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#include "p11-tests-lib.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/dh.h>
static int
compare_secret_values (void *one, size_t n_one, void *two, size_t n_two)
{
if (n_one > n_two)
return memcmp (one + (n_one - n_two), two, n_two);
else
return memcmp (one, two + (n_two - n_one), n_one);
}
static DH*
generate_peer_dh (CK_SESSION_HANDLE session, CK_OBJECT_HANDLE key)
{
CK_ATTRIBUTE attrs[2];
CK_BYTE prime[16384];
CK_BYTE base[1024];
DH *dh;
attrs[0].type = CKA_PRIME;
attrs[0].ulValueLen = sizeof (prime);
attrs[0].pValue = prime;
attrs[1].type = CKA_BASE;
attrs[1].ulValueLen = sizeof (base);
attrs[1].pValue = base;
if (!p11t_object_get (session, key, attrs, 2))
return NULL;
if(attrs[0].ulValueLen == CK_INVALID ||
attrs[1].ulValueLen == CK_INVALID)
return NULL;
dh = DH_new ();
dh->p = BN_bin2bn (prime, attrs[0].ulValueLen, NULL);
dh->g = BN_bin2bn (base, attrs[1].ulValueLen, NULL);
assert(dh && dh->p && dh->g);
if (!DH_generate_key (dh)) {
DH_free (dh);
return NULL;
}
return dh;
}
int
test_dh_private_derive (CK_SESSION_HANDLE session, CK_OBJECT_HANDLE pub, CK_OBJECT_HANDLE prv)
{
CK_ATTRIBUTE attrs[3];
CK_KEY_TYPE key_type = CKK_AES;
CK_OBJECT_CLASS klass = CKO_SECRET_KEY;
CK_BYTE buffer[16384];
CK_BYTE value[16384];
CK_OBJECT_HANDLE derived;
CK_MECHANISM mech;
BIGNUM *our_pub;
CK_RV rv;
DH *dh;
P11T_SECTION("C_DeriveKey");
/* Setup peer's DH */
dh = generate_peer_dh (session, pub);
if (dh == NULL)
p11t_check_warn ("Couldn't retrieve DH parameters from DH pub key");
/* Dig out our public key */
attrs[0].type = CKA_VALUE;
attrs[0].pValue = value;
attrs[0].ulValueLen = sizeof (value);
if (p11t_object_get (session, pub, attrs, 1)) {
our_pub = BN_bin2bn (value, attrs[0].ulValueLen, NULL);
} else {
p11t_check_warn ("Couldn't retrieve DH public value from DH pub key");
our_pub = NULL;
}
mech.mechanism = CKM_DH_PKCS_DERIVE;
mech.pParameter = buffer;
mech.ulParameterLen = BN_num_bytes (dh->pub_key);
BN_bn2bin (dh->pub_key, buffer);
/* TODO: How can we know this key type is supported? */
attrs[0].type = CKA_KEY_TYPE;
attrs[0].pValue = &key_type;
attrs[0].ulValueLen = sizeof (key_type);
attrs[1].type = CKA_CLASS;
attrs[1].pValue = &klass;
attrs[1].ulValueLen = sizeof (klass);
rv = (p11t_module_funcs->C_DeriveKey) (session, &mech, prv, attrs, 2, &derived);
P11T_CHECK_RV ("CKM_DH_PKCS_DERIVE", rv, CKR_OK);
/* Compare to our generated key */
attrs[0].type = CKA_VALUE;
attrs[0].pValue = value;
attrs[0].ulValueLen = sizeof (value);
if (p11t_object_get (session, derived, attrs, 1) && attrs[0].ulValueLen != (CK_ULONG)-1 &&
dh != NULL && our_pub != NULL) {
if (!DH_compute_key (buffer, our_pub, dh))
assert (0);
if (compare_secret_values (value, attrs[0].ulValueLen, buffer, DH_size (dh)) != 0)
P11T_CHECK_FAIL_MSG ("CKM_DH_PKCS_DERIVE", "Derived key has wrong secret value");
}
BN_free (our_pub);
DH_free (dh);
return p11t_key_test (session, derived, CKO_SECRET_KEY);
}
int
p11t_dh_test_key_pair (CK_SESSION_HANDLE session, CK_OBJECT_HANDLE pub, CK_OBJECT_HANDLE prv)
{
CK_ULONG mechanisms[128];
CK_ATTRIBUTE attr = { CKA_ALLOWED_MECHANISMS, mechanisms, sizeof (mechanisms) };
CK_ULONG i;
/* Let's see if it support derivation */
if (!p11t_object_get (session, prv, &attr, 1))
return STOP;
for (i = 0; i < attr.ulValueLen / sizeof (CK_ULONG); ++i) {
if (mechanisms[i] == CKM_DH_PKCS_DERIVE)
test_dh_private_derive (session, pub, prv);
}
return CONTINUE;
}
static void
test_dh_key_pair_gen (CK_SLOT_ID slot, CK_MECHANISM_TYPE mech, CK_MECHANISM_INFO_PTR info)
{
CK_SESSION_HANDLE session;
session = p11t_session_open(slot, 0);
if(session == CK_INVALID || !p11t_session_login (session))
return;
p11t_dh_test_generate_pair (session);
}
void
p11t_dh_tests (void)
{
p11t_slot_for_each_mech (CKM_DH_PKCS_KEY_PAIR_GEN, test_dh_key_pair_gen);
}
int
p11t_dh_test_generate_pair (CK_SESSION_HANDLE session)
{
CK_ATTRIBUTE pub_attrs[3];
CK_ATTRIBUTE priv_attrs[3];
CK_MECHANISM mech;
CK_OBJECT_HANDLE pub_key;
CK_OBJECT_HANDLE priv_key;
CK_ULONG bits;
CK_RV rv;
DH *dh;
P11T_SECTION ("C_GenerateKeyPair");
dh = DH_generate_parameters (256, 2, NULL, NULL);
assert (dh);
pub_attrs[0].type = CKA_PRIME;
pub_attrs[0].ulValueLen = BN_num_bytes (dh->p);
pub_attrs[0].pValue = alloca (pub_attrs[0].ulValueLen);
BN_bn2bin (dh->p, (unsigned char*)pub_attrs[0].pValue);
pub_attrs[1].type = CKA_BASE;
pub_attrs[1].ulValueLen = BN_num_bytes (dh->g);
pub_attrs[1].pValue = alloca (pub_attrs[1].ulValueLen);
BN_bn2bin (dh->g, (unsigned char*)pub_attrs[1].pValue);
priv_attrs[0].type = CKA_PRIME;
priv_attrs[0].ulValueLen = BN_num_bytes (dh->p);
priv_attrs[0].pValue = alloca (priv_attrs[0].ulValueLen);
BN_bn2bin (dh->p, (unsigned char*)priv_attrs[0].pValue);
priv_attrs[1].type = CKA_BASE;
priv_attrs[1].ulValueLen = BN_num_bytes (dh->g);
priv_attrs[1].pValue = alloca (priv_attrs[1].ulValueLen);
BN_bn2bin (dh->g, (unsigned char*)priv_attrs[1].pValue);
priv_attrs[2].type = CKA_VALUE_BITS;
priv_attrs[2].ulValueLen = sizeof (bits);
priv_attrs[2].pValue = &bits;
mech.mechanism = CKM_DH_PKCS_KEY_PAIR_GEN;
mech.pParameter = NULL;
mech.ulParameterLen = 0;
if (p11t_test_unexpected) {
rv = (p11t_module_funcs->C_GenerateKeyPair) (session, &mech, pub_attrs, 0, priv_attrs, 0, &pub_key, &priv_key);
P11T_CHECK_RV ("DH Key Pair without CKA_PRIME", rv, CKR_TEMPLATE_INCOMPLETE);
bits = 1024;
rv = (p11t_module_funcs->C_GenerateKeyPair) (session, &mech, pub_attrs, 2, priv_attrs, 3, &pub_key, &priv_key);
P11T_CHECK_RV ("DH Key Pair with CKA_VALUE_BITS larger than CKA_PRIME", rv, CKR_TEMPLATE_INCONSISTENT);
}
bits = 256;
rv = (p11t_module_funcs->C_GenerateKeyPair) (session, &mech, pub_attrs, 2, priv_attrs, 3, &pub_key, &priv_key);
P11T_CHECK_RV ("DH Key Pair", rv, CKR_OK);
p11t_key_test (session, pub_key, CKO_PUBLIC_KEY);
p11t_key_test (session, priv_key, CKO_PRIVATE_KEY);
/* Test corner cases */
return p11t_object_generate_pair_bad (session, CKM_DH_PKCS_KEY_PAIR_GEN);
}
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