2754597013
I have tried to convert 'len' type variable declarations to unsigned as a means to address these warnings when appropriate, but when in doubt I have used casts in the comparisons instead. The better solution (that would get us all lynched by API users) would be to go through and convert all the function prototypes and structure definitions to use unsigned variables except when signed is necessary. The proliferation of (signed) "int" for strictly non-negative uses is unfortunate.
399 lines
12 KiB
C
399 lines
12 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 "ssl_locl.h"
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#include <openssl/asn1_mac.h>
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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#include "cryptlib.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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#ifndef OPENSSL_NO_KRB5
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ASN1_OCTET_STRING krb5_princ;
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#endif /* OPENSSL_NO_KRB5 */
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ASN1_INTEGER time;
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ASN1_INTEGER timeout;
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ASN1_INTEGER verify_result;
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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,v5=0;
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unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
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unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[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_INTEGER passed to ASN1_INTEGER_set
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* is > sizeof(long)+1, the buffer will not be re-OPENSSL_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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#ifndef OPENSSL_NO_KRB5
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if (in->krb5_client_princ_len)
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{
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a.krb5_princ.length=in->krb5_client_princ_len;
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a.krb5_princ.type=V_ASN1_OCTET_STRING;
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a.krb5_princ.data=in->krb5_client_princ;
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}
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#endif /* OPENSSL_NO_KRB5 */
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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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if (in->verify_result != X509_V_OK)
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{
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a.verify_result.length=LSIZE2;
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a.verify_result.type=V_ASN1_INTEGER;
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a.verify_result.data=ibuf5;
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ASN1_INTEGER_set(&a.verify_result,in->verify_result);
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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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#ifndef OPENSSL_NO_KRB5
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if (in->krb5_client_princ_len)
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M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
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#endif /* OPENSSL_NO_KRB5 */
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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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if (in->verify_result != X509_V_OK)
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M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
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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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#ifndef OPENSSL_NO_KRB5
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if (in->krb5_client_princ_len)
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M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
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#endif /* OPENSSL_NO_KRB5 */
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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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if (in->verify_result != X509_V_OK)
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M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
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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) { OPENSSL_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) { OPENSSL_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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if (os.length > (int)sizeof(ret->session_id)) /* can't happen */
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os.length = sizeof(ret->session_id);
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ret->session_id_length=os.length;
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OPENSSL_assert(os.length <= (int)sizeof(ret->session_id));
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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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#ifndef OPENSSL_NO_KRB5
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os.length=0;
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M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING);
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if (os.data)
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{
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if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
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ret->krb5_client_princ_len=0;
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else
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ret->krb5_client_princ_len=os.length;
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memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
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OPENSSL_free(os.data);
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os.data = NULL;
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os.length = 0;
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}
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else
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ret->krb5_client_princ_len=0;
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#endif /* OPENSSL_NO_KRB5 */
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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) OPENSSL_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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OPENSSL_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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OPENSSL_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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{
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ret->sid_ctx_length=os.length;
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SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
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}
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else
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{
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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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}
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OPENSSL_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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ai.length=0;
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M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
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if (ai.data != NULL)
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{
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ret->verify_result=ASN1_INTEGER_get(aip);
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OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
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}
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else
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ret->verify_result=X509_V_OK;
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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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