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#include <string.h>
#include "hmac.h"
#include "sha256.h"
struct midstate
{
uint32 H[8];
};
static void extract(const void* statep, void* midstatep)
{
const SHA256_ctx* ctx = statep;
struct midstate* mid = midstatep;
memcpy(mid->H, ctx->H, 8 * sizeof(mid->H[0]));
}
static void inject(void* statep, const void* midstatep)
{
SHA256_ctx* ctx = statep;
const struct midstate* mid = midstatep;
memcpy(ctx->H, mid->H, 8 * sizeof(mid->H[0]));
ctx->bytes = 64;
}
const struct hmac_control_block hmac_sha256 = {
.state_size = sizeof(SHA256_ctx),
.block_size = 64,
.digest_size = SHA256_DIGEST_LENGTH,
.midstate_size = sizeof(struct midstate),
.init = (hmac_init_fn)SHA256_init,
.update = (hmac_update_fn)SHA256_update,
.finalize = (hmac_finalize_fn)SHA256_final,
.extract = extract,
.inject = inject,
};
#ifdef SELFTEST_MAIN
#include "obuf.h"
#include "str.h"
static void test_hmac(const char* key, const char* data)
{
const str key_str = { (char*)key, strlen(key), 0 };
const str data_str = { (char*)data, strlen(data), 0 };
unsigned char digest[SHA256_DIGEST_LENGTH];
unsigned i;
hmac(&hmac_sha256, &key_str, &data_str, digest);
for (i = 0; i < sizeof digest; ++i)
obuf_putxw(&outbuf, digest[i], 2, '0');
obuf_endl(&outbuf);
}
MAIN
{
test_hmac("\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b",
"Hi There");
test_hmac("Jefe", "what do ya want for nothing?");
test_hmac("\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa",
"\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd"
"\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd"
"\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd"
"\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd"
"\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd\xdd");
}
#endif
#ifdef SELFTEST_EXP
492ce020fe2534a5789dc3848806c78f4f6711397f08e7e7a12ca5a4483c8aa6
5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b964ec3843
7dda3cc169743a6484649f94f0eda0f9f2ff496a9733fb796ed5adb40a44c3c1
#endif
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