Chris Danford
68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
#include "sha.h"
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#include "files.h"
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#include "hex.h"
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#include "channels.h"
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#include "rsa.h"
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#include "md5.h"
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#include "randpool.h"
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#include <memory>
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using namespace CryptoPP;
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using namespace std;
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void GenerateRSAKey(unsigned int keyLength, const char *privFilename, const char *pubFilename, const char *seed)
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{
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RandomPool randPool;
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randPool.Put((byte *)seed, strlen(seed));
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RSAES_OAEP_SHA_Decryptor priv(randPool, keyLength);
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HexEncoder privFile(new FileSink(privFilename));
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priv.DEREncode(privFile);
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privFile.MessageEnd();
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RSAES_OAEP_SHA_Encryptor pub(priv);
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HexEncoder pubFile(new FileSink(pubFilename));
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pub.DEREncode(pubFile);
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pubFile.MessageEnd();
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}
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void RSASignFile(const char *privFilename, const char *messageFilename, const char *signatureFilename)
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{
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FileSource privFile(privFilename, true, new HexDecoder);
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RSASSA_PKCS1v15_SHA_Signer priv(privFile);
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RandomNumberGenerator &rng = RandomPool();
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FileSource f(messageFilename, true, new SignerFilter(rng, priv, new HexEncoder(new FileSink(signatureFilename))));
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}
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bool RSAVerifyFile(const char *pubFilename, const char *messageFilename, const char *signatureFilename)
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{
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FileSource pubFile(pubFilename, true, new HexDecoder);
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RSASSA_PKCS1v15_SHA_Verifier pub(pubFile);
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FileSource signatureFile(signatureFilename, true, new HexDecoder);
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if (signatureFile.MaxRetrievable() != pub.SignatureLength())
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return false;
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SecByteBlock signature(pub.SignatureLength());
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signatureFile.Get(signature, signature.size());
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VerifierFilter *verifierFilter = new VerifierFilter(pub);
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verifierFilter->Put(signature, pub.SignatureLength());
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FileSource f(messageFilename, true, verifierFilter);
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return verifierFilter->GetLastResult();
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}
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void DigestFile(const char *filename)
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{
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MD5 md5;
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HashFilter md5Filter(md5);
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auto_ptr<ChannelSwitch> channelSwitch(new ChannelSwitch);
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channelSwitch->AddDefaultRoute(md5Filter);
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FileSource(filename, true, channelSwitch.release());
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HexEncoder encoder(new FileSink(cout), false);
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cout << "\nMD5: ";
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md5Filter.TransferTo(encoder);
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}
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