X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fs3_srvr.c;h=85fa6849a2a9bd66907c26786605fce7eb8028dc;hp=4704dfb59867a918d817e04d5cb51b8ca479912c;hb=cbb92dfaf0ec4e4bc91e729c69847f56d40d8302;hpb=f9b3bff6f7e38960bb87a5623fbcbc45ee952c49 diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c index 4704dfb598..85fa6849a2 100644 --- a/ssl/s3_srvr.c +++ b/ssl/s3_srvr.c @@ -1,4 +1,4 @@ -/* ssl/s3_srvr.c */ +/* ssl/s3_srvr.c -*- mode:C; c-file-style: "eay" -*- */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * @@ -55,38 +55,122 @@ * copied and put under another distribution licence * [including the GNU Public Licence.] */ +/* ==================================================================== + * Copyright (c) 1998-2006 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 + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ +/* ==================================================================== + * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. + * + * Portions of the attached software ("Contribution") are developed by + * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. + * + * The Contribution is licensed pursuant to the OpenSSL open source + * license provided above. + * + * ECC cipher suite support in OpenSSL originally written by + * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. + * + */ +/* ==================================================================== + * Copyright 2005 Nokia. All rights reserved. + * + * The portions of the attached software ("Contribution") is developed by + * Nokia Corporation and is licensed pursuant to the OpenSSL open source + * license. + * + * The Contribution, originally written by Mika Kousa and Pasi Eronen of + * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites + * support (see RFC 4279) to OpenSSL. + * + * No patent licenses or other rights except those expressly stated in + * the OpenSSL open source license shall be deemed granted or received + * expressly, by implication, estoppel, or otherwise. + * + * No assurances are provided by Nokia that the Contribution does not + * infringe the patent or other intellectual property rights of any third + * party or that the license provides you with all the necessary rights + * to make use of the Contribution. + * + * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN + * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA + * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY + * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR + * OTHERWISE. + */ #define REUSE_CIPHER_BUG #define NETSCAPE_HANG_BUG - #include +#include "ssl_locl.h" +#include "kssl_lcl.h" #include #include #include -#include -#include #include #include -#include "ssl_locl.h" +#ifndef OPENSSL_NO_DH +#include +#endif +#include +#ifndef OPENSSL_NO_KRB5 +#include +#endif +#include + +static const SSL_METHOD *ssl3_get_server_method(int ver); -#ifndef NO_KRB5 -#include "kssl.h" -#endif /* NO_KRB5 */ - -static SSL_METHOD *ssl3_get_server_method(int ver); -static int ssl3_get_client_hello(SSL *s); -static int ssl3_check_client_hello(SSL *s); -static int ssl3_send_server_hello(SSL *s); -static int ssl3_send_server_key_exchange(SSL *s); -static int ssl3_send_certificate_request(SSL *s); -static int ssl3_send_server_done(SSL *s); -static int ssl3_get_client_key_exchange(SSL *s); -static int ssl3_get_client_certificate(SSL *s); -static int ssl3_get_cert_verify(SSL *s); -static int ssl3_send_hello_request(SSL *s); - -static SSL_METHOD *ssl3_get_server_method(int ver) +static const SSL_METHOD *ssl3_get_server_method(int ver) { if (ver == SSL3_VERSION) return(SSLv3_server_method()); @@ -94,27 +178,16 @@ static SSL_METHOD *ssl3_get_server_method(int ver) return(NULL); } -SSL_METHOD *SSLv3_server_method(void) - { - static int init=1; - static SSL_METHOD SSLv3_server_data; - - if (init) - { - memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(), - sizeof(SSL_METHOD)); - SSLv3_server_data.ssl_accept=ssl3_accept; - SSLv3_server_data.get_ssl_method=ssl3_get_server_method; - init=0; - } - return(&SSLv3_server_data); - } +IMPLEMENT_ssl3_meth_func(SSLv3_server_method, + ssl3_accept, + ssl_undefined_function, + ssl3_get_server_method) int ssl3_accept(SSL *s) { BUF_MEM *buf; - unsigned long l,Time=time(NULL); - void (*cb)()=NULL; + unsigned long l,Time=(unsigned long)time(NULL); + void (*cb)(const SSL *ssl,int type,int val)=NULL; long num1; int ret= -1; int new_state,state,skip=0; @@ -129,8 +202,8 @@ int ssl3_accept(SSL *s) cb=s->ctx->info_callback; /* init things to blank */ - if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); s->in_handshake++; + if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); if (s->cert == NULL) { @@ -158,7 +231,7 @@ int ssl3_accept(SSL *s) if ((s->version>>8) != 3) { - SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_INTERNAL_ERROR); + SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR); return -1; } s->type=SSL_ST_ACCEPT; @@ -184,21 +257,23 @@ int ssl3_accept(SSL *s) goto end; } - /* Ok, we now need to push on a buffering BIO so that - * the output is sent in a way that TCP likes :-) - */ - if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } - s->init_num=0; if (s->state != SSL_ST_RENEGOTIATE) { + /* Ok, we now need to push on a buffering BIO so that + * the output is sent in a way that TCP likes :-) + */ + if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } + ssl3_init_finished_mac(s); s->state=SSL3_ST_SR_CLNT_HELLO_A; s->ctx->stats.sess_accept++; } else { + /* s->state == SSL_ST_RENEGOTIATE, + * we will just send a HelloRequest */ s->ctx->stats.sess_accept_renegotiate++; s->state=SSL3_ST_SW_HELLO_REQ_A; } @@ -219,9 +294,7 @@ int ssl3_accept(SSL *s) case SSL3_ST_SW_HELLO_REQ_C: s->state=SSL_ST_OK; - ret=1; - goto end; - /* break; */ + break; case SSL3_ST_SR_CLNT_HELLO_A: case SSL3_ST_SR_CLNT_HELLO_B: @@ -230,6 +303,8 @@ int ssl3_accept(SSL *s) s->shutdown=0; ret=ssl3_get_client_hello(s); if (ret <= 0) goto end; + + s->new_session = 2; s->state=SSL3_ST_SW_SRVR_HELLO_A; s->init_num=0; break; @@ -248,8 +323,11 @@ int ssl3_accept(SSL *s) case SSL3_ST_SW_CERT_A: case SSL3_ST_SW_CERT_B: - /* Check if it is anon DH */ - if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) + /* Check if it is anon DH or anon ECDH, */ + /* normal PSK or KRB5 */ + if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL) + && !(s->s3->tmp.new_cipher->algorithms & SSL_kPSK) + && !(s->s3->tmp.new_cipher->algorithms & SSL_aKRB5)) { ret=ssl3_send_server_certificate(s); if (ret <= 0) goto end; @@ -267,18 +345,38 @@ int ssl3_accept(SSL *s) /* clear this, it may get reset by * send_server_key_exchange */ if ((s->options & SSL_OP_EPHEMERAL_RSA) -#ifndef NO_KRB5 +#ifndef OPENSSL_NO_KRB5 && !(l & SSL_KRB5) -#endif /* NO_KRB5 */ +#endif /* OPENSSL_NO_KRB5 */ ) + /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key + * even when forbidden by protocol specs + * (handshake may fail as clients are not required to + * be able to handle this) */ s->s3->tmp.use_rsa_tmp=1; else s->s3->tmp.use_rsa_tmp=0; + /* only send if a DH key exchange, fortezza or - * RSA but we have a sign only certificate */ + * RSA but we have a sign only certificate + * + * PSK: may send PSK identity hints + * + * For ECC ciphersuites, we send a serverKeyExchange + * message only if the cipher suite is either + * ECDH-anon or ECDHE. In other cases, the + * server certificate contains the server's + * public key for key exchange. + */ if (s->s3->tmp.use_rsa_tmp - || (l & (SSL_DH|SSL_kFZA)) + /* PSK: send ServerKeyExchange if PSK identity + * hint if provided */ +#ifndef OPENSSL_NO_PSK + || ((l & SSL_kPSK) && s->ctx->psk_identity_hint) +#endif + || (l & SSL_DH) + || (l & SSL_kEECDH) || ((l & SSL_kRSA) && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) @@ -312,7 +410,12 @@ int ssl3_accept(SSL *s) ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) && /* ... except when the application insists on verification * (against the specs, but s3_clnt.c accepts this for SSL 3) */ - !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))) + !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || + /* never request cert in Kerberos ciphersuites */ + (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) + /* With normal PSK Certificates and + * Certificate Requests are omitted */ + || (s->s3->tmp.new_cipher->algorithms & SSL_kPSK)) { /* no cert request */ skip=1; @@ -366,10 +469,11 @@ int ssl3_accept(SSL *s) if (ret == 2) s->state = SSL3_ST_SR_CLNT_HELLO_C; else { - /* could be sent for a DH cert, even if we - * have not asked for it :-) */ - ret=ssl3_get_client_certificate(s); - if (ret <= 0) goto end; + if (s->s3->tmp.cert_request) + { + ret=ssl3_get_client_certificate(s); + if (ret <= 0) goto end; + } s->init_num=0; s->state=SSL3_ST_SR_KEY_EXCH_A; } @@ -378,19 +482,33 @@ int ssl3_accept(SSL *s) case SSL3_ST_SR_KEY_EXCH_A: case SSL3_ST_SR_KEY_EXCH_B: ret=ssl3_get_client_key_exchange(s); - if (ret <= 0) goto end; - s->state=SSL3_ST_SR_CERT_VRFY_A; - s->init_num=0; - - /* We need to get hashes here so if there is - * a client cert, it can be verified */ - s->method->ssl3_enc->cert_verify_mac(s, - &(s->s3->finish_dgst1), - &(s->s3->tmp.cert_verify_md[0])); - s->method->ssl3_enc->cert_verify_mac(s, - &(s->s3->finish_dgst2), - &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH])); + if (ret <= 0) + goto end; + if (ret == 2) + { + /* For the ECDH ciphersuites when + * the client sends its ECDH pub key in + * a certificate, the CertificateVerify + * message is not sent. + */ + s->state=SSL3_ST_SR_FINISHED_A; + s->init_num = 0; + } + else + { + s->state=SSL3_ST_SR_CERT_VRFY_A; + s->init_num=0; + /* We need to get hashes here so if there is + * a client cert, it can be verified + */ + s->method->ssl3_enc->cert_verify_mac(s, + &(s->s3->finish_dgst1), + &(s->s3->tmp.cert_verify_md[0])); + s->method->ssl3_enc->cert_verify_mac(s, + &(s->s3->finish_dgst2), + &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH])); + } break; case SSL3_ST_SR_CERT_VRFY_A: @@ -464,18 +582,25 @@ int ssl3_accept(SSL *s) /* remove buffering on output */ ssl_free_wbio_buffer(s); - s->new_session=0; s->init_num=0; - ssl_update_cache(s,SSL_SESS_CACHE_SERVER); - - s->ctx->stats.sess_accept_good++; - /* s->server=1; */ - s->handshake_func=ssl3_accept; - ret=1; - - if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); - + if (s->new_session == 2) /* skipped if we just sent a HelloRequest */ + { + /* actually not necessarily a 'new' session unless + * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */ + + s->new_session=0; + + ssl_update_cache(s,SSL_SESS_CACHE_SERVER); + + s->ctx->stats.sess_accept_good++; + /* s->server=1; */ + s->handshake_func=ssl3_accept; + + if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); + } + + ret = 1; goto end; /* break; */ @@ -508,13 +633,13 @@ int ssl3_accept(SSL *s) end: /* BIO_flush(s->wbio); */ + s->in_handshake--; if (cb != NULL) cb(s,SSL_CB_ACCEPT_EXIT,ret); - s->in_handshake--; return(ret); } -static int ssl3_send_hello_request(SSL *s) +int ssl3_send_hello_request(SSL *s) { unsigned char *p; @@ -536,16 +661,18 @@ static int ssl3_send_hello_request(SSL *s) return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); } -static int ssl3_check_client_hello(SSL *s) +int ssl3_check_client_hello(SSL *s) { int ok; long n; - n=ssl3_get_message(s, + /* this function is called when we really expect a Certificate message, + * so permit appropriate message length */ + n=s->method->ssl_get_message(s, SSL3_ST_SR_CERT_A, SSL3_ST_SR_CERT_B, -1, - SSL3_RT_MAX_PLAIN_LENGTH, + s->max_cert_list, &ok); if (!ok) return((int)n); s->s3->tmp.reuse_message = 1; @@ -555,7 +682,7 @@ static int ssl3_check_client_hello(SSL *s) * which will now be aborted. (A full SSL_clear would be too much.) * I hope that tmp.dh is the only thing that may need to be cleared * when a handshake is not completed ... */ -#ifndef NO_DH +#ifndef OPENSSL_NO_DH if (s->s3->tmp.dh != NULL) { DH_free(s->s3->tmp.dh); @@ -567,14 +694,17 @@ static int ssl3_check_client_hello(SSL *s) return 1; } -static int ssl3_get_client_hello(SSL *s) +int ssl3_get_client_hello(SSL *s) { int i,j,ok,al,ret= -1; + unsigned int cookie_len; long n; unsigned long id; unsigned char *p,*d,*q; SSL_CIPHER *c; +#ifndef OPENSSL_NO_COMP SSL_COMP *comp=NULL; +#endif STACK_OF(SSL_CIPHER) *ciphers=NULL; /* We do this so that we will respond with our native type. @@ -588,7 +718,7 @@ static int ssl3_get_client_hello(SSL *s) s->first_packet=1; s->state=SSL3_ST_SR_CLNT_HELLO_B; } - n=ssl3_get_message(s, + n=s->method->ssl_get_message(s, SSL3_ST_SR_CLNT_HELLO_B, SSL3_ST_SR_CLNT_HELLO_C, SSL3_MT_CLIENT_HELLO, @@ -596,13 +726,25 @@ static int ssl3_get_client_hello(SSL *s) &ok); if (!ok) return((int)n); - d=p=(unsigned char *)s->init_buf->data; + d=p=(unsigned char *)s->init_msg; /* use version from inside client hello, not from record header * (may differ: see RFC 2246, Appendix E, second paragraph) */ s->client_version=(((int)p[0])<<8)|(int)p[1]; p+=2; + if (s->client_version < s->version) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER); + if ((s->client_version>>8) == SSL3_VERSION_MAJOR) + { + /* similar to ssl3_get_record, send alert using remote version number */ + s->version = s->client_version; + } + al = SSL_AD_PROTOCOL_VERSION; + goto f_err; + } + /* load the client random */ memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE); p+=SSL3_RANDOM_SIZE; @@ -611,7 +753,15 @@ static int ssl3_get_client_hello(SSL *s) j= *(p++); s->hit=0; - if (j == 0) + /* Versions before 0.9.7 always allow session reuse during renegotiation + * (i.e. when s->new_session is true), option + * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7. + * Maybe this optional behaviour should always have been the default, + * but we cannot safely change the default behaviour (or new applications + * might be written that become totally unsecure when compiled with + * an earlier library version) + */ + if (j == 0 || (s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) { if (!ssl_get_new_session(s,1)) goto err; @@ -633,6 +783,68 @@ static int ssl3_get_client_hello(SSL *s) } p+=j; + + if (SSL_version(s) == DTLS1_VERSION) + { + /* cookie stuff */ + cookie_len = *(p++); + + if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && + s->d1->send_cookie == 0) + { + /* HelloVerifyMessage has already been sent */ + if ( cookie_len != s->d1->cookie_len) + { + al = SSL_AD_HANDSHAKE_FAILURE; + SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); + goto f_err; + } + } + + /* + * The ClientHello may contain a cookie even if the + * HelloVerify message has not been sent--make sure that it + * does not cause an overflow. + */ + if ( cookie_len > sizeof(s->d1->rcvd_cookie)) + { + /* too much data */ + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); + goto f_err; + } + + /* verify the cookie if appropriate option is set. */ + if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && + cookie_len > 0) + { + memcpy(s->d1->rcvd_cookie, p, cookie_len); + + if ( s->ctx->app_verify_cookie_cb != NULL) + { + if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie, + cookie_len) == 0) + { + al=SSL_AD_HANDSHAKE_FAILURE; + SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, + SSL_R_COOKIE_MISMATCH); + goto f_err; + } + /* else cookie verification succeeded */ + } + else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie, + s->d1->cookie_len) != 0) /* default verification */ + { + al=SSL_AD_HANDSHAKE_FAILURE; + SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, + SSL_R_COOKIE_MISMATCH); + goto f_err; + } + } + + p += cookie_len; + } + n2s(p,i); if ((i == 0) && (j != 0)) { @@ -641,7 +853,7 @@ static int ssl3_get_client_hello(SSL *s) SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED); goto f_err; } - if ((i+p) > (d+n)) + if ((p+i) >= (d+n)) { /* not enough data */ al=SSL_AD_DECODE_ERROR; @@ -682,8 +894,7 @@ static int ssl3_get_client_hello(SSL *s) if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1)) { /* Very bad for multi-threading.... */ - s->session->cipher=sk_SSL_CIPHER_value(ciphers, - 0); + s->session->cipher=sk_SSL_CIPHER_value(ciphers, 0); } else { @@ -698,6 +909,13 @@ static int ssl3_get_client_hello(SSL *s) /* compression */ i= *(p++); + if ((p+i) > (d+n)) + { + /* not enough data */ + al=SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); + goto f_err; + } q=p; for (j=0; jversion > SSL3_VERSION) + { + if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al)) + { + /* 'al' set by ssl_parse_clienthello_tlsext */ + SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT); + goto f_err; + } + } + if (ssl_check_clienthello_tlsext(s) <= 0) { + SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_CLIENTHELLO_TLSEXT); + goto err; + } +#endif + /* Worst case, we will use the NULL compression, but if we have other * options, we will now look for them. We have i-1 compression * algorithms from the client, starting at q. */ s->s3->tmp.new_compression=NULL; - if (s->ctx->comp_methods != NULL) +#ifndef OPENSSL_NO_COMP + if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods) { /* See if we have a match */ int m,nn,o,v,done=0; @@ -741,26 +977,18 @@ static int ssl3_get_client_hello(SSL *s) else comp=NULL; } +#endif - /* TLS does not mind if there is extra stuff */ - if (s->version == SSL3_VERSION) - { - if (p > (d+n)) - { - /* wrong number of bytes, - * there could be more to follow */ - al=SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); - goto f_err; - } - } - - /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must + /* Given s->session->ciphers and SSL_get_ciphers, we must * pick a cipher */ if (!s->hit) { +#ifdef OPENSSL_NO_COMP + s->session->compress_meth=0; +#else s->session->compress_meth=(comp == NULL)?0:comp->id; +#endif if (s->session->ciphers != NULL) sk_SSL_CIPHER_free(s->session->ciphers); s->session->ciphers=ciphers; @@ -772,7 +1000,7 @@ static int ssl3_get_client_hello(SSL *s) } ciphers=NULL; c=ssl3_choose_cipher(s,s->session->ciphers, - ssl_get_ciphers_by_id(s)); + SSL_get_ciphers(s)); if (c == NULL) { @@ -835,7 +1063,7 @@ err: return(ret); } -static int ssl3_send_server_hello(SSL *s) +int ssl3_send_server_hello(SSL *s) { unsigned char *buf; unsigned char *p,*d; @@ -846,9 +1074,10 @@ static int ssl3_send_server_hello(SSL *s) { buf=(unsigned char *)s->init_buf->data; p=s->s3->server_random; - Time=time(NULL); /* Time */ + Time=(unsigned long)time(NULL); /* Time */ l2n(Time,p); - RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time)); + if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) + return -1; /* Do the message type and length last */ d=p= &(buf[4]); @@ -871,6 +1100,11 @@ static int ssl3_send_server_hello(SSL *s) s->session->session_id_length=0; sl=s->session->session_id_length; + if (sl > (int)sizeof(s->session->session_id)) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); + return -1; + } *(p++)=sl; memcpy(p,s->session->session_id,sl); p+=sl; @@ -880,10 +1114,26 @@ static int ssl3_send_server_hello(SSL *s) p+=i; /* put the compression method */ +#ifdef OPENSSL_NO_COMP + *(p++)=0; +#else if (s->s3->tmp.new_compression == NULL) *(p++)=0; else *(p++)=s->s3->tmp.new_compression->id; +#endif +#ifndef OPENSSL_NO_TLSEXT + if (ssl_prepare_serverhello_tlsext(s) <= 0) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); + return -1; + } + if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR); + return -1; + } +#endif /* do the header */ l=(p-d); @@ -901,7 +1151,7 @@ static int ssl3_send_server_hello(SSL *s) return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); } -static int ssl3_send_server_done(SSL *s) +int ssl3_send_server_done(SSL *s) { unsigned char *p; @@ -925,17 +1175,24 @@ static int ssl3_send_server_done(SSL *s) return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); } -static int ssl3_send_server_key_exchange(SSL *s) +int ssl3_send_server_key_exchange(SSL *s) { -#ifndef NO_RSA +#ifndef OPENSSL_NO_RSA unsigned char *q; int j,num; RSA *rsa; unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; unsigned int u; #endif -#ifndef NO_DH +#ifndef OPENSSL_NO_DH DH *dh=NULL,*dhp; +#endif +#ifndef OPENSSL_NO_ECDH + EC_KEY *ecdh=NULL, *ecdhp; + unsigned char *encodedPoint = NULL; + int encodedlen = 0; + int curve_id = 0; + BN_CTX *bn_ctx = NULL; #endif EVP_PKEY *pkey; unsigned char *p,*d; @@ -948,6 +1205,7 @@ static int ssl3_send_server_key_exchange(SSL *s) BUF_MEM *buf; EVP_MD_CTX md_ctx; + EVP_MD_CTX_init(&md_ctx); if (s->state == SSL3_ST_SW_KEY_EXCH_A) { type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK; @@ -957,7 +1215,7 @@ static int ssl3_send_server_key_exchange(SSL *s) r[0]=r[1]=r[2]=r[3]=NULL; n=0; -#ifndef NO_RSA +#ifndef OPENSSL_NO_RSA if (type & SSL_kRSA) { rsa=cert->rsa_tmp; @@ -972,7 +1230,7 @@ static int ssl3_send_server_key_exchange(SSL *s) SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); goto f_err; } - CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA); + RSA_up_ref(rsa); cert->rsa_tmp=rsa; } if (rsa == NULL) @@ -987,7 +1245,7 @@ static int ssl3_send_server_key_exchange(SSL *s) } else #endif -#ifndef NO_DH +#ifndef OPENSSL_NO_DH if (type & SSL_kEDH) { dhp=cert->dh_tmp; @@ -1005,7 +1263,7 @@ static int ssl3_send_server_key_exchange(SSL *s) if (s->s3->tmp.dh != NULL) { DH_free(dh); - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, SSL_R_INTERNAL_ERROR); + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } @@ -1044,6 +1302,142 @@ static int ssl3_send_server_key_exchange(SSL *s) } else #endif +#ifndef OPENSSL_NO_ECDH + if (type & SSL_kEECDH) + { + const EC_GROUP *group; + + ecdhp=cert->ecdh_tmp; + if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL)) + { + ecdhp=s->cert->ecdh_tmp_cb(s, + SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), + SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); + } + if (ecdhp == NULL) + { + al=SSL_AD_HANDSHAKE_FAILURE; + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); + goto f_err; + } + + if (s->s3->tmp.ecdh != NULL) + { + EC_KEY_free(s->s3->tmp.ecdh); + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + goto err; + } + + /* Duplicate the ECDH structure. */ + if (ecdhp == NULL) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); + goto err; + } + if (!EC_KEY_up_ref(ecdhp)) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); + goto err; + } + ecdh = ecdhp; + + s->s3->tmp.ecdh=ecdh; + if ((EC_KEY_get0_public_key(ecdh) == NULL) || + (EC_KEY_get0_private_key(ecdh) == NULL) || + (s->options & SSL_OP_SINGLE_ECDH_USE)) + { + if(!EC_KEY_generate_key(ecdh)) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); + goto err; + } + } + + if (((group = EC_KEY_get0_group(ecdh)) == NULL) || + (EC_KEY_get0_public_key(ecdh) == NULL) || + (EC_KEY_get0_private_key(ecdh) == NULL)) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); + goto err; + } + + if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && + (EC_GROUP_get_degree(group) > 163)) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); + goto err; + } + + /* XXX: For now, we only support ephemeral ECDH + * keys over named (not generic) curves. For + * supported named curves, curve_id is non-zero. + */ + if ((curve_id = + tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group))) + == 0) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); + goto err; + } + + /* Encode the public key. + * First check the size of encoding and + * allocate memory accordingly. + */ + encodedlen = EC_POINT_point2oct(group, + EC_KEY_get0_public_key(ecdh), + POINT_CONVERSION_UNCOMPRESSED, + NULL, 0, NULL); + + encodedPoint = (unsigned char *) + OPENSSL_malloc(encodedlen*sizeof(unsigned char)); + bn_ctx = BN_CTX_new(); + if ((encodedPoint == NULL) || (bn_ctx == NULL)) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); + goto err; + } + + + encodedlen = EC_POINT_point2oct(group, + EC_KEY_get0_public_key(ecdh), + POINT_CONVERSION_UNCOMPRESSED, + encodedPoint, encodedlen, bn_ctx); + + if (encodedlen == 0) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); + goto err; + } + + BN_CTX_free(bn_ctx); bn_ctx=NULL; + + /* XXX: For now, we only support named (not + * generic) curves in ECDH ephemeral key exchanges. + * In this situation, we need four additional bytes + * to encode the entire ServerECDHParams + * structure. + */ + n = 4 + encodedlen; + + /* We'll generate the serverKeyExchange message + * explicitly so we can set these to NULLs + */ + r[0]=NULL; + r[1]=NULL; + r[2]=NULL; + r[3]=NULL; + } + else +#endif /* !OPENSSL_NO_ECDH */ +#ifndef OPENSSL_NO_PSK + if (type & SSL_kPSK) + { + /* reserve size for record length and PSK identity hint*/ + n+=2+strlen(s->ctx->psk_identity_hint); + } + else +#endif /* !OPENSSL_NO_PSK */ { al=SSL_AD_HANDSHAKE_FAILURE; SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); @@ -1055,7 +1449,8 @@ static int ssl3_send_server_key_exchange(SSL *s) n+=2+nr[i]; } - if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) + if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL) + && !(s->s3->tmp.new_cipher->algorithms & SSL_kPSK)) { if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) == NULL) @@ -1071,7 +1466,7 @@ static int ssl3_send_server_key_exchange(SSL *s) kn=0; } - if (!BUF_MEM_grow(buf,n+4+kn)) + if (!BUF_MEM_grow_clean(buf,n+4+kn)) { SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); goto err; @@ -1086,24 +1481,59 @@ static int ssl3_send_server_key_exchange(SSL *s) p+=nr[i]; } +#ifndef OPENSSL_NO_ECDH + if (type & SSL_kEECDH) + { + /* XXX: For now, we only support named (not generic) curves. + * In this situation, the serverKeyExchange message has: + * [1 byte CurveType], [2 byte CurveName] + * [1 byte length of encoded point], followed by + * the actual encoded point itself + */ + *p = NAMED_CURVE_TYPE; + p += 1; + *p = 0; + p += 1; + *p = curve_id; + p += 1; + *p = encodedlen; + p += 1; + memcpy((unsigned char*)p, + (unsigned char *)encodedPoint, + encodedlen); + OPENSSL_free(encodedPoint); + p += encodedlen; + } +#endif + +#ifndef OPENSSL_NO_PSK + if (type & SSL_kPSK) + { + /* copy PSK identity hint */ + s2n(strlen(s->ctx->psk_identity_hint), p); + strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint)); + p+=strlen(s->ctx->psk_identity_hint); + } +#endif + /* not anonymous */ if (pkey != NULL) { /* n is the length of the params, they start at &(d[4]) * and p points to the space at the end. */ -#ifndef NO_RSA +#ifndef OPENSSL_NO_RSA if (pkey->type == EVP_PKEY_RSA) { q=md_buf; j=0; for (num=2; num > 0; num--) { - EVP_DigestInit(&md_ctx,(num == 2) - ?s->ctx->md5:s->ctx->sha1); + EVP_DigestInit_ex(&md_ctx,(num == 2) + ?s->ctx->md5:s->ctx->sha1, NULL); EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); EVP_DigestUpdate(&md_ctx,&(d[4]),n); - EVP_DigestFinal(&md_ctx,q, + EVP_DigestFinal_ex(&md_ctx,q, (unsigned int *)&i); q+=i; j+=i; @@ -1119,11 +1549,11 @@ static int ssl3_send_server_key_exchange(SSL *s) } else #endif -#if !defined(NO_DSA) +#if !defined(OPENSSL_NO_DSA) if (pkey->type == EVP_PKEY_DSA) { /* lets do DSS */ - EVP_SignInit(&md_ctx,EVP_dss1()); + EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL); EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); EVP_SignUpdate(&md_ctx,&(d[4]),n); @@ -1137,6 +1567,25 @@ static int ssl3_send_server_key_exchange(SSL *s) n+=i+2; } else +#endif +#if !defined(OPENSSL_NO_ECDSA) + if (pkey->type == EVP_PKEY_EC) + { + /* let's do ECDSA */ + EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL); + EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); + EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); + EVP_SignUpdate(&md_ctx,&(d[4]),n); + if (!EVP_SignFinal(&md_ctx,&(p[2]), + (unsigned int *)&i,pkey)) + { + SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA); + goto err; + } + s2n(i,p); + n+=i+2; + } + else #endif { /* Is this error check actually needed? */ @@ -1156,14 +1605,20 @@ static int ssl3_send_server_key_exchange(SSL *s) } s->state = SSL3_ST_SW_KEY_EXCH_B; + EVP_MD_CTX_cleanup(&md_ctx); return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); f_err: ssl3_send_alert(s,SSL3_AL_FATAL,al); err: +#ifndef OPENSSL_NO_ECDH + if (encodedPoint != NULL) OPENSSL_free(encodedPoint); + BN_CTX_free(bn_ctx); +#endif + EVP_MD_CTX_cleanup(&md_ctx); return(-1); } -static int ssl3_send_certificate_request(SSL *s) +int ssl3_send_certificate_request(SSL *s) { unsigned char *p,*d; int i,j,nl,off,n; @@ -1196,7 +1651,7 @@ static int ssl3_send_certificate_request(SSL *s) { name=sk_X509_NAME_value(sk,i); j=i2d_X509_NAME(name,NULL); - if (!BUF_MEM_grow(buf,4+n+j+2)) + if (!BUF_MEM_grow_clean(buf,4+n+j+2)) { SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); goto err; @@ -1243,6 +1698,7 @@ static int ssl3_send_certificate_request(SSL *s) s->init_num += 4; #endif + s->state = SSL3_ST_SW_CERT_REQ_B; } /* SSL3_ST_SW_CERT_REQ_B */ @@ -1251,25 +1707,32 @@ err: return(-1); } -static int ssl3_get_client_key_exchange(SSL *s) +int ssl3_get_client_key_exchange(SSL *s) { int i,al,ok; long n; unsigned long l; unsigned char *p; -#ifndef NO_RSA +#ifndef OPENSSL_NO_RSA RSA *rsa=NULL; EVP_PKEY *pkey=NULL; #endif -#ifndef NO_DH +#ifndef OPENSSL_NO_DH BIGNUM *pub=NULL; DH *dh_srvr; #endif -#ifndef NO_KRB5 +#ifndef OPENSSL_NO_KRB5 KSSL_ERR kssl_err; -#endif /* NO_KRB5 */ +#endif /* OPENSSL_NO_KRB5 */ - n=ssl3_get_message(s, +#ifndef OPENSSL_NO_ECDH + EC_KEY *srvr_ecdh = NULL; + EVP_PKEY *clnt_pub_pkey = NULL; + EC_POINT *clnt_ecpoint = NULL; + BN_CTX *bn_ctx = NULL; +#endif + + n=s->method->ssl_get_message(s, SSL3_ST_SR_KEY_EXCH_A, SSL3_ST_SR_KEY_EXCH_B, SSL3_MT_CLIENT_KEY_EXCHANGE, @@ -1277,11 +1740,11 @@ static int ssl3_get_client_key_exchange(SSL *s) &ok); if (!ok) return((int)n); - p=(unsigned char *)s->init_buf->data; + p=(unsigned char *)s->init_msg; l=s->s3->tmp.new_cipher->algorithms; -#ifndef NO_RSA +#ifndef OPENSSL_NO_RSA if (l & SSL_kRSA) { /* FIX THIS UP EAY EAY EAY EAY */ @@ -1333,14 +1796,15 @@ static int ssl3_get_client_key_exchange(SSL *s) i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING); + al = -1; + if (i != SSL_MAX_MASTER_KEY_LENGTH) { al=SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); - goto f_err; + /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */ } - if (!((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) + if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) { /* The premaster secret must contain the same version number as the * ClientHello to detect version rollback attacks (strangely, the @@ -1353,20 +1817,40 @@ static int ssl3_get_client_key_exchange(SSL *s) (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) { al=SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); - goto f_err; + /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */ + + /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack + * (http://eprint.iacr.org/2003/052/) exploits the version + * number check as a "bad version oracle" -- an alert would + * reveal that the plaintext corresponding to some ciphertext + * made up by the adversary is properly formatted except + * that the version number is wrong. To avoid such attacks, + * we should treat this just like any other decryption error. */ } } + if (al != -1) + { + /* Some decryption failure -- use random value instead as countermeasure + * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding + * (see RFC 2246, section 7.4.7.1). */ + ERR_clear_error(); + i = SSL_MAX_MASTER_KEY_LENGTH; + p[0] = s->client_version >> 8; + p[1] = s->client_version & 0xff; + if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */ + goto err; + } + s->session->master_key_length= s->method->ssl3_enc->generate_master_secret(s, s->session->master_key, p,i); - memset(p,0,i); + OPENSSL_cleanse(p,i); } else #endif -#ifndef NO_DH +#ifndef OPENSSL_NO_DH if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) { n2s(p,i); @@ -1425,19 +1909,82 @@ static int ssl3_get_client_key_exchange(SSL *s) s->session->master_key_length= s->method->ssl3_enc->generate_master_secret(s, s->session->master_key,p,i); + OPENSSL_cleanse(p,i); } else #endif -#ifndef NO_KRB5 +#ifndef OPENSSL_NO_KRB5 if (l & SSL_kKRB5) { - krb5_error_code krb5rc; - KSSL_CTX *kssl_ctx = s->kssl_ctx; + krb5_error_code krb5rc; + krb5_data enc_ticket; + krb5_data authenticator; + krb5_data enc_pms; + KSSL_CTX *kssl_ctx = s->kssl_ctx; + EVP_CIPHER_CTX ciph_ctx; + EVP_CIPHER *enc = NULL; + unsigned char iv[EVP_MAX_IV_LENGTH]; + unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH + + EVP_MAX_BLOCK_LENGTH]; + int padl, outl; + krb5_timestamp authtime = 0; + krb5_ticket_times ttimes; + + EVP_CIPHER_CTX_init(&ciph_ctx); if (!kssl_ctx) kssl_ctx = kssl_ctx_new(); - if ((krb5rc = kssl_sget_tkt(kssl_ctx, - s->init_buf->data, s->init_buf->length, - &kssl_err)) != 0) + + n2s(p,i); + enc_ticket.length = i; + + if (n < enc_ticket.length + 6) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DATA_LENGTH_TOO_LONG); + goto err; + } + + enc_ticket.data = (char *)p; + p+=enc_ticket.length; + + n2s(p,i); + authenticator.length = i; + + if (n < enc_ticket.length + authenticator.length + 6) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DATA_LENGTH_TOO_LONG); + goto err; + } + + authenticator.data = (char *)p; + p+=authenticator.length; + + n2s(p,i); + enc_pms.length = i; + enc_pms.data = (char *)p; + p+=enc_pms.length; + + /* Note that the length is checked again below, + ** after decryption + */ + if(enc_pms.length > sizeof pms) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DATA_LENGTH_TOO_LONG); + goto err; + } + + if (n != (long)(enc_ticket.length + authenticator.length + + enc_pms.length + 6)) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DATA_LENGTH_TOO_LONG); + goto err; + } + + if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes, + &kssl_err)) != 0) { #ifdef KSSL_DEBUG printf("kssl_sget_tkt rtn %d [%d]\n", @@ -1445,52 +1992,389 @@ static int ssl3_get_client_key_exchange(SSL *s) if (kssl_err.text) printf("kssl_err text= %s\n", kssl_err.text); #endif /* KSSL_DEBUG */ - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, kssl_err.reason); goto err; } + /* Note: no authenticator is not considered an error, + ** but will return authtime == 0. + */ + if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator, + &authtime, &kssl_err)) != 0) + { +#ifdef KSSL_DEBUG + printf("kssl_check_authent rtn %d [%d]\n", + krb5rc, kssl_err.reason); + if (kssl_err.text) + printf("kssl_err text= %s\n", kssl_err.text); +#endif /* KSSL_DEBUG */ + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + kssl_err.reason); + goto err; + } + + if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc); + goto err; + } + #ifdef KSSL_DEBUG kssl_ctx_show(kssl_ctx); #endif /* KSSL_DEBUG */ - /* 19991013 VRS - 3DES is kind of bogus here, - ** at least until Kerberos supports 3DES. The only - ** real secret is the 8-byte Kerberos session key; - ** the other key material (client_random, server_random) - ** could be sniffed. Nonces may help against replays though. - ** - ** Alternate code for Kerberos Purists: - ** - ** memcpy(s->session->master_key, kssl_ctx->key, kssl_ctx->length); - ** s->session->master_key_length = kssl_ctx->length; - */ + enc = kssl_map_enc(kssl_ctx->enctype); + if (enc == NULL) + goto err; + + memset(iv, 0, sizeof iv); /* per RFC 1510 */ + + if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv)) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DECRYPTION_FAILED); + goto err; + } + if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl, + (unsigned char *)enc_pms.data, enc_pms.length)) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DECRYPTION_FAILED); + goto err; + } + if (outl > SSL_MAX_MASTER_KEY_LENGTH) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DATA_LENGTH_TOO_LONG); + goto err; + } + if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl)) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DECRYPTION_FAILED); + goto err; + } + outl += padl; + if (outl > SSL_MAX_MASTER_KEY_LENGTH) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DATA_LENGTH_TOO_LONG); + goto err; + } + if (!((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) + { + /* The premaster secret must contain the same version number as the + * ClientHello to detect version rollback attacks (strangely, the + * protocol does not offer such protection for DH ciphersuites). + * However, buggy clients exist that send random bytes instead of + * the protocol version. + * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. + * (Perhaps we should have a separate BUG value for the Kerberos cipher) + */ + if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) && + (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_AD_DECODE_ERROR); + goto err; + } + } + + EVP_CIPHER_CTX_cleanup(&ciph_ctx); + s->session->master_key_length= s->method->ssl3_enc->generate_master_secret(s, - s->session->master_key, kssl_ctx->key, kssl_ctx->length); - /* Was doing kssl_ctx_free() here, but it caused problems for apache. - ** kssl_ctx = kssl_ctx_free(kssl_ctx); - ** if (s->kssl_ctx) s->kssl_ctx = NULL; + s->session->master_key, pms, outl); + + if (kssl_ctx->client_princ) + { + int len = strlen(kssl_ctx->client_princ); + if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH ) + { + s->session->krb5_client_princ_len = len; + memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len); + } + } + + + /* Was doing kssl_ctx_free() here, + ** but it caused problems for apache. + ** kssl_ctx = kssl_ctx_free(kssl_ctx); + ** if (s->kssl_ctx) s->kssl_ctx = NULL; */ } else -#endif /* NO_KRB5 */ +#endif /* OPENSSL_NO_KRB5 */ + +#ifndef OPENSSL_NO_ECDH + if ((l & SSL_kECDH) || (l & SSL_kEECDH)) + { + int ret = 1; + int field_size = 0; + const EC_KEY *tkey; + const EC_GROUP *group; + const BIGNUM *priv_key; + + /* initialize structures for server's ECDH key pair */ + if ((srvr_ecdh = EC_KEY_new()) == NULL) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_MALLOC_FAILURE); + goto err; + } + + /* Let's get server private key and group information */ + if (l & SSL_kECDH) + { + /* use the certificate */ + tkey = s->cert->key->privatekey->pkey.ec; + } + else + { + /* use the ephermeral values we saved when + * generating the ServerKeyExchange msg. + */ + tkey = s->s3->tmp.ecdh; + } + + group = EC_KEY_get0_group(tkey); + priv_key = EC_KEY_get0_private_key(tkey); + + if (!EC_KEY_set_group(srvr_ecdh, group) || + !EC_KEY_set_private_key(srvr_ecdh, priv_key)) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_EC_LIB); + goto err; + } + + /* Let's get client's public key */ + if ((clnt_ecpoint = EC_POINT_new(group)) == NULL) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_MALLOC_FAILURE); + goto err; + } + + if (n == 0L) + { + /* Client Publickey was in Client Certificate */ + + if (l & SSL_kEECDH) + { + al=SSL_AD_HANDSHAKE_FAILURE; + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); + goto f_err; + } + if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer)) + == NULL) || + (clnt_pub_pkey->type != EVP_PKEY_EC)) + { + /* XXX: For now, we do not support client + * authentication using ECDH certificates + * so this branch (n == 0L) of the code is + * never executed. When that support is + * added, we ought to ensure the key + * received in the certificate is + * authorized for key agreement. + * ECDH_compute_key implicitly checks that + * the two ECDH shares are for the same + * group. + */ + al=SSL_AD_HANDSHAKE_FAILURE; + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_UNABLE_TO_DECODE_ECDH_CERTS); + goto f_err; + } + + if (EC_POINT_copy(clnt_ecpoint, + EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_EC_LIB); + goto err; + } + ret = 2; /* Skip certificate verify processing */ + } + else + { + /* Get client's public key from encoded point + * in the ClientKeyExchange message. + */ + if ((bn_ctx = BN_CTX_new()) == NULL) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_MALLOC_FAILURE); + goto err; + } + + /* Get encoded point length */ + i = *p; + p += 1; + if (EC_POINT_oct2point(group, + clnt_ecpoint, p, i, bn_ctx) == 0) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_EC_LIB); + goto err; + } + /* p is pointing to somewhere in the buffer + * currently, so set it to the start + */ + p=(unsigned char *)s->init_buf->data; + } + + /* Compute the shared pre-master secret */ + field_size = EC_GROUP_get_degree(group); + if (field_size <= 0) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_ECDH_LIB); + goto err; + } + i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL); + if (i <= 0) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_ECDH_LIB); + goto err; + } + + EVP_PKEY_free(clnt_pub_pkey); + EC_POINT_free(clnt_ecpoint); + if (srvr_ecdh != NULL) + EC_KEY_free(srvr_ecdh); + BN_CTX_free(bn_ctx); + + /* Compute the master secret */ + s->session->master_key_length = s->method->ssl3_enc-> \ + generate_master_secret(s, s->session->master_key, p, i); + + OPENSSL_cleanse(p, i); + return (ret); + } + else +#endif +#ifndef OPENSSL_NO_PSK + if (l & SSL_kPSK) + { + unsigned char *t = NULL; + unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; + unsigned int pre_ms_len = 0, psk_len = 0; + int psk_err = 1; + char tmp_id[PSK_MAX_IDENTITY_LEN+1]; + + al=SSL_AD_HANDSHAKE_FAILURE; + + n2s(p,i); + if (n != i+2) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_LENGTH_MISMATCH); + goto psk_err; + } + if (i > PSK_MAX_IDENTITY_LEN) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_DATA_LENGTH_TOO_LONG); + goto psk_err; + } + if (s->psk_server_callback == NULL) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_PSK_NO_SERVER_CB); + goto psk_err; + } + + /* Create guaranteed NULL-terminated identity + * string for the callback */ + memcpy(tmp_id, p, i); + memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i); + psk_len = s->psk_server_callback(s, tmp_id, + psk_or_pre_ms, sizeof(psk_or_pre_ms)); + OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1); + + if (psk_len > PSK_MAX_PSK_LEN) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto psk_err; + } + else if (psk_len == 0) + { + /* PSK related to the given identity not found */ + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_PSK_IDENTITY_NOT_FOUND); + al=SSL_AD_UNKNOWN_PSK_IDENTITY; + goto psk_err; + } + + /* create PSK pre_master_secret */ + pre_ms_len=2+psk_len+2+psk_len; + t = psk_or_pre_ms; + memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); + s2n(psk_len, t); + memset(t, 0, psk_len); + t+=psk_len; + s2n(psk_len, t); + + if (s->session->psk_identity != NULL) + OPENSSL_free(s->session->psk_identity); + s->session->psk_identity = BUF_strdup((char *)p); + if (s->session->psk_identity == NULL) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_MALLOC_FAILURE); + goto psk_err; + } + + if (s->session->psk_identity_hint != NULL) + OPENSSL_free(s->session->psk_identity_hint); + s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); + if (s->ctx->psk_identity_hint != NULL && + s->session->psk_identity_hint == NULL) + { + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + ERR_R_MALLOC_FAILURE); + goto psk_err; + } + + s->session->master_key_length= + s->method->ssl3_enc->generate_master_secret(s, + s->session->master_key, psk_or_pre_ms, pre_ms_len); + psk_err = 0; + psk_err: + OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); + if (psk_err != 0) + goto f_err; + } + else +#endif { al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE); + SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, + SSL_R_UNKNOWN_CIPHER_TYPE); goto f_err; } return(1); f_err: ssl3_send_alert(s,SSL3_AL_FATAL,al); -#if !defined(NO_DH) || !defined(NO_RSA) +#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH) err: +#endif +#ifndef OPENSSL_NO_ECDH + EVP_PKEY_free(clnt_pub_pkey); + EC_POINT_free(clnt_ecpoint); + if (srvr_ecdh != NULL) + EC_KEY_free(srvr_ecdh); + BN_CTX_free(bn_ctx); #endif return(-1); } -static int ssl3_get_cert_verify(SSL *s) +int ssl3_get_cert_verify(SSL *s) { EVP_PKEY *pkey=NULL; unsigned char *p; @@ -1499,11 +2383,11 @@ static int ssl3_get_cert_verify(SSL *s) int type=0,i,j; X509 *peer; - n=ssl3_get_message(s, + n=s->method->ssl_get_message(s, SSL3_ST_SR_CERT_VRFY_A, SSL3_ST_SR_CERT_VRFY_B, -1, - 512, /* 512? */ + 514, /* 514? */ &ok); if (!ok) return((int)n); @@ -1555,7 +2439,7 @@ static int ssl3_get_cert_verify(SSL *s) } /* we now have a signature that we need to verify */ - p=(unsigned char *)s->init_buf->data; + p=(unsigned char *)s->init_msg; n2s(p,i); n-=2; if (i > n) @@ -1573,7 +2457,7 @@ static int ssl3_get_cert_verify(SSL *s) goto f_err; } -#ifndef NO_RSA +#ifndef OPENSSL_NO_RSA if (pkey->type == EVP_PKEY_RSA) { i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md, @@ -1594,7 +2478,7 @@ static int ssl3_get_cert_verify(SSL *s) } else #endif -#ifndef NO_DSA +#ifndef OPENSSL_NO_DSA if (pkey->type == EVP_PKEY_DSA) { j=DSA_verify(pkey->save_type, @@ -1609,9 +2493,26 @@ static int ssl3_get_cert_verify(SSL *s) } } else +#endif +#ifndef OPENSSL_NO_ECDSA + if (pkey->type == EVP_PKEY_EC) + { + j=ECDSA_verify(pkey->save_type, + &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), + SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec); + if (j <= 0) + { + /* bad signature */ + al=SSL_AD_DECRYPT_ERROR; + SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, + SSL_R_BAD_ECDSA_SIGNATURE); + goto f_err; + } + } + else #endif { - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR); + SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR); al=SSL_AD_UNSUPPORTED_CERTIFICATE; goto f_err; } @@ -1628,23 +2529,20 @@ end: return(ret); } -static int ssl3_get_client_certificate(SSL *s) +int ssl3_get_client_certificate(SSL *s) { int i,ok,al,ret= -1; X509 *x=NULL; unsigned long l,nc,llen,n; - unsigned char *p,*d,*q; + const unsigned char *p,*q; + unsigned char *d; STACK_OF(X509) *sk=NULL; - n=ssl3_get_message(s, + n=s->method->ssl_get_message(s, SSL3_ST_SR_CERT_A, SSL3_ST_SR_CERT_B, -1, -#if defined(MSDOS) && !defined(WIN32) - 1024*30, /* 30k max cert list :-) */ -#else - 1024*100, /* 100k max cert list :-) */ -#endif + s->max_cert_list, &ok); if (!ok) return((int)n); @@ -1675,7 +2573,7 @@ static int ssl3_get_client_certificate(SSL *s) SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE); goto f_err; } - d=p=(unsigned char *)s->init_buf->data; + p=d=(unsigned char *)s->init_msg; if ((sk=sk_X509_new_null()) == NULL) { @@ -1801,7 +2699,7 @@ int ssl3_send_server_certificate(SSL *s) & (SSL_MKEY_MASK|SSL_AUTH_MASK)) != (SSL_aKRB5|SSL_kKRB5)) { - SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR); + SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); return(0); }