1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
module ROTP
class HOTP < OTP
# Generates the OTP for the given count
# @param [Integer] count counter
# @returns [Integer] OTP
def at(count)
generate_otp(count)
end
# Verifies the OTP passed in against the current time OTP
# @param otp [String/Integer] the OTP to check against
# @param counter [Integer] the counter of the OTP
# @param retries [Integer] number of counters to incrementally retry
def verify(otp, counter, retries: 0)
counters = (counter..counter + retries).to_a
counters.find do |c|
super(otp, at(c))
end
end
# Returns the provisioning URI for the OTP
# This can then be encoded in a QR Code and used
# to provision the Google Authenticator app
# @param [String] name of the account
# @param [Integer] initial_count starting counter value, defaults to 0
# @return [String] provisioning uri
def provisioning_uri(name, initial_count = 0)
OTP::URI.new(self, account_name: name, counter: initial_count).to_s
end
end
end
|
