libsodium/test/default/generichash2.c

#define TEST_NAME "generichash2"
#include "cmptest.h"

int main(void)
{
#define MAXLEN 64
    crypto_generichash_state st;
    unsigned char in[MAXLEN], out[crypto_generichash_BYTES_MAX],
        k[crypto_generichash_KEYBYTES_MAX];
    size_t h, i, j;

    for (h = 0; h < crypto_generichash_KEYBYTES_MAX; ++h)
        k[h] = h;

    for (i = 0; i < MAXLEN; ++i) {
        in[i] = i;
        crypto_generichash_init(&st, k, 1 + i % crypto_generichash_KEYBYTES_MAX,
                                1 + i % crypto_generichash_BYTES_MAX);
        crypto_generichash_update(&st, in, i);
        crypto_generichash_update(&st, in, i);
        crypto_generichash_update(&st, in, i);
        crypto_generichash_final(&st, out,
                                 1 + i % crypto_generichash_BYTES_MAX);
        for (j = 0; j < 1 + i % crypto_generichash_BYTES_MAX; ++j) {
            printf("%02x", (unsigned int)out[j]);
        }
        printf("\n");
    }
    return 0;
}