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OpenSSL officially only supports 1.0.1 and newer. Some OS distributions still provide patches for 0.9.8, but anything older than that is not interesting anymore. Let's simplify things by removing compatibility code. Andreas Karlsson, with small changes by me.
885 lines
19 KiB
C
885 lines
19 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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* contrib/pgcrypto/openssl.c
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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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#include <openssl/blowfish.h>
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#include <openssl/cast.h>
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#include <openssl/des.h>
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#include <openssl/aes.h>
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#include <openssl/rand.h>
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#include <openssl/err.h>
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/*
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* Max lengths we might want to handle.
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*/
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#define MAX_KEY (512/8)
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#define MAX_IV (128/8)
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/*
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* Hashes
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*/
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typedef struct OSSLDigest
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{
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const EVP_MD *algo;
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EVP_MD_CTX ctx;
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} OSSLDigest;
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static unsigned
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digest_result_size(PX_MD *h)
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{
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OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
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return EVP_MD_CTX_size(&digest->ctx);
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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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OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
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return EVP_MD_CTX_block_size(&digest->ctx);
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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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OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
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EVP_DigestInit_ex(&digest->ctx, digest->algo, NULL);
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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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OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
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EVP_DigestUpdate(&digest->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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OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
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EVP_DigestFinal_ex(&digest->ctx, dst, NULL);
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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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OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
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EVP_MD_CTX_cleanup(&digest->ctx);
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px_free(digest);
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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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PX_MD *h;
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OSSLDigest *digest;
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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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digest = px_alloc(sizeof(*digest));
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digest->algo = md;
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EVP_MD_CTX_init(&digest->ctx);
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if (EVP_DigestInit_ex(&digest->ctx, digest->algo, NULL) == 0)
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return -1;
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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 *) digest;
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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,
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k2,
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k3;
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} des3;
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CAST_KEY cast_key;
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AES_KEY aes_key;
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} u;
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uint8 key[MAX_KEY];
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uint8 iv[MAX_IV];
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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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px_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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/*
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* Check if strong crypto is supported. Some openssl installations
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* support only short keys and unfortunately BF_set_key does not return any
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* error value. This function tests if is possible to use strong key.
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*/
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static int
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bf_check_supported_key_len(void)
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{
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static const uint8 key[56] = {
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0xf0, 0xe1, 0xd2, 0xc3, 0xb4, 0xa5, 0x96, 0x87, 0x78, 0x69,
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0x5a, 0x4b, 0x3c, 0x2d, 0x1e, 0x0f, 0x00, 0x11, 0x22, 0x33,
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0x44, 0x55, 0x66, 0x77, 0x04, 0x68, 0x91, 0x04, 0xc2, 0xfd,
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0x3b, 0x2f, 0x58, 0x40, 0x23, 0x64, 0x1a, 0xba, 0x61, 0x76,
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0x1f, 0x1f, 0x1f, 0x1f, 0x0e, 0x0e, 0x0e, 0x0e, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff
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};
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static const uint8 data[8] = {0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10};
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static const uint8 res[8] = {0xc0, 0x45, 0x04, 0x01, 0x2e, 0x4e, 0x1f, 0x53};
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static uint8 out[8];
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BF_KEY bf_key;
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/* encrypt with 448bits key and verify output */
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BF_set_key(&bf_key, 56, key);
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BF_ecb_encrypt(data, out, &bf_key, BF_ENCRYPT);
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if (memcmp(out, res, 8) != 0)
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return 0; /* Output does not match -> strong cipher is
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* not supported */
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return 1;
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}
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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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static int bf_is_strong = -1;
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/*
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* Test if key len is supported. BF_set_key silently cut large keys and it
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* could be a problem when user transfer crypted data from one server to
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* another.
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*/
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if (bf_is_strong == -1)
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bf_is_strong = bf_check_supported_key_len();
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if (!bf_is_strong && klen > 16)
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return PXE_KEY_TOO_BIG;
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/* Key len is supported. We can use it. */
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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(&xkey3, 0, sizeof(xkey3));
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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((void *) (data + i * bs), (void *) (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((void *) (data + i * bs), (void *) (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,
|
|
uint8 *res)
|
|
{
|
|
ossldata *od = c->ptr;
|
|
|
|
DES_ede3_cbc_encrypt(data, res, dlen,
|
|
&od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3,
|
|
(DES_cblock *) od->iv, 0);
|
|
return 0;
|
|
}
|
|
|
|
/* CAST5 */
|
|
|
|
static int
|
|
ossl_cast_init(PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
|
|
{
|
|
ossldata *od = c->ptr;
|
|
unsigned bs = gen_ossl_block_size(c);
|
|
|
|
CAST_set_key(&od->u.cast_key, klen, key);
|
|
if (iv)
|
|
memcpy(od->iv, iv, bs);
|
|
else
|
|
memset(od->iv, 0, bs);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ossl_cast_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;
|
|
|
|
for (; data <= end; data += bs, res += bs)
|
|
CAST_ecb_encrypt(data, res, &od->u.cast_key, CAST_ENCRYPT);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ossl_cast_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;
|
|
|
|
for (; data <= end; data += bs, res += bs)
|
|
CAST_ecb_encrypt(data, res, &od->u.cast_key, CAST_DECRYPT);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ossl_cast_cbc_encrypt(PX_Cipher *c, const uint8 *data, unsigned dlen, uint8 *res)
|
|
{
|
|
ossldata *od = c->ptr;
|
|
|
|
CAST_cbc_encrypt(data, res, dlen, &od->u.cast_key, od->iv, CAST_ENCRYPT);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ossl_cast_cbc_decrypt(PX_Cipher *c, const uint8 *data, unsigned dlen, uint8 *res)
|
|
{
|
|
ossldata *od = c->ptr;
|
|
|
|
CAST_cbc_encrypt(data, res, dlen, &od->u.cast_key, od->iv, CAST_DECRYPT);
|
|
return 0;
|
|
}
|
|
|
|
/* AES */
|
|
|
|
static int
|
|
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 int
|
|
ossl_aes_key_init(ossldata *od, int type)
|
|
{
|
|
int err;
|
|
|
|
/*
|
|
* Strong key support could be missing on some openssl installations. We
|
|
* must check return value from set key function.
|
|
*/
|
|
if (type == AES_ENCRYPT)
|
|
err = AES_set_encrypt_key(od->key, od->klen * 8, &od->u.aes_key);
|
|
else
|
|
err = AES_set_decrypt_key(od->key, od->klen * 8, &od->u.aes_key);
|
|
|
|
if (err == 0)
|
|
{
|
|
od->init = 1;
|
|
return 0;
|
|
}
|
|
od->init = 0;
|
|
return PXE_KEY_TOO_BIG;
|
|
}
|
|
|
|
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;
|
|
int err;
|
|
|
|
if (!od->init)
|
|
if ((err = ossl_aes_key_init(od, AES_ENCRYPT)) != 0)
|
|
return err;
|
|
|
|
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;
|
|
int err;
|
|
|
|
if (!od->init)
|
|
if ((err = ossl_aes_key_init(od, AES_DECRYPT)) != 0)
|
|
return err;
|
|
|
|
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;
|
|
int err;
|
|
|
|
if (!od->init)
|
|
if ((err = ossl_aes_key_init(od, AES_ENCRYPT)) != 0)
|
|
return err;
|
|
|
|
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;
|
|
int err;
|
|
|
|
if (!od->init)
|
|
if ((err = ossl_aes_key_init(od, AES_DECRYPT)) != 0)
|
|
return err;
|
|
|
|
AES_cbc_encrypt(data, res, dlen, &od->u.aes_key, od->iv, AES_DECRYPT);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
};
|
|
|
|
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
|
|
};
|
|
|
|
/*
|
|
* 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},
|
|
{"aes-ecb", &ossl_aes_ecb},
|
|
{"aes-cbc", &ossl_aes_cbc},
|
|
{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) == 0)
|
|
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;
|
|
}
|
|
|
|
|
|
static int openssl_random_init = 0;
|
|
|
|
/*
|
|
* OpenSSL random should re-feeded occasionally. From /dev/urandom
|
|
* preferably.
|
|
*/
|
|
static void
|
|
init_openssl_rand(void)
|
|
{
|
|
if (RAND_get_rand_method() == NULL)
|
|
RAND_set_rand_method(RAND_SSLeay());
|
|
openssl_random_init = 1;
|
|
}
|
|
|
|
int
|
|
px_get_random_bytes(uint8 *dst, unsigned count)
|
|
{
|
|
int res;
|
|
|
|
if (!openssl_random_init)
|
|
init_openssl_rand();
|
|
|
|
res = RAND_bytes(dst, count);
|
|
if (res == 1)
|
|
return count;
|
|
|
|
return PXE_OSSL_RAND_ERROR;
|
|
}
|
|
|
|
int
|
|
px_get_pseudo_random_bytes(uint8 *dst, unsigned count)
|
|
{
|
|
int res;
|
|
|
|
if (!openssl_random_init)
|
|
init_openssl_rand();
|
|
|
|
res = RAND_pseudo_bytes(dst, count);
|
|
if (res == 0 || res == 1)
|
|
return count;
|
|
|
|
return PXE_OSSL_RAND_ERROR;
|
|
}
|
|
|
|
int
|
|
px_add_entropy(const uint8 *data, unsigned count)
|
|
{
|
|
/*
|
|
* estimate 0 bits
|
|
*/
|
|
RAND_add(data, count, 0);
|
|
return 0;
|
|
}
|