diff options
author | Ralf S. Engelschall <rse@openssl.org> | 1998-12-21 10:52:47 +0000 |
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committer | Ralf S. Engelschall <rse@openssl.org> | 1998-12-21 10:52:47 +0000 |
commit | d02b48c63a58ea4367a0e905979f140b7d090f86 (patch) | |
tree | 504f62ed3d84799f785b9cd9fab255a21b0e1b0e /ssl/s23_clnt.c | |
download | openssl-d02b48c63a58ea4367a0e905979f140b7d090f86.tar.gz |
Import of old SSLeay release: SSLeay 0.8.1b
Diffstat (limited to 'ssl/s23_clnt.c')
-rw-r--r-- | ssl/s23_clnt.c | 444 |
1 files changed, 444 insertions, 0 deletions
diff --git a/ssl/s23_clnt.c b/ssl/s23_clnt.c new file mode 100644 index 0000000000..57d3623f3f --- /dev/null +++ b/ssl/s23_clnt.c @@ -0,0 +1,444 @@ +/* ssl/s23_clnt.c */ +/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * 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 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 acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS 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 AUTHOR OR 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. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include "buffer.h" +#include "rand.h" +#include "objects.h" +#include "evp.h" +#include "ssl_locl.h" + +#define BREAK break + +#ifndef NOPROTO +static int ssl23_client_hello(SSL *s); +static int ssl23_get_server_hello(SSL *s); +#else +static int ssl23_client_hello(); +static int ssl23_get_server_hello(); +#endif + +static SSL_METHOD *ssl23_get_client_method(ver) +int ver; + { + if (ver == 2) + return(SSLv2_client_method()); + else if (ver == 3) + return(SSLv3_client_method()); + else + return(NULL); + } + +SSL_METHOD *SSLv23_client_method() + { + 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); + } + +int ssl23_connect(s) +SSL *s; + { + BUF_MEM *buf; + unsigned long Time=time(NULL); + void (*cb)()=NULL; + int ret= -1; + int new_state,state; + + RAND_seed((unsigned char *)&Time,sizeof(Time)); + ERR_clear_error(); + errno=0; + + if (s->info_callback != NULL) + cb=s->info_callback; + 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++; + + for (;;) + { + state=s->state; + + switch(s->state) + { + case SSL_ST_BEFORE: + case SSL_ST_CONNECT: + case SSL_ST_BEFORE|SSL_ST_CONNECT: + case SSL_ST_OK|SSL_ST_CONNECT: + + if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); + + s->version=3; + s->type=SSL_ST_CONNECT; + + if (s->init_buf == NULL) + { + if ((buf=BUF_MEM_new()) == NULL) + { + ret= -1; + goto end; + } + if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) + { + ret= -1; + goto end; + } + s->init_buf=buf; + } + + if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } + + ssl3_init_finished_mac(s); + + s->state=SSL23_ST_CW_CLNT_HELLO_A; + s->ctx->sess_connect++; + s->init_num=0; + break; + + case SSL23_ST_CW_CLNT_HELLO_A: + case SSL23_ST_CW_CLNT_HELLO_B: + + s->shutdown=0; + ret=ssl23_client_hello(s); + if (ret <= 0) goto end; + s->state=SSL23_ST_CR_SRVR_HELLO_A; + s->init_num=0; + + break; + + case SSL23_ST_CR_SRVR_HELLO_A: + case SSL23_ST_CR_SRVR_HELLO_B: + ret=ssl23_get_server_hello(s); + if (ret >= 0) cb=NULL; + goto end; + break; + + default: + SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE); + ret= -1; + goto end; + /* break; */ + } + + if (s->debug) BIO_flush(s->wbio); + + if ((cb != NULL) && (s->state != state)) + { + new_state=s->state; + s->state=state; + cb(s,SSL_CB_CONNECT_LOOP,1); + s->state=new_state; + } + } +end: + s->in_handshake--; + if (cb != NULL) + cb(s,SSL_CB_CONNECT_EXIT,ret); + return(ret); + } + + +static int ssl23_client_hello(s) +SSL *s; + { + unsigned char *buf; + unsigned char *p,*d; + int i,ch_len; + + buf=(unsigned char *)s->init_buf->data; + if (s->state == SSL23_ST_CW_CLNT_HELLO_A) + { +#if 0 + /* don't reuse session-id's */ + if (!ssl_get_new_session(s,0)) + { + return(-1); + } +#endif + + p=s->s3->client_random; + RAND_bytes(p,SSL3_RANDOM_SIZE); + + /* Do the message type and length last */ + d= &(buf[2]); + p=d+9; + + *(d++)=SSL2_MT_CLIENT_HELLO; + *(d++)=SSL3_VERSION_MAJOR; + *(d++)=SSL3_VERSION_MINOR; + + /* Ciphers supported */ + i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p); + 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, zero since there is no + * reuse. */ +#if 0 + s->session->session_id_length=0; +#endif + s2n(0,d); + + if (s->ctx->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); + RAND_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); + 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); + + 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)); + } + +static int ssl23_get_server_hello(s) +SSL *s; + { + char buf[8]; + unsigned char *p; + int i,ch_len; + int n; + BIO *bbio; + + n=ssl23_read_bytes(s,7); + + if (n != 7) return(n); + p=s->packet; + + memcpy(buf,p,n); + + if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) && + (p[5] == 0x00) && (p[6] == 0x02)) + { + /* we are talking sslv2 */ + /* we need to clean up the SSLv3 setup and put in the + * sslv2 stuff. */ + + if (s->s2 == NULL) + { + if (!ssl2_new(s)) + goto err; + } + else + ssl2_clear(s); + + if (s->ctx->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) + ch_len=SSL2_CHALLENGE_LENGTH; + else + ch_len=SSL2_MAX_CHALLENGE_LENGTH; + + /* write out sslv2 challenge */ + i=(SSL3_RANDOM_SIZE < ch_len) + ?SSL3_RANDOM_SIZE:ch_len; + s->s2->challenge_length=i; + memcpy(s->s2->challenge, + &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); + + if (s->s3 != NULL) ssl3_free(s); + + if (!BUF_MEM_grow(s->init_buf, + SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) + { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); + goto err; + } + + s->state=SSL2_ST_GET_SERVER_HELLO_A; + s->s2->ssl2_rollback=1; + + /* setup the 5 bytes we have read so we get them from + * the sslv2 buffer */ + s->rstate=SSL_ST_READ_HEADER; + s->packet_length=n; + s->packet= &(s->s2->rbuf[0]); + memcpy(s->packet,buf,n); + s->s2->rbuf_left=n; + s->s2->rbuf_offs=0; + + /* we have already written one */ + s->s2->write_sequence=1; + + s->method=SSLv2_client_method(); + s->handshake_func=s->method->ssl_connect; + } + else if ((p[0] == SSL3_RT_HANDSHAKE) && + (p[1] == SSL3_VERSION_MAJOR) && + (p[2] == SSL3_VERSION_MINOR) && + (p[5] == SSL3_MT_SERVER_HELLO)) + { + /* we have sslv3 */ + + if (s->bbio == NULL) + { + bbio=BIO_new(BIO_f_buffer()); + if (bbio == NULL) + { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); + goto err; + } + s->bbio=bbio; + } + else + bbio=s->bbio; + + BIO_reset(bbio); + if (!BIO_set_write_buffer_size(bbio,16*1024)) + { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); + goto err; + } + + /* start the buffering */ + s->wbio=BIO_push(s->bbio,s->wbio); + + /* we are in this state */ + s->state=SSL3_ST_CR_SRVR_HELLO_A; + + /* put the 5 bytes we have read into the input buffer + * for SSLv3 */ + s->rstate=SSL_ST_READ_HEADER; + s->packet_length=n; + s->packet= &(s->s3->rbuf.buf[0]); + memcpy(s->packet,buf,n); + s->s3->rbuf.left=n; + s->s3->rbuf.offset=0; + + s->method=SSLv3_client_method(); + s->handshake_func=s->method->ssl_connect; + } + else if ((p[0] == SSL3_RT_ALERT) && + (p[1] == SSL3_VERSION_MAJOR) && + (p[2] == SSL3_VERSION_MINOR) && + (p[3] == 0) && + (p[4] == 2)) + { + void (*cb)()=NULL; + int j; + + /* An alert */ + if (s->info_callback != NULL) + cb=s->info_callback; + else if (s->ctx->info_callback != NULL) + cb=s->ctx->info_callback; + + i=p[5]; + if (cb != NULL) + { + j=(i<<8)|p[6]; + cb(s,SSL_CB_READ_ALERT,j); + } + + s->rwstate=SSL_NOTHING; + SSLerr(SSL_F_SSL3_READ_BYTES,1000+p[6]); + goto err; + } + else + { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL); + goto err; + } + s->init_num=0; + + /* Since, if we are sending a ssl23 client hello, we are not + * reusing a session-id */ + if (!ssl_get_new_session(s,0)) + goto err; + + s->first_packet=1; + return(SSL_connect(s)); +err: + return(-1); + } + |