496 lines
17 KiB
C
496 lines
17 KiB
C
/* crypto/evp/e_des3.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 "cryptlib.h"
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#ifndef OPENSSL_NO_DES
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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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# include <openssl/des.h>
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# include <openssl/rand.h>
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/* Block use of implementations in FIPS mode */
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# undef EVP_CIPH_FLAG_FIPS
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# define EVP_CIPH_FLAG_FIPS 0
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typedef struct {
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union {
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double align;
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DES_key_schedule ks[3];
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} ks;
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union {
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void (*cbc) (const void *, void *, size_t,
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const DES_key_schedule *, unsigned char *);
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} stream;
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} DES_EDE_KEY;
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# define ks1 ks.ks[0]
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# define ks2 ks.ks[1]
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# define ks3 ks.ks[2]
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# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
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/* ---------^^^ this is not a typo, just a way to detect that
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* assembler support was in general requested... */
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# include "sparc_arch.h"
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extern unsigned int OPENSSL_sparcv9cap_P[];
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# define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
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void des_t4_key_expand(const void *key, DES_key_schedule *ks);
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void des_t4_ede3_cbc_encrypt(const void *inp, void *out, size_t len,
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const DES_key_schedule ks[3], unsigned char iv[8]);
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void des_t4_ede3_cbc_decrypt(const void *inp, void *out, size_t len,
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const DES_key_schedule ks[3], unsigned char iv[8]);
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# endif
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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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# define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
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/*
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* Because of various casts and different args can't use
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* IMPLEMENT_BLOCK_CIPHER
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*/
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static int 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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BLOCK_CIPHER_ecb_loop()
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DES_ecb3_encrypt((const_DES_cblock *)(in + i),
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(DES_cblock *)(out + i),
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&data(ctx)->ks1, &data(ctx)->ks2,
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&data(ctx)->ks3, ctx->encrypt);
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return 1;
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}
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static int 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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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,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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&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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if (inl)
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DES_ede3_ofb64_encrypt(in, out, (long)inl,
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&data(ctx)->ks1, &data(ctx)->ks2,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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&ctx->num);
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return 1;
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}
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static int 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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DES_EDE_KEY *dat = data(ctx);
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# ifdef KSSL_DEBUG
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{
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int i;
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fprintf(stderr, "des_ede_cbc_cipher(ctx=%p, buflen=%d)\n", ctx,
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ctx->buf_len);
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fprintf(stderr, "\t iv= ");
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for (i = 0; i < 8; i++)
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fprintf(stderr, "%02X", ctx->iv[i]);
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fprintf(stderr, "\n");
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}
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# endif /* KSSL_DEBUG */
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if (dat->stream.cbc) {
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(*dat->stream.cbc) (in, out, inl, dat->ks.ks, ctx->iv);
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return 1;
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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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&dat->ks1, &dat->ks2, &dat->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_cbc_encrypt(in, out, (long)inl,
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&dat->ks1, &dat->ks2, &dat->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 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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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,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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&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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if (inl)
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DES_ede3_cfb64_encrypt(in, out, (long)inl,
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&data(ctx)->ks1, &data(ctx)->ks2,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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&ctx->num, ctx->encrypt);
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return 1;
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}
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/*
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* Although we have a CFB-r implementation for 3-DES, it doesn't pack the
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* right way, so wrap it here
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*/
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static int 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,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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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 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,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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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,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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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 | EVP_CIPH_FLAG_DEFAULT_ASN1,
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des_ede_init_key, NULL, NULL, NULL, 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 | EVP_CIPH_FLAG_FIPS |
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EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL, NULL,
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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 | EVP_CIPH_FLAG_FIPS |
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EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL,
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NULL, 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 | EVP_CIPH_FLAG_FIPS |
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EVP_CIPH_FLAG_DEFAULT_ASN1, des_ede3_init_key, NULL, NULL,
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NULL, des3_ctrl)
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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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{
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DES_cblock *deskey = (DES_cblock *)key;
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DES_EDE_KEY *dat = data(ctx);
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dat->stream.cbc = NULL;
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# if defined(SPARC_DES_CAPABLE)
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if (SPARC_DES_CAPABLE) {
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int mode = ctx->cipher->flags & EVP_CIPH_MODE;
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if (mode == EVP_CIPH_CBC_MODE) {
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des_t4_key_expand(&deskey[0], &dat->ks1);
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des_t4_key_expand(&deskey[1], &dat->ks2);
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memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1));
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dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt :
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des_t4_ede3_cbc_decrypt;
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return 1;
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}
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}
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# endif
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# ifdef EVP_CHECK_DES_KEY
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if (DES_set_key_checked(&deskey[0], &dat->ks1)
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|| DES_set_key_checked(&deskey[1], &dat->ks2))
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return 0;
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# else
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DES_set_key_unchecked(&deskey[0], &dat->ks1);
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DES_set_key_unchecked(&deskey[1], &dat->ks2);
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# endif
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memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1));
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return 1;
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}
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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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{
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DES_cblock *deskey = (DES_cblock *)key;
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DES_EDE_KEY *dat = data(ctx);
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# ifdef KSSL_DEBUG
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{
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int i;
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fprintf(stderr, "des_ede3_init_key(ctx=%p)\n", ctx);
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fprintf(stderr, "\tKEY= ");
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for (i = 0; i < 24; i++)
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fprintf(stderr, "%02X", key[i]);
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fprintf(stderr, "\n");
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if (iv) {
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fprintf(stderr, "\t IV= ");
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for (i = 0; i < 8; i++)
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fprintf(stderr, "%02X", iv[i]);
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fprintf(stderr, "\n");
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}
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}
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# endif /* KSSL_DEBUG */
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dat->stream.cbc = NULL;
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# if defined(SPARC_DES_CAPABLE)
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if (SPARC_DES_CAPABLE) {
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int mode = ctx->cipher->flags & EVP_CIPH_MODE;
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if (mode == EVP_CIPH_CBC_MODE) {
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des_t4_key_expand(&deskey[0], &dat->ks1);
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des_t4_key_expand(&deskey[1], &dat->ks2);
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des_t4_key_expand(&deskey[2], &dat->ks3);
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dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt :
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des_t4_ede3_cbc_decrypt;
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return 1;
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}
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}
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# endif
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# ifdef EVP_CHECK_DES_KEY
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if (DES_set_key_checked(&deskey[0], &dat->ks1)
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|| DES_set_key_checked(&deskey[1], &dat->ks2)
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|| DES_set_key_checked(&deskey[2], &dat->ks3))
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return 0;
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# else
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DES_set_key_unchecked(&deskey[0], &dat->ks1);
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DES_set_key_unchecked(&deskey[1], &dat->ks2);
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DES_set_key_unchecked(&deskey[2], &dat->ks3);
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# endif
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return 1;
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}
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static int 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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switch (type) {
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case EVP_CTRL_RAND_KEY:
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if (RAND_bytes(ptr, c->key_len) <= 0)
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return 0;
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DES_set_odd_parity(deskey);
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if (c->key_len >= 16)
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DES_set_odd_parity(deskey + 1);
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if (c->key_len >= 24)
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DES_set_odd_parity(deskey + 2);
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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 *EVP_des_ede(void)
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{
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return &des_ede_ecb;
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}
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const EVP_CIPHER *EVP_des_ede3(void)
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{
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return &des_ede3_ecb;
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}
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# ifndef OPENSSL_NO_SHA
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# include <openssl/sha.h>
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static const unsigned char wrap_iv[8] =
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{ 0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05 };
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static int des_ede3_unwrap(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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unsigned char icv[8], iv[8], sha1tmp[SHA_DIGEST_LENGTH];
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int rv = -1;
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if (inl < 24)
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return -1;
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if (out == NULL)
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return inl - 16;
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memcpy(ctx->iv, wrap_iv, 8);
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/* Decrypt first block which will end up as icv */
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des_ede_cbc_cipher(ctx, icv, in, 8);
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/* Decrypt central blocks */
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/*
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* If decrypting in place move whole output along a block so the next
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* des_ede_cbc_cipher is in place.
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*/
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if (out == in) {
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memmove(out, out + 8, inl - 8);
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in -= 8;
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}
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des_ede_cbc_cipher(ctx, out, in + 8, inl - 16);
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/* Decrypt final block which will be IV */
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des_ede_cbc_cipher(ctx, iv, in + inl - 8, 8);
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/* Reverse order of everything */
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BUF_reverse(icv, NULL, 8);
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BUF_reverse(out, NULL, inl - 16);
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BUF_reverse(ctx->iv, iv, 8);
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/* Decrypt again using new IV */
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des_ede_cbc_cipher(ctx, out, out, inl - 16);
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des_ede_cbc_cipher(ctx, icv, icv, 8);
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/* Work out SHA1 hash of first portion */
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SHA1(out, inl - 16, sha1tmp);
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if (!CRYPTO_memcmp(sha1tmp, icv, 8))
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rv = inl - 16;
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OPENSSL_cleanse(icv, 8);
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OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
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OPENSSL_cleanse(iv, 8);
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OPENSSL_cleanse(ctx->iv, 8);
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if (rv == -1)
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OPENSSL_cleanse(out, inl - 16);
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return rv;
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}
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static int des_ede3_wrap(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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unsigned char sha1tmp[SHA_DIGEST_LENGTH];
|
|
if (out == NULL)
|
|
return inl + 16;
|
|
/* Copy input to output buffer + 8 so we have space for IV */
|
|
memmove(out + 8, in, inl);
|
|
/* Work out ICV */
|
|
SHA1(in, inl, sha1tmp);
|
|
memcpy(out + inl + 8, sha1tmp, 8);
|
|
OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
|
|
/* Generate random IV */
|
|
if (RAND_bytes(ctx->iv, 8) <= 0)
|
|
return -1;
|
|
memcpy(out, ctx->iv, 8);
|
|
/* Encrypt everything after IV in place */
|
|
des_ede_cbc_cipher(ctx, out + 8, out + 8, inl + 8);
|
|
BUF_reverse(out, NULL, inl + 16);
|
|
memcpy(ctx->iv, wrap_iv, 8);
|
|
des_ede_cbc_cipher(ctx, out, out, inl + 16);
|
|
return inl + 16;
|
|
}
|
|
|
|
static int des_ede3_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
/*
|
|
* Sanity check input length: we typically only wrap keys so EVP_MAXCHUNK
|
|
* is more than will ever be needed. Also input length must be a multiple
|
|
* of 8 bits.
|
|
*/
|
|
if (inl >= EVP_MAXCHUNK || inl % 8)
|
|
return -1;
|
|
if (ctx->encrypt)
|
|
return des_ede3_wrap(ctx, out, in, inl);
|
|
else
|
|
return des_ede3_unwrap(ctx, out, in, inl);
|
|
}
|
|
|
|
static const EVP_CIPHER des3_wrap = {
|
|
NID_id_smime_alg_CMS3DESwrap,
|
|
8, 24, 0,
|
|
EVP_CIPH_WRAP_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
|
|
| EVP_CIPH_FLAG_DEFAULT_ASN1,
|
|
des_ede3_init_key, des_ede3_wrap_cipher,
|
|
NULL,
|
|
sizeof(DES_EDE_KEY),
|
|
NULL, NULL, NULL, NULL
|
|
};
|
|
|
|
const EVP_CIPHER *EVP_des_ede3_wrap(void)
|
|
{
|
|
return &des3_wrap;
|
|
}
|
|
|
|
# endif
|
|
#endif
|