469 lines
11 KiB
C
469 lines
11 KiB
C
/* ssl/s3_both.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <openssl/buffer.h>
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#include <openssl/rand.h>
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#include <openssl/x509.h>
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#include "ssl_locl.h"
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int ssl3_send_finished(SSL *s, int a, int b, unsigned char *sender,
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int slen)
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{
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unsigned char *p,*d;
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int i;
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unsigned long l;
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if (s->state == a)
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{
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d=(unsigned char *)s->init_buf->data;
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p= &(d[4]);
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i=s->method->ssl3_enc->final_finish_mac(s,
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&(s->s3->finish_dgst1),
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&(s->s3->finish_dgst2),
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sender,slen,p);
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p+=i;
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l=i;
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#ifdef WIN16
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/* MSVC 1.5 does not clear the top bytes of the word unless
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* I do this.
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*/
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l&=0xffff;
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#endif
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*(d++)=SSL3_MT_FINISHED;
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l2n3(l,d);
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s->init_num=(int)l+4;
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s->init_off=0;
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s->state=b;
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}
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/* SSL3_ST_SEND_xxxxxx_HELLO_B */
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return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
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}
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int ssl3_get_finished(SSL *s, int a, int b)
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{
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int al,i,ok;
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long n;
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unsigned char *p;
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/* the mac has already been generated when we received the
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* change cipher spec message and is in s->s3->tmp.in_dgst[12]
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*/
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n=ssl3_get_message(s,
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a,
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b,
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SSL3_MT_FINISHED,
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64, /* should actually be 36+4 :-) */
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&ok);
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if (!ok) return((int)n);
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/* If this occurs if we has missed a message */
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if (!s->s3->change_cipher_spec)
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{
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al=SSL_AD_UNEXPECTED_MESSAGE;
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SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
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goto f_err;
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}
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s->s3->change_cipher_spec=0;
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p=(unsigned char *)s->init_buf->data;
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i=s->method->ssl3_enc->finish_mac_length;
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if (i != n)
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{
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al=SSL_AD_DECODE_ERROR;
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SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
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goto f_err;
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}
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if (memcmp( p, (char *)&(s->s3->tmp.finish_md[0]),i) != 0)
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{
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al=SSL_AD_DECRYPT_ERROR;
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SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
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goto f_err;
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}
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return(1);
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f_err:
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ssl3_send_alert(s,SSL3_AL_FATAL,al);
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return(0);
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}
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/* for these 2 messages, we need to
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* ssl->enc_read_ctx re-init
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* ssl->s3->read_sequence zero
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* ssl->s3->read_mac_secret re-init
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* ssl->session->read_sym_enc assign
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* ssl->session->read_compression assign
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* ssl->session->read_hash assign
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*/
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int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
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{
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unsigned char *p;
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if (s->state == a)
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{
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p=(unsigned char *)s->init_buf->data;
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*p=SSL3_MT_CCS;
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s->init_num=1;
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s->init_off=0;
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s->state=b;
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}
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/* SSL3_ST_CW_CHANGE_B */
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return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
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}
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unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
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{
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unsigned char *p;
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int n,i;
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unsigned long l=7;
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BUF_MEM *buf;
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X509_STORE_CTX xs_ctx;
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X509_OBJECT obj;
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/* TLSv1 sends a chain with nothing in it, instead of an alert */
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buf=s->init_buf;
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if (!BUF_MEM_grow(buf,(int)(10)))
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{
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SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
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return(0);
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}
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if (x != NULL)
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{
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X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL);
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for (;;)
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{
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n=i2d_X509(x,NULL);
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if (!BUF_MEM_grow(buf,(int)(n+l+3)))
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{
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SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
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return(0);
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}
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p=(unsigned char *)&(buf->data[l]);
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l2n3(n,p);
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i2d_X509(x,&p);
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l+=n+3;
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if (X509_NAME_cmp(X509_get_subject_name(x),
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X509_get_issuer_name(x)) == 0) break;
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i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509,
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X509_get_issuer_name(x),&obj);
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if (i <= 0) break;
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x=obj.data.x509;
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/* Count is one too high since the X509_STORE_get uped the
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* ref count */
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X509_free(x);
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}
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X509_STORE_CTX_cleanup(&xs_ctx);
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}
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/* Thawte special :-) */
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if (s->ctx->extra_certs != NULL)
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for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
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{
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x=sk_X509_value(s->ctx->extra_certs,i);
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n=i2d_X509(x,NULL);
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if (!BUF_MEM_grow(buf,(int)(n+l+3)))
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{
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SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
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return(0);
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}
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p=(unsigned char *)&(buf->data[l]);
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l2n3(n,p);
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i2d_X509(x,&p);
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l+=n+3;
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}
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l-=7;
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p=(unsigned char *)&(buf->data[4]);
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l2n3(l,p);
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l+=3;
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p=(unsigned char *)&(buf->data[0]);
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*(p++)=SSL3_MT_CERTIFICATE;
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l2n3(l,p);
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l+=4;
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return(l);
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}
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long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
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{
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unsigned char *p;
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unsigned long l;
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long n;
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int i,al;
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if (s->s3->tmp.reuse_message)
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{
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s->s3->tmp.reuse_message=0;
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if ((mt >= 0) && (s->s3->tmp.message_type != mt))
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{
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al=SSL_AD_UNEXPECTED_MESSAGE;
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SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
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goto f_err;
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}
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*ok=1;
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return((int)s->s3->tmp.message_size);
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}
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p=(unsigned char *)s->init_buf->data;
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if (s->state == st1)
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{
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i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],
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4-s->init_num);
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if (i < (4-s->init_num))
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{
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*ok=0;
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return(ssl3_part_read(s,i));
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}
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if ((mt >= 0) && (*p != mt))
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{
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al=SSL_AD_UNEXPECTED_MESSAGE;
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SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
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goto f_err;
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}
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s->s3->tmp.message_type= *(p++);
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n2l3(p,l);
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if (l > (unsigned long)max)
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{
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al=SSL_AD_ILLEGAL_PARAMETER;
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SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
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goto f_err;
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}
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if (l && !BUF_MEM_grow(s->init_buf,(int)l))
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{
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SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
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goto err;
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}
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s->s3->tmp.message_size=l;
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s->state=stn;
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s->init_num=0;
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}
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/* next state (stn) */
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p=(unsigned char *)s->init_buf->data;
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n=s->s3->tmp.message_size;
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if (n > 0)
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{
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i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n);
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if (i != (int)n)
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{
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*ok=0;
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return(ssl3_part_read(s,i));
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}
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}
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*ok=1;
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return(n);
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f_err:
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ssl3_send_alert(s,SSL3_AL_FATAL,al);
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err:
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*ok=0;
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return(-1);
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}
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int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
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{
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EVP_PKEY *pk;
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int ret= -1,i,j;
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if (pkey == NULL)
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pk=X509_get_pubkey(x);
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else
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pk=pkey;
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if (pk == NULL) goto err;
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i=pk->type;
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if (i == EVP_PKEY_RSA)
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{
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ret=SSL_PKEY_RSA_ENC;
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if (x != NULL)
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{
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j=X509_get_ext_count(x);
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/* check to see if this is a signing only certificate */
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/* EAY EAY EAY EAY */
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}
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}
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else if (i == EVP_PKEY_DSA)
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{
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ret=SSL_PKEY_DSA_SIGN;
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}
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else if (i == EVP_PKEY_DH)
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{
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/* if we just have a key, we needs to be guess */
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if (x == NULL)
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ret=SSL_PKEY_DH_DSA;
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else
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{
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j=X509_get_signature_type(x);
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if (j == EVP_PKEY_RSA)
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ret=SSL_PKEY_DH_RSA;
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else if (j== EVP_PKEY_DSA)
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ret=SSL_PKEY_DH_DSA;
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else ret= -1;
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}
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}
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else
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ret= -1;
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err:
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if(!pkey) EVP_PKEY_free(pk);
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return(ret);
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}
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int ssl_verify_alarm_type(long type)
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{
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int al;
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switch(type)
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{
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case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
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case X509_V_ERR_UNABLE_TO_GET_CRL:
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al=SSL_AD_UNKNOWN_CA;
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break;
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case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
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case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
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case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
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case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
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case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
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case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
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case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
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case X509_V_ERR_CERT_NOT_YET_VALID:
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case X509_V_ERR_CRL_NOT_YET_VALID:
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al=SSL_AD_BAD_CERTIFICATE;
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break;
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case X509_V_ERR_CERT_SIGNATURE_FAILURE:
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case X509_V_ERR_CRL_SIGNATURE_FAILURE:
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al=SSL_AD_DECRYPT_ERROR;
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break;
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case X509_V_ERR_CERT_HAS_EXPIRED:
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case X509_V_ERR_CRL_HAS_EXPIRED:
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al=SSL_AD_CERTIFICATE_EXPIRED;
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break;
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case X509_V_ERR_CERT_REVOKED:
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al=SSL_AD_CERTIFICATE_REVOKED;
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break;
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case X509_V_ERR_OUT_OF_MEM:
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al=SSL_AD_INTERNAL_ERROR;
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break;
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case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
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case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
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case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
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case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
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case X509_V_ERR_CERT_CHAIN_TOO_LONG:
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al=SSL_AD_UNKNOWN_CA;
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break;
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case X509_V_ERR_APPLICATION_VERIFICATION:
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al=SSL_AD_HANDSHAKE_FAILURE;
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break;
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default:
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al=SSL_AD_CERTIFICATE_UNKNOWN;
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break;
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}
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return(al);
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}
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int ssl3_setup_buffers(SSL *s)
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{
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unsigned char *p;
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unsigned int extra;
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if (s->s3->rbuf.buf == NULL)
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{
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if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
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extra=SSL3_RT_MAX_EXTRA;
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else
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extra=0;
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if ((p=(unsigned char *)Malloc(SSL3_RT_MAX_PACKET_SIZE+extra))
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== NULL)
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goto err;
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s->s3->rbuf.buf=p;
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}
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if (s->s3->wbuf.buf == NULL)
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{
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if ((p=(unsigned char *)Malloc(SSL3_RT_MAX_PACKET_SIZE))
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== NULL)
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goto err;
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s->s3->wbuf.buf=p;
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}
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s->packet= &(s->s3->rbuf.buf[0]);
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return(1);
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err:
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SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);
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return(0);
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}
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