ColdFusion 9.0 Resources |
DecryptDescriptionDecrypts a string that is encrypted using a standard encryption technique, including strings encrypted by the Encrypt function. HistoryColdFusion 8: Added support for encryption using the RSA BSafe Crypto-J library on Enterprise Edition. ColdFusion MX 7.01: Added the IVorSalt and iterations parameters. ColdFusion MX 7: Added the algorithm and encoding parameters. Parameters
UsageThis function uses a symmetric key-based algorithm, in which the same key is used to encrypt and decrypt a string. The parameter values must match the values used to encode string. The security of the encrypted string depends on maintaining the secrecy of the key. ColdFusion uses the Java Cryptography Extension (JCE) and installs a Sun Java runtime that includes the Sun JCE default security provider. This provider includes the algorithms listed in the Parameters section. The JCE framework includes facilities for using other provider implementations; however, Adobe cannot provide technical support for third-party security providers. Example<h3>Decrypt Example</h3> <!--- Do the following if the form has been submitted. ---> <cfif IsDefined("Form.myString")> <cfscript> /* GenerateSecretKey does not generate key for the CFMX_COMPAT algorithm, so use the key from the form. */ if (Form.myAlgorithm EQ "CFMX_COMPAT") theKey=Form.MyKey; // For all other encryption techniques, generate a secret key. else theKey=generateSecretKey(Form.myAlgorithm); //Encrypt the string encrypted=encrypt(Form.myString, theKey, Form.myAlgorithm, Form.myEncoding); //Decrypt it decrypted=decrypt(encrypted, theKey, Form.myAlgorithm, Form.myEncoding); </cfscript> <!--- Display the values used for encryption and decryption, and the results. ---> <cfoutput> <b>The algorithm:</b> #Form.myAlgorithm#<br> <b>The key:</B> #theKey#<br> <br> <b>The string:</b> #Form.myString# <br> <br> <b>Encrypted:</b> #encrypted#<br> <br> <b>Decrypted:</b> #decrypted#<br> </cfoutput> </cfif> <!--- The input form.---> <form action="#CGI.SCRIPT_NAME#" method="post"> <b>Select the encoding</b><br> <select size="1" name="myEncoding"> <option selected>UU</option> <option>Base64</option> <option>Hex</option> </select><br> <br> <b>Select the algorithm</b><br> <select size="1" name="myAlgorithm"> <option selected>CFMX_COMPAT</option> <option>AES</option> <option>DES</option> <option>DESEDE</option> </select><br> <br> <b>Input your key</b> (used for CFMX_COMPAT encryption only)<br> <input type = "Text" name = "myKey" value = "MyKey"><br> <br> <b>Enter string to encrypt</b><br> <textArea name = "myString" cols = "40" rows = "5" WRAP = "VIRTUAL"> This string is encrypted (you can replace it with more typing). </textArea><br> <input type = "Submit" value = "Encrypt my String"> </form> |