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oath_hotp_generate(3) liboath oath_hotp_generate(3) NAME oath_hotp_generate - API function SYNOPSIS #include <oath.h> int oath_hotp_generate(const char * secret, size_t secret_length, uint64_t moving_factor, unsigned digits, bool add_checksum, size_t truncation_offset, char * output_otp); ARGUMENTS const char * secret the shared secret string size_t secret_length length of secret uint64_t moving_factor a counter indicating the current OTP to generate unsigned digits number of requested digits in the OTP, excluding checksum bool add_checksum whether to add a checksum digit or not size_t truncation_offset use a specific truncation offset char * output_otp output buffer, must have room for the output OTP plus zero DESCRIPTION Generate a one-time-password using the HOTP algorithm as described in RFC 4226. Use a value of OATH_HOTP_DYNAMIC_TRUNCATION for truncation_offset un- less you really need a specific truncation offset. To find out the size of the OTP you may use the OATH_HOTP_LENGTH() macro. The output_otp buffer must be have room for that length plus one for the terminating NUL. Currently only values 6, 7 and 8 for digits are supported, and the add_checksum value is ignored. These restrictions may be lifted in fu- ture versions, although some limitations are inherent in the protocol. RETURNS On success, OATH_OK (zero) is returned, otherwise an error code is re- turned. 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_hotp_generate(3)
NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURNS | REPORTING BUGS | COPYRIGHT
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