NTRU_IoT/legacy-code/test/check_public.c

716 lines
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C
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2022-02-01 11:45:47 -05:00
#include <stdio.h>
#include <stdlib.h>
#include <check.h>
#include "ntru_crypto.h"
#include "ntru_crypto_drbg.h"
#include "test_common.h"
#include "check_common.h"
START_TEST(test_api_crypto)
{
uint32_t rc;
NTRU_CK_MEM public_key_mem;
NTRU_CK_MEM public_key2_mem;
NTRU_CK_MEM private_key_mem;
NTRU_CK_MEM message_mem;
NTRU_CK_MEM ciphertext_mem;
NTRU_CK_MEM plaintext_mem;
NTRU_CK_MEM encoded_public_key_mem;
uint8_t *public_key = NULL;
uint8_t *public_key2 = NULL;
uint8_t *private_key = NULL;
uint8_t *message = NULL;
uint8_t *ciphertext = NULL;
uint8_t *plaintext = NULL;
uint8_t *encoded_public_key = NULL;
uint8_t *next = NULL;
uint8_t tag = 0;
uint16_t max_msg_len = 0;
uint16_t mlen = 0;
uint16_t public_key_len = 0;
uint16_t public_key2_len = 0;
uint16_t private_key_len = 0;
uint16_t ciphertext_len = 0;
uint16_t plaintext_len = 0;
uint16_t encoded_public_key_len = 0;
uint32_t next_len;
NTRU_ENCRYPT_PARAM_SET_ID param_set_id;
param_set_id = PARAM_SET_IDS[_i];
/* Get public/private key lengths */
rc = ntru_crypto_ntru_encrypt_keygen(drbg, param_set_id, &public_key_len,
NULL, &private_key_len, NULL);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
ck_assert_uint_gt(public_key_len, 0);
ck_assert_uint_gt(private_key_len, 0);
/* Allocate storage for keys */
public_key = ntru_ck_malloc(&public_key_mem, public_key_len);
private_key = ntru_ck_malloc(&private_key_mem, private_key_len);
/* Generate key */
rc = ntru_crypto_ntru_encrypt_keygen(drbg, param_set_id,
&public_key_len, public_key,
&private_key_len, private_key);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
/* Check public key validity and get maximum ciphertext length */
rc = ntru_crypto_ntru_encrypt(drbg, public_key_len, public_key, 0, NULL,
&ciphertext_len, NULL);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
/* Check private key validity and get maximum plaintext length */
rc = ntru_crypto_ntru_decrypt(private_key_len, private_key, 0, NULL,
&max_msg_len, NULL);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
/* Allocate memory for plaintexts/ciphertexts */
message = ntru_ck_malloc(&message_mem, (1 + max_msg_len));
ciphertext = ntru_ck_malloc(&ciphertext_mem, ciphertext_len);
plaintext = ntru_ck_malloc(&plaintext_mem, max_msg_len);
/* Encrypt/decrypt at every valid message length */
for(mlen=0; mlen<=max_msg_len; mlen++)
{
plaintext_len = max_msg_len;
randombytes(message, mlen);
randombytes(ciphertext, ciphertext_len);
randombytes(plaintext, plaintext_len);
rc = ntru_crypto_ntru_encrypt(drbg, public_key_len, public_key,
mlen, message, &ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
rc = ntru_crypto_ntru_decrypt(private_key_len, private_key,
ciphertext_len, ciphertext,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
ck_assert_uint_eq(plaintext_len, mlen);
ck_assert_int_eq(memcmp(plaintext,message,mlen), 0);
}
randombytes(message, 1+max_msg_len);
memset(ciphertext, 0, ciphertext_len);
memset(plaintext, 0, plaintext_len);
/* Begin checking error cases */
/*
* KeyGen Error Cases
*/
/* Generate a key with unknown parameter set */
rc = ntru_crypto_ntru_encrypt_keygen(drbg, -1,
&public_key_len, public_key,
&private_key_len, private_key);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_INVALID_PARAMETER_SET));
/* Public key buffer length not provided */
rc = ntru_crypto_ntru_encrypt_keygen(drbg, param_set_id,
NULL, public_key,
NULL, private_key);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PARAMETER));
/* Public key buffer is too short */
public_key_len -= 1;
rc = ntru_crypto_ntru_encrypt_keygen(drbg, param_set_id,
&public_key_len, public_key,
&private_key_len, private_key);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BUFFER_TOO_SMALL));
public_key_len += 1;
/* Private key buffer is too short */
private_key_len -= 1;
rc = ntru_crypto_ntru_encrypt_keygen(drbg, param_set_id,
&public_key_len, public_key,
&private_key_len, private_key);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BUFFER_TOO_SMALL));
private_key_len += 1;
/*
* Encrypt Error Cases
*/
/* Public key not provided */
rc = ntru_crypto_ntru_encrypt(drbg, public_key_len, NULL,
max_msg_len, message,
&ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PARAMETER));
/* Public key length zero */
rc = ntru_crypto_ntru_encrypt(drbg, 0, public_key,
max_msg_len, message,
&ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_LENGTH));
/* Public key truncated */
rc = ntru_crypto_ntru_encrypt(drbg, public_key_len-1, public_key,
max_msg_len, message,
&ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PUBLIC_KEY));
/* Public key severely truncated */
rc = ntru_crypto_ntru_encrypt(drbg, 4, public_key,
max_msg_len, message,
&ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PUBLIC_KEY));
/* Public key has OID field of length != 3 */
public_key[1] = 255;
rc = ntru_crypto_ntru_encrypt(drbg, public_key_len, public_key,
max_msg_len, message,
&ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PUBLIC_KEY));
public_key[1] = 3;
/* Public key has private key tag */
tag = public_key[0];
public_key[0] = 0x02;
rc = ntru_crypto_ntru_encrypt(drbg, public_key_len, public_key,
max_msg_len, message,
&ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PUBLIC_KEY));
/* Public key has unrecognized tag */
public_key[0] = 0xaa;
rc = ntru_crypto_ntru_encrypt(drbg, public_key_len, public_key,
max_msg_len, message,
&ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PUBLIC_KEY));
public_key[0] = tag;
/* Plaintext not provided */
rc = ntru_crypto_ntru_encrypt(drbg, public_key_len, public_key,
max_msg_len, NULL,
&ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PARAMETER));
/* Plaintext that is too long */
rc = ntru_crypto_ntru_encrypt(drbg, public_key_len, public_key,
1+max_msg_len, message,
&ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_LENGTH));
/* Ciphertext buffer that is too short */
ciphertext_len -= 1;
rc = ntru_crypto_ntru_encrypt(drbg, public_key_len, public_key,
max_msg_len, message,
&ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BUFFER_TOO_SMALL));
ciphertext_len += 1;
/* Perform a good encryption before testing decryption */
randombytes(message, max_msg_len);
rc = ntru_crypto_ntru_encrypt(drbg, public_key_len, public_key,
max_msg_len, message, &ciphertext_len, ciphertext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
/*
* Decrypt Error Cases
*/
/* Private key not provided */
rc = ntru_crypto_ntru_decrypt(private_key_len, NULL,
ciphertext_len, ciphertext,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PARAMETER));
/* Private key length zero */
rc = ntru_crypto_ntru_decrypt(0, private_key,
ciphertext_len, ciphertext,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_LENGTH));
/* Private key truncated */
rc = ntru_crypto_ntru_decrypt(private_key_len-10, private_key,
ciphertext_len, ciphertext,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PRIVATE_KEY));
/* Private key has public key tag */
tag = private_key[0];
private_key[0] = 0x01;
rc = ntru_crypto_ntru_decrypt(private_key_len, private_key,
ciphertext_len, ciphertext,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PRIVATE_KEY));
private_key[0] = tag;
/* Private key has bad OID */
private_key[3] ^= 0xff;
rc = ntru_crypto_ntru_decrypt(private_key_len, private_key,
ciphertext_len, ciphertext,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PRIVATE_KEY));
private_key[3] ^= 0xff;
/* Ciphertext not provided */
rc = ntru_crypto_ntru_decrypt(private_key_len, private_key,
ciphertext_len, NULL,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PARAMETER));
/* Ciphertext truncated */
rc = ntru_crypto_ntru_decrypt(private_key_len, private_key,
ciphertext_len-10, ciphertext,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_LENGTH));
/* Ciphertext manipulated */
ciphertext[ciphertext_len>>1] ^= 0xff;
rc = ntru_crypto_ntru_decrypt(private_key_len, private_key,
ciphertext_len, ciphertext,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_FAIL));
ciphertext[ciphertext_len>>1] ^= 0xff;
/* Plaintext buffer too short */
plaintext_len -= 1;
rc = ntru_crypto_ntru_decrypt(private_key_len, private_key,
ciphertext_len, ciphertext,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BUFFER_TOO_SMALL));
plaintext_len += 1;
/* Overwrite key pair and try decrypt with wrong key */
rc = ntru_crypto_ntru_encrypt_keygen(drbg, param_set_id,
&public_key_len, public_key,
&private_key_len, private_key);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
rc = ntru_crypto_ntru_decrypt(private_key_len, private_key,
ciphertext_len, ciphertext,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_FAIL));
/* Try decrypting junk */
randombytes(ciphertext, ciphertext_len);
rc = ntru_crypto_ntru_decrypt(private_key_len, private_key,
ciphertext_len, ciphertext,
&plaintext_len, plaintext);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_FAIL));
/* Check x509 encoding/decoding */
/* Get encoded public key size */
rc = ntru_crypto_ntru_encrypt_publicKey2SubjectPublicKeyInfo(
public_key_len, public_key, &encoded_public_key_len, NULL);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
/* Perform the encoding */
encoded_public_key = ntru_ck_malloc(&encoded_public_key_mem,
encoded_public_key_len);
rc = ntru_crypto_ntru_encrypt_publicKey2SubjectPublicKeyInfo(
public_key_len, public_key, &encoded_public_key_len,
encoded_public_key);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
/* Get the decoded public key size */
next = encoded_public_key;
next_len = encoded_public_key_len;
rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(next,
&public_key2_len, NULL, &next, &next_len);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
ck_assert_uint_eq(public_key_len, public_key2_len);
ck_assert_uint_eq(next_len, encoded_public_key_len);
ck_assert_ptr_eq(next, encoded_public_key);
/* Perform the decoding */
public_key2 = ntru_ck_malloc(&public_key2_mem, public_key2_len);
rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(next,
&public_key2_len, public_key2, &next, &next_len);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OK));
ck_assert_uint_eq(next_len, 0);
ck_assert_ptr_eq(next, NULL);
/* Check decoded key matches original */
ck_assert_uint_eq(public_key_len, public_key2_len);
ck_assert_int_eq(memcmp(public_key,public_key2,public_key_len), 0);
/* Test error cases */
next = encoded_public_key;
next_len = encoded_public_key_len;
/* Public key to be encoded is not provided */
rc = ntru_crypto_ntru_encrypt_publicKey2SubjectPublicKeyInfo(
public_key_len, NULL, &encoded_public_key_len, next);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PARAMETER));
/* Public key to be encoded is length zero */
rc = ntru_crypto_ntru_encrypt_publicKey2SubjectPublicKeyInfo(
0, public_key, &encoded_public_key_len, next);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_LENGTH));
/* Public key is corrupted */
public_key[0] ^= 0xff;
rc = ntru_crypto_ntru_encrypt_publicKey2SubjectPublicKeyInfo(
public_key_len, public_key, &encoded_public_key_len, next);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PUBLIC_KEY));
public_key[0] ^= 0xff;
/* Encoded public key buffer too short */
encoded_public_key_len -= 1;
rc = ntru_crypto_ntru_encrypt_publicKey2SubjectPublicKeyInfo(
public_key_len, public_key, &encoded_public_key_len,
encoded_public_key);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BUFFER_TOO_SMALL));
encoded_public_key_len += 1;
/* Encoded data not provided */
rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(NULL,
&public_key2_len, public_key2, &next, &next_len);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_PARAMETER));
/* Encoded data truncated */
next_len = encoded_public_key_len-1;
rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(next,
&public_key2_len, public_key2, &next, &next_len);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_LENGTH));
next_len = encoded_public_key_len;
/* Encoded data of length less than prefix */
next_len = 17;
rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(next,
&public_key2_len, public_key2, &next, &next_len);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_LENGTH));
next_len = encoded_public_key_len;
/* Buffer for decoded key too short */
public_key2_len -= 1;
rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(next,
&public_key2_len, public_key2, &next, &next_len);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BUFFER_TOO_SMALL));
public_key2_len += 1;
/* Manipulate the DER id, should fail with OID_NOT_RECOGNIZED */
tag = encoded_public_key[31];
encoded_public_key[31] = 0xff;
next = encoded_public_key;
next_len = encoded_public_key_len;
rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(next,
&public_key2_len, public_key2, &next, &next_len);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_OID_NOT_RECOGNIZED));
encoded_public_key[31] = tag;
/* Manipulate the template, should fail with BAD_ENCODING */
memset(encoded_public_key, 18, 0xff);
next = encoded_public_key;
next_len = encoded_public_key_len;
rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(next,
&public_key2_len, public_key2, &next, &next_len);
ck_assert_uint_eq(rc, NTRU_RESULT(NTRU_BAD_ENCODING));
ntru_ck_mem_ok(&public_key2_mem);
ntru_ck_mem_ok(&encoded_public_key_mem);
ntru_ck_mem_ok(&message_mem);
ntru_ck_mem_ok(&public_key_mem);
ntru_ck_mem_ok(&private_key_mem);
ntru_ck_mem_ok(&plaintext_mem);
ntru_ck_mem_ok(&ciphertext_mem);
ntru_ck_mem_free(&public_key2_mem);
ntru_ck_mem_free(&encoded_public_key_mem);
ntru_ck_mem_free(&message_mem);
ntru_ck_mem_free(&public_key_mem);
ntru_ck_mem_free(&private_key_mem);
ntru_ck_mem_free(&plaintext_mem);
ntru_ck_mem_free(&ciphertext_mem);
}
END_TEST
START_TEST(test_api_drbg_sha256_hmac)
{
/* We run this as a loop test _i indexes the size */
uint32_t sizes[] = {112, 128, 192, 256};
uint32_t s_bits = sizes[_i];
uint32_t i;
uint32_t j;
uint32_t rc;
DRBG_HANDLE handles[DRBG_MAX_INSTANTIATIONS];
DRBG_HANDLE extra;
const uint8_t pers_str[] = "test_api_drbg";
uint32_t pers_str_bytes = sizeof(pers_str);
uint8_t pool[10];
uint8_t pool2[sizeof(pool)];
/* Internal SHA256 DRBG type */
/* Bad parameters */
rc = ntru_crypto_drbg_instantiate(-1, pers_str, pers_str_bytes,
(ENTROPY_FN) drbg_sha256_hmac_get_entropy, handles+0);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_LENGTH));
rc = ntru_crypto_drbg_instantiate(s_bits, NULL, pers_str_bytes,
(ENTROPY_FN) drbg_sha256_hmac_get_entropy, handles+0);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
rc = ntru_crypto_drbg_instantiate(s_bits, pers_str,
HMAC_DRBG_MAX_PERS_STR_BYTES+1,
(ENTROPY_FN) drbg_sha256_hmac_get_entropy, handles+0);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_LENGTH));
rc = ntru_crypto_drbg_instantiate(s_bits, pers_str, pers_str_bytes,
NULL, handles+0);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
rc = ntru_crypto_drbg_instantiate(s_bits, pers_str, pers_str_bytes,
(ENTROPY_FN) drbg_sha256_hmac_get_entropy, NULL);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
/* Bad entropy functions */
/* Error in init */
rc = ntru_crypto_drbg_instantiate(s_bits, pers_str, pers_str_bytes,
(ENTROPY_FN) drbg_sha256_hmac_get_entropy_err_init, handles+0);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_ENTROPY_FAIL));
/* Error in get_num */
rc = ntru_crypto_drbg_instantiate(s_bits, pers_str, pers_str_bytes,
(ENTROPY_FN) drbg_sha256_hmac_get_entropy_err_get_num, handles+0);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_ENTROPY_FAIL));
/* get_num reports that source is perfectly predictable */
rc = ntru_crypto_drbg_instantiate(s_bits, pers_str, pers_str_bytes,
(ENTROPY_FN) drbg_sha256_hmac_get_entropy_err_num_eq_zero,
handles+0);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_ENTROPY_FAIL));
/* Error in get_byte */
rc = ntru_crypto_drbg_instantiate(s_bits, pers_str, pers_str_bytes,
(ENTROPY_FN) drbg_sha256_hmac_get_entropy_err_get_byte, handles+0);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_ENTROPY_FAIL));
/* Instantiate as many HMAC DRBGs as we are allowed */
for(i=0; i<DRBG_MAX_INSTANTIATIONS; i++)
{
rc = ntru_crypto_drbg_instantiate(s_bits, pers_str, pers_str_bytes,
(ENTROPY_FN) drbg_sha256_hmac_get_entropy, handles+i);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_OK));
}
/* Check pairwise distinctness of handles */
for(i=0; i<DRBG_MAX_INSTANTIATIONS-1; i++)
{
for(j=i+1; j<DRBG_MAX_INSTANTIATIONS; j++)
{
ck_assert_uint_ne(handles[i], handles[j]);
}
}
/* Instantiate too many DRBGs */
rc = ntru_crypto_drbg_instantiate(s_bits, pers_str, pers_str_bytes,
(ENTROPY_FN) drbg_sha256_hmac_get_entropy, &extra);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_NOT_AVAILABLE));
/* drbg_generate input checks */
rc = ntru_crypto_drbg_generate(handles[0], s_bits, sizeof(pool), NULL);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
rc = ntru_crypto_drbg_generate(handles[0], s_bits, 0, pool);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_LENGTH));
/* Use a DRBG */
rc = ntru_crypto_drbg_generate(handles[0], s_bits, sizeof(pool), pool);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_OK));
/* Use a second DRBG */
rc = ntru_crypto_drbg_generate(handles[1], s_bits, sizeof(pool2), pool2);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_OK));
/* Hopefully those outputs are different (w/ prob 2^-80) */
ck_assert_int_ne(memcmp(pool, pool2, sizeof(pool)), 0);
/* Reseed an HMAC DRBG (should not fail) */
rc = ntru_crypto_drbg_reseed(handles[0]);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_OK));
/* Try to get zero bytes */
rc = ntru_crypto_drbg_generate(handles[0], s_bits, 0, pool);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_LENGTH));
/* Request too high of a security level */
rc = ntru_crypto_drbg_generate(handles[0], 2*DRBG_MAX_SEC_STRENGTH_BITS,
sizeof(pool), pool);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_LENGTH));
/* Request too many bytes */
rc = ntru_crypto_drbg_generate(handles[0], s_bits,
1+HMAC_DRBG_MAX_BYTES_PER_REQUEST, pool);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_LENGTH));
/* Uninstantiate DRBGs */
for(i=0; i<DRBG_MAX_INSTANTIATIONS; i++)
{
rc = ntru_crypto_drbg_uninstantiate(handles[i]);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_OK));
}
/* Reseed a uninstantiated DRBG */
rc = ntru_crypto_drbg_reseed(handles[0]);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
/* Double uninstantiate */
rc = ntru_crypto_drbg_uninstantiate(handles[0]);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
/* Use an uninstantiated DRBG */
rc = ntru_crypto_drbg_generate(handles[0], 0, 10, pool);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
/* Use a DRBG that never existed */
handles[0] = 0xaabbccdd;
rc = ntru_crypto_drbg_generate(handles[0], 0, 10, pool);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
}
END_TEST
START_TEST(test_api_drbg_external)
{
uint32_t i;
uint32_t j;
uint32_t rc;
DRBG_HANDLE handles[DRBG_MAX_INSTANTIATIONS];
DRBG_HANDLE extra;
uint8_t pool[10];
uint8_t pool2[sizeof(pool)];
/* External DRBG type */
/* Bad parameters */
rc = ntru_crypto_drbg_external_instantiate(
(RANDOM_BYTES_FN) &randombytes, NULL);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
rc = ntru_crypto_drbg_external_instantiate(NULL, handles);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
/* Instantiate as many external DRBGs as we are allowed */
for(i=0; i<DRBG_MAX_INSTANTIATIONS; i++)
{
rc = ntru_crypto_drbg_external_instantiate(
(RANDOM_BYTES_FN) &randombytes, handles+i);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_OK));
}
/* Check pairwise distinctness of handles */
for(i=0; i<DRBG_MAX_INSTANTIATIONS-1; i++)
{
for(j=i+1; j<DRBG_MAX_INSTANTIATIONS; j++)
{
ck_assert_uint_ne(handles[i], handles[j]);
}
}
/* Instantiate too many DRBGs */
rc = ntru_crypto_drbg_external_instantiate(
(RANDOM_BYTES_FN) &randombytes, &extra);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_NOT_AVAILABLE));
/* Use a DRBG */
rc = ntru_crypto_drbg_generate(handles[0], 0, sizeof(pool), pool);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_OK));
/* Use a second DRBG */
rc = ntru_crypto_drbg_generate(handles[1], 0, sizeof(pool2), pool2);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_OK));
/* Hopefully those outputs are different (w/ prob 2^-80) */
ck_assert_int_ne(memcmp(pool, pool2, sizeof(pool)), 0);
/* Reseed an external DRBG (not implemented, should fail) */
rc = ntru_crypto_drbg_reseed(handles[0]);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
/* Try to get zero bytes */
rc = ntru_crypto_drbg_generate(handles[0], 0, 0, pool);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_LENGTH));
/* Instantiate too many DRBGs */
rc = ntru_crypto_drbg_external_instantiate(
(RANDOM_BYTES_FN) &randombytes, &extra);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_NOT_AVAILABLE));
/* Uninstantiate DRBGs */
for(i=0; i<DRBG_MAX_INSTANTIATIONS; i++)
{
rc = ntru_crypto_drbg_uninstantiate(handles[i]);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_OK));
}
/* Use an uninstantiated DRBG */
rc = ntru_crypto_drbg_generate(handles[0], 0, 10, pool);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
/* Use a DRBG that never existed */
handles[0] = 0xaabbccdd;
rc = ntru_crypto_drbg_generate(handles[0], 0, 10, pool);
ck_assert_uint_eq(rc, DRBG_RESULT(DRBG_BAD_PARAMETER));
}
END_TEST
START_TEST(test_get_param_set_name)
{
const char *name;
name = ntru_encrypt_get_param_set_name(NTRU_EES401EP2);
ck_assert_str_eq(name, "ees401ep2");
name = ntru_encrypt_get_param_set_name(-1);
ck_assert_ptr_eq((void *)name, NULL);
}
END_TEST
Suite *
ntruencrypt_public_test_suite(void)
{
Suite *s;
TCase *tc_api_crypto;
TCase *tc_api_drbg;
TCase *tc_api_misc;
s = suite_create("NTRUEncrypt.Public");
/* Test publicly accessible DRBG routines */
tc_api_drbg = tcase_create("drbg");
tcase_add_test(tc_api_drbg, test_api_drbg_external);
tcase_add_loop_test(tc_api_drbg, test_api_drbg_sha256_hmac, 0, 4);
/* Test publicly accessible crypto routines for each parameter set */
tc_api_crypto = tcase_create("crypto");
tcase_add_unchecked_fixture(tc_api_crypto, test_drbg_setup, test_drbg_teardown);
tcase_add_loop_test(tc_api_crypto, test_api_crypto, 0, NUM_PARAM_SETS);
tc_api_misc = tcase_create("misc");
tcase_add_test(tc_api_misc, test_get_param_set_name);
suite_add_tcase(s, tc_api_misc);
suite_add_tcase(s, tc_api_drbg);
suite_add_tcase(s, tc_api_crypto);
return s;
}
int
main(void)
{
int number_failed;
Suite *s;
SRunner *sr;
s = ntruencrypt_public_test_suite();
sr = srunner_create(s);
srunner_run_all(sr, CK_NORMAL);
number_failed = srunner_ntests_failed(sr);
srunner_free(sr);
return (number_failed == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}