diff options
Diffstat (limited to 'botan/src/pubkey/keypair/keypair.cpp')
-rw-r--r-- | botan/src/pubkey/keypair/keypair.cpp | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/botan/src/pubkey/keypair/keypair.cpp b/botan/src/pubkey/keypair/keypair.cpp new file mode 100644 index 0000000..486577f --- /dev/null +++ b/botan/src/pubkey/keypair/keypair.cpp @@ -0,0 +1,73 @@ +/* +* Keypair Checks +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#include <botan/keypair.h> +#include <botan/look_pk.h> +#include <memory> + +namespace Botan { + +namespace KeyPair { + +/* +* Check an encryption key pair for consistency +*/ +void check_key(RandomNumberGenerator& rng, + PK_Encryptor* encryptor, PK_Decryptor* decryptor) + { + if(encryptor->maximum_input_size() == 0) + return; + + std::auto_ptr<PK_Encryptor> enc(encryptor); + std::auto_ptr<PK_Decryptor> dec(decryptor); + + SecureVector<byte> message(enc->maximum_input_size() - 1); + rng.randomize(message, message.size()); + + SecureVector<byte> ciphertext = enc->encrypt(message, rng); + if(ciphertext == message) + throw Self_Test_Failure("Encryption key pair consistency failure"); + + SecureVector<byte> message2 = dec->decrypt(ciphertext); + if(message != message2) + throw Self_Test_Failure("Encryption key pair consistency failure"); + } + +/* +* Check a signature key pair for consistency +*/ +void check_key(RandomNumberGenerator& rng, + PK_Signer* signer, PK_Verifier* verifier) + { + std::auto_ptr<PK_Signer> sig(signer); + std::auto_ptr<PK_Verifier> ver(verifier); + + SecureVector<byte> message(16); + rng.randomize(message, message.size()); + + SecureVector<byte> signature; + + try + { + signature = sig->sign_message(message, rng); + } + catch(Encoding_Error) + { + return; + } + + if(!ver->verify_message(message, signature)) + throw Self_Test_Failure("Signature key pair consistency failure"); + + ++message[0]; + if(ver->verify_message(message, signature)) + throw Self_Test_Failure("Signature key pair consistency failure"); + } + +} + +} |