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My Project
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Public Member Functions | |
| __construct () | |
| get_key ($key= '') | |
| set_key ($key= '') | |
| encode ($string, $key= '') | |
| decode ($string, $key= '') | |
| encode_from_legacy ($string, $legacy_mode=MCRYPT_MODE_ECB, $key= '') | |
| _xor_encode ($string, $key) | |
| _xor_decode ($string, $key) | |
| _xor_merge ($string, $key) | |
| mcrypt_encode ($data, $key) | |
| mcrypt_decode ($data, $key) | |
| _add_cipher_noise ($data, $key) | |
| _remove_cipher_noise ($data, $key) | |
| set_cipher ($cipher) | |
| set_mode ($mode) | |
| _get_cipher () | |
| _get_mode () | |
| set_hash ($type= 'sha1') | |
| hash ($str) | |
| sha1 ($str) | |
Data Fields | |
| $CI | |
| $encryption_key = '' | |
| $_hash_type = 'sha1' | |
| $_mcrypt_exists = FALSE | |
| $_mcrypt_cipher | |
| $_mcrypt_mode | |
| __construct | ( | ) |
Constructor
Simply determines whether the mcrypt library exists.
| _add_cipher_noise | ( | $data, | |
| $key | |||
| ) |
Adds permuted noise to the IV + encrypted data to protect against Man-in-the-middle attacks on CBC mode ciphers http://www.ciphersbyritter.com/GLOSSARY.HTM#IV
Function description
private
| string | |
| string |
| _get_cipher | ( | ) |
Get Mcrypt cipher Value
private
| _get_mode | ( | ) |
Get Mcrypt Mode Value
private
| _remove_cipher_noise | ( | $data, | |
| $key | |||
| ) |
Removes permuted noise from the IV + encrypted data, reversing _add_cipher_noise()
Function description
public
| type |
| _xor_decode | ( | $string, | |
| $key | |||
| ) |
XOR Decode
Takes an encoded string and key as input and generates the plain-text original message
private
| string | |
| string |
| _xor_encode | ( | $string, | |
| $key | |||
| ) |
XOR Encode
Takes a plain-text string and key as input and generates an encoded bit-string using XOR
private
| string | |
| string |
| _xor_merge | ( | $string, | |
| $key | |||
| ) |
XOR key + string Combiner
Takes a string and key as input and computes the difference using XOR
private
| string | |
| string |
| decode | ( | $string, | |
$key = '' |
|||
| ) |
Decode
Reverses the above process
public
| string | |
| string |
| encode | ( | $string, | |
$key = '' |
|||
| ) |
Encode
Encodes the message string using bitwise XOR encoding. The key is combined with a random hash, and then it too gets converted using XOR. The whole thing is then run through mcrypt (if supported) using the randomized key. The end result is a double-encrypted message string that is randomized with each call to this function, even if the supplied message and key are the same.
public
| string | the string to encode |
| string | the key |
| encode_from_legacy | ( | $string, | |
$legacy_mode = MCRYPT_MODE_ECB, |
|||
$key = '' |
|||
| ) |
Encode from Legacy
Takes an encoded string from the original Encryption class algorithms and returns a newly encoded string using the improved method added in 2.0.0 This allows for backwards compatibility and a method to transition to the new encryption algorithms.
For more details, see http://codeigniter.com/user_guide/installation/upgrade_200.html#encryption
public
| string | |
| int | (mcrypt mode constant) |
| string |
| get_key | ( | $key = '') |
Fetch the encryption key
Returns it as MD5 in order to have an exact-length 128 bit key. Mcrypt is sensitive to keys that are not the correct length
public
| string |
| hash | ( | $str) |
Hash encode a string
public
| string |
| mcrypt_decode | ( | $data, | |
| $key | |||
| ) |
Decrypt using Mcrypt
public
| string | |
| string |
| mcrypt_encode | ( | $data, | |
| $key | |||
| ) |
Encrypt using Mcrypt
public
| string | |
| string |
| set_cipher | ( | $cipher) |
Set the Mcrypt Cipher
public
| constant |
| set_hash | ( | $type = 'sha1') |
Set the Hash type
public
| string |
| set_key | ( | $key = '') |
Set the encryption key
public
| string |
| set_mode | ( | $mode) |
Set the Mcrypt Mode
public
| constant |
| sha1 | ( | $str) |
Generate an SHA1 Hash
public
| string |
1.8.4
