mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-03 08:00:21 +08:00
9bbbf029dd
Was broken by the switch to using OpenSSL's EVP interface for ciphers, in
commit 5ff4a67f
.
Reported by Andres Freund. Fix by Michael Paquier with some kibitzing by me.
Discussion: https://www.postgresql.org/message-id/20161201014826.ic72tfkahmevpwz7@alap3.anarazel.de
805 lines
17 KiB
C
805 lines
17 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/err.h>
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#include <openssl/rand.h>
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#include "utils/memutils.h"
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#include "utils/resowner.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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/*
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* To make sure we don't leak OpenSSL handles on abort, we keep OSSLDigest
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* objects in a linked list, allocated in TopMemoryContext. We use the
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* ResourceOwner mechanism to free them on abort.
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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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ResourceOwner owner;
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struct OSSLDigest *next;
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struct OSSLDigest *prev;
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} OSSLDigest;
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static OSSLDigest *open_digests = NULL;
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static bool digest_resowner_callback_registered = false;
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static void
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free_openssl_digest(OSSLDigest *digest)
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{
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EVP_MD_CTX_destroy(digest->ctx);
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if (digest->prev)
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digest->prev->next = digest->next;
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else
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open_digests = digest->next;
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if (digest->next)
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digest->next->prev = digest->prev;
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pfree(digest);
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}
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/*
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* Close any open OpenSSL handles on abort.
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*/
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static void
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digest_free_callback(ResourceReleasePhase phase,
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bool isCommit,
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bool isTopLevel,
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void *arg)
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{
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OSSLDigest *curr;
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OSSLDigest *next;
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if (phase != RESOURCE_RELEASE_AFTER_LOCKS)
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return;
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next = open_digests;
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while (next)
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{
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curr = next;
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next = curr->next;
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if (curr->owner == CurrentResourceOwner)
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{
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if (isCommit)
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elog(WARNING, "pgcrypto digest reference leak: digest %p still referenced", curr);
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free_openssl_digest(curr);
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}
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}
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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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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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free_openssl_digest(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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EVP_MD_CTX *ctx;
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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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if (!digest_resowner_callback_registered)
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{
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RegisterResourceReleaseCallback(digest_free_callback, NULL);
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digest_resowner_callback_registered = true;
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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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/*
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* Create an OSSLDigest object, an OpenSSL MD object, and a PX_MD object.
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* The order is crucial, to make sure we don't leak anything on
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* out-of-memory or other error.
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*/
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digest = MemoryContextAlloc(TopMemoryContext, sizeof(*digest));
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ctx = EVP_MD_CTX_create();
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if (!ctx)
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{
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pfree(digest);
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return -1;
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}
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if (EVP_DigestInit_ex(ctx, md, NULL) == 0)
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{
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pfree(digest);
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return -1;
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}
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digest->algo = md;
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digest->ctx = ctx;
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digest->owner = CurrentResourceOwner;
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digest->next = open_digests;
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digest->prev = NULL;
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open_digests = digest;
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/* The PX_MD object is allocated in the current memory context. */
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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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* We use OpenSSL's EVP* family of functions for these.
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*/
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/*
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* prototype for the EVP functions that return an algorithm, e.g.
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* EVP_aes_128_cbc().
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*/
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typedef const EVP_CIPHER *(*ossl_EVP_cipher_func)(void);
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/*
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* ossl_cipher contains the static information about each cipher.
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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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ossl_EVP_cipher_func cipher_func;
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int block_size;
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int max_key_size;
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};
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/*
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* OSSLCipher contains the state for using a cipher. A separate OSSLCipher
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* object is allocated in each px_find_cipher() call.
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*
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* To make sure we don't leak OpenSSL handles on abort, we keep OSSLCipher
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* objects in a linked list, allocated in TopMemoryContext. We use the
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* ResourceOwner mechanism to free them on abort.
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*/
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typedef struct OSSLCipher
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{
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EVP_CIPHER_CTX *evp_ctx;
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const EVP_CIPHER *evp_ciph;
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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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ResourceOwner owner;
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struct OSSLCipher *next;
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struct OSSLCipher *prev;
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} OSSLCipher;
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static OSSLCipher *open_ciphers = NULL;
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static bool cipher_resowner_callback_registered = false;
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static void
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free_openssl_cipher(OSSLCipher *od)
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{
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EVP_CIPHER_CTX_free(od->evp_ctx);
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if (od->prev)
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od->prev->next = od->next;
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else
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open_ciphers = od->next;
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if (od->next)
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od->next->prev = od->prev;
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pfree(od);
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}
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/*
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* Close any open OpenSSL cipher handles on abort.
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*/
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static void
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cipher_free_callback(ResourceReleasePhase phase,
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bool isCommit,
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bool isTopLevel,
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void *arg)
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{
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OSSLCipher *curr;
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OSSLCipher *next;
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if (phase != RESOURCE_RELEASE_AFTER_LOCKS)
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return;
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next = open_ciphers;
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while (next)
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{
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curr = next;
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next = curr->next;
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if (curr->owner == CurrentResourceOwner)
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{
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if (isCommit)
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elog(WARNING, "pgcrypto cipher reference leak: cipher %p still referenced", curr);
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free_openssl_cipher(curr);
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}
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}
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}
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/* Common routines for all algorithms */
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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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OSSLCipher *od = (OSSLCipher *) 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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OSSLCipher *od = (OSSLCipher *) 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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OSSLCipher *od = (OSSLCipher *) 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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OSSLCipher *od = (OSSLCipher *) c->ptr;
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free_openssl_cipher(od);
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px_free(c);
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}
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static int
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gen_ossl_decrypt(PX_Cipher *c, const uint8 *data, unsigned dlen,
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uint8 *res)
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{
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OSSLCipher *od = c->ptr;
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int outlen;
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if (!od->init)
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{
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if (!EVP_DecryptInit_ex(od->evp_ctx, od->evp_ciph, NULL, NULL, NULL))
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return PXE_CIPHER_INIT;
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if (!EVP_CIPHER_CTX_set_key_length(od->evp_ctx, od->klen))
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return PXE_CIPHER_INIT;
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if (!EVP_DecryptInit_ex(od->evp_ctx, NULL, NULL, od->key, od->iv))
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return PXE_CIPHER_INIT;
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od->init = true;
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}
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if (!EVP_DecryptUpdate(od->evp_ctx, res, &outlen, data, dlen))
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return PXE_DECRYPT_FAILED;
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return 0;
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}
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static int
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gen_ossl_encrypt(PX_Cipher *c, const uint8 *data, unsigned dlen,
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uint8 *res)
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{
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OSSLCipher *od = c->ptr;
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int outlen;
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if (!od->init)
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{
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if (!EVP_EncryptInit_ex(od->evp_ctx, od->evp_ciph, NULL, NULL, NULL))
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return PXE_CIPHER_INIT;
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if (!EVP_CIPHER_CTX_set_key_length(od->evp_ctx, od->klen))
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return PXE_CIPHER_INIT;
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if (!EVP_EncryptInit_ex(od->evp_ctx, NULL, NULL, od->key, od->iv))
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return PXE_CIPHER_INIT;
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od->init = true;
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}
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if (!EVP_EncryptUpdate(od->evp_ctx, res, &outlen, data, dlen))
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return PXE_ERR_GENERIC;
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return 0;
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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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uint8 out[8];
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EVP_CIPHER_CTX *evp_ctx;
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int outlen;
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int status = 0;
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/* encrypt with 448bits key and verify output */
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evp_ctx = EVP_CIPHER_CTX_new();
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if (!evp_ctx)
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return 0;
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if (!EVP_EncryptInit_ex(evp_ctx, EVP_bf_ecb(), NULL, NULL, NULL))
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goto leave;
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if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, 56))
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goto leave;
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if (!EVP_EncryptInit_ex(evp_ctx, NULL, NULL, key, NULL))
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goto leave;
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if (!EVP_EncryptUpdate(evp_ctx, out, &outlen, data, 8))
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goto leave;
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if (memcmp(out, res, 8) != 0)
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goto leave; /* Output does not match -> strong cipher is
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* not supported */
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status = 1;
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leave:
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EVP_CIPHER_CTX_free(evp_ctx);
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return status;
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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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OSSLCipher *od = c->ptr;
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unsigned bs = gen_ossl_block_size(c);
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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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od->klen = klen;
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memcpy(od->key, key, klen);
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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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/* 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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OSSLCipher *od = c->ptr;
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unsigned bs = gen_ossl_block_size(c);
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od->klen = 8;
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memset(od->key, 0, 8);
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memcpy(od->key, key, klen > 8 ? 8 : klen);
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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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/* 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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OSSLCipher *od = c->ptr;
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unsigned bs = gen_ossl_block_size(c);
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od->klen = 24;
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memset(od->key, 0, 24);
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memcpy(od->key, key, klen > 24 ? 24 : klen);
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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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/* 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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OSSLCipher *od = c->ptr;
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unsigned bs = gen_ossl_block_size(c);
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|
|
od->klen = klen;
|
|
memcpy(od->key, key, klen);
|
|
|
|
if (iv)
|
|
memcpy(od->iv, iv, bs);
|
|
else
|
|
memset(od->iv, 0, bs);
|
|
return 0;
|
|
}
|
|
|
|
/* AES */
|
|
|
|
static int
|
|
ossl_aes_init(PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
|
|
{
|
|
OSSLCipher *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_ecb_init(PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
|
|
{
|
|
OSSLCipher *od = c->ptr;
|
|
int err;
|
|
|
|
err = ossl_aes_init(c, key, klen, iv);
|
|
if (err)
|
|
return err;
|
|
|
|
switch (od->klen)
|
|
{
|
|
case 128 / 8:
|
|
od->evp_ciph = EVP_aes_128_ecb();
|
|
break;
|
|
case 192 / 8:
|
|
od->evp_ciph = EVP_aes_192_ecb();
|
|
break;
|
|
case 256 / 8:
|
|
od->evp_ciph = EVP_aes_256_ecb();
|
|
break;
|
|
default:
|
|
/* shouldn't happen */
|
|
err = PXE_CIPHER_INIT;
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
ossl_aes_cbc_init(PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
|
|
{
|
|
OSSLCipher *od = c->ptr;
|
|
int err;
|
|
|
|
err = ossl_aes_init(c, key, klen, iv);
|
|
if (err)
|
|
return err;
|
|
|
|
switch (od->klen)
|
|
{
|
|
case 128 / 8:
|
|
od->evp_ciph = EVP_aes_128_cbc();
|
|
break;
|
|
case 192 / 8:
|
|
od->evp_ciph = EVP_aes_192_cbc();
|
|
break;
|
|
case 256 / 8:
|
|
od->evp_ciph = EVP_aes_256_cbc();
|
|
break;
|
|
default:
|
|
/* shouldn't happen */
|
|
err = PXE_CIPHER_INIT;
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* 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,
|
|
EVP_bf_cbc,
|
|
64 / 8, 448 / 8
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_bf_ecb = {
|
|
bf_init,
|
|
EVP_bf_ecb,
|
|
64 / 8, 448 / 8
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_bf_cfb = {
|
|
bf_init,
|
|
EVP_bf_cfb,
|
|
64 / 8, 448 / 8
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_des_ecb = {
|
|
ossl_des_init,
|
|
EVP_des_ecb,
|
|
64 / 8, 64 / 8
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_des_cbc = {
|
|
ossl_des_init,
|
|
EVP_des_cbc,
|
|
64 / 8, 64 / 8
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_des3_ecb = {
|
|
ossl_des3_init,
|
|
EVP_des_ede3_ecb,
|
|
64 / 8, 192 / 8
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_des3_cbc = {
|
|
ossl_des3_init,
|
|
EVP_des_ede3_cbc,
|
|
64 / 8, 192 / 8
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_cast_ecb = {
|
|
ossl_cast_init,
|
|
EVP_cast5_ecb,
|
|
64 / 8, 128 / 8
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_cast_cbc = {
|
|
ossl_cast_init,
|
|
EVP_cast5_cbc,
|
|
64 / 8, 128 / 8
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_aes_ecb = {
|
|
ossl_aes_ecb_init,
|
|
NULL, /* EVP_aes_XXX_ecb(), determined in init function */
|
|
128 / 8, 256 / 8
|
|
};
|
|
|
|
static const struct ossl_cipher ossl_aes_cbc = {
|
|
ossl_aes_cbc_init,
|
|
NULL, /* EVP_aes_XXX_cbc(), determined in init function */
|
|
128 / 8, 256 / 8
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
EVP_CIPHER_CTX *ctx;
|
|
OSSLCipher *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;
|
|
|
|
if (!cipher_resowner_callback_registered)
|
|
{
|
|
RegisterResourceReleaseCallback(cipher_free_callback, NULL);
|
|
cipher_resowner_callback_registered = true;
|
|
}
|
|
|
|
/*
|
|
* Create an OSSLCipher object, an EVP_CIPHER_CTX object and a PX_Cipher.
|
|
* The order is crucial, to make sure we don't leak anything on
|
|
* out-of-memory or other error.
|
|
*/
|
|
od = MemoryContextAllocZero(TopMemoryContext, sizeof(*od));
|
|
od->ciph = i->ciph;
|
|
|
|
/* Allocate an EVP_CIPHER_CTX object. */
|
|
ctx = EVP_CIPHER_CTX_new();
|
|
if (!ctx)
|
|
{
|
|
pfree(od);
|
|
return PXE_CIPHER_INIT;
|
|
}
|
|
|
|
od->evp_ctx = ctx;
|
|
od->owner = CurrentResourceOwner;
|
|
od->next = open_ciphers;
|
|
od->prev = NULL;
|
|
open_ciphers = od;
|
|
|
|
if (i->ciph->cipher_func)
|
|
od->evp_ciph = i->ciph->cipher_func();
|
|
|
|
/* The PX_Cipher is allocated in current memory context */
|
|
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 = gen_ossl_encrypt;
|
|
c->decrypt = gen_ossl_decrypt;
|
|
c->ptr = od;
|
|
|
|
*res = c;
|
|
return 0;
|
|
}
|