.TH rotp 1 "May 2015"
.SH NAME
.PP
rotp \- Ruby library for generating and verifying one time passwords
.SH SYNOPSIS
.B rotp
[options]
.PP
.SH DESCRIPTION
.PP
A Ruby library for generating and verifying one time passwords. It works for 
both HOTP and TOTP, and includes QR Code provisioning
.SH OPTIONS
.TP
.fi
.B
\-s, \-\-secret \fI[SECRET]\fP
The shared secret
.TP
.fi
.B
\-c, \-\-counter \fI[COUNTER]\fP
The counter for counter-based hmac OTP
.TP
.fi
.B
\-t, \-\-time
Use time-based OTP according to RFC 6238 (default)
.TP
.fi
.B
\-m, \-\-hmac
Use counter-based OTP according to RFC 4226
.TP
.fi
.B
\-h, \-\-help
Show help

.SH Examples
.PP
rotp \-\-secret p4ssword                       # Generates a time-based one-time password
.PP
rotp \-\-hmac \-\-secret p4ssword \-\-counter 42   # Generates a counter-based one-time password

.SH SEE ALSO
.PP
/usr/share/doc/ruby-rotp/index.html