README.md

One Time Password Generation and Verification

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Github: https://github.com/randy3k/otp

Documentation: https://randy3k.github.io/otp

Generating and validating One-time Password based on Hash-based Message Authentication Code (HOTP) and Time Based One-time Password (TOTP) according to RFC 4226 https://tools.ietf.org/html/rfc4226 and RFC 6238 https://tools.ietf.org/html/rfc6238.

Installation

You can install the released version of otp from CRAN with:

install.packages("otp")

And the development version from GitHub with:

# install.packages("devtools")
devtools::install_github("randy3k/otp")

Example

library(otp)

HMAC based One Time Password (HOTP)

p <- HOTP$new("JBSWY3DPEHPK3PXP")
p$at(8)
## [1] "964230"
p$verify("964230", 8)
## [1] 8

Time based One Time Password (TOTP)

p <- TOTP$new("JBSWY3DPEHPK3PXP")
(code <- p$now())
## [1] "529411"
p$verify(code)
## [1] "2021-11-08 21:19:30 PST"
raster::image(
  qrencoder::qrencode_raster(p$provisioning_uri("otp")),
  asp = 1, col = c("white", "black"), axes = FALSE,
  xlab = "", ylab = ""
)

Related projects



randy3k/otp documentation built on Nov. 10, 2021, 3:08 p.m.