1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
From f20f3e1c7f498bbc2a83a749ed38a795d54a5c25 Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Fri, 15 Nov 2019 20:19:37 -0800
Subject: [PATCH] Add support for some BearSSL crypto primitives
---
src/crypto/crypto_bearssl.c | 171 ++++++++++++++++++++++++++++++++++++
1 file changed, 171 insertions(+)
create mode 100644 src/crypto/crypto_bearssl.c
diff --git a/src/crypto/crypto_bearssl.c b/src/crypto/crypto_bearssl.c
new file mode 100644
index 000000000..4f1b64e24
--- /dev/null
+++ b/src/crypto/crypto_bearssl.c
@@ -0,0 +1,171 @@
+/*
+ * Wrapper functions for BearSSL crypto
+ * Copyright (c) 2019, Michael Forney <mforney@mforney.org>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "includes.h"
+#include <bearssl.h>
+
+#include "common.h"
+#include "md5.h"
+#include "crypto.h"
+
+static int digest_vector(size_t num_elem, const u8 *addr[], const size_t *len,
+ u8 *out, const br_hash_class *hash)
+{
+ br_hash_compat_context ctx;
+ size_t i;
+
+ hash->init(&ctx.vtable);
+ for (i = 0; i < num_elem; ++i)
+ hash->update(&ctx.vtable, addr[i], len[i]);
+ hash->out(&ctx.vtable, out);
+
+ return 0;
+}
+
+int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *out)
+{
+ return digest_vector(num_elem, addr, len, out, &br_sha1_vtable);
+}
+
+int sha256_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *out)
+{
+ return digest_vector(num_elem, addr, len, out, &br_sha256_vtable);
+}
+
+static int hmac_vector(const u8 *key, size_t key_len, size_t num_elem,
+ const u8 *addr[], const size_t *len, u8 *mac,
+ const br_hash_class *type)
+{
+ br_hmac_key_context kc;
+ br_hmac_context ctx;
+ size_t i;
+
+ br_hmac_key_init(&kc, type, key, key_len);
+ br_hmac_init(&ctx, &kc, 0);
+ for (i = 0; i < num_elem; ++i)
+ br_hmac_update(&ctx, addr[i], len[i]);
+ br_hmac_out(&ctx, mac);
+
+ return 0;
+}
+
+int hmac_sha256_vector(const u8 *key, size_t key_len, size_t num_elem,
+ const u8 *addr[], const size_t *len, u8 *mac)
+{
+ return hmac_vector(key, key_len, num_elem, addr, len, mac, &br_sha256_vtable);
+}
+
+int hmac_sha256(const u8 *key, size_t key_len, const u8 *data,
+ size_t data_len, u8 *mac)
+{
+ return hmac_sha256_vector(key, key_len, 1, &data, &data_len, mac);
+}
+
+int hmac_sha1_vector(const u8 *key, size_t key_len, size_t num_elem,
+ const u8 *addr[], const size_t *len, u8 *mac)
+{
+ return hmac_vector(key, key_len, num_elem, addr, len, mac, &br_sha1_vtable);
+}
+
+int hmac_sha1(const u8 *key, size_t key_len, const u8 *data, size_t data_len,
+ u8 *mac)
+{
+ return hmac_sha1_vector(key, key_len, 1, &data, &data_len, mac);
+}
+
+int hmac_md5(const u8 *key, size_t key_len, const u8 *data, size_t data_len,
+ u8 *mac)
+{
+ return hmac_vector(key, key_len, 1, &data, &data_len, mac, &br_md5_vtable);
+}
+
+void *aes_encrypt_init(const u8 *key, size_t len)
+{
+ br_aes_ct64_cbcenc_keys *ctx;
+
+ if (len != 16 && len != 24 && len != 32)
+ return NULL;
+ ctx = os_malloc(sizeof *ctx);
+ if (ctx == NULL)
+ return NULL;
+ br_aes_ct64_cbcenc_init(ctx, key, len);
+ return ctx;
+}
+
+int aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
+{
+ unsigned char iv[br_aes_ct64_BLOCK_SIZE];
+
+ memset(iv, 0, sizeof iv);
+ memcpy(crypt, plain, br_aes_ct64_BLOCK_SIZE);
+ br_aes_ct64_cbcenc_run(ctx, iv, crypt, br_aes_ct64_BLOCK_SIZE);
+ return 0;
+}
+
+void aes_encrypt_deinit(void *ctx)
+{
+ os_free(ctx);
+}
+
+void *aes_decrypt_init(const u8 *key, size_t len)
+{
+ br_aes_ct64_cbcdec_keys *ctx;
+
+ if (len != 16 && len != 24 && len != 32)
+ return NULL;
+ ctx = os_malloc(sizeof *ctx);
+ if (ctx == NULL)
+ return NULL;
+ br_aes_ct64_cbcdec_init(ctx, key, len);
+ return ctx;
+}
+
+int aes_decrypt(void *ctx, const u8 *plain, u8 *crypt)
+{
+ unsigned char iv[br_aes_ct64_BLOCK_SIZE];
+
+ memset(iv, 0, sizeof iv);
+ memcpy(crypt, plain, br_aes_ct64_BLOCK_SIZE);
+ br_aes_ct64_cbcdec_run(ctx, iv, crypt, br_aes_ct64_BLOCK_SIZE);
+ return 0;
+}
+
+void aes_decrypt_deinit(void *ctx)
+{
+ os_free(ctx);
+}
+
+int aes_128_cbc_encrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len)
+{
+ br_aes_ct64_cbcenc_keys ctx;
+ u8 ivbuf[br_aes_ct64_BLOCK_SIZE];
+
+ if (data_len & 0xF)
+ return -1;
+ memcpy(ivbuf, iv, sizeof ivbuf);
+ br_aes_ct64_cbcenc_init(&ctx, key, 16);
+ br_aes_ct64_cbcenc_run(&ctx, ivbuf, data, data_len);
+ return 0;
+}
+
+int aes_128_cbc_decrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len)
+{
+ br_aes_ct64_cbcdec_keys ctx;
+ u8 ivbuf[br_aes_ct64_BLOCK_SIZE];
+
+ if (data_len & 0xF)
+ return -1;
+ memcpy(ivbuf, iv, sizeof ivbuf);
+ br_aes_ct64_cbcdec_init(&ctx, key, 16);
+ br_aes_ct64_cbcdec_run(&ctx, ivbuf, data, data_len);
+ return 0;
+}
+
+void crypto_unload(void)
+{
+}
--
2.45.2
|
