static int
crypto( RSA *rsa,
bool decrypt,
const bytes_t &bytes,
bytes_t &crypt )
{
fprintf(stderr, "bytes: %d\n", static_cast<int>(bytes.size()));
fprintf(stderr, "RSA_size: %d\n", RSA_size(rsa));
typedef int (*cryptop_t) (int, const unsigned char*, unsigned char*, RSA*, int);
cryptop_t cryptOp = ( decrypt ? RSA_private_decrypt : RSA_public_encrypt );
const size_t len = bytes.size(),
rsaSz = RSA_size(rsa),
blen = rsaSz - ( decrypt ? 0 : 11 );
size_t tNum = 0;
bytes_t buf( rsaSz );
while ( tNum < len )
{
int num = ( decrypt ? blen : (std::min)(blen, len-tNum) );
fprintf(stderr, "request: %d bytes\n", num);
num = cryptOp(num, &bytes[tNum], &buf[0], rsa, RSA_PKCS1_PADDING);
fprintf(stderr, "crypted: %d bytes\n", num);
if ( num < 0 )
return ( -1 );
else if ( num == 0 )
return ( 0 );
const size_t oldSZ = crypt.size(),
addSZ = ( decrypt ? num : rsaSz );
crypt.resize(oldSZ + addSZ);
::memcpy(&crypt[oldSZ], &buf[0], addSZ);
tNum += blen; //( decrypt ? rsaSz : blen );
}
fprintf(stderr, "Crypted: %d bytes, crypt size: %d\n", static_cast<int>(tNum), static_cast<int>(crypt.size()));
return ( tNum == 0 );
}
explicit input_stream(bytes_t const& from)
: begin_(from.data())
, end_ (from.data() + from.size())
, cur_ (from.data())
{
}
size_t size() const
{
return bytes.size();
}