Add test case for ecdh_calc_secret
Add a test case for doing an ECDH calculation by calling
mbedtls_ecdh_get_params on both keys, then mbedtls_ecdh_calc_secret.
diff --git a/tests/suites/test_suite_ecdh.data b/tests/suites/test_suite_ecdh.data
index fe24ed4..f90d88d 100644
--- a/tests/suites/test_suite_ecdh.data
+++ b/tests/suites/test_suite_ecdh.data
@@ -79,3 +79,11 @@
ECDH exchange legacy context
depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
ecdh_exchange_legacy:MBEDTLS_ECP_DP_SECP192R1
+
+ECDH calc_secret: ours first, SECP256R1 (RFC 5903)
+depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
+ecdh_exchange_calc_secret:MBEDTLS_ECP_DP_SECP256R1:"c6ef9c5d78ae012a011164acb397ce2088685d8f06bf9be0b283ab46476bee53":"04dad0b65394221cf9b051e1feca5787d098dfe637fc90b9ef945d0c37725811805271a0461cdb8252d61f1c456fa3e59ab1f45b33accf5f58389e0577b8990bb3":0:"d6840f6b42f6edafd13116e0e12565202fef8e9ece7dce03812464d04b9442de"
+
+ECDH calc_secret: theirs first, SECP256R1 (RFC 5903)
+depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
+ecdh_exchange_calc_secret:MBEDTLS_ECP_DP_SECP256R1:"c6ef9c5d78ae012a011164acb397ce2088685d8f06bf9be0b283ab46476bee53":"04dad0b65394221cf9b051e1feca5787d098dfe637fc90b9ef945d0c37725811805271a0461cdb8252d61f1c456fa3e59ab1f45b33accf5f58389e0577b8990bb3":1:"d6840f6b42f6edafd13116e0e12565202fef8e9ece7dce03812464d04b9442de"
diff --git a/tests/suites/test_suite_ecdh.function b/tests/suites/test_suite_ecdh.function
index 7db0ed1..1a7372e 100644
--- a/tests/suites/test_suite_ecdh.function
+++ b/tests/suites/test_suite_ecdh.function
@@ -1,5 +1,41 @@
/* BEGIN_HEADER */
#include "mbedtls/ecdh.h"
+
+static int load_public_key( int grp_id, data_t *point,
+ mbedtls_ecp_keypair *ecp )
+{
+ int ok = 0;
+ TEST_ASSERT( mbedtls_ecp_group_load( &ecp->grp, grp_id ) == 0 );
+ TEST_ASSERT( mbedtls_ecp_point_read_binary( &ecp->grp,
+ &ecp->Q,
+ point->x,
+ point->len ) == 0 );
+ TEST_ASSERT( mbedtls_ecp_check_pubkey( &ecp->grp,
+ &ecp->Q ) == 0 );
+ ok = 1;
+exit:
+ return( ok );
+}
+
+static int load_private_key( int grp_id, data_t *private_key,
+ mbedtls_ecp_keypair *ecp,
+ rnd_pseudo_info *rnd_info )
+{
+ int ok = 0;
+ TEST_ASSERT( mbedtls_ecp_group_load( &ecp->grp, grp_id ) == 0 );
+ TEST_ASSERT( mbedtls_mpi_read_binary( &ecp->d,
+ private_key->x,
+ private_key->len ) == 0 );
+ TEST_ASSERT( mbedtls_ecp_check_privkey( &ecp->grp, &ecp->d ) == 0 );
+ /* Calculate the public key from the private key. */
+ TEST_ASSERT( mbedtls_ecp_mul( &ecp->grp, &ecp->Q, &ecp->d,
+ &ecp->grp.G,
+ &rnd_pseudo_rand, rnd_info ) == 0 );
+ ok = 1;
+exit:
+ return( ok );
+}
+
/* END_HEADER */
/* BEGIN_DEPENDENCIES
@@ -464,3 +500,60 @@
mbedtls_ecdh_free( &cli );
}
/* END_CASE */
+
+/* BEGIN_CASE */
+void ecdh_exchange_calc_secret( int grp_id,
+ data_t *our_private_key,
+ data_t *their_point,
+ int ours_first,
+ data_t *expected )
+{
+ rnd_pseudo_info rnd_info;
+ mbedtls_ecp_keypair our_key;
+ mbedtls_ecp_keypair their_key;
+ mbedtls_ecdh_context ecdh;
+ unsigned char shared_secret[MBEDTLS_ECP_MAX_BYTES];
+ size_t shared_secret_length = 0;
+
+ memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) );
+ mbedtls_ecdh_init( &ecdh );
+ mbedtls_ecp_keypair_init( &our_key );
+ mbedtls_ecp_keypair_init( &their_key );
+
+ if( ! load_private_key( grp_id, our_private_key, &our_key, &rnd_info ) )
+ goto exit;
+ if( ! load_public_key( grp_id, their_point, &their_key ) )
+ goto exit;
+
+ /* Import the keys to the ECDH calculation. */
+ if( ours_first )
+ {
+ TEST_ASSERT( mbedtls_ecdh_get_params(
+ &ecdh, &our_key, MBEDTLS_ECDH_OURS ) == 0 );
+ TEST_ASSERT( mbedtls_ecdh_get_params(
+ &ecdh, &their_key, MBEDTLS_ECDH_THEIRS ) == 0 );
+ }
+ else
+ {
+ TEST_ASSERT( mbedtls_ecdh_get_params(
+ &ecdh, &their_key, MBEDTLS_ECDH_THEIRS ) == 0 );
+ TEST_ASSERT( mbedtls_ecdh_get_params(
+ &ecdh, &our_key, MBEDTLS_ECDH_OURS ) == 0 );
+ }
+
+ /* Perform the ECDH calculation. */
+ TEST_ASSERT( mbedtls_ecdh_calc_secret(
+ &ecdh,
+ &shared_secret_length,
+ shared_secret, sizeof( shared_secret ),
+ &rnd_pseudo_rand, &rnd_info ) == 0 );
+ TEST_ASSERT( shared_secret_length == expected->len );
+ TEST_ASSERT( memcmp( expected->x, shared_secret,
+ shared_secret_length ) == 0 );
+
+exit:
+ mbedtls_ecdh_free( &ecdh );
+ mbedtls_ecp_keypair_free( &our_key );
+ mbedtls_ecp_keypair_free( &their_key );
+}
+/* END_CASE */