Class: SshSig::Signature

Inherits:
Object
  • Object
show all
Defined in:
lib/ssh_sig/signature.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(algorithm:, bytes:) ⇒ Signature

Returns a new instance of Signature.



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# File 'lib/ssh_sig/signature.rb', line 6

def initialize(
  algorithm:,
  bytes:
)
  @algorithm = algorithm
  @bytes = bytes
end

Instance Attribute Details

#algorithm ⇒ Object (readonly)

Returns the value of attribute algorithm.



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# File 'lib/ssh_sig/signature.rb', line 4

def algorithm
  @algorithm
end

#bytes ⇒ Object (readonly)

Returns the value of attribute bytes.



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# File 'lib/ssh_sig/signature.rb', line 4

def bytes
  @bytes
end

Class Method Details

.from_bytes(blob) ⇒ Object

While not described well in the protocol documenation, the signature has two parts. There is a string describing the algorithm, which can be one of ssh-ed25519, rsa-sha2-512, or rsa-sha2-256, followed by the actual signature bytes.

string algorithm string signature_bytes

Raises:



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# File 'lib/ssh_sig/signature.rb', line 21

def self.from_bytes(blob)
  buf = ::Net::SSH::Buffer.new(blob)

  algorithm = buf.read_string

  raise DecodeError, 'Signature algorithm is missing' if algorithm.nil?

  bytes = buf.read_string

  raise DecodeError, 'Signature data is missing' if bytes.nil?

  Signature.new(
    algorithm: algorithm,
    bytes: bytes
  )
end