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Date: Fri, 21 Jul 2017 13:32:00 +0000 (UTC)
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Subject: [jira] [Commented] (DRILL-5634) Add Crypto and Hash Functions
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archived-at: Fri, 21 Jul 2017 13:32:04 -0000


    [ https://issues.apache.org/jira/browse/DRILL-5634?page=3Dcom.atlassian=
.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D1609=
6252#comment-16096252 ]=20

ASF GitHub Bot commented on DRILL-5634:
---------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/drill/pull/865


> Add Crypto and Hash Functions
> -----------------------------
>
>                 Key: DRILL-5634
>                 URL: https://issues.apache.org/jira/browse/DRILL-5634
>             Project: Apache Drill
>          Issue Type: New Feature
>          Components: Functions - Drill
>    Affects Versions: 1.10.0
>            Reporter: Charles Givre
>              Labels: doc-impacting, ready-to-commit
>             Fix For: 1.11.0
>
>
> This library contains a collection of cryptography-related functions for =
Apache Drill. It generally mirrors the crypto functions in MySQL.  The pack=
age includes:
> * **`aes_encrypt()`/ `aes_decrypt()`**: implement encryption and decrypti=
on of data using the official AES (Advanced Encryption Standard) algorithm,=
 previously known as =E2=80=9CRijndael.=E2=80=9D
>  `AES_ENCRYPT()` encrypts the string `str` using the key string `key_str`=
 and returns a binary string containing the encrypted output. `AES_DECRYPT(=
)` decrypts the encrypted string `crypt_str` using the key string `key_str`=
 and returns the original cleartext string. If either function argument is =
NULL, the function returns NULL.
> ```sql
> > SELECT aes_encrypt( 'encrypted_text', 'my_secret_key' ) AS aes FROM (VA=
LUES(1));
> +---------------------------+
> |            aes            |
> +---------------------------+
> | JkcBUNAn8ByKWCcVmNrKMA=3D=3D  |
> +---------------------------+
>  > SELECT aes_encrypt( 'encrypted_text', 'my_secret_key' ) AS encrypted,
>  aes_decrypt(aes_encrypt( 'encrypted_text', 'my_secret_key' ),'my_secret_=
key') AS decrypted=20
>  FROM (VALUES(1));
> +---------------------------+-----------------+
> |         encrypted         |    decrypted    |
> +---------------------------+-----------------+
> | JkcBUNAn8ByKWCcVmNrKMA=3D=3D  | encrypted_text  |
> +---------------------------+-----------------+
> ```
> * **`md5(<text>)`**:  Returns the md5 hash of the text. (https://en.wikip=
edia.org/wiki/MD5)
> Usage:
> ```sql
> > select md5( 'testing' ) from (VALUES(1));
> +-----------------------------------+
> |              EXPR$0               |
> +-----------------------------------+
> | ae2b1fca515949e5d54fb22b8ed95575  |
> +-----------------------------------+
> ```
> * **`sha(<text>`) / `sha1(<text>)`**: Calculates an SHA-1 160-bit checksu=
m for the string, as described in RFC 3174 (Secure Hash Algorithm). (https:=
//en.wikipedia.org/wiki/SHA-1)  The value is returned as a string of 40 hex=
adecimal digits, or NULL if the argument was NULL. Note that `sha()` and `s=
ha1()` are aliases for the same function.=20
> ```sql
> > select sha1( 'testing' ) from (VALUES(1));
> +-------------------------------------------+
> |                  EXPR$0                   |
> +-------------------------------------------+
> | dc724af18fbdd4e59189f5fe768a5f8311527050  |
> +-------------------------------------------+
> ```
> * **`sha2(<text>`) / `sha256(<text>)`**: Calculates an SHA-2 256-bit chec=
ksum for the string. (https://en.wikipedia.org/wiki/SHA-2)  The value is re=
turned as a string of hexadecimal digits, or NULL if the argument was NULL.=
 Note that `sha2()` and `sha256()` are aliases for the same function.=20
> ```sql
> > select sha2( 'testing' ) from (VALUES(1));
> +-------------------------------------------------------------------+
> |                              EXPR$0                               |
> +-------------------------------------------------------------------+
> | cf80cd8aed482d5d1527d7dc72fceff84e6326592848447d2dc0b0e87dfc9a90  |
> +-------------------------------------------------------------------+
> ```
> Additionally, there are also `sha384(<text>)` and `sha512(<text>)` functi=
ons which return SHA-2 hashes with 384 and 512 bit checksums.


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