// converts bytes to BASE64 representation
void base64(Firebird::string& b64, const Firebird::UCharBuffer& bin)
{
b64.erase();
const unsigned char* f = bin.begin();
for (int i = bin.getCount(); i > 0; i -= 3, f += 3)
{
if (i >= 3)
{
const ULONG l = (ULONG(f[0]) << 16) | (ULONG(f[1]) << 8) | f[2];
b64 += conv_bin2ascii(l >> 18);
b64 += conv_bin2ascii(l >> 12);
b64 += conv_bin2ascii(l >> 6);
b64 += conv_bin2ascii(l);
}
else
{
ULONG l = ULONG(f[0]) << 16;
if (i == 2)
l |= (ULONG(f[1]) << 8);
b64 += conv_bin2ascii(l >> 18);
b64 += conv_bin2ascii(l >> 12);
b64 += (i == 1 ? '=' : conv_bin2ascii(l >> 6));
b64 += '=';
}
}
void BigInteger::random(int numBytes)
{
Firebird::UCharBuffer b;
Firebird::GenerateRandomBytes(b.getBuffer(numBytes), numBytes);
assign(numBytes, b.begin());
}
BigInteger::BigInteger(const Firebird::UCharBuffer& val)
{
CHECK_MP(mp_init(&t));
assign(val.getCount(), val.begin());
}