Class: CryptoToolchain::SRP::SimpleClient

Inherits:
Client show all
Includes:
Framework
Defined in:
lib/crypto_toolchain/srp/simple_client.rb

Constant Summary

Constants included from Framework

Framework::EVENT_WHITELIST

Instance Attribute Summary collapse

Attributes included from Framework

#email, #g, #k, #key, #n, #password, #privkey, #pubkey, #salt, #socket

Attributes inherited from Client

#authenticated, #server_pubkey

Instance Method Summary collapse

Methods included from Framework

#error_received, #event_loop, #go!, #shutdown_received, #write_message

Methods inherited from Client

#authentication_success_received, #send_hello, #send_verify

Constructor Details

#initialize(**kargs) ⇒ SimpleClient

Returns a new instance of SimpleClient.



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# File 'lib/crypto_toolchain/srp/simple_client.rb', line 8

def initialize(**kargs)
  provided_pubkey = kargs.delete(:pubkey)
  super(**kargs)
  @pubkey = provided_pubkey || g.modpow(privkey, n)
end

Instance Attribute Details

#u ⇒ Object (readonly)

Returns the value of attribute u.



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# File 'lib/crypto_toolchain/srp/simple_client.rb', line 6

def u
  @u
end

Instance Method Details

#calculate_secret ⇒ Object 



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# File 'lib/crypto_toolchain/srp/simple_client.rb', line 24

def calculate_secret
  xH = Digest::SHA256.hexdigest("#{salt}#{password}")
  x = xH.to_i(16)
  # S = B**(a + ux) % n
  server_pubkey.modpow(privkey + (u * x), n)
end

#hello_received(_salt, _server_pubkey, _u) ⇒ Object 



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# File 'lib/crypto_toolchain/srp/simple_client.rb', line 14

def hello_received(_salt, _server_pubkey, _u)
  @salt = _salt.to_i
  @server_pubkey = _server_pubkey.to_i
  @u = _u.to_i
  secret = calculate_secret
  puts "SimpleClient generated secret #{secret}" if DEBUG
  @key = Digest::SHA256.hexdigest(secret.to_s)
  send_verify
end