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/* $OpenBSD: e_des3.c,v 1.19 2015/10/12 06:05:52 guenther Exp $ */ |
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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 <string.h> |
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#include <openssl/opensslconf.h> |
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#ifndef OPENSSL_NO_DES |
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#include <openssl/des.h> |
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#include <openssl/evp.h> |
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#include <openssl/objects.h> |
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#include "evp_locl.h" |
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static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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const unsigned char *iv, int enc); |
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static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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const unsigned char *iv, int enc); |
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static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); |
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typedef struct { |
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DES_key_schedule ks1;/* key schedule */ |
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DES_key_schedule ks2;/* key schedule (for ede) */ |
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DES_key_schedule ks3;/* key schedule (for ede3) */ |
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} DES_EDE_KEY; |
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#define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data) |
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/* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */ |
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static int |
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des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t inl) |
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{ |
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✗✓✓✓
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BLOCK_CIPHER_ecb_loop() |
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DES_ecb3_encrypt((const_DES_cblock *)(in + i), (DES_cblock *)(out + i), |
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&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, ctx->encrypt); |
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return 1; |
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} |
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static int |
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des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t inl) |
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{ |
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✗✓ |
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while (inl >= EVP_MAXCHUNK) { |
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DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, |
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&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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(DES_cblock *)ctx->iv, &ctx->num); |
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inl -= EVP_MAXCHUNK; |
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in += EVP_MAXCHUNK; |
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out += EVP_MAXCHUNK; |
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} |
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✓✗ |
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if (inl) |
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DES_ede3_ofb64_encrypt(in, out, (long)inl, |
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&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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(DES_cblock *)ctx->iv, &ctx->num); |
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return 1; |
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} |
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static int |
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des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t inl) |
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{ |
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✗✓ |
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while (inl >= EVP_MAXCHUNK) { |
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DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, |
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&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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(DES_cblock *)ctx->iv, ctx->encrypt); |
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inl -= EVP_MAXCHUNK; |
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in += EVP_MAXCHUNK; |
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out += EVP_MAXCHUNK; |
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} |
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✓✗ |
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if (inl) |
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DES_ede3_cbc_encrypt(in, out, (long)inl, |
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&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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(DES_cblock *)ctx->iv, ctx->encrypt); |
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return 1; |
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} |
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static int |
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des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t inl) |
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{ |
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✗✓ |
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while (inl >= EVP_MAXCHUNK) { |
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DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, |
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&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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(DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); |
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inl -= EVP_MAXCHUNK; |
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in += EVP_MAXCHUNK; |
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out += EVP_MAXCHUNK; |
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} |
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✓✗ |
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if (inl) |
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DES_ede3_cfb64_encrypt(in, out, (long)inl, |
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&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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(DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); |
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return 1; |
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} |
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/* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right |
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way, so wrap it here */ |
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static int |
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des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t inl) |
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{ |
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size_t n; |
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unsigned char c[1], d[1]; |
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for (n = 0; n < inl; ++n) { |
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c[0] = (in[n/8]&(1 << (7 - n % 8))) ? 0x80 : 0; |
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DES_ede3_cfb_encrypt(c, d, 1, 1, |
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&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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(DES_cblock *)ctx->iv, ctx->encrypt); |
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out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) | |
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((d[0] & 0x80) >> (unsigned int)(n % 8)); |
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} |
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return 1; |
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} |
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static int |
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des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
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const unsigned char *in, size_t inl) |
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{ |
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while (inl >= EVP_MAXCHUNK) { |
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DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, |
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&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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(DES_cblock *)ctx->iv, ctx->encrypt); |
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inl -= EVP_MAXCHUNK; |
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in += EVP_MAXCHUNK; |
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out += EVP_MAXCHUNK; |
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} |
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if (inl) |
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DES_ede3_cfb_encrypt(in, out, 8, (long)inl, |
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&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, |
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(DES_cblock *)ctx->iv, ctx->encrypt); |
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return 1; |
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} |
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BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64, |
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EVP_CIPH_RAND_KEY, des_ede_init_key, NULL, |
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EVP_CIPHER_set_asn1_iv, |
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EVP_CIPHER_get_asn1_iv, |
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des3_ctrl) |
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#define des_ede3_cfb64_cipher des_ede_cfb64_cipher |
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#define des_ede3_ofb_cipher des_ede_ofb_cipher |
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#define des_ede3_cbc_cipher des_ede_cbc_cipher |
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#define des_ede3_ecb_cipher des_ede_ecb_cipher |
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BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64, |
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EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, |
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EVP_CIPHER_set_asn1_iv, |
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EVP_CIPHER_get_asn1_iv, |
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des3_ctrl) |
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BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1, |
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EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, |
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EVP_CIPHER_set_asn1_iv, |
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EVP_CIPHER_get_asn1_iv, |
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des3_ctrl) |
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BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8, |
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EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL, |
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EVP_CIPHER_set_asn1_iv, |
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EVP_CIPHER_get_asn1_iv, |
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des3_ctrl) |
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static int |
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des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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const unsigned char *iv, int enc) |
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{ |
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DES_cblock *deskey = (DES_cblock *)key; |
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DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1); |
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DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2); |
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memcpy(&data(ctx)->ks3, &data(ctx)->ks1, |
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sizeof(data(ctx)->ks1)); |
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return 1; |
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} |
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static int |
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des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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const unsigned char *iv, int enc) |
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{ |
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DES_cblock *deskey = (DES_cblock *)key; |
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DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1); |
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DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2); |
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DES_set_key_unchecked(&deskey[2], &data(ctx)->ks3); |
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return 1; |
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} |
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static int |
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des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) |
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{ |
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DES_cblock *deskey = ptr; |
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✗✓ |
2 |
switch (type) { |
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case EVP_CTRL_RAND_KEY: |
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if (DES_random_key(deskey) == 0) |
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return 0; |
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if (c->key_len >= 16 && DES_random_key(deskey + 1) == 0) |
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return 0; |
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if (c->key_len >= 24 && DES_random_key(deskey + 2) == 0) |
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return 0; |
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return 1; |
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default: |
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return -1; |
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} |
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} |
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const EVP_CIPHER * |
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EVP_des_ede(void) |
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{ |
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2856 |
return &des_ede_ecb; |
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} |
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const EVP_CIPHER * |
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EVP_des_ede3(void) |
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{ |
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2856 |
return &des_ede3_ecb; |
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} |
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#endif |