* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
- *
+ *
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
+ *
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
+ * 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
+ *
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
- *
+ *
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
#include <openssl/ocsp.h>
#include "ssl_locl.h"
-const char tls1_version_str[]="TLSv1" OPENSSL_VERSION_PTEXT;
+const char tls1_version_str[] = "TLSv1" OPENSSL_VERSION_PTEXT;
#ifndef OPENSSL_NO_TLSEXT
static int tls_decrypt_ticket(SSL *s, const unsigned char *tick, int ticklen,
- const unsigned char *sess_id, int sesslen,
- SSL_SESSION **psess);
+ const unsigned char *sess_id, int sesslen,
+ SSL_SESSION **psess);
#endif
-SSL3_ENC_METHOD TLSv1_enc_data={
- tls1_enc,
- tls1_mac,
- tls1_setup_key_block,
- tls1_generate_master_secret,
- tls1_change_cipher_state,
- tls1_final_finish_mac,
- TLS1_FINISH_MAC_LENGTH,
- tls1_cert_verify_mac,
- TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
- TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
- tls1_alert_code,
- };
+SSL3_ENC_METHOD TLSv1_enc_data = {
+ tls1_enc,
+ tls1_mac,
+ tls1_setup_key_block,
+ tls1_generate_master_secret,
+ tls1_change_cipher_state,
+ tls1_final_finish_mac,
+ TLS1_FINISH_MAC_LENGTH,
+ tls1_cert_verify_mac,
+ TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
+ TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
+ tls1_alert_code,
+};
long tls1_default_timeout(void)
- {
- /* 2 hours, the 24 hours mentioned in the TLSv1 spec
- * is way too long for http, the cache would over fill */
- return(60*60*2);
- }
+{
+ /*
+ * 2 hours, the 24 hours mentioned in the TLSv1 spec is way too long for
+ * http, the cache would over fill
+ */
+ return (60 * 60 * 2);
+}
IMPLEMENT_tls1_meth_func(tlsv1_base_method,
- ssl_undefined_function,
- ssl_undefined_function,
- ssl_bad_method)
+ ssl_undefined_function,
+ ssl_undefined_function, ssl_bad_method)
int tls1_new(SSL *s)
- {
- if (!ssl3_new(s)) return(0);
- s->method->ssl_clear(s);
- return(1);
- }
+{
+ if (!ssl3_new(s))
+ return (0);
+ s->method->ssl_clear(s);
+ return (1);
+}
void tls1_free(SSL *s)
- {
- ssl3_free(s);
- }
+{
+ ssl3_free(s);
+}
void tls1_clear(SSL *s)
- {
- ssl3_clear(s);
- s->version=TLS1_VERSION;
- }
+{
+ ssl3_clear(s);
+ s->version = TLS1_VERSION;
+}
#if 0
long tls1_ctrl(SSL *s, int cmd, long larg, char *parg)
- {
- return(0);
- }
-
-long tls1_callback_ctrl(SSL *s, int cmd, void *(*fp)())
- {
- return(0);
- }
+{
+ return (0);
+}
+
+long tls1_callback_ctrl(SSL *s, int cmd, void *(*fp) ())
+{
+ return (0);
+}
#endif
#ifndef OPENSSL_NO_TLSEXT
-unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
- {
- int extdatalen=0;
- unsigned char *ret = p;
-
- /* don't add extensions for SSLv3 unless doing secure renegotiation */
- if (s->client_version == SSL3_VERSION
- && !s->s3->send_connection_binding)
- return 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;
-
- }
-
- /* Add RI if renegotiating */
- if (s->new_session)
- {
- int el;
-
- if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0))
- {
- SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- if((limit - p - 4 - el) < 0) return NULL;
-
- s2n(TLSEXT_TYPE_renegotiate,ret);
- s2n(el,ret);
-
- if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el))
- {
- SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- ret += el;
+unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p,
+ unsigned char *limit)
+{
+ int extdatalen = 0;
+ unsigned char *ret = p;
+
+ /* don't add extensions for SSLv3 unless doing secure renegotiation */
+ if (s->client_version == SSL3_VERSION && !s->s3->send_connection_binding)
+ return 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;
+
+ }
+
+ /* Add RI if renegotiating */
+ if (s->new_session) {
+ int el;
+
+ if (!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0)) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return NULL;
+ }
+
+ if ((limit - p - 4 - el) < 0)
+ return NULL;
+
+ s2n(TLSEXT_TYPE_renegotiate, ret);
+ s2n(el, ret);
+
+ if (!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el)) {
+ SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return NULL;
}
-
- if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
- {
- int ticklen;
- if (!s->new_session && 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 &&
- s->version != DTLS1_VERSION)
- {
- 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;
- }
-
-unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
- {
- int extdatalen=0;
- unsigned char *ret = p;
-
- /* don't add extensions for SSLv3, unless doing secure renegotiation */
- if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
- return p;
-
- ret+=2;
- if (ret>=limit) return NULL; /* this really never occurs, but ... */
-
- if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
- {
- if (limit - ret - 4 < 0) return NULL;
-
- s2n(TLSEXT_TYPE_server_name,ret);
- s2n(0,ret);
- }
-
- if(s->s3->send_connection_binding)
- {
- int el;
-
- if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
- {
- SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- if((limit - p - 4 - el) < 0) return NULL;
-
- s2n(TLSEXT_TYPE_renegotiate,ret);
- s2n(el,ret);
-
- if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
- {
- SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- ret += el;
+ ret += el;
+ }
+
+ if (!(SSL_get_options(s) & SSL_OP_NO_TICKET)) {
+ int ticklen;
+ if (!s->new_session && 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_ticket_expected
- && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
- {
- if (limit - ret - 4 < 0) return NULL;
- s2n(TLSEXT_TYPE_session_ticket,ret);
- s2n(0,ret);
- }
-
- if (s->tlsext_status_expected)
- {
- if ((long)(limit - ret - 4) < 0) return NULL;
- s2n(TLSEXT_TYPE_status_request,ret);
- s2n(0,ret);
- }
-
- if ((extdatalen = ret-p-2)== 0)
- return p;
-
- s2n(extdatalen,p);
- return ret;
- }
-
-#ifndef OPENSSL_NO_EC
+ }
+
+ if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
+ s->version != DTLS1_VERSION) {
+ 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;
+}
+
+unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p,
+ unsigned char *limit)
+{
+ int extdatalen = 0;
+ unsigned char *ret = p;
+
+ /*
+ * don't add extensions for SSLv3, unless doing secure renegotiation
+ */
+ if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
+ return p;
+
+ ret += 2;
+ if (ret >= limit)
+ return NULL; /* this really never occurs, but ... */
+
+ if (!s->hit && s->servername_done == 1
+ && s->session->tlsext_hostname != NULL) {
+ if (limit - ret - 4 < 0)
+ return NULL;
+
+ s2n(TLSEXT_TYPE_server_name, ret);
+ s2n(0, ret);
+ }
+
+ if (s->s3->send_connection_binding) {
+ int el;
+
+ if (!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0)) {
+ SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return NULL;
+ }
+
+ if ((limit - p - 4 - el) < 0)
+ return NULL;
+
+ s2n(TLSEXT_TYPE_renegotiate, ret);
+ s2n(el, ret);
+
+ if (!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el)) {
+ SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
+ return NULL;
+ }
+
+ ret += el;
+ }
+
+ if (s->tlsext_ticket_expected && !(SSL_get_options(s) & SSL_OP_NO_TICKET)) {
+ if (limit - ret - 4 < 0)
+ return NULL;
+ s2n(TLSEXT_TYPE_session_ticket, ret);
+ s2n(0, ret);
+ }
+
+ if (s->tlsext_status_expected) {
+ if ((long)(limit - ret - 4) < 0)
+ return NULL;
+ s2n(TLSEXT_TYPE_status_request, ret);
+ s2n(0, ret);
+ }
+
+ if ((extdatalen = ret - p - 2) == 0)
+ return p;
+
+ s2n(extdatalen, p);
+ return ret;
+}
+
+# ifndef OPENSSL_NO_EC
/*-
* ssl_check_for_safari attempts to fingerprint Safari using OS X
* SecureTransport using the TLS extension block in |d|, of length |n|.
* 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;
+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;
}
-#endif /* !OPENSSL_NO_EC */
+# endif /* !OPENSSL_NO_EC */
-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;
+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;
+ s->servername_done = 0;
+ s->tlsext_status_type = -1;
-#ifndef OPENSSL_NO_EC
- if (s->options & SSL_OP_SAFARI_ECDHE_ECDSA_BUG)
- ssl_check_for_safari(s, data, d, n);
-#endif /* !OPENSSL_NO_EC */
+# ifndef OPENSSL_NO_EC
+ if (s->options & SSL_OP_SAFARI_ECDHE_ECDSA_BUG)
+ ssl_check_for_safari(s, data, d, n);
+# endif /* !OPENSSL_NO_EC */
- if (data >= (d+n-2))
- goto ri_check;
+ if (data >= (d + n - 2))
+ goto ri_check;
- n2s(data,len);
+ n2s(data, len);
- if (data > (d+n-len))
- goto ri_check;
+ if (data > (d + n - len))
+ goto ri_check;
- while (data <= (d+n-4))
- {
- n2s(data,type);
- n2s(data,size);
+ while (data <= (d + n - 4)) {
+ n2s(data, type);
+ n2s(data, size);
- if (data+size > (d+n))
- goto ri_check;
+ if (data + size > (d + n))
+ goto ri_check;
- if (s->tlsext_debug_cb)
- s->tlsext_debug_cb(s, 0, type, data, size,
- s->tlsext_debug_arg);
+ 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:
*
* 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.
+ * 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.
+ * 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 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;
- }
-
- }
- 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;
- size -= 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 */
- 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;
- if (dsize > 0)
- {
- if (s->tlsext_ocsp_exts)
- {
- sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
- X509_EXTENSION_free);
- }
-
- 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;
- }
- 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;
- }
+ */
+
+ 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;
+ }
+
+ } 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;
+ size -= 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 */
+ 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;
+ if (dsize > 0) {
+ if (s->tlsext_ocsp_exts) {
+ sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
+ X509_EXTENSION_free);
+ }
+
+ 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;
+ } 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 ssl_check_clienthello_tlsext_early(SSL *s)
- {
- int ret=SSL_TLSEXT_ERR_NOACK;
- int al = SSL_AD_UNRECOGNIZED_NAME;
-
- if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
- ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
- else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
- ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
-
- switch (ret)
- {
- case SSL_TLSEXT_ERR_ALERT_FATAL:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- return -1;
-
- case SSL_TLSEXT_ERR_ALERT_WARNING:
- ssl3_send_alert(s, SSL3_AL_WARNING, al);
- return 1;
-
- case SSL_TLSEXT_ERR_NOACK:
- s->servername_done = 0;
-
- default:
- return 1;
- }
- }
+{
+ int ret = SSL_TLSEXT_ERR_NOACK;
+ int al = SSL_AD_UNRECOGNIZED_NAME;
+
+ if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
+ ret =
+ s->ctx->tlsext_servername_callback(s, &al,
+ s->ctx->tlsext_servername_arg);
+ else if (s->initial_ctx != NULL
+ && s->initial_ctx->tlsext_servername_callback != 0)
+ ret =
+ s->initial_ctx->tlsext_servername_callback(s, &al,
+ s->
+ initial_ctx->tlsext_servername_arg);
+
+ switch (ret) {
+ case SSL_TLSEXT_ERR_ALERT_FATAL:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ return -1;
+
+ case SSL_TLSEXT_ERR_ALERT_WARNING:
+ ssl3_send_alert(s, SSL3_AL_WARNING, al);
+ return 1;
+
+ case SSL_TLSEXT_ERR_NOACK:
+ s->servername_done = 0;
+
+ default:
+ return 1;
+ }
+}
int ssl_check_clienthello_tlsext_late(SSL *s)
- {
- int ret = SSL_TLSEXT_ERR_OK;
- int al;
-
- /* If status request then ask callback what to do.
- * Note: this must be called after servername callbacks in case
- * the certificate has changed, and must be called after the cipher
- * has been chosen because this may influence which certificate is sent
- */
- if (s->tlsext_status_type != -1 && s->ctx && s->ctx->tlsext_status_cb)
- {
- int r;
- CERT_PKEY *certpkey;
- certpkey = ssl_get_server_send_pkey(s);
- /* If no certificate can't return certificate status */
- if (certpkey == NULL)
- {
- s->tlsext_status_expected = 0;
- return 1;
- }
- /* Set current certificate to one we will use so
- * SSL_get_certificate et al can pick it up.
- */
- s->cert->key = certpkey;
- r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
- switch (r)
- {
- /* We don't want to send a status request response */
- case SSL_TLSEXT_ERR_NOACK:
- s->tlsext_status_expected = 0;
- break;
- /* status request response should be sent */
- case SSL_TLSEXT_ERR_OK:
- if (s->tlsext_ocsp_resp)
- s->tlsext_status_expected = 1;
- else
- s->tlsext_status_expected = 0;
- break;
- /* something bad happened */
- case SSL_TLSEXT_ERR_ALERT_FATAL:
- ret = SSL_TLSEXT_ERR_ALERT_FATAL;
- al = SSL_AD_INTERNAL_ERROR;
- goto err;
- }
- }
- else
- s->tlsext_status_expected = 0;
+{
+ int ret = SSL_TLSEXT_ERR_OK;
+ int al;
+
+ /*
+ * If status request then ask callback what to do. Note: this must be
+ * called after servername callbacks in case the certificate has
+ * changed, and must be called after the cipher has been chosen because
+ * this may influence which certificate is sent
+ */
+ if (s->tlsext_status_type != -1 && s->ctx && s->ctx->tlsext_status_cb) {
+ int r;
+ CERT_PKEY *certpkey;
+ certpkey = ssl_get_server_send_pkey(s);
+ /* If no certificate can't return certificate status */
+ if (certpkey == NULL) {
+ s->tlsext_status_expected = 0;
+ return 1;
+ }
+ /*
+ * Set current certificate to one we will use so SSL_get_certificate
+ * et al can pick it up.
+ */
+ s->cert->key = certpkey;
+ r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
+ switch (r) {
+ /* We don't want to send a status request response */
+ case SSL_TLSEXT_ERR_NOACK:
+ s->tlsext_status_expected = 0;
+ break;
+ /* status request response should be sent */
+ case SSL_TLSEXT_ERR_OK:
+ if (s->tlsext_ocsp_resp)
+ s->tlsext_status_expected = 1;
+ else
+ s->tlsext_status_expected = 0;
+ break;
+ /* something bad happened */
+ case SSL_TLSEXT_ERR_ALERT_FATAL:
+ ret = SSL_TLSEXT_ERR_ALERT_FATAL;
+ al = SSL_AD_INTERNAL_ERROR;
+ goto err;
+ }
+ } else
+ s->tlsext_status_expected = 0;
err:
- switch (ret)
- {
- case SSL_TLSEXT_ERR_ALERT_FATAL:
- ssl3_send_alert(s,SSL3_AL_FATAL,al);
- return -1;
-
- case SSL_TLSEXT_ERR_ALERT_WARNING:
- ssl3_send_alert(s,SSL3_AL_WARNING,al);
- return 1;
-
- default:
- return 1;
- }
- }
+ switch (ret) {
+ case SSL_TLSEXT_ERR_ALERT_FATAL:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ return -1;
+
+ case SSL_TLSEXT_ERR_ALERT_WARNING:
+ ssl3_send_alert(s, SSL3_AL_WARNING, al);
+ return 1;
+
+ default:
+ return 1;
+ }
+}
int ssl_check_serverhello_tlsext(SSL *s)
- {
- int ret=SSL_TLSEXT_ERR_NOACK;
- int al = SSL_AD_UNRECOGNIZED_NAME;
-
- if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
- ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
- else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
- ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
-
- /* If we've requested certificate status and we wont get one
- * tell the callback
- */
- if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
- && s->ctx->tlsext_status_cb)
- {
- int r;
- /* Set resp to NULL, resplen to -1 so callback knows
- * there is no response.
- */
- if (s->tlsext_ocsp_resp)
- {
- OPENSSL_free(s->tlsext_ocsp_resp);
- s->tlsext_ocsp_resp = NULL;
- }
- s->tlsext_ocsp_resplen = -1;
- r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
- if (r == 0)
- {
- al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
- ret = SSL_TLSEXT_ERR_ALERT_FATAL;
- }
- if (r < 0)
- {
- al = SSL_AD_INTERNAL_ERROR;
- ret = SSL_TLSEXT_ERR_ALERT_FATAL;
- }
- }
-
- switch (ret)
- {
- case SSL_TLSEXT_ERR_ALERT_FATAL:
- ssl3_send_alert(s,SSL3_AL_FATAL,al);
- return -1;
-
- case SSL_TLSEXT_ERR_ALERT_WARNING:
- ssl3_send_alert(s,SSL3_AL_WARNING,al);
- return 1;
-
- case SSL_TLSEXT_ERR_NOACK:
- s->servername_done=0;
- default:
- return 1;
- }
- }
-
-/* Since the server cache lookup is done early on in the processing of client
+{
+ int ret = SSL_TLSEXT_ERR_NOACK;
+ int al = SSL_AD_UNRECOGNIZED_NAME;
+
+ if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
+ ret =
+ s->ctx->tlsext_servername_callback(s, &al,
+ s->ctx->tlsext_servername_arg);
+ else if (s->initial_ctx != NULL
+ && s->initial_ctx->tlsext_servername_callback != 0)
+ ret =
+ s->initial_ctx->tlsext_servername_callback(s, &al,
+ s->
+ initial_ctx->tlsext_servername_arg);
+
+ /*
+ * If we've requested certificate status and we wont get one tell the
+ * callback
+ */
+ if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
+ && s->ctx->tlsext_status_cb) {
+ int r;
+ /*
+ * Set resp to NULL, resplen to -1 so callback knows there is no
+ * response.
+ */
+ if (s->tlsext_ocsp_resp) {
+ OPENSSL_free(s->tlsext_ocsp_resp);
+ s->tlsext_ocsp_resp = NULL;
+ }
+ s->tlsext_ocsp_resplen = -1;
+ r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
+ if (r == 0) {
+ al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
+ ret = SSL_TLSEXT_ERR_ALERT_FATAL;
+ }
+ if (r < 0) {
+ al = SSL_AD_INTERNAL_ERROR;
+ ret = SSL_TLSEXT_ERR_ALERT_FATAL;
+ }
+ }
+
+ switch (ret) {
+ case SSL_TLSEXT_ERR_ALERT_FATAL:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ return -1;
+
+ case SSL_TLSEXT_ERR_ALERT_WARNING:
+ ssl3_send_alert(s, SSL3_AL_WARNING, al);
+ return 1;
+
+ case SSL_TLSEXT_ERR_NOACK:
+ s->servername_done = 0;
+ default:
+ return 1;
+ }
+}
+
+/*
+ * Since the server cache lookup is done early on in the processing of client
* hello and other operations depend on the result we need to handle any TLS
* session ticket extension at the same time.
*/
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;
- }
-
-static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
- const unsigned char *sess_id, int sesslen,
- SSL_SESSION **psess)
- {
- SSL_SESSION *sess;
- unsigned char *sdec;
- const unsigned char *p;
- int slen, mlen, renew_ticket = 0;
- unsigned char tick_hmac[EVP_MAX_MD_SIZE];
- HMAC_CTX hctx;
- EVP_CIPHER_CTX ctx;
- SSL_CTX *tctx = s->initial_ctx;
- /* Need at least keyname + iv + some encrypted data */
- if (eticklen < 48)
- goto tickerr;
- /* Initialize session ticket encryption and HMAC contexts */
- HMAC_CTX_init(&hctx);
- EVP_CIPHER_CTX_init(&ctx);
- if (tctx->tlsext_ticket_key_cb)
- {
- unsigned char *nctick = (unsigned char *)etick;
- int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
- &ctx, &hctx, 0);
- if (rv < 0)
- return -1;
- if (rv == 0)
- goto tickerr;
- if (rv == 2)
- renew_ticket = 1;
- }
- else
- {
- /* Check key name matches */
- if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
- goto tickerr;
- HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
- tlsext_tick_md(), NULL);
- EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
- tctx->tlsext_tick_aes_key, etick + 16);
- }
- /* Attempt to process session ticket, first conduct sanity and
- * integrity checks on ticket.
- */
- mlen = HMAC_size(&hctx);
- eticklen -= mlen;
- /* Check HMAC of encrypted ticket */
- HMAC_Update(&hctx, etick, eticklen);
- HMAC_Final(&hctx, tick_hmac, NULL);
- HMAC_CTX_cleanup(&hctx);
- if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen))
- {
- EVP_CIPHER_CTX_cleanup(&ctx);
- goto tickerr;
- }
- /* Attempt to decrypt session data */
- /* Move p after IV to start of encrypted ticket, update length */
- p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
- eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
- sdec = OPENSSL_malloc(eticklen);
- if (!sdec)
- {
- EVP_CIPHER_CTX_cleanup(&ctx);
- return -1;
- }
- EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
- if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
- {
- EVP_CIPHER_CTX_cleanup(&ctx);
- OPENSSL_free(sdec);
- goto tickerr;
- }
- slen += mlen;
- EVP_CIPHER_CTX_cleanup(&ctx);
- p = sdec;
-
- sess = d2i_SSL_SESSION(NULL, &p, slen);
- OPENSSL_free(sdec);
- if (sess)
- {
- /* The session ID if non-empty is used by some clients to
- * detect that the ticket has been accepted. So we copy it to
- * the session structure. If it is empty set length to zero
- * as required by standard.
- */
- if (sesslen)
- memcpy(sess->session_id, sess_id, sesslen);
- sess->session_id_length = sesslen;
- *psess = sess;
- s->tlsext_ticket_expected = renew_ticket;
- return 1;
- }
- /* If session decrypt failure indicate a cache miss and set state to
- * send a new ticket
- */
- tickerr:
- s->tlsext_ticket_expected = 1;
- return 0;
- }
+ 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;
+}
+
+static int tls_decrypt_ticket(SSL *s, const unsigned char *etick,
+ int eticklen, const unsigned char *sess_id,
+ int sesslen, SSL_SESSION **psess)
+{
+ SSL_SESSION *sess;
+ unsigned char *sdec;
+ const unsigned char *p;
+ int slen, mlen, renew_ticket = 0;
+ unsigned char tick_hmac[EVP_MAX_MD_SIZE];
+ HMAC_CTX hctx;
+ EVP_CIPHER_CTX ctx;
+ SSL_CTX *tctx = s->initial_ctx;
+ /* Need at least keyname + iv + some encrypted data */
+ if (eticklen < 48)
+ goto tickerr;
+ /* Initialize session ticket encryption and HMAC contexts */
+ HMAC_CTX_init(&hctx);
+ EVP_CIPHER_CTX_init(&ctx);
+ if (tctx->tlsext_ticket_key_cb) {
+ unsigned char *nctick = (unsigned char *)etick;
+ int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
+ &ctx, &hctx, 0);
+ if (rv < 0)
+ return -1;
+ if (rv == 0)
+ goto tickerr;
+ if (rv == 2)
+ renew_ticket = 1;
+ } else {
+ /* Check key name matches */
+ if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
+ goto tickerr;
+ HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
+ tlsext_tick_md(), NULL);
+ EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
+ tctx->tlsext_tick_aes_key, etick + 16);
+ }
+ /*
+ * Attempt to process session ticket, first conduct sanity and integrity
+ * checks on ticket.
+ */
+ mlen = HMAC_size(&hctx);
+ eticklen -= mlen;
+ /* Check HMAC of encrypted ticket */
+ HMAC_Update(&hctx, etick, eticklen);
+ HMAC_Final(&hctx, tick_hmac, NULL);
+ HMAC_CTX_cleanup(&hctx);
+ if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) {
+ EVP_CIPHER_CTX_cleanup(&ctx);
+ goto tickerr;
+ }
+ /* Attempt to decrypt session data */
+ /* Move p after IV to start of encrypted ticket, update length */
+ p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
+ eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
+ sdec = OPENSSL_malloc(eticklen);
+ if (!sdec) {
+ EVP_CIPHER_CTX_cleanup(&ctx);
+ return -1;
+ }
+ EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
+ if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0) {
+ EVP_CIPHER_CTX_cleanup(&ctx);
+ OPENSSL_free(sdec);
+ goto tickerr;
+ }
+ slen += mlen;
+ EVP_CIPHER_CTX_cleanup(&ctx);
+ p = sdec;
+
+ sess = d2i_SSL_SESSION(NULL, &p, slen);
+ OPENSSL_free(sdec);
+ if (sess) {
+ /*
+ * The session ID if non-empty is used by some clients to detect that
+ * the ticket has been accepted. So we copy it to the session
+ * structure. If it is empty set length to zero as required by
+ * standard.
+ */
+ if (sesslen)
+ memcpy(sess->session_id, sess_id, sesslen);
+ sess->session_id_length = sesslen;
+ *psess = sess;
+ s->tlsext_ticket_expected = renew_ticket;
+ return 1;
+ }
+ /*
+ * If session decrypt failure indicate a cache miss and set state to send
+ * a new ticket
+ */
+ tickerr:
+ s->tlsext_ticket_expected = 1;
+ return 0;
+}
#endif
projects / oweals / openssl.git / blobdiff