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Commit | Line | Data |
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aa6bb135 | 1 | /* |
1212818e | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
4a8b0c55 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
aa6bb135 RS |
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 | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
b39fc560 | 11 | #include "internal/cryptlib.h" |
ec577822 | 12 | #include <openssl/rand.h> |
3c27208f | 13 | #include <openssl/rsa.h> |
ec577822 BM |
14 | #include <openssl/evp.h> |
15 | #include <openssl/objects.h> | |
16 | #include <openssl/x509.h> | |
d02b48c6 | 17 | |
0f113f3e MC |
18 | int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, |
19 | unsigned char **ek, int *ekl, unsigned char *iv, | |
20 | EVP_PKEY **pubk, int npubk) | |
21 | { | |
22 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
23 | int i; | |
2eb2b4f3 | 24 | int rv = 0; |
0f113f3e MC |
25 | |
26 | if (type) { | |
846ec07d | 27 | EVP_CIPHER_CTX_reset(ctx); |
0f113f3e MC |
28 | if (!EVP_EncryptInit_ex(ctx, type, NULL, NULL, NULL)) |
29 | return 0; | |
30 | } | |
31 | if ((npubk <= 0) || !pubk) | |
32 | return 1; | |
9420b403 | 33 | |
0f113f3e MC |
34 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) |
35 | return 0; | |
2eb2b4f3 | 36 | |
16cfc2c9 | 37 | if (EVP_CIPHER_CTX_iv_length(ctx) |
2eb2b4f3 SL |
38 | && RAND_bytes(iv, EVP_CIPHER_CTX_iv_length(ctx)) <= 0) |
39 | goto err; | |
d02b48c6 | 40 | |
0f113f3e | 41 | if (!EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv)) |
2eb2b4f3 | 42 | goto err; |
58964a49 | 43 | |
0f113f3e | 44 | for (i = 0; i < npubk; i++) { |
9420b403 RL |
45 | size_t keylen = EVP_CIPHER_CTX_key_length(ctx); |
46 | EVP_PKEY_CTX *pctx = NULL; | |
47 | ||
48 | if ((pctx = EVP_PKEY_CTX_new(pubk[i], NULL)) == NULL) { | |
49 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); | |
2eb2b4f3 SL |
50 | goto err; |
51 | } | |
9420b403 RL |
52 | |
53 | if (EVP_PKEY_encrypt_init(pctx) <= 0 | |
54 | || EVP_PKEY_encrypt(pctx, ek[i], &keylen, key, keylen) <= 0) | |
55 | goto err; | |
56 | ekl[i] = (int)keylen; | |
57 | EVP_PKEY_CTX_free(pctx); | |
0f113f3e | 58 | } |
2eb2b4f3 SL |
59 | rv = npubk; |
60 | err: | |
61 | OPENSSL_cleanse(key, sizeof(key)); | |
62 | return rv; | |
0f113f3e | 63 | } |
d02b48c6 | 64 | |
e9ba6963 | 65 | int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
66 | { |
67 | int i; | |
68 | i = EVP_EncryptFinal_ex(ctx, out, outl); | |
69 | if (i) | |
70 | i = EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, NULL); | |
71 | return i; | |
72 | } |