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uphp:functions:aes_decrypt [2019/08/16 06:36] admin |
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====See Also==== | ====See Also==== | ||
- | [[aes_encrypt()]] - Encrypt data using the AES algorithm</ | + | [[aes_encrypt()]] - Encrypt data using the AES algorithm |
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- | < | + | |
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- | Decrypt AES-encrypted data in < | + | |
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- | ====Description==== | + | |
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- | <well size=" | + | |
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- | </ | + | |
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- | Decrypts the string $data with length $length bytes. | + | |
- | ====Parameter==== | + | |
- | + | ||
- | < | + | |
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- | < | + | |
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- | < | + | |
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- | < | + | |
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- | ====Return Values==== | + | |
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- | < | + | |
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- | ====Example==== | + | |
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- | <code php> | + | |
- | < | + | |
- | + | ||
- | // create your custom key and IV value | + | |
- | + | ||
- | $key=" | + | |
- | $iv=" | + | |
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- | $data=" | + | |
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- | // round up the string length to the nearest multiple of 16 | + | |
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- | $len=intval((strlen($data)+1)/ | + | |
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- | // encrypt the data | + | |
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- | $encrypted_data = aes_encrypt($data, | + | |
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- | // store encrypted data into a base64-encoded string for easy tranport | + | |
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- | $base64_encrypted = base64_encode($encrypted_data); | + | |
- | + | ||
- | print(" | + | |
- | + | ||
- | // this will yield: | + | |
- | // fcPkxhW0UM4VIYB1CsbK/ | + | |
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- | // base64 decode the string again | + | |
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- | $base64_decrypted = base64_decode($base64_encrypted); | + | |
- | + | ||
- | // we will use the calculated length from the encryption as the strlen() function | + | |
- | // may not yield a valid result if the encrypted string has a zero in it. | + | |
- | + | ||
- | // decryption | + | |
- | + | ||
- | $plain_data = aes_decrypt(& | + | |
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- | print(" | + | |
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- | ?> | + | |
- | </ | + | |
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- | The above example will output something similar to: | + | |
- | < | + | |
- | Your encrypted data is: fcPkxhW0UM4VIYB1CsbK/ | + | |
- | Your decrypted data is: This is my super secret encrypted string | + | |
- | </ | + | |
- | + | ||
- | ====See Also==== | + | |
- | + | ||
- | [[aes_encrypt()]] - Encrypt data using the AES algorithm</ | + |