diff options
author | Ben Laurie <ben@openssl.org> | 2011-11-13 21:55:42 +0000 |
---|---|---|
committer | Ben Laurie <ben@openssl.org> | 2011-11-13 21:55:42 +0000 |
commit | 68b33cc5c7aa1bb98e95bfb4b61c34192a7a50e3 (patch) | |
tree | 8c4298a1cc0487b3223a06764fe5f338f9691ad8 | |
parent | 4c02cf8ecc4b4cedeb6b6c11185f5d3e49c3cd4a (diff) |
Add Next Protocol Negotiation.
-rw-r--r-- | apps/apps.c | 44 | ||||
-rw-r--r-- | apps/apps.h | 4 | ||||
-rw-r--r-- | apps/s_client.c | 78 | ||||
-rw-r--r-- | apps/s_server.c | 71 | ||||
-rw-r--r-- | ssl/s3_both.c | 36 | ||||
-rw-r--r-- | ssl/s3_clnt.c | 44 | ||||
-rw-r--r-- | ssl/s3_lib.c | 9 | ||||
-rw-r--r-- | ssl/s3_pkt.c | 4 | ||||
-rw-r--r-- | ssl/s3_srvr.c | 101 | ||||
-rw-r--r-- | ssl/ssl.h | 61 | ||||
-rw-r--r-- | ssl/ssl3.h | 10 | ||||
-rw-r--r-- | ssl/ssl_err.c | 5 | ||||
-rw-r--r-- | ssl/ssl_lib.c | 129 | ||||
-rw-r--r-- | ssl/ssl_locl.h | 6 | ||||
-rw-r--r-- | ssl/t1_lib.c | 112 | ||||
-rw-r--r-- | ssl/tls1.h | 5 |
16 files changed, 712 insertions, 7 deletions
diff --git a/apps/apps.c b/apps/apps.c index feb7ed46e6..b346558d2c 100644 --- a/apps/apps.c +++ b/apps/apps.c @@ -2693,6 +2693,50 @@ void jpake_server_auth(BIO *out, BIO *conn, const char *secret) #endif +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) +/* next_protos_parse parses a comma separated list of strings into a string + * in a format suitable for passing to SSL_CTX_set_next_protos_advertised. + * outlen: (output) set to the length of the resulting buffer on success. + * err: (maybe NULL) on failure, an error message line is written to this BIO. + * in: a NUL termianted string like "abc,def,ghi" + * + * returns: a malloced buffer or NULL on failure. + */ +unsigned char *next_protos_parse(unsigned short *outlen, const char *in) + { + size_t len; + unsigned char *out; + size_t i, start = 0; + + len = strlen(in); + if (len >= 65535) + return NULL; + + out = OPENSSL_malloc(strlen(in) + 1); + if (!out) + return NULL; + + for (i = 0; i <= len; ++i) + { + if (i == len || in[i] == ',') + { + if (i - start > 255) + { + OPENSSL_free(out); + return NULL; + } + out[start] = i - start; + start = i + 1; + } + else + out[i+1] = in[i]; + } + + *outlen = len + 1; + return out; + } +#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ + /* * Platform-specific sections */ diff --git a/apps/apps.h b/apps/apps.h index 42a388648e..c1ca99da12 100644 --- a/apps/apps.h +++ b/apps/apps.h @@ -331,6 +331,10 @@ void jpake_client_auth(BIO *out, BIO *conn, const char *secret); void jpake_server_auth(BIO *out, BIO *conn, const char *secret); #endif +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) +unsigned char *next_protos_parse(unsigned short *outlen, const char *in); +#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ + #define FORMAT_UNDEF 0 #define FORMAT_ASN1 1 #define FORMAT_TEXT 2 diff --git a/apps/s_client.c b/apps/s_client.c index cde4828796..5f251a4247 100644 --- a/apps/s_client.c +++ b/apps/s_client.c @@ -354,6 +354,9 @@ static void sc_usage(void) BIO_printf(bio_err," -tlsextdebug - hex dump of all TLS extensions received\n"); BIO_printf(bio_err," -status - request certificate status from server\n"); BIO_printf(bio_err," -no_ticket - disable use of RFC4507bis session tickets\n"); +# if !defined(OPENSSL_NO_NEXTPROTONEG) + BIO_printf(bio_err," -nextprotoneg arg - enable NPN extension, considering named protocols supported (comma-separated list)\n"); +# endif #endif BIO_printf(bio_err," -legacy_renegotiation - enable use of legacy renegotiation (dangerous)\n"); } @@ -484,6 +487,40 @@ static char * MS_CALLBACK missing_srp_username_callback(SSL *s, void *arg) } #endif + +# ifndef OPENSSL_NO_NEXTPROTONEG +/* This the context that we pass to next_proto_cb */ +typedef struct tlsextnextprotoctx_st { + unsigned char *data; + unsigned short len; + int status; +} tlsextnextprotoctx; + +static tlsextnextprotoctx next_proto; + +static int next_proto_cb(SSL *s, unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg) + { + tlsextnextprotoctx *ctx = arg; + + if (!c_quiet) + { + /* We can assume that |in| is syntactically valid. */ + unsigned i; + BIO_printf(bio_c_out, "Protocols advertised by server: "); + for (i = 0; i < inlen; ) + { + if (i) + BIO_write(bio_c_out, ", ", 2); + BIO_write(bio_c_out, &in[i + 1], in[i]); + i += in[i] + 1; + } + BIO_write(bio_c_out, "\n", 1); + } + + ctx->status = SSL_select_next_proto(out, outlen, in, inlen, ctx->data, ctx->len); + return SSL_TLSEXT_ERR_OK; + } +# endif #endif enum @@ -550,6 +587,9 @@ int MAIN(int argc, char **argv) char *servername = NULL; tlsextctx tlsextcbp = {NULL,0}; +# ifndef OPENSSL_NO_NEXTPROTONEG + const char *next_proto_neg_in = NULL; +# endif #endif char *sess_in = NULL; char *sess_out = NULL; @@ -821,6 +861,13 @@ int MAIN(int argc, char **argv) #ifndef OPENSSL_NO_TLSEXT else if (strcmp(*argv,"-no_ticket") == 0) { off|=SSL_OP_NO_TICKET; } +# ifndef OPENSSL_NO_NEXTPROTONEG + else if (strcmp(*argv,"-nextprotoneg") == 0) + { + if (--argc < 1) goto bad; + next_proto_neg_in = *(++argv); + } +# endif #endif else if (strcmp(*argv,"-serverpref") == 0) off|=SSL_OP_CIPHER_SERVER_PREFERENCE; @@ -927,6 +974,21 @@ bad: OpenSSL_add_ssl_algorithms(); SSL_load_error_strings(); +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + next_proto.status = -1; + if (next_proto_neg_in) + { + next_proto.data = next_protos_parse(&next_proto.len, next_proto_neg_in); + if (next_proto.data == NULL) + { + BIO_printf(bio_err, "Error parsing -nextprotoneg argument\n"); + goto end; + } + } + else + next_proto.data = NULL; +#endif + #ifndef OPENSSL_NO_ENGINE e = setup_engine(bio_err, engine_id, 1); if (ssl_client_engine_id) @@ -1056,6 +1118,11 @@ bad: */ if (socket_type == SOCK_DGRAM) SSL_CTX_set_read_ahead(ctx, 1); +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + if (next_proto.data) + SSL_CTX_set_next_proto_select_cb(ctx, next_proto_cb, &next_proto); +#endif + if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback); if (cipher != NULL) if(!SSL_CTX_set_cipher_list(ctx,cipher)) { @@ -1949,6 +2016,17 @@ static void print_stuff(BIO *bio, SSL *s, int full) } #endif +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + if (next_proto.status != -1) { + const unsigned char *proto; + unsigned int proto_len; + SSL_get0_next_proto_negotiated(s, &proto, &proto_len); + BIO_printf(bio, "Next protocol: (%d) ", next_proto.status); + BIO_write(bio, proto, proto_len); + BIO_write(bio, "\n", 1); + } +#endif + SSL_SESSION_print(bio,SSL_get_session(s)); BIO_printf(bio,"---\n"); if (peer != NULL) diff --git a/apps/s_server.c b/apps/s_server.c index 0137b31cd1..19f4fb25e2 100644 --- a/apps/s_server.c +++ b/apps/s_server.c @@ -537,6 +537,9 @@ static void sv_usage(void) BIO_printf(bio_err," -tlsextdebug - hex dump of all TLS extensions received\n"); BIO_printf(bio_err," -no_ticket - disable use of RFC4507bis session tickets\n"); BIO_printf(bio_err," -legacy_renegotiation - enable use of legacy renegotiation (dangerous)\n"); +# ifndef OPENSSL_NO_NEXTPROTONEG + BIO_printf(bio_err," -nextprotoneg arg - set the advertised protocols for the NPN extension (comma-separated list)\n"); +# endif #endif } @@ -871,6 +874,26 @@ BIO_printf(err, "cert_status: received %d ids\n", sk_OCSP_RESPID_num(ids)); ret = SSL_TLSEXT_ERR_ALERT_FATAL; goto done; } + +# ifndef OPENSSL_NO_NEXTPROTONEG +/* This is the context that we pass to next_proto_cb */ +typedef struct tlsextnextprotoctx_st { + unsigned char *data; + unsigned int len; +} tlsextnextprotoctx; + +static int next_proto_cb(SSL *s, const unsigned char **data, unsigned int *len, void *arg) + { + tlsextnextprotoctx *next_proto = arg; + + *data = next_proto->data; + *len = next_proto->len; + + return SSL_TLSEXT_ERR_OK; + } +# endif /* ndef OPENSSL_NO_NEXTPROTONEG */ + + #endif int MAIN(int, char **); @@ -909,9 +932,11 @@ int MAIN(int argc, char *argv[]) #ifndef OPENSSL_NO_TLSEXT EVP_PKEY *s_key2 = NULL; X509 *s_cert2 = NULL; -#endif -#ifndef OPENSSL_NO_TLSEXT tlsextctx tlsextcbp = {NULL, NULL, SSL_TLSEXT_ERR_ALERT_WARNING}; +# ifndef OPENSSL_NO_NEXTPROTONEG + const char *next_proto_neg_in = NULL; + tlsextnextprotoctx next_proto; +# endif #endif #ifndef OPENSSL_NO_PSK /* by default do not send a PSK identity hint */ @@ -1267,7 +1292,13 @@ int MAIN(int argc, char *argv[]) if (--argc < 1) goto bad; s_key_file2= *(++argv); } - +# ifndef OPENSSL_NO_NEXTPROTONEG + else if (strcmp(*argv,"-nextprotoneg") == 0) + { + if (--argc < 1) goto bad; + next_proto_neg_in = *(++argv); + } +# endif #endif #if !defined(OPENSSL_NO_JPAKE) && !defined(OPENSSL_NO_PSK) else if (strcmp(*argv,"-jpake") == 0) @@ -1372,6 +1403,22 @@ bad: goto end; } } + +# ifndef OPENSSL_NO_NEXTPROTONEG + if (next_proto_neg_in) + { + unsigned short len; + next_proto.data = next_protos_parse(&len, + next_proto_neg_in); + if (next_proto.data == NULL) + goto end; + next_proto.len = len; + } + else + { + next_proto.data = NULL; + } +# endif #endif } @@ -1552,6 +1599,11 @@ bad: if (vpm) SSL_CTX_set1_param(ctx2, vpm); } + +# ifndef OPENSSL_NO_NEXTPROTONEG + if (next_proto.data) + SSL_CTX_set_next_protos_advertised_cb(ctx, next_proto_cb, &next_proto); +# endif #endif #ifndef OPENSSL_NO_DH @@ -2257,6 +2309,10 @@ static int init_ssl_connection(SSL *con) #ifndef OPENSSL_NO_KRB5 char *client_princ; #endif +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + const unsigned char *next_proto_neg; + unsigned next_proto_neg_len; +#endif if ((i=SSL_accept(con)) <= 0) { @@ -2296,6 +2352,15 @@ static int init_ssl_connection(SSL *con) BIO_printf(bio_s_out,"Shared ciphers:%s\n",buf); str=SSL_CIPHER_get_name(SSL_get_current_cipher(con)); BIO_printf(bio_s_out,"CIPHER is %s\n",(str != NULL)?str:"(NONE)"); +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + SSL_get0_next_proto_negotiated(con, &next_proto_neg, &next_proto_neg_len); + if (next_proto_neg) + { + BIO_printf(bio_s_out,"NEXTPROTO is "); + BIO_write(bio_s_out, next_proto_neg, next_proto_neg_len); + BIO_printf(bio_s_out, "\n"); + } +#endif if (SSL_cache_hit(con)) BIO_printf(bio_s_out,"Reused session-id\n"); if (SSL_ctrl(con,SSL_CTRL_GET_FLAGS,0,NULL) & TLS1_FLAGS_TLS_PADDING_BUG) diff --git a/ssl/s3_both.c b/ssl/s3_both.c index a6d869df59..b63460a56d 100644 --- a/ssl/s3_both.c +++ b/ssl/s3_both.c @@ -202,15 +202,38 @@ int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen) return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); } +#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 (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; - /* the mac has already been generated when we received the - * change cipher spec message and is in s->s3->tmp.peer_finish_md - */ +#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, @@ -514,6 +537,13 @@ 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); diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c index 6cf6e6f378..1578f17e97 100644 --- a/ssl/s3_clnt.c +++ b/ssl/s3_clnt.c @@ -460,7 +460,16 @@ int ssl3_connect(SSL *s) ret=ssl3_send_change_cipher_spec(s, SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); if (ret <= 0) goto end; + + +#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) s->state=SSL3_ST_CW_FINISHED_A; +#else + if (s->next_proto_negotiated) + s->state=SSL3_ST_CW_NEXT_PROTO_A; + else + s->state=SSL3_ST_CW_FINISHED_A; +#endif s->init_num=0; s->session->cipher=s->s3->tmp.new_cipher; @@ -488,6 +497,15 @@ int ssl3_connect(SSL *s) break; +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + case SSL3_ST_CW_NEXT_PROTO_A: + case SSL3_ST_CW_NEXT_PROTO_B: + ret=ssl3_send_next_proto(s); + if (ret <= 0) goto end; + s->state=SSL3_ST_CW_FINISHED_A; + break; +#endif + case SSL3_ST_CW_FINISHED_A: case SSL3_ST_CW_FINISHED_B: ret=ssl3_send_finished(s, @@ -3236,6 +3254,32 @@ err: return(0); } +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) +int ssl3_send_next_proto(SSL *s) + { + unsigned int len, padding_len; + unsigned char *d; + + if (s->state == SSL3_ST_CW_NEXT_PROTO_A) + { + len = s->next_proto_negotiated_len; + padding_len = 32 - ((len + 2) % 32); + d = (unsigned char *)s->init_buf->data; + d[4] = len; + memcpy(d + 5, s->next_proto_negotiated, len); + d[5 + len] = padding_len; + memset(d + 6 + len, 0, padding_len); + *(d++)=SSL3_MT_NEXT_PROTO; + l2n3(2 + len + padding_len, d); + s->state = SSL3_ST_CW_NEXT_PROTO_B; + s->init_num = 4 + 2 + len + padding_len; + s->init_off = 0; + } + + return ssl3_do_write(s, SSL3_RT_HANDSHAKE); +} +#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ + /* Check to see if handshake is full or resumed. Usually this is just a * case of checking to see if a cache hit has occurred. In the case of * session tickets we have to check the next message to be sure. diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c index 14608a888a..a6778c213a 100644 --- a/ssl/s3_lib.c +++ b/ssl/s3_lib.c @@ -3062,6 +3062,15 @@ void ssl3_clear(SSL *s) s->s3->num_renegotiations=0; s->s3->in_read_app_data=0; s->version=SSL3_VERSION; + +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + if (s->next_proto_negotiated) + { + OPENSSL_free(s->next_proto_negotiated); + s->next_proto_negotiated = NULL; + s->next_proto_negotiated_len = 0; + } +#endif } #ifndef OPENSSL_NO_SRP diff --git a/ssl/s3_pkt.c b/ssl/s3_pkt.c index 33be6badbc..5e0cbdc3df 100644 --- a/ssl/s3_pkt.c +++ b/ssl/s3_pkt.c @@ -1392,8 +1392,10 @@ err: int ssl3_do_change_cipher_spec(SSL *s) { int i; +#ifdef OPENSSL_NO_NEXTPROTONEG const char *sender; int slen; +#endif if (s->state & SSL_ST_ACCEPT) i=SSL3_CHANGE_CIPHER_SERVER_READ; @@ -1416,6 +1418,7 @@ int ssl3_do_change_cipher_spec(SSL *s) if (!s->method->ssl3_enc->change_cipher_state(s,i)) return(0); +#ifdef OPENSSL_NO_NEXTPROTONEG /* we have to record the message digest at * this point so we can get it before we read * the finished message */ @@ -1432,6 +1435,7 @@ int ssl3_do_change_cipher_spec(SSL *s) s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s, sender,slen,s->s3->tmp.peer_finish_md); +#endif return(1); } diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c index af9ed3ff5f..4088598d23 100644 --- a/ssl/s3_srvr.c +++ b/ssl/s3_srvr.c @@ -598,7 +598,14 @@ int ssl3_accept(SSL *s) * the client uses its key from the certificate * for key exchange. */ +#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) s->state=SSL3_ST_SR_FINISHED_A; +#else + if (s->s3->next_proto_neg_seen) + s->state=SSL3_ST_SR_NEXT_PROTO_A; + else + s->state=SSL3_ST_SR_FINISHED_A; +#endif s->init_num = 0; } else if (TLS1_get_version(s) >= TLS1_2_VERSION) @@ -659,10 +666,27 @@ int ssl3_accept(SSL *s) ret=ssl3_get_cert_verify(s); if (ret <= 0) goto end; +#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) s->state=SSL3_ST_SR_FINISHED_A; +#else + if (s->s3->next_proto_neg_seen) + s->state=SSL3_ST_SR_NEXT_PROTO_A; + else + s->state=SSL3_ST_SR_FINISHED_A; +#endif s->init_num=0; break; +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + case SSL3_ST_SR_NEXT_PROTO_A: + case SSL3_ST_SR_NEXT_PROTO_B: + ret=ssl3_get_next_proto(s); + if (ret <= 0) goto end; + s->init_num = 0; + s->state=SSL3_ST_SR_FINISHED_A; + break; +#endif + case SSL3_ST_SR_FINISHED_A: case SSL3_ST_SR_FINISHED_B: ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, @@ -730,7 +754,16 @@ int ssl3_accept(SSL *s) if (ret <= 0) goto end; s->state=SSL3_ST_SW_FLUSH; if (s->hit) + { +#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; +#else + if (s->s3->next_proto_neg_seen) + s->s3->tmp.next_state=SSL3_ST_SR_NEXT_PROTO_A; + else + s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; +#endif + } else s->s3->tmp.next_state=SSL_ST_OK; s->init_num=0; @@ -3467,4 +3500,72 @@ int ssl3_send_cert_status(SSL *s) /* SSL3_ST_SW_CERT_STATUS_B */ return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); } + +# ifndef OPENSSL_NO_NEXTPROTONEG +/* ssl3_get_next_proto reads a Next Protocol Negotiation handshake message. It + * sets the next_proto member in s if found */ +int ssl3_get_next_proto(SSL *s) + { + int ok; + int proto_len, padding_len; + long n; + const unsigned char *p; + + /* Clients cannot send a NextProtocol message if we didn't see the + * extension in their ClientHello */ + if (!s->s3->next_proto_neg_seen) + { + SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_WITHOUT_EXTENSION); + return -1; + } + + n=s->method->ssl_get_message(s, + SSL3_ST_SR_NEXT_PROTO_A, + SSL3_ST_SR_NEXT_PROTO_B, + SSL3_MT_NEXT_PROTO, + 514, /* See the payload format below */ + &ok); + + if (!ok) + return((int)n); + + /* s->state doesn't reflect whether ChangeCipherSpec has been received + * in this handshake, but s->s3->change_cipher_spec does (will be reset + * by ssl3_get_finished). */ + if (!s->s3->change_cipher_spec) + { + SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_BEFORE_A_CCS); + return -1; + } + + if (n < 2) + return 0; /* The body must be > 1 bytes long */ + + p=(unsigned char *)s->init_msg; + + /* The payload looks like: + * uint8 proto_len; + * uint8 proto[proto_len]; + * uint8 padding_len; + * uint8 padding[padding_len]; + */ + proto_len = p[0]; + if (proto_len + 2 > s->init_num) + return 0; + padding_len = p[proto_len + 1]; + if (proto_len + padding_len + 2 != s->init_num) + return 0; + + s->next_proto_negotiated = OPENSSL_malloc(proto_len); + if (!s->next_proto_negotiated) + { + SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,ERR_R_MALLOC_FAILURE); + return 0; + } + memcpy(s->next_proto_negotiated, p + 1, proto_len); + s->next_proto_negotiated_len = proto_len; + + return 1; + } +# endif #endif @@ -917,9 +917,28 @@ struct ssl_ctx_st int (*tlsext_status_cb)(SSL *ssl, void *arg); void *tlsext_status_arg; +# ifndef OPENSSL_NO_NEXTPROTONEG + /* Next protocol negotiation information */ + /* (for experimental NPN extension). */ + + /* For a server, this contains a callback function by which the set of + * advertised protocols can be provided. */ + int (*next_protos_advertised_cb)(SSL *s, const unsigned char **buf, + unsigned int *len, void *arg); + void *next_protos_advertised_cb_arg; + /* For a client, this contains a callback function that selects the + * next protocol from the list provided by the server. */ + int (*next_proto_select_cb)(SSL *s, unsigned char **out, + unsigned char *outlen, + const unsigned char *in, + unsigned int inlen, + void *arg); + void *next_proto_select_cb_arg; + /* draft-rescorla-tls-opaque-prf-input-00.txt information */ int (*tlsext_opaque_prf_input_callback)(SSL *, void *peerinput, size_t len, void *arg); void *tlsext_opaque_prf_input_callback_arg; +# endif #endif #ifndef OPENSSL_NO_PSK @@ -996,6 +1015,32 @@ int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e); #endif void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, int (*app_gen_cookie_cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)); void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, int (*app_verify_cookie_cb)(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)); +#ifndef OPENSSL_NO_NEXTPROTONEG +void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *s, + int (*cb) (SSL *ssl, + const unsigned char **out, + unsigned int *outlen, + void *arg), + void *arg); +void SSL_CTX_set_next_proto_select_cb(SSL_CTX *s, + int (*cb) (SSL *ssl, + unsigned char **out, + unsigned char *outlen, + const unsigned char *in, + unsigned int inlen, + void *arg), + void *arg); + +int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, + const unsigned char *in, unsigned int inlen, + const unsigned char *client, unsigned int client_len); +void SSL_get0_next_proto_negotiated(const SSL *s, + const unsigned char **data, unsigned *len); + +#define OPENSSL_NPN_UNSUPPORTED 0 +#define OPENSSL_NPN_NEGOTIATED 1 +#define OPENSSL_NPN_NO_OVERLAP 2 +#endif #ifndef OPENSSL_NO_PSK /* the maximum length of the buffer given to callbacks containing the @@ -1260,6 +1305,19 @@ struct ssl_st void *tls_session_secret_cb_arg; SSL_CTX * initial_ctx; /* initial ctx, used to store sessions */ + +#ifndef OPENSSL_NO_NEXTPROTONEG + /* Next protocol negotiation. For the client, this is the protocol that + * we sent in NextProtocol and is set when handling ServerHello + * extensions. + * + * For a server, this is the client's selected_protocol from + * NextProtocol and is set when handling the NextProtocol message, + * before the Finished message. */ + unsigned char *next_proto_negotiated; + unsigned char next_proto_negotiated_len; +#endif + #define session_ctx initial_ctx #else #define session_ctx ctx @@ -2046,6 +2104,7 @@ void ERR_load_SSL_strings(void); #define SSL_F_SSL3_GET_KEY_EXCHANGE 141 #define SSL_F_SSL3_GET_MESSAGE 142 #define SSL_F_SSL3_GET_NEW_SESSION_TICKET 283 +#define SSL_F_SSL3_GET_NEXT_PROTO 305 #define SSL_F_SSL3_GET_RECORD 143 #define SSL_F_SSL3_GET_SERVER_CERTIFICATE 144 #define SSL_F_SSL3_GET_SERVER_DONE 145 @@ -2250,6 +2309,8 @@ void ERR_load_SSL_strings(void); #define SSL_R_EXCESSIVE_MESSAGE_SIZE 152 #define SSL_R_EXTRA_DATA_IN_MESSAGE 153 #define SSL_R_GOT_A_FIN_BEFORE_A_CCS 154 +#define SSL_R_GOT_NEXT_PROTO_BEFORE_A_CCS 355 +#define SSL_R_GOT_NEXT_PROTO_WITHOUT_EXTENSION 356 #define SSL_R_HTTPS_PROXY_REQUEST 155 #define SSL_R_HTTP_REQUEST 156 #define SSL_R_ILLEGAL_PADDING 283 diff --git a/ssl/ssl3.h b/ssl/ssl3.h index 38c5cc29a6..bef479a55f 100644 --- a/ssl/ssl3.h +++ b/ssl/ssl3.h @@ -462,6 +462,11 @@ typedef struct ssl3_state_st void *server_opaque_prf_input; size_t server_opaque_prf_input_len; +#ifndef OPENSSL_NO_NEXTPROTONEG + /* Set if we saw the Next Protocol Negotiation extension from our peer. */ + int next_proto_neg_seen; +#endif + struct { /* actually only needs to be 16+20 */ unsigned char cert_verify_md[EVP_MAX_MD_SIZE*2]; @@ -554,6 +559,8 @@ typedef struct ssl3_state_st #define SSL3_ST_CW_CERT_VRFY_B (0x191|SSL_ST_CONNECT) #define SSL3_ST_CW_CHANGE_A (0x1A0|SSL_ST_CONNECT) #define SSL3_ST_CW_CHANGE_B (0x1A1|SSL_ST_CONNECT) +#define SSL3_ST_CW_NEXT_PROTO_A (0x200|SSL_ST_CONNECT) +#define SSL3_ST_CW_NEXT_PROTO_B (0x201|SSL_ST_CONNECT) #define SSL3_ST_CW_FINISHED_A (0x1B0|SSL_ST_CONNECT) #define SSL3_ST_CW_FINISHED_B (0x1B1|SSL_ST_CONNECT) /* read from server */ @@ -601,6 +608,8 @@ typedef struct ssl3_state_st #define SSL3_ST_SR_CERT_VRFY_B (0x1A1|SSL_ST_ACCEPT) #define SSL3_ST_SR_CHANGE_A (0x1B0|SSL_ST_ACCEPT) #define SSL3_ST_SR_CHANGE_B (0x1B1|SSL_ST_ACCEPT) +#define SSL3_ST_SR_NEXT_PROTO_A (0x210|SSL_ST_ACCEPT) +#define SSL3_ST_SR_NEXT_PROTO_B (0x211|SSL_ST_ACCEPT) #define SSL3_ST_SR_FINISHED_A (0x1C0|SSL_ST_ACCEPT) #define SSL3_ST_SR_FINISHED_B (0x1C1|SSL_ST_ACCEPT) /* write to client */ @@ -625,6 +634,7 @@ typedef struct ssl3_state_st #define SSL3_MT_CLIENT_KEY_EXCHANGE 16 #define SSL3_MT_FINISHED 20 #define SSL3_MT_CERTIFICATE_STATUS 22 +#define SSL3_MT_NEXT_PROTO 67 #define DTLS1_MT_HELLO_VERIFY_REQUEST 3 diff --git a/ssl/ssl_err.c b/ssl/ssl_err.c index 895b00a973..59721a63ea 100644 --- a/ssl/ssl_err.c +++ b/ssl/ssl_err.c @@ -1,6 +1,6 @@ /* ssl/ssl_err.c */ /* ==================================================================== - * Copyright (c) 1999-2010 The OpenSSL Project. All rights reserved. + * Copyright (c) 1999-2011 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -155,6 +155,7 @@ static ERR_STRING_DATA SSL_str_functs[]= {ERR_FUNC(SSL_F_SSL3_GET_KEY_EXCHANGE), "SSL3_GET_KEY_EXCHANGE"}, {ERR_FUNC(SSL_F_SSL3_GET_MESSAGE), "SSL3_GET_MESSAGE"}, {ERR_FUNC(SSL_F_SSL3_GET_NEW_SESSION_TICKET), "SSL3_GET_NEW_SESSION_TICKET"}, +{ERR_FUNC(SSL_F_SSL3_GET_NEXT_PROTO), "SSL3_GET_NEXT_PROTO"}, {ERR_FUNC(SSL_F_SSL3_GET_RECORD), "SSL3_GET_RECORD"}, {ERR_FUNC(SSL_F_SSL3_GET_SERVER_CERTIFICATE), "SSL3_GET_SERVER_CERTIFICATE"}, {ERR_FUNC(SSL_F_SSL3_GET_SERVER_DONE), "SSL3_GET_SERVER_DONE"}, @@ -362,6 +363,8 @@ static ERR_STRING_DATA SSL_str_reasons[]= {ERR_REASON(SSL_R_EXCESSIVE_MESSAGE_SIZE),"excessive message size"}, {ERR_REASON(SSL_R_EXTRA_DATA_IN_MESSAGE) ,"extra data in message"}, {ERR_REASON(SSL_R_GOT_A_FIN_BEFORE_A_CCS),"got a fin before a ccs"}, +{ERR_REASON(SSL_R_GOT_NEXT_PROTO_BEFORE_A_CCS),"got next proto before a ccs"}, +{ERR_REASON(SSL_R_GOT_NEXT_PROTO_WITHOUT_EXTENSION),"got next proto without seeing extension"}, {ERR_REASON(SSL_R_HTTPS_PROXY_REQUEST) ,"https proxy request"}, {ERR_REASON(SSL_R_HTTP_REQUEST) ,"http request"}, {ERR_REASON(SSL_R_ILLEGAL_PADDING) ,"illegal padding"}, diff --git a/ssl/ssl_lib.c b/ssl/ssl_lib.c index 0a6cf3ad30..596d9b758b 100644 --- a/ssl/ssl_lib.c +++ b/ssl/ssl_lib.c @@ -353,6 +353,9 @@ SSL *SSL_new(SSL_CTX *ctx) s->tlsext_ocsp_resplen = -1; CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX); s->initial_ctx=ctx; +# ifndef OPENSSL_NO_NEXTPROTONEG + s->next_proto_negotiated = NULL; +# endif #endif s->verify_result=X509_V_OK; @@ -586,6 +589,11 @@ void SSL_free(SSL *s) kssl_ctx_free(s->kssl_ctx); #endif /* OPENSSL_NO_KRB5 */ +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + if (s->next_proto_negotiated) + OPENSSL_free(s->next_proto_negotiated); +#endif + OPENSSL_free(s); } @@ -1494,6 +1502,123 @@ int SSL_get_servername_type(const SSL *s) return TLSEXT_NAMETYPE_host_name; 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. + * + * The protocol data is assumed to be a vector of 8-bit, length prefixed byte + * strings. The length byte itself is not included in the length. A byte + * string of length 0 is invalid. No byte string may be truncated. + * + * The current, but experimental algorithm for selecting the protocol is: + * + * 1) If the server doesn't support NPN then this is indicated to the + * callback. In this case, the client application has to abort the connection + * or have a default application level protocol. + * + * 2) If the server supports NPN, but advertises an empty list then the + * client selects the first protcol in its list, but indicates via the + * API that this fallback case was enacted. + * + * 3) Otherwise, the client finds the first protocol in the server's list + * that it supports and selects this protocol. This is because it's + * assumed that the server has better information about which protocol + * a client should use. + * + * 4) If the client doesn't support any of the server's advertised + * protocols, then this is treated the same as case 2. + * + * It returns either + * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or + * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. + */ +int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, const unsigned char *server, unsigned int server_len, const unsigned char *client, unsigned int client_len) + { + unsigned int i, j; + const unsigned char *result; + int status = OPENSSL_NPN_UNSUPPORTED; + + /* For each protocol in server preference order, see if we support it. */ + for (i = 0; i < server_len; ) + { + for (j = 0; j < client_len; ) + { + if (server[i] == client[j] && + memcmp(&server[i+1], &client[j+1], server[i]) == 0) + { + /* We found a match */ + result = &server[i]; + status = OPENSSL_NPN_NEGOTIATED; + goto found; + } + j += client[j]; + j++; + } + i += server[i]; + i++; + } + + /* There's no overlap between our protocols and the server's list. */ + result = client; + status = OPENSSL_NPN_NO_OVERLAP; + + found: + *out = (unsigned char *) result + 1; + *outlen = result[0]; + return status; + } + +/* 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. + * + * Note that the client can request any protocol it chooses. The value returned + * from this function need not be a member of the list of supported protocols + * provided by the callback. + */ +void SSL_get0_next_proto_negotiated(con |