salt

问题 I am new to storing passwords on databases and from what I read I have created a simple php script below <?php $salt = openssl_random_pseudo_bytes (16); $password = "test"; $hash = hash ("sha512" , $salt . $password); echo $hash; ?> Am I doing this correctly? Should the salt be stored in databases as byte datatype? Should the final hash be stored at String datatype in database? 回答1: The SHA* algorithms are not appropriate to hash passwords, because they are ways too fast, and therefore can be

问题 I am working with a legacy application that stored passwords in plaintext. I have ported the application to spring 3 mvc + security. I have also successfully gotten spring security handling the authentication and authorization using sha256 + a salt based on the username. This all works great, however as part of the deployment, I will need to migrate the existing database to use the new password schema. I am not sure how spring security does it's password hashing with a salt, so i am unable to

问题 I am working with a legacy application that stored passwords in plaintext. I have ported the application to spring 3 mvc + security. I have also successfully gotten spring security handling the authentication and authorization using sha256 + a salt based on the username. This all works great, however as part of the deployment, I will need to migrate the existing database to use the new password schema. I am not sure how spring security does it's password hashing with a salt, so i am unable to

问题 I would like to add salt like: PasswordEncoder encoder = new ShaPasswordEncoder(); userDetails.setPassword(encoder.encodePassword(userDetails.getPassword(),saltSource.getSalt(userDetails)); as far userDetails is instance of my custom UserDetail class,i obliged to cast it to this spring class:UserDetails ,but as it's logically expected i got in Runtime: java.lang.ClassCastException: model.UserDetails cannot be cast to org.springframework.security.core.userdetails.UserDetails config: <beans

问题 I was doing a little research or googling for different methods of handling password hashing and salting and came across this interesting link: http://phix.me/salt/ Now, essentially what this proposes is the creation of two user functions, one for hashing and one for checking the hash. The salt is pseudo random but is in actual fact based upon the password (strikes me as bad?). The hashing function also pseudo randomly "sprinkles" the salt amongst the hash string. The hash checking function

问题 Alright, turns out I suck at Encryption/Decryption. I just dont get it. How can I make Java encrypt String message1 = "hello world"; with String salt = "mySalt"; using AES encryption? also how can I decrypt it once encrypted? If you have the time to provide the most basic code, it would help me a lot. Also 1 general question about AES encryption, using the same salt, will the same message always have the same encryption? Thanks in advance. 回答1: AES doesn't have a concept of a salt. It just

问题 I am trying to find a library to implement password hashing(with salt) using Scrypt algorithm. My question is similar to one already asked in stackoverflow (Hash password in Swift application) I have found following two libraries in swift and objective c respectively but the hash string generated from these is not matching with the one generated at server. Swift-Sodium (https://github.com/jedisct1/swift-sodium) NAChloride (https://github.com/gabriel/NAChloride) Can someone please help in

问题 Using bcrypt with Python 2.7, I can see that the example uses the bcrypt.hashpw to both hash a password for storage and verify that the given password matches a hashed one, like so: Hashing import bcrypt password = b"somepassword" hashed = bcrypt.hashpw(password, bcrypt.gensalt()) Ok, so far so good. The given password is now hashed using bcrypt, so it is a string of hashed bytes. Verifying Now, here's the part that confuses me: to check that a plaintext password matches a hashed password,

问题 I am debating using user-names as a means to salt passwords, instead of storing a random string along with the names. My justification is that the purpose of the salt is to prevent rainbow tables, so what makes this realistically less secure than another set of data in there? For example, hash( md5(johnny_381@example.com), p4ss\/\/0rD) vs hash( md5(some_UUID_value), p4ss\/\/0rD) Is there a real reason I couldn't just stick with the user name and simplify things? The only thing my web

问题 Laravel uses bcrypt to hash passwords. According to this article, at some point in the process, the Hash::make function creates and uses a 22-length random string as a salt to generate the password. For a single distinct password, Hash::make does return unique hashes, hinting that it does use some kind of salting somewhere in the process. But these salts are not stored in the users table, where I would expect them. How does laravel know the appropriate hash to use to verify the password?