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#ifndef OTP_H
#define OTP_H
#include <string>
namespace OTP {
namespace Bytes {
typedef uint8_t Byte;
typedef std::basic_string<Byte> ByteString;
void clearByteString(ByteString *bstr);
void swizzleByteString(ByteString *target, ByteString *source);
std::string toHexString(const ByteString &bstr);
ByteString u32beToByteString(uint32_t num);
ByteString u64beToByteString(uint64_t num);
ByteString fromBase32(const std::string &b32str);
ByteString fromUnpaddedBase32(const std::string &b32str);
std::string toBase32(const ByteString &b32str);
class ByteStringDestructor {
private:
/** The byte string to clear. */
ByteString * m_bs;
public:
ByteStringDestructor(ByteString * bs) : m_bs(bs) {}
~ByteStringDestructor() { clearByteString(m_bs); }
};
}
typedef Bytes::ByteString (*HmacFunc)(const Bytes::ByteString &, const Bytes::ByteString &);
Bytes::ByteString sha1(const Bytes::ByteString &msg);
Bytes::ByteString hmacSha1(const Bytes::ByteString &key, const Bytes::ByteString &msg, size_t blockSize = 64);
Bytes::ByteString hmacSha1_64(const Bytes::ByteString &key, const Bytes::ByteString &msg);
uint32_t hotp(const Bytes::ByteString &key, uint64_t counter, size_t digitCount = 6, HmacFunc hmac = hmacSha1_64);
uint32_t totp(const Bytes::ByteString & key, uint64_t timeNow, uint64_t timeStart, uint64_t timeStep, size_t digitCount = 6, HmacFunc hmac = hmacSha1_64);
}
#endif
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