NSData *imageData = [NSData dataWithContentsOfFile:file];
CC_MD5(imageData, [imageData length], result);

let encodedText = text.cStringUsingEncoding(NSUTF8StringEncoding)
let textLength = CC_LONG(text.lengthOfBytesUsingEncoding(NSUTF8StringEncoding))
let digestLength = Int(CC_MD5_DIGEST_LENGTH)
let result = UnsafeMutablePointer<CUnsignedChar>.alloc(digestLength)

CC_MD5(encodedText, textLength, result)

...
const salt = "";
crypto.pbkdf2(
    password,
    salt,
    iterations,
    keyLength,
    "sha256",
    function (err, derivedKey) { ... }
);

...
CCKeyDerivationPBKDF(kCCPBKDF2,
                     password,
                     passwordLen,
                     "",
                     0,
                     kCCPRFHmacAlgSHA256,
                     100000,
                     derivedKey,
                     derivedKeyLen);
...

...
$hash = hash_pbkdf2('sha256', $password, '', 100000);
...

from hashlib import pbkdf2_hmac
...
dk = pbkdf2_hmac('sha256', password, '', 100000)
...

...
dk = OpenSSL::PKCS5.pbkdf2_hmac(password, "", 100000, 256, digest)
...

...
let ITERATION = UInt32(100000)
...
CCKeyDerivationPBKDF(CCPBKDFAlgorithm(kCCPBKDF2),
password,
passwordLength,
"",
0,
CCPseudoRandomAlgorithm(kCCPRFHmacAlgSHA256),
ITERATION,
derivedKey,
derivedKeyLength)

import hashlib, binascii

def register(request):
  password = request.GET['password']
  username = request.GET['username']

  hash = hashlib.md5("%s:%s" % ("", password,)).hexdigest()
  store(username, hash)
...

require 'openssl'
...
password = get_password()
hash = OpenSSL::Digest::SHA256.digest(password)
...

    ...
    PKCS5_PBKDF2_HMAC(pass, strlen(pass), "2!@$(5#@532@%#$253l5#@$", 2, ITERATION, EVP_sha512(), outputBytes, digest);
    ...

...
const salt = "some constant value";
crypto.pbkdf2(
    password,
    salt,
    iterations,
    keyLength,
    "sha256",
    function (err, derivedKey) { ... }
);

...
CCKeyDerivationPBKDF(kCCPBKDF2,
                     password,
                     passwordLen,
                     "2!@$(5#@532@%#$253l5#@$",
                     2,
                     kCCPRFHmacAlgSHA256,
                     100000,
                     derivedKey,
                     derivedKeyLen);
...

...
$hash = hash_pbkdf2('sha256', $password, '2!@$(5#@532@%#$253l5#@$', 100000)
...

...
from hashlib import pbkdf2_hmac
dk = pbkdf2_hmac('sha256', password, '2!@$(5#@532@%#$253l5#@$', 100000)
...

...
dk = OpenSSL::PKCS5.pbkdf2_hmac(password, '2!@$(5#@532@%#$253l5#@$', 100000, 256, digest)
...

...
let ITERATION = UInt32(100000)
let salt = "2!@$(5#@532@%#$253l5#@$"
...
CCKeyDerivationPBKDF(CCPBKDFAlgorithm(kCCPBKDF2),
password,
passwordLength,
salt,
salt.lengthOfBytesUsingEncoding(NSUTF8StringEncoding),
CCPseudoRandomAlgorithm(kCCPRFHmacAlgSHA256),
ITERATION,
derivedKey,
derivedKeyLength)
...

    ...
    crypt(password, "2!@$(5#@532@%#$253l5#@$");
    ...

    ...
    salt := "2!@$(5#@532@%#$253l5#@$"
    password := get_password()
    sha256.Sum256([]byte(salt + password)
    ...

    ...
    crypt($password, '2!@$(5#@532@%#$253l5#@$');
    ...

    ...
    from django.contrib.auth.hashers import make_password
    make_password(password, salt="2!@$(5#@532@%#$253l5#@$")
    ...

require 'openssl'
...
password = get_password()
salt = '2!@$(5#@532@%#$253l5#@$'
hash = OpenSSL::Digest::SHA256.digest(salt + password)
...

  ...
  Rfc2898DeriveBytes rdb8 = new Rfc2898DeriveBytes(password, salt,50);
  ...
  

  ...
  #define ITERATION 50
  ...
  PKCS5_PBKDF2_HMAC(pass, sizeof(pass), salt, sizeof(salt), ITERATION, EVP_sha512(), outputBytes, digest);
  ...

...
const iterations = 50;
crypto.pbkdf2(
    password,
    salt,
    iterations,
    keyLength,
    "sha256",
    function (err, derivedKey) { ... }
);

...
#define ITERATION 50
...
CCKeyDerivationPBKDF(kCCPBKDF2,
                     password,
                     passwordLen,
                     salt,
                     saltLen
                     kCCPRFHmacAlgSHA256,
                     ITERATION,
                     derivedKey,
                     derivedKeyLen);
...

...
$hash = hash_pbkdf2('sha256', $password, $salt, 50);
...

...
from hashlib import pbkdf2_hmac
dk = pbkdf2_hmac('sha256', password, salt, 50)
...

bcrypt_hash = bcrypt(b64pwd, 11)

require 'openssl'
...
key = OpenSSL::PKCS5::pbkdf2_hmac(pass, salt, 50, 256, 'SHA256')