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(Tcl) TOTP Algorithm: Time-Based One-Time Password Algorithm

Demonstrates how to generate an time-based one-time password (TOTP) as specified in RFC 6238. This is the algorithm used by Google Authenticator.

Note: This example requires Chilkat v9.5.0.77 or greater.

Chilkat Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

set crypt [new_CkCrypt2]

# Duplicate the following results from RFC 6238

# TOTP Algorithm: Test Values
# 
# +-------------+--------------+------------------+----------+--------+
# |  Time (sec) |   UTC Time   | Value of T (hex) |   TOTP   |  Mode  |
# +-------------+--------------+------------------+----------+--------+
# |      59     |  1970-01-01  | 0000000000000001 | 94287082 |  SHA1  |
# |             |   00:00:59   |                  |          |        |
# |      59     |  1970-01-01  | 0000000000000001 | 46119246 | SHA256 |
# |             |   00:00:59   |                  |          |        |
# |      59     |  1970-01-01  | 0000000000000001 | 90693936 | SHA512 |
# |             |   00:00:59   |                  |          |        |
# |  1111111109 |  2005-03-18  | 00000000023523EC | 07081804 |  SHA1  |
# |             |   01:58:29   |                  |          |        |
# |  1111111109 |  2005-03-18  | 00000000023523EC | 68084774 | SHA256 |
# |             |   01:58:29   |                  |          |        |
# |  1111111109 |  2005-03-18  | 00000000023523EC | 25091201 | SHA512 |
# |             |   01:58:29   |                  |          |        |
# |  1111111111 |  2005-03-18  | 00000000023523ED | 14050471 |  SHA1  |
# |             |   01:58:31   |                  |          |        |
# |  1111111111 |  2005-03-18  | 00000000023523ED | 67062674 | SHA256 |
# |             |   01:58:31   |                  |          |        |
# |  1111111111 |  2005-03-18  | 00000000023523ED | 99943326 | SHA512 |
# |             |   01:58:31   |                  |          |        |
# |  1234567890 |  2009-02-13  | 000000000273EF07 | 89005924 |  SHA1  |
# |             |   23:31:30   |                  |          |        |
# |  1234567890 |  2009-02-13  | 000000000273EF07 | 91819424 | SHA256 |
# |             |   23:31:30   |                  |          |        |
# |  1234567890 |  2009-02-13  | 000000000273EF07 | 93441116 | SHA512 |
# |             |   23:31:30   |                  |          |        |
# |  2000000000 |  2033-05-18  | 0000000003F940AA | 69279037 |  SHA1  |
# |             |   03:33:20   |                  |          |        |
# |  2000000000 |  2033-05-18  | 0000000003F940AA | 90698825 | SHA256 |
# |             |   03:33:20   |                  |          |        |
# |  2000000000 |  2033-05-18  | 0000000003F940AA | 38618901 | SHA512 |
# |             |   03:33:20   |                  |          |        |
# | 20000000000 |  2603-10-11  | 0000000027BC86AA | 65353130 |  SHA1  |
# |             |   11:33:20   |                  |          |        |
# | 20000000000 |  2603-10-11  | 0000000027BC86AA | 77737706 | SHA256 |
# |             |   11:33:20   |                  |          |        |
# | 20000000000 |  2603-10-11  | 0000000027BC86AA | 47863826 | SHA512 |
# |             |   11:33:20   |                  |          |        |
# +-------------+--------------+------------------+----------+--------+

# Seed for HMAC-SHA1
set seed "3132333435363738393031323334353637383930"

# Seed for HMAC-SHA256 - 32 bytes
set seed32 "3132333435363738393031323334353637383930313233343536373839303132"

# Seed for HMAC-SHA512 - 64 bytes
set seed64 "31323334353637383930313233343536373839303132333435363738393031323334353637383930313233343536373839303132333435363738393031323334"

# See the online reference documentation for an explanation of arguments.
puts "TOTP(59,sha1) [CkCrypt2_totp $crypt $seed hex 0 59 30 8 -1 sha1]"
puts "TOTP(59,sha256) [CkCrypt2_totp $crypt $seed32 hex 0 59 30 8 -1 sha256]"
puts "TOTP(59,sha512) [CkCrypt2_totp $crypt $seed64 hex 0 59 30 8 -1 sha512]"

puts "TOTP(1111111109,sha1) [CkCrypt2_totp $crypt $seed hex 0 1111111109 30 8 -1 sha1]"
puts "TOTP(1111111109,sha256) [CkCrypt2_totp $crypt $seed32 hex 0 1111111109 30 8 -1 sha256]"
puts "TOTP(1111111109,sha512) [CkCrypt2_totp $crypt $seed64 hex 0 1111111109 30 8 -1 sha512]"

puts "TOTP(1111111111,sha1) [CkCrypt2_totp $crypt $seed hex 0 1111111111 30 8 -1 sha1]"
puts "TOTP(1111111111,sha256) [CkCrypt2_totp $crypt $seed32 hex 0 1111111111 30 8 -1 sha256]"
puts "TOTP(1111111111,sha512) [CkCrypt2_totp $crypt $seed64 hex 0 1111111111 30 8 -1 sha512]"

puts "TOTP(1234567890,sha1) [CkCrypt2_totp $crypt $seed hex 0 1234567890 30 8 -1 sha1]"
puts "TOTP(1234567890,sha256) [CkCrypt2_totp $crypt $seed32 hex 0 1234567890 30 8 -1 sha256]"
puts "TOTP(1234567890,sha512) [CkCrypt2_totp $crypt $seed64 hex 0 1234567890 30 8 -1 sha512]"

puts "TOTP(2000000000,sha1) [CkCrypt2_totp $crypt $seed hex 0 2000000000 30 8 -1 sha1]"
puts "TOTP(2000000000,sha256) [CkCrypt2_totp $crypt $seed32 hex 0 2000000000 30 8 -1 sha256]"
puts "TOTP(2000000000,sha512) [CkCrypt2_totp $crypt $seed64 hex 0 2000000000 30 8 -1 sha512]"

puts "TOTP(20000000000,sha1) [CkCrypt2_totp $crypt $seed hex 0 20000000000 30 8 -1 sha1]"
puts "TOTP(20000000000,sha256) [CkCrypt2_totp $crypt $seed32 hex 0 20000000000 30 8 -1 sha256]"
puts "TOTP(20000000000,sha512) [CkCrypt2_totp $crypt $seed64 hex 0 20000000000 30 8 -1 sha512]"

# Note: To compute the TOTP using the current system date/time, pass an empty string instead of an explicit time.
# For example:
puts "TOTP(CurrentSystemTime,sha1) [CkCrypt2_totp $crypt $seed hex 0  30 8 -1 sha1]"
puts "TOTP(CurrentSystemTime,sha256) [CkCrypt2_totp $crypt $seed32 hex 0  30 8 -1 sha256]"
puts "TOTP(CurrentSystemTime,sha512) [CkCrypt2_totp $crypt $seed64 hex 0  30 8 -1 sha512]"

delete_CkCrypt2 $crypt

 

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