io.vertx.ext.auth.jdbc

Interface JDBCHashStrategy

Deprecated.

This strategy has been deprecated in favour of HashingStrategy. The new implementation is backend agnostic and follows a standard format that can be reused across different storages.

@Deprecated
public interface JDBCHashStrategy

Determines how the hashing is computed in the implementation You can implement this to provide a different hashing strategy to the default.

Author:

Tim Fox

Method Summary

Modifier and Type	Method and Description
String	computeHash(String password, String salt, int version) Deprecated. Compute the hashed password given the unhashed password and the salt
static JDBCHashStrategy	createPBKDF2(Vertx vertx) Deprecated. Implements a Hashing Strategy as per https://www.owasp.org/index.php/Password_Storage_Cheat_Sheet (2018-01-17).
static JDBCHashStrategy	createSHA512(Vertx vertx) Deprecated. This is the current backwards compatible hashing implementation, new applications should prefer the PBKDF2 implementation, unless the tradeoff between security and CPU usage is an option.
String	generateSalt() Deprecated. Compute a random salt.
String	getHashedStoredPwd(JsonArray row) Deprecated. Retrieve the hashed password from the result of the authentication query
String	getSalt(JsonArray row) Deprecated. Retrieve the salt from the result of the authentication query
static boolean	isEqual(String hasha, String hashb) Deprecated. Time constant string comparision to avoid timming attacks.
void	setNonces(JsonArray nonces) Deprecated. Sets a ordered list of nonces where each position corresponds to a version.

Method Detail

createSHA512

static JDBCHashStrategy createSHA512(Vertx vertx)

Deprecated.

This is the current backwards compatible hashing implementation, new applications should prefer the PBKDF2 implementation, unless the tradeoff between security and CPU usage is an option.

Parameters:

vertx - the vert.x instance

Returns:

the implementation.

createPBKDF2

static JDBCHashStrategy createPBKDF2(Vertx vertx)

Deprecated.

Implements a Hashing Strategy as per https://www.owasp.org/index.php/Password_Storage_Cheat_Sheet (2018-01-17). New deployments should use this strategy instead of the default one (which was the previous OWASP recommendation). The work factor can be updated by using the nonces json array.

Parameters:

vertx - the vert.x instance

Returns:

the implementation.

generateSalt

String generateSalt()

Deprecated.

Compute a random salt.

Returns:

a non null salt value

computeHash

String computeHash(String password,
                   String salt,
                   int version)

Deprecated.

Compute the hashed password given the unhashed password and the salt

Parameters:

password - the unhashed password

salt - the salt

version - the nonce version to use

Returns:

the hashed password

getHashedStoredPwd

String getHashedStoredPwd(JsonArray row)

Deprecated.

Retrieve the hashed password from the result of the authentication query

Parameters:

row - the row

Returns:

the hashed password

getSalt

String getSalt(JsonArray row)

Deprecated.

Retrieve the salt from the result of the authentication query

Parameters:

row - the row

Returns:

the salt

setNonces

void setNonces(JsonArray nonces)

Deprecated.

Sets a ordered list of nonces where each position corresponds to a version. The nonces are supposed not to be stored in the underlying jdbc storage but to be provided as a application configuration. The idea is to add one extra variable to the hash function in order to make breaking the passwords using rainbow tables or precomputed hashes harder. Leaving the attacker only with the brute force approach. Nonces are dependent on the implementation. E.g.: for the SHA512 they are extra salt used during the hashing, for the PBKDF2 they map the number of iterations the algorithm should take

Parameters:

nonces - a json array.

isEqual

static boolean isEqual(String hasha,
                       String hashb)

Deprecated.

Time constant string comparision to avoid timming attacks.

Parameters:

hasha - hash a to compare

hashb - hash b to compare

Returns:

true if equal