Class: CryptBuffer

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
CryptBufferConcern::Arithmetic, CryptBufferConcern::ByteExpander, CryptBufferConcern::Comparable, CryptBufferConcern::Convertable, CryptBufferConcern::Padding, CryptBufferConcern::PrettyPrint, CryptBufferConcern::Random, CryptBufferConcern::Xor, Enumerable
Defined in:
lib/crypto-toolbox/crypt_buffer.rb

Defined Under Namespace

Classes: OutOfRangeError

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from CryptBufferConcern::Xor

#xor, #xor_all_with, #xor_at, #xor_space

Methods included from CryptBufferConcern::Random

included

Methods included from CryptBufferConcern::PrettyPrint

#pp

Methods included from CryptBufferConcern::Padding

#pad, #padding, #padding?, #strip_padding

Methods included from CryptBufferConcern::Comparable

#==

Methods included from CryptBufferConcern::Convertable

#bits, #chars, #hex, #str, #to_s

Methods included from CryptBufferConcern::Arithmetic

#add, #mod_sub, #modulus, #sub

Constructor Details

#initialize(byte_array) ⇒ CryptBuffer

Returns a new instance of CryptBuffer.



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# File 'lib/crypto-toolbox/crypt_buffer.rb', line 36

def initialize(byte_array)
  @bytes = byte_array
end

Instance Attribute Details

#bytes ⇒ Object Also known as: b

Returns the value of attribute bytes.



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# File 'lib/crypto-toolbox/crypt_buffer.rb', line 32

def bytes
  @bytes
end

Class Method Details

.from_hex(input) ⇒ Object

Make sure input strings are always interpreted as hex strings This is especially useful for unknown or uncertain inputs like strings with or without leading 0x



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# File 'lib/crypto-toolbox/crypt_buffer.rb', line 43

def self.from_hex(input)
  CryptBufferInputConverter.new.from_hex(input)
end

Instance Method Details

#chunks_of(n) ⇒ Object 



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# File 'lib/crypto-toolbox/crypt_buffer.rb', line 62

def chunks_of(n)
  self.bytes.each_slice(n).map{|chunk| CryptBuffer(chunk) }
end

#nth_bits(n) ⇒ Object

Returns an array of the nth least sigificant by bit of each byte

Raises:



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# File 'lib/crypto-toolbox/crypt_buffer.rb', line 55

def nth_bits(n)
  raise OutOfRangeError if n < 0
  raise OutOfRangeError if n > 7
  
  bits.map{|b| b.reverse[n].to_i }
end

#nth_bytes(n, offset: 0) ⇒ Object 



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# File 'lib/crypto-toolbox/crypt_buffer.rb', line 47

def nth_bytes(n,offset: 0)
  return CryptBuffer([]) if n.nil? || n < 1

  CryptBuffer((0+offset).step(length,n).map{|i| bytes[i] }.compact)
end