static int ssl23_client_hello(SSL *s)
{
unsigned char *buf;
unsigned char *p,*d;
int i,ch_len;
unsigned long l;
int ssl2_compat;
int version = 0, version_major, version_minor;
#ifndef OPENSSL_NO_COMP
int j;
SSL_COMP *comp;
#endif
int ret;
unsigned long mask, options = s->options;
ssl2_compat = (options & SSL_OP_NO_SSLv2) ? 0 : 1;
if (ssl2_compat && ssl23_no_ssl2_ciphers(s))
ssl2_compat = 0;
/*
* SSL_OP_NO_X disables all protocols above X *if* there are
* some protocols below X enabled. This is required in order
* to maintain "version capability" vector contiguous. So
* that if application wants to disable TLS1.0 in favour of
* TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
* answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
*/
mask = SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1
#if !defined(OPENSSL_NO_SSL3)
|SSL_OP_NO_SSLv3
#endif
#if !defined(OPENSSL_NO_SSL2)
|(ssl2_compat?SSL_OP_NO_SSLv2:0)
#endif
;
#if !defined(OPENSSL_NO_TLS1_2_CLIENT)
version = TLS1_2_VERSION;
if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask)
version = TLS1_1_VERSION;
#else
version = TLS1_1_VERSION;
#endif
mask &= ~SSL_OP_NO_TLSv1_1;
if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
version = TLS1_VERSION;
mask &= ~SSL_OP_NO_TLSv1;
#if !defined(OPENSSL_NO_SSL3)
if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
version = SSL3_VERSION;
mask &= ~SSL_OP_NO_SSLv3;
#endif
#if !defined(OPENSSL_NO_SSL2)
if ((options & SSL_OP_NO_SSLv3) && (options & mask) != mask)
version = SSL2_VERSION;
#endif
#ifndef OPENSSL_NO_TLSEXT
if (version != SSL2_VERSION)
{
/* have to disable SSL 2.0 compatibility if we need TLS extensions */
if (s->tlsext_hostname != NULL)
ssl2_compat = 0;
if (s->tlsext_status_type != -1)
ssl2_compat = 0;
#ifdef TLSEXT_TYPE_opaque_prf_input
if (s->ctx->tlsext_opaque_prf_input_callback != 0 || s->tlsext_opaque_prf_input != NULL)
ssl2_compat = 0;
#endif
}
#endif
buf=(unsigned char *)s->init_buf->data;
if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
{
#if 0
/* don't reuse session-id's */
if (!ssl_get_new_session(s,0))
{
return(-1);
}
#endif
p=s->s3->client_random;
if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
return -1;
if (version == TLS1_2_VERSION)
{
version_major = TLS1_2_VERSION_MAJOR;
version_minor = TLS1_2_VERSION_MINOR;
}
else if (version == TLS1_1_VERSION)
{
version_major = TLS1_1_VERSION_MAJOR;
version_minor = TLS1_1_VERSION_MINOR;
}
else if (version == TLS1_VERSION)
{
version_major = TLS1_VERSION_MAJOR;
version_minor = TLS1_VERSION_MINOR;
}
#ifdef OPENSSL_FIPS
else if(FIPS_mode())
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,
SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
return -1;
}
#endif
else if (version == SSL3_VERSION)
{
version_major = SSL3_VERSION_MAJOR;
version_minor = SSL3_VERSION_MINOR;
}
else if (version == SSL2_VERSION)
{
version_major = SSL2_VERSION_MAJOR;
version_minor = SSL2_VERSION_MINOR;
}
else
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
return(-1);
}
s->client_version = version;
if (ssl2_compat)
{
/* create SSL 2.0 compatible Client Hello */
/* two byte record header will be written last */
d = &(buf[2]);
p = d + 9; /* leave space for message type, version, individual length fields */
*(d++) = SSL2_MT_CLIENT_HELLO;
*(d++) = version_major;
*(d++) = version_minor;
/* Ciphers supported */
i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0);
if (i == 0)
{
/* no ciphers */
SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
return -1;
}
s2n(i,d);
p+=i;
/* put in the session-id length (zero since there is no reuse) */
#if 0
s->session->session_id_length=0;
#endif
s2n(0,d);
if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
ch_len=SSL2_CHALLENGE_LENGTH;
else
ch_len=SSL2_MAX_CHALLENGE_LENGTH;
/* write out sslv2 challenge */
/* Note that ch_len must be <= SSL3_RANDOM_SIZE (32),
because it is one of SSL2_MAX_CHALLENGE_LENGTH (32)
or SSL2_MAX_CHALLENGE_LENGTH (16), but leave the
check in for futurproofing */
if (SSL3_RANDOM_SIZE < ch_len)
i=SSL3_RANDOM_SIZE;
else
i=ch_len;
s2n(i,d);
memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0)
return -1;
memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
p+=i;
i= p- &(buf[2]);
buf[0]=((i>>8)&0xff)|0x80;
buf[1]=(i&0xff);
/* number of bytes to write */
s->init_num=i+2;
s->init_off=0;
ssl3_finish_mac(s,&(buf[2]),i);
}
else
{
/* create Client Hello in SSL 3.0/TLS 1.0 format */
/* do the record header (5 bytes) and handshake message
* header (4 bytes) last. Note: the code to add the
* padding extension in t1_lib.c depends on the size of
* this prefix. */
d = p = &(buf[9]);
*(p++) = version_major;
*(p++) = version_minor;
/* Random stuff */
memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
p += SSL3_RANDOM_SIZE;
/* Session ID (zero since there is no reuse) */
*(p++) = 0;
/* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
if (i == 0)
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
return -1;
}
#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
/* Some servers hang if client hello > 256 bytes
* as hack workaround chop number of supported ciphers
* to keep it well below this if we use TLS v1.2
*/
if (TLS1_get_version(s) >= TLS1_2_VERSION
&& i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
#endif
s2n(i,p);
p+=i;
/* COMPRESSION */
#ifdef OPENSSL_NO_COMP
*(p++)=1;
#else
if ((s->options & SSL_OP_NO_COMPRESSION)
|| !s->ctx->comp_methods)
j=0;
else
j=sk_SSL_COMP_num(s->ctx->comp_methods);
*(p++)=1+j;
for (i=0; i<j; i++)
{
comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
*(p++)=comp->id;
}
#endif
*(p++)=0; /* Add the NULL method */
#ifndef OPENSSL_NO_TLSEXT
/* TLS extensions*/
if (ssl_prepare_clienthello_tlsext(s) <= 0)
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
return -1;
}
if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
return -1;
}
#endif
l = p-d;
/* fill in 4-byte handshake header */
d=&(buf[5]);
*(d++)=SSL3_MT_CLIENT_HELLO;
l2n3(l,d);
l += 4;
if (l > SSL3_RT_MAX_PLAIN_LENGTH)
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
return -1;
}
/* fill in 5-byte record header */
d=buf;
*(d++) = SSL3_RT_HANDSHAKE;
*(d++) = version_major;
/* Some servers hang if we use long client hellos
* and a record number > TLS 1.0.
*/
if (TLS1_get_client_version(s) > TLS1_VERSION)
*(d++) = 1;
else
*(d++) = version_minor;
s2n((int)l,d);
/* number of bytes to write */
s->init_num=p-buf;
s->init_off=0;
ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
}
s->state=SSL23_ST_CW_CLNT_HELLO_B;
s->init_off=0;
}
/* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
*
* Returns:
* 0: (in non-constant time) if the record is publically invalid (i.e. too
* short etc).
* 1: if the record's padding is valid / the encryption was successful.
* -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
* an internal error occured.
*/
int tls1_enc(SSL *s, int send)
{
SSL3_RECORD *rec;
EVP_CIPHER_CTX *ds;
unsigned long l;
int bs,i,j,k,pad=0,ret,mac_size=0;
const EVP_CIPHER *enc;
if (send)
{
if (EVP_MD_CTX_md(s->write_hash))
{
int n=EVP_MD_CTX_size(s->write_hash);
OPENSSL_assert(n >= 0);
}
ds=s->enc_write_ctx;
rec= &(s->s3->wrec);
if (s->enc_write_ctx == NULL)
enc=NULL;
else
{
int ivlen;
enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
/* For TLSv1.1 and later explicit IV */
if (s->version >= TLS1_1_VERSION
&& EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
ivlen = EVP_CIPHER_iv_length(enc);
else
ivlen = 0;
if (ivlen > 1)
{
if ( rec->data != rec->input)
/* we can't write into the input stream:
* Can this ever happen?? (steve)
*/
fprintf(stderr,
"%s:%d: rec->data != rec->input\n",
__FILE__, __LINE__);
else if (RAND_bytes(rec->input, ivlen) <= 0)
return -1;
}
}
}
else
{
if (EVP_MD_CTX_md(s->read_hash))
{
int n=EVP_MD_CTX_size(s->read_hash);
OPENSSL_assert(n >= 0);
}
ds=s->enc_read_ctx;
rec= &(s->s3->rrec);
if (s->enc_read_ctx == NULL)
enc=NULL;
else
enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
}
#ifdef KSSL_DEBUG
printf("tls1_enc(%d)\n", send);
#endif /* KSSL_DEBUG */
if ((s->session == NULL) || (ds == NULL) || (enc == NULL))
{
memmove(rec->data,rec->input,rec->length);
rec->input=rec->data;
ret = 1;
}
else
{
l=rec->length;
bs=EVP_CIPHER_block_size(ds->cipher);
if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER)
{
unsigned char buf[13],*seq;
seq = send?s->s3->write_sequence:s->s3->read_sequence;
if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
{
unsigned char dtlsseq[9],*p=dtlsseq;
s2n(send?s->d1->w_epoch:s->d1->r_epoch,p);
memcpy(p,&seq[2],6);
memcpy(buf,dtlsseq,8);
}
else
{
memcpy(buf,seq,8);
for (i=7; i>=0; i--) /* increment */
{
++seq[i];
if (seq[i] != 0) break;
}
}
buf[8]=rec->type;
buf[9]=(unsigned char)(s->version>>8);
buf[10]=(unsigned char)(s->version);
buf[11]=rec->length>>8;
buf[12]=rec->length&0xff;
pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf);
if (send)
{
l+=pad;
rec->length+=pad;
}
}
else if ((bs != 1) && send)
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;
}
int dtls1_heartbeat(SSL *s)
{
unsigned char *buf, *p;
int ret = -1;
unsigned int payload = 18; /* Sequence number + random bytes */
unsigned int padding = 16; /* Use minimum padding */
unsigned int size;
/* Only send if peer supports and accepts HB requests... */
if (!(s->tlsext_heartbeat & SSL_DTLSEXT_HB_ENABLED) ||
s->tlsext_heartbeat & SSL_DTLSEXT_HB_DONT_SEND_REQUESTS) {
SSLerr(SSL_F_DTLS1_HEARTBEAT, SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT);
return -1;
}
/* ...and there is none in flight yet... */
if (s->tlsext_hb_pending) {
SSLerr(SSL_F_DTLS1_HEARTBEAT, SSL_R_TLS_HEARTBEAT_PENDING);
return -1;
}
/* ...and no handshake in progress. */
if (SSL_in_init(s) || ossl_statem_get_in_handshake(s)) {
SSLerr(SSL_F_DTLS1_HEARTBEAT, SSL_R_UNEXPECTED_MESSAGE);
return -1;
}
/*-
* Create HeartBeat message, we just use a sequence number
* as payload to distinguish different messages and add
* some random stuff.
*/
size = HEARTBEAT_SIZE(payload, padding);
buf = OPENSSL_malloc(size);
if (buf == NULL) {
SSLerr(SSL_F_DTLS1_HEARTBEAT, ERR_R_MALLOC_FAILURE);
return -1;
}
p = buf;
/* Message Type */
*p++ = TLS1_HB_REQUEST;
/* Payload length (18 bytes here) */
s2n(payload, p);
/* Sequence number */
s2n(s->tlsext_hb_seq, p);
/* 16 random bytes */
if (RAND_bytes(p, 16) <= 0) {
SSLerr(SSL_F_DTLS1_HEARTBEAT, ERR_R_INTERNAL_ERROR);
goto err;
}
p += 16;
/* Random padding */
if (RAND_bytes(p, padding) <= 0) {
SSLerr(SSL_F_DTLS1_HEARTBEAT, ERR_R_INTERNAL_ERROR);
goto err;
}
ret = dtls1_write_bytes(s, DTLS1_RT_HEARTBEAT, buf, size);
if (ret >= 0) {
if (s->msg_callback)
s->msg_callback(1, s->version, DTLS1_RT_HEARTBEAT,
buf, size, s, s->msg_callback_arg);
dtls1_start_timer(s);
s->tlsext_hb_pending = 1;
}
err:
OPENSSL_free(buf);
return ret;
}
int f_char(oprtype *a, opctype op)
{
triple *root, *last, *curr;
oprtype argv[CHARMAXARGS], *argp;
mval v;
bool all_lits;
char *c;
int argc, i;
error_def(ERR_FCHARMAXARGS);
all_lits = TRUE;
argp = &argv[0];
argc = 0;
for (;;)
{
if (!intexpr(argp))
return FALSE;
assert(argp->oprclass == TRIP_REF);
if (argp->oprval.tref->opcode != OC_ILIT)
all_lits = FALSE;
argc++;
argp++;
if (window_token != TK_COMMA)
break;
advancewindow();
if (argc >= CHARMAXARGS)
{ stx_error(ERR_FCHARMAXARGS);
return FALSE;
}
}
if (all_lits)
{
if (stringpool.top - stringpool.free < argc)
stp_gcol(argc);
v.mvtype = MV_STR;
v.str.addr = c = (char *) stringpool.free;
argp = &argv[0];
for (; argc > 0 ;argc--, argp++)
{
i = argp->oprval.tref->operand[0].oprval.ilit;
if ((i >= 0) && (i < 256)) /* only true for single byte character set */
*c++ = i;
}
v.str.len = c - v.str.addr;
stringpool.free =(unsigned char *) c;
s2n(&v);
*a = put_lit(&v);
return TRUE;
}
root = maketriple(op);
root->operand[0] = put_ilit(argc + 2);
curr = newtriple(OC_PARAMETER);
curr->operand[0] = put_ilit(0);
root->operand[1] = put_tref(curr);
last = curr;
argp = &argv[0];
for (; argc > 0 ;argc--, argp++)
{
curr = newtriple(OC_PARAMETER);
curr->operand[0] = *argp;
last->operand[1] = put_tref(curr);
last = curr;
}
ins_triple(root);
*a = put_tref(root);
return TRUE;
}
static int
ssl23_client_hello(SSL *s)
{
unsigned char *buf;
unsigned char *p, *d;
int i;
unsigned long l;
int version = 0, version_major, version_minor;
#ifndef OPENSSL_NO_COMP
int j;
SSL_COMP *comp;
#endif
int ret;
unsigned long mask, options = s->options;
/*
* SSL_OP_NO_X disables all protocols above X *if* there are
* some protocols below X enabled. This is required in order
* to maintain "version capability" vector contiguous. So
* that if application wants to disable TLS1.0 in favour of
* TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
* answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
*/
mask = SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3;
#if !defined(OPENSSL_NO_TLS1_2_CLIENT)
version = TLS1_2_VERSION;
if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask)
version = TLS1_1_VERSION;
#else
version = TLS1_1_VERSION;
#endif
mask &= ~SSL_OP_NO_TLSv1_1;
if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
version = TLS1_VERSION;
mask &= ~SSL_OP_NO_TLSv1;
if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
version = SSL3_VERSION;
mask &= ~SSL_OP_NO_SSLv3;
buf = (unsigned char *)s->init_buf->data;
if (s->state == SSL23_ST_CW_CLNT_HELLO_A) {
#if 0
/* don't reuse session-id's */
if (!ssl_get_new_session(s, 0)) {
return (-1);
}
#endif
p = s->s3->client_random;
if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
return -1;
if (version == TLS1_2_VERSION) {
version_major = TLS1_2_VERSION_MAJOR;
version_minor = TLS1_2_VERSION_MINOR;
} else if (version == TLS1_1_VERSION) {
version_major = TLS1_1_VERSION_MAJOR;
version_minor = TLS1_1_VERSION_MINOR;
} else if (version == TLS1_VERSION) {
version_major = TLS1_VERSION_MAJOR;
version_minor = TLS1_VERSION_MINOR;
} else if (version == SSL3_VERSION) {
version_major = SSL3_VERSION_MAJOR;
version_minor = SSL3_VERSION_MINOR;
} else {
SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_PROTOCOLS_AVAILABLE);
return (-1);
}
s->client_version = version;
/* create Client Hello in SSL 3.0/TLS 1.0 format */
/*
* Do the record header (5 bytes) and handshake
* message header (4 bytes) last
*/
d = p = &(buf[9]);
*(p++) = version_major;
*(p++) = version_minor;
/* Random stuff */
memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
p += SSL3_RANDOM_SIZE;
/* Session ID (zero since there is no reuse) */
*(p++) = 0;
/* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]),
ssl3_put_cipher_by_char);
if (i == 0) {
SSLerr(SSL_F_SSL23_CLIENT_HELLO,
SSL_R_NO_CIPHERS_AVAILABLE);
return -1;
}
#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
/*
* Some servers hang if client hello > 256 bytes
* as hack workaround chop number of supported ciphers
* to keep it well below this if we use TLS v1.2
*/
if (TLS1_get_version(s) >= TLS1_2_VERSION &&
i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
#endif
s2n(i, p);
p += i;
/* COMPRESSION */
#ifdef OPENSSL_NO_COMP
*(p++) = 1;
#else
if ((s->options & SSL_OP_NO_COMPRESSION) ||
!s->ctx->comp_methods)
j = 0;
else
j = sk_SSL_COMP_num(s->ctx->comp_methods);
*(p++) = 1 + j;
for (i = 0; i < j; i++) {
comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
*(p++) = comp->id;
}
#endif
/* Add the NULL method */
*(p++) = 0;
#ifndef OPENSSL_NO_TLSEXT
/* TLS extensions*/
if (ssl_prepare_clienthello_tlsext(s) <= 0) {
SSLerr(SSL_F_SSL23_CLIENT_HELLO,
SSL_R_CLIENTHELLO_TLSEXT);
return -1;
}
if ((p = ssl_add_clienthello_tlsext(s, p,
buf + SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) {
SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
return -1;
}
#endif
l = p - d;
/* fill in 4-byte handshake header */
d = &(buf[5]);
*(d++) = SSL3_MT_CLIENT_HELLO;
l2n3(l, d);
l += 4;
if (l > SSL3_RT_MAX_PLAIN_LENGTH) {
SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
return -1;
}
/* fill in 5-byte record header */
d = buf;
*(d++) = SSL3_RT_HANDSHAKE;
*(d++) = version_major;
/*
* Some servers hang if we use long client hellos
* and a record number > TLS 1.0.
*/
if (TLS1_get_client_version(s) > TLS1_VERSION)
*(d++) = 1;
else
*(d++) = version_minor;
s2n((int)l, d);
/* number of bytes to write */
s->init_num = p - buf;
s->init_off = 0;
ssl3_finish_mac(s, &(buf[5]), s->init_num - 5);
s->state = SSL23_ST_CW_CLNT_HELLO_B;
s->init_off = 0;
}
/* SSL3_ST_CW_CLNT_HELLO_B */
ret = ssl23_write_bytes(s);
if ((ret >= 2) && s->msg_callback) {
/* Client Hello has been sent; tell msg_callback */
s->msg_callback(1, version, SSL3_RT_HANDSHAKE,
s->init_buf->data + 5, ret - 5, s, s->msg_callback_arg);
}
return ret;
}
int
dtls1_client_hello(SSL *s)
{
unsigned char *buf;
unsigned char *p, *d;
unsigned int i;
unsigned long l;
buf = (unsigned char *)s->init_buf->data;
if (s->state == SSL3_ST_CW_CLNT_HELLO_A) {
SSL_SESSION *sess = s->session;
if ((s->session == NULL) ||
(s->session->ssl_version != s->version) ||
(!sess->session_id_length && !sess->tlsext_tick) ||
(s->session->not_resumable)) {
if (!ssl_get_new_session(s, 0))
goto err;
}
/* else use the pre-loaded session */
p = s->s3->client_random;
/* if client_random is initialized, reuse it, we are
* required to use same upon reply to HelloVerify */
for (i = 0; p[i]=='\0' && i < sizeof(s->s3->client_random); i++)
;
if (i == sizeof(s->s3->client_random))
arc4random_buf(p, sizeof(s->s3->client_random));
/* Do the message type and length last */
d = p = &(buf[DTLS1_HM_HEADER_LENGTH]);
*(p++) = s->version >> 8;
*(p++) = s->version&0xff;
s->client_version = s->version;
/* Random stuff */
memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
p += SSL3_RANDOM_SIZE;
/* Session ID */
if (s->new_session)
i = 0;
else
i = s->session->session_id_length;
*(p++) = i;
if (i != 0) {
if (i > sizeof s->session->session_id) {
SSLerr(SSL_F_DTLS1_CLIENT_HELLO,
ERR_R_INTERNAL_ERROR);
goto err;
}
memcpy(p, s->session->session_id, i);
p += i;
}
/* cookie stuff */
if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
goto err;
}
*(p++) = s->d1->cookie_len;
memcpy(p, s->d1->cookie, s->d1->cookie_len);
p += s->d1->cookie_len;
/* Ciphers supported */
i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &p[2]);
if (i == 0) {
SSLerr(SSL_F_DTLS1_CLIENT_HELLO,
SSL_R_NO_CIPHERS_AVAILABLE);
goto err;
}
s2n(i, p);
p += i;
/* add in (no) COMPRESSION */
*(p++) = 1;
*(p++) = 0; /* Add the NULL method */
if ((p = ssl_add_clienthello_tlsext(s, p,
buf + SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) {
SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
goto err;
}
l = (p - d);
d = buf;
d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO,
l, 0, l);
s->state = SSL3_ST_CW_CLNT_HELLO_B;
/* number of bytes to write */
s->init_num = p - buf;
s->init_off = 0;
/* buffer the message to handle re-xmits */
dtls1_buffer_message(s, 0);
}
static int ssl23_client_hello(SSL *s)
{
unsigned char *buf;
unsigned char *p,*d;
int i,j,ch_len;
unsigned long Time,l;
int ssl2_compat;
int version = 0, version_major, version_minor;
SSL_COMP *comp;
int ret;
ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;
if (!(s->options & SSL_OP_NO_TLSv1))
{
version = TLS1_VERSION;
}
else if (!(s->options & SSL_OP_NO_SSLv3))
{
version = SSL3_VERSION;
}
else if (!(s->options & SSL_OP_NO_SSLv2))
{
version = SSL2_VERSION;
}
#ifndef OPENSSL_NO_TLSEXT
if (version != SSL2_VERSION)
{
/* have to disable SSL 2.0 compatibility if we need TLS extensions */
if (s->tlsext_hostname != NULL)
ssl2_compat = 0;
}
#endif
buf=(unsigned char *)s->init_buf->data;
if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
{
#if 0
/* don't reuse session-id's */
if (!ssl_get_new_session(s,0))
{
return(-1);
}
#endif
p=s->s3->client_random;
Time=(unsigned long)time(NULL); /* Time */
l2n(Time,p);
if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
return -1;
if (version == TLS1_VERSION)
{
version_major = TLS1_VERSION_MAJOR;
version_minor = TLS1_VERSION_MINOR;
}
else if (version == SSL3_VERSION)
{
version_major = SSL3_VERSION_MAJOR;
version_minor = SSL3_VERSION_MINOR;
}
else if (version == SSL2_VERSION)
{
version_major = SSL2_VERSION_MAJOR;
version_minor = SSL2_VERSION_MINOR;
}
else
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
return(-1);
}
s->client_version = version;
if (ssl2_compat)
{
/* create SSL 2.0 compatible Client Hello */
/* two byte record header will be written last */
d = &(buf[2]);
p = d + 9; /* leave space for message type, version, individual length fields */
*(d++) = SSL2_MT_CLIENT_HELLO;
*(d++) = version_major;
*(d++) = version_minor;
/* Ciphers supported */
i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0);
if (i == 0)
{
/* no ciphers */
SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
return -1;
}
s2n(i,d);
p+=i;
/* put in the session-id length (zero since there is no reuse) */
#if 0
s->session->session_id_length=0;
#endif
s2n(0,d);
if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
ch_len=SSL2_CHALLENGE_LENGTH;
else
ch_len=SSL2_MAX_CHALLENGE_LENGTH;
/* write out sslv2 challenge */
if (SSL3_RANDOM_SIZE < ch_len)
i=SSL3_RANDOM_SIZE;
else
i=ch_len;
s2n(i,d);
memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0)
return -1;
memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
p+=i;
i= p- &(buf[2]);
buf[0]=((i>>8)&0xff)|0x80;
buf[1]=(i&0xff);
/* number of bytes to write */
s->init_num=i+2;
s->init_off=0;
ssl3_finish_mac(s,&(buf[2]),i);
}
else
{
/* create Client Hello in SSL 3.0/TLS 1.0 format */
/* do the record header (5 bytes) and handshake message header (4 bytes) last */
d = p = &(buf[9]);
*(p++) = version_major;
*(p++) = version_minor;
/* Random stuff */
memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
p += SSL3_RANDOM_SIZE;
/* Session ID (zero since there is no reuse) */
*(p++) = 0;
/* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
if (i == 0)
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
return -1;
}
s2n(i,p);
p+=i;
/* COMPRESSION */
if (s->ctx->comp_methods == NULL)
j=0;
else
j=sk_SSL_COMP_num(s->ctx->comp_methods);
*(p++)=1+j;
for (i=0; i<j; i++)
{
comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
*(p++)=comp->id;
}
*(p++)=0; /* Add the NULL method */
#ifndef OPENSSL_NO_TLSEXT
if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
return -1;
}
#endif
l = p-d;
*p = 42;
/* fill in 4-byte handshake header */
d=&(buf[5]);
*(d++)=SSL3_MT_CLIENT_HELLO;
l2n3(l,d);
l += 4;
if (l > SSL3_RT_MAX_PLAIN_LENGTH)
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
return -1;
}
/* fill in 5-byte record header */
d=buf;
*(d++) = SSL3_RT_HANDSHAKE;
*(d++) = version_major;
*(d++) = version_minor; /* arguably we should send the *lowest* suported version here
* (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */
s2n((int)l,d);
/* number of bytes to write */
s->init_num=p-buf;
s->init_off=0;
ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
}
s->state=SSL23_ST_CW_CLNT_HELLO_B;
s->init_off=0;
}
int tls1_mac(SSL *ssl, unsigned char *md, int send)
{
SSL3_RECORD *rec;
unsigned char *mac_sec,*seq;
const EVP_MD *hash;
unsigned int md_size;
int i;
HMAC_CTX hmac;
unsigned char buf[5];
if (send)
{
rec= &(ssl->s3->wrec);
mac_sec= &(ssl->s3->write_mac_secret[0]);
seq= &(ssl->s3->write_sequence[0]);
hash=ssl->write_hash;
}
else
{
rec= &(ssl->s3->rrec);
mac_sec= &(ssl->s3->read_mac_secret[0]);
seq= &(ssl->s3->read_sequence[0]);
hash=ssl->read_hash;
}
md_size=EVP_MD_size(hash);
buf[0]=rec->type;
if (ssl->version == DTLS1_VERSION && ssl->client_version == DTLS1_BAD_VER)
{
buf[1]=TLS1_VERSION_MAJOR;
buf[2]=TLS1_VERSION_MINOR;
}
else {
buf[1]=(unsigned char)(ssl->version>>8);
buf[2]=(unsigned char)(ssl->version);
}
buf[3]=rec->length>>8;
buf[4]=rec->length&0xff;
/* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
HMAC_CTX_init(&hmac);
HMAC_Init_ex(&hmac,mac_sec,EVP_MD_size(hash),hash,NULL);
if (ssl->version == DTLS1_BAD_VER ||
(ssl->version == DTLS1_VERSION && ssl->client_version != DTLS1_BAD_VER))
{
unsigned char dtlsseq[8],*p=dtlsseq;
s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
memcpy (p,&seq[2],6);
HMAC_Update(&hmac,dtlsseq,8);
}
else
HMAC_Update(&hmac,seq,8);
HMAC_Update(&hmac,buf,5);
HMAC_Update(&hmac,rec->input,rec->length);
HMAC_Final(&hmac,md,&md_size);
HMAC_CTX_cleanup(&hmac);
#ifdef TLS_DEBUG
printf("sec=");
{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
printf("seq=");
{int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
printf("buf=");
{int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
printf("rec=");
{unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
#endif
if ( SSL_version(ssl) != DTLS1_VERSION && SSL_version(ssl) != DTLS1_BAD_VER)
{
for (i=7; i>=0; i--)
{
++seq[i];
if (seq[i] != 0) break;
}
}
#ifdef TLS_DEBUG
{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
#endif
return(md_size);
}
unsigned char *mval2subsc(mval *in_val, gv_key *out_key, boolean_t std_null_coll)
{
boolean_t is_negative;
unsigned char buf1[MAX_KEY_SZ + 1], ch, *cvt_table, *in_ptr, *out_ptr;
unsigned char *tm, temp_mantissa[NUM_DEC_DG_2L / 2 + 3]; /* Need 1 byte for each two digits. Add 3 bytes slop */
mstr mstr_ch, mstr_buf1;
int4 mt, mw, mx;
uint4 mvt; /* Local copy of mvtype, bit ands use a int4, so do conversion once */
unsigned int digs, exp_val;
int tmp_len, avail_bytes;
DCL_THREADGBL_ACCESS;
SETUP_THREADGBL_ACCESS;
/* The below assert is an attempt to catch between some and many of the cases where the mvtype is
* not an accurate representation of the content. This can happen (and has) when there is a bug in
* op_svput() where only the string portion of an mval is set without (re)setting the type leading
* to numeric or num-approx values that do not represent reality and causing trouble especially with
* subscripts. In that example, "-1" was left as a string with MV_NUM_APPROX on which caused a lot
* of trouble with $ORDER in a database when -1 was treated as a string. This assert is not a 100%
* catchall of invalid settings but it provides at least some barrier. A full barrier would require
* complete conversion which is a bit expensive to always re-do at this point - even in a dbg version.
* There is an exception though and that is if the caller is op_fnview. In that case, it could set
* MV_NUM_APPROX to indicate a number needs to be treated as a string subscript. Skip that in the assert.
*/
assert(!(MV_NUM_APPROX & in_val->mvtype) || (NUM_DEC_DG_2L < in_val->str.len) || !val_iscan(in_val)
|| TREF(skip_mv_num_approx_assert));
out_ptr = out_key->base + out_key->end;
if (TREF(transform) && gv_target->nct)
{
MV_FORCE_STR(in_val);
mvt = in_val->mvtype | MV_NUM_APPROX;
} else
mvt = (uint4)in_val->mvtype;
if (!(mvt & (MV_NM | MV_NUM_APPROX)))
{ /* Not currently in numeric form. Is it cannonical? */
if (val_iscan(in_val))
{ /* Yes, convert it to numeric */
(void)s2n(in_val);
mvt = in_val->mvtype;
assert(mvt & MV_NM);
} else
{ /* No, not numeric. Note the fact for future reference */
mvt = in_val->mvtype |= MV_NUM_APPROX;
}
}
if (mvt & MV_NUM_APPROX)
{ /* It's a string */
in_ptr = (unsigned char *)in_val->str.addr;
tmp_len = in_val->str.len;
if (TREF(transform) && gv_target->collseq)
{
mstr_ch.len = tmp_len;
mstr_ch.addr = (char *)in_ptr;
mstr_buf1.len = SIZEOF(buf1);
mstr_buf1.addr = (char *)buf1;
do_xform(gv_target->collseq, XFORM, &mstr_ch, &mstr_buf1, &tmp_len);
in_ptr = (unsigned char*)mstr_buf1.addr; /* mstr_buf1.addr is used just in case it is
reallocated by the XFORM routine */
}
/* Find out how much space is needed at a minimum to store the subscript representation of this string.
* That would be STR_SUB_PREFIX + input string + at most TWO KEY_DELIMITER.
* Assuming this, compute how much space would still be available in the out_key before reaching the top.
* If this is negative, we have to signal a GVSUBOFLOW error.
* If this is positive and the input string contains 0x00 or 0x01, we would need additional bytes to
* store the STR_SUB_ESCAPE byte. Decrement the available space until it becomes zero
* at which point issue a GVSUBOFLOW error as well.
*/
avail_bytes = out_key->top - (out_key->end + tmp_len + 3);
if (0 > avail_bytes)
ISSUE_GVSUBOFLOW_ERROR(out_key, KEY_COMPLETE_FALSE);
if (0 < tmp_len)
{
*out_ptr++ = STR_SUB_PREFIX;
do
{
ch = *in_ptr++;
if (ch <= 1)
{
*out_ptr++ = STR_SUB_ESCAPE;
if (0 > --avail_bytes)
{
/* Ensure input key to format_targ_key is double null terminated */
assert(STR_SUB_PREFIX == out_key->base[out_key->end]);
out_key->base[out_key->end] = KEY_DELIMITER;
ISSUE_GVSUBOFLOW_ERROR(out_key, KEY_COMPLETE_FALSE);
}
ch++; /* promote character */
}
*out_ptr++ = ch;
} while (--tmp_len > 0);
} else
*out_ptr++ = (0 == std_null_coll) ? STR_SUB_PREFIX : SUBSCRIPT_STDCOL_NULL;
goto ALLDONE;
}
/* Its a number, is it an integer? But before this assert that we have enough allocated space in the key
* to store the maximum possible numeric subscript and two terminating 0s at the end of the key */
assert((MAX_GVKEY_PADDING_LEN + 1) <= (int)(out_key->top - out_key->end));
if (mvt & MV_INT)
{ /* Yes, its an integer, convert it */
is_negative = FALSE;
cvt_table = pos_code;
if (0 > (mt = in_val->m[1]))
{
is_negative = TRUE;
cvt_table = neg_code;
mt = -mt;
} else if (0 == mt)
{
*out_ptr++ = SUBSCRIPT_ZERO;
goto ALLDONE;
}
if (10 > mt)
{
*out_ptr++ = is_negative ? ~(SUBSCRIPT_BIAS - 2) : (SUBSCRIPT_BIAS - 2);
*out_ptr++ = cvt_table[mt * 10];
goto FINISH_NUMBER;
}
if (100 > mt)
{
*out_ptr++ = is_negative ? ~(SUBSCRIPT_BIAS - 1) : (SUBSCRIPT_BIAS - 1);
*out_ptr++ = cvt_table[mt];
goto FINISH_NUMBER;
}
tm = temp_mantissa;
if (1000 > mt)
{
exp_val = SUBSCRIPT_BIAS;
goto ODD_INTEGER;
}
if (10000 > mt)
{
exp_val = SUBSCRIPT_BIAS + 1;
goto EVEN_INTEGER;
}
if (100000 > mt)
{
exp_val = SUBSCRIPT_BIAS + 2;
goto ODD_INTEGER;
}
if (1000000 > mt)
{
exp_val = SUBSCRIPT_BIAS + 3;
goto EVEN_INTEGER;
}
if (10000000 > mt)
{
exp_val = SUBSCRIPT_BIAS + 4;
goto ODD_INTEGER;
}
if (100000000 > mt)
{
exp_val = SUBSCRIPT_BIAS + 5;
goto EVEN_INTEGER;
}
exp_val = SUBSCRIPT_BIAS + 6;
ODD_INTEGER:
*out_ptr++ = is_negative ? ~(exp_val) : (exp_val);
mw = mx = mt / 10;
mw *= 10;
mw = mt - mw;
mt = mx;
if (mw)
{
*tm++ = cvt_table[mw * 10];
goto FINISH_INTEGERS;
}
goto KEEP_STRIPING;
EVEN_INTEGER:
*out_ptr++ = is_negative ? ~(exp_val) : (exp_val);
KEEP_STRIPING:
while (mt)
{
mw = mx = mt / 100;
mw *= 100;
mw = mt - mw;
mt = mx;
if (mw)
{
*tm++ = cvt_table[mw];
break;
}
}
FINISH_INTEGERS:
while (mt)
{
mw = mx = mt / 100;
mw *= 100;
mw = mt - mw;
*tm++ = cvt_table[mw];
mt = mx;
}
while (tm > temp_mantissa)
*out_ptr++ = *--tm;
goto FINISH_NUMBER;
}
/* Convert 18 digit number */
cvt_table = pos_code;
if (0 != (is_negative = in_val->sgn))
cvt_table = neg_code;
*out_ptr++ = is_negative ? ~(in_val->e - MV_XBIAS + SUBSCRIPT_BIAS) : (in_val->e - MV_XBIAS + SUBSCRIPT_BIAS);
mt = in_val->m[1];
mw = in_val->m[0];
/* Strip top two digits */
mx = mt / (MANT_HI / 100);
*out_ptr++ = cvt_table[mx];
mt = (mt - (mx * (MANT_HI / 100))) * 100;
/*
* The two msd's have now been converted. The maximum number of
* data remaining is 7 digits in "mt" and 9 digits in "mw".
* If mw is zero, then we should just grind out mt till we are done
*/
if (0 == mw)
goto LAST_LONGWORD;
/* there are more than 7 digits left. First, we will put 8 digits in mt, (leaving 8 digits in mw) */
mx = mw / (MANT_HI / 10);
mt += mx * 10;
mw = (mw - (mx * (MANT_HI / 10))) * 10;
if (0 == mw)
goto LAST_LONGWORD;
for (digs = 0; digs < 4; digs++)
{
mx = mt / (MANT_HI / 100);
*out_ptr++ = cvt_table[mx];
mt = (mt - (mx * (MANT_HI / 100))) * 100;
}
mt = mw;
LAST_LONGWORD:
while (mt)
{
mx = mt / (MANT_HI / 100);
*out_ptr++ = cvt_table[mx];
mt = (mt - (mx * (MANT_HI / 100))) * 100;
}
FINISH_NUMBER:
if (is_negative)
*out_ptr++ = NEG_MNTSSA_END;
ALLDONE:
*out_ptr++ = KEY_DELIMITER;
*out_ptr = KEY_DELIMITER;
out_key->prev = out_key->end;
out_key->end = out_ptr - out_key->base;
/* Check if after adding the current subscript and the second terminating NULL byte, there is still
* MAX_GVKEY_PADDING_LEN bytes (allocated additionally as part of the DBKEYSIZE macro) left at the end.
* If not, we have overflown the original max-key-size length. Issue error.
*/
if ((MAX_GVKEY_PADDING_LEN + 1) > (int)(out_key->top - out_key->end))
ISSUE_GVSUBOFLOW_ERROR(out_key, KEY_COMPLETE_FALSE);
return out_ptr;
}
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 */
}
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_SSLv3))
{
s->version=SSL3_VERSION;
/* type=2; */
s->state=SSL23_ST_SR_CLNT_HELLO_B;
}
}
}
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 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 (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL))
{
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_VERSION_TOO_LOW);
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];
/* 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);
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) /* 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 == 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;
}
else
{
/* 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 rwformat(void)
{
int n;
mval key;
oprtype x;
triple *argcnt, *parm, *ref;
DCL_THREADGBL_ACCESS;
SETUP_THREADGBL_ACCESS;
ref = 0;
for (;;)
{
switch (TREF(window_token))
{
case TK_EXCLAIMATION:
n = 0;
do
{
n++;
advancewindow();
} while (TK_EXCLAIMATION == TREF(window_token));
ref = maketriple(OC_WTEOL);
ref->operand[0] = put_ilit(n);
ins_triple(ref);
break;
case TK_HASH:
advancewindow();
ref = newtriple(OC_WTFF);
break;
case TK_QUESTION:
advancewindow();
if (EXPR_FAIL == expr(&x, MUMPS_INT))
return FALSE;
ref = newtriple(OC_WTTAB);
ref->operand[0] = x;
return TRUE;
case TK_SLASH:
advancewindow();
if (TK_IDENT != TREF(window_token))
{
stx_error(ERR_CTLMNEXPECTED);
return FALSE;
}
assert(0 < (TREF(window_ident)).len);
key.mvtype = MV_STR;
key.str.len = (TREF(window_ident)).len;
key.str.addr = (TREF(window_ident)).addr;
s2n(&key);
s2pool(&(key.str));
argcnt = parm = newtriple(OC_PARAMETER);
parm->operand[0] = put_lit(&key);
advancewindow();
n = 1;
if (TK_LPAREN == TREF(window_token))
{
advancewindow();
for (;;)
{
if (EXPR_FAIL == expr(&x, MUMPS_EXPR))
return FALSE;
n++;
ref = newtriple(OC_PARAMETER);
ref->operand[0] = x;
parm->operand[1] = put_tref(ref);
parm = ref;
if (TK_RPAREN == TREF(window_token))
{
advancewindow();
break;
}
if (TK_COMMA != TREF(window_token))
{
stx_error(ERR_COMMAORRPAREXP);
return FALSE;
}
advancewindow();
}
}
ref = newtriple(OC_IOCONTROL);
ref->operand[0] = put_ilit(n);
ref->operand[1] = put_tref(argcnt);
return TRUE;
default:
if (ref)
return TRUE;
stx_error(ERR_RWFORMAT);
return FALSE;
}
}
}
int
dtls1_client_hello(SSL *s)
{
unsigned char *bufend, *d, *p;
unsigned int i;
if (s->state == SSL3_ST_CW_CLNT_HELLO_A) {
SSL_SESSION *sess = s->session;
if ((s->session == NULL) ||
(s->session->ssl_version != s->version) ||
(!sess->session_id_length && !sess->tlsext_tick) ||
(s->session->not_resumable)) {
if (!ssl_get_new_session(s, 0))
goto err;
}
/* else use the pre-loaded session */
p = s->s3->client_random;
/* if client_random is initialized, reuse it, we are
* required to use same upon reply to HelloVerify */
for (i = 0; p[i]=='\0' && i < sizeof(s->s3->client_random); i++)
;
if (i == sizeof(s->s3->client_random))
arc4random_buf(p, sizeof(s->s3->client_random));
d = p = ssl3_handshake_msg_start(s, SSL3_MT_CLIENT_HELLO);
*(p++) = s->version >> 8;
*(p++) = s->version&0xff;
s->client_version = s->version;
/* Random stuff */
memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
p += SSL3_RANDOM_SIZE;
/* Session ID */
if (s->new_session)
i = 0;
else
i = s->session->session_id_length;
*(p++) = i;
if (i != 0) {
if (i > sizeof s->session->session_id) {
SSLerr(SSL_F_DTLS1_CLIENT_HELLO,
ERR_R_INTERNAL_ERROR);
goto err;
}
memcpy(p, s->session->session_id, i);
p += i;
}
/* cookie stuff */
if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
goto err;
}
*(p++) = s->d1->cookie_len;
memcpy(p, s->d1->cookie, s->d1->cookie_len);
p += s->d1->cookie_len;
/* Ciphers supported */
i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &p[2]);
if (i == 0) {
SSLerr(SSL_F_DTLS1_CLIENT_HELLO,
SSL_R_NO_CIPHERS_AVAILABLE);
goto err;
}
s2n(i, p);
p += i;
/* add in (no) COMPRESSION */
*(p++) = 1;
*(p++) = 0; /* Add the NULL method */
bufend = (unsigned char *)s->init_buf->data +
SSL3_RT_MAX_PLAIN_LENGTH;
if ((p = ssl_add_clienthello_tlsext(s, p, bufend)) == NULL) {
SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
goto err;
}
ssl3_handshake_msg_finish(s, p - d);
s->state = SSL3_ST_CW_CLNT_HELLO_B;
}
static int client_hello(SSL *s)
{
unsigned char *buf;
unsigned char *p,*d;
/* CIPHER **cipher;*/
int i,n,j;
buf=(unsigned char *)s->init_buf->data;
if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A)
{
if ((s->session == NULL) ||
(s->session->ssl_version != s->version))
{
if (!ssl_get_new_session(s,0))
{
ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
return(-1);
}
}
/* else use the pre-loaded session */
p=buf; /* header */
d=p+9; /* data section */
*(p++)=SSL2_MT_CLIENT_HELLO; /* type */
s2n(SSL2_VERSION,p); /* version */
n=j=0;
n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d);
d+=n;
if (n == 0)
{
SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
return(-1);
}
s2n(n,p); /* cipher spec num bytes */
if ((s->session->session_id_length > 0) &&
(s->session->session_id_length <=
SSL2_MAX_SSL_SESSION_ID_LENGTH))
{
i=s->session->session_id_length;
s2n(i,p); /* session id length */
memcpy(d,s->session->session_id,(unsigned int)i);
d+=i;
}
else
{
s2n(0,p);
}
s->s2->challenge_length=SSL2_CHALLENGE_LENGTH;
s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */
/*challenge id data*/
if(RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH) <= 0)
return -1;
memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH);
d+=SSL2_CHALLENGE_LENGTH;
s->state=SSL2_ST_SEND_CLIENT_HELLO_B;
s->init_num=d-buf;
s->init_off=0;
}
/* SSL2_ST_SEND_CLIENT_HELLO_B */
return(ssl2_do_write(s));
}
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
}
/* 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....
*/
else 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 (!(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];
/* The SSL2 protocol allows n to be larger, just pick
* a reasonable buffer size. */
#if SSL3_RT_DEFAULT_PACKET_SIZE < 1024*4 - SSL3_RT_DEFAULT_WRITE_OVERHEAD
#error "SSL3_RT_DEFAULT_PACKET_SIZE is too small."
#endif
n=((p[0]&0x7f)<<8)|p[1];
if (n > SSL3_RT_DEFAULT_PACKET_SIZE - 2)
{
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) /* 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) */
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 (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);
return(SSL_accept(s));
err:
if (buf != buf_space) OPENSSL_free(buf);
return(-1);
}
static int client_master_key(SSL *s)
{
unsigned char *buf;
unsigned char *p,*d;
int clear,enc,karg,i;
SSL_SESSION *sess;
const EVP_CIPHER *c;
const EVP_MD *md;
buf=(unsigned char *)s->init_buf->data;
if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A)
{
if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
{
ssl2_return_error(s,SSL2_PE_NO_CIPHER);
SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
return(-1);
}
sess=s->session;
p=buf;
d=p+10;
*(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */
i=ssl_put_cipher_by_char(s,sess->cipher,p);
p+=i;
/* make key_arg data */
i=EVP_CIPHER_iv_length(c);
sess->key_arg_length=i;
if (i > SSL_MAX_KEY_ARG_LENGTH)
{
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
return -1;
}
if (i > 0)
if(RAND_pseudo_bytes(sess->key_arg,i) <= 0)
return -1;
/* make a master key */
i=EVP_CIPHER_key_length(c);
sess->master_key_length=i;
if (i > 0)
{
if (i > sizeof sess->master_key)
{
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
return -1;
}
if (RAND_bytes(sess->master_key,i) <= 0)
{
ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
return(-1);
}
}
if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
enc=8;
else if (SSL_C_IS_EXPORT(sess->cipher))
enc=5;
else
enc=i;
if (i < enc)
{
ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR);
return(-1);
}
clear=i-enc;
s2n(clear,p);
memcpy(d,sess->master_key,(unsigned int)clear);
d+=clear;
enc=ssl_rsa_public_encrypt(sess->sess_cert,enc,
&(sess->master_key[clear]),d,
(s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
if (enc <= 0)
{
ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR);
return(-1);
}
#ifdef PKCS1_CHECK
if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++;
if (s->options & SSL_OP_PKCS1_CHECK_2)
sess->master_key[clear]++;
#endif
s2n(enc,p);
d+=enc;
karg=sess->key_arg_length;
s2n(karg,p); /* key arg size */
if (karg > sizeof sess->key_arg)
{
ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
return -1;
}
memcpy(d,sess->key_arg,(unsigned int)karg);
d+=karg;
s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B;
s->init_num=d-buf;
s->init_off=0;
}
/* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */
return(ssl2_do_write(s));
}
unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
{
int extdatalen=0;
unsigned char *ret = p;
ret+=2;
if (ret>=limit) return NULL; /* this really never occurs, but ... */
if (s->tlsext_hostname != NULL)
{
/* Add TLS extension servername to the Client Hello message */
unsigned long size_str;
long lenmax;
/* check for enough space.
4 for the servername type and entension length
2 for servernamelist length
1 for the hostname type
2 for hostname length
+ hostname length
*/
if ((lenmax = limit - ret - 9) < 0
|| (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
return NULL;
/* extension type and length */
s2n(TLSEXT_TYPE_server_name,ret);
s2n(size_str+5,ret);
/* length of servername list */
s2n(size_str+3,ret);
/* hostname type, length and hostname */
*(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
s2n(size_str,ret);
memcpy(ret, s->tlsext_hostname, size_str);
ret+=size_str;
}
if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
{
int ticklen;
if (s->session && s->session->tlsext_tick)
ticklen = s->session->tlsext_ticklen;
else
ticklen = 0;
/* Check for enough room 2 for extension type, 2 for len
* rest for ticket
*/
if (limit - ret - 4 - ticklen < 0)
return NULL;
s2n(TLSEXT_TYPE_session_ticket,ret);
s2n(ticklen,ret);
if (ticklen)
{
memcpy(ret, s->session->tlsext_tick, ticklen);
ret += ticklen;
}
}
if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
{
int i;
long extlen, idlen, itmp;
OCSP_RESPID *id;
idlen = 0;
for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
{
id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
itmp = i2d_OCSP_RESPID(id, NULL);
if (itmp <= 0)
return NULL;
idlen += itmp + 2;
}
if (s->tlsext_ocsp_exts)
{
extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
if (extlen < 0)
return NULL;
}
else
extlen = 0;
if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
s2n(TLSEXT_TYPE_status_request, ret);
if (extlen + idlen > 0xFFF0)
return NULL;
s2n(extlen + idlen + 5, ret);
*(ret++) = TLSEXT_STATUSTYPE_ocsp;
s2n(idlen, ret);
for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
{
/* save position of id len */
unsigned char *q = ret;
id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
/* skip over id len */
ret += 2;
itmp = i2d_OCSP_RESPID(id, &ret);
/* write id len */
s2n(itmp, q);
}
s2n(extlen, ret);
if (extlen > 0)
i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
}
if ((extdatalen = ret-p-2)== 0)
return p;
s2n(extdatalen,p);
return ret;
}
