NAME¶oath_hotp_validate - API function
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.
DESCRIPTION¶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¶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.
REPORTING BUGS¶Report bugs to <email@example.com>. liboath home page: https://www.nongnu.org/oath-toolkit/ General help using GNU software: http://www.gnu.org/gethelp/
COPYRIGHT¶Copyright © 2009-2020 Simon Josefsson.
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.