Class: CryptoCipher::CryptoAES256

Inherits:
Object
  • Object
show all
Defined in:
lib/cipher/crypto_cipher_aes.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(public_key_file, private_key_file, private_cipher_file = './config/private_cipher.key') ⇒ CryptoAES256 



15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
 
# File 'lib/cipher/crypto_cipher_aes.rb', line 15

def initialize(public_key_file, private_key_file,  private_cipher_file = './config/private_cipher.key')
    
    @cipher = OpenSSL::Cipher.new('aes256')

    @private_cipher = private_cipher_file
       
    @public_key  = OpenSSL::PKey::RSA.new(File.read(public_key_file))
    @private_key = OpenSSL::PKey::RSA.new(File.read(private_key_file))
    
    if exist_rsa_keys
        puts 'create values'
        @cipher.encrypt

        @random_key = @cipher.random_key
        @random_iv  = @cipher.random_iv

        create_key_iv @random_key, @random_iv 
    else 
        rsa = get_key_iv
        @random_key = rsa[:random_key]
        @random_iv  = rsa[:random_iv]
    end
end

Instance Attribute Details

#cipher ⇒ Object

Returns the value of attribute cipher.



7
8
9
 
# File 'lib/cipher/crypto_cipher_aes.rb', line 7

def cipher
  @cipher
end

#private_cipher ⇒ Object

Returns the value of attribute private_cipher.



11
12
13
 
# File 'lib/cipher/crypto_cipher_aes.rb', line 11

def private_cipher
  @private_cipher
end

#private_key ⇒ Object

Returns the value of attribute private_key.



13
14
15
 
# File 'lib/cipher/crypto_cipher_aes.rb', line 13

def private_key
  @private_key
end

#public_key ⇒ Object

Returns the value of attribute public_key.



12
13
14
 
# File 'lib/cipher/crypto_cipher_aes.rb', line 12

def public_key
  @public_key
end

#random_iv ⇒ Object

Returns the value of attribute random_iv.



9
10
11
 
# File 'lib/cipher/crypto_cipher_aes.rb', line 9

def random_iv
  @random_iv
end

#random_key ⇒ Object

Returns the value of attribute random_key.



8
9
10
 
# File 'lib/cipher/crypto_cipher_aes.rb', line 8

def random_key
  @random_key
end

Instance Method Details

#decrypt(encrypted_data) ⇒ Object 



100
101
102
103
104
105
106
107
108
109
110
111
 
# File 'lib/cipher/crypto_cipher_aes.rb', line 100

def decrypt(encrypted_data)
    @cipher.decrypt

    encrypted_key = @public_key.public_encrypt(@random_key)
    encrypted_iv = @public_key.public_encrypt(@random_iv)

    @cipher.key = @private_key.private_decrypt(encrypted_key)
    @cipher.iv = @private_key.private_decrypt(encrypted_iv)

    decrypted_data = @cipher.update(Base64.decode64(encrypted_data)) + cipher.final
    return decrypted_data
end

#encrypt(plain_data) ⇒ Object 



89
90
91
92
93
94
95
96
97
 
# File 'lib/cipher/crypto_cipher_aes.rb', line 89

def encrypt(plain_data)
    @cipher.encrypt
    
    @cipher.key = @random_key
    @cipher.iv  = @random_iv

    encrypted_data = @cipher.update(plain_data) + cipher.final
    return Base64.strict_encode64(encrypted_data)
end