1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
3 | * |
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at |
7 | * https://www.openssl.org/source/license.html |
8 | */ |
9 | |
10 | #include "internal/cryptlib.h" |
11 | #ifdef OPENSSL_NO_RSA |
12 | NON_EMPTY_TRANSLATION_UNIT |
13 | #else |
14 | |
15 | # include <stdio.h> |
16 | # include <openssl/evp.h> |
17 | # include <openssl/objects.h> |
18 | # include <openssl/x509.h> |
19 | # include <openssl/rsa.h> |
20 | |
21 | int EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, |
22 | const unsigned char *ek, int ekl, const unsigned char *iv, |
23 | EVP_PKEY *priv) |
24 | { |
25 | unsigned char *key = NULL; |
26 | int i, size = 0, ret = 0; |
27 | |
28 | if (type) { |
29 | EVP_CIPHER_CTX_reset(ctx); |
30 | if (!EVP_DecryptInit_ex(ctx, type, NULL, NULL, NULL)) |
31 | return 0; |
32 | } |
33 | |
34 | if (priv == NULL) |
35 | return 1; |
36 | |
37 | if (EVP_PKEY_id(priv) != EVP_PKEY_RSA) { |
38 | EVPerr(EVP_F_EVP_OPENINIT, EVP_R_PUBLIC_KEY_NOT_RSA); |
39 | goto err; |
40 | } |
41 | |
42 | size = EVP_PKEY_size(priv); |
43 | key = OPENSSL_malloc(size); |
44 | if (key == NULL) { |
45 | /* ERROR */ |
46 | EVPerr(EVP_F_EVP_OPENINIT, ERR_R_MALLOC_FAILURE); |
47 | goto err; |
48 | } |
49 | |
50 | i = EVP_PKEY_decrypt_old(key, ek, ekl, priv); |
51 | if ((i <= 0) || !EVP_CIPHER_CTX_set_key_length(ctx, i)) { |
52 | /* ERROR */ |
53 | goto err; |
54 | } |
55 | if (!EVP_DecryptInit_ex(ctx, NULL, NULL, key, iv)) |
56 | goto err; |
57 | |
58 | ret = 1; |
59 | err: |
60 | OPENSSL_clear_free(key, size); |
61 | return ret; |
62 | } |
63 | |
64 | int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
65 | { |
66 | int i; |
67 | |
68 | i = EVP_DecryptFinal_ex(ctx, out, outl); |
69 | if (i) |
70 | i = EVP_DecryptInit_ex(ctx, NULL, NULL, NULL, NULL); |
71 | return i; |
72 | } |
73 | #endif |
74 | |