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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
#include <efi.h>
#include <efilib.h>
#include <Library/BaseCryptLib.h>
#include <openssl/sha.h>
#include <openssl/md5.h>
#include "PasswordCrypt.h"
UINT16 get_hash_size (const UINT16 method)
{
switch (method) {
case TRANDITIONAL_DES:
return 64 / 8; /* per "man crypt" */
case EXTEND_BSDI_DES:
return 64 / 8; /* per "man crypt" */
case MD5_BASED:
return MD5_DIGEST_LENGTH;
case SHA256_BASED:
return SHA256_DIGEST_LENGTH;
case SHA512_BASED:
return SHA512_DIGEST_LENGTH;
case BLOWFISH_BASED:
return 184 / 8; /* per "man crypt" */
}
return 0;
}
static EFI_STATUS sha256_crypt (const char *key, UINT32 key_len,
const char *salt, UINT32 salt_size,
const UINT32 rounds, UINT8 *hash)
{
SHA256_CTX ctx, alt_ctx;
UINT8 alt_result[SHA256_DIGEST_SIZE];
UINT8 tmp_result[SHA256_DIGEST_SIZE];
UINT8 *cp, *p_bytes, *s_bytes;
UINTN cnt;
SHA256_Init(&ctx);
SHA256_Update(&ctx, key, key_len);
SHA256_Update(&ctx, salt, salt_size);
SHA256_Init(&alt_ctx);
SHA256_Update(&alt_ctx, key, key_len);
SHA256_Update(&alt_ctx, salt, salt_size);
SHA256_Update(&alt_ctx, key, key_len);
SHA256_Final(alt_result, &alt_ctx);
for (cnt = key_len; cnt > 32; cnt -= 32)
SHA256_Update(&ctx, alt_result, 32);
SHA256_Update(&ctx, alt_result, cnt);
for (cnt = key_len; cnt > 0; cnt >>= 1) {
if ((cnt & 1) != 0) {
SHA256_Update(&ctx, alt_result, 32);
} else {
SHA256_Update(&ctx, key, key_len);
}
}
SHA256_Final(alt_result, &ctx);
SHA256_Init(&alt_ctx);
for (cnt = 0; cnt < key_len; ++cnt)
SHA256_Update(&alt_ctx, key, key_len);
SHA256_Final(tmp_result, &alt_ctx);
cp = p_bytes = AllocatePool(key_len);
for (cnt = key_len; cnt >= 32; cnt -= 32) {
CopyMem(cp, tmp_result, 32);
cp += 32;
}
CopyMem(cp, tmp_result, cnt);
SHA256_Init(&alt_ctx);
for (cnt = 0; cnt < 16 + alt_result[0]; ++cnt)
SHA256_Update(&alt_ctx, salt, salt_size);
SHA256_Final(tmp_result, &alt_ctx);
cp = s_bytes = AllocatePool(salt_size);
for (cnt = salt_size; cnt >= 32; cnt -= 32) {
CopyMem(cp, tmp_result, 32);
cp += 32;
}
CopyMem(cp, tmp_result, cnt);
for (cnt = 0; cnt < rounds; ++cnt) {
SHA256_Init(&ctx);
if ((cnt & 1) != 0)
SHA256_Update(&ctx, p_bytes, key_len);
else
SHA256_Update(&ctx, alt_result, 32);
if (cnt % 3 != 0)
SHA256_Update(&ctx, s_bytes, salt_size);
if (cnt % 7 != 0)
SHA256_Update(&ctx, p_bytes, key_len);
if ((cnt & 1) != 0)
SHA256_Update(&ctx, alt_result, 32);
else
SHA256_Update(&ctx, p_bytes, key_len);
SHA256_Final(alt_result, &ctx);
}
CopyMem(hash, alt_result, SHA256_DIGEST_SIZE);
FreePool(p_bytes);
FreePool(s_bytes);
return EFI_SUCCESS;
}
static EFI_STATUS sha512_crypt (const char *key, UINT32 key_len,
const char *salt, UINT32 salt_size,
const UINT32 rounds, UINT8 *hash)
{
SHA512_CTX ctx, alt_ctx;
UINT8 alt_result[SHA512_DIGEST_LENGTH];
UINT8 tmp_result[SHA512_DIGEST_LENGTH];
UINT8 *cp, *p_bytes, *s_bytes;
UINTN cnt;
SHA512_Init(&ctx);
SHA512_Update(&ctx, key, key_len);
SHA512_Update(&ctx, salt, salt_size);
SHA512_Init(&alt_ctx);
SHA512_Update(&alt_ctx, key, key_len);
SHA512_Update(&alt_ctx, salt, salt_size);
SHA512_Update(&alt_ctx, key, key_len);
SHA512_Final(alt_result, &alt_ctx);
for (cnt = key_len; cnt > 64; cnt -= 64)
SHA512_Update(&ctx, alt_result, 64);
SHA512_Update(&ctx, alt_result, cnt);
for (cnt = key_len; cnt > 0; cnt >>= 1) {
if ((cnt & 1) != 0) {
SHA512_Update(&ctx, alt_result, 64);
} else {
SHA512_Update(&ctx, key, key_len);
}
}
SHA512_Final(alt_result, &ctx);
SHA512_Init(&alt_ctx);
for (cnt = 0; cnt < key_len; ++cnt)
SHA512_Update(&alt_ctx, key, key_len);
SHA512_Final(tmp_result, &alt_ctx);
cp = p_bytes = AllocatePool(key_len);
for (cnt = key_len; cnt >= 64; cnt -= 64) {
CopyMem(cp, tmp_result, 64);
cp += 64;
}
CopyMem(cp, tmp_result, cnt);
SHA512_Init(&alt_ctx);
for (cnt = 0; cnt < 16 + alt_result[0]; ++cnt)
SHA512_Update(&alt_ctx, salt, salt_size);
SHA512_Final(tmp_result, &alt_ctx);
cp = s_bytes = AllocatePool(salt_size);
for (cnt = salt_size; cnt >= 64; cnt -= 64) {
CopyMem(cp, tmp_result, 64);
cp += 64;
}
CopyMem(cp, tmp_result, cnt);
for (cnt = 0; cnt < rounds; ++cnt) {
SHA512_Init(&ctx);
if ((cnt & 1) != 0)
SHA512_Update(&ctx, p_bytes, key_len);
else
SHA512_Update(&ctx, alt_result, 64);
if (cnt % 3 != 0)
SHA512_Update(&ctx, s_bytes, salt_size);
if (cnt % 7 != 0)
SHA512_Update(&ctx, p_bytes, key_len);
if ((cnt & 1) != 0)
SHA512_Update(&ctx, alt_result, 64);
else
SHA512_Update(&ctx, p_bytes, key_len);
SHA512_Final(alt_result, &ctx);
}
CopyMem(hash, alt_result, SHA512_DIGEST_LENGTH);
FreePool(p_bytes);
FreePool(s_bytes);
return EFI_SUCCESS;
}
EFI_STATUS password_crypt (const char *password, UINT32 pw_length,
const PASSWORD_CRYPT *pw_crypt, UINT8 *hash)
{
EFI_STATUS status;
if (!pw_crypt)
return EFI_INVALID_PARAMETER;
switch (pw_crypt->method) {
case TRANDITIONAL_DES:
case EXTEND_BSDI_DES:
case MD5_BASED:
/* TODO unsupported */
status = EFI_UNSUPPORTED;
break;
case SHA256_BASED:
status = sha256_crypt(password, pw_length, (char *)pw_crypt->salt,
pw_crypt->salt_size, pw_crypt->iter_count,
hash);
break;
case SHA512_BASED:
status = sha512_crypt(password, pw_length, (char *)pw_crypt->salt,
pw_crypt->salt_size, pw_crypt->iter_count,
hash);
break;
case BLOWFISH_BASED:
/* TODO unsupported */
status = EFI_UNSUPPORTED;
break;
default:
return EFI_INVALID_PARAMETER;
}
return status;
}
|
