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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <algorithm>
#include <memory>
#include "nss.h"
#include "pk11pub.h"
#include "prerror.h"
#include "cpputil.h"
#include "nss_scoped_ptrs.h"
#include "json_reader.h"
#include "testvectors/curve25519-vectors.h"
#include "gtest/gtest.h"
namespace nss_test {
class Pkcs11Curve25519TestBase {
protected:
void Derive(const uint8_t* pkcs8, size_t pkcs8_len, const uint8_t* spki,
size_t spki_len, const uint8_t* secret, size_t secret_len,
bool expect_success) {
ScopedPK11SlotInfo slot(PK11_GetInternalKeySlot());
ASSERT_TRUE(slot);
SECItem pkcs8_item = {siBuffer, toUcharPtr(pkcs8),
static_cast<unsigned int>(pkcs8_len)};
SECKEYPrivateKey* key = nullptr;
SECStatus rv = PK11_ImportDERPrivateKeyInfoAndReturnKey(
slot.get(), &pkcs8_item, nullptr, nullptr, false, false, KU_ALL, &key,
nullptr);
EXPECT_EQ(SECSuccess, rv);
ScopedSECKEYPrivateKey priv_key_sess(key);
ASSERT_TRUE(priv_key_sess);
SECItem spki_item = {siBuffer, toUcharPtr(spki),
static_cast<unsigned int>(spki_len)};
ScopedCERTSubjectPublicKeyInfo cert_spki(
SECKEY_DecodeDERSubjectPublicKeyInfo(&spki_item));
if (!expect_success && !cert_spki) {
return;
}
ASSERT_TRUE(cert_spki);
ScopedSECKEYPublicKey pub_key_remote(
SECKEY_ExtractPublicKey(cert_spki.get()));
ASSERT_TRUE(pub_key_remote);
// sym_key_sess = ECDH(session_import(private_test), public_test)
ScopedPK11SymKey sym_key_sess(PK11_PubDeriveWithKDF(
priv_key_sess.get(), pub_key_remote.get(), false, nullptr, nullptr,
CKM_ECDH1_DERIVE, CKM_SHA512_HMAC, CKA_DERIVE, 0, CKD_NULL, nullptr,
nullptr));
ASSERT_EQ(expect_success, !!sym_key_sess);
if (expect_success) {
rv = PK11_ExtractKeyValue(sym_key_sess.get());
EXPECT_EQ(SECSuccess, rv);
SECItem* key_data = PK11_GetKeyData(sym_key_sess.get());
EXPECT_EQ(secret_len, key_data->len);
EXPECT_EQ(memcmp(key_data->data, secret, secret_len), 0);
// Perform wrapped export on the imported private, import it as
// permanent, and verify we derive the same shared secret
static const uint8_t pw[] = "pw";
SECItem pwItem = {siBuffer, toUcharPtr(pw), sizeof(pw)};
ScopedSECKEYEncryptedPrivateKeyInfo epki(PK11_ExportEncryptedPrivKeyInfo(
slot.get(), SEC_OID_AES_256_CBC, &pwItem, priv_key_sess.get(), 1,
nullptr));
ASSERT_NE(nullptr, epki) << "PK11_ExportEncryptedPrivKeyInfo failed: "
<< PORT_ErrorToName(PORT_GetError());
ScopedSECKEYPublicKey pub_key_local(
SECKEY_ConvertToPublicKey(priv_key_sess.get()));
SECKEYPrivateKey* priv_key_tok = nullptr;
rv = PK11_ImportEncryptedPrivateKeyInfoAndReturnKey(
slot.get(), epki.get(), &pwItem, nullptr,
&pub_key_local->u.ec.publicValue, PR_TRUE, PR_TRUE, ecKey, 0,
&priv_key_tok, nullptr);
ASSERT_EQ(SECSuccess, rv) << "PK11_ImportEncryptedPrivateKeyInfo failed "
<< PORT_ErrorToName(PORT_GetError());
ASSERT_TRUE(priv_key_tok);
// sym_key_tok = ECDH(token_import(export(private_test)),
// public_test)
ScopedPK11SymKey sym_key_tok(PK11_PubDeriveWithKDF(
priv_key_tok, pub_key_remote.get(), false, nullptr, nullptr,
CKM_ECDH1_DERIVE, CKM_SHA512_HMAC, CKA_DERIVE, 0, CKD_NULL, nullptr,
nullptr));
EXPECT_TRUE(sym_key_tok);
if (sym_key_tok) {
rv = PK11_ExtractKeyValue(sym_key_tok.get());
EXPECT_EQ(SECSuccess, rv);
key_data = PK11_GetKeyData(sym_key_tok.get());
EXPECT_EQ(secret_len, key_data->len);
EXPECT_EQ(memcmp(key_data->data, secret, secret_len), 0);
}
rv = PK11_DeleteTokenPrivateKey(priv_key_tok, true);
EXPECT_EQ(SECSuccess, rv);
}
}
void Derive(const EcdhTestVector& testvector) {
std::cout << "Running test: " << testvector.id << std::endl;
Derive(testvector.private_key.data(), testvector.private_key.size(),
testvector.public_key.data(), testvector.public_key.size(),
testvector.secret.data(), testvector.secret.size(),
testvector.valid);
}
};
class Pkcs11Curve25519Wycheproof : public Pkcs11Curve25519TestBase,
public ::testing::Test {
protected:
void RunGroup(JsonReader& r) {
std::vector<EcdhTestVector> tests;
while (r.NextItem()) {
std::string n = r.ReadLabel();
if (n == "") {
break;
}
if (n == "curve") {
ASSERT_EQ("curve25519", r.ReadString());
} else if (n == "type") {
ASSERT_EQ("XdhComp", r.ReadString());
} else if (n == "tests") {
WycheproofReadTests(r, &tests, ReadTestAttr, true,
Pkcs11Curve25519Wycheproof::FilterInvalid);
} else {
FAIL() << "unknown group label: " << n;
}
}
for (auto& t : tests) {
Derive(t);
}
}
private:
static void FilterInvalid(EcdhTestVector& t, const std::string& result,
const std::vector<std::string>& flags) {
static const std::vector<uint8_t> kNonCanonPublic1 = {
0x30, 0x39, 0x30, 0x14, 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02,
0x01, 0x06, 0x09, 0x2b, 0x06, 0x01, 0x04, 0x01, 0xda, 0x47, 0x0f, 0x01,
0x03, 0x21, 0x00, 0xda, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
static const std::vector<uint8_t> kNonCanonPublic2 = {
0x30, 0x39, 0x30, 0x14, 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02,
0x01, 0x06, 0x09, 0x2b, 0x06, 0x01, 0x04, 0x01, 0xda, 0x47, 0x0f, 0x01,
0x03, 0x21, 0x00, 0xdb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
if (result == "acceptable" &&
(std::find_if(flags.begin(), flags.end(),
[](const std::string& flag) {
return flag == "SmallPublicKey" ||
flag == "ZeroSharedSecret";
}) != flags.end() ||
t.public_key == kNonCanonPublic1 ||
t.public_key == kNonCanonPublic2)) {
t.valid = false;
}
}
static void ReadTestAttr(EcdhTestVector& t, const std::string& n,
JsonReader& r) {
// Static PKCS#8 and SPKI wrappers for the raw keys from Wycheproof.
static const std::vector<uint8_t> kPrivatePrefix = {
0x30, 0x67, 0x02, 0x01, 0x00, 0x30, 0x14, 0x06, 0x07, 0x2a, 0x86, 0x48,
0xce, 0x3d, 0x02, 0x01, 0x06, 0x09, 0x2b, 0x06, 0x01, 0x04, 0x01, 0xda,
0x47, 0x0f, 0x01, 0x04, 0x4c, 0x30, 0x4a, 0x02, 0x01, 0x01, 0x04, 0x20};
// The public key section of the PKCS#8 wrapper is filled up with 0's, which
// is not correct, but acceptable for the tests at this moment because
// validity of the public key is not checked.
// It's still necessary because of
// https://searchfox.org/nss/rev/7bc70a3317b800aac07bad83e74b6c79a9ec5bff/lib/pk11wrap/pk11pk12.c#171
static const std::vector<uint8_t> kPrivateSuffix = {
0xa1, 0x23, 0x03, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
static const std::vector<uint8_t> kPublicPrefix = {
0x30, 0x39, 0x30, 0x14, 0x06, 0x07, 0x2a, 0x86, 0x48,
0xce, 0x3d, 0x02, 0x01, 0x06, 0x09, 0x2b, 0x06, 0x01,
0x04, 0x01, 0xda, 0x47, 0x0f, 0x01, 0x03, 0x21, 0x00};
if (n == "public") {
t.public_key = kPublicPrefix;
std::vector<uint8_t> pub = r.ReadHex();
t.public_key.insert(t.public_key.end(), pub.begin(), pub.end());
} else if (n == "private") {
t.private_key = kPrivatePrefix;
std::vector<uint8_t> priv = r.ReadHex();
t.private_key.insert(t.private_key.end(), priv.begin(), priv.end());
t.private_key.insert(t.private_key.end(), kPrivateSuffix.begin(),
kPrivateSuffix.end());
} else if (n == "shared") {
t.secret = r.ReadHex();
} else {
FAIL() << "unsupported test case field: " << n;
}
}
};
TEST_F(Pkcs11Curve25519Wycheproof, Run) {
WycheproofHeader("x25519", "XDH", "xdh_comp_schema.json",
[this](JsonReader& r) { RunGroup(r); });
}
class Pkcs11Curve25519ParamTest
: public Pkcs11Curve25519TestBase,
public ::testing::TestWithParam<EcdhTestVector> {};
TEST_P(Pkcs11Curve25519ParamTest, TestVectors) { Derive(GetParam()); }
INSTANTIATE_TEST_SUITE_P(NSSTestVector, Pkcs11Curve25519ParamTest,
::testing::ValuesIn(kCurve25519Vectors));
} // namespace nss_test
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