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hkdf: Add tests for extract and expand

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Add tests for mbedtls_hkdf_extract() and mbedtls_hkdf_expand() from the
test vectors in Appendix A of RFC 5869.
This commit is contained in:
Jaeden Amero 2018-05-23 18:55:47 +01:00
parent 798363e4dc
commit 3618962cab
2 changed files with 127 additions and 0 deletions
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71
tests/suites/test_suite_hkdf.function
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@ -37,3 +37,74 @@ void test_hkdf( int md_alg, char *hex_ikm_string, char *hex_salt_string,
TEST_ASSERT( !strcmp( (char *)okm_string, hex_okm_string ) );
}
/* END_CASE */
/* BEGIN_CASE */
void test_hkdf_extract( int md_alg, char *hex_ikm_string,
char *hex_salt_string, char *hex_prk_string )
{
int ret;
unsigned char *ikm = NULL;
unsigned char *salt = NULL;
unsigned char *prk = NULL;
unsigned char *output_prk = NULL;
size_t ikm_len, salt_len, prk_len, output_prk_len;
const mbedtls_md_info_t *md = mbedtls_md_info_from_type( md_alg );
TEST_ASSERT( md != NULL );
output_prk_len = mbedtls_md_get_size( md );
output_prk = mbedtls_calloc( 1, output_prk_len );
ikm = unhexify_alloc( hex_ikm_string, &ikm_len );
salt = unhexify_alloc( hex_salt_string, &salt_len );
prk = unhexify_alloc( hex_prk_string, &prk_len );
TEST_ASSERT( prk_len == output_prk_len );
ret = mbedtls_hkdf_extract( md, salt, salt_len, ikm, ikm_len, output_prk );
TEST_ASSERT( ret == 0 );
TEST_ASSERT( !memcmp( output_prk, prk, prk_len ) );
exit:
mbedtls_free(ikm);
mbedtls_free(salt);
mbedtls_free(prk);
mbedtls_free(output_prk);
}
/* END_CASE */
/* BEGIN_CASE */
void test_hkdf_expand( int md_alg, char *hex_info_string,
char *hex_prk_string, char *hex_okm_string )
{
enum { OKM_LEN = 1024 };
int ret;
unsigned char *info = NULL;
unsigned char *prk = NULL;
unsigned char *okm = NULL;
unsigned char *output_okm = NULL;
size_t info_len, prk_len, okm_len;
const mbedtls_md_info_t *md = mbedtls_md_info_from_type( md_alg );
TEST_ASSERT( md != NULL );
output_okm = mbedtls_calloc( OKM_LEN, 1 );
prk = unhexify_alloc( hex_prk_string, &prk_len );
info = unhexify_alloc( hex_info_string, &info_len );
okm = unhexify_alloc( hex_okm_string, &okm_len );
TEST_ASSERT( prk_len == mbedtls_md_get_size( md ) );
TEST_ASSERT( okm_len < OKM_LEN );
ret = mbedtls_hkdf_expand( md, prk, prk_len, info, info_len,
output_okm, OKM_LEN );
TEST_ASSERT( ret == 0 );
TEST_ASSERT( !memcmp( output_okm, okm, okm_len ) );
exit:
mbedtls_free(info);
mbedtls_free(prk);
mbedtls_free(okm);
mbedtls_free(output_okm);
}
/* END_CASE */