package pbkdf2

Import Path
	golang.org/x/crypto/pbkdf2 (on go.dev)

Dependency Relation
	imports 2 packages, and imported by 2 packages


Involved Source Files

	
		Package pbkdf2 implements the key derivation function PBKDF2 as defined in RFC
		2898 / PKCS #5 v2.0.
		
		A key derivation function is useful when encrypting data based on a password
		or any other not-fully-random data. It uses a pseudorandom function to derive
		a secure encryption key based on the password.
		
		While v2.0 of the standard defines only one pseudorandom function to use,
		HMAC-SHA1, the drafted v2.1 specification allows use of all five FIPS Approved
		Hash Functions SHA-1, SHA-224, SHA-256, SHA-384 and SHA-512 for HMAC. To
		choose, you can pass the `New` functions from the different SHA packages to
		pbkdf2.Key.


Package-Level Functions (only one, which is exported)


	
		Key derives a key from the password, salt and iteration count, returning a
		[]byte of length keylen that can be used as cryptographic key. The key is
		derived based on the method described as PBKDF2 with the HMAC variant using
		the supplied hash function.
		
		For example, to use a HMAC-SHA-1 based PBKDF2 key derivation function, you
		can get a derived key for e.g. AES-256 (which needs a 32-byte key) by
		doing:
		
			dk := pbkdf2.Key([]byte("some password"), salt, 4096, 32, sha1.New)
		
		Remember to get a good random salt. At least 8 bytes is recommended by the
		RFC.
		
		Using a higher iteration count will increase the cost of an exhaustive
		search but will also make derivation proportionally slower.