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Add KangarooTwelve XOF functions.
KangarooTwelve 128bits and KangarooTwelve 256 bits. https://keccak.team/files/TurboSHAKE.pdf https://www.rfc-editor.org/rfc/rfc9861.txt https://datatracker.ietf.org/doc/html/rfc9861
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‎doc/crypt.tex‎

Lines changed: 15 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3143,6 +3143,21 @@ \subsection{TurboSHAKE}
31433143
The init function \code{turbo\_shake\_init()} is implemented as a macro which calls \code{sha3\_shake\_init()}.
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31453145

3146+
\subsection{KangarooTwelve}
3147+
Another variation of SHA3 SHAKE is KangarooTwelve, which has been specified in \href{https://datatracker.ietf.org/doc/rfc9861/}{\texttt{RFC 9861}}.
3148+
3149+
The API works equivalent to the one of SHA3 SHAKE, where the APIs only have a different name. Additionally, KangarooTwelve supports customization. You can append any or none customization bytes after all input bytes and before squeezing any output digest bytes.
3150+
3151+
\begin{small}
3152+
\begin{verbatim}
3153+
int kangaroo_twelve_init(hash_state *md, int num);
3154+
int kangaroo_twelve_process(hash_state *md, const unsigned char *in, unsigned long inlen);
3155+
int kangaroo_twelve_customization(hash_state *md, const unsigned char *in, unsigned long inlen);
3156+
int kangaroo_twelve_done(hash_state *md, unsigned char *out, unsigned long outlen);
3157+
\end{verbatim}
3158+
\end{small}
3159+
3160+
31463161
\mysection{Extended Tiger API}
31473162

31483163
The Tiger and Tiger2 hash algorithms \url{http://www.cs.technion.ac.il/~biham/Reports/Tiger/} specify the possibility to run the algorithm with

‎src/hashes/sha3.c‎

Lines changed: 148 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -416,4 +416,152 @@ int sha3_shake_memory(int num, const unsigned char *in, unsigned long inlen, uns
416416
}
417417
#endif
418418

419+
#ifdef LTC_KANGAROO_TWELVE
420+
421+
static const unsigned char kangaroo_twelve_filler[] = { 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
422+
423+
int kangaroo_twelve_init(hash_state *md, int num)
424+
{
425+
int err;
426+
427+
LTC_ARGCHK(md != NULL);
428+
LTC_ARGCHK(num == 128 || num == 256);
429+
430+
if ((err = sha3_shake_init((hash_state*)&md->kt.outer, num)) != CRYPT_OK) return err;
431+
if ((err = sha3_shake_init((hash_state*)&md->kt.inner, num)) != CRYPT_OK) return err;
432+
md->kt.blocks_count = 0;
433+
md->kt.customization_len = 0;
434+
md->kt.remaining = 8 * 1024;
435+
md->kt.phase = 0;
436+
md->kt.finished = 0;
437+
return CRYPT_OK;
438+
}
439+
440+
static LTC_INLINE int s_kangaroo_twelve_process(hash_state *md, const unsigned char *in, unsigned long inlen)
441+
{
442+
unsigned long rem;
443+
unsigned long amount;
444+
int err;
445+
int variant;
446+
int digest_len;
447+
unsigned char digest_buf[64];
448+
449+
LTC_ARGCHK(md != NULL);
450+
LTC_ARGCHK(in != NULL || inlen == 0);
451+
452+
if (md->kt.phase == 0)
453+
{
454+
rem = md->kt.remaining;
455+
amount = rem < inlen ? rem : inlen;
456+
md->kt.remaining -= amount;
457+
if ((err = turbo_shake_process((hash_state*)&md->kt.outer, in, amount)) != CRYPT_OK) return err;
458+
in += amount;
459+
inlen -= amount;
460+
if (md->kt.remaining == 0 && inlen != 0)
461+
{
462+
md->kt.remaining = 8 * 1024;
463+
md->kt.phase = 1;
464+
md->kt.blocks_count += 1;
465+
if ((err = turbo_shake_process((hash_state*)&md->kt.outer, kangaroo_twelve_filler, sizeof(kangaroo_twelve_filler))) != CRYPT_OK) return err;
466+
}
467+
}
468+
if (md->kt.phase == 1)
469+
{
470+
do
471+
{
472+
rem = md->kt.remaining;
473+
amount = rem < inlen ? rem : inlen;
474+
md->kt.remaining -= amount;
475+
if ((err = turbo_shake_process((hash_state*)&md->kt.inner, in, amount)) != CRYPT_OK) return err;
476+
in += amount;
477+
inlen -= amount;
478+
if (md->kt.remaining == 0 && inlen != 0)
479+
{
480+
md->kt.remaining = 8 * 1024;
481+
md->kt.blocks_count += 1;
482+
assert(md->kt.outer.capacity_words == 4 || md->kt.outer.capacity_words == 8);
483+
variant = md->kt.outer.capacity_words == 4 ? 128 : 256;
484+
digest_len = variant == 128 ? 32 : 64;
485+
if ((err = s_sha3_shake_done((hash_state*)&md->kt.inner, digest_buf, digest_len, 0x0b, s_keccak_turbo_f)) != CRYPT_OK) return err;
486+
if ((err = turbo_shake_init((hash_state*)&md->kt.inner, variant)) != CRYPT_OK) return err;
487+
if ((err = turbo_shake_process((hash_state*)&md->kt.outer, digest_buf, digest_len)) != CRYPT_OK) return err;
488+
}
489+
} while (inlen != 0);
490+
}
491+
return CRYPT_OK;
492+
}
493+
494+
int kangaroo_twelve_process(hash_state *md, const unsigned char *in, unsigned long inlen)
495+
{
496+
LTC_ARGCHK(md != NULL);
497+
LTC_ARGCHK(in != NULL || inlen == 0);
498+
LTC_ARGCHK(md->kt.customization_len == 0);
499+
LTC_ARGCHK(md->kt.finished == 0);
500+
501+
return s_kangaroo_twelve_process(md, in, inlen);
502+
}
503+
504+
int kangaroo_twelve_customization(hash_state *md, const unsigned char *in, unsigned long inlen)
505+
{
506+
LTC_ARGCHK(md != NULL);
507+
LTC_ARGCHK(in != NULL || inlen == 0);
508+
LTC_ARGCHK(md->kt.finished == 0);
509+
510+
md->kt.customization_len += inlen;
511+
return s_kangaroo_twelve_process(md, in, inlen);
512+
}
513+
514+
int kangaroo_twelve_done(hash_state *md, unsigned char *out, unsigned long outlen)
515+
{
516+
int couner_len;
517+
unsigned char couner_buf[sizeof(unsigned long) + 1];
518+
int err;
519+
int variant;
520+
int digest_len;
521+
unsigned char digest_buf[64];
522+
unsigned char ffff[2];
523+
unsigned char domain;
524+
525+
LTC_ARGCHK(md != NULL);
526+
LTC_ARGCHK(out != NULL || outlen == 0);
527+
528+
if (md->kt.finished == 0)
529+
{
530+
md->kt.finished = 1;
531+
couner_len = 0;
532+
while (md->kt.customization_len != 0)
533+
{
534+
couner_buf[LTC_ARRAY_SIZE(couner_buf) - 1 - 1 - couner_len] = md->kt.customization_len & 0xff;
535+
md->kt.customization_len >>= 8;
536+
++couner_len;
537+
}
538+
couner_buf[LTC_ARRAY_SIZE(couner_buf) - 1] = couner_len;
539+
if ((err = s_kangaroo_twelve_process(md, &couner_buf[LTC_ARRAY_SIZE(couner_buf) - 1 - couner_len], couner_len + 1)) != CRYPT_OK) return err;
540+
if(md->kt.phase != 0)
541+
{
542+
assert(md->kt.outer.capacity_words == 4 || md->kt.outer.capacity_words == 8);
543+
variant = md->kt.outer.capacity_words == 4 ? 128 : 256;
544+
digest_len = variant == 128 ? 32 : 64;
545+
if ((err = s_sha3_shake_done((hash_state*)&md->kt.inner, digest_buf, digest_len, 0x0b, s_keccak_turbo_f)) != CRYPT_OK) return err;
546+
if ((err = turbo_shake_process((hash_state*)&md->kt.outer, digest_buf, digest_len)) != CRYPT_OK) return err;
547+
couner_len = 0;
548+
while (md->kt.blocks_count != 0)
549+
{
550+
couner_buf[LTC_ARRAY_SIZE(couner_buf) - 1 - 1 - couner_len] = md->kt.blocks_count & 0xff;
551+
md->kt.blocks_count >>= 8;
552+
++couner_len;
553+
}
554+
couner_buf[LTC_ARRAY_SIZE(couner_buf) - 1] = couner_len;
555+
if ((err = turbo_shake_process((hash_state*)&md->kt.outer, &couner_buf[LTC_ARRAY_SIZE(couner_buf) - 1 - couner_len], couner_len + 1)) != CRYPT_OK) return err;
556+
ffff[0] = 0xff;
557+
ffff[1] = 0xff;
558+
if ((err = turbo_shake_process((hash_state*)&md->kt.outer, ffff, LTC_ARRAY_SIZE(ffff))) != CRYPT_OK) return err;
559+
}
560+
}
561+
domain = md->kt.phase == 0 ? 0x07 : 0x06;
562+
return s_sha3_shake_done(md, out, outlen, domain, s_keccak_turbo_f);
563+
}
564+
565+
#endif
566+
419567
#endif

‎src/hashes/sha3_test.c‎

Lines changed: 140 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -388,7 +388,7 @@ int sha3_shake_test(void)
388388
#endif
389389
}
390390

391-
#if defined LTC_TURBO_SHAKE
391+
#if defined LTC_TURBO_SHAKE || defined LTC_KANGAROO_TWELVE
392392
static LTC_INLINE int s_turbo_shake_generate_ptn(unsigned char* buffer, long offset, long amount)
393393
{
394394
long i;
@@ -509,6 +509,145 @@ int turbo_shake_test(void)
509509
}
510510
#endif
511511

512+
#ifdef LTC_KANGAROO_TWELVE
513+
typedef struct kangaroo_twelve_test_s {
514+
int bits_count, is_ptn;
515+
unsigned long input_bytes_count, customization_bytes_count, skip_digest_bytes, digest_bytes_count;
516+
const char *expected_digest_hex;
517+
} kangaroo_twelve_test_t;
518+
519+
static LTC_INLINE int s_kangaroo_twelve_test_one(const kangaroo_twelve_test_t *testcase, int counter)
520+
{
521+
int err;
522+
hash_state md;
523+
unsigned long offset;
524+
unsigned long rem;
525+
unsigned long count;
526+
unsigned char input[1024];
527+
unsigned char digest[64];
528+
char const *expected_hex;
529+
unsigned char expected_digest_bin[sizeof(digest)];
530+
unsigned long decoded;
531+
532+
LTC_ARGCHK(testcase != NULL);
533+
LTC_ARGCHK(testcase->bits_count == 128 || testcase->bits_count == 256);
534+
LTC_ARGCHK(testcase->is_ptn == 0 || testcase->is_ptn == 1);
535+
LTC_ARGCHK(testcase->digest_bytes_count >= 1);
536+
LTC_ARGCHK(testcase->expected_digest_hex && testcase->expected_digest_hex[0] != '\0');
537+
LTC_ARGCHK(counter >= 0);
538+
539+
if ((err = kangaroo_twelve_init(&md, testcase->bits_count)) != CRYPT_OK) return err;
540+
offset = 0;
541+
rem = testcase->input_bytes_count;
542+
do
543+
{
544+
count = rem < sizeof(input) ? rem : sizeof(input);
545+
if (testcase->is_ptn)
546+
{
547+
if ((err = s_turbo_shake_generate_ptn(input, offset, count)) != CRYPT_OK) return err;
548+
}
549+
else
550+
{
551+
XMEMSET(input, 0xff, count);
552+
}
553+
if ((err = kangaroo_twelve_process(&md, input, count)) != CRYPT_OK) return err;
554+
offset += count;
555+
rem -= count;
556+
}while(rem != 0);
557+
offset = 0;
558+
rem = testcase->customization_bytes_count;
559+
do
560+
{
561+
count = rem < sizeof(input) ? rem : sizeof(input);
562+
if ((err = s_turbo_shake_generate_ptn(input, offset, count)) != CRYPT_OK) return err;
563+
if ((err = kangaroo_twelve_customization(&md, input, count)) != CRYPT_OK) return err;
564+
offset += count;
565+
rem -= count;
566+
}while(rem != 0);
567+
rem = testcase->skip_digest_bytes;
568+
do
569+
{
570+
count = rem < sizeof(digest) ? rem : sizeof(digest);
571+
if ((err = kangaroo_twelve_done(&md, digest, count)) != CRYPT_OK) return err;
572+
rem -= count;
573+
}while(rem != 0);
574+
rem = testcase->digest_bytes_count;
575+
expected_hex = testcase->expected_digest_hex;
576+
do
577+
{
578+
count = rem < sizeof(digest) ? rem : sizeof(digest);
579+
decoded = count;
580+
if ((err = base16_decode(expected_hex, count * 2, expected_digest_bin, &decoded)) != CRYPT_OK) return err;
581+
if (decoded != (unsigned long)count) return CRYPT_ERROR;
582+
if ((err = kangaroo_twelve_done(&md, digest, count)) != CRYPT_OK) return err;
583+
LTC_COMPARE_TESTVECTOR(digest, count, expected_digest_bin, count, "KangarooTwelve", counter);
584+
rem -= count;
585+
expected_hex += count * 2;
586+
}while(rem != 0);
587+
return CRYPT_OK;
588+
}
589+
#endif
590+
591+
#ifdef LTC_KANGAROO_TWELVE
592+
int kangaroo_twelve_test(void)
593+
{
594+
#ifndef LTC_TEST
595+
return CRYPT_NOP;
596+
#else
597+
int counter;
598+
int err;
599+
600+
/* https://datatracker.ietf.org/doc/html/rfc9861#name-test-vectors */
601+
/* https://www.rfc-editor.org/rfc/rfc9861.txt */
602+
603+
const kangaroo_twelve_test_t testcases[] = {
604+
{ 128, 1, 0, 0, 0, 32, "1ac2d450fc3b4205d19da7bfca1b37513c0803577ac7167f06fe2ce1f0ef39e5" },
605+
{ 128, 1, 0, 0, 0, 64, "1ac2d450fc3b4205d19da7bfca1b37513c0803577ac7167f06fe2ce1f0ef39e54269c056b8c82e48276038b6d292966cc07a3d4645272e31ff38508139eb0a71" },
606+
{ 128, 1, 0, 0, 10000, 32, "e8dc563642f7228c84684c898405d3a834799158c079b12880277a1d28e2ff6d" },
607+
{ 128, 1, 1, 0, 0, 32, "2bda92450e8b147f8a7cb629e784a058efca7cf7d8218e02d345dfaa65244a1f" },
608+
{ 128, 1, 17, 0, 0, 32, "6bf75fa2239198db4772e36478f8e19b0f371205f6a9a93a273f51df37122888" },
609+
{ 128, 1, 17*17, 0, 0, 32, "0c315ebcdedbf61426de7dcf8fb725d1e74675d7f5327a5067f367b108ecb67c" },
610+
{ 128, 1, 17*17*17, 0, 0, 32, "cb552e2ec77d9910701d578b457ddf772c12e322e4ee7fe417f92c758f0d59d0" },
611+
{ 128, 1, 17*17*17*17, 0, 0, 32, "8701045e22205345ff4dda05555cbb5c3af1a771c2b89baef37db43d9998b9fe" },
612+
{ 128, 1, 17*17*17*17*17, 0, 0, 32, "844d610933b1b9963cbdeb5ae3b6b05cc7cbd67ceedf883eb678a0a8e0371682" },
613+
{ 128, 1, 17*17*17*17*17*17, 0, 0, 32, "3c390782a8a4e89fa6367f72feaaf13255c8d95878481d3cd8ce85f58e880af8" },
614+
{ 128, 1, 0, 1, 0, 32, "fab658db63e94a246188bf7af69a133045f46ee984c56e3c3328caaf1aa1a583" },
615+
{ 128, 0, 1, 41, 0, 32, "d848c5068ced736f4462159b9867fd4c20b808acc3d5bc48e0b06ba0a3762ec4" },
616+
{ 128, 0, 3, 41*41, 0, 32, "c389e5009ae57120854c2e8c64670ac01358cf4c1baf89447a724234dc7ced74" },
617+
{ 128, 0, 7, 41*41*41, 0, 32, "75d2f86a2e644566726b4fbcfc5657b9dbcf070c7b0dca06450ab291d7443bcf" },
618+
{ 128, 1, 8191, 0, 0, 32, "1b577636f723643e990cc7d6a659837436fd6a103626600eb8301cd1dbe553d6" },
619+
{ 128, 1, 8192, 0, 0, 32, "48f256f6772f9edfb6a8b661ec92dc93b95ebd05a08a17b39ae3490870c926c3" },
620+
{ 128, 1, 8192, 8189, 0, 32, "3ed12f70fb05ddb58689510ab3e4d23c6c6033849aa01e1d8c220a297fedcd0b" },
621+
{ 128, 1, 8192, 8190, 0, 32, "6a7c1b6a5cd0d8c9ca943a4a216cc64604559a2ea45f78570a15253d67ba00ae" },
622+
{ 256, 1, 0, 0, 0, 64, "b23d2e9cea9f4904e02bec06817fc10ce38ce8e93ef4c89e6537076af8646404e3e8b68107b8833a5d30490aa33482353fd4adc7148ecb782855003aaebde4a9" },
623+
{ 256, 1, 0, 0, 0, 128, "b23d2e9cea9f4904e02bec06817fc10ce38ce8e93ef4c89e6537076af8646404e3e8b68107b8833a5d30490aa33482353fd4adc7148ecb782855003aaebde4a9b0925319d8ea1e121a609821ec19efea89e6d08daee1662b69c840289f188ba860f55760b61f82114c030c97e5178449608ccd2cd2d919fc7829ff69931ac4d0" },
624+
{ 256, 1, 0, 0, 10000, 64, "ad4a1d718cf950506709a4c33396139b4449041fc79a05d68da35f1e453522e056c64fe94958e7085f2964888259b9932752f3ccd855288efee5fcbb8b563069" },
625+
{ 256, 1, 1, 0, 0, 64, "0d005a194085360217128cf17f91e1f71314efa5564539d444912e3437efa17f82db6f6ffe76e781eaa068bce01f2bbf81eacb983d7230f2fb02834a21b1ddd0" },
626+
{ 256, 1, 17, 0, 0, 64, "1ba3c02b1fc514474f06c8979978a9056c8483f4a1b63d0dccefe3a28a2f323e1cdcca40ebf006ac76ef0397152346837b1277d3e7faa9c9653b19075098527b" },
627+
{ 256, 1, 17*17, 0, 0, 64, "de8ccbc63e0f133ebb4416814d4c66f691bbf8b6a61ec0a7700f836b086cb029d54f12ac7159472c72db118c35b4e6aa213c6562caaa9dcc518959e69b10f3ba" },
628+
{ 256, 1, 17*17*17, 0, 0, 64, "647efb49fe9d717500171b41e7f11bd491544443209997ce1c2530d15eb1ffbb598935ef954528ffc152b1e4d731ee2683680674365cd191d562bae753b84aa5" },
629+
{ 256, 1, 17*17*17*17, 0, 0, 64, "b06275d284cd1cf205bcbe57dccd3ec1ff6686e3ed15776383e1f2fa3c6ac8f08bf8a162829db1a44b2a43ff83dd89c3cf1ceb61ede659766d5ccf817a62ba8d" },
630+
{ 256, 1, 17*17*17*17*17, 0, 0, 64, "9473831d76a4c7bf77ace45b59f1458b1673d64bcd877a7c66b2664aa6dd149e60eab71b5c2bab858c074ded81ddce2b4022b5215935c0d4d19bf511aeeb0772" },
631+
{ 256, 1, 17*17*17*17*17*17, 0, 0, 64, "0652b740d78c5e1f7c8dcc1777097382768b7ff38f9a7a20f29f413bb1b3045b31a5578f568f911e09cf44746da84224a5266e96a4a535e871324e4f9c7004da" },
632+
{ 256, 1, 0, 1, 0, 64, "9280f5cc39b54a5a594ec63de0bb99371e4609d44bf845c2f5b8c316d72b159811f748f23e3fabbe5c3226ec96c62186df2d33e9df74c5069ceecbb4dd10eff6" },
633+
{ 256, 0, 1, 41, 0, 64, "47ef96dd616f200937aa7847e34ec2feae8087e3761dc0f8c1a154f51dc9ccf845d7adbce57ff64b639722c6a1672e3bf5372d87e00aff89be97240756998853" },
634+
{ 256, 0, 3, 41*41, 0, 64, "3b48667a5051c5966c53c5d42b95de451e05584e7806e2fb765eda959074172cb438a9e91dde337c98e9c41bed94c4e0aef431d0b64ef2324f7932caa6f54969" },
635+
{ 256, 0, 7, 41*41*41, 0, 64, "e0911cc00025e1540831e266d94add9b98712142b80d2629e643aac4efaf5a3a30a88cbf4ac2a91a2432743054fbcc9897670e86ba8cec2fc2ace9c966369724" },
636+
{ 256, 1, 8191, 0, 0, 64, "3081434d93a4108d8d8a3305b89682cebedc7ca4ea8a3ce869fbb73cbe4a58eef6f24de38ffc170514c70e7ab2d01f03812616e863d769afb3753193ba045b20" },
637+
{ 256, 1, 8192, 0, 0, 64, "c6ee8e2ad3200c018ac87aaa031cdac22121b412d07dc6e0dccbb53423747e9a1c18834d99df596cf0cf4b8dfafb7bf02d139d0c9035725adc1a01b7230a41fa" },
638+
{ 256, 1, 8192, 8189, 0, 64, "74e47879f10a9c5d11bd2da7e194fe57e86378bf3c3f7448eff3c576a0f18c5caae0999979512090a7f348af4260d4de3c37f1ecaf8d2c2c96c1d16c64b12496" },
639+
{ 256, 1, 8192, 8190, 0, 64, "f4b5908b929ffe01e0f79ec2f21243d41a396b2e7303a6af1d6399cd6c7a0a2dd7c4f607e8277f9c9b1cb4ab9ddc59d4b92d1fc7558441f1832c3279a4241b8b" },
640+
};
641+
for (counter = 0; counter < (int)LTC_ARRAY_SIZE(testcases); counter++) {
642+
if ((err = s_kangaroo_twelve_test_one(&testcases[counter], counter)) != CRYPT_OK) {
643+
return err;
644+
}
645+
}
646+
return CRYPT_OK;
647+
#endif
648+
}
649+
#endif
650+
512651
#endif
513652

514653
#ifdef LTC_KECCAK

‎src/headers/tomcrypt_custom.h‎

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -259,6 +259,7 @@
259259
#define LTC_SHA3
260260
#define LTC_KECCAK
261261
#define LTC_TURBO_SHAKE
262+
#define LTC_KANGAROO_TWELVE
262263
#define LTC_SHA512
263264
#define LTC_SHA512_256
264265
#define LTC_SHA512_224
@@ -713,6 +714,10 @@
713714
#error LTC_TURBO_SHAKE requires LTC_SHA3
714715
#endif
715716

717+
#if defined(LTC_KANGAROO_TWELVE) && !defined(LTC_TURBO_SHAKE)
718+
#error LTC_KANGAROO_TWELVE requires LTC_TURBO_SHAKE
719+
#endif
720+
716721
#if defined(LTC_NO_MATH) && (defined(LTM_DESC) || defined(TFM_DESC) || defined(GMP_DESC))
717722
#error LTC_NO_MATH defined, but also a math descriptor
718723
#endif

‎src/headers/tomcrypt_hash.h‎

Lines changed: 23 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -14,6 +14,18 @@ struct sha3_state {
1414
};
1515
#endif
1616

17+
#ifdef LTC_KANGAROO_TWELVE
18+
struct kangaroo_twelve_state {
19+
struct sha3_state outer;
20+
struct sha3_state inner;
21+
unsigned long blocks_count;
22+
unsigned long customization_len;
23+
unsigned short remaining; /* bytes out of 8kB block */
24+
unsigned char phase; /* 0 -- initial, 1 -- additional */
25+
unsigned char finished; /* 0 -- false, 1 -- true */
26+
};
27+
#endif
28+
1729
#ifdef LTC_SHA512
1830
struct sha512_state {
1931
ulong64 length, state[8];
@@ -152,6 +164,9 @@ typedef union Hash_state {
152164
#if defined(LTC_SHA3) || defined(LTC_KECCAK)
153165
struct sha3_state sha3;
154166
#endif
167+
#ifdef LTC_KANGAROO_TWELVE
168+
struct kangaroo_twelve_state kt;
169+
#endif
155170
#ifdef LTC_SHA512
156171
struct sha512_state sha512;
157172
#endif
@@ -309,6 +324,14 @@ int turbo_shake_done(hash_state *md, unsigned char *out, unsigned long outlen);
309324
int turbo_shake_test(void);
310325
#endif
311326

327+
#ifdef LTC_KANGAROO_TWELVE
328+
int kangaroo_twelve_init(hash_state *md, int num);
329+
int kangaroo_twelve_process(hash_state *md, const unsigned char *in, unsigned long inlen);
330+
int kangaroo_twelve_customization(hash_state *md, const unsigned char *in, unsigned long inlen);
331+
int kangaroo_twelve_done(hash_state *md, unsigned char *out, unsigned long outlen);
332+
int kangaroo_twelve_test(void);
333+
#endif
334+
312335
#ifdef LTC_SHA512
313336
int sha512_init(hash_state * md);
314337
int sha512_process(hash_state * md, const unsigned char *in, unsigned long inlen);

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