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authortb <>2019-03-17 17:42:37 +0000
committertb <>2019-03-17 17:42:37 +0000
commitc8acd603ab3f519a4bfe159fe808dc94fb3d7b1d (patch)
treee7748056894786129bb207a2b1e279e8dd2d2eb9 /src/lib/libcrypto/evp/e_sm4.c
parent06bdba97e3fb8c99bcbb5665009130127e348e06 (diff)
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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.c113
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
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--- /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
27typedef struct {
28 SM4_KEY ks;
29} EVP_SM4_KEY;
30
31static int
32sm4_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
39static void
40sm4_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
51static void
52sm4_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
59static void
60sm4_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
69static void
70sm4_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
77IMPLEMENT_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
80static int
81sm4_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
91static 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
107const EVP_CIPHER *
108EVP_sm4_ctr(void)
109{
110 return &sm4_ctr_mode;
111}
112
113#endif