/* See LICENSE file for copyright and license details. */
#ifndef SUPPORT_KECCAK
# include "../common.h"

int
main(void)
{
	struct libhashsum_hasher hasher;
	if (!libhashsum_init_keccak_hasher(&hasher, 0, 0, 0, 0)) {
		fprintf(stderr, "expected libhashsum_init_keccak_hasher to fail, but it returned successfully\n");
		return 2;
	}
	if (errno != ENOSYS) {
		perror("expected libhashsum_init_keccak_hasher to set errno to ENOSYS, but got");
		return 2;
	}
	return 0;
}

#else
# include "../common.h"


# define ASSERT(ASSERTION)\
	do {\
		if ((ASSERTION))\
			break;\
		fprintf(stderr, "assertion `%s` at line %i failed\n", #ASSERTION, __LINE__);\
		exit(2);\
	} while (0)


static const char *
hex(const struct libhashsum_hasher *hasher)
{
	static char buffer[4096];
	char *restrict out = buffer;
	unsigned char *restrict in = hasher->hash_output;
	size_t n = hasher->hash_size;
        for (; n--; in++) {
                *out++ = "0123456789abcdef"[(*in >> 4) & 15];
                *out++ = "0123456789abcdef"[(*in >> 0) & 15];
        }
        *out = '\0';
	return buffer;
}


int
main(void)
{
	char buffer[4096];
	struct libhashsum_hasher h1, h2;
	int i;

	for (i = 0; i < 8; i++) {
		if ((i&3) == 3)
			continue;

		ASSERT(!libhashsum_init_keccak_hasher(&h1, (i&1)?0: 1600 - 2 * 224, (i&2)?0: 2 * 224, 224, 1));
		ASSERT(!libhashsum_init_keccak_224_hasher(&h2));
		ASSERT(!h1.finalise_const(&h1, (i&4) ? "testdata" : 0, (i&4) ? 8 : 0, 0));
		ASSERT(!h2.finalise_const(&h2, (i&4) ? "testdata" : 0, (i&4) ? 8 : 0, 0));
		ASSERT(h1.hash_size == h2.hash_size);
		ASSERT(!memcmp(h1.hash_output, h2.hash_output, h2.hash_size));
		ASSERT(h1.algorithm == h2.algorithm);
		ASSERT(!strcmp(h1.algorithm_string, h2.algorithm_string));

		ASSERT(!libhashsum_init_keccak_hasher(&h1, (i&1)?0: 1600 - 2 * 256, (i&2)?0: 2 * 256, 256, 1));
		ASSERT(!libhashsum_init_keccak_256_hasher(&h2));
		ASSERT(!h1.finalise_const(&h1, (i&4) ? "testdata" : 0, (i&4) ? 8 : 0, 0));
		ASSERT(!h2.finalise_const(&h2, (i&4) ? "testdata" : 0, (i&4) ? 8 : 0, 0));
		ASSERT(h1.hash_size == h2.hash_size);
		ASSERT(!memcmp(h1.hash_output, h2.hash_output, h2.hash_size));
		ASSERT(h1.algorithm == h2.algorithm);
		ASSERT(!strcmp(h1.algorithm_string, h2.algorithm_string));

		ASSERT(!libhashsum_init_keccak_hasher(&h1, (i&1)?0: 1600 - 2 * 384, (i&2)?0: 2 * 384, 384, 1));
		ASSERT(!libhashsum_init_keccak_384_hasher(&h2));
		ASSERT(!h1.finalise_const(&h1, (i&4) ? "testdata" : 0, (i&4) ? 8 : 0, 0));
		ASSERT(!h2.finalise_const(&h2, (i&4) ? "testdata" : 0, (i&4) ? 8 : 0, 0));
		ASSERT(h1.hash_size == h2.hash_size);
		ASSERT(!memcmp(h1.hash_output, h2.hash_output, h2.hash_size));
		ASSERT(h1.algorithm == h2.algorithm);
		ASSERT(!strcmp(h1.algorithm_string, h2.algorithm_string));

		ASSERT(!libhashsum_init_keccak_hasher(&h1, (i&1)?0: 1600 - 2 * 512, (i&2)?0: 2 * 512, 512, 1));
		ASSERT(!libhashsum_init_keccak_512_hasher(&h2));
		ASSERT(!h1.finalise_const(&h1, (i&4) ? "testdata" : 0, (i&4) ? 8 : 0, 0));
		ASSERT(!h2.finalise_const(&h2, (i&4) ? "testdata" : 0, (i&4) ? 8 : 0, 0));
		ASSERT(h1.hash_size == h2.hash_size);
		ASSERT(!memcmp(h1.hash_output, h2.hash_output, h2.hash_size));
		ASSERT(h1.algorithm == h2.algorithm);
		ASSERT(!strcmp(h1.algorithm_string, h2.algorithm_string));
	}

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 224, 1));
	ASSERT(!libhashsum_init_keccak_224_hasher(&h2));
	ASSERT(!h1.finalise_const(&h1, NULL, 0, 0));
	ASSERT(!h2.finalise_const(&h2, NULL, 0, 0));
	ASSERT(h1.hash_size == h2.hash_size);
	ASSERT(memcmp(h1.hash_output, h2.hash_output, h2.hash_size));
	ASSERT(h1.algorithm == LIBHASHSUM_KECCAK);
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=224]"));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 256, 1));
	ASSERT(!libhashsum_init_keccak_256_hasher(&h2));
	ASSERT(!h1.finalise_const(&h1, NULL, 0, 0));
	ASSERT(!h2.finalise_const(&h2, NULL, 0, 0));
	ASSERT(h1.hash_size == h2.hash_size);
	ASSERT(memcmp(h1.hash_output, h2.hash_output, h2.hash_size));
	ASSERT(h1.algorithm == LIBHASHSUM_KECCAK);
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=256]"));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 512, 0));
	ASSERT(!h1.finalise_const(&h1, NULL, 0, 0));
	ASSERT(h1.hash_size == 512U / 8U);
	ASSERT(h1.algorithm == LIBHASHSUM_KECCAK);
	ASSERT(strcmp(h1.algorithm_string, h2.algorithm_string));
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=512]"));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 0, 0));
	ASSERT(h1.hash_size == 512U / 8U);
	ASSERT(h1.algorithm == LIBHASHSUM_KECCAK);
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=512]"));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 224, 1));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 512, 1));
	ASSERT(!h1.finalise(&h1, buffer, 0, 0, sizeof(buffer)));
	ASSERT(!h2.finalise(&h2, buffer, 0, 0, sizeof(buffer)));
	ASSERT(!memcmp(h1.hash_output, h2.hash_output, h1.hash_size));

#define Z1\
	"6753e3380c09e385d0339eb6b050a68f66cfd60a73476e6fd6adeb72f5edd7c6"\
	"f04a5d017a19cbe291935855b4860f69df04c98aa78b407a9ba9826f7266ef14"
#define Z2\
	"c3a2fa33f0bfb1cfef8da7875c4967f332c7fc93c050e81fb404f9a91503d601"\
	"0ee16f50b4ed0bc563ba8431668b003d7e2e6f226cb7fa93bb2e132c861fdc21"
#define Z200\
	"f8354bead24cc78c835813c0eec02dcad2b8caf37d79566ea6dc2836f231070d"\
	"cd786213580093a296578518ecc705c461264359e46c51b7c6beef3e3fb21a05"

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 0, 0));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 0, 1));
	ASSERT(!h1.finalise(&h1, buffer, 0, 0, sizeof(buffer)));
	ASSERT(!h2.finalise(&h2, buffer, 0, 0, sizeof(buffer)));
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!strcmp(h2.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!memcmp(h1.hash_output, h2.hash_output, h1.hash_size));
	ASSERT(!strcmp(hex(&h2), Z1));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 0, 0));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 0, 200));
	ASSERT(!h1.finalise(&h1, buffer, 0, 0, sizeof(buffer)));
	ASSERT(!h2.finalise(&h2, buffer, 0, 0, sizeof(buffer)));
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!strcmp(h2.algorithm_string, "Keccak[r=1024,c=576,n=512,z=200]"));
	ASSERT(memcmp(h1.hash_output, h2.hash_output, h1.hash_size));
	ASSERT(!strcmp(hex(&h2), Z200));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 0, 0));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 0, 2));
	ASSERT(!h1.finalise(&h1, buffer, 0, 0, sizeof(buffer)));
	ASSERT(!h2.finalise(&h2, buffer, 0, 0, sizeof(buffer)));
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!strcmp(h2.algorithm_string, "Keccak[r=1024,c=576,n=512,z=2]"));
	ASSERT(memcmp(h1.hash_output, h2.hash_output, h1.hash_size));
	ASSERT(!strcmp(hex(&h2), Z2));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 224, 1));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 512, 1));
	ASSERT(!h1.finalise(&h1, buffer, 0, 0, 0));
	ASSERT(!h2.finalise(&h2, buffer, 0, 0, 0));
	ASSERT(!memcmp(h1.hash_output, h2.hash_output, h1.hash_size));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 0, 0));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 0, 1));
	ASSERT(!h1.finalise(&h1, buffer, 0, 0, 0));
	ASSERT(!h2.finalise(&h2, buffer, 0, 0, 0));
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!strcmp(h2.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!memcmp(h1.hash_output, h2.hash_output, h1.hash_size));
	ASSERT(!strcmp(hex(&h2), Z1));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 0, 0));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 0, 200));
	ASSERT(!h1.finalise(&h1, buffer, 0, 0, 0));
	ASSERT(!h2.finalise(&h2, buffer, 0, 0, 0));
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!strcmp(h2.algorithm_string, "Keccak[r=1024,c=576,n=512,z=200]"));
	ASSERT(memcmp(h1.hash_output, h2.hash_output, h1.hash_size));
	ASSERT(!strcmp(hex(&h2), Z200));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 0, 0));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 0, 2));
	ASSERT(!h1.finalise(&h1, buffer, 0, 0, 0));
	ASSERT(!h2.finalise(&h2, buffer, 0, 0, 0));
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!strcmp(h2.algorithm_string, "Keccak[r=1024,c=576,n=512,z=2]"));
	ASSERT(memcmp(h1.hash_output, h2.hash_output, h1.hash_size));
	ASSERT(!strcmp(hex(&h2), Z2));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 224, 1));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 512, 1));
	ASSERT(!h1.finalise_const(&h1, NULL, 0, 0));
	ASSERT(!h2.finalise_const(&h2, NULL, 0, 0));
	ASSERT(!memcmp(h1.hash_output, h2.hash_output, h1.hash_size));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 0, 0));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 0, 1));
	ASSERT(!h1.finalise_const(&h1, NULL, 0, 0));
	ASSERT(!h2.finalise_const(&h2, NULL, 0, 0));
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!strcmp(h2.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!memcmp(h1.hash_output, h2.hash_output, h1.hash_size));
	ASSERT(!strcmp(hex(&h2), Z1));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 0, 0));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 0, 200));
	ASSERT(!h1.finalise_const(&h1, NULL, 0, 0));
	ASSERT(!h2.finalise_const(&h2, NULL, 0, 0));
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!strcmp(h2.algorithm_string, "Keccak[r=1024,c=576,n=512,z=200]"));
	ASSERT(memcmp(h1.hash_output, h2.hash_output, h1.hash_size));
	ASSERT(!strcmp(hex(&h2), Z200));

	ASSERT(!libhashsum_init_keccak_hasher(&h1, 0, 0, 0, 0));
	ASSERT(!libhashsum_init_keccak_hasher(&h2, 0, 0, 0, 2));
	ASSERT(!h1.finalise_const(&h1, NULL, 0, 0));
	ASSERT(!h2.finalise_const(&h2, NULL, 0, 0));
	ASSERT(!strcmp(h1.algorithm_string, "Keccak[r=1024,c=576,n=512]"));
	ASSERT(!strcmp(h2.algorithm_string, "Keccak[r=1024,c=576,n=512,z=2]"));
	ASSERT(memcmp(h1.hash_output, h2.hash_output, h1.hash_size));
	ASSERT(!strcmp(hex(&h2), Z2));

#undef Z1
#undef Z2
#undef Z200

	return 0;
}


#endif