758 lines
16 KiB
C
758 lines
16 KiB
C
/*
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* openssl.c
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* Wrapper for OpenSSL library.
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*
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* Copyright (c) 2001 Marko Kreen
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* 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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* 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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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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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* $PostgreSQL: pgsql/contrib/pgcrypto/openssl.c,v 1.17 2005/03/21 05:21:04 neilc Exp $
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*/
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#include <postgres.h>
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#include "px.h"
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#include <openssl/evp.h>
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/*
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* Is OpenSSL compiled with AES?
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*/
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#undef GOT_AES
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#ifdef AES_ENCRYPT
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#define GOT_AES
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#endif
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/*
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* Hashes
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*/
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static unsigned
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digest_result_size(PX_MD * h)
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{
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return EVP_MD_CTX_size((EVP_MD_CTX *) h->p.ptr);
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}
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static unsigned
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digest_block_size(PX_MD * h)
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{
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return EVP_MD_CTX_block_size((EVP_MD_CTX *) h->p.ptr);
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}
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static void
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digest_reset(PX_MD * h)
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{
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EVP_MD_CTX *ctx = (EVP_MD_CTX *) h->p.ptr;
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const EVP_MD *md;
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md = EVP_MD_CTX_md(ctx);
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EVP_DigestInit(ctx, md);
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}
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static void
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digest_update(PX_MD * h, const uint8 *data, unsigned dlen)
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{
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EVP_MD_CTX *ctx = (EVP_MD_CTX *) h->p.ptr;
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EVP_DigestUpdate(ctx, data, dlen);
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}
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static void
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digest_finish(PX_MD * h, uint8 *dst)
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{
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EVP_MD_CTX *ctx = (EVP_MD_CTX *) h->p.ptr;
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const EVP_MD *md = EVP_MD_CTX_md(ctx);
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EVP_DigestFinal(ctx, dst, NULL);
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/*
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* Some builds of 0.9.7x clear all of ctx in EVP_DigestFinal.
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* Fix it by reinitializing ctx.
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*/
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EVP_DigestInit(ctx, md);
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}
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static void
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digest_free(PX_MD * h)
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{
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EVP_MD_CTX *ctx = (EVP_MD_CTX *) h->p.ptr;
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px_free(ctx);
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px_free(h);
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}
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static int px_openssl_initialized = 0;
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/* PUBLIC functions */
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int
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px_find_digest(const char *name, PX_MD ** res)
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{
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const EVP_MD *md;
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EVP_MD_CTX *ctx;
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PX_MD *h;
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if (!px_openssl_initialized)
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{
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px_openssl_initialized = 1;
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OpenSSL_add_all_algorithms();
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}
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md = EVP_get_digestbyname(name);
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if (md == NULL)
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return PXE_NO_HASH;
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ctx = px_alloc(sizeof(*ctx));
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EVP_DigestInit(ctx, md);
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h = px_alloc(sizeof(*h));
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h->result_size = digest_result_size;
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h->block_size = digest_block_size;
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h->reset = digest_reset;
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h->update = digest_update;
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h->finish = digest_finish;
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h->free = digest_free;
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h->p.ptr = (void *) ctx;
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*res = h;
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return 0;
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}
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/*
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* Ciphers
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*
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* The problem with OpenSSL is that the EVP* family
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* of functions does not allow enough flexibility
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* and forces some of the parameters (keylen,
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* padding) to SSL defaults.
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*
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* So need to manage ciphers ourselves.
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*/
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struct ossl_cipher
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{
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int (*init) (PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv);
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int (*encrypt) (PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res);
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int (*decrypt) (PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res);
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int block_size;
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int max_key_size;
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int stream_cipher;
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};
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typedef struct
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{
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union
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{
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struct
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{
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BF_KEY key;
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int num;
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} bf;
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struct
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{
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des_key_schedule key_schedule;
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} des;
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struct
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{
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des_key_schedule k1, k2, k3;
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} des3;
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CAST_KEY cast_key;
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#ifdef GOT_AES
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AES_KEY aes_key;
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#endif
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} u;
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uint8 key[EVP_MAX_KEY_LENGTH];
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uint8 iv[EVP_MAX_IV_LENGTH];
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unsigned klen;
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unsigned init;
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const struct ossl_cipher *ciph;
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} ossldata;
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/* generic */
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static unsigned
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gen_ossl_block_size(PX_Cipher * c)
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{
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ossldata *od = (ossldata *) c->ptr;
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return od->ciph->block_size;
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}
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static unsigned
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gen_ossl_key_size(PX_Cipher * c)
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{
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ossldata *od = (ossldata *) c->ptr;
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return od->ciph->max_key_size;
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}
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static unsigned
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gen_ossl_iv_size(PX_Cipher * c)
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{
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unsigned ivlen;
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ossldata *od = (ossldata *) c->ptr;
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ivlen = od->ciph->block_size;
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return ivlen;
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}
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static void
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gen_ossl_free(PX_Cipher * c)
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{
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ossldata *od = (ossldata *) c->ptr;
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memset(od, 0, sizeof(*od));
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px_free(od);
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px_free(c);
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}
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/* Blowfish */
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static int
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bf_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
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{
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ossldata *od = c->ptr;
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BF_set_key(&od->u.bf.key, klen, key);
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if (iv)
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memcpy(od->iv, iv, BF_BLOCK);
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else
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memset(od->iv, 0, BF_BLOCK);
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od->u.bf.num = 0;
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return 0;
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}
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static int
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bf_ecb_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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unsigned bs = gen_ossl_block_size(c);
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unsigned i;
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ossldata *od = c->ptr;
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for (i = 0; i < dlen / bs; i++)
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BF_ecb_encrypt(data + i * bs, res + i * bs, &od->u.bf.key, BF_ENCRYPT);
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return 0;
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}
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static int
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bf_ecb_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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unsigned bs = gen_ossl_block_size(c),
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i;
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ossldata *od = c->ptr;
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for (i = 0; i < dlen / bs; i++)
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BF_ecb_encrypt(data + i * bs, res + i * bs, &od->u.bf.key, BF_DECRYPT);
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return 0;
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}
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static int
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bf_cbc_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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ossldata *od = c->ptr;
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BF_cbc_encrypt(data, res, dlen, &od->u.bf.key, od->iv, BF_ENCRYPT);
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return 0;
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}
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static int
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bf_cbc_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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ossldata *od = c->ptr;
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BF_cbc_encrypt(data, res, dlen, &od->u.bf.key, od->iv, BF_DECRYPT);
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return 0;
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}
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static int
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bf_cfb64_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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ossldata *od = c->ptr;
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BF_cfb64_encrypt(data, res, dlen, &od->u.bf.key, od->iv,
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&od->u.bf.num, BF_ENCRYPT);
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return 0;
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}
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static int
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bf_cfb64_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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ossldata *od = c->ptr;
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BF_cfb64_encrypt(data, res, dlen, &od->u.bf.key, od->iv,
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&od->u.bf.num, BF_DECRYPT);
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return 0;
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}
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/* DES */
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static int
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ossl_des_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
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{
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ossldata *od = c->ptr;
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des_cblock xkey;
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memset(&xkey, 0, sizeof(xkey));
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memcpy(&xkey, key, klen > 8 ? 8 : klen);
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des_set_key(&xkey, od->u.des.key_schedule);
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memset(&xkey, 0, sizeof(xkey));
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if (iv)
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memcpy(od->iv, iv, 8);
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else
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memset(od->iv, 0, 8);
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return 0;
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}
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static int
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ossl_des_ecb_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
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uint8 *res)
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{
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unsigned bs = gen_ossl_block_size(c);
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unsigned i;
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ossldata *od = c->ptr;
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for (i = 0; i < dlen / bs; i++)
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des_ecb_encrypt((des_cblock *) (data + i * bs),
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(des_cblock *) (res + i * bs),
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od->u.des.key_schedule, 1);
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return 0;
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}
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static int
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ossl_des_ecb_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
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uint8 *res)
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{
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unsigned bs = gen_ossl_block_size(c);
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unsigned i;
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ossldata *od = c->ptr;
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for (i = 0; i < dlen / bs; i++)
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des_ecb_encrypt((des_cblock *) (data + i * bs),
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(des_cblock *) (res + i * bs),
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od->u.des.key_schedule, 0);
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return 0;
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}
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static int
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ossl_des_cbc_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
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uint8 *res)
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{
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ossldata *od = c->ptr;
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des_ncbc_encrypt(data, res, dlen, od->u.des.key_schedule,
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(des_cblock *) od->iv, 1);
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return 0;
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}
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static int
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ossl_des_cbc_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
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uint8 *res)
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{
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ossldata *od = c->ptr;
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des_ncbc_encrypt(data, res, dlen, od->u.des.key_schedule,
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(des_cblock *) od->iv, 0);
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return 0;
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}
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/* DES3 */
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static int
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ossl_des3_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
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{
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ossldata *od = c->ptr;
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des_cblock xkey1,
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xkey2,
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xkey3;
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memset(&xkey1, 0, sizeof(xkey1));
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memset(&xkey2, 0, sizeof(xkey2));
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memset(&xkey2, 0, sizeof(xkey2));
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memcpy(&xkey1, key, klen > 8 ? 8 : klen);
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if (klen > 8)
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memcpy(&xkey2, key + 8, (klen - 8) > 8 ? 8 : (klen - 8));
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if (klen > 16)
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memcpy(&xkey3, key + 16, (klen - 16) > 8 ? 8 : (klen - 16));
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DES_set_key(&xkey1, &od->u.des3.k1);
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DES_set_key(&xkey2, &od->u.des3.k2);
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DES_set_key(&xkey3, &od->u.des3.k3);
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memset(&xkey1, 0, sizeof(xkey1));
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memset(&xkey2, 0, sizeof(xkey2));
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memset(&xkey3, 0, sizeof(xkey3));
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if (iv)
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memcpy(od->iv, iv, 8);
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else
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memset(od->iv, 0, 8);
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return 0;
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}
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static int
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ossl_des3_ecb_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
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uint8 *res)
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{
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unsigned bs = gen_ossl_block_size(c);
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unsigned i;
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ossldata *od = c->ptr;
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for (i = 0; i < dlen / bs; i++)
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DES_ecb3_encrypt(data + i * bs, res + i * bs,
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&od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3, 1);
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return 0;
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}
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static int
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ossl_des3_ecb_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
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uint8 *res)
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{
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unsigned bs = gen_ossl_block_size(c);
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unsigned i;
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ossldata *od = c->ptr;
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for (i = 0; i < dlen / bs; i++)
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DES_ecb3_encrypt(data + i * bs, res + i * bs,
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&od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3, 0);
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return 0;
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}
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static int
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ossl_des3_cbc_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
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uint8 *res)
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{
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ossldata *od = c->ptr;
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DES_ede3_cbc_encrypt(data, res, dlen,
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&od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3,
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(des_cblock *) od->iv, 1);
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return 0;
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}
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static int
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ossl_des3_cbc_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
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uint8 *res)
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{
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ossldata *od = c->ptr;
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DES_ede3_cbc_encrypt(data, res, dlen,
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&od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3,
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(des_cblock *) od->iv, 0);
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return 0;
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}
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/* CAST5 */
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static int
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ossl_cast_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
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{
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ossldata *od = c->ptr;
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unsigned bs = gen_ossl_block_size(c);
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CAST_set_key(&od->u.cast_key, klen, key);
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if (iv)
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memcpy(od->iv, iv, bs);
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else
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memset(od->iv, 0, bs);
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return 0;
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}
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static int
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ossl_cast_ecb_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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unsigned bs = gen_ossl_block_size(c);
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ossldata *od = c->ptr;
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const uint8 *end = data + dlen - bs;
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for (; data <= end; data += bs, res += bs)
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CAST_ecb_encrypt(data, res, &od->u.cast_key, CAST_ENCRYPT);
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return 0;
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}
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static int
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ossl_cast_ecb_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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unsigned bs = gen_ossl_block_size(c);
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ossldata *od = c->ptr;
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const uint8 *end = data + dlen - bs;
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for (; data <= end; data += bs, res += bs)
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CAST_ecb_encrypt(data, res, &od->u.cast_key, CAST_DECRYPT);
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return 0;
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}
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static int
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ossl_cast_cbc_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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ossldata *od = c->ptr;
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CAST_cbc_encrypt(data, res, dlen, &od->u.cast_key, od->iv, CAST_ENCRYPT);
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return 0;
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}
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static int
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ossl_cast_cbc_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
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{
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ossldata *od = c->ptr;
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CAST_cbc_encrypt(data, res, dlen, &od->u.cast_key, od->iv, CAST_DECRYPT);
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return 0;
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}
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/* AES */
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#ifdef GOT_AES
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static int
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|
ossl_aes_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
|
|
{
|
|
ossldata *od = c->ptr;
|
|
unsigned bs = gen_ossl_block_size(c);
|
|
|
|
if (klen <= 128/8)
|
|
od->klen = 128/8;
|
|
else if (klen <= 192/8)
|
|
od->klen = 192/8;
|
|
else if (klen <= 256/8)
|
|
od->klen = 256/8;
|
|
else
|
|
return PXE_KEY_TOO_BIG;
|
|
|
|
memcpy(od->key, key, klen);
|
|
|
|
if (iv)
|
|
memcpy(od->iv, iv, bs);
|
|
else
|
|
memset(od->iv, 0, bs);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
ossl_aes_key_init(ossldata * od, int type)
|
|
{
|
|
if (type == AES_ENCRYPT)
|
|
AES_set_encrypt_key(od->key, od->klen * 8, &od->u.aes_key);
|
|
else
|
|
AES_set_decrypt_key(od->key, od->klen * 8, &od->u.aes_key);
|
|
od->init = 1;
|
|
}
|
|
|
|
static int
|
|
ossl_aes_ecb_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
|
|
uint8 *res)
|
|
{
|
|
unsigned bs = gen_ossl_block_size(c);
|
|
ossldata *od = c->ptr;
|
|
const uint8 *end = data + dlen - bs;
|
|
|
|
if (!od->init)
|
|
ossl_aes_key_init(od, AES_ENCRYPT);
|
|
|
|
for (; data <= end; data += bs, res += bs)
|
|
AES_ecb_encrypt(data, res, &od->u.aes_key, AES_ENCRYPT);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ossl_aes_ecb_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
|
|
uint8 *res)
|
|
{
|
|
unsigned bs = gen_ossl_block_size(c);
|
|
ossldata *od = c->ptr;
|
|
const uint8 *end = data + dlen - bs;
|
|
|
|
if (!od->init)
|
|
ossl_aes_key_init(od, AES_DECRYPT);
|
|
|
|
for (; data <= end; data += bs, res += bs)
|
|
AES_ecb_encrypt(data, res, &od->u.aes_key, AES_DECRYPT);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ossl_aes_cbc_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
|
|
uint8 *res)
|
|
{
|
|
ossldata *od = c->ptr;
|
|
|
|
if (!od->init)
|
|
ossl_aes_key_init(od, AES_ENCRYPT);
|
|
|
|
AES_cbc_encrypt(data, res, dlen, &od->u.aes_key, od->iv, AES_ENCRYPT);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ossl_aes_cbc_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
|
|
uint8 *res)
|
|
{
|
|
ossldata *od = c->ptr;
|
|
|
|
if (!od->init)
|
|
ossl_aes_key_init(od, AES_DECRYPT);
|
|
|
|
AES_cbc_encrypt(data, res, dlen, &od->u.aes_key, od->iv, AES_DECRYPT);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* aliases
|
|
*/
|
|
|
|
static PX_Alias ossl_aliases[] = {
|
|
{"bf", "bf-cbc"},
|
|
{"blowfish", "bf-cbc"},
|
|
{"blowfish-cbc", "bf-cbc"},
|
|
{"blowfish-ecb", "bf-ecb"},
|
|
{"blowfish-cfb", "bf-cfb"},
|
|
{"des", "des-cbc"},
|
|
{"3des", "des3-cbc"},
|
|
{"3des-ecb", "des3-ecb"},
|
|
{"3des-cbc", "des3-cbc"},
|
|
{"cast5", "cast5-cbc"},
|
|
{"aes", "aes-cbc"},
|
|
{"rijndael", "aes-cbc"},
|
|
{"rijndael-cbc", "aes-cbc"},
|
|
{"rijndael-ecb", "aes-ecb"},
|
|
{NULL}
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_bf_cbc = {
|
|
bf_init, bf_cbc_encrypt, bf_cbc_decrypt,
|
|
64 / 8, 448 / 8, 0
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_bf_ecb = {
|
|
bf_init, bf_ecb_encrypt, bf_ecb_decrypt,
|
|
64 / 8, 448 / 8, 0
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_bf_cfb = {
|
|
bf_init, bf_cfb64_encrypt, bf_cfb64_decrypt,
|
|
64 / 8, 448 / 8, 1
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_des_ecb = {
|
|
ossl_des_init, ossl_des_ecb_encrypt, ossl_des_ecb_decrypt,
|
|
64 / 8, 64 / 8, 0
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_des_cbc = {
|
|
ossl_des_init, ossl_des_cbc_encrypt, ossl_des_cbc_decrypt,
|
|
64 / 8, 64 / 8, 0
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_des3_ecb = {
|
|
ossl_des3_init, ossl_des3_ecb_encrypt, ossl_des3_ecb_decrypt,
|
|
64 / 8, 192 / 8, 0
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_des3_cbc = {
|
|
ossl_des3_init, ossl_des3_cbc_encrypt, ossl_des3_cbc_decrypt,
|
|
64 / 8, 192 / 8, 0
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_cast_ecb = {
|
|
ossl_cast_init, ossl_cast_ecb_encrypt, ossl_cast_ecb_decrypt,
|
|
64 / 8, 128 / 8, 0
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_cast_cbc = {
|
|
ossl_cast_init, ossl_cast_cbc_encrypt, ossl_cast_cbc_decrypt,
|
|
64 / 8, 128 / 8, 0
|
|
};
|
|
|
|
#ifdef GOT_AES
|
|
static const struct ossl_cipher ossl_aes_ecb = {
|
|
ossl_aes_init, ossl_aes_ecb_encrypt, ossl_aes_ecb_decrypt,
|
|
128 / 8, 256 / 8, 0
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_aes_cbc = {
|
|
ossl_aes_init, ossl_aes_cbc_encrypt, ossl_aes_cbc_decrypt,
|
|
128 / 8, 256 / 8, 0
|
|
};
|
|
#endif
|
|
|
|
/*
|
|
* Special handlers
|
|
*/
|
|
struct ossl_cipher_lookup
|
|
{
|
|
const char *name;
|
|
const struct ossl_cipher *ciph;
|
|
};
|
|
|
|
static const struct ossl_cipher_lookup ossl_cipher_types[] = {
|
|
{"bf-cbc", &ossl_bf_cbc},
|
|
{"bf-ecb", &ossl_bf_ecb},
|
|
{"bf-cfb", &ossl_bf_cfb},
|
|
{"des-ecb", &ossl_des_ecb},
|
|
{"des-cbc", &ossl_des_cbc},
|
|
{"des3-ecb", &ossl_des3_ecb},
|
|
{"des3-cbc", &ossl_des3_cbc},
|
|
{"cast5-ecb", &ossl_cast_ecb},
|
|
{"cast5-cbc", &ossl_cast_cbc},
|
|
#ifdef GOT_AES
|
|
{"aes-ecb", &ossl_aes_ecb},
|
|
{"aes-cbc", &ossl_aes_cbc},
|
|
#endif
|
|
{NULL}
|
|
};
|
|
|
|
/* PUBLIC functions */
|
|
|
|
int
|
|
px_find_cipher(const char *name, PX_Cipher ** res)
|
|
{
|
|
const struct ossl_cipher_lookup *i;
|
|
PX_Cipher *c = NULL;
|
|
ossldata *od;
|
|
|
|
name = px_resolve_alias(ossl_aliases, name);
|
|
for (i = ossl_cipher_types; i->name; i++)
|
|
if (!strcmp(i->name, name))
|
|
break;
|
|
if (i->name == NULL)
|
|
return PXE_NO_CIPHER;
|
|
|
|
od = px_alloc(sizeof(*od));
|
|
memset(od, 0, sizeof(*od));
|
|
od->ciph = i->ciph;
|
|
|
|
c = px_alloc(sizeof(*c));
|
|
c->block_size = gen_ossl_block_size;
|
|
c->key_size = gen_ossl_key_size;
|
|
c->iv_size = gen_ossl_iv_size;
|
|
c->free = gen_ossl_free;
|
|
c->init = od->ciph->init;
|
|
c->encrypt = od->ciph->encrypt;
|
|
c->decrypt = od->ciph->decrypt;
|
|
c->ptr = od;
|
|
|
|
*res = c;
|
|
return 0;
|
|
}
|