FreeBSD/Linux Kernel Cross Reference
sys/contrib/libsodium/test/default/auth7.c

     
     #define TEST_NAME "auth7"
     #include "cmptest.h"
     
     static unsigned char key[32];
     static unsigned char c[600];
     static unsigned char a[64];
     
     int
    main(void)
    {
        size_t clen;
    
        for (clen = 0; clen < sizeof c; ++clen) {
            crypto_auth_keygen(key);
            randombytes_buf(c, clen);
            crypto_auth_hmacsha512(a, c, clen, key);
            if (crypto_auth_hmacsha512_verify(a, c, clen, key) != 0) {
                printf("fail %u\n", (unsigned int) clen);
                return 100;
            }
            if (clen > 0) {
                c[(size_t) rand() % clen] += 1 + (rand() % 255);
                if (crypto_auth_hmacsha512_verify(a, c, clen, key) == 0) {
                    printf("forgery %u\n", (unsigned int) clen);
                    return 100;
                }
                a[rand() % sizeof a] += 1 + (rand() % 255);
                if (crypto_auth_hmacsha512_verify(a, c, clen, key) == 0) {
                    printf("forgery %u\n", (unsigned int) clen);
                    return 100;
                }
            }
        }
        return 0;
    }

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