By default, postgresql encrypts user passwords using the MD5 hashing function. They can be seen as "md5....." in the rolpassword column of the pg_authid table. Is there a mechanism that allows us to change this default behavior such that postgresql can encrypt the passwords stored in the pg_authid table using a stronger hashing function such as SHA1? Postgresql conf file has a property "ssl_ciphers" in which you can specify a list of ciphers. But they are only used on ssl connections and have no impact on the ciphers used in user password encryption. Is this correct? |
