Class: CryptBuffer

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
CryptBufferConcern::Arithmetic, CryptBufferConcern::Array, 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, #pretty_hexstring

Methods included from CryptBufferConcern::Padding

#pad, #padding, #padding?, #strip_padding, #strip_padding!, #validate_padding!

Methods included from CryptBufferConcern::Comparable

#==

Methods included from CryptBufferConcern::Convertable

#base64, #bits, #chars, #hex, #str, #to_crypt_buffer, #to_s

Methods included from CryptBufferConcern::Array

#+, #[], #first, #last, #shift, #unshift

Methods included from CryptBufferConcern::Arithmetic

#add, #hdist, #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 43

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 18

def bytes
  @bytes
end

Class Method Details

.from_base64(input) ⇒ Object 


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# File 'lib/crypto-toolbox/crypt_buffer.rb', line 54

def self.from_base64(input)
  CryptBufferInputConverter.new.from_base64(input)
end

.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 50

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 73

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 66

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 58

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