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void RSASignFile(const char *privFilename, const char *messageFilename, const char *signatureFilename)
{
FileSource privFile(privFilename, true, new HexDecoder);
RSASS<PKCS1v15, SHA>::Signer priv(privFile);
FileSource f(messageFilename, true, new SignerFilter(GlobalRNG(), priv, new HexEncoder(new FileSink(signatureFilename))));
}
bool RSAVerifyFile(const char *pubFilename, const char *messageFilename, const char *signatureFilename)
{
FileSource pubFile(pubFilename, true, new HexDecoder);
RSASS<PKCS1v15, SHA>::Verifier pub(pubFile);
FileSource signatureFile(signatureFilename, true, new HexDecoder);
if (signatureFile.MaxRetrievable() != pub.SignatureLength())
return false;
SecByteBlock signature(pub.SignatureLength());
signatureFile.Get(signature, signature.size());
VerifierFilter *verifierFilter = new VerifierFilter(pub);
verifierFilter->Put(signature, pub.SignatureLength());
FileSource f(messageFilename, true, verifierFilter);
return verifierFilter->GetLastResult();
}