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
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifdef FREEBL_NO_DEPEND
#include "stubs.h"
#endif
#include <string.h>
#include <stdio.h>
#include "seccomon.h"
#include "secerr.h"
#include "blapit.h"
#include "blapii.h"
#include "chacha20poly1305.h"
// There are three implementations of ChaCha20Poly1305:
// 1) 128-bit with AVX hardware acceleration used on x64
// 2) 256-bit with AVX2 hardware acceleration used on x64
// 3) 32-bit used on all other platforms
// On x64 when AVX2 and other necessary registers are available,
// the 256bit-verctorized version will be used. When AVX2 features
// are unavailable or disabled but AVX registers are available, the
// 128bit-vectorized version will be used. In all other cases the
// scalar version of the HACL* code will be used.
// Instead of including the headers (they bring other things we don't want),
// we declare the functions here.
// Usage is guarded by runtime checks of required hardware features.
// Forward declaration from Hacl_Chacha20_Vec128.h and Hacl_Chacha20Poly1305_128.h.
extern void Hacl_Chacha20_Vec128_chacha20_encrypt_128(uint32_t len, uint8_t *out,
uint8_t *text, uint8_t *key,
uint8_t *n1, uint32_t ctr);
extern void
Hacl_Chacha20Poly1305_128_aead_encrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
extern uint32_t
Hacl_Chacha20Poly1305_128_aead_decrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
// Forward declaration from Hacl_Chacha20_Vec256.h and Hacl_Chacha20Poly1305_256.h.
extern void Hacl_Chacha20_Vec256_chacha20_encrypt_256(uint32_t len, uint8_t *out,
uint8_t *text, uint8_t *key,
uint8_t *n1, uint32_t ctr);
extern void
Hacl_Chacha20Poly1305_256_aead_encrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
extern uint32_t
Hacl_Chacha20Poly1305_256_aead_decrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
// Forward declaration from Hacl_Chacha20.h and Hacl_Chacha20Poly1305_32.h.
extern void Hacl_Chacha20_chacha20_encrypt(uint32_t len, uint8_t *out,
uint8_t *text, uint8_t *key,
uint8_t *n1, uint32_t ctr);
extern void
Hacl_Chacha20Poly1305_32_aead_encrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
extern uint32_t
Hacl_Chacha20Poly1305_32_aead_decrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
SECStatus
ChaCha20Poly1305_InitContext(ChaCha20Poly1305Context *ctx,
const unsigned char *key, unsigned int keyLen,
unsigned int tagLen)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
if (keyLen != 32) {
PORT_SetError(SEC_ERROR_BAD_KEY);
return SECFailure;
}
if (tagLen != 16) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
PORT_Memcpy(ctx->key, key, sizeof(ctx->key));
ctx->tagLen = tagLen;
return SECSuccess;
#endif
}
ChaCha20Poly1305Context *
ChaCha20Poly1305_CreateContext(const unsigned char *key, unsigned int keyLen,
unsigned int tagLen)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return NULL;
#else
ChaCha20Poly1305Context *ctx;
ctx = PORT_New(ChaCha20Poly1305Context);
if (ctx == NULL) {
return NULL;
}
if (ChaCha20Poly1305_InitContext(ctx, key, keyLen, tagLen) != SECSuccess) {
PORT_Free(ctx);
ctx = NULL;
}
return ctx;
#endif
}
void
ChaCha20Poly1305_DestroyContext(ChaCha20Poly1305Context *ctx, PRBool freeit)
{
#ifndef NSS_DISABLE_CHACHAPOLY
PORT_Memset(ctx, 0, sizeof(*ctx));
if (freeit) {
PORT_Free(ctx);
}
#endif
}
#ifndef NSS_DISABLE_CHACHAPOLY
void
ChaCha20Xor(uint8_t *output, uint8_t *block, uint32_t len, uint8_t *k,
uint8_t *nonce, uint32_t ctr)
{
#ifdef NSS_X64
if (ssse3_support() && sse4_1_support() && avx_support()) {
#ifdef NSS_DISABLE_AVX2
Hacl_Chacha20_Vec128_chacha20_encrypt_128(len, output, block, k, nonce, ctr);
#else
if (avx2_support()) {
Hacl_Chacha20_Vec256_chacha20_encrypt_256(len, output, block, k, nonce, ctr);
} else {
Hacl_Chacha20_Vec128_chacha20_encrypt_128(len, output, block, k, nonce, ctr);
}
#endif
} else
#endif
{
Hacl_Chacha20_chacha20_encrypt(len, output, block, k, nonce, ctr);
}
}
#endif /* NSS_DISABLE_CHACHAPOLY */
SECStatus
ChaCha20_Xor(unsigned char *output, const unsigned char *block, unsigned int len,
const unsigned char *k, const unsigned char *nonce, PRUint32 ctr)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
// ChaCha has a 64 octet block, with a 32-bit block counter.
if (sizeof(len) > 4 && len >= (1ULL << (6 + 32))) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
ChaCha20Xor(output, (uint8_t *)block, len, (uint8_t *)k,
(uint8_t *)nonce, ctr);
return SECSuccess;
#endif
}
SECStatus
ChaCha20Poly1305_Seal(const ChaCha20Poly1305Context *ctx, unsigned char *output,
unsigned int *outputLen, unsigned int maxOutputLen,
const unsigned char *input, unsigned int inputLen,
const unsigned char *nonce, unsigned int nonceLen,
const unsigned char *ad, unsigned int adLen)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
if (nonceLen != 12) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
// ChaCha has a 64 octet block, with a 32-bit block counter.
if (sizeof(inputLen) > 4 && inputLen >= (1ULL << (6 + 32))) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
if (maxOutputLen < inputLen + ctx->tagLen) {
PORT_SetError(SEC_ERROR_OUTPUT_LEN);
return SECFailure;
}
#ifdef NSS_X64
if (ssse3_support() && sse4_1_support() && avx_support()) {
#ifdef NSS_DISABLE_AVX2
Hacl_Chacha20Poly1305_128_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, output + inputLen);
#else
if (avx2_support()) {
Hacl_Chacha20Poly1305_256_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, output + inputLen);
} else {
Hacl_Chacha20Poly1305_128_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, output + inputLen);
}
#endif
} else
#endif
{
Hacl_Chacha20Poly1305_32_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, output + inputLen);
}
*outputLen = inputLen + ctx->tagLen;
return SECSuccess;
#endif
}
SECStatus
ChaCha20Poly1305_Open(const ChaCha20Poly1305Context *ctx, unsigned char *output,
unsigned int *outputLen, unsigned int maxOutputLen,
const unsigned char *input, unsigned int inputLen,
const unsigned char *nonce, unsigned int nonceLen,
const unsigned char *ad, unsigned int adLen)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
unsigned int ciphertextLen;
if (nonceLen != 12) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
if (inputLen < ctx->tagLen) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
ciphertextLen = inputLen - ctx->tagLen;
if (maxOutputLen < ciphertextLen) {
PORT_SetError(SEC_ERROR_OUTPUT_LEN);
return SECFailure;
}
// ChaCha has a 64 octet block, with a 32-bit block counter.
if (inputLen >= (1ULL << (6 + 32)) + ctx->tagLen) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
uint32_t res = 1;
#ifdef NSS_X64
if (ssse3_support() && sse4_1_support() && avx_support()) {
#ifdef NSS_DISABLE_AVX2
res = Hacl_Chacha20Poly1305_128_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)input + ciphertextLen);
#else
if (avx2_support()) {
res = Hacl_Chacha20Poly1305_256_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)input + ciphertextLen);
} else {
res = Hacl_Chacha20Poly1305_128_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)input + ciphertextLen);
}
#endif
} else
#endif
{
res = Hacl_Chacha20Poly1305_32_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)input + ciphertextLen);
}
if (res) {
PORT_SetError(SEC_ERROR_BAD_DATA);
return SECFailure;
}
*outputLen = ciphertextLen;
return SECSuccess;
#endif
}
SECStatus
ChaCha20Poly1305_Encrypt(const ChaCha20Poly1305Context *ctx,
unsigned char *output, unsigned int *outputLen,
unsigned int maxOutputLen, const unsigned char *input,
unsigned int inputLen, const unsigned char *nonce,
unsigned int nonceLen, const unsigned char *ad,
unsigned int adLen, unsigned char *outTag)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
if (nonceLen != 12) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
// ChaCha has a 64 octet block, with a 32-bit block counter.
if (sizeof(inputLen) > 4 && inputLen >= (1ULL << (6 + 32))) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
if (maxOutputLen < inputLen) {
PORT_SetError(SEC_ERROR_OUTPUT_LEN);
return SECFailure;
}
#ifdef NSS_X64
if (ssse3_support() && sse4_1_support() && avx_support()) {
Hacl_Chacha20Poly1305_128_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, outTag);
} else
#endif
{
Hacl_Chacha20Poly1305_32_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, outTag);
}
*outputLen = inputLen;
return SECSuccess;
#endif
}
SECStatus
ChaCha20Poly1305_Decrypt(const ChaCha20Poly1305Context *ctx,
unsigned char *output, unsigned int *outputLen,
unsigned int maxOutputLen, const unsigned char *input,
unsigned int inputLen, const unsigned char *nonce,
unsigned int nonceLen, const unsigned char *ad,
unsigned int adLen, const unsigned char *tagIn)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
unsigned int ciphertextLen;
if (nonceLen != 12) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
ciphertextLen = inputLen;
if (maxOutputLen < ciphertextLen) {
PORT_SetError(SEC_ERROR_OUTPUT_LEN);
return SECFailure;
}
// ChaCha has a 64 octet block, with a 32-bit block counter.
if (sizeof(inputLen) > 4 && inputLen >= (1ULL << (6 + 32))) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
uint32_t res = 1;
#ifdef NSS_X64
if (ssse3_support() && sse4_1_support() && avx_support()) {
res = Hacl_Chacha20Poly1305_128_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)tagIn);
} else
#endif
{
res = Hacl_Chacha20Poly1305_32_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)tagIn);
}
if (res) {
PORT_SetError(SEC_ERROR_BAD_DATA);
return SECFailure;
}
*outputLen = ciphertextLen;
return SECSuccess;
#endif
}
|
