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Diffstat (limited to 'src/wallet/test/crypto_tests.cpp')
| -rw-r--r-- | src/wallet/test/crypto_tests.cpp | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/wallet/test/crypto_tests.cpp b/src/wallet/test/crypto_tests.cpp new file mode 100644 index 0000000000..05387f5f2b --- /dev/null +++ b/src/wallet/test/crypto_tests.cpp @@ -0,0 +1,230 @@ +// Copyright (c) 2014 The Bitcoin Core developers +// Distributed under the MIT software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#include "random.h" +#include "utilstrencodings.h" +#include "test/test_bitcoin.h" +#include "wallet/crypter.h" + +#include <vector> + +#include <boost/test/unit_test.hpp> +#include <openssl/aes.h> +#include <openssl/evp.h> + +BOOST_FIXTURE_TEST_SUITE(wallet_crypto, BasicTestingSetup) + +bool OldSetKeyFromPassphrase(const SecureString& strKeyData, const std::vector<unsigned char>& chSalt, const unsigned int nRounds, const unsigned int nDerivationMethod, unsigned char* chKey, unsigned char* chIV) +{ + if (nRounds < 1 || chSalt.size() != WALLET_CRYPTO_SALT_SIZE) + return false; + + int i = 0; + if (nDerivationMethod == 0) + i = EVP_BytesToKey(EVP_aes_256_cbc(), EVP_sha512(), &chSalt[0], + (unsigned char *)&strKeyData[0], strKeyData.size(), nRounds, chKey, chIV); + + if (i != (int)WALLET_CRYPTO_KEY_SIZE) + { + memory_cleanse(chKey, sizeof(chKey)); + memory_cleanse(chIV, sizeof(chIV)); + return false; + } + return true; +} + +bool OldEncrypt(const CKeyingMaterial& vchPlaintext, std::vector<unsigned char> &vchCiphertext, const unsigned char chKey[32], const unsigned char chIV[16]) +{ + // max ciphertext len for a n bytes of plaintext is + // n + AES_BLOCK_SIZE - 1 bytes + int nLen = vchPlaintext.size(); + int nCLen = nLen + AES_BLOCK_SIZE, nFLen = 0; + vchCiphertext = std::vector<unsigned char> (nCLen); + + EVP_CIPHER_CTX ctx; + + bool fOk = true; + + EVP_CIPHER_CTX_init(&ctx); + if (fOk) fOk = EVP_EncryptInit_ex(&ctx, EVP_aes_256_cbc(), NULL, chKey, chIV) != 0; + if (fOk) fOk = EVP_EncryptUpdate(&ctx, &vchCiphertext[0], &nCLen, &vchPlaintext[0], nLen) != 0; + if (fOk) fOk = EVP_EncryptFinal_ex(&ctx, (&vchCiphertext[0]) + nCLen, &nFLen) != 0; + EVP_CIPHER_CTX_cleanup(&ctx); + + if (!fOk) return false; + + vchCiphertext.resize(nCLen + nFLen); + return true; +} + +bool OldDecrypt(const std::vector<unsigned char>& vchCiphertext, CKeyingMaterial& vchPlaintext, const unsigned char chKey[32], const unsigned char chIV[16]) +{ + // plaintext will always be equal to or lesser than length of ciphertext + int nLen = vchCiphertext.size(); + int nPLen = nLen, nFLen = 0; + + vchPlaintext = CKeyingMaterial(nPLen); + + EVP_CIPHER_CTX ctx; + + bool fOk = true; + + EVP_CIPHER_CTX_init(&ctx); + if (fOk) fOk = EVP_DecryptInit_ex(&ctx, EVP_aes_256_cbc(), NULL, chKey, chIV) != 0; + if (fOk) fOk = EVP_DecryptUpdate(&ctx, &vchPlaintext[0], &nPLen, &vchCiphertext[0], nLen) != 0; + if (fOk) fOk = EVP_DecryptFinal_ex(&ctx, (&vchPlaintext[0]) + nPLen, &nFLen) != 0; + EVP_CIPHER_CTX_cleanup(&ctx); + + if (!fOk) return false; + + vchPlaintext.resize(nPLen + nFLen); + return true; +} + +class TestCrypter +{ +public: +static void TestPassphraseSingle(const std::vector<unsigned char>& vchSalt, const SecureString& passphrase, uint32_t rounds, + const std::vector<unsigned char>& correctKey = std::vector<unsigned char>(), + const std::vector<unsigned char>& correctIV=std::vector<unsigned char>()) +{ + unsigned char chKey[WALLET_CRYPTO_KEY_SIZE]; + unsigned char chIV[WALLET_CRYPTO_IV_SIZE]; + + CCrypter crypt; + crypt.SetKeyFromPassphrase(passphrase, vchSalt, rounds, 0); + + OldSetKeyFromPassphrase(passphrase, vchSalt, rounds, 0, chKey, chIV); + + BOOST_CHECK_MESSAGE(memcmp(chKey, crypt.chKey, sizeof(chKey)) == 0, \ + HexStr(chKey, chKey+sizeof(chKey)) + std::string(" != ") + HexStr(crypt.chKey, crypt.chKey + (sizeof crypt.chKey))); + BOOST_CHECK_MESSAGE(memcmp(chIV, crypt.chIV, sizeof(chIV)) == 0, \ + HexStr(chIV, chIV+sizeof(chIV)) + std::string(" != ") + HexStr(crypt.chIV, crypt.chIV + (sizeof crypt.chIV))); + + if(!correctKey.empty()) + BOOST_CHECK_MESSAGE(memcmp(chKey, &correctKey[0], sizeof(chKey)) == 0, \ + HexStr(chKey, chKey+sizeof(chKey)) + std::string(" != ") + HexStr(correctKey.begin(), correctKey.end())); + if(!correctIV.empty()) + BOOST_CHECK_MESSAGE(memcmp(chIV, &correctIV[0], sizeof(chIV)) == 0, + HexStr(chIV, chIV+sizeof(chIV)) + std::string(" != ") + HexStr(correctIV.begin(), correctIV.end())); +} + +static void TestPassphrase(const std::vector<unsigned char>& vchSalt, const SecureString& passphrase, uint32_t rounds, + const std::vector<unsigned char>& correctKey = std::vector<unsigned char>(), + const std::vector<unsigned char>& correctIV=std::vector<unsigned char>()) +{ + TestPassphraseSingle(vchSalt, passphrase, rounds, correctKey, correctIV); + for(SecureString::const_iterator i(passphrase.begin()); i != passphrase.end(); ++i) + TestPassphraseSingle(vchSalt, SecureString(i, passphrase.end()), rounds); +} + + +static void TestDecrypt(const CCrypter& crypt, const std::vector<unsigned char>& vchCiphertext, \ + const std::vector<unsigned char>& vchPlaintext = std::vector<unsigned char>()) +{ + CKeyingMaterial vchDecrypted1; + CKeyingMaterial vchDecrypted2; + int result1, result2; + result1 = crypt.Decrypt(vchCiphertext, vchDecrypted1); + result2 = OldDecrypt(vchCiphertext, vchDecrypted2, crypt.chKey, crypt.chIV); + BOOST_CHECK(result1 == result2); + + // These two should be equal. However, OpenSSL 1.0.1j introduced a change + // that would zero all padding except for the last byte for failed decrypts. + // This behavior was reverted for 1.0.1k. + if (vchDecrypted1 != vchDecrypted2 && vchDecrypted1.size() >= AES_BLOCK_SIZE && SSLeay() == 0x100010afL) + { + for(CKeyingMaterial::iterator it = vchDecrypted1.end() - AES_BLOCK_SIZE; it != vchDecrypted1.end() - 1; it++) + *it = 0; + } + + BOOST_CHECK_MESSAGE(vchDecrypted1 == vchDecrypted2, HexStr(vchDecrypted1.begin(), vchDecrypted1.end()) + " != " + HexStr(vchDecrypted2.begin(), vchDecrypted2.end())); + + if (vchPlaintext.size()) + BOOST_CHECK(CKeyingMaterial(vchPlaintext.begin(), vchPlaintext.end()) == vchDecrypted2); +} + +static void TestEncryptSingle(const CCrypter& crypt, const CKeyingMaterial& vchPlaintext, + const std::vector<unsigned char>& vchCiphertextCorrect = std::vector<unsigned char>()) +{ + std::vector<unsigned char> vchCiphertext1; + std::vector<unsigned char> vchCiphertext2; + int result1 = crypt.Encrypt(vchPlaintext, vchCiphertext1); + + int result2 = OldEncrypt(vchPlaintext, vchCiphertext2, crypt.chKey, crypt.chIV); + BOOST_CHECK(result1 == result2); + BOOST_CHECK(vchCiphertext1 == vchCiphertext2); + + if (!vchCiphertextCorrect.empty()) + BOOST_CHECK(vchCiphertext2 == vchCiphertextCorrect); + + const std::vector<unsigned char> vchPlaintext2(vchPlaintext.begin(), vchPlaintext.end()); + + if(vchCiphertext1 == vchCiphertext2) + TestDecrypt(crypt, vchCiphertext1, vchPlaintext2); +} + +static void TestEncrypt(const CCrypter& crypt, const std::vector<unsigned char>& vchPlaintextIn, \ + const std::vector<unsigned char>& vchCiphertextCorrect = std::vector<unsigned char>()) +{ + TestEncryptSingle(crypt, CKeyingMaterial(vchPlaintextIn.begin(), vchPlaintextIn.end()), vchCiphertextCorrect); + for(std::vector<unsigned char>::const_iterator i(vchPlaintextIn.begin()); i != vchPlaintextIn.end(); ++i) + TestEncryptSingle(crypt, CKeyingMaterial(i, vchPlaintextIn.end())); +} + +}; + +BOOST_AUTO_TEST_CASE(passphrase) { + // These are expensive. + + TestCrypter::TestPassphrase(ParseHex("0000deadbeef0000"), "test", 25000, \ + ParseHex("fc7aba077ad5f4c3a0988d8daa4810d0d4a0e3bcb53af662998898f33df0556a"), \ + ParseHex("cf2f2691526dd1aa220896fb8bf7c369")); + + std::string hash(GetRandHash().ToString()); + std::vector<unsigned char> vchSalt(8); + GetRandBytes(&vchSalt[0], vchSalt.size()); + uint32_t rounds = insecure_rand(); + if (rounds > 30000) + rounds = 30000; + TestCrypter::TestPassphrase(vchSalt, SecureString(hash.begin(), hash.end()), rounds); +} + +BOOST_AUTO_TEST_CASE(encrypt) { + std::vector<unsigned char> vchSalt = ParseHex("0000deadbeef0000"); + BOOST_CHECK(vchSalt.size() == WALLET_CRYPTO_SALT_SIZE); + CCrypter crypt; + crypt.SetKeyFromPassphrase("passphrase", vchSalt, 25000, 0); + TestCrypter::TestEncrypt(crypt, ParseHex("22bcade09ac03ff6386914359cfe885cfeb5f77ff0d670f102f619687453b29d")); + + for (int i = 0; i != 100; i++) + { + uint256 hash(GetRandHash()); + TestCrypter::TestEncrypt(crypt, std::vector<unsigned char>(hash.begin(), hash.end())); + } + +} + +BOOST_AUTO_TEST_CASE(decrypt) { + std::vector<unsigned char> vchSalt = ParseHex("0000deadbeef0000"); + BOOST_CHECK(vchSalt.size() == WALLET_CRYPTO_SALT_SIZE); + CCrypter crypt; + crypt.SetKeyFromPassphrase("passphrase", vchSalt, 25000, 0); + + // Some corner cases the came up while testing + TestCrypter::TestDecrypt(crypt,ParseHex("795643ce39d736088367822cdc50535ec6f103715e3e48f4f3b1a60a08ef59ca")); + TestCrypter::TestDecrypt(crypt,ParseHex("de096f4a8f9bd97db012aa9d90d74de8cdea779c3ee8bc7633d8b5d6da703486")); + TestCrypter::TestDecrypt(crypt,ParseHex("32d0a8974e3afd9c6c3ebf4d66aa4e6419f8c173de25947f98cf8b7ace49449c")); + TestCrypter::TestDecrypt(crypt,ParseHex("e7c055cca2faa78cb9ac22c9357a90b4778ded9b2cc220a14cea49f931e596ea")); + TestCrypter::TestDecrypt(crypt,ParseHex("b88efddd668a6801d19516d6830da4ae9811988ccbaf40df8fbb72f3f4d335fd")); + TestCrypter::TestDecrypt(crypt,ParseHex("8cae76aa6a43694e961ebcb28c8ca8f8540b84153d72865e8561ddd93fa7bfa9")); + + for (int i = 0; i != 100; i++) + { + uint256 hash(GetRandHash()); + TestCrypter::TestDecrypt(crypt, std::vector<unsigned char>(hash.begin(), hash.end())); + } +} + +BOOST_AUTO_TEST_SUITE_END() |