pyspark.sql.functions.aes_decrypt#

pyspark.sql.functions.aes_decrypt(input, key, mode=None, padding=None, aad=None)[source]#

Returns a decrypted value of input using AES in mode with padding. Key lengths of 16, 24 and 32 bits are supported. Supported combinations of (mode, padding) are (‘ECB’, ‘PKCS’), (‘GCM’, ‘NONE’) and (‘CBC’, ‘PKCS’). Optional additional authenticated data (AAD) is only supported for GCM. If provided for encryption, the identical AAD value must be provided for decryption. The default mode is GCM.

New in version 3.5.0.

Parameters
inputColumn or str

The binary value to decrypt.

keyColumn or str

The passphrase to use to decrypt the data.

modeColumn or str, optional

Specifies which block cipher mode should be used to decrypt messages. Valid modes: ECB, GCM, CBC.

paddingColumn or str, optional

Specifies how to pad messages whose length is not a multiple of the block size. Valid values: PKCS, NONE, DEFAULT. The DEFAULT padding means PKCS for ECB, NONE for GCM and PKCS for CBC.

aadColumn or str, optional

Optional additional authenticated data. Only supported for GCM mode. This can be any free-form input and must be provided for both encryption and decryption.

Returns
Column

A new column that contains an decrypted value.

Examples

Example 1: Decrypt data with key, mode, padding and aad.

>>> import pyspark.sql.functions as sf
>>> df = spark.createDataFrame([(
...     "AAAAAAAAAAAAAAAAQiYi+sTLm7KD9UcZ2nlRdYDe/PX4",
...     "abcdefghijklmnop12345678ABCDEFGH", "GCM", "DEFAULT",
...     "This is an AAD mixed into the input",)],
...     ["input", "key", "mode", "padding", "aad"]
... )
>>> df.select(sf.aes_decrypt(
...     sf.unbase64(df.input), df.key, df.mode, df.padding, df.aad
... ).cast("STRING")).show(truncate=False) 
+---------------------------------------------------------------------+
|CAST(aes_decrypt(unbase64(input), key, mode, padding, aad) AS STRING)|
+---------------------------------------------------------------------+
|Spark                                                                |
+---------------------------------------------------------------------+

Example 2: Decrypt data with key, mode and padding.

>>> import pyspark.sql.functions as sf
>>> df = spark.createDataFrame([(
...     "AAAAAAAAAAAAAAAAAAAAAPSd4mWyMZ5mhvjiAPQJnfg=",
...     "abcdefghijklmnop12345678ABCDEFGH", "CBC", "DEFAULT",)],
...     ["input", "key", "mode", "padding"]
... )
>>> df.select(sf.aes_decrypt(
...     sf.unbase64(df.input), df.key, df.mode, df.padding
... ).cast("STRING")).show(truncate=False) 
+------------------------------------------------------------------+
|CAST(aes_decrypt(unbase64(input), key, mode, padding, ) AS STRING)|
+------------------------------------------------------------------+
|Spark                                                             |
+------------------------------------------------------------------+

Example 3: Decrypt data with key and mode.

>>> import pyspark.sql.functions as sf
>>> df = spark.createDataFrame([(
...     "AAAAAAAAAAAAAAAAAAAAAPSd4mWyMZ5mhvjiAPQJnfg=",
...     "abcdefghijklmnop12345678ABCDEFGH", "CBC", "DEFAULT",)],
...     ["input", "key", "mode", "padding"]
... )
>>> df.select(sf.aes_decrypt(
...     sf.unbase64(df.input), df.key, df.mode
... ).cast("STRING")).show(truncate=False) 
+------------------------------------------------------------------+
|CAST(aes_decrypt(unbase64(input), key, mode, DEFAULT, ) AS STRING)|
+------------------------------------------------------------------+
|Spark                                                             |
+------------------------------------------------------------------+

Example 4: Decrypt data with key.

>>> import pyspark.sql.functions as sf
>>> df = spark.createDataFrame([(
...     "83F16B2AA704794132802D248E6BFD4E380078182D1544813898AC97E709B28A94",
...     "0000111122223333",)],
...     ["input", "key"]
... )
>>> df.select(sf.aes_decrypt(
...     sf.unhex(df.input), df.key
... ).cast("STRING")).show(truncate=False) 
+--------------------------------------------------------------+
|CAST(aes_decrypt(unhex(input), key, GCM, DEFAULT, ) AS STRING)|
+--------------------------------------------------------------+
|Spark                                                         |
+--------------------------------------------------------------+