static int
arange_copy (krb5_context context, const krb5_address *inaddr,
krb5_address *outaddr)
{
krb5_error_code ret;
struct arange *i, *o;
outaddr->addr_type = KRB5_ADDRESS_ARANGE;
ret = krb5_data_alloc(&outaddr->address, sizeof(*o));
if(ret)
return ret;
i = inaddr->address.data;
o = outaddr->address.data;
ret = krb5_copy_address(context, &i->low, &o->low);
if(ret) {
krb5_data_free(&outaddr->address);
return ret;
}
ret = krb5_copy_address(context, &i->high, &o->high);
if(ret) {
krb5_free_address(context, &o->low);
krb5_data_free(&outaddr->address);
return ret;
}
return 0;
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_auth_con_getaddrs(krb5_context context,
krb5_auth_context auth_context,
krb5_address **local_addr,
krb5_address **remote_addr)
{
if(*local_addr)
krb5_free_address (context, *local_addr);
*local_addr = malloc (sizeof(**local_addr));
if (*local_addr == NULL) {
krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
return ENOMEM;
}
krb5_copy_address(context,
auth_context->local_address,
*local_addr);
if(*remote_addr)
krb5_free_address (context, *remote_addr);
*remote_addr = malloc (sizeof(**remote_addr));
if (*remote_addr == NULL) {
krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
krb5_free_address (context, *local_addr);
*local_addr = NULL;
return ENOMEM;
}
krb5_copy_address(context,
auth_context->remote_address,
*remote_addr);
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_append_addresses(krb5_context context,
krb5_addresses *dest,
const krb5_addresses *source)
{
krb5_address *tmp;
krb5_error_code ret;
int i;
if(source->len > 0) {
tmp = realloc(dest->val, (dest->len + source->len) * sizeof(*tmp));
if(tmp == NULL) {
krb5_set_error_message (context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
}
dest->val = tmp;
for(i = 0; i < source->len; i++) {
/* skip duplicates */
if(krb5_address_search(context, &source->val[i], dest))
continue;
ret = krb5_copy_address(context,
&source->val[i],
&dest->val[dest->len]);
if(ret)
return ret;
dest->len++;
}
}
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_auth_con_setaddrs(krb5_context context,
krb5_auth_context auth_context,
krb5_address *local_addr,
krb5_address *remote_addr)
{
if (local_addr) {
if (auth_context->local_address)
krb5_free_address (context, auth_context->local_address);
else
auth_context->local_address = malloc(sizeof(krb5_address));
krb5_copy_address(context, local_addr, auth_context->local_address);
}
if (remote_addr) {
if (auth_context->remote_address)
krb5_free_address (context, auth_context->remote_address);
else
auth_context->remote_address = malloc(sizeof(krb5_address));
krb5_copy_address(context, remote_addr, auth_context->remote_address);
}
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_copy_addresses(krb5_context context,
const krb5_addresses *inaddr,
krb5_addresses *outaddr)
{
int i;
ALLOC_SEQ(outaddr, inaddr->len);
if(inaddr->len > 0 && outaddr->val == NULL)
return ENOMEM;
for(i = 0; i < inaddr->len; i++)
krb5_copy_address(context, &inaddr->val[i], &outaddr->val[i]);
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_get_forwarded_creds (krb5_context context,
krb5_auth_context auth_context,
krb5_ccache ccache,
krb5_flags flags,
const char *hostname,
krb5_creds *in_creds,
krb5_data *out_data)
{
krb5_error_code ret;
krb5_creds *out_creds;
krb5_addresses addrs, *paddrs;
KRB_CRED cred;
KrbCredInfo *krb_cred_info;
EncKrbCredPart enc_krb_cred_part;
size_t len;
unsigned char *buf;
size_t buf_size;
krb5_kdc_flags kdc_flags;
krb5_crypto crypto;
struct addrinfo *ai;
int save_errno;
krb5_creds *ticket;
char *realm;
if (in_creds->client && in_creds->client->realm)
realm = in_creds->client->realm;
else
realm = in_creds->server->realm;
addrs.len = 0;
addrs.val = NULL;
paddrs = &addrs;
/*
* If tickets are address-less, forward address-less tickets.
*/
ret = _krb5_get_krbtgt (context,
ccache,
realm,
&ticket);
if(ret == 0) {
if (ticket->addresses.len == 0)
paddrs = NULL;
krb5_free_creds (context, ticket);
}
if (paddrs != NULL) {
ret = getaddrinfo (hostname, NULL, NULL, &ai);
if (ret) {
save_errno = errno;
krb5_set_error_string(context, "resolving %s: %s",
hostname, gai_strerror(ret));
return krb5_eai_to_heim_errno(ret, save_errno);
}
ret = add_addrs (context, &addrs, ai);
freeaddrinfo (ai);
if (ret)
return ret;
}
kdc_flags.b = int2KDCOptions(flags);
ret = krb5_get_kdc_cred (context,
ccache,
kdc_flags,
paddrs,
NULL,
in_creds,
&out_creds);
krb5_free_addresses (context, &addrs);
if (ret) {
return ret;
}
memset (&cred, 0, sizeof(cred));
cred.pvno = 5;
cred.msg_type = krb_cred;
ALLOC_SEQ(&cred.tickets, 1);
if (cred.tickets.val == NULL) {
ret = ENOMEM;
krb5_set_error_string(context, "malloc: out of memory");
goto out2;
}
ret = decode_Ticket(out_creds->ticket.data,
out_creds->ticket.length,
cred.tickets.val, &len);
if (ret)
goto out3;
memset (&enc_krb_cred_part, 0, sizeof(enc_krb_cred_part));
ALLOC_SEQ(&enc_krb_cred_part.ticket_info, 1);
if (enc_krb_cred_part.ticket_info.val == NULL) {
ret = ENOMEM;
krb5_set_error_string(context, "malloc: out of memory");
goto out4;
}
if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) {
krb5_timestamp sec;
int32_t usec;
krb5_us_timeofday (context, &sec, &usec);
ALLOC(enc_krb_cred_part.timestamp, 1);
if (enc_krb_cred_part.timestamp == NULL) {
ret = ENOMEM;
krb5_set_error_string(context, "malloc: out of memory");
goto out4;
}
*enc_krb_cred_part.timestamp = sec;
ALLOC(enc_krb_cred_part.usec, 1);
if (enc_krb_cred_part.usec == NULL) {
ret = ENOMEM;
krb5_set_error_string(context, "malloc: out of memory");
goto out4;
}
*enc_krb_cred_part.usec = usec;
} else {
enc_krb_cred_part.timestamp = NULL;
enc_krb_cred_part.usec = NULL;
}
if (auth_context->local_address && auth_context->local_port) {
krb5_boolean noaddr;
krb5_const_realm realm;
realm = krb5_principal_get_realm(context, out_creds->server);
krb5_appdefault_boolean(context, NULL, realm, "no-addresses", paddrs == NULL,
&noaddr);
if (!noaddr) {
ret = krb5_make_addrport (context,
&enc_krb_cred_part.s_address,
auth_context->local_address,
auth_context->local_port);
if (ret)
goto out4;
}
}
if (auth_context->remote_address) {
if (auth_context->remote_port) {
krb5_boolean noaddr;
krb5_const_realm realm;
realm = krb5_principal_get_realm(context, out_creds->server);
/* Is this correct, and should we use the paddrs == NULL
trick here as well? Having an address-less ticket may
indicate that we don't know our own global address, but
it does not necessary mean that we don't know the
server's. */
krb5_appdefault_boolean(context, NULL, realm, "no-addresses",
FALSE, &noaddr);
if (!noaddr) {
ret = krb5_make_addrport (context,
&enc_krb_cred_part.r_address,
auth_context->remote_address,
auth_context->remote_port);
if (ret)
goto out4;
}
} else {
ALLOC(enc_krb_cred_part.r_address, 1);
if (enc_krb_cred_part.r_address == NULL) {
ret = ENOMEM;
krb5_set_error_string(context, "malloc: out of memory");
goto out4;
}
ret = krb5_copy_address (context, auth_context->remote_address,
enc_krb_cred_part.r_address);
if (ret)
goto out4;
}
}
/* fill ticket_info.val[0] */
enc_krb_cred_part.ticket_info.len = 1;
krb_cred_info = enc_krb_cred_part.ticket_info.val;
copy_EncryptionKey (&out_creds->session, &krb_cred_info->key);
ALLOC(krb_cred_info->prealm, 1);
copy_Realm (&out_creds->client->realm, krb_cred_info->prealm);
ALLOC(krb_cred_info->pname, 1);
copy_PrincipalName(&out_creds->client->name, krb_cred_info->pname);
ALLOC(krb_cred_info->flags, 1);
*krb_cred_info->flags = out_creds->flags.b;
ALLOC(krb_cred_info->authtime, 1);
*krb_cred_info->authtime = out_creds->times.authtime;
ALLOC(krb_cred_info->starttime, 1);
*krb_cred_info->starttime = out_creds->times.starttime;
ALLOC(krb_cred_info->endtime, 1);
*krb_cred_info->endtime = out_creds->times.endtime;
ALLOC(krb_cred_info->renew_till, 1);
*krb_cred_info->renew_till = out_creds->times.renew_till;
ALLOC(krb_cred_info->srealm, 1);
copy_Realm (&out_creds->server->realm, krb_cred_info->srealm);
ALLOC(krb_cred_info->sname, 1);
copy_PrincipalName (&out_creds->server->name, krb_cred_info->sname);
ALLOC(krb_cred_info->caddr, 1);
copy_HostAddresses (&out_creds->addresses, krb_cred_info->caddr);
krb5_free_creds (context, out_creds);
/* encode EncKrbCredPart */
ASN1_MALLOC_ENCODE(EncKrbCredPart, buf, buf_size,
&enc_krb_cred_part, &len, ret);
free_EncKrbCredPart (&enc_krb_cred_part);
if (ret) {
free_KRB_CRED(&cred);
return ret;
}
if(buf_size != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
if (auth_context->flags & KRB5_AUTH_CONTEXT_CLEAR_FORWARDED_CRED) {
cred.enc_part.etype = ENCTYPE_NULL;
cred.enc_part.kvno = NULL;
cred.enc_part.cipher.data = buf;
cred.enc_part.cipher.length = buf_size;
} else {
krb5_keyblock *key;
if (auth_context->local_subkey)
key = auth_context->local_subkey;
else if (auth_context->remote_subkey)
key = auth_context->remote_subkey;
else
key = auth_context->keyblock;
ret = krb5_crypto_init(context, key, 0, &crypto);
if (ret) {
free(buf);
free_KRB_CRED(&cred);
return ret;
}
ret = krb5_encrypt_EncryptedData (context,
crypto,
KRB5_KU_KRB_CRED,
buf,
len,
0,
&cred.enc_part);
free(buf);
krb5_crypto_destroy(context, crypto);
if (ret) {
free_KRB_CRED(&cred);
return ret;
}
}
ASN1_MALLOC_ENCODE(KRB_CRED, buf, buf_size, &cred, &len, ret);
free_KRB_CRED (&cred);
if (ret)
return ret;
if(buf_size != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
out_data->length = len;
out_data->data = buf;
return 0;
out4:
free_EncKrbCredPart(&enc_krb_cred_part);
out3:
free_KRB_CRED(&cred);
out2:
krb5_free_creds (context, out_creds);
return ret;
}
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_get_forwarded_creds (krb5_context context,
krb5_auth_context auth_context,
krb5_ccache ccache,
krb5_flags flags,
const char *hostname,
krb5_creds *in_creds,
krb5_data *out_data)
{
krb5_error_code ret;
krb5_creds *out_creds;
krb5_addresses addrs, *paddrs;
KRB_CRED cred;
KrbCredInfo *krb_cred_info;
EncKrbCredPart enc_krb_cred_part;
size_t len;
unsigned char *buf;
size_t buf_size;
krb5_kdc_flags kdc_flags;
krb5_crypto crypto;
struct addrinfo *ai;
krb5_creds *ticket;
paddrs = NULL;
addrs.len = 0;
addrs.val = NULL;
ret = krb5_get_credentials(context, 0, ccache, in_creds, &ticket);
if(ret == 0) {
if (ticket->addresses.len)
paddrs = &addrs;
krb5_free_creds (context, ticket);
} else {
krb5_boolean noaddr;
krb5_appdefault_boolean(context, NULL,
krb5_principal_get_realm(context,
in_creds->client),
"no-addresses", KRB5_ADDRESSLESS_DEFAULT,
&noaddr);
if (!noaddr)
paddrs = &addrs;
}
/*
* If tickets have addresses, get the address of the remote host.
*/
if (paddrs != NULL) {
ret = getaddrinfo (hostname, NULL, NULL, &ai);
if (ret) {
krb5_error_code ret2 = krb5_eai_to_heim_errno(ret, errno);
krb5_set_error_message(context, ret2,
N_("resolving host %s failed: %s",
"hostname, error"),
hostname, gai_strerror(ret));
return ret2;
}
ret = add_addrs (context, &addrs, ai);
freeaddrinfo (ai);
if (ret)
return ret;
}
kdc_flags.b = int2KDCOptions(flags);
ret = krb5_get_kdc_cred (context,
ccache,
kdc_flags,
paddrs,
NULL,
in_creds,
&out_creds);
krb5_free_addresses (context, &addrs);
if (ret)
return ret;
memset (&cred, 0, sizeof(cred));
cred.pvno = 5;
cred.msg_type = krb_cred;
ALLOC_SEQ(&cred.tickets, 1);
if (cred.tickets.val == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto out2;
}
ret = decode_Ticket(out_creds->ticket.data,
out_creds->ticket.length,
cred.tickets.val, &len);
if (ret)
goto out3;
memset (&enc_krb_cred_part, 0, sizeof(enc_krb_cred_part));
ALLOC_SEQ(&enc_krb_cred_part.ticket_info, 1);
if (enc_krb_cred_part.ticket_info.val == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto out4;
}
if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) {
krb5_timestamp sec;
int32_t usec;
krb5_us_timeofday (context, &sec, &usec);
ALLOC(enc_krb_cred_part.timestamp, 1);
if (enc_krb_cred_part.timestamp == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto out4;
}
*enc_krb_cred_part.timestamp = sec;
ALLOC(enc_krb_cred_part.usec, 1);
if (enc_krb_cred_part.usec == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
goto out4;
}
*enc_krb_cred_part.usec = usec;
} else {
enc_krb_cred_part.timestamp = NULL;
enc_krb_cred_part.usec = NULL;
}
if (auth_context->local_address && auth_context->local_port && paddrs) {
ret = krb5_make_addrport (context,
&enc_krb_cred_part.s_address,
auth_context->local_address,
auth_context->local_port);
if (ret)
goto out4;
}
if (auth_context->remote_address) {
if (auth_context->remote_port) {
krb5_boolean noaddr;
krb5_const_realm srealm;
srealm = krb5_principal_get_realm(context, out_creds->server);
/* Is this correct, and should we use the paddrs == NULL
trick here as well? Having an address-less ticket may
indicate that we don't know our own global address, but
it does not necessary mean that we don't know the
server's. */
krb5_appdefault_boolean(context, NULL, srealm, "no-addresses",
FALSE, &noaddr);
if (!noaddr) {
ret = krb5_make_addrport (context,
&enc_krb_cred_part.r_address,
auth_context->remote_address,
auth_context->remote_port);
if (ret)
goto out4;
}
} else {
ALLOC(enc_krb_cred_part.r_address, 1);
if (enc_krb_cred_part.r_address == NULL) {
ret = ENOMEM;
krb5_set_error_message(context, ret,
N_("malloc: out of memory", ""));
goto out4;
}
ret = krb5_copy_address (context, auth_context->remote_address,
enc_krb_cred_part.r_address);
if (ret)
goto out4;
}
}
/* fill ticket_info.val[0] */
enc_krb_cred_part.ticket_info.len = 1;
krb_cred_info = enc_krb_cred_part.ticket_info.val;
copy_EncryptionKey (&out_creds->session, &krb_cred_info->key);
ALLOC(krb_cred_info->prealm, 1);
copy_Realm (&out_creds->client->realm, krb_cred_info->prealm);
ALLOC(krb_cred_info->pname, 1);
copy_PrincipalName(&out_creds->client->name, krb_cred_info->pname);
ALLOC(krb_cred_info->flags, 1);
*krb_cred_info->flags = out_creds->flags.b;
ALLOC(krb_cred_info->authtime, 1);
*krb_cred_info->authtime = out_creds->times.authtime;
ALLOC(krb_cred_info->starttime, 1);
*krb_cred_info->starttime = out_creds->times.starttime;
ALLOC(krb_cred_info->endtime, 1);
*krb_cred_info->endtime = out_creds->times.endtime;
ALLOC(krb_cred_info->renew_till, 1);
*krb_cred_info->renew_till = out_creds->times.renew_till;
ALLOC(krb_cred_info->srealm, 1);
copy_Realm (&out_creds->server->realm, krb_cred_info->srealm);
ALLOC(krb_cred_info->sname, 1);
copy_PrincipalName (&out_creds->server->name, krb_cred_info->sname);
ALLOC(krb_cred_info->caddr, 1);
copy_HostAddresses (&out_creds->addresses, krb_cred_info->caddr);
krb5_free_creds (context, out_creds);
/* encode EncKrbCredPart */
ASN1_MALLOC_ENCODE(EncKrbCredPart, buf, buf_size,
&enc_krb_cred_part, &len, ret);
free_EncKrbCredPart (&enc_krb_cred_part);
if (ret) {
free_KRB_CRED(&cred);
return ret;
}
if(buf_size != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
/**
* Some older of the MIT gssapi library used clear-text tickets
* (warped inside AP-REQ encryption), use the krb5_auth_context
* flag KRB5_AUTH_CONTEXT_CLEAR_FORWARDED_CRED to support those
* tickets. The session key is used otherwise to encrypt the
* forwarded ticket.
*/
if (auth_context->flags & KRB5_AUTH_CONTEXT_CLEAR_FORWARDED_CRED) {
cred.enc_part.etype = KRB5_ENCTYPE_NULL;
cred.enc_part.kvno = NULL;
cred.enc_part.cipher.data = buf;
cred.enc_part.cipher.length = buf_size;
} else {
/*
* Here older versions then 0.7.2 of Heimdal used the local or
* remote subkey. That is wrong, the session key should be
* used. Heimdal 0.7.2 and newer have code to try both in the
* receiving end.
*/
ret = krb5_crypto_init(context, auth_context->keyblock, 0, &crypto);
if (ret) {
free(buf);
free_KRB_CRED(&cred);
return ret;
}
ret = krb5_encrypt_EncryptedData (context,
crypto,
KRB5_KU_KRB_CRED,
buf,
len,
0,
&cred.enc_part);
free(buf);
krb5_crypto_destroy(context, crypto);
if (ret) {
free_KRB_CRED(&cred);
return ret;
}
}
ASN1_MALLOC_ENCODE(KRB_CRED, buf, buf_size, &cred, &len, ret);
free_KRB_CRED (&cred);
if (ret)
return ret;
if(buf_size != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
out_data->length = len;
out_data->data = buf;
return 0;
out4:
free_EncKrbCredPart(&enc_krb_cred_part);
out3:
free_KRB_CRED(&cred);
out2:
krb5_free_creds (context, out_creds);
return ret;
}
static int
arange_parse_addr (krb5_context context,
const char *address, krb5_address *addr)
{
char buf[1024], *p;
krb5_address low0, high0;
struct arange *a;
krb5_error_code ret;
if(strncasecmp(address, "RANGE:", 6) != 0)
return -1;
address += 6;
p = strrchr(address, '/');
if (p) {
krb5_addresses addrmask;
char *q;
long num;
if (strlcpy(buf, address, sizeof(buf)) > sizeof(buf))
return -1;
buf[p - address] = '\0';
ret = krb5_parse_address(context, buf, &addrmask);
if (ret)
return ret;
if(addrmask.len != 1) {
krb5_free_addresses(context, &addrmask);
return -1;
}
address += p - address + 1;
num = strtol(address, &q, 10);
if (q == address || *q != '\0' || num < 0) {
krb5_free_addresses(context, &addrmask);
return -1;
}
ret = krb5_address_prefixlen_boundary(context, &addrmask.val[0], num,
&low0, &high0);
krb5_free_addresses(context, &addrmask);
if (ret)
return ret;
} else {
krb5_addresses low, high;
strsep_copy(&address, "-", buf, sizeof(buf));
ret = krb5_parse_address(context, buf, &low);
if(ret)
return ret;
if(low.len != 1) {
krb5_free_addresses(context, &low);
return -1;
}
strsep_copy(&address, "-", buf, sizeof(buf));
ret = krb5_parse_address(context, buf, &high);
if(ret) {
krb5_free_addresses(context, &low);
return ret;
}
if(high.len != 1 && high.val[0].addr_type != low.val[0].addr_type) {
krb5_free_addresses(context, &low);
krb5_free_addresses(context, &high);
return -1;
}
ret = krb5_copy_address(context, &high.val[0], &high0);
if (ret == 0) {
ret = krb5_copy_address(context, &low.val[0], &low0);
if (ret)
krb5_free_address(context, &high0);
}
krb5_free_addresses(context, &low);
krb5_free_addresses(context, &high);
if (ret)
return ret;
}
krb5_data_alloc(&addr->address, sizeof(*a));
addr->addr_type = KRB5_ADDRESS_ARANGE;
a = addr->address.data;
if(krb5_address_order(context, &low0, &high0) < 0) {
a->low = low0;
a->high = high0;
} else {
a->low = high0;
a->high = low0;
}
return 0;
}
