* to get the correct minor version. However if we have only a
* pathologically small fragment of the Client Hello message, this
* would be difficult, and we'd have to read more records to find
* out. No known SSL 3.0 client fragments ClientHello like this,
* so we simply reject such connections to avoid protocol version
* downgrade attacks.
*/
if (p[3] == 0 && p[4] < 6) {
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_RECORD_TOO_SMALL);
goto err;
}
/*
* if major version number > 3 set minor to a value which will
* use the highest version 3 we support. If TLS 2.0 ever appears
* we will need to revise this....
*/
if (p[9] > SSL3_VERSION_MAJOR)
v[1] = 0xff;
else
v[1] = p[10]; /* minor version according to client_version */
if (v[1] >= TLS1_VERSION_MINOR) {
if (v[1] >= TLS1_2_VERSION_MINOR &&
!(s->options & SSL_OP_NO_TLSv1_2)) {
s->version = TLS1_2_VERSION;
type = 3;
} else if (v[1] >= TLS1_1_VERSION_MINOR &&
!(s->options & SSL_OP_NO_TLSv1_1)) {
s->version = TLS1_1_VERSION;
type = 3;
} else if (!(s->options & SSL_OP_NO_TLSv1)) {
s->version = TLS1_VERSION;
type = 3;
} else if (!(s->options & SSL_OP_NO_SSLv3)) {
s->version = SSL3_VERSION;
type = 3;
}
} else {
/* client requests SSL 3.0 */
if (!(s->options & SSL_OP_NO_SSLv3)) {
s->version = SSL3_VERSION;
type = 3;
} else if (!(s->options & SSL_OP_NO_TLSv1)) {
/*
* we won't be able to use TLS of course, but this will
* send an appropriate alert
*/
s->version = TLS1_VERSION;
type = 3;
}
}
} else if ((strncmp("GET ", (char *)p, 4) == 0) ||
(strncmp("POST ", (char *)p, 5) == 0) ||
(strncmp("HEAD ", (char *)p, 5) == 0) ||
(strncmp("PUT ", (char *)p, 4) == 0)) {
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_HTTP_REQUEST);
goto err;
} else if (strncmp("CONNECT", (char *)p, 7) == 0) {
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_HTTPS_PROXY_REQUEST);
goto err;
}
}
/* ensure that TLS_MAX_VERSION is up-to-date */
OPENSSL_assert(s->version <= TLS_MAX_VERSION);
if (s->version < TLS1_2_VERSION && tls1_suiteb(s)) {
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,
SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
goto err;
}
#ifdef OPENSSL_FIPS
if (FIPS_mode() && (s->version < TLS1_VERSION)) {
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,
SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
goto err;
}
#endif
if (s->state == SSL23_ST_SR_CLNT_HELLO_B) {
/*
* we have SSLv3/TLSv1 in an SSLv2 header (other cases skip this
* state)
*/
type = 2;
p = s->packet;
v[0] = p[3]; /* == SSL3_VERSION_MAJOR */
v[1] = p[4];
/*-
* An SSLv3/TLSv1 backwards-compatible CLIENT-HELLO in an SSLv2
* header is sent directly on the wire, not wrapped as a TLS
* record. It's format is:
* Byte Content
* 0-1 msg_length
* 2 msg_type
* 3-4 version
* 5-6 cipher_spec_length
* 7-8 session_id_length
* 9-10 challenge_length
* ... ...
*/
n = ((p[0] & 0x7f) << 8) | p[1];
if (n > (1024 * 4)) {
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_RECORD_TOO_LARGE);
goto err;
}
if (n < 9) {
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,
SSL_R_RECORD_LENGTH_MISMATCH);
goto err;
}
j = ssl23_read_bytes(s, n + 2);
/*
* We previously read 11 bytes, so if j > 0, we must have j == n+2 ==
* s->packet_length. We have at least 11 valid packet bytes.
*/
if (j <= 0)
return (j);
ssl3_finish_mac(s, s->packet + 2, s->packet_length - 2);
/* CLIENT-HELLO */
if (s->msg_callback)
s->msg_callback(0, SSL2_VERSION, 0, s->packet + 2,
s->packet_length - 2, s, s->msg_callback_arg);
p = s->packet;
p += 5;
n2s(p, csl);
n2s(p, sil);
n2s(p, cl);
d = (unsigned char *)s->init_buf->data;
if ((csl + sil + cl + 11) != s->packet_length) { /* We can't have TLS
* extensions in SSL
* 2.0 format *
* Client Hello, can
* we? Error
* condition should
* be * '>'
* otherweise */
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,
SSL_R_RECORD_LENGTH_MISMATCH);
goto err;
}
/* record header: msg_type ... */
*(d++) = SSL3_MT_CLIENT_HELLO;
/* ... and length (actual value will be written later) */
d_len = d;
d += 3;
/* client_version */
*(d++) = SSL3_VERSION_MAJOR; /* == v[0] */
*(d++) = v[1];
/* lets populate the random area */
/* get the challenge_length */
i = (cl > SSL3_RANDOM_SIZE) ? SSL3_RANDOM_SIZE : cl;
memset(d, 0, SSL3_RANDOM_SIZE);
memcpy(&(d[SSL3_RANDOM_SIZE - i]), &(p[csl + sil]), i);
d += SSL3_RANDOM_SIZE;
/* no session-id reuse */
*(d++) = 0;
/* ciphers */
j = 0;
dd = d;
d += 2;
for (i = 0; i < csl; i += 3) {
if (p[i] != 0)
continue;
*(d++) = p[i + 1];
*(d++) = p[i + 2];
j += 2;
}
s2n(j, dd);
/* COMPRESSION */
*(d++) = 1;
*(d++) = 0;
#if 0
/* copy any remaining data with may be extensions */
p = p + csl + sil + cl;
while (p < s->packet + s->packet_length) {
*(d++) = *(p++);
}
#endif
i = (d - (unsigned char *)s->init_buf->data) - 4;
l2n3((long)i, d_len);
/* get the data reused from the init_buf */
s->s3->tmp.reuse_message = 1;
s->s3->tmp.message_type = SSL3_MT_CLIENT_HELLO;
s->s3->tmp.message_size = i;
}
/* imaginary new state (for program structure): */
/* s->state = SSL23_SR_CLNT_HELLO_C */
if (type == 1) {
#ifdef OPENSSL_NO_SSL2
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
goto err;
#else
/* we are talking sslv2 */
/*
* we need to clean up the SSLv3/TLSv1 setup and put in the sslv2
* stuff.
*/
if (s->s2 == NULL) {
if (!ssl2_new(s))
goto err;
} else
ssl2_clear(s);
if (s->s3 != NULL)
ssl3_free(s);
if (!BUF_MEM_grow_clean(s->init_buf,
SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) {
goto err;
}
s->state = SSL2_ST_GET_CLIENT_HELLO_A;
if (s->options & SSL_OP_NO_TLSv1 && s->options & SSL_OP_NO_SSLv3)
s->s2->ssl2_rollback = 0;
else
/*
* reject SSL 2.0 session if client supports SSL 3.0 or TLS 1.0
* (SSL 3.0 draft/RFC 2246, App. E.2)
*/
s->s2->ssl2_rollback = 1;
/*
* setup the n bytes we have read so we get them from the sslv2
* buffer
*/
s->rstate = SSL_ST_READ_HEADER;
s->packet_length = n;
s->packet = &(s->s2->rbuf[0]);
memcpy(s->packet, buf, n);
s->s2->rbuf_left = n;
s->s2->rbuf_offs = 0;
s->method = SSLv2_server_method();
s->handshake_func = s->method->ssl_accept;
#endif
}
if ((type == 2) || (type == 3)) {
/*
* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style)
*/
const SSL_METHOD *new_method;
new_method = ssl23_get_server_method(s->version);
if (new_method == NULL) {
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
goto err;
}
s->method = new_method;
if (!ssl_init_wbio_buffer(s, 1))
goto err;
/* we are in this state */
s->state = SSL3_ST_SR_CLNT_HELLO_A;
if (type == 3) {
/*
* put the 'n' bytes we have read into the input buffer for SSLv3
*/
s->rstate = SSL_ST_READ_HEADER;
s->packet_length = n;
if (s->s3->rbuf.buf == NULL)
if (!ssl3_setup_read_buffer(s))
goto err;
s->packet = &(s->s3->rbuf.buf[0]);
memcpy(s->packet, buf, n);
s->s3->rbuf.left = n;
s->s3->rbuf.offset = 0;
} else {
s->packet_length = 0;
s->s3->rbuf.left = 0;
s->s3->rbuf.offset = 0;
}
#if 0 /* ssl3_get_client_hello does this */
s->client_version = (v[0] << 8) | v[1];
#endif
s->handshake_func = s->method->ssl_accept;
}
if ((type < 1) || (type > 3)) {
/* bad, very bad */
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL);
goto err;
}
s->init_num = 0;
if (buf != buf_space)
OPENSSL_free(buf);
return (SSL_accept(s));
err:
if (buf != buf_space)
OPENSSL_free(buf);
return (-1);
}
int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
const unsigned char *limit, SSL_SESSION **ret)
{
/* Point after session ID in client hello */
const unsigned char *p = session_id + len;
unsigned short i;
/* If tickets disabled behave as if no ticket present
* to permit stateful resumption.
*/
if (SSL_get_options(s) & SSL_OP_NO_TICKET)
return 1;
if ((s->version <= SSL3_VERSION) || !limit)
return 1;
if (p >= limit)
return -1;
/* Skip past DTLS cookie */
if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
{
i = *(p++);
p+= i;
if (p >= limit)
return -1;
}
/* Skip past cipher list */
n2s(p, i);
p+= i;
if (p >= limit)
return -1;
/* Skip past compression algorithm list */
i = *(p++);
p += i;
if (p > limit)
return -1;
/* Now at start of extensions */
if ((p + 2) >= limit)
return 1;
n2s(p, i);
while ((p + 4) <= limit)
{
unsigned short type, size;
n2s(p, type);
n2s(p, size);
if (p + size > limit)
return 1;
if (type == TLSEXT_TYPE_session_ticket)
{
/* If zero length note client will accept a ticket
* and indicate cache miss to trigger full handshake
*/
if (size == 0)
{
s->tlsext_ticket_expected = 1;
return 0; /* Cache miss */
}
return tls_decrypt_ticket(s, p, size, session_id, len,
ret);
}
p += size;
}
return 1;
}
/*-
* Return up to 'len' payload bytes received in 'type' records.
* 'type' is one of the following:
*
* - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us)
* - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us)
* - 0 (during a shutdown, no data has to be returned)
*
* If we don't have stored data to work from, read a SSL/TLS record first
* (possibly multiple records if we still don't have anything to return).
*
* This function must handle any surprises the peer may have for us, such as
* Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec
* messages are treated as if they were handshake messages *if* the |recd_type|
* argument is non NULL.
* Also if record payloads contain fragments too small to process, we store
* them until there is enough for the respective protocol (the record protocol
* may use arbitrary fragmentation and even interleaving):
* Change cipher spec protocol
* just 1 byte needed, no need for keeping anything stored
* Alert protocol
* 2 bytes needed (AlertLevel, AlertDescription)
* Handshake protocol
* 4 bytes needed (HandshakeType, uint24 length) -- we just have
* to detect unexpected Client Hello and Hello Request messages
* here, anything else is handled by higher layers
* Application data protocol
* none of our business
*/
int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
int len, int peek)
{
int al, i, j, ret;
unsigned int n;
SSL3_RECORD *rr;
void (*cb) (const SSL *ssl, int type2, int val) = NULL;
if (!SSL3_BUFFER_is_initialised(&s->rlayer.rbuf)) {
/* Not initialized yet */
if (!ssl3_setup_buffers(s))
return (-1);
}
if ((type && (type != SSL3_RT_APPLICATION_DATA) &&
(type != SSL3_RT_HANDSHAKE)) ||
(peek && (type != SSL3_RT_APPLICATION_DATA))) {
SSLerr(SSL_F_DTLS1_READ_BYTES, ERR_R_INTERNAL_ERROR);
return -1;
}
/*
* check whether there's a handshake message (client hello?) waiting
*/
if ((ret = have_handshake_fragment(s, type, buf, len)))
return ret;
/*
* Now s->rlayer.d->handshake_fragment_len == 0 if
* type == SSL3_RT_HANDSHAKE.
*/
#ifndef OPENSSL_NO_SCTP
/*
* Continue handshake if it had to be interrupted to read app data with
* SCTP.
*/
if ((!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) ||
(BIO_dgram_is_sctp(SSL_get_rbio(s))
&& ossl_statem_in_sctp_read_sock(s)
&& s->s3->in_read_app_data != 2))
#else
if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s))
#endif
{
/* type == SSL3_RT_APPLICATION_DATA */
i = s->handshake_func(s);
if (i < 0)
return (i);
if (i == 0) {
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
return (-1);
}
}
start:
s->rwstate = SSL_NOTHING;
/*-
* s->s3->rrec.type - is the type of record
* s->s3->rrec.data, - data
* s->s3->rrec.off, - offset into 'data' for next read
* s->s3->rrec.length, - number of bytes.
*/
rr = s->rlayer.rrec;
/*
* We are not handshaking and have no data yet, so process data buffered
* during the last handshake in advance, if any.
*/
if (SSL_is_init_finished(s) && SSL3_RECORD_get_length(rr) == 0) {
pitem *item;
item = pqueue_pop(s->rlayer.d->buffered_app_data.q);
if (item) {
#ifndef OPENSSL_NO_SCTP
/* Restore bio_dgram_sctp_rcvinfo struct */
if (BIO_dgram_is_sctp(SSL_get_rbio(s))) {
DTLS1_RECORD_DATA *rdata = (DTLS1_RECORD_DATA *)item->data;
BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SCTP_SET_RCVINFO,
sizeof(rdata->recordinfo), &rdata->recordinfo);
}
#endif
dtls1_copy_record(s, item);
OPENSSL_free(item->data);
pitem_free(item);
}
}
/* Check for timeout */
if (dtls1_handle_timeout(s) > 0)
goto start;
/* get new packet if necessary */
if ((SSL3_RECORD_get_length(rr) == 0)
|| (s->rlayer.rstate == SSL_ST_READ_BODY)) {
ret = dtls1_get_record(s);
if (ret <= 0) {
ret = dtls1_read_failed(s, ret);
/* anything other than a timeout is an error */
if (ret <= 0)
return (ret);
else
goto start;
}
}
/* we now have a packet which can be read and processed */
if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec,
* reset by ssl3_get_finished */
&& (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) {
/*
* We now have application data between CCS and Finished. Most likely
* the packets were reordered on their way, so buffer the application
* data for later processing rather than dropping the connection.
*/
if (dtls1_buffer_record(s, &(s->rlayer.d->buffered_app_data),
SSL3_RECORD_get_seq_num(rr)) < 0) {
SSLerr(SSL_F_DTLS1_READ_BYTES, ERR_R_INTERNAL_ERROR);
return -1;
}
SSL3_RECORD_set_length(rr, 0);
goto start;
}
/*
* If the other end has shut down, throw anything we read away (even in
* 'peek' mode)
*/
if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
SSL3_RECORD_set_length(rr, 0);
s->rwstate = SSL_NOTHING;
return (0);
}
if (type == SSL3_RECORD_get_type(rr)
|| (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC
&& type == SSL3_RT_HANDSHAKE && recvd_type != NULL)) {
/*
* SSL3_RT_APPLICATION_DATA or
* SSL3_RT_HANDSHAKE or
* SSL3_RT_CHANGE_CIPHER_SPEC
*/
/*
* make sure that we are not getting application data when we are
* doing a handshake for the first time
*/
if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) &&
(s->enc_read_ctx == NULL)) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_APP_DATA_IN_HANDSHAKE);
goto f_err;
}
if (recvd_type != NULL)
*recvd_type = SSL3_RECORD_get_type(rr);
if (len <= 0)
return (len);
if ((unsigned int)len > SSL3_RECORD_get_length(rr))
n = SSL3_RECORD_get_length(rr);
else
n = (unsigned int)len;
memcpy(buf, &(SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)]), n);
if (!peek) {
SSL3_RECORD_sub_length(rr, n);
SSL3_RECORD_add_off(rr, n);
if (SSL3_RECORD_get_length(rr) == 0) {
s->rlayer.rstate = SSL_ST_READ_HEADER;
SSL3_RECORD_set_off(rr, 0);
}
}
#ifndef OPENSSL_NO_SCTP
/*
* We were about to renegotiate but had to read belated application
* data first, so retry.
*/
if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
SSL3_RECORD_get_type(rr) == SSL3_RT_APPLICATION_DATA &&
ossl_statem_in_sctp_read_sock(s)) {
s->rwstate = SSL_READING;
BIO_clear_retry_flags(SSL_get_rbio(s));
BIO_set_retry_read(SSL_get_rbio(s));
}
/*
* We might had to delay a close_notify alert because of reordered
* app data. If there was an alert and there is no message to read
* anymore, finally set shutdown.
*/
if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
s->d1->shutdown_received
&& !BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
return (0);
}
#endif
return (n);
}
/*
* If we get here, then type != rr->type; if we have a handshake message,
* then it was unexpected (Hello Request or Client Hello).
*/
/*
* In case of record types for which we have 'fragment' storage, fill
* that so that we can process the data at a fixed place.
*/
{
unsigned int k, dest_maxlen = 0;
unsigned char *dest = NULL;
unsigned int *dest_len = NULL;
if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) {
dest_maxlen = sizeof s->rlayer.d->handshake_fragment;
dest = s->rlayer.d->handshake_fragment;
dest_len = &s->rlayer.d->handshake_fragment_len;
} else if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) {
dest_maxlen = sizeof(s->rlayer.d->alert_fragment);
dest = s->rlayer.d->alert_fragment;
dest_len = &s->rlayer.d->alert_fragment_len;
}
#ifndef OPENSSL_NO_HEARTBEATS
else if (SSL3_RECORD_get_type(rr) == DTLS1_RT_HEARTBEAT) {
/* We allow a 0 return */
if (dtls1_process_heartbeat(s, SSL3_RECORD_get_data(rr),
SSL3_RECORD_get_length(rr)) < 0) {
return -1;
}
/* Exit and notify application to read again */
SSL3_RECORD_set_length(rr, 0);
s->rwstate = SSL_READING;
BIO_clear_retry_flags(SSL_get_rbio(s));
BIO_set_retry_read(SSL_get_rbio(s));
return (-1);
}
#endif
/* else it's a CCS message, or application data or wrong */
else if (SSL3_RECORD_get_type(rr) != SSL3_RT_CHANGE_CIPHER_SPEC) {
/*
* Application data while renegotiating is allowed. Try again
* reading.
*/
if (SSL3_RECORD_get_type(rr) == SSL3_RT_APPLICATION_DATA) {
BIO *bio;
s->s3->in_read_app_data = 2;
bio = SSL_get_rbio(s);
s->rwstate = SSL_READING;
BIO_clear_retry_flags(bio);
BIO_set_retry_read(bio);
return (-1);
}
/* Not certain if this is the right error handling */
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_UNEXPECTED_RECORD);
goto f_err;
}
if (dest_maxlen > 0) {
/*
* XDTLS: In a pathological case, the Client Hello may be
* fragmented--don't always expect dest_maxlen bytes
*/
if (SSL3_RECORD_get_length(rr) < dest_maxlen) {
#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
/*
* for normal alerts rr->length is 2, while
* dest_maxlen is 7 if we were to handle this
* non-existing alert...
*/
FIX ME
#endif
s->rlayer.rstate = SSL_ST_READ_HEADER;
SSL3_RECORD_set_length(rr, 0);
goto start;
}
/* now move 'n' bytes: */
for (k = 0; k < dest_maxlen; k++) {
dest[k] = SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)];
SSL3_RECORD_add_off(rr, 1);
SSL3_RECORD_add_length(rr, -1);
}
*dest_len = dest_maxlen;
}
}
/*-
* s->rlayer.d->handshake_fragment_len == 12 iff rr->type == SSL3_RT_HANDSHAKE;
* s->rlayer.d->alert_fragment_len == 7 iff rr->type == SSL3_RT_ALERT.
* (Possibly rr is 'empty' now, i.e. rr->length may be 0.)
*/
/* If we are a client, check for an incoming 'Hello Request': */
if ((!s->server) &&
(s->rlayer.d->handshake_fragment_len >= DTLS1_HM_HEADER_LENGTH) &&
(s->rlayer.d->handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) &&
(s->session != NULL) && (s->session->cipher != NULL)) {
s->rlayer.d->handshake_fragment_len = 0;
if ((s->rlayer.d->handshake_fragment[1] != 0) ||
(s->rlayer.d->handshake_fragment[2] != 0) ||
(s->rlayer.d->handshake_fragment[3] != 0)) {
al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_BAD_HELLO_REQUEST);
goto f_err;
}
/*
* no need to check sequence number on HELLO REQUEST messages
*/
if (s->msg_callback)
s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
s->rlayer.d->handshake_fragment, 4, s,
s->msg_callback_arg);
if (SSL_is_init_finished(s) &&
!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) &&
!s->s3->renegotiate) {
s->d1->handshake_read_seq++;
s->new_session = 1;
ssl3_renegotiate(s);
if (ssl3_renegotiate_check(s)) {
i = s->handshake_func(s);
if (i < 0)
return (i);
if (i == 0) {
SSLerr(SSL_F_DTLS1_READ_BYTES,
SSL_R_SSL_HANDSHAKE_FAILURE);
return (-1);
}
if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
if (SSL3_BUFFER_get_left(&s->rlayer.rbuf) == 0) {
/* no read-ahead left? */
BIO *bio;
/*
* In the case where we try to read application data,
* but we trigger an SSL handshake, we return -1 with
* the retry option set. Otherwise renegotiation may
* cause nasty problems in the blocking world
*/
s->rwstate = SSL_READING;
bio = SSL_get_rbio(s);
BIO_clear_retry_flags(bio);
BIO_set_retry_read(bio);
return (-1);
}
}
}
}
/*
* we either finished a handshake or ignored the request, now try
* again to obtain the (application) data we were asked for
*/
goto start;
}
if (s->rlayer.d->alert_fragment_len >= DTLS1_AL_HEADER_LENGTH) {
int alert_level = s->rlayer.d->alert_fragment[0];
int alert_descr = s->rlayer.d->alert_fragment[1];
s->rlayer.d->alert_fragment_len = 0;
if (s->msg_callback)
s->msg_callback(0, s->version, SSL3_RT_ALERT,
s->rlayer.d->alert_fragment, 2, s,
s->msg_callback_arg);
if (s->info_callback != NULL)
cb = s->info_callback;
else if (s->ctx->info_callback != NULL)
cb = s->ctx->info_callback;
if (cb != NULL) {
j = (alert_level << 8) | alert_descr;
cb(s, SSL_CB_READ_ALERT, j);
}
if (alert_level == SSL3_AL_WARNING) {
s->s3->warn_alert = alert_descr;
if (alert_descr == SSL_AD_CLOSE_NOTIFY) {
#ifndef OPENSSL_NO_SCTP
/*
* With SCTP and streams the socket may deliver app data
* after a close_notify alert. We have to check this first so
* that nothing gets discarded.
*/
if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
s->d1->shutdown_received = 1;
s->rwstate = SSL_READING;
BIO_clear_retry_flags(SSL_get_rbio(s));
BIO_set_retry_read(SSL_get_rbio(s));
return -1;
}
#endif
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
return (0);
}
#if 0
/* XXX: this is a possible improvement in the future */
/* now check if it's a missing record */
if (alert_descr == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE) {
unsigned short seq;
unsigned int frag_off;
unsigned char *p = &(s->rlayer.d->alert_fragment[2]);
n2s(p, seq);
n2l3(p, frag_off);
dtls1_retransmit_message(s,
dtls1_get_queue_priority
(frag->msg_header.seq, 0), frag_off,
&found);
if (!found && SSL_in_init(s)) {
/*
* fprintf( stderr,"in init = %d\n", SSL_in_init(s));
*/
/*
* requested a message not yet sent, send an alert
* ourselves
*/
ssl3_send_alert(s, SSL3_AL_WARNING,
DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
}
}
#endif
} else if (alert_level == SSL3_AL_FATAL) {
char tmp[16];
s->rwstate = SSL_NOTHING;
s->s3->fatal_alert = alert_descr;
SSLerr(SSL_F_DTLS1_READ_BYTES,
SSL_AD_REASON_OFFSET + alert_descr);
BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr);
ERR_add_error_data(2, "SSL alert number ", tmp);
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
SSL_CTX_remove_session(s->ctx, s->session);
return (0);
} else {
al = SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE);
goto f_err;
}
goto start;
}
if (s->shutdown & SSL_SENT_SHUTDOWN) { /* but we have not received a
* shutdown */
s->rwstate = SSL_NOTHING;
SSL3_RECORD_set_length(rr, 0);
return (0);
}
if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) {
/*
* We can't process a CCS now, because previous handshake messages
* are still missing, so just drop it.
*/
SSL3_RECORD_set_length(rr, 0);
goto start;
}
/*
* Unexpected handshake message (Client Hello, or protocol violation)
*/
if ((s->rlayer.d->handshake_fragment_len >= DTLS1_HM_HEADER_LENGTH) &&
!ossl_statem_get_in_handshake(s)) {
struct hm_header_st msg_hdr;
/* this may just be a stale retransmit */
dtls1_get_message_header(rr->data, &msg_hdr);
if (SSL3_RECORD_get_epoch(rr) != s->rlayer.d->r_epoch) {
SSL3_RECORD_set_length(rr, 0);
goto start;
}
/*
* If we are server, we may have a repeated FINISHED of the client
* here, then retransmit our CCS and FINISHED.
*/
if (msg_hdr.type == SSL3_MT_FINISHED) {
if (dtls1_check_timeout_num(s) < 0)
return -1;
dtls1_retransmit_buffered_messages(s);
SSL3_RECORD_set_length(rr, 0);
goto start;
}
if (SSL_is_init_finished(s) &&
!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) {
ossl_statem_set_in_init(s, 1);
s->renegotiate = 1;
s->new_session = 1;
}
i = s->handshake_func(s);
if (i < 0)
return (i);
if (i == 0) {
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
return (-1);
}
if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
if (SSL3_BUFFER_get_left(&s->rlayer.rbuf) == 0) {
/* no read-ahead left? */
BIO *bio;
/*
* In the case where we try to read application data, but we
* trigger an SSL handshake, we return -1 with the retry
* option set. Otherwise renegotiation may cause nasty
* problems in the blocking world
*/
s->rwstate = SSL_READING;
bio = SSL_get_rbio(s);
BIO_clear_retry_flags(bio);
BIO_set_retry_read(bio);
return (-1);
}
}
goto start;
}
switch (SSL3_RECORD_get_type(rr)) {
default:
/* TLS just ignores unknown message types */
if (s->version == TLS1_VERSION) {
SSL3_RECORD_set_length(rr, 0);
goto start;
}
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_UNEXPECTED_RECORD);
goto f_err;
case SSL3_RT_CHANGE_CIPHER_SPEC:
case SSL3_RT_ALERT:
case SSL3_RT_HANDSHAKE:
/*
* we already handled all of these, with the possible exception of
* SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but
* that should not happen when type != rr->type
*/
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_DTLS1_READ_BYTES, ERR_R_INTERNAL_ERROR);
goto f_err;
case SSL3_RT_APPLICATION_DATA:
/*
* At this point, we were expecting handshake data, but have
* application data. If the library was running inside ssl3_read()
* (i.e. in_read_app_data is set) and it makes sense to read
* application data at this point (session renegotiation not yet
* started), we will indulge it.
*/
if (s->s3->in_read_app_data &&
(s->s3->total_renegotiations != 0) &&
ossl_statem_app_data_allowed(s)) {
s->s3->in_read_app_data = 2;
return (-1);
} else {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_UNEXPECTED_RECORD);
goto f_err;
}
}
/* not reached */
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
return (-1);
}
int dtls1_process_heartbeat(SSL *s, unsigned char *p, unsigned int length)
{
unsigned char *pl;
unsigned short hbtype;
unsigned int payload;
unsigned int padding = 16; /* Use minimum padding */
if (s->msg_callback)
s->msg_callback(0, s->version, DTLS1_RT_HEARTBEAT,
p, length, s, s->msg_callback_arg);
/* Read type and payload length */
if (HEARTBEAT_SIZE_STD(0) > length)
return 0; /* silently discard */
if (length > SSL3_RT_MAX_PLAIN_LENGTH)
return 0; /* silently discard per RFC 6520 sec. 4 */
hbtype = *p++;
n2s(p, payload);
if (HEARTBEAT_SIZE_STD(payload) > length)
return 0; /* silently discard per RFC 6520 sec. 4 */
pl = p;
if (hbtype == TLS1_HB_REQUEST) {
unsigned char *buffer, *bp;
unsigned int write_length = HEARTBEAT_SIZE(payload, padding);
int r;
if (write_length > SSL3_RT_MAX_PLAIN_LENGTH)
return 0;
/* Allocate memory for the response. */
buffer = OPENSSL_malloc(write_length);
if (buffer == NULL)
return -1;
bp = buffer;
/* Enter response type, length and copy payload */
*bp++ = TLS1_HB_RESPONSE;
s2n(payload, bp);
memcpy(bp, pl, payload);
bp += payload;
/* Random padding */
if (RAND_bytes(bp, padding) <= 0) {
OPENSSL_free(buffer);
return -1;
}
r = dtls1_write_bytes(s, DTLS1_RT_HEARTBEAT, buffer, write_length);
if (r >= 0 && s->msg_callback)
s->msg_callback(1, s->version, DTLS1_RT_HEARTBEAT,
buffer, write_length, s, s->msg_callback_arg);
OPENSSL_free(buffer);
if (r < 0)
return r;
} else if (hbtype == TLS1_HB_RESPONSE) {
unsigned int seq;
/*
* We only send sequence numbers (2 bytes unsigned int), and 16
* random bytes, so we just try to read the sequence number
*/
n2s(pl, seq);
if (payload == 18 && seq == s->tlsext_hb_seq) {
dtls1_stop_timer(s);
s->tlsext_hb_seq++;
s->tlsext_hb_pending = 0;
}
}
return 0;
}
