Should You Use MySQL\'s PASSWORD() Function for Password Hashing?

MySQL Password Function Considerations

When hashing passwords for an application, it's crucial to determine the best approach. MySQL's password function is particularly relevant in this regard, but its usage has raised debate.

Pros and Cons of MySQL's Password Function

Using MySQL's password function offers some advantages. It's a built-in function that handles hashing and salting securely. However, it also has potential drawbacks:

• Restricted Usage: MySQL's documentation explicitly advises against using the PASSWORD() function in custom applications.
• Weak Hashing Algorithms: The function employs either MD5 or SHA-1, which are now regarded as insufficiently robust for password protection.
• Lack of Salt Management: The PASSWORD() function manages salt but doesn't provide an explicit mechanism for retrieving or verifying it.

Recommended Alternatives

Due to these concerns, it's strongly recommended to avoid MySQL's password function for application passwords. Instead, handle both hashing and salt generation within the application itself. This allows for more control and flexibility over the security measures.

Best Practices

For optimal password security, consider the following best practices:

• Use SHA-256 or a Stronger Algorithm: Implement hashing using SHA-256 or a stronger algorithm like bcrypt or scrypt.
• Generate Random Salts: Create unique, random salts for each password to prevent rainbow table attacks.
• Store Hash and Salt Separately: Split the hash and salt into different columns in the database for added protection.

Updates on MySQL Support

MySQL's roadmap has evolved over time. While a SHA2() function was initially planned, its status has changed.

• In MySQL 5.5.8 (2010), the SHA2() function was introduced.
• In MySQL 8.0 (2018), the PASSWORD() function was removed.

Therefore, it's crucial to update your application to the latest MySQL version and adhere to the recommended best practices for password handling.

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