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oath_totp_validate4(3) liboath oath_totp_validate4(3) NAME oath_totp_validate4 - API function SYNOPSIS #include <oath.h> int oath_totp_validate4(const char * secret, size_t secret_length, time_t now, unsigned time_step_size, time_t start_offset, size_t win- dow, int * otp_pos, uint64_t * otp_counter, int flags, const char * otp); ARGUMENTS const char * secret the shared secret string size_t secret_length length of secret time_t now Unix time value to validate TOTP for unsigned time_step_size time step system parameter (typically 30) time_t start_offset Unix time of when to start counting time steps (typically 0) size_t window how many OTPs after/before start OTP to test int * otp_pos output search position in search window (may be NULL). uint64_t * otp_counter counter value used to calculate OTP value (may be NULL). int flags flags indicating mode, one of oath_totp_flags const char * otp the OTP to validate. DESCRIPTION Validate an OTP according to OATH TOTP algorithm per RFC 6238. Currently only OTP lengths of 6, 7 or 8 digits are supported. This re- strictions may be lifted in future versions, although some limitations are inherent in the protocol. The flags parameter may be used to change the MAC function, for example OATH_TOTP_HMAC_SHA256 or OATH_TOTP_HMAC_SHA512. RETURNS Returns absolute value of position in OTP window (zero is first posi- tion), or OATH_INVALID_OTP if no OTP was found in OTP window, or an er- ror code. SINCE 2.6.0 REPORTING BUGS Report bugs to <oath-toolkit-help@nongnu.org>. liboath home page: https://www.nongnu.org/oath-toolkit/ General help using GNU software: http://www.gnu.org/gethelp/ COPYRIGHT Copyright (C) 2009-2020 Simon Josefsson. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright no- tice and this notice are preserved. liboath 2.6.9 oath_totp_validate4(3)
NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURNS | SINCE | REPORTING BUGS | COPYRIGHT
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