blob: 940f0c02868257dc40396bf3c7b7c9342899e9c5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*************************************************
* Keypair Checks Source File *
* (C) 1999-2007 Jack Lloyd *
*************************************************/
#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");
}
}
}
|
