Class: CryptoGost3410::Verifier

Inherits:
Object
  • Object
show all
Defined in:
lib/crypto_gost3410/verifier.rb

Overview

DigitalSignature

Author:

  • vblazhnovgit

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(group) ⇒ Verifier

Returns a new instance of Verifier.



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# File 'lib/crypto_gost3410/verifier.rb', line 8

def initialize(group)
  @group = group
end

Instance Attribute Details

#group ⇒ Object (readonly)

Returns the value of attribute group.



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# File 'lib/crypto_gost3410/verifier.rb', line 6

def group
  @group
end

Instance Method Details

#verify(hash, public_key, signature) ⇒ Object 



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# File 'lib/crypto_gost3410/verifier.rb', line 12

def verify(hash, public_key, signature)
  @public_key = public_key
  r = signature.x
  s = signature.y
  return false if invalid_vector?(r) || invalid_vector?(s)
  (c_param(hash, public_key, r, s).x % group.order) == r
end