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
;
75 extern core__functype chacha_core_x86ish_avx
;
79 extern core__functype chacha_core_arm_neon
;
83 extern core__functype chacha_core_arm64
;
86 static core__functype
*pick_core(void)
88 #if CPUFAM_X86 || CPUFAM_AMD64
89 DISPATCH_PICK_COND(chacha_core
, chacha_core_x86ish_avx
,
90 cpu_feature_p(CPUFEAT_X86_AVX
));
91 DISPATCH_PICK_COND(chacha_core
, chacha_core_x86ish_sse2
,
92 cpu_feature_p(CPUFEAT_X86_SSE2
));
95 DISPATCH_PICK_COND(chacha_core
, chacha_core_arm_neon
,
96 cpu_feature_p(CPUFEAT_ARM_NEON
));
99 DISPATCH_PICK_COND(chacha_core
, chacha_core_arm64
, 1);
101 DISPATCH_PICK_FALLBACK(chacha_core
, simple_core
);
104 /* --- @populate@ --- *
106 * Arguments: @chacha_matrix a@ = a matrix to fill in
107 * @const void *key@ = pointer to key material
108 * @size_t ksz@ = size of key
112 * Use: Fills in a ChaCha matrix from the key, setting the
113 * appropriate constants according to the key length. The nonce
114 * and position words are left uninitialized.
117 static void populate(chacha_matrix a
, const void *key
, size_t ksz
)
119 const octet
*k
= key
;
121 KSZ_ASSERT(chacha
, ksz
);
123 a
[ 4] = LOAD32_L(k
+ 0);
124 a
[ 5] = LOAD32_L(k
+ 4);
126 a
[ 6] = LOAD16_L(k
+ 8);
129 a
[ 6] = LOAD32_L(k
+ 8);
130 a
[ 7] = LOAD32_L(k
+ 12);
139 a
[ 2] = ksz
== 10 ? CHACHA_C80
: CHACHA_C128
;
142 a
[ 8] = LOAD32_L(k
+ 16);
143 a
[ 9] = LOAD32_L(k
+ 20);
144 a
[10] = LOAD32_L(k
+ 24);
145 a
[11] = LOAD32_L(k
+ 28);
153 /*----- ChaCha implementation ---------------------------------------------*/
155 /* --- @chacha_init@ --- *
157 * Arguments: @chacha_ctx *ctx@ = context to fill in
158 * @const void *key@ = pointer to key material
159 * @size_t ksz@ = size of key (either 32 or 16)
160 * @const void *nonce@ = initial nonce, or null
164 * Use: Initializes a ChaCha context ready for use.
167 void chacha_init(chacha_ctx
*ctx
, const void *key
, size_t ksz
,
170 static const octet zerononce
[CHACHA_NONCESZ
];
172 populate(ctx
->a
, key
, ksz
);
173 chacha_setnonce(ctx
, nonce ? nonce
: zerononce
);
176 /* --- @chacha_setnonce{,_ietf}@ --- *
178 * Arguments: @chacha_ctx *ctx@ = pointer to context
179 * @const void *nonce@ = the nonce (@CHACHA_NONCESZ@ or
180 * @CHACHA_IETF_NONCESZ@ bytes)
184 * Use: Set a new nonce in the context @ctx@, e.g., for processing a
185 * different message. The stream position is reset to zero (see
186 * @chacha_seek@ etc.).
189 void chacha_setnonce(chacha_ctx
*ctx
, const void *nonce
)
191 const octet
*n
= nonce
;
193 ctx
->a
[14] = LOAD32_L(n
+ 0);
194 ctx
->a
[15] = LOAD32_L(n
+ 4);
198 void chacha_setnonce_ietf(chacha_ctx
*ctx
, const void *nonce
)
200 const octet
*n
= nonce
;
202 ctx
->a
[13] = LOAD32_L(n
+ 0);
203 ctx
->a
[14] = LOAD32_L(n
+ 4);
204 ctx
->a
[15] = LOAD32_L(n
+ 8);
205 chacha_seek_ietf(ctx
, 0);
208 /* --- @chacha_seek{,u64,_ietf}@ --- *
210 * Arguments: @chacha_ctx *ctx@ = pointer to context
211 * @unsigned long i@, @kludge64 i@, @uint32 i@ = new position
215 * Use: Sets a new stream position, in units of Chacha output
216 * blocks, which are @CHACHA_OUTSZ@ bytes each. Byte
217 * granularity can be achieved by calling @chachaR_encrypt@
221 void chacha_seek(chacha_ctx
*ctx
, unsigned long i
)
222 { kludge64 ii
; ASSIGN64(ii
, i
); chacha_seeku64(ctx
, ii
); }
224 void chacha_seeku64(chacha_ctx
*ctx
, kludge64 i
)
226 ctx
->a
[12] = LO64(i
); ctx
->a
[13] = HI64(i
);
227 ctx
->bufi
= CHACHA_OUTSZ
;
230 void chacha_seek_ietf(chacha_ctx
*ctx
, uint32 i
)
233 /* --- @chacha_tell{,u64,_ietf}@ --- *
235 * Arguments: @chacha_ctx *ctx@ = pointer to context
237 * Returns: The current position in the output stream, in blocks,
241 unsigned long chacha_tell(chacha_ctx
*ctx
)
242 { kludge64 i
= chacha_tellu64(ctx
); return (GET64(unsigned long, i
)); }
244 kludge64
chacha_tellu64(chacha_ctx
*ctx
)
245 { kludge64 i
; SET64(i
, ctx
->a
[13], ctx
->a
[12]); return (i
); }
247 uint32
chacha_tell_ietf(chacha_ctx
*ctx
)
248 { return (ctx
->a
[12]); }
250 /* --- @chacha{20,12,8}_encrypt@ --- *
252 * Arguments: @chacha_ctx *ctx@ = pointer to context
253 * @const void *src@ = source buffer (or null)
254 * @void *dest@ = destination buffer (or null)
255 * @size_t sz@ = size of the buffers
259 * Use: Encrypts or decrypts @sz@ bytes of data from @src@ to @dest@.
260 * ChaCha works by XORing plaintext with a keystream, so
261 * encryption and decryption are the same operation. If @dest@
262 * is null then ignore @src@ and skip @sz@ bytes of the
263 * keystream. If @src@ is null, then just write the keystream
267 #define CHACHA_ENCRYPT(r, ctx, src, dest, sz) \
268 chacha##r##_encrypt(ctx, src, dest, sz)
269 #define DEFENCRYPT(r) \
270 void CHACHA_ENCRYPT(r, chacha_ctx *ctx, const void *src, \
271 void *dest, size_t sz) \
274 const octet *s = src; \
277 kludge64 pos, delta; \
279 SALSA20_OUTBUF(ctx, d, s, sz); \
283 n = sz/CHACHA_OUTSZ; \
284 pos = chacha_tellu64(ctx); \
285 ASSIGN64(delta, n); \
286 ADD64(pos, pos, delta); \
287 chacha_seeku64(ctx, pos); \
288 sz = sz%CHACHA_OUTSZ; \
290 while (sz >= CHACHA_OUTSZ) { \
291 core(r, ctx->a, b); \
292 CHACHA_STEP(ctx->a); \
293 SALSA20_GENFULL(b, d); \
294 sz -= CHACHA_OUTSZ; \
297 while (sz >= CHACHA_OUTSZ) { \
298 core(r, ctx->a, b); \
299 CHACHA_STEP(ctx->a); \
300 SALSA20_MIXFULL(b, d, s); \
301 sz -= CHACHA_OUTSZ; \
306 core(r, ctx->a, b); \
307 CHACHA_STEP(ctx->a); \
308 SALSA20_PREPBUF(ctx, b); \
309 SALSA20_OUTBUF(ctx, d, s, sz); \
313 CHACHA_VARS(DEFENCRYPT
)
315 /*----- HChaCha implementation --------------------------------------------*/
317 #define HCHACHA_RAW(r, ctx, src, dest) hchacha##r##_raw(ctx, src, dest)
318 #define HCHACHA_PRF(r, ctx, src, dest) hchacha##r##_prf(ctx, src, dest)
320 /* --- @hchacha{20,12,8}_prf@ --- *
322 * Arguments: @chacha_ctx *ctx@ = pointer to context
323 * @const void *src@ = the input (@HCHACHA_INSZ@ bytes)
324 * @void *dest@ = the output (@HCHACHA_OUTSZ@ bytes)
328 * Use: Apply the HChacha/r pseudorandom function to @src@, writing
329 * the result to @out@.
332 #define DEFHCHACHA(r) \
333 static void HCHACHA_RAW(r, chacha_matrix k, \
334 const uint32 *src, uint32 *dest) \
339 /* --- HChaCha, computed from full ChaCha --- * \
341 * The security proof makes use of the fact that HChaCha (i.e., \
342 * without the final feedforward step) can be computed from full \
343 * ChaCha using only knowledge of the non-secret input. I don't \
344 * want to compromise the performance of the main function by \
345 * making the feedforward step separate, but this operation is less \
346 * speed critical, so we do it the harder way. \
349 for (i = 0; i < 4; i++) k[12 + i] = src[i]; \
351 for (i = 0; i < 8; i++) dest[i] = a[(i + 4)^4] - k[(i + 4)^4]; \
354 void HCHACHA_PRF(r, chacha_ctx *ctx, const void *src, void *dest) \
356 const octet *s = src; \
358 uint32 in[4], out[8]; \
361 for (i = 0; i < 4; i++) in[i] = LOAD32_L(s + 4*i); \
362 HCHACHA_RAW(r, ctx->a, in, out); \
363 for (i = 0; i < 8; i++) STORE32_L(d + 4*i, out[i]); \
365 CHACHA_VARS(DEFHCHACHA
)
367 /*----- XChaCha implementation -------------------------------------------*/
369 /* --- Some convenient macros for naming functions --- *
371 * Because the crypto core is involved in XChaCha/r's per-nonce setup, we
372 * need to take an interest in the number of rounds in most of the various
373 * functions, and it will probably help if we distinguish the context
374 * structures for the various versions.
377 #define XCHACHA_CTX(r) xchacha##r##_ctx
378 #define XCHACHA_INIT(r, ctx, k, ksz, n) xchacha##r##_init(ctx, k, ksz, n)
379 #define XCHACHA_SETNONCE(r, ctx, n) xchacha##r##_setnonce(ctx, n)
380 #define XCHACHA_SEEK(r, ctx, i) xchacha##r##_seek(ctx, i)
381 #define XCHACHA_SEEKU64(r, ctx, i) xchacha##r##_seeku64(ctx, i)
382 #define XCHACHA_TELL(r, ctx) xchacha##r##_tell(ctx)
383 #define XCHACHA_TELLU64(r, ctx) xchacha##r##_tellu64(ctx)
384 #define XCHACHA_ENCRYPT(r, ctx, src, dest, sz) \
385 xchacha##r##_encrypt(ctx, src, dest, sz)
387 /* --- @xchacha{20,12,8}_init@ --- *
389 * Arguments: @xchachaR_ctx *ctx@ = the context to fill in
390 * @const void *key@ = pointer to key material
391 * @size_t ksz@ = size of key (either 32 or 16)
392 * @const void *nonce@ = initial nonce, or null
396 * Use: Initializes an XChaCha/r context ready for use.
398 * There is a different function for each number of rounds,
399 * unlike for plain ChaCha.
402 #define DEFXINIT(r) \
403 void XCHACHA_INIT(r, XCHACHA_CTX(r) *ctx, \
404 const void *key, size_t ksz, const void *nonce) \
406 static const octet zerononce[XCHACHA_NONCESZ]; \
408 populate(ctx->k, key, ksz); \
409 ctx->s.a[ 0] = CHACHA_A256; \
410 ctx->s.a[ 1] = CHACHA_B256; \
411 ctx->s.a[ 2] = CHACHA_C256; \
412 ctx->s.a[ 3] = CHACHA_D256; \
413 XCHACHA_SETNONCE(r, ctx, nonce ? nonce : zerononce); \
415 CHACHA_VARS(DEFXINIT
)
417 /* --- @xchacha{20,12,8}_setnonce@ --- *
419 * Arguments: @xchachaR_ctx *ctx@ = pointer to context
420 * @const void *nonce@ = the nonce (@XCHACHA_NONCESZ@ bytes)
424 * Use: Set a new nonce in the context @ctx@, e.g., for processing a
425 * different message. The stream position is reset to zero (see
426 * @chacha_seek@ etc.).
428 * There is a different function for each number of rounds,
429 * unlike for plain ChaCha.
432 #define DEFXNONCE(r) \
433 void XCHACHA_SETNONCE(r, XCHACHA_CTX(r) *ctx, const void *nonce) \
435 const octet *n = nonce; \
439 for (i = 0; i < 4; i++) in[i] = LOAD32_L(n + 4*i); \
440 HCHACHA_RAW(r, ctx->k, in, ctx->s.a + 4); \
441 chacha_setnonce(&ctx->s, n + 16); \
443 CHACHA_VARS(DEFXNONCE
)
445 /* --- @xchacha{20,12,8}_seek{,u64}@ --- *
447 * Arguments: @xchachaR_ctx *ctx@ = pointer to context
448 * @unsigned long i@, @kludge64 i@ = new position to set
452 * Use: Sets a new stream position, in units of ChaCha output
453 * blocks, which are @XCHACHA_OUTSZ@ bytes each. Byte
454 * granularity can be achieved by calling @xchachaR_encrypt@
457 * There is a different function for each number of rounds,
458 * unlike for plain ChaCha, because the context structures are
462 /* --- @xchacha{20,12,8}_tell{,u64}@ --- *
464 * Arguments: @chacha_ctx *ctx@ = pointer to context
466 * Returns: The current position in the output stream, in blocks,
469 * There is a different function for each number of rounds,
470 * unlike for plain ChaCha, because the context structures are
474 /* --- @xchacha{20,12,8}_encrypt@ --- *
476 * Arguments: @xchachaR_ctx *ctx@ = pointer to context
477 * @const void *src@ = source buffer (or null)
478 * @void *dest@ = destination buffer (or null)
479 * @size_t sz@ = size of the buffers
483 * Use: Encrypts or decrypts @sz@ bytes of data from @src@ to @dest@.
484 * XChaCha works by XORing plaintext with a keystream, so
485 * encryption and decryption are the same operation. If @dest@
486 * is null then ignore @src@ and skip @sz@ bytes of the
487 * keystream. If @src@ is null, then just write the keystream
491 #define DEFXPASSTHRU(r) \
492 void XCHACHA_SEEK(r, XCHACHA_CTX(r) *ctx, unsigned long i) \
493 { chacha_seek(&ctx->s, i); } \
494 void XCHACHA_SEEKU64(r, XCHACHA_CTX(r) *ctx, kludge64 i) \
495 { chacha_seeku64(&ctx->s, i); } \
496 unsigned long XCHACHA_TELL(r, XCHACHA_CTX(r) *ctx) \
497 { return chacha_tell(&ctx->s); } \
498 kludge64 XCHACHA_TELLU64(r, XCHACHA_CTX(r) *ctx) \
499 { return chacha_tellu64(&ctx->s); } \
500 void XCHACHA_ENCRYPT(r, XCHACHA_CTX(r) *ctx, \
501 const void *src, void *dest, size_t sz) \
502 { CHACHA_ENCRYPT(r, &ctx->s, src, dest, sz); }
503 CHACHA_VARS(DEFXPASSTHRU
)
505 /*----- Generic cipher interface ------------------------------------------*/
507 typedef struct gctx
{ gcipher c
; chacha_ctx ctx
; } gctx
;
509 static void gsetiv(gcipher
*c
, const void *iv
)
510 { gctx
*g
= (gctx
*)c
; chacha_setnonce(&g
->ctx
, iv
); }
512 static void gsetiv_ietf(gcipher
*c
, const void *iv
)
513 { gctx
*g
= (gctx
*)c
; chacha_setnonce_ietf(&g
->ctx
, iv
); }
515 static void gdestroy(gcipher
*c
)
516 { gctx
*g
= (gctx
*)c
; BURN(*g
); S_DESTROY(g
); }
518 static gcipher
*ginit(const void *k
, size_t sz
, const gcipher_ops
*ops
)
520 gctx
*g
= S_CREATE(gctx
);
522 chacha_init(&g
->ctx
, k
, sz
, 0);
526 #define DEFGCIPHER(r) \
528 static const gcipher_ops gops_##r, gops_##r##_ietf; \
530 static gcipher *ginit_##r(const void *k, size_t sz) \
531 { return (ginit(k, sz, &gops_##r)); } \
533 static gcipher *ginit_##r##_ietf(const void *k, size_t sz) \
534 { return (ginit(k, sz, &gops_##r##_ietf)); } \
536 static void gencrypt_##r(gcipher *c, const void *s, \
537 void *t, size_t sz) \
538 { gctx *g = (gctx *)c; CHACHA_ENCRYPT(r, &g->ctx, s, t, sz); } \
540 static const gcipher_ops gops_##r = { \
542 gencrypt_##r, gencrypt_##r, gdestroy, gsetiv, 0 \
545 static const gcipher_ops gops_##r##_ietf = { \
547 gencrypt_##r, gencrypt_##r, gdestroy, gsetiv_ietf, 0 \
550 const gccipher chacha##r = { \
551 "chacha" #r, chacha_keysz, \
552 CHACHA_NONCESZ, ginit_##r \
555 const gccipher chacha##r##_ietf = { \
556 "chacha" #r "-ietf", chacha_keysz, \
557 CHACHA_IETF_NONCESZ, ginit_##r##_ietf \
560 CHACHA_VARS(DEFGCIPHER
)
562 #define DEFGXCIPHER(r) \
564 typedef struct { gcipher c; XCHACHA_CTX(r) ctx; } gxctx_##r; \
566 static void gxsetiv_##r(gcipher *c, const void *iv) \
567 { gxctx_##r *g = (gxctx_##r *)c; XCHACHA_SETNONCE(r, &g->ctx, iv); } \
569 static void gxdestroy_##r(gcipher *c) \
570 { gxctx_##r *g = (gxctx_##r *)c; BURN(*g); S_DESTROY(g); } \
572 static const gcipher_ops gxops_##r; \
574 static gcipher *gxinit_##r(const void *k, size_t sz) \
576 gxctx_##r *g = S_CREATE(gxctx_##r); \
577 g->c.ops = &gxops_##r; \
578 XCHACHA_INIT(r, &g->ctx, k, sz, 0); \
582 static void gxencrypt_##r(gcipher *c, const void *s, \
583 void *t, size_t sz) \
585 gxctx_##r *g = (gxctx_##r *)c; \
586 XCHACHA_ENCRYPT(r, &g->ctx, s, t, sz); \
589 static const gcipher_ops gxops_##r = { \
591 gxencrypt_##r, gxencrypt_##r, gxdestroy_##r, gxsetiv_##r, 0 \
594 const gccipher xchacha##r = { \
595 "xchacha" #r, chacha_keysz, \
596 CHACHA_NONCESZ, gxinit_##r \
599 CHACHA_VARS(DEFGXCIPHER
)
601 /*----- Generic random number generator interface -------------------------*/
603 typedef struct grops
{
605 void (*seek
)(void *, kludge64
);
606 kludge64 (*tell
)(void *);
607 void (*setnonce
)(void *, const void *);
608 void (*generate
)(void *, void *, size_t);
611 typedef struct grbasectx
{
616 static int grmisc(grand
*r
, unsigned op
, ...)
618 octet buf
[XCHACHA_NONCESZ
];
619 grbasectx
*g
= (grbasectx
*)r
;
633 switch (va_arg(ap
, unsigned)) {
636 case GRAND_SEEDUINT32
:
637 case GRAND_SEEDBLOCK
:
652 i
= va_arg(ap
, unsigned); STORE32_L(buf
, i
);
653 memset(buf
+ 4, 0, g
->ops
->noncesz
- 4);
654 g
->ops
->setnonce(g
, buf
);
656 case GRAND_SEEDUINT32
:
657 i
= va_arg(ap
, uint32
); STORE32_L(buf
, i
);
658 memset(buf
+ 4, 0, g
->ops
->noncesz
- 4);
659 g
->ops
->setnonce(g
, buf
);
661 case GRAND_SEEDBLOCK
:
662 p
= va_arg(ap
, const void *);
663 sz
= va_arg(ap
, size_t);
664 if (sz
< g
->ops
->noncesz
) {
666 memset(buf
+ sz
, 0, g
->ops
->noncesz
- sz
);
669 g
->ops
->setnonce(g
, p
);
672 rr
= va_arg(ap
, grand
*);
673 rr
->ops
->fill(rr
, buf
, g
->ops
->noncesz
);
674 g
->ops
->setnonce(g
, buf
);
677 ul
= va_arg(ap
, unsigned long); ASSIGN64(pos
, ul
);
678 g
->ops
->seek(g
, pos
);
681 pos
= va_arg(ap
, kludge64
);
682 g
->ops
->seek(g
, pos
);
685 pos
= g
->ops
->tell(g
);
686 *va_arg(ap
, unsigned long *) = GET64(unsigned long, pos
);
689 *va_arg(ap
, kludge64
*) = g
->ops
->tell(g
);
699 static octet
grbyte(grand
*r
)
701 grbasectx
*g
= (grbasectx
*)r
;
703 g
->ops
->generate(g
, &o
, 1);
707 static uint32
grword(grand
*r
)
709 grbasectx
*g
= (grbasectx
*)r
;
711 g
->ops
->generate(g
, b
, sizeof(b
));
712 return (LOAD32_L(b
));
715 static void grfill(grand
*r
, void *p
, size_t sz
)
717 grbasectx
*g
= (grbasectx
*)r
;
718 g
->ops
->generate(r
, p
, sz
);
721 typedef struct grctx
{
726 static void gr_seek(void *r
, kludge64 pos
)
727 { grctx
*g
= r
; chacha_seeku64(&g
->ctx
, pos
); }
729 static void gr_seek_ietf(void *r
, kludge64 pos
)
730 { grctx
*g
= r
; chacha_seek_ietf(&g
->ctx
, LO64(pos
)); }
732 static kludge64
gr_tell(void *r
)
733 { grctx
*g
= r
; return (chacha_tellu64(&g
->ctx
)); }
735 static kludge64
gr_tell_ietf(void *r
)
740 SET64(pos
, 0, chacha_tell_ietf(&g
->ctx
));
744 static void gr_setnonce(void *r
, const void *n
)
745 { grctx
*g
= r
; chacha_setnonce(&g
->ctx
, n
); }
747 static void gr_setnonce_ietf(void *r
, const void *n
)
748 { grctx
*g
= r
; chacha_setnonce_ietf(&g
->ctx
, n
); }
750 static void grdestroy(grand
*r
)
751 { grctx
*g
= (grctx
*)r
; BURN(*g
); S_DESTROY(g
); }
753 static grand
*grinit(const void *k
, size_t ksz
, const void *n
,
754 const grand_ops
*ops
, const grops
*myops
)
756 grctx
*g
= S_CREATE(grctx
);
759 chacha_init(&g
->ctx
, k
, ksz
, 0);
760 if (n
) myops
->setnonce(g
, n
);
764 #define DEFGRAND(rr) \
766 static void gr_generate_##rr(void *r, void *b, size_t sz) \
767 { grctx *g = r; CHACHA_ENCRYPT(rr, &g->ctx, 0, b, sz); } \
769 static const grops grops_##rr = \
770 { CHACHA_NONCESZ, gr_seek, gr_tell, \
771 gr_setnonce, gr_generate_##rr }; \
773 static const grops grops_##rr##_ietf = \
774 { CHACHA_IETF_NONCESZ, gr_seek_ietf, gr_tell_ietf, \
775 gr_setnonce_ietf, gr_generate_##rr }; \
777 static const grand_ops grops_rand_##rr = { \
778 "chacha" #rr, GRAND_CRYPTO, 0, \
779 grmisc, grdestroy, grword, \
780 grbyte, grword, grand_defaultrange, grfill \
783 static const grand_ops grops_rand_##rr##_ietf = { \
784 "chacha" #rr "-ietf", GRAND_CRYPTO, 0, \
785 grmisc, grdestroy, grword, \
786 grbyte, grword, grand_defaultrange, grfill \
789 grand *chacha##rr##_rand(const void *k, size_t ksz, const void *n) \
790 { return (grinit(k, ksz, n, &grops_rand_##rr, &grops_##rr)); } \
792 grand *chacha##rr##_ietf_rand(const void *k, size_t ksz, \
795 return (grinit(k, ksz, n, \
796 &grops_rand_##rr##_ietf, \
797 &grops_##rr##_ietf)); \
800 CHACHA_VARS(DEFGRAND
)
802 #define DEFXGRAND(rr) \
804 typedef struct grxctx_##rr { \
806 XCHACHA_CTX(rr) ctx; \
809 static void grx_seek_##rr(void *r, kludge64 pos) \
810 { grxctx_##rr *g = r; XCHACHA_SEEKU64(rr, &g->ctx, pos); } \
812 static kludge64 grx_tell_##rr(void *r) \
813 { grxctx_##rr *g = r; return (XCHACHA_TELLU64(rr, &g->ctx)); } \
815 static void grx_setnonce_##rr(void *r, const void *n) \
816 { grxctx_##rr *g = r; XCHACHA_SETNONCE(rr, &g->ctx, n); } \
818 static void grxdestroy_##rr(grand *r) \
819 { grxctx_##rr *g = (grxctx_##rr *)r; BURN(*g); S_DESTROY(g); } \
821 static void grx_generate_##rr(void *r, void *b, size_t sz) \
822 { grxctx_##rr *g = r; XCHACHA_ENCRYPT(rr, &g->ctx, 0, b, sz); } \
824 static const grops grxops_##rr = \
825 { XCHACHA_NONCESZ, grx_seek_##rr, grx_tell_##rr, \
826 grx_setnonce_##rr, grx_generate_##rr }; \
828 static const grand_ops grxops_rand_##rr = { \
829 "xchacha" #rr, GRAND_CRYPTO, 0, \
830 grmisc, grxdestroy_##rr, grword, \
831 grbyte, grword, grand_defaultrange, grfill \
834 grand *xchacha##rr##_rand(const void *k, size_t ksz, const void *n) \
836 grxctx_##rr *g = S_CREATE(grxctx_##rr); \
837 g->r.r.ops = &grxops_rand_##rr; \
838 g->r.ops = &grxops_##rr; \
839 XCHACHA_INIT(rr, &g->ctx, k, ksz, n); \
842 CHACHA_VARS(DEFXGRAND
)
844 /*----- Test rig ----------------------------------------------------------*/
851 #include <mLib/quis.h>
852 #include <mLib/testrig.h>
854 #define DEFVCORE(r) \
855 static int v_core_##r(dstr *v) \
857 chacha_matrix a, b; \
858 dstr d = DSTR_INIT; \
862 DENSURE(&d, CHACHA_OUTSZ); d.len = CHACHA_OUTSZ; \
863 n = *(int *)v[0].buf; \
864 for (i = 0; i < CHACHA_OUTSZ/4; i++) \
865 a[i] = LOAD32_L(v[1].buf + 4*i); \
866 for (i = 0; i < n; i++) { \
868 memcpy(a, b, sizeof(a)); \
870 for (i = 0; i < CHACHA_OUTSZ/4; i++) STORE32_L(d.buf + 4*i, a[i]); \
872 if (d.len != v[2].len || memcmp(d.buf, v[2].buf, v[2].len) != 0) { \
874 printf("\nfail core:" \
875 "\n\titerations = %d" \
877 type_hex.dump(&v[1], stdout); \
878 printf("\n\texpected = "); \
879 type_hex.dump(&v[2], stdout); \
880 printf("\n\tcalculated = "); \
881 type_hex.dump(&d, stdout); \
888 CHACHA_VARS(DEFVCORE
)
890 #define CHACHA_CTX(r) chacha_ctx
892 #define CHACHA_TESTSETUP(r, ctx, k, ksz, n, nsz, p, psz) do { \
894 chacha_init(ctx, k, ksz, 0); \
895 if (nsz == 8) chacha_setnonce(ctx, n); \
896 else if (nsz == 12) chacha_setnonce_ietf(ctx, n); \
897 if (psz == 8) { LOAD64_(pos64, p); chacha_seeku64(ctx, pos64); } \
898 else if (psz == 4) chacha_seek_ietf(ctx, LOAD32(p)); \
901 #define XCHACHA_TESTSETUP(r, ctx, k, ksz, n, nsz, p, psz) do { \
903 XCHACHA_INIT(r, ctx, k, ksz, 0); \
904 if (nsz == 24) XCHACHA_SETNONCE(r, ctx, n); \
905 if (psz == 8) { LOAD64_(pos64, p); xchacha##r##_seeku64(ctx, pos64); } \
908 #define DEFxVENC(base, BASE, r) \
909 static int v_encrypt_##base##_##r(dstr *v) \
912 dstr d = DSTR_INIT; \
913 const octet *p, *p0; \
915 size_t sz, sz0, step; \
916 unsigned long skip; \
919 if (v[4].len) { p0 = (const octet *)v[4].buf; sz0 = v[4].len; } \
920 else { p0 = 0; sz0 = v[5].len; } \
921 DENSURE(&d, sz0); d.len = sz0; \
922 skip = *(unsigned long *)v[3].buf; \
925 while (step < sz0 + skip) { \
926 step = step ? 3*step + 4 : 1; \
927 if (step > sz0 + skip) step = sz0 + skip; \
928 BASE##_TESTSETUP(r, &ctx, v[0].buf, v[0].len, \
929 v[1].buf, v[1].len, v[2].buf, v[2].len); \
931 for (sz = skip; sz >= step; sz -= step) \
932 BASE##_ENCRYPT(r, &ctx, 0, 0, step); \
933 if (sz) BASE##_ENCRYPT(r, &ctx, 0, 0, sz); \
934 for (p = p0, q = (octet *)d.buf, sz = sz0; \
936 sz -= step, q += step) { \
937 BASE##_ENCRYPT(r, &ctx, p, q, step); \
940 if (sz) BASE##_ENCRYPT(r, &ctx, p, q, sz); \
942 if (d.len != v[5].len || memcmp(d.buf, v[5].buf, v[5].len) != 0) { \
944 printf("\nfail encrypt:" \
946 "\n\tkey = ", (unsigned long)step); \
947 type_hex.dump(&v[0], stdout); \
948 printf("\n\tnonce = "); \
949 type_hex.dump(&v[1], stdout); \
950 printf("\n\tposition = "); \
951 type_hex.dump(&v[2], stdout); \
952 printf("\n\tskip = %lu", skip); \
953 printf("\n\tmessage = "); \
954 type_hex.dump(&v[4], stdout); \
955 printf("\n\texpected = "); \
956 type_hex.dump(&v[5], stdout); \
957 printf("\n\tcalculated = "); \
958 type_hex.dump(&d, stdout); \
966 #define DEFVENC(r) DEFxVENC(chacha, CHACHA, r)
967 #define DEFXVENC(r) DEFxVENC(xchacha, XCHACHA, r)
969 CHACHA_VARS(DEFXVENC
)
971 static test_chunk defs
[] = {
972 #define DEFxTAB(base, r) \
973 { #base #r, v_encrypt_##base##_##r, \
974 { &type_hex, &type_hex, &type_hex, &type_ulong, \
975 &type_hex, &type_hex, 0 } },
977 { "chacha" #r "-core", v_core_##r, \
978 { &type_int, &type_hex, &type_hex, 0 } }, \
980 #define DEFXTAB(r) DEFxTAB(xchacha, r)
986 int main(int argc
, char *argv
[])
988 test_run(argc
, argv
, defs
, SRCDIR
"/t/chacha");
994 /*----- That's all, folks -------------------------------------------------*/