libsodium/test/default/generichash3.c

#define TEST_NAME "generichash3"
#include "cmptest.h"

int main(void)
{
#define MAXLEN 64
    crypto_generichash_blake2b_state st;
    unsigned char salt[crypto_generichash_blake2b_SALTBYTES] = {
        '5', 'b', '6', 'b', '4', '1', 'e', 'd', '9', 'b', '3', '4', '3', 'f', 'e', '0'
    };
    unsigned char personal[crypto_generichash_blake2b_PERSONALBYTES] = {
        '5', '1', '2', '6', 'f', 'b', '2', 'a', '3', '7', '4', '0', '0', 'd', '2', 'a'
    };    
    unsigned char in[MAXLEN], out[crypto_generichash_blake2b_BYTES_MAX], k[crypto_generichash_blake2b_KEYBYTES_MAX];
    size_t h,i,j;

    for(h = 0; h < crypto_generichash_blake2b_KEYBYTES_MAX; ++h) k[h] = h;

    for(i = 0; i < MAXLEN; ++i) {
        in[i]=i;
        crypto_generichash_blake2b_init_salt_personal(&st, k, 1 + i % crypto_generichash_blake2b_KEYBYTES_MAX,
                                                      1 + i % crypto_generichash_blake2b_BYTES_MAX,
                                                      salt, personal);
        crypto_generichash_blake2b_update(&st, in, i);
        crypto_generichash_blake2b_final(&st, out, 1 + i % crypto_generichash_blake2b_BYTES_MAX);
        for (j = 0;j < 1 + i % crypto_generichash_blake2b_BYTES_MAX;++j) {
            printf("%02x",(unsigned int) out[j]);
        }
        printf("\n");
    }
    return 0;
}