A simple example of credential use is the SQL Server proxy account. When credentials are added to a SQL Server, passwords have to be saved to the database using reversible encryption to allow for proper use of the credentials. It is possible to decrypt saved credentials password as explained in this blog. MSSQL stores credential passwords to the master. I was able to figure out the location of the encrypted passwords after looking at the definition of the master. Contains a row for each general value property of an entity.
I could not find documentation about valclass and valnum but those values seemed to work on my test systems. The master. Passwords stored in sys. After the parsing credential passwords can be decrypted using the SMK. The user executing the script must also have sysadmin access to all the database instances for the DAC connection and local admin privileges on the Windows server to access the entropy bytes in registry.
Create a free Team What is Teams? Learn more. Asked 9 years, 10 months ago. Active 4 years, 2 months ago. Viewed 35k times. Is there anyway to get the decrypted password from the sql server?
Improve this question. So, do these applications have the password stored? WHY not get the password that is stored in those applications? Should be usually plain text for some of course depends on the app — Jakub.
Add a comment. Active Oldest Votes. It'll be much easier to get the password from the. Viewed k times.
Cade Roux Add a comment. Active Oldest Votes. What once was good, but now is weak The hashing algorithm introduced with SQL Server 7, in , was good for It is good that the password hash salted.
It is good to append the salt to the password, rather than prepend it. Ian Boyd Ian Boyd k gold badges silver badges bronze badges. See hashcat. Svet Svet 3, 8 8 gold badges 26 26 silver badges 23 23 bronze badges. Instead you have to use pwdcompare 'plaintext psw', 'hashed psw' to correctly compare them. Just a note, the hashes are irreversible because it's possible that two different strings could equal the same hash. In that way it's impossible to know what it originally was.
It's just incredibly unlikely to come across two strings that equal the same hash, but it makes the hash more secure by not being able to decrypt it. More accurately, you cannot decrypt a hash because a hash contains no encrypted data. Hashing is a lossy operation, encryption is not. You can't. Hashing is deterministic process which produces a shorter value from a longer value.
There are many long values that can produces the same short value, although many hashing algorithms are designed to minimise the probability for collisions. But they are also designed to make it impossible to retrieve the original value from the hash. For every expert, there is an equal and opposite expert. Sign in.
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