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194e93f2 MW |
1 | /* -*-c-*- |
2 | * | |
3 | * Salsa20 stream cipher | |
4 | * | |
5 | * (c) 2015 Straylight/Edgeware | |
6 | */ | |
7 | ||
0a847b11 MW |
8 | /*----- Licensing notice --------------------------------------------------* |
9 | * | |
10 | * This file is part of Catacomb. | |
11 | * | |
12 | * Catacomb is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU Library General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of the | |
15 | * License, or (at your option) any later version. | |
16 | * | |
17 | * Catacomb is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU Library General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU Library General Public | |
23 | * License along with Catacomb; if not, write to the Free | |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
25 | * MA 02111-1307, USA. | |
26 | */ | |
27 | ||
194e93f2 MW |
28 | /*----- Header files ------------------------------------------------------*/ |
29 | ||
e10e6494 MW |
30 | #include "config.h" |
31 | ||
194e93f2 MW |
32 | #include <stdarg.h> |
33 | ||
34 | #include <mLib/bits.h> | |
35 | ||
36 | #include "arena.h" | |
e10e6494 | 37 | #include "dispatch.h" |
194e93f2 MW |
38 | #include "gcipher.h" |
39 | #include "grand.h" | |
40 | #include "keysz.h" | |
41 | #include "paranoia.h" | |
6a0eb244 | 42 | #include "rsvr.h" |
194e93f2 MW |
43 | #include "salsa20.h" |
44 | #include "salsa20-core.h" | |
45 | ||
46 | /*----- Global variables --------------------------------------------------*/ | |
47 | ||
48 | const octet salsa20_keysz[] = { KSZ_SET, 32, 16, 10, 0 }; | |
49 | ||
50 | /*----- The Salsa20 core function and utilities ---------------------------*/ | |
51 | ||
52 | /* --- @core@ --- * | |
53 | * | |
54 | * Arguments: @unsigned r@ = number of rounds | |
55 | * @const salsa20_matrix src@ = input matrix | |
56 | * @salsa20_matrix dest@ = where to put the output | |
57 | * | |
58 | * Returns: --- | |
59 | * | |
60 | * | |
61 | * Use: Apply the Salsa20/r core function to @src@, writing the | |
62 | * result to @dest@. This consists of @r@ rounds followed by | |
63 | * the feedforward step. | |
64 | */ | |
65 | ||
8a1aa284 MW |
66 | CPU_DISPATCH(static, (void), void, core, |
67 | (unsigned r, const salsa20_matrix src, salsa20_matrix dest), | |
68 | (r, src, dest), pick_core, simple_core); | |
e10e6494 MW |
69 | |
70 | static void simple_core(unsigned r, const salsa20_matrix src, | |
71 | salsa20_matrix dest) | |
194e93f2 MW |
72 | { SALSA20_nR(dest, src, r); SALSA20_FFWD(dest, src); } |
73 | ||
0f23f75f MW |
74 | #if CPUFAM_X86 || CPUFAM_AMD64 |
75 | extern core__functype salsa20_core_x86ish_sse2; | |
b9b279b4 | 76 | extern core__functype salsa20_core_x86ish_avx; |
e10e6494 MW |
77 | #endif |
78 | ||
704d59c8 MW |
79 | #if CPUFAM_ARMEL |
80 | extern core__functype salsa20_core_arm_neon; | |
81 | #endif | |
82 | ||
e492db88 MW |
83 | #if CPUFAM_ARM64 |
84 | extern core__functype salsa20_core_arm64; | |
85 | #endif | |
86 | ||
e10e6494 MW |
87 | static core__functype *pick_core(void) |
88 | { | |
0f23f75f | 89 | #if CPUFAM_X86 || CPUFAM_AMD64 |
b9b279b4 MW |
90 | DISPATCH_PICK_COND(salsa20_core, salsa20_core_x86ish_avx, |
91 | cpu_feature_p(CPUFEAT_X86_AVX)); | |
0f23f75f | 92 | DISPATCH_PICK_COND(salsa20_core, salsa20_core_x86ish_sse2, |
fac645f7 | 93 | cpu_feature_p(CPUFEAT_X86_SSE2)); |
e10e6494 | 94 | #endif |
704d59c8 MW |
95 | #if CPUFAM_ARMEL |
96 | DISPATCH_PICK_COND(salsa20_core, salsa20_core_arm_neon, | |
97 | cpu_feature_p(CPUFEAT_ARM_NEON)); | |
98 | #endif | |
e492db88 MW |
99 | #if CPUFAM_ARM64 |
100 | DISPATCH_PICK_COND(salsa20_core, salsa20_core_arm64, 1); | |
101 | #endif | |
fac645f7 | 102 | DISPATCH_PICK_FALLBACK(salsa20_core, simple_core); |
e10e6494 MW |
103 | } |
104 | ||
194e93f2 MW |
105 | /* --- @populate@ --- * |
106 | * | |
107 | * Arguments: @salsa20_matrix a@ = a matrix to fill in | |
108 | * @const void *key@ = pointer to key material | |
109 | * @size_t ksz@ = size of key | |
110 | * | |
111 | * Returns: --- | |
112 | * | |
113 | * Use: Fills in a Salsa20 matrix from the key, setting the | |
114 | * appropriate constants according to the key length. The nonce | |
115 | * and position words are left uninitialized. | |
116 | */ | |
117 | ||
118 | static void populate(salsa20_matrix a, const void *key, size_t ksz) | |
119 | { | |
120 | const octet *k = key; | |
121 | ||
122 | KSZ_ASSERT(salsa20, ksz); | |
123 | ||
a4c2e267 MW |
124 | /* Here's the pattern of key, constant, nonce, and counter pieces in the |
125 | * matrix, before and after our permutation. | |
126 | * | |
127 | * [ C0 K0 K1 K2 ] [ C0 C1 C2 C3 ] | |
128 | * [ K3 C1 N0 N1 ] --> [ K3 T1 K7 K2 ] | |
129 | * [ T0 T1 C2 K4 ] [ T0 K6 K1 N1 ] | |
130 | * [ K5 K6 K7 C3 ] [ K5 K0 N0 K4 ] | |
131 | */ | |
132 | ||
133 | a[13] = LOAD32_L(k + 0); | |
134 | a[10] = LOAD32_L(k + 4); | |
194e93f2 | 135 | if (ksz == 10) { |
a4c2e267 | 136 | a[ 7] = LOAD16_L(k + 8); |
194e93f2 MW |
137 | a[ 4] = 0; |
138 | } else { | |
a4c2e267 | 139 | a[ 7] = LOAD32_L(k + 8); |
194e93f2 MW |
140 | a[ 4] = LOAD32_L(k + 12); |
141 | } | |
142 | if (ksz <= 16) { | |
a4c2e267 MW |
143 | a[15] = a[13]; |
144 | a[12] = a[10]; | |
145 | a[ 9] = a[ 7]; | |
146 | a[ 6] = a[ 4]; | |
194e93f2 | 147 | a[ 0] = SALSA20_A128; |
a4c2e267 MW |
148 | a[ 1] = SALSA20_B128; |
149 | a[ 2] = ksz == 10 ? SALSA20_C80 : SALSA20_C128; | |
150 | a[ 3] = SALSA20_D128; | |
194e93f2 | 151 | } else { |
a4c2e267 | 152 | a[15] = LOAD32_L(k + 16); |
194e93f2 | 153 | a[12] = LOAD32_L(k + 20); |
a4c2e267 MW |
154 | a[ 9] = LOAD32_L(k + 24); |
155 | a[ 6] = LOAD32_L(k + 28); | |
194e93f2 | 156 | a[ 0] = SALSA20_A256; |
a4c2e267 MW |
157 | a[ 1] = SALSA20_B256; |
158 | a[ 2] = SALSA20_C256; | |
159 | a[ 3] = SALSA20_D256; | |
194e93f2 MW |
160 | } |
161 | } | |
162 | ||
163 | /*----- Salsa20 implementation --------------------------------------------*/ | |
164 | ||
bfff260d MW |
165 | static const octet zerononce[XSALSA20_NONCESZ]; |
166 | ||
194e93f2 MW |
167 | /* --- @salsa20_init@ --- * |
168 | * | |
169 | * Arguments: @salsa20_ctx *ctx@ = context to fill in | |
170 | * @const void *key@ = pointer to key material | |
171 | * @size_t ksz@ = size of key (either 32 or 16) | |
172 | * @const void *nonce@ = initial nonce, or null | |
173 | * | |
174 | * Returns: --- | |
175 | * | |
176 | * Use: Initializes a Salsa20 context ready for use. | |
177 | */ | |
178 | ||
179 | void salsa20_init(salsa20_ctx *ctx, const void *key, size_t ksz, | |
180 | const void *nonce) | |
181 | { | |
194e93f2 MW |
182 | populate(ctx->a, key, ksz); |
183 | salsa20_setnonce(ctx, nonce ? nonce : zerononce); | |
184 | } | |
185 | ||
1778ca95 | 186 | /* --- @salsa20_setnonce{,_ietf}@ --- * |
194e93f2 MW |
187 | * |
188 | * Arguments: @salsa20_ctx *ctx@ = pointer to context | |
1778ca95 MW |
189 | * @const void *nonce@ = the nonce (@SALSA20_NONCESZ@ or |
190 | * @SALSA20_IETF_NONCESZ@ bytes) | |
194e93f2 MW |
191 | * |
192 | * Returns: --- | |
193 | * | |
194 | * Use: Set a new nonce in the context @ctx@, e.g., for processing a | |
195 | * different message. The stream position is reset to zero (see | |
196 | * @salsa20_seek@ etc.). | |
197 | */ | |
198 | ||
199 | void salsa20_setnonce(salsa20_ctx *ctx, const void *nonce) | |
200 | { | |
201 | const octet *n = nonce; | |
202 | ||
a4c2e267 MW |
203 | ctx->a[14] = LOAD32_L(n + 0); |
204 | ctx->a[11] = LOAD32_L(n + 4); | |
194e93f2 MW |
205 | salsa20_seek(ctx, 0); |
206 | } | |
207 | ||
1778ca95 MW |
208 | void salsa20_setnonce_ietf(salsa20_ctx *ctx, const void *nonce) |
209 | { | |
210 | const octet *n = nonce; | |
211 | ||
212 | ctx->a[ 5] = LOAD32_L(n + 0); | |
213 | ctx->a[14] = LOAD32_L(n + 4); | |
214 | ctx->a[11] = LOAD32_L(n + 8); | |
215 | salsa20_seek_ietf(ctx, 0); | |
216 | } | |
217 | ||
218 | /* --- @salsa20_seek{,u64,_ietf}@ --- * | |
194e93f2 MW |
219 | * |
220 | * Arguments: @salsa20_ctx *ctx@ = pointer to context | |
1778ca95 | 221 | * @unsigned long i@, @kludge64 i@, @uint32@ = new position |
194e93f2 MW |
222 | * |
223 | * Returns: --- | |
224 | * | |
225 | * Use: Sets a new stream position, in units of Salsa20 output | |
226 | * blocks, which are @SALSA20_OUTSZ@ bytes each. Byte | |
227 | * granularity can be achieved by calling @salsa20R_encrypt@ | |
228 | * appropriately. | |
229 | */ | |
230 | ||
231 | void salsa20_seek(salsa20_ctx *ctx, unsigned long i) | |
232 | { kludge64 ii; ASSIGN64(ii, i); salsa20_seeku64(ctx, ii); } | |
233 | ||
234 | void salsa20_seeku64(salsa20_ctx *ctx, kludge64 i) | |
235 | { | |
a4c2e267 | 236 | ctx->a[8] = LO64(i); ctx->a[5] = HI64(i); |
6a0eb244 | 237 | ctx->off = 0; |
194e93f2 MW |
238 | } |
239 | ||
1778ca95 MW |
240 | void salsa20_seek_ietf(salsa20_ctx *ctx, uint32 i) |
241 | { ctx->a[8] = i; } | |
242 | ||
243 | /* --- @salsa20_tell{,u64,_ietf}@ --- * | |
194e93f2 MW |
244 | * |
245 | * Arguments: @salsa20_ctx *ctx@ = pointer to context | |
246 | * | |
247 | * Returns: The current position in the output stream, in blocks, | |
248 | * rounding upwards. | |
249 | */ | |
250 | ||
251 | unsigned long salsa20_tell(salsa20_ctx *ctx) | |
252 | { kludge64 i = salsa20_tellu64(ctx); return (GET64(unsigned long, i)); } | |
253 | ||
254 | kludge64 salsa20_tellu64(salsa20_ctx *ctx) | |
a4c2e267 | 255 | { kludge64 i; SET64(i, ctx->a[5], ctx->a[8]); return (i); } |
194e93f2 | 256 | |
1778ca95 MW |
257 | uint32 salsa20_tell_ietf(salsa20_ctx *ctx) |
258 | { return (ctx->a[5]); } | |
259 | ||
194e93f2 MW |
260 | /* --- @salsa20{,12,8}_encrypt@ --- * |
261 | * | |
262 | * Arguments: @salsa20_ctx *ctx@ = pointer to context | |
263 | * @const void *src@ = source buffer (or null) | |
264 | * @void *dest@ = destination buffer (or null) | |
265 | * @size_t sz@ = size of the buffers | |
266 | * | |
267 | * Returns: --- | |
268 | * | |
269 | * Use: Encrypts or decrypts @sz@ bytes of data from @src@ to @dest@. | |
270 | * Salsa20 works by XORing plaintext with a keystream, so | |
271 | * encryption and decryption are the same operation. If @dest@ | |
272 | * is null then ignore @src@ and skip @sz@ bytes of the | |
273 | * keystream. If @src@ is null, then just write the keystream | |
274 | * to @dest@. | |
275 | */ | |
276 | ||
6a0eb244 MW |
277 | static const rsvr_policy policy = { 0, SALSA20_OUTSZ, SALSA20_OUTSZ }; |
278 | ||
194e93f2 MW |
279 | #define SALSA20_ENCRYPT(r, ctx, src, dest, sz) \ |
280 | SALSA20_DECOR(salsa20, r, _encrypt)(ctx, src, dest, sz) | |
281 | #define DEFENCRYPT(r) \ | |
282 | void SALSA20_ENCRYPT(r, salsa20_ctx *ctx, const void *src, \ | |
283 | void *dest, size_t sz) \ | |
284 | { \ | |
285 | salsa20_matrix b; \ | |
286 | const octet *s = src; \ | |
287 | octet *d = dest; \ | |
6a0eb244 | 288 | rsvr_plan plan; \ |
194e93f2 MW |
289 | kludge64 pos, delta; \ |
290 | \ | |
6a0eb244 | 291 | rsvr_mkplan(&plan, &policy, ctx->off, sz); \ |
194e93f2 | 292 | \ |
6a0eb244 MW |
293 | if (plan.head) { \ |
294 | if (!ctx->off) { \ | |
295 | core(r, ctx->a, b); SALSA20_STEP(ctx->a); \ | |
296 | SALSA20_PREPBUF(ctx, b); \ | |
194e93f2 | 297 | } \ |
6a0eb244 MW |
298 | SALSA20_OUTBUF(ctx, d, s, plan.head); \ |
299 | } \ | |
300 | \ | |
301 | ctx->off -= plan.from_rsvr; \ | |
302 | \ | |
303 | if (!d) { \ | |
304 | if (plan.from_input) { \ | |
305 | pos = salsa20_tellu64(ctx); \ | |
306 | ASSIGN64(delta, plan.from_input/SALSA20_OUTSZ); \ | |
307 | ADD64(pos, pos, delta); \ | |
308 | salsa20_seeku64(ctx, pos); \ | |
194e93f2 | 309 | } \ |
6a0eb244 MW |
310 | } else if (!s) while (plan.from_input) { \ |
311 | core(r, ctx->a, b); SALSA20_STEP(ctx->a); \ | |
312 | SALSA20_GENFULL(b, d); plan.from_input -= SALSA20_OUTSZ; \ | |
313 | } else while (plan.from_input) { \ | |
314 | core(r, ctx->a, b); SALSA20_STEP(ctx->a); \ | |
315 | SALSA20_MIXFULL(b, d, s); plan.from_input -= SALSA20_OUTSZ; \ | |
194e93f2 MW |
316 | } \ |
317 | \ | |
6a0eb244 MW |
318 | if (plan.tail) { \ |
319 | core(r, ctx->a, b); SALSA20_STEP(ctx->a); \ | |
194e93f2 | 320 | SALSA20_PREPBUF(ctx, b); \ |
6a0eb244 | 321 | SALSA20_OUTBUF(ctx, d, s, plan.tail); \ |
194e93f2 MW |
322 | } \ |
323 | } | |
324 | SALSA20_VARS(DEFENCRYPT) | |
325 | ||
326 | /*----- HSalsa20 implementation -------------------------------------------*/ | |
327 | ||
328 | #define HSALSA20_RAW(r, ctx, src, dest) \ | |
329 | SALSA20_DECOR(hsalsa20, r, _raw)(ctx, src, dest) | |
330 | #define HSALSA20_PRF(r, ctx, src, dest) \ | |
331 | SALSA20_DECOR(hsalsa20, r, _prf)(ctx, src, dest) | |
332 | ||
333 | /* --- @hsalsa20{,12,8}_prf@ --- * | |
334 | * | |
335 | * Arguments: @salsa20_ctx *ctx@ = pointer to context | |
336 | * @const void *src@ = the input (@HSALSA20_INSZ@ bytes) | |
337 | * @void *dest@ = the output (@HSALSA20_OUTSZ@ bytes) | |
338 | * | |
339 | * Returns: --- | |
340 | * | |
341 | * Use: Apply the HSalsa20/r pseudorandom function to @src@, writing | |
342 | * the result to @out@. | |
343 | */ | |
344 | ||
345 | #define DEFHSALSA20(r) \ | |
346 | static void HSALSA20_RAW(r, salsa20_matrix k, \ | |
347 | const uint32 *src, uint32 *dest) \ | |
348 | { \ | |
349 | salsa20_matrix a; \ | |
350 | int i; \ | |
351 | \ | |
352 | /* --- HSalsa20, computed from full Salsa20 --- * \ | |
353 | * \ | |
354 | * The security proof makes use of the fact that HSalsa20 (i.e., \ | |
355 | * without the final feedforward step) can be computed from full \ | |
356 | * Salsa20 using only knowledge of the non-secret input. I don't \ | |
357 | * want to compromise the performance of the main function by \ | |
358 | * making the feedforward step separate, but this operation is less \ | |
359 | * speed critical, so we do it the harder way. \ | |
360 | */ \ | |
361 | \ | |
a4c2e267 | 362 | for (i = 0; i < 4; i++) k[14 - 3*i] = src[i]; \ |
194e93f2 | 363 | core(r, k, a); \ |
a4c2e267 MW |
364 | for (i = 0; i < 4; i++) dest[i] = a[5*i] - k[i]; \ |
365 | for (i = 4; i < 8; i++) dest[i] = a[i + 2] - k[26 - 3*i]; \ | |
194e93f2 MW |
366 | } \ |
367 | \ | |
368 | void HSALSA20_PRF(r, salsa20_ctx *ctx, const void *src, void *dest) \ | |
369 | { \ | |
370 | const octet *s = src; \ | |
371 | octet *d = dest; \ | |
372 | uint32 in[4], out[8]; \ | |
373 | int i; \ | |
374 | \ | |
375 | for (i = 0; i < 4; i++) in[i] = LOAD32_L(s + 4*i); \ | |
376 | HSALSA20_RAW(r, ctx->a, in, out); \ | |
377 | for (i = 0; i < 8; i++) STORE32_L(d + 4*i, out[i]); \ | |
378 | } | |
379 | SALSA20_VARS(DEFHSALSA20) | |
380 | ||
381 | /*----- XSalsa20 implementation -------------------------------------------*/ | |
382 | ||
383 | /* --- Some convenient macros for naming functions --- * | |
384 | * | |
385 | * Because the crypto core is involved in XSalsa20/r's per-nonce setup, we | |
386 | * need to take an interest in the number of rounds in most of the various | |
387 | * functions, and it will probably help if we distinguish the context | |
388 | * structures for the various versions. | |
389 | */ | |
390 | ||
391 | #define XSALSA20_CTX(r) SALSA20_DECOR(xsalsa20, r, _ctx) | |
392 | #define XSALSA20_INIT(r, ctx, k, ksz, n) \ | |
393 | SALSA20_DECOR(xsalsa20, r, _init)(ctx, k, ksz, n) | |
394 | #define XSALSA20_SETNONCE(r, ctx, n) \ | |
395 | SALSA20_DECOR(xsalsa20, r, _setnonce)(ctx, n) | |
396 | #define XSALSA20_SEEK(r, ctx, i) \ | |
397 | SALSA20_DECOR(xsalsa20, r, _seek)(ctx, i) | |
398 | #define XSALSA20_SEEKU64(r, ctx, i) \ | |
399 | SALSA20_DECOR(xsalsa20, r, _seeku64)(ctx, i) | |
400 | #define XSALSA20_TELL(r, ctx) \ | |
401 | SALSA20_DECOR(xsalsa20, r, _tell)(ctx) | |
402 | #define XSALSA20_TELLU64(r, ctx) \ | |
403 | SALSA20_DECOR(xsalsa20, r, _tellu64)(ctx) | |
404 | #define XSALSA20_ENCRYPT(r, ctx, src, dest, sz) \ | |
405 | SALSA20_DECOR(xsalsa20, r, _encrypt)(ctx, src, dest, sz) | |
406 | ||
407 | /* --- @xsalsa20{,12,8}_init@ --- * | |
408 | * | |
409 | * Arguments: @xsalsa20R_ctx *ctx@ = the context to fill in | |
410 | * @const void *key@ = pointer to key material | |
411 | * @size_t ksz@ = size of key (either 32 or 16) | |
412 | * @const void *nonce@ = initial nonce, or null | |
413 | * | |
414 | * Returns: --- | |
415 | * | |
416 | * Use: Initializes an XSalsa20/r context ready for use. | |
417 | * | |
418 | * There is a different function for each number of rounds, | |
419 | * unlike for plain Salsa20. | |
420 | */ | |
421 | ||
422 | #define DEFXINIT(r) \ | |
423 | void XSALSA20_INIT(r, XSALSA20_CTX(r) *ctx, \ | |
424 | const void *key, size_t ksz, const void *nonce) \ | |
425 | { \ | |
194e93f2 MW |
426 | populate(ctx->k, key, ksz); \ |
427 | ctx->s.a[ 0] = SALSA20_A256; \ | |
a4c2e267 MW |
428 | ctx->s.a[ 1] = SALSA20_B256; \ |
429 | ctx->s.a[ 2] = SALSA20_C256; \ | |
430 | ctx->s.a[ 3] = SALSA20_D256; \ | |
194e93f2 MW |
431 | XSALSA20_SETNONCE(r, ctx, nonce ? nonce : zerononce); \ |
432 | } | |
433 | SALSA20_VARS(DEFXINIT) | |
434 | ||
435 | /* --- @xsalsa20{,12,8}_setnonce@ --- * | |
436 | * | |
437 | * Arguments: @xsalsa20R_ctx *ctx@ = pointer to context | |
438 | * @const void *nonce@ = the nonce (@XSALSA20_NONCESZ@ bytes) | |
439 | * | |
440 | * Returns: --- | |
441 | * | |
442 | * Use: Set a new nonce in the context @ctx@, e.g., for processing a | |
443 | * different message. The stream position is reset to zero (see | |
444 | * @salsa20_seek@ etc.). | |
445 | * | |
446 | * There is a different function for each number of rounds, | |
447 | * unlike for plain Salsa20. | |
448 | */ | |
449 | ||
450 | #define DEFXNONCE(r) \ | |
451 | void XSALSA20_SETNONCE(r, XSALSA20_CTX(r) *ctx, const void *nonce) \ | |
452 | { \ | |
453 | const octet *n = nonce; \ | |
454 | uint32 in[4], out[8]; \ | |
455 | int i; \ | |
456 | \ | |
457 | for (i = 0; i < 4; i++) in[i] = LOAD32_L(n + 4*i); \ | |
458 | HSALSA20_RAW(r, ctx->k, in, out); \ | |
a4c2e267 MW |
459 | for (i = 0; i < 4; i++) ctx->s.a[13 - 3*i] = out[i]; \ |
460 | for (i = 4; i < 8; i++) ctx->s.a[27 - 3*i] = out[i]; \ | |
194e93f2 MW |
461 | salsa20_setnonce(&ctx->s, n + 16); \ |
462 | } | |
463 | SALSA20_VARS(DEFXNONCE) | |
464 | ||
d022e630 | 465 | /* --- @xsalsa20{,12,8}_seek{,u64}@ --- * |
194e93f2 MW |
466 | * |
467 | * Arguments: @xsalsa20R_ctx *ctx@ = pointer to context | |
468 | * @unsigned long i@, @kludge64 i@ = new position to set | |
469 | * | |
470 | * Returns: --- | |
471 | * | |
472 | * Use: Sets a new stream position, in units of Salsa20 output | |
473 | * blocks, which are @XSALSA20_OUTSZ@ bytes each. Byte | |
474 | * granularity can be achieved by calling @xsalsa20R_encrypt@ | |
475 | * appropriately. | |
476 | * | |
477 | * There is a different function for each number of rounds, | |
478 | * unlike for plain Salsa20, because the context structures are | |
479 | * different. | |
480 | */ | |
481 | ||
d022e630 | 482 | /* --- @xsalsa20{,12,8}_tell{,u64}@ --- * |
194e93f2 MW |
483 | * |
484 | * Arguments: @salsa20_ctx *ctx@ = pointer to context | |
485 | * | |
486 | * Returns: The current position in the output stream, in blocks, | |
487 | * rounding upwards. | |
488 | * | |
489 | * There is a different function for each number of rounds, | |
490 | * unlike for plain Salsa20, because the context structures are | |
491 | * different. | |
492 | */ | |
493 | ||
494 | /* --- @xsalsa20{,12,8}_encrypt@ --- * | |
495 | * | |
496 | * Arguments: @xsalsa20R_ctx *ctx@ = pointer to context | |
497 | * @const void *src@ = source buffer (or null) | |
498 | * @void *dest@ = destination buffer (or null) | |
499 | * @size_t sz@ = size of the buffers | |
500 | * | |
501 | * Returns: --- | |
502 | * | |
503 | * Use: Encrypts or decrypts @sz@ bytes of data from @src@ to @dest@. | |
504 | * XSalsa20 works by XORing plaintext with a keystream, so | |
505 | * encryption and decryption are the same operation. If @dest@ | |
506 | * is null then ignore @src@ and skip @sz@ bytes of the | |
507 | * keystream. If @src@ is null, then just write the keystream | |
508 | * to @dest@. | |
509 | */ | |
510 | ||
511 | #define DEFXPASSTHRU(r) \ | |
512 | void XSALSA20_SEEK(r, XSALSA20_CTX(r) *ctx, unsigned long i) \ | |
513 | { salsa20_seek(&ctx->s, i); } \ | |
514 | void XSALSA20_SEEKU64(r, XSALSA20_CTX(r) *ctx, kludge64 i) \ | |
515 | { salsa20_seeku64(&ctx->s, i); } \ | |
516 | unsigned long XSALSA20_TELL(r, XSALSA20_CTX(r) *ctx) \ | |
517 | { return salsa20_tell(&ctx->s); } \ | |
518 | kludge64 XSALSA20_TELLU64(r, XSALSA20_CTX(r) *ctx) \ | |
519 | { return salsa20_tellu64(&ctx->s); } \ | |
520 | void XSALSA20_ENCRYPT(r, XSALSA20_CTX(r) *ctx, \ | |
521 | const void *src, void *dest, size_t sz) \ | |
522 | { SALSA20_ENCRYPT(r, &ctx->s, src, dest, sz); } | |
523 | SALSA20_VARS(DEFXPASSTHRU) | |
524 | ||
525 | /*----- Generic cipher interface ------------------------------------------*/ | |
526 | ||
527 | typedef struct gctx { gcipher c; salsa20_ctx ctx; } gctx; | |
528 | ||
529 | static void gsetiv(gcipher *c, const void *iv) | |
530 | { gctx *g = (gctx *)c; salsa20_setnonce(&g->ctx, iv); } | |
531 | ||
1778ca95 MW |
532 | static void gsetiv_ietf(gcipher *c, const void *iv) |
533 | { gctx *g = (gctx *)c; salsa20_setnonce_ietf(&g->ctx, iv); } | |
534 | ||
194e93f2 MW |
535 | static void gdestroy(gcipher *c) |
536 | { gctx *g = (gctx *)c; BURN(*g); S_DESTROY(g); } | |
537 | ||
d9ce319f MW |
538 | static gcipher *ginit(const void *k, size_t sz, const gcipher_ops *ops) |
539 | { | |
540 | gctx *g = S_CREATE(gctx); | |
541 | g->c.ops = ops; | |
542 | salsa20_init(&g->ctx, k, sz, 0); | |
543 | return (&g->c); | |
544 | } | |
545 | ||
194e93f2 MW |
546 | #define DEFGCIPHER(r) \ |
547 | \ | |
1778ca95 | 548 | static const gcipher_ops gops_##r, gops_##r##_ietf; \ |
194e93f2 MW |
549 | \ |
550 | static gcipher *ginit_##r(const void *k, size_t sz) \ | |
d9ce319f | 551 | { return (ginit(k, sz, &gops_##r)); } \ |
194e93f2 | 552 | \ |
1778ca95 MW |
553 | static gcipher *ginit_##r##_ietf(const void *k, size_t sz) \ |
554 | { return (ginit(k, sz, &gops_##r##_ietf)); } \ | |
555 | \ | |
194e93f2 MW |
556 | static void gencrypt_##r(gcipher *c, const void *s, \ |
557 | void *t, size_t sz) \ | |
558 | { gctx *g = (gctx *)c; SALSA20_ENCRYPT(r, &g->ctx, s, t, sz); } \ | |
559 | \ | |
560 | static const gcipher_ops gops_##r = { \ | |
561 | &SALSA20_DECOR(salsa20, r, ), \ | |
562 | gencrypt_##r, gencrypt_##r, gdestroy, gsetiv, 0 \ | |
563 | }; \ | |
564 | \ | |
1778ca95 MW |
565 | static const gcipher_ops gops_##r##_ietf = { \ |
566 | &SALSA20_DECOR(salsa20, r, _ietf), \ | |
567 | gencrypt_##r, gencrypt_##r, gdestroy, gsetiv_ietf, 0 \ | |
568 | }; \ | |
569 | \ | |
194e93f2 MW |
570 | const gccipher SALSA20_DECOR(salsa20, r, ) = { \ |
571 | SALSA20_NAME_##r, salsa20_keysz, \ | |
572 | SALSA20_NONCESZ, ginit_##r \ | |
1778ca95 MW |
573 | }; \ |
574 | \ | |
575 | const gccipher SALSA20_DECOR(salsa20, r, _ietf) = { \ | |
576 | SALSA20_NAME_##r "-ietf", salsa20_keysz, \ | |
577 | SALSA20_IETF_NONCESZ, ginit_##r##_ietf \ | |
194e93f2 MW |
578 | }; |
579 | ||
580 | SALSA20_VARS(DEFGCIPHER) | |
581 | ||
582 | #define DEFGXCIPHER(r) \ | |
583 | \ | |
584 | typedef struct { gcipher c; XSALSA20_CTX(r) ctx; } gxctx_##r; \ | |
585 | \ | |
586 | static void gxsetiv_##r(gcipher *c, const void *iv) \ | |
587 | { gxctx_##r *g = (gxctx_##r *)c; XSALSA20_SETNONCE(r, &g->ctx, iv); } \ | |
588 | \ | |
589 | static void gxdestroy_##r(gcipher *c) \ | |
590 | { gxctx_##r *g = (gxctx_##r *)c; BURN(*g); S_DESTROY(g); } \ | |
591 | \ | |
592 | static const gcipher_ops gxops_##r; \ | |
593 | \ | |
594 | static gcipher *gxinit_##r(const void *k, size_t sz) \ | |
595 | { \ | |
596 | gxctx_##r *g = S_CREATE(gxctx_##r); \ | |
597 | g->c.ops = &gxops_##r; \ | |
598 | XSALSA20_INIT(r, &g->ctx, k, sz, 0); \ | |
599 | return (&g->c); \ | |
600 | } \ | |
601 | \ | |
602 | static void gxencrypt_##r(gcipher *c, const void *s, \ | |
603 | void *t, size_t sz) \ | |
604 | { \ | |
605 | gxctx_##r *g = (gxctx_##r *)c; \ | |
606 | XSALSA20_ENCRYPT(r, &g->ctx, s, t, sz); \ | |
607 | } \ | |
608 | \ | |
609 | static const gcipher_ops gxops_##r = { \ | |
610 | &SALSA20_DECOR(xsalsa20, r, ), \ | |
611 | gxencrypt_##r, gxencrypt_##r, gxdestroy_##r, gxsetiv_##r, 0 \ | |
612 | }; \ | |
613 | \ | |
614 | const gccipher SALSA20_DECOR(xsalsa20, r, ) = { \ | |
615 | "x" SALSA20_NAME_##r, salsa20_keysz, \ | |
616 | XSALSA20_NONCESZ, gxinit_##r \ | |
617 | }; | |
618 | ||
619 | SALSA20_VARS(DEFGXCIPHER) | |
620 | ||
621 | /*----- Generic random number generator interface -------------------------*/ | |
622 | ||
623 | typedef struct grops { | |
624 | size_t noncesz; | |
625 | void (*seek)(void *, kludge64); | |
626 | kludge64 (*tell)(void *); | |
627 | void (*setnonce)(void *, const void *); | |
628 | void (*generate)(void *, void *, size_t); | |
629 | } grops; | |
630 | ||
631 | typedef struct grbasectx { | |
632 | grand r; | |
633 | const grops *ops; | |
634 | } grbasectx; | |
635 | ||
636 | static int grmisc(grand *r, unsigned op, ...) | |
637 | { | |
638 | octet buf[XSALSA20_NONCESZ]; | |
639 | grbasectx *g = (grbasectx *)r; | |
640 | grand *rr; | |
641 | const octet *p; | |
642 | size_t sz; | |
643 | uint32 i; | |
644 | unsigned long ul; | |
645 | kludge64 pos; | |
646 | va_list ap; | |
647 | int rc = 0; | |
648 | ||
649 | va_start(ap, op); | |
650 | ||
651 | switch (op) { | |
652 | case GRAND_CHECK: | |
653 | switch (va_arg(ap, unsigned)) { | |
654 | case GRAND_CHECK: | |
655 | case GRAND_SEEDINT: | |
656 | case GRAND_SEEDUINT32: | |
657 | case GRAND_SEEDBLOCK: | |
658 | case GRAND_SEEDRAND: | |
659 | case SALSA20_SEEK: | |
660 | case SALSA20_SEEKU64: | |
661 | case SALSA20_TELL: | |
662 | case SALSA20_TELLU64: | |
663 | rc = 1; | |
664 | break; | |
665 | default: | |
666 | rc = 0; | |
667 | break; | |
668 | } | |
669 | break; | |
670 | ||
671 | case GRAND_SEEDINT: | |
672 | i = va_arg(ap, unsigned); STORE32_L(buf, i); | |
673 | memset(buf + 4, 0, g->ops->noncesz - 4); | |
674 | g->ops->setnonce(g, buf); | |
675 | break; | |
676 | case GRAND_SEEDUINT32: | |
677 | i = va_arg(ap, uint32); STORE32_L(buf, i); | |
678 | memset(buf + 4, 0, g->ops->noncesz - 4); | |
679 | g->ops->setnonce(g, buf); | |
680 | break; | |
681 | case GRAND_SEEDBLOCK: | |
682 | p = va_arg(ap, const void *); | |
683 | sz = va_arg(ap, size_t); | |
684 | if (sz < g->ops->noncesz) { | |
685 | memcpy(buf, p, sz); | |
686 | memset(buf + sz, 0, g->ops->noncesz - sz); | |
687 | p = buf; | |
688 | } | |
689 | g->ops->setnonce(g, p); | |
690 | break; | |
691 | case GRAND_SEEDRAND: | |
692 | rr = va_arg(ap, grand *); | |
693 | rr->ops->fill(rr, buf, g->ops->noncesz); | |
694 | g->ops->setnonce(g, buf); | |
695 | break; | |
696 | case SALSA20_SEEK: | |
697 | ul = va_arg(ap, unsigned long); ASSIGN64(pos, ul); | |
698 | g->ops->seek(g, pos); | |
699 | break; | |
700 | case SALSA20_SEEKU64: | |
701 | pos = va_arg(ap, kludge64); | |
702 | g->ops->seek(g, pos); | |
703 | break; | |
704 | case SALSA20_TELL: | |
705 | pos = g->ops->tell(g); | |
706 | *va_arg(ap, unsigned long *) = GET64(unsigned long, pos); | |
707 | break; | |
708 | case SALSA20_TELLU64: | |
709 | *va_arg(ap, kludge64 *) = g->ops->tell(g); | |
710 | break; | |
711 | default: | |
712 | GRAND_BADOP; | |
713 | break; | |
714 | } | |
715 | ||
716 | return (rc); | |
717 | } | |
718 | ||
719 | static octet grbyte(grand *r) | |
720 | { | |
721 | grbasectx *g = (grbasectx *)r; | |
722 | octet o; | |
723 | g->ops->generate(g, &o, 1); | |
724 | return (o); | |
725 | } | |
726 | ||
727 | static uint32 grword(grand *r) | |
728 | { | |
729 | grbasectx *g = (grbasectx *)r; | |
730 | octet b[4]; | |
731 | g->ops->generate(g, b, sizeof(b)); | |
732 | return (LOAD32_L(b)); | |
733 | } | |
734 | ||
735 | static void grfill(grand *r, void *p, size_t sz) | |
736 | { | |
737 | grbasectx *g = (grbasectx *)r; | |
738 | g->ops->generate(r, p, sz); | |
739 | } | |
740 | ||
741 | typedef struct grctx { | |
742 | grbasectx r; | |
743 | salsa20_ctx ctx; | |
744 | } grctx; | |
745 | ||
746 | static void gr_seek(void *r, kludge64 pos) | |
747 | { grctx *g = r; salsa20_seeku64(&g->ctx, pos); } | |
748 | ||
1778ca95 MW |
749 | static void gr_seek_ietf(void *r, kludge64 pos) |
750 | { grctx *g = r; salsa20_seek_ietf(&g->ctx, LO64(pos)); } | |
751 | ||
194e93f2 MW |
752 | static kludge64 gr_tell(void *r) |
753 | { grctx *g = r; return (salsa20_tellu64(&g->ctx)); } | |
754 | ||
1778ca95 MW |
755 | static kludge64 gr_tell_ietf(void *r) |
756 | { | |
757 | grctx *g = r; | |
758 | kludge64 pos; | |
759 | ||
760 | SET64(pos, 0, salsa20_tell_ietf(&g->ctx)); | |
761 | return (pos); | |
762 | } | |
763 | ||
194e93f2 MW |
764 | static void gr_setnonce(void *r, const void *n) |
765 | { grctx *g = r; salsa20_setnonce(&g->ctx, n); } | |
766 | ||
1778ca95 MW |
767 | static void gr_setnonce_ietf(void *r, const void *n) |
768 | { grctx *g = r; salsa20_setnonce(&g->ctx, n); } | |
769 | ||
194e93f2 MW |
770 | static void grdestroy(grand *r) |
771 | { grctx *g = (grctx *)r; BURN(*g); S_DESTROY(g); } | |
772 | ||
d9ce319f MW |
773 | static grand *grinit(const void *k, size_t ksz, const void *n, |
774 | const grand_ops *ops, const grops *myops) | |
775 | { | |
776 | grctx *g = S_CREATE(grctx); | |
777 | g->r.r.ops = ops; | |
778 | g->r.ops = myops; | |
779 | salsa20_init(&g->ctx, k, ksz, 0); | |
c2603631 | 780 | if (n) myops->setnonce(g, n); |
d9ce319f MW |
781 | return (&g->r.r); |
782 | } | |
783 | ||
194e93f2 MW |
784 | #define DEFGRAND(rr) \ |
785 | \ | |
786 | static void gr_generate_##rr(void *r, void *b, size_t sz) \ | |
787 | { grctx *g = r; SALSA20_ENCRYPT(rr, &g->ctx, 0, b, sz); } \ | |
788 | \ | |
789 | static const grops grops_##rr = \ | |
790 | { SALSA20_NONCESZ, gr_seek, gr_tell, \ | |
791 | gr_setnonce, gr_generate_##rr }; \ | |
792 | \ | |
1778ca95 MW |
793 | static const grops grops_##rr##_ietf = \ |
794 | { SALSA20_IETF_NONCESZ, gr_seek_ietf, gr_tell_ietf, \ | |
795 | gr_setnonce_ietf, gr_generate_##rr }; \ | |
796 | \ | |
194e93f2 MW |
797 | static const grand_ops grops_rand_##rr = { \ |
798 | SALSA20_NAME_##rr, GRAND_CRYPTO, 0, \ | |
799 | grmisc, grdestroy, grword, \ | |
44ff6c11 | 800 | grbyte, grword, grand_defaultrange, grfill \ |
194e93f2 MW |
801 | }; \ |
802 | \ | |
1778ca95 MW |
803 | static const grand_ops grops_rand_##rr##_ietf = { \ |
804 | SALSA20_NAME_##rr "-ietf", GRAND_CRYPTO, 0, \ | |
805 | grmisc, grdestroy, grword, \ | |
806 | grbyte, grword, grand_defaultrange, grfill \ | |
807 | }; \ | |
808 | \ | |
194e93f2 MW |
809 | grand *SALSA20_DECOR(salsa20, rr, _rand) \ |
810 | (const void *k, size_t ksz, const void *n) \ | |
1778ca95 MW |
811 | { return (grinit(k, ksz, n, &grops_rand_##rr, &grops_##rr)); } \ |
812 | \ | |
813 | grand *SALSA20_DECOR(salsa20, rr, _ietf_rand) \ | |
814 | (const void *k, size_t ksz, const void *n) \ | |
815 | { \ | |
816 | return (grinit(k, ksz, n, \ | |
817 | &grops_rand_##rr##_ietf, \ | |
818 | &grops_##rr##_ietf)); \ | |
819 | } | |
820 | ||
194e93f2 MW |
821 | SALSA20_VARS(DEFGRAND) |
822 | ||
823 | #define DEFXGRAND(rr) \ | |
824 | \ | |
825 | typedef struct grxctx_##rr { \ | |
826 | grbasectx r; \ | |
827 | XSALSA20_CTX(rr) ctx; \ | |
828 | } grxctx_##rr; \ | |
829 | \ | |
830 | static void grx_seek_##rr(void *r, kludge64 pos) \ | |
831 | { grxctx_##rr *g = r; XSALSA20_SEEKU64(rr, &g->ctx, pos); } \ | |
832 | \ | |
833 | static kludge64 grx_tell_##rr(void *r) \ | |
834 | { grxctx_##rr *g = r; return (XSALSA20_TELLU64(rr, &g->ctx)); } \ | |
835 | \ | |
836 | static void grx_setnonce_##rr(void *r, const void *n) \ | |
837 | { grxctx_##rr *g = r; XSALSA20_SETNONCE(rr, &g->ctx, n); } \ | |
838 | \ | |
839 | static void grxdestroy_##rr(grand *r) \ | |
840 | { grxctx_##rr *g = (grxctx_##rr *)r; BURN(*g); S_DESTROY(g); } \ | |
841 | \ | |
842 | static void grx_generate_##rr(void *r, void *b, size_t sz) \ | |
843 | { grxctx_##rr *g = r; XSALSA20_ENCRYPT(rr, &g->ctx, 0, b, sz); } \ | |
844 | \ | |
845 | static const grops grxops_##rr = \ | |
846 | { XSALSA20_NONCESZ, grx_seek_##rr, grx_tell_##rr, \ | |
847 | grx_setnonce_##rr, grx_generate_##rr }; \ | |
848 | \ | |
849 | static const grand_ops grxops_rand_##rr = { \ | |
850 | "x" SALSA20_NAME_##rr, GRAND_CRYPTO, 0, \ | |
851 | grmisc, grxdestroy_##rr, grword, \ | |
44ff6c11 | 852 | grbyte, grword, grand_defaultrange, grfill \ |
194e93f2 MW |
853 | }; \ |
854 | \ | |
855 | grand *SALSA20_DECOR(xsalsa20, rr, _rand) \ | |
856 | (const void *k, size_t ksz, const void *n) \ | |
857 | { \ | |
f9fe9910 | 858 | grxctx_##rr *g = S_CREATE(grxctx_##rr); \ |
194e93f2 MW |
859 | g->r.r.ops = &grxops_rand_##rr; \ |
860 | g->r.ops = &grxops_##rr; \ | |
861 | XSALSA20_INIT(rr, &g->ctx, k, ksz, n); \ | |
862 | return (&g->r.r); \ | |
863 | } | |
864 | SALSA20_VARS(DEFXGRAND) | |
865 | ||
866 | /*----- Test rig ----------------------------------------------------------*/ | |
867 | ||
868 | #ifdef TEST_RIG | |
869 | ||
870 | #include <stdio.h> | |
871 | #include <string.h> | |
872 | ||
873 | #include <mLib/quis.h> | |
874 | #include <mLib/testrig.h> | |
875 | ||
a4c2e267 MW |
876 | static const int perm[] = { |
877 | 0, 13, 10, 7, | |
878 | 4, 1, 14, 11, | |
879 | 8, 5, 2, 15, | |
880 | 12, 9, 6, 3 | |
881 | }; | |
882 | ||
194e93f2 MW |
883 | #define DEFVCORE(r) \ |
884 | static int v_core_##r(dstr *v) \ | |
885 | { \ | |
886 | salsa20_matrix a, b; \ | |
887 | dstr d = DSTR_INIT; \ | |
a4c2e267 | 888 | int i, j, n; \ |
194e93f2 MW |
889 | int ok = 1; \ |
890 | \ | |
891 | DENSURE(&d, SALSA20_OUTSZ); d.len = SALSA20_OUTSZ; \ | |
892 | n = *(int *)v[0].buf; \ | |
893 | for (i = 0; i < SALSA20_OUTSZ/4; i++) \ | |
a4c2e267 | 894 | b[i] = LOAD32_L(v[1].buf + 4*i); \ |
194e93f2 | 895 | for (i = 0; i < n; i++) { \ |
a4c2e267 | 896 | for (j = 0; j < 16; j++) a[perm[j]] = b[j]; \ |
194e93f2 MW |
897 | core(r, a, b); \ |
898 | memcpy(a, b, sizeof(a)); \ | |
899 | } \ | |
a4c2e267 | 900 | for (i = 0; i < SALSA20_OUTSZ/4; i++) STORE32_L(d.buf + 4*i, b[i]); \ |
194e93f2 MW |
901 | \ |
902 | if (d.len != v[2].len || memcmp(d.buf, v[2].buf, v[2].len) != 0) { \ | |
903 | ok = 0; \ | |
904 | printf("\nfail core:" \ | |
905 | "\n\titerations = %d" \ | |
906 | "\n\tin = ", n); \ | |
907 | type_hex.dump(&v[1], stdout); \ | |
908 | printf("\n\texpected = "); \ | |
909 | type_hex.dump(&v[2], stdout); \ | |
910 | printf("\n\tcalculated = "); \ | |
911 | type_hex.dump(&d, stdout); \ | |
912 | putchar('\n'); \ | |
913 | } \ | |
914 | \ | |
915 | dstr_destroy(&d); \ | |
916 | return (ok); \ | |
917 | } | |
918 | SALSA20_VARS(DEFVCORE) | |
919 | ||
920 | #define SALSA20_CTX(r) salsa20_ctx | |
e6912e44 MW |
921 | |
922 | #define SALSA20_TESTSETUP(r, ctx, k, ksz, n, nsz, p, psz) do { \ | |
923 | kludge64 pos64; \ | |
924 | salsa20_init(ctx, k, ksz, 0); \ | |
925 | if (nsz == 8) salsa20_setnonce(ctx, n); \ | |
1778ca95 | 926 | else if (nsz == 12) salsa20_setnonce_ietf(ctx, n); \ |
e6912e44 | 927 | if (psz == 8) { LOAD64_(pos64, p); salsa20_seeku64(ctx, pos64); } \ |
1778ca95 | 928 | else if (psz == 4) salsa20_seek_ietf(ctx, LOAD32(p)); \ |
e6912e44 MW |
929 | } while (0) |
930 | ||
931 | #define XSALSA20_TESTSETUP(r, ctx, k, ksz, n, nsz, p, psz) do { \ | |
932 | kludge64 pos64; \ | |
933 | XSALSA20_INIT(r, ctx, k, ksz, 0); \ | |
934 | if (nsz == 24) XSALSA20_SETNONCE(r, ctx, n); \ | |
935 | if (psz == 8) { LOAD64_(pos64, p); XSALSA20_SEEKU64(r, ctx, pos64); } \ | |
936 | } while (0) | |
194e93f2 MW |
937 | |
938 | #define DEFxVENC(base, BASE, r) \ | |
939 | static int v_encrypt_##base##_##r(dstr *v) \ | |
940 | { \ | |
941 | BASE##_CTX(r) ctx; \ | |
942 | dstr d = DSTR_INIT; \ | |
194e93f2 MW |
943 | const octet *p, *p0; \ |
944 | octet *q; \ | |
945 | size_t sz, sz0, step; \ | |
946 | unsigned long skip; \ | |
947 | int ok = 1; \ | |
948 | \ | |
949 | if (v[4].len) { p0 = (const octet *)v[4].buf; sz0 = v[4].len; } \ | |
950 | else { p0 = 0; sz0 = v[5].len; } \ | |
951 | DENSURE(&d, sz0); d.len = sz0; \ | |
952 | skip = *(unsigned long *)v[3].buf; \ | |
953 | \ | |
954 | step = 0; \ | |
955 | while (step < sz0 + skip) { \ | |
956 | step = step ? 3*step + 4 : 1; \ | |
957 | if (step > sz0 + skip) step = sz0 + skip; \ | |
e6912e44 MW |
958 | BASE##_TESTSETUP(r, &ctx, v[0].buf, v[0].len, \ |
959 | v[1].buf, v[1].len, v[2].buf, v[2].len); \ | |
194e93f2 MW |
960 | \ |
961 | for (sz = skip; sz >= step; sz -= step) \ | |
962 | BASE##_ENCRYPT(r, &ctx, 0, 0, step); \ | |
963 | if (sz) BASE##_ENCRYPT(r, &ctx, 0, 0, sz); \ | |
964 | for (p = p0, q = (octet *)d.buf, sz = sz0; \ | |
965 | sz >= step; \ | |
966 | sz -= step, q += step) { \ | |
967 | BASE##_ENCRYPT(r, &ctx, p, q, step); \ | |
968 | if (p) p += step; \ | |
969 | } \ | |
970 | if (sz) BASE##_ENCRYPT(r, &ctx, p, q, sz); \ | |
971 | \ | |
972 | if (d.len != v[5].len || memcmp(d.buf, v[5].buf, v[5].len) != 0) { \ | |
973 | ok = 0; \ | |
974 | printf("\nfail encrypt:" \ | |
975 | "\n\tstep = %lu" \ | |
976 | "\n\tkey = ", (unsigned long)step); \ | |
977 | type_hex.dump(&v[0], stdout); \ | |
978 | printf("\n\tnonce = "); \ | |
979 | type_hex.dump(&v[1], stdout); \ | |
980 | printf("\n\tposition = "); \ | |
981 | type_hex.dump(&v[2], stdout); \ | |
982 | printf("\n\tskip = %lu", skip); \ | |
983 | printf("\n\tmessage = "); \ | |
984 | type_hex.dump(&v[4], stdout); \ | |
985 | printf("\n\texpected = "); \ | |
986 | type_hex.dump(&v[5], stdout); \ | |
987 | printf("\n\tcalculated = "); \ | |
988 | type_hex.dump(&d, stdout); \ | |
989 | putchar('\n'); \ | |
990 | } \ | |
991 | } \ | |
992 | \ | |
993 | dstr_destroy(&d); \ | |
994 | return (ok); \ | |
995 | } | |
996 | #define DEFVENC(r) DEFxVENC(salsa20, SALSA20, r) | |
997 | #define DEFXVENC(r) DEFxVENC(xsalsa20, XSALSA20, r) | |
998 | SALSA20_VARS(DEFVENC) | |
999 | SALSA20_VARS(DEFXVENC) | |
1000 | ||
1001 | static test_chunk defs[] = { | |
1002 | #define DEFxTAB(pre, base, r) \ | |
1003 | { pre SALSA20_NAME_##r, v_encrypt_##base##_##r, \ | |
1004 | { &type_hex, &type_hex, &type_hex, &type_ulong, \ | |
1005 | &type_hex, &type_hex, 0 } }, | |
1006 | #define DEFTAB(r) \ | |
1007 | { SALSA20_NAME_##r "-core", v_core_##r, \ | |
1008 | { &type_int, &type_hex, &type_hex, 0 } }, \ | |
1009 | DEFxTAB("", salsa20, r) | |
1010 | #define DEFXTAB(r) DEFxTAB("x", xsalsa20, r) | |
1011 | SALSA20_VARS(DEFTAB) | |
1012 | SALSA20_VARS(DEFXTAB) | |
1013 | { 0, 0, { 0 } } | |
1014 | }; | |
1015 | ||
1016 | int main(int argc, char *argv[]) | |
1017 | { | |
1018 | test_run(argc, argv, defs, SRCDIR"/t/salsa20"); | |
1019 | return (0); | |
1020 | } | |
1021 | ||
1022 | #endif | |
1023 | ||
1024 | /*----- That's all, folks -------------------------------------------------*/ |