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Merge branch 'randomciphertext' into newhope

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Matthias J. Kannwischer 2019-05-09 07:46:24 +02:00
commit de30a2bdcd
1 changed files with 2 additions and 5 deletions
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7
test/crypto_kem/functest.c
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@ -176,20 +176,17 @@ static int test_invalid_ciphertext(void) {
uint8_t pk[CRYPTO_PUBLICKEYBYTES]; uint8_t pk[CRYPTO_PUBLICKEYBYTES];
uint8_t sendb[CRYPTO_CIPHERTEXTBYTES]; uint8_t sendb[CRYPTO_CIPHERTEXTBYTES];
int i; int i;
size_t pos;
int returncode; int returncode;
for (i = 0; i < NTESTS; i++) { for (i = 0; i < NTESTS; i++) {
randombytes((uint8_t *)&pos, sizeof(size_t));
// Alice generates a public key // Alice generates a public key
RETURNS_ZERO(crypto_kem_keypair(pk, sk_a)); RETURNS_ZERO(crypto_kem_keypair(pk, sk_a));
// Bob derives a secret key and creates a response // Bob derives a secret key and creates a response
RETURNS_ZERO(crypto_kem_enc(sendb, key_b, pk)); RETURNS_ZERO(crypto_kem_enc(sendb, key_b, pk));
// Change some byte in the ciphertext (i.e., encapsulated key) // Change ciphertext to random value
sendb[pos % CRYPTO_CIPHERTEXTBYTES] ^= 23; randombytes(sendb, sizeof(sendb));
// Alice uses Bobs response to get her secret key // Alice uses Bobs response to get her secret key
if ((returncode = crypto_kem_dec(key_a, sendb, sk_a)) > 0) { if ((returncode = crypto_kem_dec(key_a, sendb, sk_a)) > 0) {