void FIPS140_SampleApplication()
{
if (!FIPS_140_2_ComplianceEnabled())
{
cerr << "FIPS 140-2 compliance was turned off at compile time.\n";
abort();
}
// check self test status
if (GetPowerUpSelfTestStatus() != POWER_UP_SELF_TEST_PASSED)
{
cerr << "Automatic power-up self test failed.\n";
abort();
}
cout << "0. Automatic power-up self test passed.\n";
// simulate a power-up self test error
SimulatePowerUpSelfTestFailure();
try
{
// trying to use a crypto algorithm after power-up self test error will result in an exception
AES::Encryption aes;
// should not be here
cerr << "Use of AES failed to cause an exception after power-up self test error.\n";
abort();
}
catch (SelfTestFailure &e)
{
cout << "1. Caught expected exception when simulating self test failure. Exception message follows: ";
cout << e.what() << endl;
}
// clear the self test error state and redo power-up self test
DoDllPowerUpSelfTest();
if (GetPowerUpSelfTestStatus() != POWER_UP_SELF_TEST_PASSED)
{
cerr << "Re-do power-up self test failed.\n";
abort();
}
cout << "2. Re-do power-up self test passed.\n";
// encrypt and decrypt
const byte key[] = {0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef, 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef, 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef};
const byte iv[] = {0x12,0x34,0x56,0x78,0x90,0xab,0xcd,0xef};
const byte plaintext[] = { // "Now is the time for all " without tailing 0
0x4e,0x6f,0x77,0x20,0x69,0x73,0x20,0x74,
0x68,0x65,0x20,0x74,0x69,0x6d,0x65,0x20,
0x66,0x6f,0x72,0x20,0x61,0x6c,0x6c,0x20};
byte ciphertext[24];
byte decrypted[24];
CFB_FIPS_Mode<DES_EDE3>::Encryption encryption_DES_EDE3_CFB;
encryption_DES_EDE3_CFB.SetKeyWithIV(key, sizeof(key), iv);
encryption_DES_EDE3_CFB.ProcessString(ciphertext, plaintext, 23);
CFB_FIPS_Mode<DES_EDE3>::Decryption decryption_DES_EDE3_CFB;
decryption_DES_EDE3_CFB.SetKeyWithIV(key, sizeof(key), iv);
decryption_DES_EDE3_CFB.ProcessString(decrypted, ciphertext, 24);
if (memcmp(plaintext, decrypted, 24) != 0)
{
cerr << "DES-EDE3-CFB Encryption/decryption failed.\n";
abort();
}
cout << "3. DES-EDE3-CFB Encryption/decryption succeeded.\n";
// hash
const byte message[] = {'a', 'b', 'c'};
const byte expectedDigest[] = {0xA9,0x99,0x3E,0x36,0x47,0x06,0x81,0x6A,0xBA,0x3E,0x25,0x71,0x78,0x50,0xC2,0x6C,0x9C,0xD0,0xD8,0x9D};
byte digest[20];
SHA1 sha;
sha.Update(message, 3);
sha.Final(digest);
if (memcmp(digest, expectedDigest, 20) != 0)
{
cerr << "SHA-1 hash failed.\n";
abort();
}
cout << "4. SHA-1 hash succeeded.\n";
// create auto-seeded X9.17 RNG object, if available
#ifdef OS_RNG_AVAILABLE
AutoSeededX917RNG<DES_EDE3> rng;
#else
// this is used to allow this function to compile on platforms that don't have auto-seeded RNGs
RandomNumberGenerator &rng(NullRNG());
#endif
// generate DSA key
DSA::PrivateKey dsaPrivateKey;
dsaPrivateKey.GenerateRandomWithKeySize(rng, 1024);
DSA::PublicKey dsaPublicKey;
dsaPublicKey.AssignFrom(dsaPrivateKey);
if (!dsaPrivateKey.Validate(rng, 3) || !dsaPublicKey.Validate(rng, 3))
{
cerr << "DSA key generation failed.\n";
abort();
}
cout << "5. DSA key generation succeeded.\n";
// encode DSA key
std::string encodedDsaPublicKey, encodedDsaPrivateKey;
dsaPublicKey.DEREncode(StringSink(encodedDsaPublicKey).Ref());
dsaPrivateKey.DEREncode(StringSink(encodedDsaPrivateKey).Ref());
// decode DSA key
DSA::PrivateKey decodedDsaPrivateKey;
decodedDsaPrivateKey.BERDecode(StringStore(encodedDsaPrivateKey).Ref());
DSA::PublicKey decodedDsaPublicKey;
decodedDsaPublicKey.BERDecode(StringStore(encodedDsaPublicKey).Ref());
if (!decodedDsaPrivateKey.Validate(rng, 3) || !decodedDsaPublicKey.Validate(rng, 3))
{
cerr << "DSA key encode/decode failed.\n";
abort();
}
cout << "6. DSA key encode/decode succeeded.\n";
// sign and verify
byte signature[40];
DSA::Signer signer(dsaPrivateKey);
assert(signer.SignatureLength() == 40);
signer.SignMessage(rng, message, 3, signature);
DSA::Verifier verifier(dsaPublicKey);
if (!verifier.VerifyMessage(message, 3, signature, sizeof(signature)))
{
cerr << "DSA signature and verification failed.\n";
abort();
}
cout << "7. DSA signature and verification succeeded.\n";
// try to verify an invalid signature
signature[0] ^= 1;
if (verifier.VerifyMessage(message, 3, signature, sizeof(signature)))
{
cerr << "DSA signature verification failed to detect bad signature.\n";
abort();
}
cout << "8. DSA signature verification successfully detected bad signature.\n";
// try to use an invalid key length
try
{
ECB_Mode<DES_EDE3>::Encryption encryption_DES_EDE3_ECB;
encryption_DES_EDE3_ECB.SetKey(key, 5);
// should not be here
cerr << "DES-EDE3 implementation did not detect use of invalid key length.\n";
abort();
}
catch (InvalidArgument &e)
{
cout << "9. Caught expected exception when using invalid key length. Exception message follows: ";
cout << e.what() << endl;
}
cout << "\nFIPS 140-2 Sample Application completed normally.\n";
}