crypto/pkcs12/p12_decr.c

   1 /* p12_decr.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 1999.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/pkcs12.h>
  62
  63 /* Define this to dump decrypted output to files called DERnnn */
  64 /*#define DEBUG_DECRYPT*/
  65
  66
  67 /* Encrypt/Decrypt a buffer based on password and algor, result in a
  68  * Malloc'ed buffer
  69  */
  70
  71 unsigned char * PKCS12_pbe_crypt (X509_ALGOR *algor, const char *pass,
  72              int passlen, unsigned char *in, int inlen, unsigned char **data,
  73              int *datalen, int en_de)
  74 {
  75         unsigned char *out;
  76         int outlen, i;
  77         EVP_CIPHER_CTX ctx;
  78
  79         /* Decrypt data */
  80         if (!EVP_PBE_CipherInit (algor->algorithm, pass, passlen,
  81                                          algor->parameter, &ctx, en_de)) {
  82                 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR);
  83                 return NULL;
  84         }
  85
  86         if(!(out = Malloc (inlen + EVP_CIPHER_CTX_block_size(&ctx)))) {
  87                 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_MALLOC_FAILURE);
  88                 return NULL;
  89         }
  90
  91         EVP_CipherUpdate (&ctx, out, &i, in, inlen);
  92         outlen = i;
  93         if(!EVP_CipherFinal (&ctx, out + i, &i)) {
  94                 Free (out);
  95                 PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_CIPHERFINAL_ERROR);
  96                 return NULL;
  97         }
  98         outlen += i;
  99         if (datalen) *datalen = outlen;
 100         if (data) *data = out;
 101         return out;
 102
 103 }
 104
 105 /* Decrypt an OCTET STRING and decode ASN1 structure
 106  * if seq & 1 'obj' is a stack of structures to be encoded
 107  * if seq & 2 zero buffer after use
 108  * as a sequence.
 109  */
 110
 111 char * PKCS12_decrypt_d2i (X509_ALGOR *algor, char * (*d2i)(),
 112              void (*free_func)(), const char *pass, int passlen,
 113              ASN1_OCTET_STRING *oct, int seq)
 114 {
 115         unsigned char *out, *p;
 116         char *ret;
 117         int outlen;
 118
 119         if (!PKCS12_pbe_crypt (algor, pass, passlen, oct->data, oct->length,
 120                                &out, &outlen, 0)) {
 121                 PKCS12err(PKCS12_F_PKCS12_DECRYPT_D2I,PKCS12_R_PKCS12_PBE_CRYPT_ERROR);
 122                 return NULL;
 123         }
 124         p = out;
 125 #ifdef DEBUG_DECRYPT
 126         {
 127                 FILE *op;
 128
 129                 char fname[30];
 130                 static int fnm = 1;
 131                 sprintf(fname, "DER%d", fnm++);
 132                 op = fopen(fname, "wb");
 133                 fwrite (p, 1, outlen, op);
 134                 fclose(op);
 135         }
 136 #endif
 137         if (seq & 1) ret = (char *) d2i_ASN1_SET(NULL, &p, outlen, d2i,
 138                                 free_func, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);
 139         else ret = d2i(NULL, &p, outlen);
 140         if (seq & 2) memset(out, 0, outlen);
 141         if(!ret) PKCS12err(PKCS12_F_PKCS12_DECRYPT_D2I,PKCS12_R_DECODE_ERROR);
 142         Free (out);
 143         return ret;
 144 }
 145
 146 /* Encode ASN1 structure and encrypt, return OCTET STRING
 147  * if 'seq' is non-zero 'obj' is a stack of structures to be encoded
 148  * as a sequence
 149  */
 150
 151 ASN1_OCTET_STRING *PKCS12_i2d_encrypt (X509_ALGOR *algor, int (*i2d)(),
 152                                        const char *pass, int passlen,
 153                                        char *obj, int seq)
 154 {
 155         ASN1_OCTET_STRING *oct;
 156         unsigned char *in, *p;
 157         int inlen;
 158         if (!(oct = M_ASN1_OCTET_STRING_new ())) {
 159                 PKCS12err(PKCS12_F_PKCS12_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE);
 160                 return NULL;
 161         }
 162         if (seq) inlen = i2d_ASN1_SET((STACK *)obj, NULL, i2d, V_ASN1_SEQUENCE,
 163                                                  V_ASN1_UNIVERSAL, IS_SEQUENCE);
 164         else inlen = i2d (obj, NULL);
 165         if (!inlen) {
 166                 PKCS12err(PKCS12_F_PKCS12_I2D_ENCRYPT,PKCS12_R_ENCODE_ERROR);
 167                 return NULL;
 168         }
 169         if (!(in = Malloc (inlen))) {
 170                 PKCS12err(PKCS12_F_PKCS12_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE);
 171                 return NULL;
 172         }
 173         p = in;
 174         if (seq) i2d_ASN1_SET((STACK *)obj, &p, i2d, V_ASN1_SEQUENCE,
 175                                                  V_ASN1_UNIVERSAL, IS_SEQUENCE);
 176         else i2d (obj, &p);
 177         if (!PKCS12_pbe_crypt (algor, pass, passlen, in, inlen, &oct->data,
 178                                  &oct->length, 1)) {
 179                 PKCS12err(PKCS12_F_PKCS12_I2D_ENCRYPT,PKCS12_R_ENCRYPT_ERROR);
 180                 Free(in);
 181                 return NULL;
 182         }
 183         Free (in);
 184         return oct;
 185 }
 186
 187 IMPLEMENT_PKCS12_STACK_OF(PKCS7)