74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
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/*
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* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "internal/cryptlib.h"
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#ifdef OPENSSL_NO_RSA
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NON_EMPTY_TRANSLATION_UNIT
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#else
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# include <stdio.h>
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# include <openssl/evp.h>
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# include <openssl/objects.h>
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# include <openssl/x509.h>
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# include <openssl/rsa.h>
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int EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
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const unsigned char *ek, int ekl, const unsigned char *iv,
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EVP_PKEY *priv)
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{
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unsigned char *key = NULL;
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int i, size = 0, ret = 0;
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if (type) {
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EVP_CIPHER_CTX_reset(ctx);
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if (!EVP_DecryptInit_ex(ctx, type, NULL, NULL, NULL))
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return 0;
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}
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if (!priv)
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return 1;
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if (EVP_PKEY_id(priv) != EVP_PKEY_RSA) {
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EVPerr(EVP_F_EVP_OPENINIT, EVP_R_PUBLIC_KEY_NOT_RSA);
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goto err;
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}
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size = EVP_PKEY_size(priv);
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key = OPENSSL_malloc(size);
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if (key == NULL) {
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/* ERROR */
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EVPerr(EVP_F_EVP_OPENINIT, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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i = EVP_PKEY_decrypt_old(key, ek, ekl, priv);
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if ((i <= 0) || !EVP_CIPHER_CTX_set_key_length(ctx, i)) {
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/* ERROR */
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goto err;
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}
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if (!EVP_DecryptInit_ex(ctx, NULL, NULL, key, iv))
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goto err;
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ret = 1;
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err:
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OPENSSL_clear_free(key, size);
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return ret;
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}
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int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
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{
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int i;
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i = EVP_DecryptFinal_ex(ctx, out, outl);
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if (i)
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i = EVP_DecryptInit_ex(ctx, NULL, NULL, NULL, NULL);
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return i;
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}
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#endif
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