I have a table with three columns named: Question, Answer, Hashed. I want to update the Hashed column with the Answer column hashed using sha512.
I've tried to do the update directly from my MySql database using this syntax, but it didn't work:
UPDATE TableName
SET Hashed = SHA512(Answer)
WHERE Hashed IS NULL
I know the syntax is wrong but not sure why.
Thanks in advance for your help!
R
Give this a shot.
UPDATE TableName SET Hashed=SHA2(Answer, 512) WHERE Hashed IS NULL;
Note that this will only work with MySQL 5.5 onward. For versions before 5.5, you'll have to use application code to hash it (PHP to get all the rows, iterate through and hash $row['answer'] to SHA512, then run the UPDATE commands on each)
(Source: http://dev.mysql.com/doc/refman/5.5/en//encryption-functions.html#function_sha2)
I hope this is not too late. Even if, maybe someone else will find out this hint:
UPDATE TableName SET Hashed = ENCRYPT('Answer', CONCAT('$6$', SUBSTRING(SHA(RAND()), -16))) WHERE Hashed IS NULL;
What it does, it creates sha-512 hash, with it's schema: $6$ from string 'Answer'
If you are using debian, you may also use mkpasswd from package libstring-mkpasswd-perl to generate SHA-512 for you, and update as string.
Related
I've got a set of usernames, some of which I need to alter in the same way: For example, change:
user-name1 to Xuser-name1
user-abc to Xuser-abc
abcuser to Xabcuser
etc.
What would be the syntax? The closest I've got is:
UPDATE Table
ALTER username="x+oldusername"
WHERE username IN ('username1', 'userabc', 'lastuser');
Apologies if this is achingly obvious. I've been looking for just under an hour, I can manage basic MySQL but not to this level. Much appreciation in advance.
The correct way to concatenate strings in MySQL is with CONCAT, and you SET a column value, not ALTER it:
UPDATE Table
SET username = CONCAT('x', username)
WHERE username IN ('username1', 'userabc', 'lastuser');
I was trying my first 'Helloworld' application in Cassandra. Whenever I try to add any data to my keyspace column family I get this error:
[default#MyKeyspace] set User['ehewitt'] ['fname']='Eben';
org.apache.cassandra.serializers.MarshalException: cannot parse 'fname' as hex bytes
This is despite the fact that I have executed
[default#MyKeyspace] assume Users keys as utf8;
So the above command does not seem to have any effect at all. How do I solve this issue?
Cassandra is assuming the columns as bytes.
Check with
help assume;
assume User keys as ascii;
assume User comparator as ascii;
assume User validator as ascii;
assume User sub_comparator as ascii;
set User['ehewitt']['fname']='Eben';
Value inserted.
Elapsed time: 216 msec(s).
I had similar problem, but the cli told me that the value is what cannot be parsed.
set game_outcome['1']['userId']='123asdasd';
cannot parse '123asdasd' as hex bytes
so I tried to use utf8 function like this :
set game_outcome['1']['userId']=utf8('123asdasd');
cannot parse '123asdasd' as hex bytes
Try
set User['ehewitt'] [utf8('fname')]='Eben'
I tried to use set some assumption like this
assume validator keys as utf8;
validator not found in current keyspace.
But as you can see it did not work as well !
I hope this answer helps.
Starting the CLI
You can start the CLI using the bin/cassandra-cli script in your Cassandra installation (bin\cassandra-cli.bat on windows). If you are evaluating a local cassandra node then be sure that it has been correctly configured and successfully started before starting the CLI.
If successful you will see output similar to this:
Welcome to cassandra CLI.
Type 'help;' or '?' for help. Type 'quit;' or 'exit;' to quit.
You must then specify a system to connect to:
connect localhost/9160;
Creating a Keyspace
We first create a keyspace to run our examples in.
create keyspace Twissandra;
Selecting the keyspace to user
We must then select our example keyspace as our new context before we can run any queries.
use Twissandra;
To Create A Column
We can then create a column to play with.
create column family User with comparator = UTF8Type;
For the later examples to work you must also update the schema using the following command. This will set the return type for the first and last name to make them human readable. It will also add and index for the age field so that you filter your gets using the Users name field.
update column family User with
column_metadata =
[
{column_name: first, validation_class: UTF8Type},
{column_name: last, validation_class: UTF8Type},
{column_name: age, validation_class: UTF8Type, index_type: KEYS}
];
To Add Data
To add data we want to into our new column we must first specify our default key type otherwise we would have to specify it for each key using the format [utf8('keyname')] this is probably advisable if you have mixed key types but makes simple cases harder to read.
So we run the command below, which will last the length of you cli session. On quitting and restarting we must run it again.
assume User keys as utf8;
and then we add our data.
set User['jsmith']['first'] = 'John';
set User['jsmith']['last'] = 'Smith';
set User['jsmith']['age'] = '38';
If you get the error like this cannot parse 'John' as hex bytes, then it likely you either haven't set your default key type or you haven't updated your schema as in the create column example.
To Update Data
If we need to update a value we simply set it again.
set User['jsmith']['first'] = 'Jack';
To Get Data
Now let's read back the jsmith row to see what it contains:
get User['jsmith'];
The get command uses API#get_slice
To Query Data
get User where age = '12';
I've searched and can't seem to find quite what I'm looking for.
I'm running a PL/SQL script in Oracle, and attempting to insert records into a table in MySQL via database link using MySQL ODBC 5.2 Unicode Driver.
The link works fine, I can do complex queries in Oracle using it, and do various inserts and updates on records there.
Where it fails is in trying to insert a record into a MySQL table that has a column of type bit(1).
It is basically a cursor for loop, with the insert statement looking something like:
INSERT INTO "app_user"#mobileapi (USERNAME, VERSION, ACCOUNT_EXPIRED, ACCOUNT_LOCKED, PASSWD, PASSWORD_EXPIRED)
VALUES (CU_rec.USERNAME, CU_rec.VERSION, CU_rec.ACCOUNT_EXPIRED, CU_rec.ACCOUNT_LOCKED, CU_rec.PASSWD, CU_rec.PASSWORD_EXPIRED)
Some of the target columns, like ACCOUNT_EXPIRED, ACCOUNT_LOCKED, etc. are the bit(1) columns in MySQL. Given that I can convert the data types in the cursor CU_rec to pretty much anything I want in Oracle, how can I get them inserted into the target? I've tried everything I can think of, and I just keep getting:
Error report:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[MySQL][ODBC 5.2(w) Driver][mysqld-5.6.10]Data too long for column 'ACCOUNT_EXPIRED' at row 1 {HY000,NativeErr = 1406}
ORA-02063: preceding 2 lines from MOBILEAPI
ORA-06512: at line 44
28500. 00000 - "connection from ORACLE to a non-Oracle system returned this message:"
*Cause: The cause is explained in the forwarded message.
*Action: See the non-Oracle system's documentation of the forwarded
message.
Any help at all would be greatly appreciated.
Your problem is Oracle's default datatype conversion over ODBC; according to their own documentation they convert SQL_BINARY to a raw. Although not directly related, Oracle's comparison of MySQL and Oracle within SQL Developer also alludes to the fact that the automatic conversion from a MySQL bit is to an Oracle raw.
Extremely confusingly, MySQL's documentation indicates that a bit is converted to a SQL_BIT or a SQL_CHAR, which implies that it may work in the other direction1.
According to Microsoft's ODBC docs you should, theoretically, be able to use the CONVERT() function to transform this into a character, which should, theoretically, be translatable by MySQL.
insert into some_table#some_db (bit_col)
values( {fn convert(some_col, SQL_CHAR)} );
Failing that there's another couple of options, but it does depend on what you're attempting to insert into the MySQL database from Oracle and what the datatype is in Oracle. For instance you could use the Oracle CAST() function to convert between datatypes. For instance, the following would convert an integer to a binary double.
select cast(1 as binary_double) from dual
Unfortunately, you can't cast an integer to a raw, only a character or a rowid, so in order to convert to a raw you'd have to do the following:
select cast(to_char(1) as raw(1)) from dual
I've no idea whether MySQL will accept this but with some testing you should be able to work it out.
1. For clarity, I've never tried it in either direction.
Hah! I found a solution. Dropping it here in case it helps someone else. It's not pretty, but it works.
I used the old EXECUTE IMMEDIATE trick.
Basically, I created a variable sql_stmt varchar2(4000) and wrote code like:
sql_stmt := 'insert into "app_user"#mobileapi (USERNAME, VERSION, ACCOUNT_EXPIRED, ACCOUNT_LOCKED, CIPHER_PASSPHRASE, ENABLED, PASSWD, PASSWORD_EXPIRED)
values ('''||CU_rec.USERNAME||'','||CU_rec.VERSION||', '||CU_rec.ACCOUNT_EXPIRED||', '||CU_rec.ACCOUNT_LOCKED||', '''||CU_rec.CIPHER_PASSPHRASE||''', '||
CU_rec.ENABLED||', '''||CU_rec.PASSWD||''', '||CU_rec.PASSWORD_EXPIRED||')';
EXECUTE IMMEDIATE sql_stmt;
Something like that anyway (the quotes might not line up, as I hacked this a bit from the actual code). Looking at the contents of sql_stmt, I get:
insert into "app_user"#mobileapi (USERNAME, VERSION, ACCOUNT_EXPIRED, ACCOUNT_LOCKED, CIPHER_PASSPHRASE, ENABLED, PASSWD,PASSWORD_EXPIRED)
values ('user#email.com', 0, 0, 0, 'asdfastrwaebawavgansdhnsgjsjsh', 1, 'awercbcakwjerhcawuerawieubkahbewvkruh', 0)
The EXECUTE IMMEDIATE completes, and checking the target table, the values are there.
Possibly a crappy solution, but better than nothing.
using ruby's mysql gem i'm inserting a new row into a table wich has encoding utf8_spanish_ci.
here's the code i'm executing
require 'mysql'
con = Mysql.new(#connecionparameters)
rs = con.query("INSERT INTO `qubi_horoscopo`.`signos` (`name`) VALUES ('acción')")
and when i query the table i get the following result :
id name
1 acción
i've checked that i'm using the same collation in the database, table and column.
so i don't know what's going wrong.
any idea? thanks!
I've solved this executing
con.query("SET NAMES UTF8")
right before my insert query.
i hope this helps anyone having the same problem. i don't know if it's the best solution.
Does mysql provide a mechanism for storing and retrieving encrypted data? I don't mean passwords, I mean real strings.
I'd like to encrypt a string, store in mysql and then retrieve the decrypted string at a later date.
So, I know there is the AES_Encrypt and decrypt functions. But they ask for a key. (which is fine) but I wondering if you call those functions and use your user password as the key. Or something else that is super-simple.
Also, is there a simple wrapper for the AES_Encrypt & decrypt functions in Rails? Or do you need to build the query manually?
You can just concat the encrypt functions:
select aes_encrypt('MyData',Password('MyPassword'))
and back again..
select Aes_decrypt( aes_encrypt('MyData',Password('MyPassword'))
, Password('MyPassword'))
If I understand you, then all you need is a method to generate an AES key from your (or other) user password?
Shouldn't you be asking 'Is there an easy method to generate an AES-key from 5-20char string'?
As you point out, the other tools are already in place in mysql: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html
Also you might find some ideas in this post here on SO.
$pass = $_POST['pass'];
$sql = "INSERT INTO testperson (name,password,contact) VALUES('$name',md5('$pass'),$cont)";
Just write md5 before the input you want to encrypt, like password.