Move CT viewer extension code to crypto/x509v3
[openssl.git] / ssl / s3_both.c
index 63b4c4c..0a259b1 100644 (file)
@@ -150,50 +150,91 @@ int ssl3_do_write(SSL *s, int type)
 
 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
        {
-       unsigned char *p,*d;
+       unsigned char *p;
        int i;
        unsigned long l;
 
        if (s->state == a)
                {
-               d=(unsigned char *)s->init_buf->data;
-               p= &(d[4]);
+               p = ssl_handshake_start(s);
 
                i=s->method->ssl3_enc->final_finish_mac(s,
                        sender,slen,s->s3->tmp.finish_md);
+               if (i == 0)
+                       return 0;
                s->s3->tmp.finish_md_len = i;
                memcpy(p, s->s3->tmp.finish_md, i);
-               p+=i;
                l=i;
 
+                /* Copy the finished so we can use it for
+                   renegotiation checks */
+                if(s->type == SSL_ST_CONNECT)
+                        {
+                         OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
+                         memcpy(s->s3->previous_client_finished, 
+                             s->s3->tmp.finish_md, i);
+                         s->s3->previous_client_finished_len=i;
+                        }
+                else
+                        {
+                        OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
+                        memcpy(s->s3->previous_server_finished, 
+                            s->s3->tmp.finish_md, i);
+                        s->s3->previous_server_finished_len=i;
+                        }
+
 #ifdef OPENSSL_SYS_WIN16
                /* MSVC 1.5 does not clear the top bytes of the word unless
                 * I do this.
                 */
                l&=0xffff;
 #endif
-
-               *(d++)=SSL3_MT_FINISHED;
-               l2n3(l,d);
-               s->init_num=(int)l+4;
-               s->init_off=0;
-
+               ssl_set_handshake_header(s, SSL3_MT_FINISHED, l);
                s->state=b;
                }
 
        /* SSL3_ST_SEND_xxxxxx_HELLO_B */
-       return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
+       return ssl_do_write(s);
        }
 
+#ifndef OPENSSL_NO_NEXTPROTONEG
+/* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */
+static void ssl3_take_mac(SSL *s)
+       {
+       const char *sender;
+       int slen;
+       /* If no new cipher setup return immediately: other functions will
+        * set the appropriate error.
+        */
+       if (s->s3->tmp.new_cipher == NULL)
+               return;
+       if (s->state & SSL_ST_CONNECT)
+               {
+               sender=s->method->ssl3_enc->server_finished_label;
+               slen=s->method->ssl3_enc->server_finished_label_len;
+               }
+       else
+               {
+               sender=s->method->ssl3_enc->client_finished_label;
+               slen=s->method->ssl3_enc->client_finished_label_len;
+               }
+
+       s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
+               sender,slen,s->s3->tmp.peer_finish_md);
+       }
+#endif
+
 int ssl3_get_finished(SSL *s, int a, int b)
        {
        int al,i,ok;
        long n;
        unsigned char *p;
 
+#ifdef OPENSSL_NO_NEXTPROTONEG
        /* the mac has already been generated when we received the
         * change cipher spec message and is in s->s3->tmp.peer_finish_md
         */ 
+#endif
 
        n=s->method->ssl_get_message(s,
                a,
@@ -223,13 +264,30 @@ int ssl3_get_finished(SSL *s, int a, int b)
                goto f_err;
                }
 
-       if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
+       if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
                {
                al=SSL_AD_DECRYPT_ERROR;
                SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
                goto f_err;
                }
 
+        /* Copy the finished so we can use it for
+           renegotiation checks */
+        if(s->type == SSL_ST_ACCEPT)
+                {
+                OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
+                memcpy(s->s3->previous_client_finished, 
+                    s->s3->tmp.peer_finish_md, i);
+                s->s3->previous_client_finished_len=i;
+                }
+        else
+                {
+                OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
+                memcpy(s->s3->previous_server_finished, 
+                    s->s3->tmp.peer_finish_md, i);
+                s->s3->previous_server_finished_len=i;
+                }
+
        return(1);
 f_err:
        ssl3_send_alert(s,SSL3_AL_FATAL,al);
@@ -262,92 +320,20 @@ int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
        return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
        }
 
-static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
-       {
-               int n;
-               unsigned char *p;
-
-               n=i2d_X509(x,NULL);
-               if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
-                       {
-                               SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
-                               return(-1);
-                       }
-               p=(unsigned char *)&(buf->data[*l]);
-               l2n3(n,p);
-               i2d_X509(x,&p);
-               *l+=n+3;
-
-               return(0);
-       }
-
-unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
+unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk)
        {
        unsigned char *p;
-       int i;
-       unsigned long l=7;
-       BUF_MEM *buf;
-       int no_chain;
+       unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s);
 
-       if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
-               no_chain = 1;
-       else
-               no_chain = 0;
-
-       /* TLSv1 sends a chain with nothing in it, instead of an alert */
-       buf=s->init_buf;
-       if (!BUF_MEM_grow_clean(buf,10))
-               {
-               SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
-               return(0);
-               }
-       if (x != NULL)
-               {
-               if (no_chain)
-                       {
-                       if (ssl3_add_cert_to_buf(buf, &l, x))
-                               return(0);
-                       }
-               else
-                       {
-                       X509_STORE_CTX xs_ctx;
-
-                       if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
-                               {
-                               SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
-                               return(0);
-                               }
-                       X509_verify_cert(&xs_ctx);
-                       for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
-                               {
-                               x = sk_X509_value(xs_ctx.chain, i);
-
-                               if (ssl3_add_cert_to_buf(buf, &l, x))
-                                       {
-                                       X509_STORE_CTX_cleanup(&xs_ctx);
-                                       return 0;
-                                       }
-                               }
-                       X509_STORE_CTX_cleanup(&xs_ctx);
-                       }
-               }
-       /* Thawte special :-) */
-       for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
-               {
-               x=sk_X509_value(s->ctx->extra_certs,i);
-               if (ssl3_add_cert_to_buf(buf, &l, x))
-                       return(0);
-               }
+       if (!ssl_add_cert_chain(s, cpk, &l))
+               return 0;
 
-       l-=7;
-       p=(unsigned char *)&(buf->data[4]);
-       l2n3(l,p);
-       l+=3;
-       p=(unsigned char *)&(buf->data[0]);
-       *(p++)=SSL3_MT_CERTIFICATE;
+       l -= 3 + SSL_HM_HEADER_LENGTH(s);
+       p = ssl_handshake_start(s);
        l2n3(l,p);
-       l+=4;
-       return(l);
+       l += 3;
+       ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l);
+       return l + SSL_HM_HEADER_LENGTH(s);
        }
 
 /* Obtain handshake message of message type 'mt' (any if mt == -1),
@@ -478,6 +464,15 @@ long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
                s->init_num += i;
                n -= i;
                }
+
+#ifndef OPENSSL_NO_NEXTPROTONEG
+       /* If receiving Finished, record MAC of prior handshake messages for
+        * Finished verification. */
+       if (*s->init_buf->data == SSL3_MT_FINISHED)
+               ssl3_take_mac(s);
+#endif
+
+       /* Feed this message into MAC computation. */
        ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
        if (s->msg_callback)
                s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
@@ -524,6 +519,18 @@ int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
                {
                ret = SSL_PKEY_GOST01;
                }
+       else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX))
+               {
+               /* For DH two cases: DH certificate signed with RSA and
+                * DH certificate signed with DSA.
+                */
+               i = X509_certificate_type(x, pk);
+               if (i & EVP_PKS_RSA)
+                       ret = SSL_PKEY_DH_RSA;
+               else if (i & EVP_PKS_DSA)
+                       ret = SSL_PKEY_DH_DSA;
+               }
+               
 err:
        if(!pkey) EVP_PKEY_free(pk);
        return(ret);
@@ -666,7 +673,12 @@ freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
 int ssl3_setup_read_buffer(SSL *s)
        {
        unsigned char *p;
-       size_t len,align=0;
+       size_t len,align=0,headerlen;
+       
+       if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
+               headerlen = DTLS1_RT_HEADER_LENGTH;
+       else
+               headerlen = SSL3_RT_HEADER_LENGTH;
 
 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
        align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
@@ -676,7 +688,7 @@ int ssl3_setup_read_buffer(SSL *s)
                {
                len = SSL3_RT_MAX_PLAIN_LENGTH
                        + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
-                       + SSL3_RT_HEADER_LENGTH + align;
+                       + headerlen + align;
                if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
                        {
                        s->s3->init_extra = 1;
@@ -703,7 +715,12 @@ err:
 int ssl3_setup_write_buffer(SSL *s)
        {
        unsigned char *p;
-       size_t len,align=0;
+       size_t len,align=0,headerlen;
+
+       if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
+               headerlen = DTLS1_RT_HEADER_LENGTH + 1;
+       else
+               headerlen = SSL3_RT_HEADER_LENGTH;
 
 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
        align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
@@ -713,13 +730,13 @@ int ssl3_setup_write_buffer(SSL *s)
                {
                len = s->max_send_fragment
                        + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
-                       + SSL3_RT_HEADER_LENGTH + align;
+                       + headerlen + align;
 #ifndef OPENSSL_NO_COMP
                if (!(s->options & SSL_OP_NO_COMPRESSION))
                        len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
 #endif
                if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
-                       len += SSL3_RT_HEADER_LENGTH + align
+                       len += headerlen + align
                                + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
 
                if ((p=freelist_extract(s->ctx, 0, len)) == NULL)