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198 lines
6.4 KiB
198 lines
6.4 KiB
/* p12_decr.c */ |
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/* |
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project |
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* 1999. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 1999 The OpenSSL Project. All rights reserved. |
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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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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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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 |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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#include <stdio.h> |
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#include "cryptlib.h" |
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#include <openssl/pkcs12.h> |
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/* Define this to dump decrypted output to files called DERnnn */ |
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/* |
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* #define DEBUG_DECRYPT |
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*/ |
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/* |
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* Encrypt/Decrypt a buffer based on password and algor, result in a |
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* OPENSSL_malloc'ed buffer |
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*/ |
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unsigned char *PKCS12_pbe_crypt(X509_ALGOR *algor, const char *pass, |
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int passlen, unsigned char *in, int inlen, |
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unsigned char **data, int *datalen, int en_de) |
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{ |
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unsigned char *out; |
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int outlen, i; |
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EVP_CIPHER_CTX ctx; |
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EVP_CIPHER_CTX_init(&ctx); |
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/* Decrypt data */ |
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if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen, |
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algor->parameter, &ctx, en_de)) { |
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PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT, |
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PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR); |
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return NULL; |
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} |
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if (!(out = OPENSSL_malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) { |
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PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT, ERR_R_MALLOC_FAILURE); |
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goto err; |
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} |
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if (!EVP_CipherUpdate(&ctx, out, &i, in, inlen)) { |
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OPENSSL_free(out); |
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out = NULL; |
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PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT, ERR_R_EVP_LIB); |
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goto err; |
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} |
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outlen = i; |
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if (!EVP_CipherFinal_ex(&ctx, out + i, &i)) { |
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OPENSSL_free(out); |
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out = NULL; |
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PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT, |
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PKCS12_R_PKCS12_CIPHERFINAL_ERROR); |
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goto err; |
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} |
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outlen += i; |
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if (datalen) |
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*datalen = outlen; |
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if (data) |
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*data = out; |
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err: |
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EVP_CIPHER_CTX_cleanup(&ctx); |
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return out; |
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} |
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/* |
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* Decrypt an OCTET STRING and decode ASN1 structure if zbuf set zero buffer |
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* after use. |
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*/ |
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void *PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it, |
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const char *pass, int passlen, |
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ASN1_OCTET_STRING *oct, int zbuf) |
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{ |
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unsigned char *out; |
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const unsigned char *p; |
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void *ret; |
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int outlen; |
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if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length, |
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&out, &outlen, 0)) { |
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PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I, |
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PKCS12_R_PKCS12_PBE_CRYPT_ERROR); |
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return NULL; |
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} |
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p = out; |
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#ifdef DEBUG_DECRYPT |
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{ |
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FILE *op; |
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char fname[30]; |
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static int fnm = 1; |
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sprintf(fname, "DER%d", fnm++); |
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op = fopen(fname, "wb"); |
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fwrite(p, 1, outlen, op); |
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fclose(op); |
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} |
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#endif |
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ret = ASN1_item_d2i(NULL, &p, outlen, it); |
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if (zbuf) |
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OPENSSL_cleanse(out, outlen); |
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if (!ret) |
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PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I, PKCS12_R_DECODE_ERROR); |
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OPENSSL_free(out); |
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return ret; |
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} |
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/* |
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* Encode ASN1 structure and encrypt, return OCTET STRING if zbuf set zero |
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* encoding. |
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*/ |
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ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor, |
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const ASN1_ITEM *it, |
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const char *pass, int passlen, |
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void *obj, int zbuf) |
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{ |
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ASN1_OCTET_STRING *oct; |
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unsigned char *in = NULL; |
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int inlen; |
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if (!(oct = M_ASN1_OCTET_STRING_new())) { |
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PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT, ERR_R_MALLOC_FAILURE); |
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return NULL; |
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} |
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inlen = ASN1_item_i2d(obj, &in, it); |
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if (!in) { |
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PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT, PKCS12_R_ENCODE_ERROR); |
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return NULL; |
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} |
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if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data, |
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&oct->length, 1)) { |
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PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT, PKCS12_R_ENCRYPT_ERROR); |
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OPENSSL_free(in); |
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return NULL; |
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} |
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if (zbuf) |
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OPENSSL_cleanse(in, inlen); |
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OPENSSL_free(in); |
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return oct; |
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} |
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IMPLEMENT_PKCS12_STACK_OF(PKCS7)
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