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Fix minor compiler issues.
[openssl.git] / ssl / s3_lib.c
diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c
index 1df1afa02e20511ec8f8b229a8d2548fe303f378..289dc51cb2e7a9407e9ff8c1d880c372cdf5937e 100644 (file)
--- a/ssl/s3_lib.c
+++ b/ssl/s3_lib.c
@@ -48,6 +48,7 @@
  */
 
 #include <stdio.h>
+#include <assert.h>
 #include <openssl/objects.h>
 #include "ssl_locl.h"
 #include <openssl/md5.h>
@@ -57,6 +58,14 @@
 #define SSL3_NUM_CIPHERS        OSSL_NELEM(ssl3_ciphers)
 #define SSL3_NUM_SCSVS          OSSL_NELEM(ssl3_scsvs)
 
+/* TLSv1.3 downgrade protection sentinel values */
+const unsigned char tls11downgrade[] = {
+    0x44, 0x4f, 0x57, 0x4e, 0x47, 0x52, 0x44, 0x00
+};
+const unsigned char tls12downgrade[] = {
+    0x44, 0x4f, 0x57, 0x4e, 0x47, 0x52, 0x44, 0x01
+};
+
 /*
  * The list of available ciphers, mostly organized into the following
  * groups:
@@ -922,7 +931,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aECDSA,
      SSL_eNULL,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_STRONG_NONE | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -938,7 +947,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aECDSA,
      SSL_3DES,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_NOT_DEFAULT | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -954,7 +963,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aECDSA,
      SSL_AES128,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_HIGH | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -969,7 +978,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aECDSA,
      SSL_AES256,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_HIGH | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -984,7 +993,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aRSA,
      SSL_eNULL,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_STRONG_NONE | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -1000,7 +1009,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aRSA,
      SSL_3DES,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_NOT_DEFAULT | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -1016,7 +1025,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aRSA,
      SSL_AES128,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_HIGH | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -1031,7 +1040,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aRSA,
      SSL_AES256,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_HIGH | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -1046,7 +1055,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aNULL,
      SSL_eNULL,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_STRONG_NONE | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -1062,7 +1071,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aNULL,
      SSL_3DES,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_NOT_DEFAULT | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -1078,7 +1087,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aNULL,
      SSL_AES128,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_NOT_DEFAULT | SSL_HIGH | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -1093,7 +1102,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aNULL,
      SSL_AES256,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_NOT_DEFAULT | SSL_HIGH | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -1689,7 +1698,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aPSK,
      SSL_3DES,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_NOT_DEFAULT | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -1705,7 +1714,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aPSK,
      SSL_AES128,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_HIGH | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -1720,7 +1729,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aPSK,
      SSL_AES256,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_HIGH | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -1765,7 +1774,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aPSK,
      SSL_eNULL,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      DTLS1_BAD_VER, DTLS1_2_VERSION,
      SSL_STRONG_NONE | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -2692,7 +2701,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aPSK,
      SSL_RC4,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      0, 0,
      SSL_NOT_DEFAULT | SSL_MEDIUM,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -2707,7 +2716,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aNULL,
      SSL_RC4,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      0, 0,
      SSL_NOT_DEFAULT | SSL_MEDIUM,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -2722,7 +2731,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aECDSA,
      SSL_RC4,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      0, 0,
      SSL_NOT_DEFAULT | SSL_MEDIUM,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -2737,7 +2746,7 @@ static SSL_CIPHER ssl3_ciphers[] = {
      SSL_aRSA,
      SSL_RC4,
      SSL_SHA1,
-     SSL3_VERSION, TLS1_2_VERSION,
+     TLS1_VERSION, TLS1_2_VERSION,
      0, 0,
      SSL_NOT_DEFAULT | SSL_MEDIUM,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
@@ -2926,7 +2935,7 @@ void ssl3_free(SSL *s)
 #endif
 
     OPENSSL_free(s->s3->tmp.ctype);
-    sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
+    sk_X509_NAME_pop_free(s->s3->tmp.peer_ca_names, X509_NAME_free);
     OPENSSL_free(s->s3->tmp.ciphers_raw);
     OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen);
     OPENSSL_free(s->s3->tmp.peer_sigalgs);
@@ -2945,7 +2954,7 @@ void ssl3_clear(SSL *s)
 {
     ssl3_cleanup_key_block(s);
     OPENSSL_free(s->s3->tmp.ctype);
-    sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
+    sk_X509_NAME_pop_free(s->s3->tmp.peer_ca_names, X509_NAME_free);
     OPENSSL_free(s->s3->tmp.ciphers_raw);
     OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen);
     OPENSSL_free(s->s3->tmp.peer_sigalgs);
@@ -3347,9 +3356,6 @@ long ssl3_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
             ctx->cert->dh_tmp = pkdh;
             return 1;
         }
-        /*
-         * break;
-         */
     case SSL_CTRL_SET_TMP_DH_CB:
         {
             SSLerr(SSL_F_SSL3_CTX_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
@@ -3381,7 +3387,6 @@ long ssl3_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
                                    &ctx->ext.supportedgroups_len,
                                    &nid, 1);
         }
-        /* break; */
 #endif                          /* !OPENSSL_NO_EC */
     case SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG:
         ctx->ext.servername_arg = parg;
@@ -3669,16 +3674,12 @@ const SSL_CIPHER *ssl3_choose_cipher(SSL *s, STACK_OF(SSL_CIPHER) *clnt,
 
     /* Let's see which ciphers we can support */
 
-#if 0
     /*
      * Do not set the compare functions, because this may lead to a
      * reordering by "id". We want to keep the original ordering. We may pay
      * a price in performance during sk_SSL_CIPHER_find(), but would have to
      * pay with the price of sk_SSL_CIPHER_dup().
      */
-    sk_SSL_CIPHER_set_cmp_func(srvr, ssl_cipher_ptr_id_cmp);
-    sk_SSL_CIPHER_set_cmp_func(clnt, ssl_cipher_ptr_id_cmp);
-#endif
 
 #ifdef CIPHER_DEBUG
     fprintf(stderr, "Server has %d from %p:\n", sk_SSL_CIPHER_num(srvr),
@@ -4015,9 +4016,10 @@ long ssl_get_algorithm2(SSL *s)
  * Fill a ClientRandom or ServerRandom field of length len. Returns <= 0 on
  * failure, 1 on success.
  */
-int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, size_t len)
+int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, size_t len,
+                          DOWNGRADE dgrd)
 {
-    int send_time = 0;
+    int send_time = 0, ret;
 
     if (len < 4)
         return 0;
@@ -4030,9 +4032,22 @@ int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, size_t len)
         unsigned char *p = result;
         l2n(Time, p);
         /* TODO(size_t): Convert this */
-        return RAND_bytes(p, (int)(len - 4));
-    } else
-        return RAND_bytes(result, (int)len);
+        ret = RAND_bytes(p, (int)(len - 4));
+    } else {
+        ret = RAND_bytes(result, (int)len);
+    }
+#ifndef OPENSSL_NO_TLS13DOWNGRADE
+    if (ret) {
+        assert(sizeof(tls11downgrade) < len && sizeof(tls12downgrade) < len);
+        if (dgrd == DOWNGRADE_TO_1_2)
+            memcpy(result + len - sizeof(tls12downgrade), tls12downgrade,
+                   sizeof(tls12downgrade));
+        else if (dgrd == DOWNGRADE_TO_1_1)
+            memcpy(result + len - sizeof(tls11downgrade), tls11downgrade,
+                   sizeof(tls11downgrade));
+    }
+#endif
+    return ret;
 }
 
 int ssl_generate_master_secret(SSL *s, unsigned char *pms, size_t pmslen,
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