Class: ROTP::OTP
- Inherits:
-
Object
- Object
- ROTP::OTP
- Defined in:
- lib/rotp/otp.rb
Instance Attribute Summary (collapse)
-
- (Object) digest
readonly
Returns the value of attribute digest.
-
- (Object) digits
readonly
Returns the value of attribute digits.
-
- (Object) secret
readonly
Returns the value of attribute secret.
Instance Method Summary (collapse)
-
- (Object) generate_otp(input, padded = true)
Usually either the counter, or the computed integer based on the Unix timestamp.
-
- (OTP) initialize(s, options = {})
constructor
A new instance of OTP.
Constructor Details
- (OTP) initialize(s, options = {})
Returns a new instance of OTP
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# File 'lib/rotp/otp.rb', line 13 def initialize(s, = {}) @digits = [:digits] || 6 @digest = [:digest] || "sha1" @secret = s end |
Instance Attribute Details
- (Object) digest (readonly)
Returns the value of attribute digest
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# File 'lib/rotp/otp.rb', line 3 def digest @digest end |
- (Object) digits (readonly)
Returns the value of attribute digits
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# File 'lib/rotp/otp.rb', line 3 def digits @digits end |
- (Object) secret (readonly)
Returns the value of attribute secret
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# File 'lib/rotp/otp.rb', line 3 def secret @secret end |
Instance Method Details
- (Object) generate_otp(input, padded = true)
Usually either the counter, or the computed integer based on the Unix timestamp
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# File 'lib/rotp/otp.rb', line 23 def generate_otp(input, padded=true) hmac = OpenSSL::HMAC.digest( OpenSSL::Digest.new(digest), byte_secret, int_to_bytestring(input) ) offset = hmac[-1].ord & 0xf code = (hmac[offset].ord & 0x7f) << 24 | (hmac[offset + 1].ord & 0xff) << 16 | (hmac[offset + 2].ord & 0xff) << 8 | (hmac[offset + 3].ord & 0xff) if padded (code % 10 ** digits).to_s.rjust(digits, '0') else code % 10 ** digits end end |