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author | tb <> | 2019-03-17 17:42:37 +0000 |
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committer | tb <> | 2019-03-17 17:42:37 +0000 |
commit | c8acd603ab3f519a4bfe159fe808dc94fb3d7b1d (patch) | |
tree | e7748056894786129bb207a2b1e279e8dd2d2eb9 /src/lib/libcrypto/evp/e_sm4.c | |
parent | 06bdba97e3fb8c99bcbb5665009130127e348e06 (diff) | |
download | openbsd-c8acd603ab3f519a4bfe159fe808dc94fb3d7b1d.tar.gz openbsd-c8acd603ab3f519a4bfe159fe808dc94fb3d7b1d.tar.bz2 openbsd-c8acd603ab3f519a4bfe159fe808dc94fb3d7b1d.zip |
Add the SM4 block cipher from the Chinese standard GB/T 32907-2016.
This is an ISC licensed version based on the sources by Ribose Inc
that were ported to OpenSSL in 2017.
Patch from Daniel Wyatt with minor tweaks.
ok inoguchi, jsing
Diffstat (limited to 'src/lib/libcrypto/evp/e_sm4.c')
-rw-r--r-- | src/lib/libcrypto/evp/e_sm4.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/lib/libcrypto/evp/e_sm4.c b/src/lib/libcrypto/evp/e_sm4.c new file mode 100644 index 0000000000..554915b29c --- /dev/null +++ b/src/lib/libcrypto/evp/e_sm4.c | |||
@@ -0,0 +1,113 @@ | |||
1 | /* $OpenBSD: e_sm4.c,v 1.1 2019/03/17 17:42:37 tb Exp $ */ | ||
2 | /* | ||
3 | * Copyright (c) 2017, 2019 Ribose Inc | ||
4 | * | ||
5 | * Permission to use, copy, modify, and/or distribute this software for any | ||
6 | * purpose with or without fee is hereby granted, provided that the above | ||
7 | * copyright notice and this permission notice appear in all copies. | ||
8 | * | ||
9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | ||
12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | ||
14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | ||
15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
16 | */ | ||
17 | |||
18 | #include <openssl/opensslconf.h> | ||
19 | |||
20 | #ifndef OPENSSL_NO_SM4 | ||
21 | #include <openssl/evp.h> | ||
22 | #include <openssl/modes.h> | ||
23 | #include <openssl/sm4.h> | ||
24 | |||
25 | #include "evp_locl.h" | ||
26 | |||
27 | typedef struct { | ||
28 | SM4_KEY ks; | ||
29 | } EVP_SM4_KEY; | ||
30 | |||
31 | static int | ||
32 | sm4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | ||
33 | const unsigned char *iv, int enc) | ||
34 | { | ||
35 | SM4_set_key(key, ctx->cipher_data); | ||
36 | return 1; | ||
37 | } | ||
38 | |||
39 | static void | ||
40 | sm4_cbc_encrypt(const unsigned char *in, unsigned char *out, size_t len, | ||
41 | const SM4_KEY *key, unsigned char *ivec, const int enc) | ||
42 | { | ||
43 | if (enc) | ||
44 | CRYPTO_cbc128_encrypt(in, out, len, key, ivec, | ||
45 | (block128_f)SM4_encrypt); | ||
46 | else | ||
47 | CRYPTO_cbc128_decrypt(in, out, len, key, ivec, | ||
48 | (block128_f)SM4_decrypt); | ||
49 | } | ||
50 | |||
51 | static void | ||
52 | sm4_cfb128_encrypt(const unsigned char *in, unsigned char *out, size_t length, | ||
53 | const SM4_KEY *key, unsigned char *ivec, int *num, const int enc) | ||
54 | { | ||
55 | CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc, | ||
56 | (block128_f)SM4_encrypt); | ||
57 | } | ||
58 | |||
59 | static void | ||
60 | sm4_ecb_encrypt(const unsigned char *in, unsigned char *out, const SM4_KEY *key, | ||
61 | const int enc) | ||
62 | { | ||
63 | if (enc) | ||
64 | SM4_encrypt(in, out, key); | ||
65 | else | ||
66 | SM4_decrypt(in, out, key); | ||
67 | } | ||
68 | |||
69 | static void | ||
70 | sm4_ofb128_encrypt(const unsigned char *in, unsigned char *out, size_t length, | ||
71 | const SM4_KEY *key, unsigned char *ivec, int *num) | ||
72 | { | ||
73 | CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num, | ||
74 | (block128_f)SM4_encrypt); | ||
75 | } | ||
76 | |||
77 | IMPLEMENT_BLOCK_CIPHER(sm4, ks, sm4, EVP_SM4_KEY, NID_sm4, 16, 16, 16, 128, | ||
78 | EVP_CIPH_FLAG_DEFAULT_ASN1, sm4_init_key, NULL, 0, 0, 0) | ||
79 | |||
80 | static int | ||
81 | sm4_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, | ||
82 | size_t len) | ||
83 | { | ||
84 | EVP_SM4_KEY *key = EVP_C_DATA(EVP_SM4_KEY, ctx); | ||
85 | |||
86 | CRYPTO_ctr128_encrypt(in, out, len, &key->ks, ctx->iv, ctx->buf, | ||
87 | &ctx->num, (block128_f)SM4_encrypt); | ||
88 | return 1; | ||
89 | } | ||
90 | |||
91 | static const EVP_CIPHER sm4_ctr_mode = { | ||
92 | .nid = NID_sm4_ctr, | ||
93 | .block_size = 1, | ||
94 | .key_len = 16, | ||
95 | .iv_len = 16, | ||
96 | .flags = EVP_CIPH_CTR_MODE, | ||
97 | .init = sm4_init_key, | ||
98 | .do_cipher = sm4_ctr_cipher, | ||
99 | .cleanup = NULL, | ||
100 | .ctx_size = sizeof(EVP_SM4_KEY), | ||
101 | .set_asn1_parameters = NULL, | ||
102 | .get_asn1_parameters = NULL, | ||
103 | .ctrl = NULL, | ||
104 | .app_data = NULL, | ||
105 | }; | ||
106 | |||
107 | const EVP_CIPHER * | ||
108 | EVP_sm4_ctr(void) | ||
109 | { | ||
110 | return &sm4_ctr_mode; | ||
111 | } | ||
112 | |||
113 | #endif | ||