347 lines
12 KiB
C
347 lines
12 KiB
C
/* pmeth_fn.c */
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/*
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
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* 2006.
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*/
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/* ====================================================================
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* Copyright (c) 2006 The OpenSSL Project. 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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*
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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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "cryptlib.h"
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#include "evp_locl.h"
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#define M_check_autoarg(ctx, arg, arglen, err) \
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if (ctx->pmeth->flags & EVP_PKEY_FLAG_AUTOARGLEN) \
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{ \
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size_t pksize = (size_t)EVP_PKEY_size(ctx->pkey); \
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if (!arg) \
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{ \
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*arglen = pksize; \
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return 1; \
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} \
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else if (*arglen < pksize) \
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{ \
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EVPerr(err, EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/\
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return 0; \
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} \
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}
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int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
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{
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int ret;
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if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) {
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EVPerr(EVP_F_EVP_PKEY_SIGN_INIT,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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ctx->operation = EVP_PKEY_OP_SIGN;
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if (!ctx->pmeth->sign_init)
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return 1;
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ret = ctx->pmeth->sign_init(ctx);
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if (ret <= 0)
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ctx->operation = EVP_PKEY_OP_UNDEFINED;
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return ret;
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}
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int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
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unsigned char *sig, size_t *siglen,
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const unsigned char *tbs, size_t tbslen)
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{
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if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) {
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EVPerr(EVP_F_EVP_PKEY_SIGN,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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if (ctx->operation != EVP_PKEY_OP_SIGN) {
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EVPerr(EVP_F_EVP_PKEY_SIGN, EVP_R_OPERATON_NOT_INITIALIZED);
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return -1;
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}
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M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN)
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return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen);
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}
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int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
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{
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int ret;
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if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) {
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EVPerr(EVP_F_EVP_PKEY_VERIFY_INIT,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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ctx->operation = EVP_PKEY_OP_VERIFY;
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if (!ctx->pmeth->verify_init)
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return 1;
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ret = ctx->pmeth->verify_init(ctx);
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if (ret <= 0)
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ctx->operation = EVP_PKEY_OP_UNDEFINED;
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return ret;
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}
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int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
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const unsigned char *sig, size_t siglen,
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const unsigned char *tbs, size_t tbslen)
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{
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if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) {
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EVPerr(EVP_F_EVP_PKEY_VERIFY,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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if (ctx->operation != EVP_PKEY_OP_VERIFY) {
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EVPerr(EVP_F_EVP_PKEY_VERIFY, EVP_R_OPERATON_NOT_INITIALIZED);
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return -1;
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}
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return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen);
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}
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int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx)
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{
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int ret;
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if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover) {
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EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER_INIT,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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ctx->operation = EVP_PKEY_OP_VERIFYRECOVER;
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if (!ctx->pmeth->verify_recover_init)
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return 1;
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ret = ctx->pmeth->verify_recover_init(ctx);
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if (ret <= 0)
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ctx->operation = EVP_PKEY_OP_UNDEFINED;
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return ret;
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}
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int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
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unsigned char *rout, size_t *routlen,
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const unsigned char *sig, size_t siglen)
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{
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if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover) {
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EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) {
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EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER, EVP_R_OPERATON_NOT_INITIALIZED);
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return -1;
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}
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M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER)
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return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen);
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}
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int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx)
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{
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int ret;
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if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
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EVPerr(EVP_F_EVP_PKEY_ENCRYPT_INIT,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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ctx->operation = EVP_PKEY_OP_ENCRYPT;
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if (!ctx->pmeth->encrypt_init)
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return 1;
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ret = ctx->pmeth->encrypt_init(ctx);
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if (ret <= 0)
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ctx->operation = EVP_PKEY_OP_UNDEFINED;
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return ret;
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}
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int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx,
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unsigned char *out, size_t *outlen,
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const unsigned char *in, size_t inlen)
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{
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if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
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EVPerr(EVP_F_EVP_PKEY_ENCRYPT,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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if (ctx->operation != EVP_PKEY_OP_ENCRYPT) {
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EVPerr(EVP_F_EVP_PKEY_ENCRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
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return -1;
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}
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M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_ENCRYPT)
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return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen);
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}
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int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx)
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{
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int ret;
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if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
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EVPerr(EVP_F_EVP_PKEY_DECRYPT_INIT,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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ctx->operation = EVP_PKEY_OP_DECRYPT;
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if (!ctx->pmeth->decrypt_init)
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return 1;
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ret = ctx->pmeth->decrypt_init(ctx);
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if (ret <= 0)
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ctx->operation = EVP_PKEY_OP_UNDEFINED;
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return ret;
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}
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int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
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unsigned char *out, size_t *outlen,
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const unsigned char *in, size_t inlen)
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{
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if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
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EVPerr(EVP_F_EVP_PKEY_DECRYPT,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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if (ctx->operation != EVP_PKEY_OP_DECRYPT) {
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EVPerr(EVP_F_EVP_PKEY_DECRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
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return -1;
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}
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M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_DECRYPT)
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return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen);
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}
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int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx)
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{
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int ret;
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if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) {
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EVPerr(EVP_F_EVP_PKEY_DERIVE_INIT,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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ctx->operation = EVP_PKEY_OP_DERIVE;
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if (!ctx->pmeth->derive_init)
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return 1;
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ret = ctx->pmeth->derive_init(ctx);
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if (ret <= 0)
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ctx->operation = EVP_PKEY_OP_UNDEFINED;
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return ret;
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}
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int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer)
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{
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int ret;
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if (!ctx || !ctx->pmeth
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|| !(ctx->pmeth->derive || ctx->pmeth->encrypt || ctx->pmeth->decrypt)
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|| !ctx->pmeth->ctrl) {
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EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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if (ctx->operation != EVP_PKEY_OP_DERIVE
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&& ctx->operation != EVP_PKEY_OP_ENCRYPT
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&& ctx->operation != EVP_PKEY_OP_DECRYPT) {
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EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER,
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EVP_R_OPERATON_NOT_INITIALIZED);
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return -1;
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}
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ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 0, peer);
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if (ret <= 0)
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return ret;
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if (ret == 2)
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return 1;
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if (!ctx->pkey) {
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EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, EVP_R_NO_KEY_SET);
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return -1;
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}
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if (ctx->pkey->type != peer->type) {
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EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, EVP_R_DIFFERENT_KEY_TYPES);
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return -1;
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}
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/*
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* ran@cryptocom.ru: For clarity. The error is if parameters in peer are
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* present (!missing) but don't match. EVP_PKEY_cmp_parameters may return
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* 1 (match), 0 (don't match) and -2 (comparison is not defined). -1
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* (different key types) is impossible here because it is checked earlier.
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* -2 is OK for us here, as well as 1, so we can check for 0 only.
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*/
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if (!EVP_PKEY_missing_parameters(peer) &&
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!EVP_PKEY_cmp_parameters(ctx->pkey, peer)) {
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EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, EVP_R_DIFFERENT_PARAMETERS);
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return -1;
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}
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if (ctx->peerkey)
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EVP_PKEY_free(ctx->peerkey);
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ctx->peerkey = peer;
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ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer);
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if (ret <= 0) {
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ctx->peerkey = NULL;
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return ret;
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}
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CRYPTO_add(&peer->references, 1, CRYPTO_LOCK_EVP_PKEY);
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return 1;
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}
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int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *pkeylen)
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{
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if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) {
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EVPerr(EVP_F_EVP_PKEY_DERIVE,
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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if (ctx->operation != EVP_PKEY_OP_DERIVE) {
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EVPerr(EVP_F_EVP_PKEY_DERIVE, EVP_R_OPERATON_NOT_INITIALIZED);
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return -1;
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}
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M_check_autoarg(ctx, key, pkeylen, EVP_F_EVP_PKEY_DERIVE)
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return ctx->pmeth->derive(ctx, key, pkeylen);
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}
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