int oath_hotp_validate(const char * secret, size_t secret_length, uint64_t start_moving_factor, size_t window, const char * otp);
- const char * secret
the shared secret string
- size_t secret_length
length of secret
- uint64_t start_moving_factor
start counter in OTP stream
- size_t window
how many OTPs after start counter to test
- const char * otp
the OTP to validate.
Validate an OTP according to OATH HOTP algorithm per RFC 4226.
Currently only OTP lengths of 6, 7 or 8 digits are supported. This restrictions may be lifted in future versions, although some limitations are inherent in the protocol.
Returns position in OTP window (zero is first position), or OATH_INVALID_OTP if no OTP was found in OTP window, or an error code.
Report bugs to <email@example.com>. liboath home page: http://www.gnu.org/software/liboath/ General help using GNU software: http://www.gnu.org/gethelp/
Copyright © 2009-2020 Simon Josefsson.
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