Fix no-ssl3 configuration option
[openssl.git] / ssl / ssl_lib.c
index 9f0040065466ceabb39fcb2908d87e6d199e49c6..c336a85aa31df0dfb8195cbf38be2aeb96e2235f 100644 (file)
@@ -536,6 +536,16 @@ int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
        return X509_VERIFY_PARAM_set1(ssl->param, vpm);
        }
 
+X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
+       {
+       return ctx->param;
+       }
+
+X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
+       {
+       return ssl->param;
+       }
+
 void SSL_certs_clear(SSL *s)
        {
        ssl_cert_clear_certs(s->cert);
@@ -1332,6 +1342,33 @@ STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
        return(NULL);
        }
 
+STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
+       {
+       STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
+       int i;
+       ciphers = SSL_get_ciphers(s);
+       if (!ciphers)
+               return NULL;
+       ssl_set_client_disabled(s);
+       for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++)
+               {
+               const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
+               if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
+                       {
+                       if (!sk)
+                               sk = sk_SSL_CIPHER_new_null();
+                       if (!sk)
+                               return NULL;
+                       if (!sk_SSL_CIPHER_push(sk, c))
+                               {
+                               sk_SSL_CIPHER_free(sk);
+                               return NULL;
+                               }
+                       }
+               }
+       return sk;
+       }
+
 /** return a STACK of the ciphers available for the SSL and in order of
  * algorithm id */
 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
@@ -1422,6 +1459,10 @@ char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
 
        p=buf;
        sk=s->session->ciphers;
+
+       if (sk_SSL_CIPHER_num(sk) == 0)
+               return NULL;
+
        for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
                {
                int n;
@@ -1449,49 +1490,59 @@ int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
        {
        int i,j=0;
        SSL_CIPHER *c;
-       CERT *ct = s->cert;
        unsigned char *q;
-       int no_scsv = s->renegotiate;
+       int empty_reneg_info_scsv = !s->renegotiate;
        /* Set disabled masks for this session */
        ssl_set_client_disabled(s);
 
        if (sk == NULL) return(0);
        q=p;
+       if (put_cb == NULL)
+               put_cb = s->method->put_cipher_by_char;
 
        for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
                {
                c=sk_SSL_CIPHER_value(sk,i);
                /* Skip disabled ciphers */
-               if (c->algorithm_ssl & ct->mask_ssl ||
-                       c->algorithm_mkey & ct->mask_k ||
-                       c->algorithm_auth & ct->mask_a)
+               if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
                        continue;
 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
                if (c->id == SSL3_CK_SCSV)
                        {
-                       if (no_scsv)
+                       if (!empty_reneg_info_scsv)
                                continue;
                        else
-                               no_scsv = 1;
+                               empty_reneg_info_scsv = 0;
                        }
 #endif
-               j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
+               j = put_cb(c,p);
                p+=j;
                }
-       /* If p == q, no ciphers and caller indicates an error. Otherwise
-        * add SCSV if not renegotiating.
-        */
-       if (p != q && !no_scsv)
+       /* If p == q, no ciphers; caller indicates an error.
+        * Otherwise, add applicable SCSVs. */
+       if (p != q)
                {
-               static SSL_CIPHER scsv =
+               if (empty_reneg_info_scsv)
                        {
-                       0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
-                       };
-               j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
-               p+=j;
+                       static SSL_CIPHER scsv =
+                               {
+                               0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
+                               };
+                       j = put_cb(&scsv,p);
+                       p+=j;
 #ifdef OPENSSL_RI_DEBUG
-               fprintf(stderr, "SCSV sent by client\n");
+                       fprintf(stderr, "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
 #endif
+                       }
+               if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
+                       {
+                       static SSL_CIPHER scsv =
+                               {
+                               0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
+                               };
+                       j = put_cb(&scsv,p);
+                       p+=j;
+                       }
                }
 
        return(p-q);
@@ -1503,11 +1554,12 @@ STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
        const SSL_CIPHER *c;
        STACK_OF(SSL_CIPHER) *sk;
        int i,n;
+
        if (s->s3)
                s->s3->send_connection_binding = 0;
 
        n=ssl_put_cipher_by_char(s,NULL,NULL);
-       if ((num%n) != 0)
+       if (n == 0 || (num%n) != 0)
                {
                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
                return(NULL);
@@ -1532,7 +1584,7 @@ STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
 
        for (i=0; i<num; i+=n)
                {
-               /* Check for SCSV */
+               /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
                if (s->s3 && (n != 3 || !p[0]) &&
                        (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
                        (p[n-1] == (SSL3_CK_SCSV & 0xff)))
@@ -1552,6 +1604,23 @@ STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
                        continue;
                        }
 
+               /* Check for TLS_FALLBACK_SCSV */
+               if ((n != 3 || !p[0]) &&
+                       (p[n-2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
+                       (p[n-1] == (SSL3_CK_FALLBACK_SCSV & 0xff)))
+                       {
+                       /* The SCSV indicates that the client previously tried a higher version.
+                        * Fail if the current version is an unexpected downgrade. */
+                       if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL))
+                               {
+                               SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_INAPPROPRIATE_FALLBACK);
+                               if (s->s3)
+                                       ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INAPPROPRIATE_FALLBACK);
+                               goto err;
+                               }
+                       continue;
+                       }
+
                c=ssl_get_cipher_by_char(s,p);
                p+=n;
                if (c != NULL)
@@ -1596,7 +1665,6 @@ int SSL_get_servername_type(const SSL *s)
        return -1;
        }
 
-# ifndef OPENSSL_NO_NEXTPROTONEG
 /* SSL_select_next_proto implements the standard protocol selection. It is
  * expected that this function is called from the callback set by
  * SSL_CTX_set_next_proto_select_cb.
@@ -1663,6 +1731,7 @@ int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, const unsi
        return status;
        }
 
+# ifndef OPENSSL_NO_NEXTPROTONEG
 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
  * requested protocol for this connection and returns 0. If the client didn't
  * request any protocol, then *data is set to NULL.
@@ -1713,62 +1782,6 @@ void SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, unsigned
        }
 # endif
 
-int SSL_CTX_set_custom_cli_ext(SSL_CTX *ctx, unsigned short ext_type,
-                              custom_cli_ext_first_cb_fn fn1, 
-                              custom_cli_ext_second_cb_fn fn2, void* arg)
-       {
-       size_t i;
-       custom_cli_ext_record* record;
-
-       /* Check for duplicates */
-       for (i=0; i < ctx->custom_cli_ext_records_count; i++)
-               if (ext_type == ctx->custom_cli_ext_records[i].ext_type)
-                       return 0;
-
-       ctx->custom_cli_ext_records = OPENSSL_realloc(ctx->custom_cli_ext_records,
-                                                     (ctx->custom_cli_ext_records_count + 1) * 
-                                                     sizeof(custom_cli_ext_record));
-       if (!ctx->custom_cli_ext_records) {
-               ctx->custom_cli_ext_records_count = 0;
-               return 0;
-       }
-       ctx->custom_cli_ext_records_count++;
-       record = &ctx->custom_cli_ext_records[ctx->custom_cli_ext_records_count - 1];
-       record->ext_type = ext_type;
-       record->fn1 = fn1;
-       record->fn2 = fn2;
-       record->arg = arg;
-       return 1;
-       }
-
-int SSL_CTX_set_custom_srv_ext(SSL_CTX *ctx, unsigned short ext_type,
-                              custom_srv_ext_first_cb_fn fn1, 
-                              custom_srv_ext_second_cb_fn fn2, void* arg)
-       {
-       size_t i;
-       custom_srv_ext_record* record;
-
-       /* Check for duplicates */      
-       for (i=0; i < ctx->custom_srv_ext_records_count; i++)
-               if (ext_type == ctx->custom_srv_ext_records[i].ext_type)
-                       return 0;
-
-       ctx->custom_srv_ext_records = OPENSSL_realloc(ctx->custom_srv_ext_records,
-                                                     (ctx->custom_srv_ext_records_count + 1) * 
-                                                     sizeof(custom_srv_ext_record));
-       if (!ctx->custom_srv_ext_records) {
-               ctx->custom_srv_ext_records_count = 0;
-               return 0;
-       }
-       ctx->custom_srv_ext_records_count++;
-       record = &ctx->custom_srv_ext_records[ctx->custom_srv_ext_records_count - 1];
-       record->ext_type = ext_type;
-       record->fn1 = fn1;
-       record->fn2 = fn2;
-       record->arg = arg;
-       return 1;
-       }
-
 /* SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
  * length-prefixed strings).
@@ -1840,6 +1853,7 @@ void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
        else
                *len = ssl->s3->alpn_selected_len;
        }
+
 #endif /* !OPENSSL_NO_TLSEXT */
 
 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
@@ -2039,10 +2053,6 @@ SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
 #ifndef OPENSSL_NO_SRP
        SSL_CTX_SRP_CTX_init(ret);
 #endif
-       ret->custom_cli_ext_records = NULL;
-       ret->custom_cli_ext_records_count = 0;
-       ret->custom_srv_ext_records = NULL;
-       ret->custom_srv_ext_records_count = 0;
 #ifndef OPENSSL_NO_BUF_FREELISTS
        ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
        ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
@@ -2181,10 +2191,6 @@ void SSL_CTX_free(SSL_CTX *a)
 #ifndef OPENSSL_NO_SRP
        SSL_CTX_SRP_CTX_free(a);
 #endif
-#ifndef OPENSSL_NO_TLSEXT
-       OPENSSL_free(a->custom_cli_ext_records);
-       OPENSSL_free(a->custom_srv_ext_records);
-#endif
 #ifndef OPENSSL_NO_ENGINE
        if (a->client_cert_engine)
                ENGINE_finish(a->client_cert_engine);
@@ -2277,8 +2283,8 @@ void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
        rsa_tmp=rsa_tmp_export=0;
 #endif
 #ifndef OPENSSL_NO_DH
-       dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
-       dh_tmp_export=(c->dh_tmp_cb != NULL ||
+       dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
+       dh_tmp_export= !c->dh_tmp_auto && (c->dh_tmp_cb != NULL ||
                (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
 #else
        dh_tmp=dh_tmp_export=0;
@@ -2335,20 +2341,20 @@ void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
                emask_k|=SSL_kRSA;
 
 #if 0
-       /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
+       /* The match needs to be both kDHE and aRSA or aDSA, so don't worry */
        if (    (dh_tmp || dh_rsa || dh_dsa) &&
                (rsa_enc || rsa_sign || dsa_sign))
-               mask_k|=SSL_kEDH;
+               mask_k|=SSL_kDHE;
        if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
                (rsa_enc || rsa_sign || dsa_sign))
-               emask_k|=SSL_kEDH;
+               emask_k|=SSL_kDHE;
 #endif
 
        if (dh_tmp_export)
-               emask_k|=SSL_kEDH;
+               emask_k|=SSL_kDHE;
 
        if (dh_tmp)
-               mask_k|=SSL_kEDH;
+               mask_k|=SSL_kDHE;
 
        if (dh_rsa) mask_k|=SSL_kDHr;
        if (dh_rsa_export) emask_k|=SSL_kDHr;
@@ -2446,8 +2452,8 @@ void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
 #ifndef OPENSSL_NO_ECDH
        if (have_ecdh_tmp)
                {
-               mask_k|=SSL_kEECDH;
-               emask_k|=SSL_kEECDH;
+               mask_k|=SSL_kECDHE;
+               emask_k|=SSL_kECDHE;
                }
 #endif
 
@@ -2559,6 +2565,8 @@ CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
        int i;
 
        c = s->cert;
+       if (!s->s3 || !s->s3->tmp.new_cipher)
+               return NULL;
        ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
 
 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
@@ -2621,25 +2629,6 @@ EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
        }
 
 #ifndef OPENSSL_NO_TLSEXT
-unsigned char *ssl_get_authz_data(SSL *s, size_t *authz_length)
-       {
-       CERT *c;
-       int i;
-
-       c = s->cert;
-       i = ssl_get_server_cert_index(s);
-
-       if (i == -1)
-               return NULL;
-
-       *authz_length = 0;
-       if (c->pkeys[i].authz == NULL)
-               return(NULL);
-       *authz_length = c->pkeys[i].authz_length;
-
-       return c->pkeys[i].authz;
-       }
-
 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
                                   size_t *serverinfo_length)
        {
@@ -2693,6 +2682,11 @@ void ssl_update_cache(SSL *s,int mode)
                }
        }
 
+const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
+       {
+       return ctx->method;
+       }
+
 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
        {
        return(s->method);
@@ -3056,7 +3050,6 @@ void ssl_clear_cipher_ctx(SSL *s)
 #endif
        }
 
-/* Fix this function so that it takes an optional type parameter */
 X509 *SSL_get_certificate(const SSL *s)
        {
        if (s->cert != NULL)
@@ -3065,8 +3058,7 @@ X509 *SSL_get_certificate(const SSL *s)
                return(NULL);
        }
 
-/* Fix this function so that it takes an optional type parameter */
-EVP_PKEY *SSL_get_privatekey(SSL *s)
+EVP_PKEY *SSL_get_privatekey(const SSL *s)
        {
        if (s->cert != NULL)
                return(s->cert->key->privatekey);
@@ -3074,6 +3066,22 @@ EVP_PKEY *SSL_get_privatekey(SSL *s)
                return(NULL);
        }
 
+X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
+       {
+       if (ctx->cert != NULL)
+               return ctx->cert->key->x509;
+       else
+               return NULL;
+       }
+
+EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
+       {
+       if (ctx->cert != NULL)
+               return ctx->cert->key->privatekey;
+       else
+               return NULL ;
+       }
+
 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
        {
        if ((s->session != NULL) && (s->session->cipher != NULL))
@@ -3538,6 +3546,66 @@ int SSL_is_server(SSL *s)
        return s->server;
        }
 
+void SSL_set_security_level(SSL *s, int level)
+       {
+       s->cert->sec_level = level;
+       }
+
+int SSL_get_security_level(const SSL *s)
+       {
+       return s->cert->sec_level;
+       }
+
+void SSL_set_security_callback(SSL *s, int (*cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex))
+       {
+       s->cert->sec_cb = cb;
+       }
+
+int (*SSL_get_security_callback(const SSL *s))(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex)
+       {
+       return s->cert->sec_cb;
+       }
+
+void SSL_set0_security_ex_data(SSL *s, void *ex)
+       {
+       s->cert->sec_ex = ex;
+       }
+
+void *SSL_get0_security_ex_data(const SSL *s)
+       {
+       return s->cert->sec_ex;
+       }
+
+void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
+       {
+       ctx->cert->sec_level = level;
+       }
+
+int SSL_CTX_get_security_level(const SSL_CTX *ctx)
+       {
+       return ctx->cert->sec_level;
+       }
+
+void SSL_CTX_set_security_callback(SSL_CTX *ctx, int (*cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex))
+       {
+       ctx->cert->sec_cb = cb;
+       }
+
+int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx))(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex)
+       {
+       return ctx->cert->sec_cb;
+       }
+
+void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
+       {
+       ctx->cert->sec_ex = ex;
+       }
+
+void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
+       {
+       return ctx->cert->sec_ex;
+       }
+
 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
 #include "../crypto/bio/bss_file.c"
 #endif