/src/openssh/openbsd-compat/libressl-api-compat.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Copyright (c) 2018 Damien Miller <djm@mindrot.org> |
3 | | * |
4 | | * Permission to use, copy, modify, and distribute this software for any |
5 | | * purpose with or without fee is hereby granted, provided that the above |
6 | | * copyright notice and this permission notice appear in all copies. |
7 | | * |
8 | | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
9 | | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
10 | | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
11 | | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
12 | | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
13 | | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
14 | | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
15 | | */ |
16 | | |
17 | | #include "includes.h" |
18 | | |
19 | | #ifdef WITH_OPENSSL |
20 | | |
21 | | #include <sys/types.h> |
22 | | |
23 | | #include <stdlib.h> |
24 | | #include <string.h> |
25 | | |
26 | | #include <openssl/evp.h> |
27 | | |
28 | | #ifndef HAVE_EVP_CIPHER_CTX_GET_IV |
29 | | int |
30 | | EVP_CIPHER_CTX_get_iv(const EVP_CIPHER_CTX *ctx, unsigned char *iv, size_t len) |
31 | 0 | { |
32 | 0 | if (ctx == NULL) |
33 | 0 | return 0; |
34 | 0 | if (EVP_CIPHER_CTX_iv_length(ctx) < 0) |
35 | 0 | return 0; |
36 | 0 | if (len != (size_t)EVP_CIPHER_CTX_iv_length(ctx)) |
37 | 0 | return 0; |
38 | 0 | if (len > EVP_MAX_IV_LENGTH) |
39 | 0 | return 0; /* sanity check; shouldn't happen */ |
40 | | /* |
41 | | * Skip the memcpy entirely when the requested IV length is zero, |
42 | | * since the iv pointer may be NULL or invalid. |
43 | | */ |
44 | 0 | if (len != 0) { |
45 | 0 | if (iv == NULL) |
46 | 0 | return 0; |
47 | 0 | # ifdef HAVE_EVP_CIPHER_CTX_IV |
48 | 0 | memcpy(iv, EVP_CIPHER_CTX_iv(ctx), len); |
49 | | # else |
50 | | memcpy(iv, ctx->iv, len); |
51 | | # endif /* HAVE_EVP_CIPHER_CTX_IV */ |
52 | 0 | } |
53 | 0 | return 1; |
54 | 0 | } |
55 | | #endif /* HAVE_EVP_CIPHER_CTX_GET_IV */ |
56 | | |
57 | | #ifndef HAVE_EVP_CIPHER_CTX_SET_IV |
58 | | int |
59 | | EVP_CIPHER_CTX_set_iv(EVP_CIPHER_CTX *ctx, const unsigned char *iv, size_t len) |
60 | 0 | { |
61 | 0 | if (ctx == NULL) |
62 | 0 | return 0; |
63 | 0 | if (EVP_CIPHER_CTX_iv_length(ctx) < 0) |
64 | 0 | return 0; |
65 | 0 | if (len != (size_t)EVP_CIPHER_CTX_iv_length(ctx)) |
66 | 0 | return 0; |
67 | 0 | if (len > EVP_MAX_IV_LENGTH) |
68 | 0 | return 0; /* sanity check; shouldn't happen */ |
69 | | /* |
70 | | * Skip the memcpy entirely when the requested IV length is zero, |
71 | | * since the iv pointer may be NULL or invalid. |
72 | | */ |
73 | 0 | if (len != 0) { |
74 | 0 | if (iv == NULL) |
75 | 0 | return 0; |
76 | 0 | # ifdef HAVE_EVP_CIPHER_CTX_IV_NOCONST |
77 | 0 | memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, len); |
78 | | # else |
79 | | memcpy(ctx->iv, iv, len); |
80 | | # endif /* HAVE_EVP_CIPHER_CTX_IV_NOCONST */ |
81 | 0 | } |
82 | 0 | return 1; |
83 | 0 | } |
84 | | #endif /* HAVE_EVP_CIPHER_CTX_SET_IV */ |
85 | | |
86 | | #endif /* WITH_OPENSSL */ |