29,7 → 29,7 |
ViaThinkSoft Modular Crypt Format 1.0 performs a simple hash or HMAC operation. |
No key derivation function or iterations are performed. |
Format: |
$1.3.6.1.4.1.37476.3.0.1.1$a=<algo>,m=<mode>$<salt>$<hash> |
$1.3.6.1.4.1.37476.3.0.1.1$a=<algo>,m=<mode>[,i=<iterations>]$<salt>$<hash> |
where <algo> is any valid hash algorithm (name scheme of PHP hash_algos() preferred), e.g. |
sha3-512 |
sha3-384 |
53,6 → 53,7 |
sps = salt + password + salt |
hmac = HMAC (salt is the key) |
pbkdf2 = PBKDF2-HMAC (Additional param i= contains the number of iterations) |
<iterations> can be omitted if 0. It is required for mode=pbkdf2. For sp/ps/sps/hmac, it is optional. |
Like most Crypt-hashes, <salt> and <hash> are Radix64 coded |
with alphabet './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' and no padding. |
Link to the online specification: |
92,7 → 93,7 |
define('PASSWORD_SHA512_DEFAULT_ROUNDS', 5000); |
define('PASSWORD_VTS_MCF1_DEFAULT_ALGO', 'sha3-512'); // any value in hash_algos(), NOT vts_hash_algos() |
define('PASSWORD_VTS_MCF1_DEFAULT_MODE', PASSWORD_VTS_MCF1_MODE_PS); |
define('PASSWORD_VTS_MCF1_DEFAULT_ITERATIONS', 0); // only for mode=pbkdf2. 0=Default, depending on algo |
define('PASSWORD_VTS_MCF1_DEFAULT_ITERATIONS', 0); // For PBKDF2, iterations=0 means: Default, depending on the algo |
|
// --- Part 1: Modular Crypt Format encode/decode |
|
163,16 → 164,26 |
function vts_crypt_hash($algo, $str_password, $str_salt, $ver='1', $mode=PASSWORD_VTS_MCF1_DEFAULT_MODE, $iterations=PASSWORD_VTS_MCF1_DEFAULT_ITERATIONS) { |
if ($ver == '1') { |
if ($mode == PASSWORD_VTS_MCF1_MODE_SP) { |
$payload = $str_salt.$str_password; |
$bin_hash = hash_ex($algo, $payload, true); |
$bin_hash = hash_ex($algo, $str_salt.$str_password, true); |
for ($i=0; $i<$iterations; $i++) { |
$bin_hash = hash_ex($algo, $str_salt.$bin_hash.$i, true); |
} |
} else if ($mode == PASSWORD_VTS_MCF1_MODE_PS) { |
$payload = $str_password.$str_salt; |
$bin_hash = hash_ex($algo, $payload, true); |
$bin_hash = hash_ex($algo, $str_password.$str_salt, true); |
for ($i=0; $i<$iterations; $i++) { |
$bin_hash = hash_ex($algo, $bin_hash.$i.$str_salt, true); |
} |
} else if ($mode == PASSWORD_VTS_MCF1_MODE_SPS) { |
$payload = $str_salt.$str_password.$str_salt; |
$bin_hash = hash_ex($algo, $payload, true); |
$bin_hash = hash_ex($algo, $str_salt.$str_password.$str_salt, true); |
for ($i=0; $i<$iterations; $i++) { |
$bin_hash = hash_ex($algo, $str_salt.$bin_hash.$i.$str_salt, true); |
} |
} else if ($mode == PASSWORD_VTS_MCF1_MODE_HMAC) { |
$bin_hash = hash_hmac_ex($algo, $str_password, $str_salt, true); |
for ($i=0; $i<$iterations; $i++) { |
// https://security.stackexchange.com/questions/149299/rounds-in-a-hashing-function |
$bin_hash = hash_hmac_ex($algo, $str_password, $bin_hash.$i, true); |
} |
} else if ($mode == PASSWORD_VTS_MCF1_MODE_PBKDF2) { |
$bin_hash = hash_pbkdf2_ex($algo, $str_password, $str_salt, $iterations, 0, true); |
} else { |
182,7 → 193,7 |
$params = array(); |
$params['a'] = $algo; |
$params['m'] = $mode; |
if ($mode == PASSWORD_VTS_MCF1_MODE_PBKDF2) $params['i'] = $iterations; |
if ($iterations != 0) $params['i'] = $iterations; // i can be omitted if it is 0. |
return crypt_modular_format_encode(OID_MCF_VTS_V1, $bin_salt, $bin_hash, $params); |
} else { |
throw new Exception("Invalid VTS crypt version, expect 1."); |
210,7 → 221,7 |
if (!isset($params['i'])) throw new Exception('Param "i" (iterations) missing'); |
$iterations = $params['i']; |
} else { |
$iterations = 0; |
$iterations = isset($params['i']) ? $params['i'] : 0; |
} |
|
// Create a VTS MCF 1.0 hash based on the parameters of $hash and the password $password |
266,6 → 277,8 |
if ($options['mode'] == PASSWORD_VTS_MCF1_MODE_PBKDF2) { |
if (!isset($mcf['params']['i'])) throw new Exception('Param "i" (iterations) missing'); |
$options['iterations'] = (int)$mcf['params']['i']; |
} else { |
$options['iterations'] = isset($mcf['params']['i']) ? (int)$mcf['params']['i'] : 0; |
} |
|
return array( |
429,7 → 442,7 |
unset($options['salt_length']); |
} |
|
// iterations=0 means: Default, depending on the algo |
// For PBKDF2, iterations=0 means: Default, depending on the algo |
if (($options['iterations'] == 0/*default*/) && ($options2['mode'] == PASSWORD_VTS_MCF1_MODE_PBKDF2)) { |
$algo = $options2['algo']; |
$userland = !hash_pbkdf2_supported_natively($algo) && str_starts_with($algo, 'sha3-') && method_exists('\bb\Sha3\Sha3', 'hash_pbkdf2'); |
607,7 → 620,7 |
$options['iterations'] = PASSWORD_VTS_MCF1_DEFAULT_ITERATIONS; |
} |
} else { |
unset($options['iterations']); |
$options['iterations'] = isset($options['iterations']) ? $options['iterations'] : 0; |
} |
} |
return $options; |
691,4 → 704,43 |
'iterations' => 0 |
))); |
|
assert(vts_password_verify($password,$dummy = vts_password_hash($password, PASSWORD_VTS_MCF1, array( |
'algo' => 'sha3-512', |
'mode' => 'sps', |
'iterations' => 2 |
)))); |
//echo "'$dummy' ".strlen($dummy)."\n"; |
//var_dump(vts_password_get_info($dummy)); |
assert(false===vts_password_needs_rehash($dummy,PASSWORD_VTS_MCF1,array( |
'salt_length' => 51, |
'algo' => 'sha3-512', |
'mode' => 'sps', |
'iterations' => 2 |
))); |
assert(true===vts_password_needs_rehash($dummy,PASSWORD_VTS_MCF1,array( |
'salt_length' => 50, |
'algo' => 'sha3-256', |
'mode' => 'sps', |
'iterations' => 2 |
))); |
|
assert(vts_password_verify($password,$dummy = vts_password_hash($password, PASSWORD_VTS_MCF1, array( |
'algo' => 'sha3-512', |
'mode' => 'hmac', |
'iterations' => 2 |
)))); |
//echo "'$dummy' ".strlen($dummy)."\n"; |
//var_dump(vts_password_get_info($dummy)); |
assert(false===vts_password_needs_rehash($dummy,PASSWORD_VTS_MCF1,array( |
'salt_length' => 51, |
'algo' => 'sha3-512', |
'mode' => 'hmac', |
'iterations' => 2 |
))); |
assert(true===vts_password_needs_rehash($dummy,PASSWORD_VTS_MCF1,array( |
'salt_length' => 50, |
'algo' => 'sha3-256', |
'mode' => 'hmac', |
'iterations' => 2 |
))); |
*/ |