void urlsafe_base64decode(const std::string& input,std::string& output){
assert(input.size()<1024);
try {
char buffer[1024];
const char *p = input.c_str();
char *dst = buffer;
while (*p != '\0') {
if (*p == '-') {
*dst = '+';
} else if (*p == '_') {
*dst = '/';
} else {
*dst = *p;
}
p++;
dst++;
}
CryptoPP::Base64Decoder decoder;
decoder.Attach(new CryptoPP::StringSink(output));
decoder.Put((uchar_t *) buffer, input.size());
decoder.MessageEnd();
}catch(exception& e){
DebugMessageWithTime("urlsafe_base64decode failed,e:",e.what());
}
}
void Reseeder::LoadCertificate (const std::string& filename)
{
std::ifstream s(filename, std::ifstream::binary);
if (s.is_open ())
{
s.seekg (0, std::ios::end);
size_t len = s.tellg ();
s.seekg (0, std::ios::beg);
char buf[2048];
s.read (buf, len);
std::string cert (buf, len);
// assume file in pem format
auto pos1 = cert.find (CERTIFICATE_HEADER);
auto pos2 = cert.find (CERTIFICATE_FOOTER);
if (pos1 == std::string::npos || pos2 == std::string::npos)
{
LogPrint (eLogError, "Malformed certificate file");
return;
}
pos1 += strlen (CERTIFICATE_HEADER);
pos2 -= pos1;
std::string base64 = cert.substr (pos1, pos2);
CryptoPP::ByteQueue queue;
CryptoPP::Base64Decoder decoder; // regular base64 rather than I2P
decoder.Attach (new CryptoPP::Redirector (queue));
decoder.Put ((const uint8_t *)base64.data(), base64.length());
decoder.MessageEnd ();
// extract X.509
CryptoPP::BERSequenceDecoder x509Cert (queue);
CryptoPP::BERSequenceDecoder tbsCert (x509Cert);
// version
uint32_t ver;
CryptoPP::BERGeneralDecoder context (tbsCert, 0xa0);
CryptoPP::BERDecodeUnsigned<uint32_t>(context, ver, CryptoPP::INTEGER);
LogPrint (eLogInfo, ver);
// serial
CryptoPP::Integer serial;
serial.BERDecode(tbsCert);
// signature
CryptoPP::BERSequenceDecoder signature (tbsCert);
signature.SkipAll();
// issuer
CryptoPP::BERSequenceDecoder issuer (tbsCert);
issuer.SkipAll();
// validity
CryptoPP::BERSequenceDecoder validity (tbsCert);
validity.SkipAll();
// subject
CryptoPP::BERSequenceDecoder subject (tbsCert);
subject.SkipAll();
// public key
CryptoPP::BERSequenceDecoder publicKey (tbsCert);
publicKey.SkipAll();
tbsCert.SkipAll();
x509Cert.SkipAll();
}
else
LogPrint (eLogError, "Can't open certificate file ", filename);
}