X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fs23_clnt.c;h=3bb5adfa480dba6bfd8da2abdcd8ce8b5c364ce8;hp=61c74201355fb28c0b9488c9c45b56f1cedebc8e;hb=f1fd4544a3747682010ed89ac908713fe90b8304;hpb=6b691a5c85ddc4e407e32781841fee5c029506cd diff --git a/ssl/s23_clnt.c b/ssl/s23_clnt.c index 61c7420135..3bb5adfa48 100644 --- a/ssl/s23_clnt.c +++ b/ssl/s23_clnt.c @@ -55,31 +55,77 @@ * 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). + * + */ #include -#include "buffer.h" -#include "rand.h" -#include "objects.h" -#include "evp.h" #include "ssl_locl.h" +#include +#include +#include +#include -#define BREAK break - -#ifndef NOPROTO -static SSL_METHOD *ssl23_get_client_method(int ver); +static const SSL_METHOD *ssl23_get_client_method(int ver); static int ssl23_client_hello(SSL *s); static int ssl23_get_server_hello(SSL *s); -#else -static SSL_METHOD *ssl23_get_client_method(); -static int ssl23_client_hello(); -static int ssl23_get_server_hello(); -#endif - -static SSL_METHOD *ssl23_get_client_method(int ver) +static const SSL_METHOD *ssl23_get_client_method(int ver) { +#ifndef OPENSSL_NO_SSL2 if (ver == SSL2_VERSION) return(SSLv2_client_method()); - else if (ver == SSL3_VERSION) +#endif + if (ver == SSL3_VERSION) return(SSLv3_client_method()); else if (ver == TLS1_VERSION) return(TLSv1_client_method()); @@ -87,31 +133,20 @@ static SSL_METHOD *ssl23_get_client_method(int ver) return(NULL); } -SSL_METHOD *SSLv23_client_method(void) - { - static int init=1; - static SSL_METHOD SSLv23_client_data; - - if (init) - { - init=0; - memcpy((char *)&SSLv23_client_data, - (char *)sslv23_base_method(),sizeof(SSL_METHOD)); - SSLv23_client_data.ssl_connect=ssl23_connect; - SSLv23_client_data.get_ssl_method=ssl23_get_client_method; - } - return(&SSLv23_client_data); - } +IMPLEMENT_ssl23_meth_func(SSLv23_client_method, + ssl_undefined_function, + ssl23_connect, + ssl23_get_client_method) int ssl23_connect(SSL *s) { - BUF_MEM *buf; - unsigned long Time=time(NULL); - void (*cb)()=NULL; + BUF_MEM *buf=NULL; + unsigned long Time=(unsigned long)time(NULL); + void (*cb)(const SSL *ssl,int type,int val)=NULL; int ret= -1; int new_state,state; - RAND_seed(&Time,sizeof(Time)); + RAND_add(&Time,sizeof(Time),0); ERR_clear_error(); clear_sys_error(); @@ -120,8 +155,8 @@ int ssl23_connect(SSL *s) else if (s->ctx->info_callback != NULL) cb=s->ctx->info_callback; - 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); for (;;) { @@ -159,6 +194,7 @@ int ssl23_connect(SSL *s) goto end; } s->init_buf=buf; + buf=NULL; } if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } @@ -195,7 +231,7 @@ int ssl23_connect(SSL *s) /* break; */ } - if (s->debug) BIO_flush(s->wbio); + if (s->debug) { (void)BIO_flush(s->wbio); } if ((cb != NULL) && (s->state != state)) { @@ -207,6 +243,8 @@ int ssl23_connect(SSL *s) } end: s->in_handshake--; + if (buf != NULL) + BUF_MEM_free(buf); if (cb != NULL) cb(s,SSL_CB_CONNECT_EXIT,ret); return(ret); @@ -217,7 +255,27 @@ static int ssl23_client_hello(SSL *s) { unsigned char *buf; unsigned char *p,*d; - int i,ch_len; + int i,j,ch_len; + unsigned long Time,l; + int ssl2_compat; + int version = 0, version_major, version_minor; + SSL_COMP *comp; + int ret; + + ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1; + + if (!(s->options & SSL_OP_NO_TLSv1)) + { + version = TLS1_VERSION; + } + else if (!(s->options & SSL_OP_NO_SSLv3)) + { + version = SSL3_VERSION; + } + else if (!(s->options & SSL_OP_NO_SSLv2)) + { + version = SSL2_VERSION; + } buf=(unsigned char *)s->init_buf->data; if (s->state == SSL23_ST_CW_CLNT_HELLO_A) @@ -231,30 +289,25 @@ static int ssl23_client_hello(SSL *s) #endif p=s->s3->client_random; - RAND_bytes(p,SSL3_RANDOM_SIZE); + Time=(unsigned long)time(NULL); /* Time */ + l2n(Time,p); + if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) + return -1; - /* Do the message type and length last */ - d= &(buf[2]); - p=d+9; - - *(d++)=SSL2_MT_CLIENT_HELLO; - if (!(s->options & SSL_OP_NO_TLSv1)) + if (version == TLS1_VERSION) { - *(d++)=TLS1_VERSION_MAJOR; - *(d++)=TLS1_VERSION_MINOR; - s->client_version=TLS1_VERSION; + version_major = TLS1_VERSION_MAJOR; + version_minor = TLS1_VERSION_MINOR; } - else if (!(s->options & SSL_OP_NO_SSLv3)) + else if (version == SSL3_VERSION) { - *(d++)=SSL3_VERSION_MAJOR; - *(d++)=SSL3_VERSION_MINOR; - s->client_version=SSL3_VERSION; + version_major = SSL3_VERSION_MAJOR; + version_minor = SSL3_VERSION_MINOR; } - else if (!(s->options & SSL_OP_NO_SSLv2)) + else if (version == SSL2_VERSION) { - *(d++)=SSL2_VERSION_MAJOR; - *(d++)=SSL2_VERSION_MINOR; - s->client_version=SSL2_VERSION; + version_major = SSL2_VERSION_MAJOR; + version_minor = SSL2_VERSION_MINOR; } else { @@ -262,61 +315,173 @@ static int ssl23_client_hello(SSL *s) return(-1); } - /* Ciphers supported */ - i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p); - if (i == 0) + s->client_version = version; + + if (ssl2_compat) { - /* no ciphers */ - SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); - return(-1); - } - s2n(i,d); - p+=i; + /* create SSL 2.0 compatible Client Hello */ + + /* two byte record header will be written last */ + d = &(buf[2]); + p = d + 9; /* leave space for message type, version, individual length fields */ - /* put in the session-id, zero since there is no - * reuse. */ + *(d++) = SSL2_MT_CLIENT_HELLO; + *(d++) = version_major; + *(d++) = version_minor; + + /* Ciphers supported */ + i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0); + if (i == 0) + { + /* no ciphers */ + SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); + return -1; + } + s2n(i,d); + p+=i; + + /* put in the session-id length (zero since there is no reuse) */ #if 0 - s->session->session_id_length=0; + s->session->session_id_length=0; #endif - s2n(0,d); - - if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) - ch_len=SSL2_CHALLENGE_LENGTH; + s2n(0,d); + + if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) + ch_len=SSL2_CHALLENGE_LENGTH; + else + ch_len=SSL2_MAX_CHALLENGE_LENGTH; + + /* write out sslv2 challenge */ + if (SSL3_RANDOM_SIZE < ch_len) + i=SSL3_RANDOM_SIZE; + else + i=ch_len; + s2n(i,d); + memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE); + if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0) + return -1; + + memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); + p+=i; + + i= p- &(buf[2]); + buf[0]=((i>>8)&0xff)|0x80; + buf[1]=(i&0xff); + + /* number of bytes to write */ + s->init_num=i+2; + s->init_off=0; + + ssl3_finish_mac(s,&(buf[2]),i); + } else - ch_len=SSL2_MAX_CHALLENGE_LENGTH; + { + /* create Client Hello in SSL 3.0/TLS 1.0 format */ - /* write out sslv2 challenge */ - if (SSL3_RANDOM_SIZE < ch_len) - i=SSL3_RANDOM_SIZE; - else - i=ch_len; - s2n(i,d); - memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE); - RAND_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); - memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); - p+=i; + /* do the record header (5 bytes) and handshake message header (4 bytes) last */ + d = p = &(buf[9]); + + *(p++) = version_major; + *(p++) = version_minor; + + /* Random stuff */ + memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); + p += SSL3_RANDOM_SIZE; + + /* Session ID (zero since there is no reuse) */ + *(p++) = 0; + + /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ + i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char); + if (i == 0) + { + SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); + return -1; + } + s2n(i,p); + p+=i; + + /* COMPRESSION */ +#ifdef OPENSSL_NO_COMP + *(p++)=1; +#else + if ((s->options & SSL_OP_NO_COMPRESSION) + || !s->ctx->comp_methods) + j=0; + else + j=sk_SSL_COMP_num(s->ctx->comp_methods); + *(p++)=1+j; + for (i=0; ictx->comp_methods,i); + *(p++)=comp->id; + } +#endif + *(p++)=0; /* Add the NULL method */ - i= p- &(buf[2]); - buf[0]=((i>>8)&0xff)|0x80; - buf[1]=(i&0xff); +#ifndef OPENSSL_NO_TLSEXT + if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) + { + SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); + return -1; + } +#endif + + l = p-d; + + /* fill in 4-byte handshake header */ + d=&(buf[5]); + *(d++)=SSL3_MT_CLIENT_HELLO; + l2n3(l,d); + + l += 4; + + if (l > SSL3_RT_MAX_PLAIN_LENGTH) + { + SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); + return -1; + } + + /* fill in 5-byte record header */ + d=buf; + *(d++) = SSL3_RT_HANDSHAKE; + *(d++) = version_major; + *(d++) = version_minor; /* arguably we should send the *lowest* suported version here + * (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */ + s2n((int)l,d); + + /* number of bytes to write */ + s->init_num=p-buf; + s->init_off=0; + + ssl3_finish_mac(s,&(buf[5]), s->init_num - 5); + } s->state=SSL23_ST_CW_CLNT_HELLO_B; - /* number of bytes to write */ - s->init_num=i+2; s->init_off=0; - - ssl3_finish_mac(s,&(buf[2]),i); } /* SSL3_ST_CW_CLNT_HELLO_B */ - return(ssl23_write_bytes(s)); + ret = ssl23_write_bytes(s); + + if ((ret >= 2) && s->msg_callback) + { + /* Client Hello has been sent; tell msg_callback */ + + if (ssl2_compat) + s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg); + else + s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg); + } + + return ret; } static int ssl23_get_server_hello(SSL *s) { char buf[8]; unsigned char *p; - int i,ch_len; + int i; int n; n=ssl23_read_bytes(s,7); @@ -329,9 +494,14 @@ static int ssl23_get_server_hello(SSL *s) if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) && (p[5] == 0x00) && (p[6] == 0x02)) { +#ifdef OPENSSL_NO_SSL2 + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); + goto err; +#else /* we are talking sslv2 */ /* we need to clean up the SSLv3 setup and put in the * sslv2 stuff. */ + int ch_len; if (s->options & SSL_OP_NO_SSLv2) { @@ -360,7 +530,7 @@ static int ssl23_get_server_hello(SSL *s) if (s->s3 != NULL) ssl3_free(s); - if (!BUF_MEM_grow(s->init_buf, + if (!BUF_MEM_grow_clean(s->init_buf, SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); @@ -368,7 +538,9 @@ static int ssl23_get_server_hello(SSL *s) } s->state=SSL2_ST_GET_SERVER_HELLO_A; - s->s2->ssl2_rollback=1; + if (!(s->client_version == SSL2_VERSION)) + /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */ + s->s2->ssl2_rollback=1; /* setup the 5 bytes we have read so we get them from * the sslv2 buffer */ @@ -384,6 +556,7 @@ static int ssl23_get_server_hello(SSL *s) s->method=SSLv2_client_method(); s->handshake_func=s->method->ssl_connect; +#endif } else if ((p[0] == SSL3_RT_HANDSHAKE) && (p[1] == SSL3_VERSION_MAJOR) && @@ -434,7 +607,7 @@ static int ssl23_get_server_hello(SSL *s) (p[3] == 0) && (p[4] == 2)) { - void (*cb)()=NULL; + void (*cb)(const SSL *ssl,int type,int val)=NULL; int j; /* An alert */