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
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
|
/*
* Argon2 source code package
*
* Written by Daniel Dinu and Dmitry Khovratovich, 2015
*
* This work is licensed under a Creative Commons CC0 1.0 License/Waiver.
*
* You should have received a copy of the CC0 Public Domain Dedication along
* with
* this software. If not, see
* <http://creativecommons.org/publicdomain/zero/1.0/>.
*/
#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "randombytes.h"
#include "utils.h"
#include "argon2-core.h"
#include "argon2-encoding.h"
#include "argon2.h"
int
argon2_ctx(argon2_context *context, argon2_type type)
{
/* 1. Validate all inputs */
int result = argon2_validate_inputs(context);
uint32_t memory_blocks, segment_length;
uint32_t pass;
argon2_instance_t instance;
if (ARGON2_OK != result) {
return result;
}
if (type != Argon2_id && type != Argon2_i) {
return ARGON2_INCORRECT_TYPE;
}
/* 2. Align memory size */
/* Minimum memory_blocks = 8L blocks, where L is the number of lanes */
memory_blocks = context->m_cost;
if (memory_blocks < 2 * ARGON2_SYNC_POINTS * context->lanes) {
memory_blocks = 2 * ARGON2_SYNC_POINTS * context->lanes;
}
segment_length = memory_blocks / (context->lanes * ARGON2_SYNC_POINTS);
/* Ensure that all segments have equal length */
memory_blocks = segment_length * (context->lanes * ARGON2_SYNC_POINTS);
instance.region = NULL;
instance.passes = context->t_cost;
instance.current_pass = ~ 0U;
instance.memory_blocks = memory_blocks;
instance.segment_length = segment_length;
instance.lane_length = segment_length * ARGON2_SYNC_POINTS;
instance.lanes = context->lanes;
instance.threads = context->threads;
instance.type = type;
/* 3. Initialization: Hashing inputs, allocating memory, filling first
* blocks
*/
result = argon2_initialize(&instance, context);
if (ARGON2_OK != result) {
return result;
}
/* 4. Filling memory */
for (pass = 0; pass < instance.passes; pass++) {
argon2_fill_memory_blocks(&instance, pass);
}
/* 5. Finalization */
argon2_finalize(context, &instance);
return ARGON2_OK;
}
int
argon2_hash(const uint32_t t_cost, const uint32_t m_cost,
const uint32_t parallelism, const void *pwd, const size_t pwdlen,
const void *salt, const size_t saltlen, void *hash,
const size_t hashlen, char *encoded, const size_t encodedlen,
argon2_type type)
{
argon2_context context;
int result;
uint8_t *out;
if (hash != NULL) {
randombytes_buf(hash, hashlen);
}
if (pwdlen > ARGON2_MAX_PWD_LENGTH) {
return ARGON2_PWD_TOO_LONG;
}
if (hashlen > ARGON2_MAX_OUTLEN) {
return ARGON2_OUTPUT_TOO_LONG;
}
if (saltlen > ARGON2_MAX_SALT_LENGTH) {
return ARGON2_SALT_TOO_LONG;
}
out = (uint8_t *) malloc(hashlen);
if (!out) {
return ARGON2_MEMORY_ALLOCATION_ERROR;
}
context.out = (uint8_t *) out;
context.outlen = (uint32_t) hashlen;
context.pwd = (uint8_t *) pwd;
context.pwdlen = (uint32_t) pwdlen;
context.salt = (uint8_t *) salt;
context.saltlen = (uint32_t) saltlen;
context.secret = NULL;
context.secretlen = 0;
context.ad = NULL;
context.adlen = 0;
context.t_cost = t_cost;
context.m_cost = m_cost;
context.lanes = parallelism;
context.threads = parallelism;
context.flags = ARGON2_DEFAULT_FLAGS;
result = argon2_ctx(&context, type);
if (result != ARGON2_OK) {
sodium_memzero(out, hashlen);
free(out);
return result;
}
/* if encoding requested, write it */
if (encoded && encodedlen) {
if (argon2_encode_string(encoded, encodedlen,
&context, type) != ARGON2_OK) {
sodium_memzero(out, hashlen);
sodium_memzero(encoded, encodedlen);
free(out);
return ARGON2_ENCODING_FAIL;
}
}
/* if raw hash requested, write it */
if (hash) {
memcpy(hash, out, hashlen);
}
sodium_memzero(out, hashlen);
free(out);
return ARGON2_OK;
}
int
argon2i_hash_encoded(const uint32_t t_cost, const uint32_t m_cost,
const uint32_t parallelism, const void *pwd,
const size_t pwdlen, const void *salt,
const size_t saltlen, const size_t hashlen, char *encoded,
const size_t encodedlen)
{
return argon2_hash(t_cost, m_cost, parallelism, pwd, pwdlen, salt, saltlen,
NULL, hashlen, encoded, encodedlen, Argon2_i);
}
int
argon2i_hash_raw(const uint32_t t_cost, const uint32_t m_cost,
const uint32_t parallelism, const void *pwd,
const size_t pwdlen, const void *salt, const size_t saltlen,
void *hash, const size_t hashlen)
{
return argon2_hash(t_cost, m_cost, parallelism, pwd, pwdlen, salt, saltlen,
hash, hashlen, NULL, 0, Argon2_i);
}
int
argon2id_hash_encoded(const uint32_t t_cost, const uint32_t m_cost,
const uint32_t parallelism, const void *pwd,
const size_t pwdlen, const void *salt,
const size_t saltlen, const size_t hashlen, char *encoded,
const size_t encodedlen)
{
return argon2_hash(t_cost, m_cost, parallelism, pwd, pwdlen, salt, saltlen,
NULL, hashlen, encoded, encodedlen, Argon2_id);
}
int
argon2id_hash_raw(const uint32_t t_cost, const uint32_t m_cost,
const uint32_t parallelism, const void *pwd,
const size_t pwdlen, const void *salt, const size_t saltlen,
void *hash, const size_t hashlen)
{
return argon2_hash(t_cost, m_cost, parallelism, pwd, pwdlen, salt, saltlen,
hash, hashlen, NULL, 0, Argon2_id);
}
int
argon2_verify(const char *encoded, const void *pwd, const size_t pwdlen,
argon2_type type)
{
argon2_context ctx;
uint8_t *out;
int decode_result;
int ret;
size_t encoded_len;
memset(&ctx, 0, sizeof ctx);
ctx.pwd = NULL;
ctx.pwdlen = 0;
ctx.secret = NULL;
ctx.secretlen = 0;
/* max values, to be updated in argon2_decode_string */
encoded_len = strlen(encoded);
if (encoded_len > UINT32_MAX) {
return ARGON2_DECODING_LENGTH_FAIL;
}
ctx.adlen = (uint32_t) encoded_len;
ctx.saltlen = (uint32_t) encoded_len;
ctx.outlen = (uint32_t) encoded_len;
ctx.ad = (uint8_t *) malloc(ctx.adlen);
ctx.salt = (uint8_t *) malloc(ctx.saltlen);
ctx.out = (uint8_t *) malloc(ctx.outlen);
if (!ctx.out || !ctx.salt || !ctx.ad) {
free(ctx.ad);
free(ctx.salt);
free(ctx.out);
return ARGON2_MEMORY_ALLOCATION_ERROR;
}
out = (uint8_t *) malloc(ctx.outlen);
if (!out) {
free(ctx.ad);
free(ctx.salt);
free(ctx.out);
return ARGON2_MEMORY_ALLOCATION_ERROR;
}
decode_result = argon2_decode_string(&ctx, encoded, type);
if (decode_result != ARGON2_OK) {
free(ctx.ad);
free(ctx.salt);
free(ctx.out);
free(out);
return decode_result;
}
ret = argon2_hash(ctx.t_cost, ctx.m_cost, ctx.threads, pwd, pwdlen,
ctx.salt, ctx.saltlen, out, ctx.outlen, NULL, 0, type);
free(ctx.ad);
free(ctx.salt);
if (ret == ARGON2_OK && sodium_memcmp(out, ctx.out, ctx.outlen) != 0) {
ret = ARGON2_VERIFY_MISMATCH;
}
free(out);
free(ctx.out);
return ret;
}
int
argon2i_verify(const char *encoded, const void *pwd, const size_t pwdlen)
{
return argon2_verify(encoded, pwd, pwdlen, Argon2_i);
}
int
argon2id_verify(const char *encoded, const void *pwd, const size_t pwdlen)
{
return argon2_verify(encoded, pwd, pwdlen, Argon2_id);
}
|
