105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
#include "api.h"
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#include "randombytes.h"
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#include <stdio.h>
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#include <string.h>
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#define NTESTS 15
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#define MLEN 32
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/* allocate a bit more for all keys and messages and
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* make sure it is not touched by the implementations.
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*/
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static void write_canary(unsigned char *d) {
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*((uint64_t *)d) = 0x0123456789ABCDEF;
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}
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static int check_canary(const unsigned char *d) {
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if (*(uint64_t *)d != 0x0123456789ABCDEF) {
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return -1;
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}
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return 0;
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}
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static int test_sign(void) {
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unsigned char pk[CRYPTO_PUBLICKEYBYTES + 16];
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unsigned char sk[CRYPTO_SECRETKEYBYTES + 16];
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unsigned char sm[MLEN + CRYPTO_BYTES + 16];
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unsigned char m[MLEN + 16];
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unsigned long long mlen;
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unsigned long long smlen;
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int i;
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write_canary(pk);
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write_canary(pk + sizeof(pk) - 8);
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write_canary(sk);
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write_canary(sk + sizeof(sk) - 8);
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write_canary(sm);
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write_canary(sm + sizeof(sm) - 8);
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write_canary(m);
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write_canary(m + sizeof(m) - 8);
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for (i = 0; i < NTESTS; i++) {
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crypto_sign_keypair(pk + 8, sk + 8);
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randombytes(m + 8, MLEN);
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crypto_sign(sm + 8, &smlen, m + 8, MLEN, sk + 8);
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// By relying on m == sm we prevent having to allocate CRYPTO_BYTES
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// twice
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if (crypto_sign_open(sm + 8, &mlen, sm + 8, smlen, pk + 8)) {
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printf("ERROR Signature did not verify correctly!\n");
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return 1;
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}
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if (check_canary(pk) || check_canary(pk + sizeof(pk) - 8) ||
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check_canary(sk) || check_canary(sk + sizeof(sk) - 8) ||
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check_canary(sm) || check_canary(sm + sizeof(sm) - 8) ||
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check_canary(m) || check_canary(m + sizeof(m) - 8)) {
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printf("ERROR canary overwritten\n");
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return 1;
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}
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}
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return 0;
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}
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static int test_wrong_pk(void) {
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unsigned char pk[CRYPTO_PUBLICKEYBYTES];
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unsigned char pk2[CRYPTO_PUBLICKEYBYTES];
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unsigned char sk[CRYPTO_SECRETKEYBYTES];
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unsigned char sm[MLEN + CRYPTO_BYTES];
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unsigned char m[MLEN];
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unsigned long long mlen;
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unsigned long long smlen;
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int i;
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for (i = 0; i < NTESTS; i++) {
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crypto_sign_keypair(pk2, sk);
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crypto_sign_keypair(pk, sk);
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randombytes(m, MLEN);
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crypto_sign(sm, &smlen, m, MLEN, sk);
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// By relying on m == sm we prevent having to allocate CRYPTO_BYTES
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// twice
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if (!crypto_sign_open(sm, &mlen, sm, smlen, pk2)) {
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printf("ERROR Signature did verify correctly under wrong public "
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"key!\n");
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return 1;
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}
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}
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return 0;
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}
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int main(void) {
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int result = 0;
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result += test_sign();
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result += test_wrong_pk();
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return result;
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}
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