[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include "internal/cryptlib.h"
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| 11 | #ifdef OPENSSL_NO_RSA
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| 12 | NON_EMPTY_TRANSLATION_UNIT
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| 13 | #else
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| 14 |
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| 15 | # include <stdio.h>
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| 16 | # include <openssl/evp.h>
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| 17 | # include <openssl/objects.h>
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| 18 | # include <openssl/x509.h>
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| 19 | # include <openssl/rsa.h>
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| 20 |
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| 21 | int EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
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| 22 | const unsigned char *ek, int ekl, const unsigned char *iv,
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| 23 | EVP_PKEY *priv)
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| 24 | {
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| 25 | unsigned char *key = NULL;
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| 26 | int i, size = 0, ret = 0;
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| 27 |
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| 28 | if (type) {
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| 29 | EVP_CIPHER_CTX_reset(ctx);
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| 30 | if (!EVP_DecryptInit_ex(ctx, type, NULL, NULL, NULL))
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| 31 | return 0;
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| 32 | }
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| 33 |
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| 34 | if (!priv)
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| 35 | return 1;
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| 36 |
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| 37 | if (EVP_PKEY_id(priv) != EVP_PKEY_RSA) {
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| 38 | EVPerr(EVP_F_EVP_OPENINIT, EVP_R_PUBLIC_KEY_NOT_RSA);
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| 39 | goto err;
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| 40 | }
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| 41 |
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| 42 | size = EVP_PKEY_size(priv);
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| 43 | key = OPENSSL_malloc(size + 2);
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| 44 | if (key == NULL) {
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| 45 | /* ERROR */
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| 46 | EVPerr(EVP_F_EVP_OPENINIT, ERR_R_MALLOC_FAILURE);
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| 47 | goto err;
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| 48 | }
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| 49 |
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| 50 | i = EVP_PKEY_decrypt_old(key, ek, ekl, priv);
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| 51 | if ((i <= 0) || !EVP_CIPHER_CTX_set_key_length(ctx, i)) {
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| 52 | /* ERROR */
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| 53 | goto err;
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| 54 | }
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| 55 | if (!EVP_DecryptInit_ex(ctx, NULL, NULL, key, iv))
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| 56 | goto err;
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| 57 |
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| 58 | ret = 1;
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| 59 | err:
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| 60 | OPENSSL_clear_free(key, size);
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| 61 | return (ret);
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| 62 | }
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| 63 |
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| 64 | int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
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| 65 | {
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| 66 | int i;
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| 67 |
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| 68 | i = EVP_DecryptFinal_ex(ctx, out, outl);
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| 69 | if (i)
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| 70 | i = EVP_DecryptInit_ex(ctx, NULL, NULL, NULL, NULL);
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| 71 | return (i);
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| 72 | }
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| 73 | #endif
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