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/*
* Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "internal/cryptlib.h"
#include <stdio.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include <openssl/rsa.h>
int EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
const unsigned char *ek, int ekl, const unsigned char *iv,
EVP_PKEY *priv)
{
unsigned char *key = NULL;
size_t keylen = 0;
int ret = 0;
EVP_PKEY_CTX *pctx = NULL;
if (type) {
EVP_CIPHER_CTX_reset(ctx);
if (!EVP_DecryptInit_ex(ctx, type, NULL, NULL, NULL))
goto err;
}
if (priv == NULL)
return 1;
if ((pctx = EVP_PKEY_CTX_new(priv, NULL)) == NULL) {
ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
goto err;
}
if (EVP_PKEY_decrypt_init(pctx) <= 0
|| EVP_PKEY_decrypt(pctx, NULL, &keylen, ek, ekl) <= 0)
goto err;
if ((key = OPENSSL_malloc(keylen)) == NULL) {
ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
goto err;
}
if (EVP_PKEY_decrypt(pctx, key, &keylen, ek, ekl) <= 0)
goto err;
if (!EVP_CIPHER_CTX_set_key_length(ctx, keylen)
|| !EVP_DecryptInit_ex(ctx, NULL, NULL, key, iv))
goto err;
ret = 1;
err:
EVP_PKEY_CTX_free(pctx);
OPENSSL_clear_free(key, keylen);
return ret;
}
int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
int i;
i = EVP_DecryptFinal_ex(ctx, out, outl);
if (i)
i = EVP_DecryptInit_ex(ctx, NULL, NULL, NULL, NULL);
return i;
}
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