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
|
/*
* Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include <stdarg.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/ossl_typ.h>
#include "internal/nelem.h"
#include "internal/evp_int.h"
#include "evp_locl.h"
EVP_MAC_CTX *EVP_MAC_CTX_new_id(int id)
{
const EVP_MAC *mac = EVP_get_macbynid(id);
if (mac == NULL)
return NULL;
return EVP_MAC_CTX_new(mac);
}
EVP_MAC_CTX *EVP_MAC_CTX_new(const EVP_MAC *mac)
{
EVP_MAC_CTX *ctx = OPENSSL_zalloc(sizeof(EVP_MAC_CTX));
if (ctx == NULL || (ctx->data = mac->new()) == NULL) {
EVPerr(EVP_F_EVP_MAC_CTX_NEW, ERR_R_MALLOC_FAILURE);
OPENSSL_free(ctx);
ctx = NULL;
} else {
ctx->meth = mac;
}
return ctx;
}
void EVP_MAC_CTX_free(EVP_MAC_CTX *ctx)
{
if (ctx != NULL && ctx->data != NULL) {
ctx->meth->free(ctx->data);
ctx->data = NULL;
}
OPENSSL_free(ctx);
}
int EVP_MAC_CTX_copy(EVP_MAC_CTX *dst, EVP_MAC_CTX *src)
{
EVP_MAC_IMPL *macdata;
if (src->data != NULL && !dst->meth->copy(dst->data, src->data))
return 0;
macdata = dst->data;
*dst = *src;
dst->data = macdata;
return 1;
}
const EVP_MAC *EVP_MAC_CTX_mac(EVP_MAC_CTX *ctx)
{
return ctx->meth;
}
size_t EVP_MAC_size(EVP_MAC_CTX *ctx)
{
if (ctx->data != NULL)
return ctx->meth->size(ctx->data);
/* If the MAC hasn't been initialized yet, we return zero */
return 0;
}
int EVP_MAC_init(EVP_MAC_CTX *ctx)
{
return ctx->meth->init(ctx->data);
}
int EVP_MAC_update(EVP_MAC_CTX *ctx, const unsigned char *data, size_t datalen)
{
return ctx->meth->update(ctx->data, data, datalen);
}
int EVP_MAC_final(EVP_MAC_CTX *ctx, unsigned char *out, size_t *poutlen)
{
int l = ctx->meth->size(ctx->data);
if (l < 0)
return 0;
if (poutlen != NULL)
*poutlen = l;
if (out == NULL)
return 1;
return ctx->meth->final(ctx->data, out);
}
int EVP_MAC_ctrl(EVP_MAC_CTX *ctx, int cmd, ...)
{
int ok = -1;
va_list args;
va_start(args, cmd);
ok = EVP_MAC_vctrl(ctx, cmd, args);
va_end(args);
if (ok == -2)
EVPerr(EVP_F_EVP_MAC_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
return ok;
}
int EVP_MAC_vctrl(EVP_MAC_CTX *ctx, int cmd, va_list args)
{
int ok = 1;
if (ctx == NULL || ctx->meth == NULL)
return -2;
switch (cmd) {
#if 0
case ...:
/* code */
ok = 1;
break;
#endif
default:
if (ctx->meth->ctrl != NULL)
ok = ctx->meth->ctrl(ctx->data, cmd, args);
else
ok = -2;
break;
}
return ok;
}
int EVP_MAC_ctrl_str(EVP_MAC_CTX *ctx, const char *type, const char *value)
{
int ok = 1;
if (ctx == NULL || ctx->meth == NULL || ctx->meth->ctrl_str == NULL) {
EVPerr(EVP_F_EVP_MAC_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
return -2;
}
ok = ctx->meth->ctrl_str(ctx->data, type, value);
if (ok == -2)
EVPerr(EVP_F_EVP_MAC_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
return ok;
}
int EVP_MAC_str2ctrl(EVP_MAC_CTX *ctx, int cmd, const char *value)
{
size_t len;
len = strlen(value);
if (len > INT_MAX)
return -1;
return EVP_MAC_ctrl(ctx, cmd, value, len);
}
int EVP_MAC_hex2ctrl(EVP_MAC_CTX *ctx, int cmd, const char *hex)
{
unsigned char *bin;
long binlen;
int rv = -1;
bin = OPENSSL_hexstr2buf(hex, &binlen);
if (bin == NULL)
return 0;
if (binlen <= INT_MAX)
rv = EVP_MAC_ctrl(ctx, cmd, bin, (size_t)binlen);
OPENSSL_free(bin);
return rv;
}
int EVP_MAC_nid(const EVP_MAC *mac)
{
return mac->type;
}
|
