328 lines
10 KiB
C
328 lines
10 KiB
C
/* ssl/ssl_asn1.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 <stdlib.h>
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#include <openssl/asn1_mac.h>
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#include <openssl/objects.h>
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#include "ssl_locl.h"
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typedef struct ssl_session_asn1_st
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{
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ASN1_INTEGER version;
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ASN1_INTEGER ssl_version;
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ASN1_OCTET_STRING cipher;
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ASN1_OCTET_STRING master_key;
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ASN1_OCTET_STRING session_id;
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ASN1_OCTET_STRING session_id_context;
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ASN1_OCTET_STRING key_arg;
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ASN1_INTEGER time;
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ASN1_INTEGER timeout;
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} SSL_SESSION_ASN1;
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int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
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{
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#define LSIZE2 (sizeof(long)*2)
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int v1=0,v2=0,v3=0,v4=0;
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unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
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unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2];
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long l;
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SSL_SESSION_ASN1 a;
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M_ASN1_I2D_vars(in);
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if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
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return(0);
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/* Note that I cheat in the following 2 assignments. I know
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* that if the ASN1_INTERGER passed to ASN1_INTEGER_set
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* is > sizeof(long)+1, the buffer will not be re-Malloc()ed.
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* This is a bit evil but makes things simple, no dynamic allocation
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* to clean up :-) */
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a.version.length=LSIZE2;
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a.version.type=V_ASN1_INTEGER;
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a.version.data=ibuf1;
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ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
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a.ssl_version.length=LSIZE2;
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a.ssl_version.type=V_ASN1_INTEGER;
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a.ssl_version.data=ibuf2;
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ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
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a.cipher.type=V_ASN1_OCTET_STRING;
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a.cipher.data=buf;
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if (in->cipher == NULL)
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l=in->cipher_id;
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else
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l=in->cipher->id;
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if (in->ssl_version == SSL2_VERSION)
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{
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a.cipher.length=3;
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buf[0]=((unsigned char)(l>>16L))&0xff;
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buf[1]=((unsigned char)(l>> 8L))&0xff;
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buf[2]=((unsigned char)(l ))&0xff;
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}
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else
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{
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a.cipher.length=2;
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buf[0]=((unsigned char)(l>>8L))&0xff;
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buf[1]=((unsigned char)(l ))&0xff;
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}
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a.master_key.length=in->master_key_length;
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a.master_key.type=V_ASN1_OCTET_STRING;
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a.master_key.data=in->master_key;
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a.session_id.length=in->session_id_length;
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a.session_id.type=V_ASN1_OCTET_STRING;
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a.session_id.data=in->session_id;
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a.session_id_context.length=in->sid_ctx_length;
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a.session_id_context.type=V_ASN1_OCTET_STRING;
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a.session_id_context.data=in->sid_ctx;
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a.key_arg.length=in->key_arg_length;
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a.key_arg.type=V_ASN1_OCTET_STRING;
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a.key_arg.data=in->key_arg;
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if (in->time != 0L)
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{
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a.time.length=LSIZE2;
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a.time.type=V_ASN1_INTEGER;
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a.time.data=ibuf3;
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ASN1_INTEGER_set(&(a.time),in->time);
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}
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if (in->timeout != 0L)
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{
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a.timeout.length=LSIZE2;
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a.timeout.type=V_ASN1_INTEGER;
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a.timeout.data=ibuf4;
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ASN1_INTEGER_set(&(a.timeout),in->timeout);
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}
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M_ASN1_I2D_len(&(a.version), i2d_ASN1_INTEGER);
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M_ASN1_I2D_len(&(a.ssl_version), i2d_ASN1_INTEGER);
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M_ASN1_I2D_len(&(a.cipher), i2d_ASN1_OCTET_STRING);
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M_ASN1_I2D_len(&(a.session_id), i2d_ASN1_OCTET_STRING);
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M_ASN1_I2D_len(&(a.master_key), i2d_ASN1_OCTET_STRING);
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if (in->key_arg_length > 0)
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M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
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if (in->time != 0L)
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M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
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if (in->timeout != 0L)
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M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
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if (in->peer != NULL)
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M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
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M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
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M_ASN1_I2D_seq_total();
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M_ASN1_I2D_put(&(a.version), i2d_ASN1_INTEGER);
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M_ASN1_I2D_put(&(a.ssl_version), i2d_ASN1_INTEGER);
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M_ASN1_I2D_put(&(a.cipher), i2d_ASN1_OCTET_STRING);
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M_ASN1_I2D_put(&(a.session_id), i2d_ASN1_OCTET_STRING);
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M_ASN1_I2D_put(&(a.master_key), i2d_ASN1_OCTET_STRING);
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if (in->key_arg_length > 0)
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M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
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if (in->time != 0L)
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M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
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if (in->timeout != 0L)
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M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
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if (in->peer != NULL)
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M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
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M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
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v4);
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M_ASN1_I2D_finish();
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}
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SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp,
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long length)
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{
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int version,ssl_version=0,i;
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long id;
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ASN1_INTEGER ai,*aip;
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ASN1_OCTET_STRING os,*osp;
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M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
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aip= &ai;
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osp= &os;
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M_ASN1_D2I_Init();
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M_ASN1_D2I_start_sequence();
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ai.data=NULL; ai.length=0;
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M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
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version=(int)ASN1_INTEGER_get(aip);
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if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; }
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/* we don't care about the version right now :-) */
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M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
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ssl_version=(int)ASN1_INTEGER_get(aip);
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ret->ssl_version=ssl_version;
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if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; }
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os.data=NULL; os.length=0;
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M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
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if (ssl_version == SSL2_VERSION)
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{
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if (os.length != 3)
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{
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c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
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goto err;
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}
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id=0x02000000L|
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((unsigned long)os.data[0]<<16L)|
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((unsigned long)os.data[1]<< 8L)|
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(unsigned long)os.data[2];
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}
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else if ((ssl_version>>8) == 3)
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{
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if (os.length != 2)
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{
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c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
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goto err;
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}
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id=0x03000000L|
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((unsigned long)os.data[0]<<8L)|
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(unsigned long)os.data[1];
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}
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else
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{
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SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
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return(NULL);
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}
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ret->cipher=NULL;
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ret->cipher_id=id;
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M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
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if ((ssl_version>>8) == SSL3_VERSION)
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i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
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else /* if (ssl_version == SSL2_VERSION) */
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i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
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if (os.length > i)
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os.length=i;
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ret->session_id_length=os.length;
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memcpy(ret->session_id,os.data,os.length);
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M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
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if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
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ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
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else
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ret->master_key_length=os.length;
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memcpy(ret->master_key,os.data,ret->master_key_length);
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os.length=0;
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M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
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if (os.length > SSL_MAX_KEY_ARG_LENGTH)
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ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
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else
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ret->key_arg_length=os.length;
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memcpy(ret->key_arg,os.data,ret->key_arg_length);
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if (os.data != NULL) Free(os.data);
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ai.length=0;
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M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
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if (ai.data != NULL)
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{
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ret->time=ASN1_INTEGER_get(aip);
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Free(ai.data); ai.data=NULL; ai.length=0;
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}
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else
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ret->time=time(NULL);
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ai.length=0;
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M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
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if (ai.data != NULL)
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{
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ret->timeout=ASN1_INTEGER_get(aip);
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Free(ai.data); ai.data=NULL; ai.length=0;
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}
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else
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ret->timeout=3;
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if (ret->peer != NULL)
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{
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X509_free(ret->peer);
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ret->peer=NULL;
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}
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M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
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os.length=0;
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os.data=NULL;
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M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
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if(os.data != NULL)
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{
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if (os.length > SSL_MAX_SID_CTX_LENGTH)
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SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
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ret->sid_ctx_length=os.length;
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memcpy(ret->sid_ctx,os.data,os.length);
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Free(os.data); os.data=NULL; os.length=0;
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}
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else
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ret->sid_ctx_length=0;
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M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
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}
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