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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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 <cstdint>
#include "cpputil.h"
#include "cryptohi.h"
#include "json_reader.h"
#include "gtest/gtest.h"
#include "limits.h"
#include "nss.h"
#include "nss_scoped_ptrs.h"
#include "pk11pub.h"
#include "databuffer.h"
#include "testvectors/rsa_signature-vectors.h"
#include "testvectors/rsaencrypt_bb2048-vectors.h"
#include "testvectors/rsaencrypt_bb3072-vectors.h"
namespace nss_test {
class RsaDecryptWycheproofTest : public ::testing::Test {
protected:
void Run(const std::string& name) {
WycheproofHeader(name, "RSAES-PKCS1-v1_5",
"rsaes_pkcs1_decrypt_schema.json",
[this](JsonReader& r) { RunGroup(r); });
}
void TestDecrypt(const RsaDecryptTestVector& vec) {
SECItem pkcs8_item = {siBuffer, toUcharPtr(vec.priv_key.data()),
static_cast<unsigned int>(vec.priv_key.size())};
ScopedPK11SlotInfo slot(PK11_GetInternalKeySlot());
EXPECT_NE(nullptr, slot);
SECKEYPrivateKey* key = nullptr;
SECStatus rv = PK11_ImportDERPrivateKeyInfoAndReturnKey(
slot.get(), &pkcs8_item, nullptr, nullptr, false, false, KU_ALL, &key,
nullptr);
ASSERT_EQ(SECSuccess, rv);
ASSERT_NE(nullptr, key);
ScopedSECKEYPrivateKey priv_key(key);
// Decrypt
std::vector<uint8_t> decrypted(PR_MAX(1, vec.ct.size()));
unsigned int decrypted_len = 0;
rv = PK11_PrivDecryptPKCS1(priv_key.get(), decrypted.data(), &decrypted_len,
decrypted.size(), vec.ct.data(), vec.ct.size());
decrypted.resize(decrypted_len);
if (vec.valid) {
ASSERT_EQ(SECSuccess, rv);
EXPECT_EQ(vec.msg, decrypted);
} else if (vec.invalid_padding) {
// If the padding is bad, decryption should succeed and produce
// (pseudo)random output.
ASSERT_EQ(SECSuccess, rv);
ASSERT_NE(vec.msg, decrypted);
} else {
ASSERT_EQ(SECFailure, rv)
<< "Returned:" << DataBuffer(decrypted.data(), decrypted.size());
}
};
private:
void RunGroup(JsonReader& r) {
std::vector<RsaDecryptTestVector> tests;
std::vector<uint8_t> private_key;
while (r.NextItem()) {
std::string n = r.ReadLabel();
if (n == "") {
break;
}
if (n == "d" || n == "e" || n == "keysize" || n == "n" ||
n == "privateKeyJwk" || n == "privateKeyPem") {
r.SkipValue();
} else if (n == "privateKeyPkcs8") {
private_key = r.ReadHex();
} else if (n == "type") {
ASSERT_EQ("RsaesPkcs1Decrypt", r.ReadString());
} else if (n == "tests") {
WycheproofReadTests(r, &tests, ReadTestAttr, false,
[](RsaDecryptTestVector& t, const std::string&,
const std::vector<std::string>& flags) {
t.invalid_padding =
std::find(flags.begin(), flags.end(),
"InvalidPkcs1Padding") !=
flags.end();
});
} else {
FAIL() << "unknown label in group: " << n;
}
}
for (auto& t : tests) {
std::cout << "Running test " << t.id << std::endl;
t.priv_key = private_key;
TestDecrypt(t);
}
}
static void ReadTestAttr(RsaDecryptTestVector& t, const std::string& n,
JsonReader& r) {
if (n == "msg") {
t.msg = r.ReadHex();
} else if (n == "ct") {
t.ct = r.ReadHex();
} else {
FAIL() << "unsupported test case field: " << n;
}
}
};
TEST_F(RsaDecryptWycheproofTest, Rsa2048) { Run("rsa_pkcs1_2048"); }
TEST_F(RsaDecryptWycheproofTest, Rsa3072) { Run("rsa_pkcs1_3072"); }
TEST_F(RsaDecryptWycheproofTest, Rsa4096) { Run("rsa_pkcs1_4096"); }
TEST_F(RsaDecryptWycheproofTest, Bb2048) {
for (auto& t : kRsaBb2048Vectors) {
RsaDecryptTestVector copy = t;
copy.priv_key = kRsaBb2048;
TestDecrypt(copy);
}
}
TEST_F(RsaDecryptWycheproofTest, Bb2049) {
for (auto& t : kRsaBb2049Vectors) {
RsaDecryptTestVector copy = t;
copy.priv_key = kRsaBb2049;
TestDecrypt(copy);
}
}
TEST_F(RsaDecryptWycheproofTest, Bb3072) {
for (auto& t : kRsaBb3072Vectors) {
RsaDecryptTestVector copy = t;
copy.priv_key = kRsaBb3072;
TestDecrypt(copy);
}
}
TEST(RsaEncryptTest, MessageLengths) {
const uint8_t spki[] = {
0x30, 0x81, 0x9f, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7,
0x0d, 0x01, 0x01, 0x01, 0x05, 0x00, 0x03, 0x81, 0x8d, 0x00, 0x30, 0x81,
0x89, 0x02, 0x81, 0x81, 0x00, 0xf8, 0xb8, 0x6c, 0x83, 0xb4, 0xbc, 0xd9,
0xa8, 0x57, 0xc0, 0xa5, 0xb4, 0x59, 0x76, 0x8c, 0x54, 0x1d, 0x79, 0xeb,
0x22, 0x52, 0x04, 0x7e, 0xd3, 0x37, 0xeb, 0x41, 0xfd, 0x83, 0xf9, 0xf0,
0xa6, 0x85, 0x15, 0x34, 0x75, 0x71, 0x5a, 0x84, 0xa8, 0x3c, 0xd2, 0xef,
0x5a, 0x4e, 0xd3, 0xde, 0x97, 0x8a, 0xdd, 0xff, 0xbb, 0xcf, 0x0a, 0xaa,
0x86, 0x92, 0xbe, 0xb8, 0x50, 0xe4, 0xcd, 0x6f, 0x80, 0x33, 0x30, 0x76,
0x13, 0x8f, 0xca, 0x7b, 0xdc, 0xec, 0x5a, 0xca, 0x63, 0xc7, 0x03, 0x25,
0xef, 0xa8, 0x8a, 0x83, 0x58, 0x76, 0x20, 0xfa, 0x16, 0x77, 0xd7, 0x79,
0x92, 0x63, 0x01, 0x48, 0x1a, 0xd8, 0x7b, 0x67, 0xf1, 0x52, 0x55, 0x49,
0x4e, 0xd6, 0x6e, 0x4a, 0x5c, 0xd7, 0x7a, 0x37, 0x36, 0x0c, 0xde, 0xdd,
0x8f, 0x44, 0xe8, 0xc2, 0xa7, 0x2c, 0x2b, 0xb5, 0xaf, 0x64, 0x4b, 0x61,
0x07, 0x02, 0x03, 0x01, 0x00, 0x01,
};
// Import public key (use pre-generated for performance).
SECItem spki_item = {siBuffer, toUcharPtr(spki), sizeof(spki)};
ScopedCERTSubjectPublicKeyInfo cert_spki(
SECKEY_DecodeDERSubjectPublicKeyInfo(&spki_item));
ASSERT_TRUE(cert_spki);
ScopedSECKEYPublicKey pub_key(SECKEY_ExtractPublicKey(cert_spki.get()));
ASSERT_TRUE(pub_key);
int mod_len = SECKEY_PublicKeyStrength(pub_key.get());
ASSERT_TRUE(mod_len > 0);
std::vector<uint8_t> ctxt(mod_len);
unsigned int ctxt_len;
std::vector<uint8_t> msg(mod_len, 0xff);
// Test with valid inputs
SECStatus rv =
PK11_PubEncrypt(pub_key.get(), CKM_RSA_PKCS, nullptr, ctxt.data(),
&ctxt_len, mod_len, msg.data(), 1, nullptr);
ASSERT_EQ(SECSuccess, rv);
// Maximum message length is mod_len - miniumum padding (8B) - flags (3B)
unsigned int max_msg_len = mod_len - 8 - 3;
rv = PK11_PubEncrypt(pub_key.get(), CKM_RSA_PKCS, nullptr, ctxt.data(),
&ctxt_len, mod_len, msg.data(), max_msg_len, nullptr);
ASSERT_EQ(SECSuccess, rv);
// Test one past maximum length
rv =
PK11_PubEncrypt(pub_key.get(), CKM_RSA_PKCS, nullptr, ctxt.data(),
&ctxt_len, mod_len, msg.data(), max_msg_len + 1, nullptr);
ASSERT_EQ(SECFailure, rv);
// Make sure the the length will not overflow - i.e.
// (padLen = modulusLen - (UINT_MAX + MINIMUM_PAD_LEN)) may overflow and
// result in a value that appears valid.
rv = PK11_PubEncrypt(pub_key.get(), CKM_RSA_PKCS, nullptr, ctxt.data(),
&ctxt_len, UINT_MAX, msg.data(), UINT_MAX, nullptr);
ASSERT_EQ(SECFailure, rv);
}
} // namespace nss_test
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