php Programming Glossary: openssl_random_pseudo_bytes

http://stackoverflow.com/questions/10916284/how-to-encrypt-decrypt-data-in-php

MCRYPT_RIJNDAEL_128 MCRYPT_MODE_CFB encryption_key openssl_random_pseudo_bytes key_size strong strong will be true if the key is crypto safe.. can be generated like this password 'my password' random openssl_random_pseudo_bytes 18 salt sprintf ' 2y 02d s' 13 2^n cost factor substr strtr.. 0 22 hash crypt password salt The salt is generated with openssl_random_pseudo_bytes to form a random blob of data which is then run through base64_encode..

How does PHP's password_hash generate the salt?

http://stackoverflow.com/questions/14673005/how-does-phps-password-hash-generate-the-salt

buffer buffer_valid true if buffer_valid function_exists 'openssl_random_pseudo_bytes' buffer openssl_random_pseudo_bytes raw_length if buffer buffer_valid.. function_exists 'openssl_random_pseudo_bytes' buffer openssl_random_pseudo_bytes raw_length if buffer buffer_valid true if buffer_valid is_readable..

bcrypt and randomly generated salts

http://stackoverflow.com/questions/16736119/bcrypt-and-randomly-generated-salts

this rounds rounds Gen Salt public function genSalt openssl_random_pseudo_bytes 16 Fallback seed '' for i 0 i 16 i seed . chr mt_rand 0 255..

What is a good way to produce a random “site salt” to be used in creating password retrieval tokens?

http://stackoverflow.com/questions/3290283/what-is-a-good-way-to-produce-a-random-site-salt-to-be-used-in-creating-passwo

as dev urandom . As of PHP 5.3 PHP applications can use openssl_random_pseudo_bytes and the Openssl library will choose the best entropy source.. 1 bits 1 set all lower bits to 1 do rnd hexdec bin2hex openssl_random_pseudo_bytes bytes rnd rnd filter discard irrelevant bits while rnd range..

How do you use bcrypt for hashing passwords in PHP?

http://stackoverflow.com/questions/4795385/how-do-you-use-bcrypt-for-hashing-passwords-in-php

function getRandomBytes count bytes '' if function_exists 'openssl_random_pseudo_bytes' strtoupper substr PHP_OS 0 3 'WIN' OpenSSL slow on Win bytes.. substr PHP_OS 0 3 'WIN' OpenSSL slow on Win bytes openssl_random_pseudo_bytes count if bytes '' is_readable ' dev urandom' hRand @fopen '..

How can we create a fairly secure password hash in PHP?

http://stackoverflow.com/questions/6340105/how-can-we-create-a-fairly-secure-password-hash-in-php

count static randomState null bytes '' if function_exists 'openssl_random_pseudo_bytes' strtoupper substr PHP_OS 0 3 'WIN' OpenSSL slow on Win bytes.. substr PHP_OS 0 3 'WIN' OpenSSL slow on Win bytes openssl_random_pseudo_bytes count if bytes '' is_readable ' dev urandom' hRand @fopen '.. function getRandomBytes count bytes '' if function_exists 'openssl_random_pseudo_bytes' strtoupper substr PHP_OS 0 3 'WIN' OpenSSL slow on Win bytes..

What's the disadvantage of mt_rand?

http://stackoverflow.com/questions/7808021/whats-the-disadvantage-of-mt-rand

keys either. If you need cryptographic randomness use openssl_random_pseudo_bytes . You can use the crypto_strong parameter to verify that the..