5 * (c) 2015 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
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.
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.
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,
28 /*----- Header files ------------------------------------------------------*/
34 #include <mLib/bits.h>
38 #include "chacha-core.h"
45 /*----- Global variables --------------------------------------------------*/
47 const octet chacha_keysz
[] = { KSZ_SET
, 32, 16, 10, 0 };
49 /*----- The ChaCha core function and utilities ----------------------------*/
53 * Arguments: @unsigned r@ = number of rounds
54 * @const chacha_matrix src@ = input matrix
55 * @chacha_matrix dest@ = where to put the output
60 * Use: Apply the ChaCha/r core function to @src@, writing the
61 * result to @dest@. This consists of @r@ rounds followed by
62 * the feedforward step.
65 CPU_DISPATCH(static, (void), void, core
,
66 (unsigned r
, const chacha_matrix src
, chacha_matrix dest
),
67 (r
, src
, dest
), pick_core
, simple_core
);
69 static void simple_core(unsigned r
, const chacha_matrix src
,
71 { CHACHA_nR(dest
, src
, r
); CHACHA_FFWD(dest
, src
); }
73 #if CPUFAM_X86 || CPUFAM_AMD64
74 extern core__functype chacha_core_x86ish_sse2
;
78 extern core__functype chacha_core_arm_neon
;
81 static core__functype
*pick_core(void)
83 #if CPUFAM_X86 || CPUFAM_AMD64
84 DISPATCH_PICK_COND(chacha_core
, chacha_core_x86ish_sse2
,
85 cpu_feature_p(CPUFEAT_X86_SSE2
));
88 DISPATCH_PICK_COND(chacha_core
, chacha_core_arm_neon
,
89 cpu_feature_p(CPUFEAT_ARM_NEON
));
91 DISPATCH_PICK_FALLBACK(chacha_core
, simple_core
);
94 /* --- @populate@ --- *
96 * Arguments: @chacha_matrix a@ = a matrix to fill in
97 * @const void *key@ = pointer to key material
98 * @size_t ksz@ = size of key
102 * Use: Fills in a ChaCha matrix from the key, setting the
103 * appropriate constants according to the key length. The nonce
104 * and position words are left uninitialized.
107 static void populate(chacha_matrix a
, const void *key
, size_t ksz
)
109 const octet
*k
= key
;
111 KSZ_ASSERT(chacha
, ksz
);
113 a
[ 4] = LOAD32_L(k
+ 0);
114 a
[ 5] = LOAD32_L(k
+ 4);
116 a
[ 6] = LOAD16_L(k
+ 8);
119 a
[ 6] = LOAD32_L(k
+ 8);
120 a
[ 7] = LOAD32_L(k
+ 12);
129 a
[ 2] = ksz
== 10 ? CHACHA_C80
: CHACHA_C128
;
132 a
[ 8] = LOAD32_L(k
+ 16);
133 a
[ 9] = LOAD32_L(k
+ 20);
134 a
[10] = LOAD32_L(k
+ 24);
135 a
[11] = LOAD32_L(k
+ 28);
143 /*----- ChaCha implementation ---------------------------------------------*/
145 /* --- @chacha_init@ --- *
147 * Arguments: @chacha_ctx *ctx@ = context to fill in
148 * @const void *key@ = pointer to key material
149 * @size_t ksz@ = size of key (either 32 or 16)
150 * @const void *nonce@ = initial nonce, or null
154 * Use: Initializes a ChaCha context ready for use.
157 void chacha_init(chacha_ctx
*ctx
, const void *key
, size_t ksz
,
160 static const octet zerononce
[CHACHA_NONCESZ
];
162 populate(ctx
->a
, key
, ksz
);
163 chacha_setnonce(ctx
, nonce ? nonce
: zerononce
);
166 /* --- @chacha_setnonce@ --- *
168 * Arguments: @chacha_ctx *ctx@ = pointer to context
169 * @const void *nonce@ = the nonce (@CHACHA_NONCESZ@ bytes)
173 * Use: Set a new nonce in the context @ctx@, e.g., for processing a
174 * different message. The stream position is reset to zero (see
175 * @chacha_seek@ etc.).
178 void chacha_setnonce(chacha_ctx
*ctx
, const void *nonce
)
180 const octet
*n
= nonce
;
182 ctx
->a
[14] = LOAD32_L(n
+ 0);
183 ctx
->a
[15] = LOAD32_L(n
+ 4);
187 /* --- @chacha_seek{,u64}@ --- *
189 * Arguments: @chacha_ctx *ctx@ = pointer to context
190 * @unsigned long i@, @kludge64 i@ = new position to set
194 * Use: Sets a new stream position, in units of Chacha output
195 * blocks, which are @CHACHA_OUTSZ@ bytes each. Byte
196 * granularity can be achieved by calling @chachaR_encrypt@
200 void chacha_seek(chacha_ctx
*ctx
, unsigned long i
)
201 { kludge64 ii
; ASSIGN64(ii
, i
); chacha_seeku64(ctx
, ii
); }
203 void chacha_seeku64(chacha_ctx
*ctx
, kludge64 i
)
205 ctx
->a
[12] = LO64(i
); ctx
->a
[13] = HI64(i
);
206 ctx
->bufi
= CHACHA_OUTSZ
;
209 /* --- @chacha_tell{,u64}@ --- *
211 * Arguments: @chacha_ctx *ctx@ = pointer to context
213 * Returns: The current position in the output stream, in blocks,
217 unsigned long chacha_tell(chacha_ctx
*ctx
)
218 { kludge64 i
= chacha_tellu64(ctx
); return (GET64(unsigned long, i
)); }
220 kludge64
chacha_tellu64(chacha_ctx
*ctx
)
221 { kludge64 i
; SET64(i
, ctx
->a
[13], ctx
->a
[12]); return (i
); }
223 /* --- @chacha{20,12,8}_encrypt@ --- *
225 * Arguments: @chacha_ctx *ctx@ = pointer to context
226 * @const void *src@ = source buffer (or null)
227 * @void *dest@ = destination buffer (or null)
228 * @size_t sz@ = size of the buffers
232 * Use: Encrypts or decrypts @sz@ bytes of data from @src@ to @dest@.
233 * ChaCha works by XORing plaintext with a keystream, so
234 * encryption and decryption are the same operation. If @dest@
235 * is null then ignore @src@ and skip @sz@ bytes of the
236 * keystream. If @src@ is null, then just write the keystream
240 #define CHACHA_ENCRYPT(r, ctx, src, dest, sz) \
241 chacha##r##_encrypt(ctx, src, dest, sz)
242 #define DEFENCRYPT(r) \
243 void CHACHA_ENCRYPT(r, chacha_ctx *ctx, const void *src, \
244 void *dest, size_t sz) \
247 const octet *s = src; \
250 kludge64 pos, delta; \
252 SALSA20_OUTBUF(ctx, d, s, sz); \
256 n = sz/CHACHA_OUTSZ; \
257 pos = chacha_tellu64(ctx); \
258 ASSIGN64(delta, n); \
259 ADD64(pos, pos, delta); \
260 chacha_seeku64(ctx, pos); \
261 sz = sz%CHACHA_OUTSZ; \
263 while (sz >= CHACHA_OUTSZ) { \
264 core(r, ctx->a, b); \
265 CHACHA_STEP(ctx->a); \
266 SALSA20_GENFULL(b, d); \
267 sz -= CHACHA_OUTSZ; \
270 while (sz >= CHACHA_OUTSZ) { \
271 core(r, ctx->a, b); \
272 CHACHA_STEP(ctx->a); \
273 SALSA20_MIXFULL(b, d, s); \
274 sz -= CHACHA_OUTSZ; \
279 core(r, ctx->a, b); \
280 CHACHA_STEP(ctx->a); \
281 SALSA20_PREPBUF(ctx, b); \
282 SALSA20_OUTBUF(ctx, d, s, sz); \
286 CHACHA_VARS(DEFENCRYPT
)
288 /*----- HChaCha implementation --------------------------------------------*/
290 #define HCHACHA_RAW(r, ctx, src, dest) hchacha##r##_raw(ctx, src, dest)
291 #define HCHACHA_PRF(r, ctx, src, dest) hchacha##r##_prf(ctx, src, dest)
293 /* --- @hchacha{20,12,8}_prf@ --- *
295 * Arguments: @chacha_ctx *ctx@ = pointer to context
296 * @const void *src@ = the input (@HCHACHA_INSZ@ bytes)
297 * @void *dest@ = the output (@HCHACHA_OUTSZ@ bytes)
301 * Use: Apply the HChacha/r pseudorandom function to @src@, writing
302 * the result to @out@.
305 #define DEFHCHACHA(r) \
306 static void HCHACHA_RAW(r, chacha_matrix k, \
307 const uint32 *src, uint32 *dest) \
312 /* --- HChaCha, computed from full ChaCha --- * \
314 * The security proof makes use of the fact that HChaCha (i.e., \
315 * without the final feedforward step) can be computed from full \
316 * ChaCha using only knowledge of the non-secret input. I don't \
317 * want to compromise the performance of the main function by \
318 * making the feedforward step separate, but this operation is less \
319 * speed critical, so we do it the harder way. \
322 for (i = 0; i < 4; i++) k[12 + i] = src[i]; \
324 for (i = 0; i < 8; i++) dest[i] = a[(i + 4)^4] - k[(i + 4)^4]; \
327 void HCHACHA_PRF(r, chacha_ctx *ctx, const void *src, void *dest) \
329 const octet *s = src; \
331 uint32 in[4], out[8]; \
334 for (i = 0; i < 4; i++) in[i] = LOAD32_L(s + 4*i); \
335 HCHACHA_RAW(r, ctx->a, in, out); \
336 for (i = 0; i < 8; i++) STORE32_L(d + 4*i, out[i]); \
338 CHACHA_VARS(DEFHCHACHA
)
340 /*----- XChaCha implementation -------------------------------------------*/
342 /* --- Some convenient macros for naming functions --- *
344 * Because the crypto core is involved in XChaCha/r's per-nonce setup, we
345 * need to take an interest in the number of rounds in most of the various
346 * functions, and it will probably help if we distinguish the context
347 * structures for the various versions.
350 #define XCHACHA_CTX(r) xchacha##r##_ctx
351 #define XCHACHA_INIT(r, ctx, k, ksz, n) xchacha##r##_init(ctx, k, ksz, n)
352 #define XCHACHA_SETNONCE(r, ctx, n) xchacha##r##_setnonce(ctx, n)
353 #define XCHACHA_SEEK(r, ctx, i) xchacha##r##_seek(ctx, i)
354 #define XCHACHA_SEEKU64(r, ctx, i) xchacha##r##_seeku64(ctx, i)
355 #define XCHACHA_TELL(r, ctx) xchacha##r##_tell(ctx)
356 #define XCHACHA_TELLU64(r, ctx) xchacha##r##_tellu64(ctx)
357 #define XCHACHA_ENCRYPT(r, ctx, src, dest, sz) \
358 xchacha##r##_encrypt(ctx, src, dest, sz)
360 /* --- @xchacha{20,12,8}_init@ --- *
362 * Arguments: @xchachaR_ctx *ctx@ = the context to fill in
363 * @const void *key@ = pointer to key material
364 * @size_t ksz@ = size of key (either 32 or 16)
365 * @const void *nonce@ = initial nonce, or null
369 * Use: Initializes an XChaCha/r context ready for use.
371 * There is a different function for each number of rounds,
372 * unlike for plain ChaCha.
375 #define DEFXINIT(r) \
376 void XCHACHA_INIT(r, XCHACHA_CTX(r) *ctx, \
377 const void *key, size_t ksz, const void *nonce) \
379 static const octet zerononce[XCHACHA_NONCESZ]; \
381 populate(ctx->k, key, ksz); \
382 ctx->s.a[ 0] = CHACHA_A256; \
383 ctx->s.a[ 1] = CHACHA_B256; \
384 ctx->s.a[ 2] = CHACHA_C256; \
385 ctx->s.a[ 3] = CHACHA_D256; \
386 XCHACHA_SETNONCE(r, ctx, nonce ? nonce : zerononce); \
388 CHACHA_VARS(DEFXINIT
)
390 /* --- @xchacha{20,12,8}_setnonce@ --- *
392 * Arguments: @xchachaR_ctx *ctx@ = pointer to context
393 * @const void *nonce@ = the nonce (@XCHACHA_NONCESZ@ bytes)
397 * Use: Set a new nonce in the context @ctx@, e.g., for processing a
398 * different message. The stream position is reset to zero (see
399 * @chacha_seek@ etc.).
401 * There is a different function for each number of rounds,
402 * unlike for plain ChaCha.
405 #define DEFXNONCE(r) \
406 void XCHACHA_SETNONCE(r, XCHACHA_CTX(r) *ctx, const void *nonce) \
408 const octet *n = nonce; \
412 for (i = 0; i < 4; i++) in[i] = LOAD32_L(n + 4*i); \
413 HCHACHA_RAW(r, ctx->k, in, ctx->s.a + 4); \
414 chacha_setnonce(&ctx->s, n + 16); \
416 CHACHA_VARS(DEFXNONCE
)
418 /* --- @xchacha{20,12,8}_seek{,u64}@ --- *
420 * Arguments: @xchachaR_ctx *ctx@ = pointer to context
421 * @unsigned long i@, @kludge64 i@ = new position to set
425 * Use: Sets a new stream position, in units of ChaCha output
426 * blocks, which are @XCHACHA_OUTSZ@ bytes each. Byte
427 * granularity can be achieved by calling @xchachaR_encrypt@
430 * There is a different function for each number of rounds,
431 * unlike for plain ChaCha, because the context structures are
435 /* --- @xchacha{20,12,8}_tell{,u64}@ --- *
437 * Arguments: @chacha_ctx *ctx@ = pointer to context
439 * Returns: The current position in the output stream, in blocks,
442 * There is a different function for each number of rounds,
443 * unlike for plain ChaCha, because the context structures are
447 /* --- @xchacha{20,12,8}_encrypt@ --- *
449 * Arguments: @xchachaR_ctx *ctx@ = pointer to context
450 * @const void *src@ = source buffer (or null)
451 * @void *dest@ = destination buffer (or null)
452 * @size_t sz@ = size of the buffers
456 * Use: Encrypts or decrypts @sz@ bytes of data from @src@ to @dest@.
457 * XChaCha works by XORing plaintext with a keystream, so
458 * encryption and decryption are the same operation. If @dest@
459 * is null then ignore @src@ and skip @sz@ bytes of the
460 * keystream. If @src@ is null, then just write the keystream
464 #define DEFXPASSTHRU(r) \
465 void XCHACHA_SEEK(r, XCHACHA_CTX(r) *ctx, unsigned long i) \
466 { chacha_seek(&ctx->s, i); } \
467 void XCHACHA_SEEKU64(r, XCHACHA_CTX(r) *ctx, kludge64 i) \
468 { chacha_seeku64(&ctx->s, i); } \
469 unsigned long XCHACHA_TELL(r, XCHACHA_CTX(r) *ctx) \
470 { return chacha_tell(&ctx->s); } \
471 kludge64 XCHACHA_TELLU64(r, XCHACHA_CTX(r) *ctx) \
472 { return chacha_tellu64(&ctx->s); } \
473 void XCHACHA_ENCRYPT(r, XCHACHA_CTX(r) *ctx, \
474 const void *src, void *dest, size_t sz) \
475 { CHACHA_ENCRYPT(r, &ctx->s, src, dest, sz); }
476 CHACHA_VARS(DEFXPASSTHRU
)
478 /*----- Generic cipher interface ------------------------------------------*/
480 typedef struct gctx
{ gcipher c
; chacha_ctx ctx
; } gctx
;
482 static void gsetiv(gcipher
*c
, const void *iv
)
483 { gctx
*g
= (gctx
*)c
; chacha_setnonce(&g
->ctx
, iv
); }
485 static void gdestroy(gcipher
*c
)
486 { gctx
*g
= (gctx
*)c
; BURN(*g
); S_DESTROY(g
); }
488 static gcipher
*ginit(const void *k
, size_t sz
, const gcipher_ops
*ops
)
490 gctx
*g
= S_CREATE(gctx
);
492 chacha_init(&g
->ctx
, k
, sz
, 0);
496 #define DEFGCIPHER(r) \
498 static const gcipher_ops gops_##r; \
500 static gcipher *ginit_##r(const void *k, size_t sz) \
501 { return (ginit(k, sz, &gops_##r)); } \
503 static void gencrypt_##r(gcipher *c, const void *s, \
504 void *t, size_t sz) \
505 { gctx *g = (gctx *)c; CHACHA_ENCRYPT(r, &g->ctx, s, t, sz); } \
507 static const gcipher_ops gops_##r = { \
509 gencrypt_##r, gencrypt_##r, gdestroy, gsetiv, 0 \
512 const gccipher chacha##r = { \
513 "chacha" #r, chacha_keysz, \
514 CHACHA_NONCESZ, ginit_##r \
517 CHACHA_VARS(DEFGCIPHER
)
519 #define DEFGXCIPHER(r) \
521 typedef struct { gcipher c; XCHACHA_CTX(r) ctx; } gxctx_##r; \
523 static void gxsetiv_##r(gcipher *c, const void *iv) \
524 { gxctx_##r *g = (gxctx_##r *)c; XCHACHA_SETNONCE(r, &g->ctx, iv); } \
526 static void gxdestroy_##r(gcipher *c) \
527 { gxctx_##r *g = (gxctx_##r *)c; BURN(*g); S_DESTROY(g); } \
529 static const gcipher_ops gxops_##r; \
531 static gcipher *gxinit_##r(const void *k, size_t sz) \
533 gxctx_##r *g = S_CREATE(gxctx_##r); \
534 g->c.ops = &gxops_##r; \
535 XCHACHA_INIT(r, &g->ctx, k, sz, 0); \
539 static void gxencrypt_##r(gcipher *c, const void *s, \
540 void *t, size_t sz) \
542 gxctx_##r *g = (gxctx_##r *)c; \
543 XCHACHA_ENCRYPT(r, &g->ctx, s, t, sz); \
546 static const gcipher_ops gxops_##r = { \
548 gxencrypt_##r, gxencrypt_##r, gxdestroy_##r, gxsetiv_##r, 0 \
551 const gccipher xchacha##r = { \
552 "xchacha" #r, chacha_keysz, \
553 CHACHA_NONCESZ, gxinit_##r \
556 CHACHA_VARS(DEFGXCIPHER
)
558 /*----- Generic random number generator interface -------------------------*/
560 typedef struct grops
{
562 void (*seek
)(void *, kludge64
);
563 kludge64 (*tell
)(void *);
564 void (*setnonce
)(void *, const void *);
565 void (*generate
)(void *, void *, size_t);
568 typedef struct grbasectx
{
573 static int grmisc(grand
*r
, unsigned op
, ...)
575 octet buf
[XCHACHA_NONCESZ
];
576 grbasectx
*g
= (grbasectx
*)r
;
590 switch (va_arg(ap
, unsigned)) {
593 case GRAND_SEEDUINT32
:
594 case GRAND_SEEDBLOCK
:
609 i
= va_arg(ap
, unsigned); STORE32_L(buf
, i
);
610 memset(buf
+ 4, 0, g
->ops
->noncesz
- 4);
611 g
->ops
->setnonce(g
, buf
);
613 case GRAND_SEEDUINT32
:
614 i
= va_arg(ap
, uint32
); STORE32_L(buf
, i
);
615 memset(buf
+ 4, 0, g
->ops
->noncesz
- 4);
616 g
->ops
->setnonce(g
, buf
);
618 case GRAND_SEEDBLOCK
:
619 p
= va_arg(ap
, const void *);
620 sz
= va_arg(ap
, size_t);
621 if (sz
< g
->ops
->noncesz
) {
623 memset(buf
+ sz
, 0, g
->ops
->noncesz
- sz
);
626 g
->ops
->setnonce(g
, p
);
629 rr
= va_arg(ap
, grand
*);
630 rr
->ops
->fill(rr
, buf
, g
->ops
->noncesz
);
631 g
->ops
->setnonce(g
, buf
);
634 ul
= va_arg(ap
, unsigned long); ASSIGN64(pos
, ul
);
635 g
->ops
->seek(g
, pos
);
638 pos
= va_arg(ap
, kludge64
);
639 g
->ops
->seek(g
, pos
);
642 pos
= g
->ops
->tell(g
);
643 *va_arg(ap
, unsigned long *) = GET64(unsigned long, pos
);
646 *va_arg(ap
, kludge64
*) = g
->ops
->tell(g
);
656 static octet
grbyte(grand
*r
)
658 grbasectx
*g
= (grbasectx
*)r
;
660 g
->ops
->generate(g
, &o
, 1);
664 static uint32
grword(grand
*r
)
666 grbasectx
*g
= (grbasectx
*)r
;
668 g
->ops
->generate(g
, b
, sizeof(b
));
669 return (LOAD32_L(b
));
672 static void grfill(grand
*r
, void *p
, size_t sz
)
674 grbasectx
*g
= (grbasectx
*)r
;
675 g
->ops
->generate(r
, p
, sz
);
678 typedef struct grctx
{
683 static void gr_seek(void *r
, kludge64 pos
)
684 { grctx
*g
= r
; chacha_seeku64(&g
->ctx
, pos
); }
686 static kludge64
gr_tell(void *r
)
687 { grctx
*g
= r
; return (chacha_tellu64(&g
->ctx
)); }
689 static void gr_setnonce(void *r
, const void *n
)
690 { grctx
*g
= r
; chacha_setnonce(&g
->ctx
, n
); }
692 static void grdestroy(grand
*r
)
693 { grctx
*g
= (grctx
*)r
; BURN(*g
); S_DESTROY(g
); }
695 static grand
*grinit(const void *k
, size_t ksz
, const void *n
,
696 const grand_ops
*ops
, const grops
*myops
)
698 grctx
*g
= S_CREATE(grctx
);
701 chacha_init(&g
->ctx
, k
, ksz
, 0);
702 myops
->setnonce(g
, n
);
706 #define DEFGRAND(rr) \
708 static void gr_generate_##rr(void *r, void *b, size_t sz) \
709 { grctx *g = r; CHACHA_ENCRYPT(rr, &g->ctx, 0, b, sz); } \
711 static const grops grops_##rr = \
712 { CHACHA_NONCESZ, gr_seek, gr_tell, \
713 gr_setnonce, gr_generate_##rr }; \
715 static const grand_ops grops_rand_##rr = { \
716 "chacha" #rr, GRAND_CRYPTO, 0, \
717 grmisc, grdestroy, grword, \
718 grbyte, grword, grand_defaultrange, grfill \
721 grand *chacha##rr##_rand(const void *k, size_t ksz, const void *n) \
722 { return (grinit(k, ksz, n, &grops_rand_##rr, &grops_##rr)); }
723 CHACHA_VARS(DEFGRAND
)
725 #define DEFXGRAND(rr) \
727 typedef struct grxctx_##rr { \
729 XCHACHA_CTX(rr) ctx; \
732 static void grx_seek_##rr(void *r, kludge64 pos) \
733 { grxctx_##rr *g = r; XCHACHA_SEEKU64(rr, &g->ctx, pos); } \
735 static kludge64 grx_tell_##rr(void *r) \
736 { grxctx_##rr *g = r; return (XCHACHA_TELLU64(rr, &g->ctx)); } \
738 static void grx_setnonce_##rr(void *r, const void *n) \
739 { grxctx_##rr *g = r; XCHACHA_SETNONCE(rr, &g->ctx, n); } \
741 static void grxdestroy_##rr(grand *r) \
742 { grxctx_##rr *g = (grxctx_##rr *)r; BURN(*g); S_DESTROY(g); } \
744 static void grx_generate_##rr(void *r, void *b, size_t sz) \
745 { grxctx_##rr *g = r; XCHACHA_ENCRYPT(rr, &g->ctx, 0, b, sz); } \
747 static const grops grxops_##rr = \
748 { XCHACHA_NONCESZ, grx_seek_##rr, grx_tell_##rr, \
749 grx_setnonce_##rr, grx_generate_##rr }; \
751 static const grand_ops grxops_rand_##rr = { \
752 "xchacha" #rr, GRAND_CRYPTO, 0, \
753 grmisc, grxdestroy_##rr, grword, \
754 grbyte, grword, grand_defaultrange, grfill \
757 grand *xchacha##rr##_rand(const void *k, size_t ksz, const void *n) \
759 grxctx_##rr *g = S_CREATE(grxctx_##rr); \
760 g->r.r.ops = &grxops_rand_##rr; \
761 g->r.ops = &grxops_##rr; \
762 XCHACHA_INIT(rr, &g->ctx, k, ksz, n); \
765 CHACHA_VARS(DEFXGRAND
)
767 /*----- Test rig ----------------------------------------------------------*/
774 #include <mLib/quis.h>
775 #include <mLib/testrig.h>
777 #define DEFVCORE(r) \
778 static int v_core_##r(dstr *v) \
780 chacha_matrix a, b; \
781 dstr d = DSTR_INIT; \
785 DENSURE(&d, CHACHA_OUTSZ); d.len = CHACHA_OUTSZ; \
786 n = *(int *)v[0].buf; \
787 for (i = 0; i < CHACHA_OUTSZ/4; i++) \
788 a[i] = LOAD32_L(v[1].buf + 4*i); \
789 for (i = 0; i < n; i++) { \
791 memcpy(a, b, sizeof(a)); \
793 for (i = 0; i < CHACHA_OUTSZ/4; i++) STORE32_L(d.buf + 4*i, a[i]); \
795 if (d.len != v[2].len || memcmp(d.buf, v[2].buf, v[2].len) != 0) { \
797 printf("\nfail core:" \
798 "\n\titerations = %d" \
800 type_hex.dump(&v[1], stdout); \
801 printf("\n\texpected = "); \
802 type_hex.dump(&v[2], stdout); \
803 printf("\n\tcalculated = "); \
804 type_hex.dump(&d, stdout); \
811 CHACHA_VARS(DEFVCORE
)
813 #define CHACHA_CTX(r) chacha_ctx
814 #define CHACHA_INIT(r, ctx, k, ksz, n) chacha_init(ctx, k, ksz, n)
815 #define CHACHA_SEEKU64(r, ctx, i) chacha_seeku64(ctx, i)
816 #define XCHACHA_SEEKU64(r, ctx, i) xchacha##r##_seeku64(ctx, i)
818 #define DEFxVENC(base, BASE, r) \
819 static int v_encrypt_##base##_##r(dstr *v) \
822 dstr d = DSTR_INIT; \
824 const octet *p, *p0; \
826 size_t sz, sz0, step; \
827 unsigned long skip; \
830 if (v[4].len) { p0 = (const octet *)v[4].buf; sz0 = v[4].len; } \
831 else { p0 = 0; sz0 = v[5].len; } \
832 DENSURE(&d, sz0); d.len = sz0; \
833 skip = *(unsigned long *)v[3].buf; \
836 while (step < sz0 + skip) { \
837 step = step ? 3*step + 4 : 1; \
838 if (step > sz0 + skip) step = sz0 + skip; \
839 BASE##_INIT(r, &ctx, v[0].buf, v[0].len, v[1].buf); \
841 LOAD64_(pos, v[2].buf); \
842 BASE##_SEEKU64(r, &ctx, pos); \
845 for (sz = skip; sz >= step; sz -= step) \
846 BASE##_ENCRYPT(r, &ctx, 0, 0, step); \
847 if (sz) BASE##_ENCRYPT(r, &ctx, 0, 0, sz); \
848 for (p = p0, q = (octet *)d.buf, sz = sz0; \
850 sz -= step, q += step) { \
851 BASE##_ENCRYPT(r, &ctx, p, q, step); \
854 if (sz) BASE##_ENCRYPT(r, &ctx, p, q, sz); \
856 if (d.len != v[5].len || memcmp(d.buf, v[5].buf, v[5].len) != 0) { \
858 printf("\nfail encrypt:" \
860 "\n\tkey = ", (unsigned long)step); \
861 type_hex.dump(&v[0], stdout); \
862 printf("\n\tnonce = "); \
863 type_hex.dump(&v[1], stdout); \
864 printf("\n\tposition = "); \
865 type_hex.dump(&v[2], stdout); \
866 printf("\n\tskip = %lu", skip); \
867 printf("\n\tmessage = "); \
868 type_hex.dump(&v[4], stdout); \
869 printf("\n\texpected = "); \
870 type_hex.dump(&v[5], stdout); \
871 printf("\n\tcalculated = "); \
872 type_hex.dump(&d, stdout); \
880 #define DEFVENC(r) DEFxVENC(chacha, CHACHA, r)
881 #define DEFXVENC(r) DEFxVENC(xchacha, XCHACHA, r)
883 CHACHA_VARS(DEFXVENC
)
885 static test_chunk defs
[] = {
886 #define DEFxTAB(base, r) \
887 { #base #r, v_encrypt_##base##_##r, \
888 { &type_hex, &type_hex, &type_hex, &type_ulong, \
889 &type_hex, &type_hex, 0 } },
891 { "chacha" #r "-core", v_core_##r, \
892 { &type_int, &type_hex, &type_hex, 0 } }, \
894 #define DEFXTAB(r) DEFxTAB(xchacha, r)
900 int main(int argc
, char *argv
[])
902 test_run(argc
, argv
, defs
, SRCDIR
"/t/chacha");
908 /*----- That's all, folks -------------------------------------------------*/