openssl_digest

(PHP 5 >= 5.3.0)

openssl_digestComputa un método de resumen

Descripción

string openssl_digest ( string $data , string $method [, bool $raw_output = false ] )

Computa un valor hash del método de resumen (digest) para la información dada usando el método dado, y devuelve una cadena codificada en bruto o mediante binhex.

Advertencia

Esta función no está documentada actualmente, solamente se encuentra disponible la lista de parámetros.

Parámetros

data

La información.

method

El método de resumen.

raw_output

Establecido a TRUE devolverá información de salida en bruto, si no, devolverá el valor codificado mediante binhex.

Valores devueltos

Devuelve el valor hash del método de resumen si se tuvo éxito o FALSE en caso de error.

Errores/Excepciones

Emite un error de nivel E_WARNING si se pasa un algoritmo de cifrado desconocido mediante el parámetro method.

Ver también

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User Contributed Notes 3 notes

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1
mwgamera at gmail dot com
1 year ago
The second argument should be one of the values returned by openssl_get_md_methods() rather than hash_algos(). ‘Hash’ and ‘OpenSSL’ are independent extensions and support different selection of digest algorithms. Notably, Hash supports some non-cryptographic hashes like adler or crc.
up
0
Anonymous
5 months ago
Hmm.. really @mwgamera? openssl_get_cipher_methods() returns cipher methods but openssl_digest() expects a digest method in the second parameter. However even the docu on this page links to the openssl_get_cipher_methods() method in the "See also" section (however this can be a coincidence). Shouldn't it be a digest method from openssl_get_md_methods() instead openssl_get_cipher_methods()?

I'm not very experienced in cryptography but I don't really understand why you would pass a cipher method to a hash function instead of a digest method.
up
-3
skyblackhawk at yahoo dot it
3 years ago
Example:
// $fileBuffer is buffer of file in open mode or a generic stream...
$fingerPrint = openssl_digest ($fileBuffer , "sha512");

$method parameter is one of hash_algos() array;

<? echo"<PRE>";
     
var_dump(hash_algos());
      echo
"</PRE>"
?>

Output:

array(42) {
  [0]=>
  string(3) "md2"
  [1]=>
  string(3) "md4"
  [2]=>
  string(3) "md5"
  [3]=>
  string(4) "sha1"
  [4]=>
  string(6) "sha224"
  [5]=>
  string(6) "sha256"
  [6]=>
  string(6) "sha384"
  [7]=>
  string(6) "sha512"
  [8]=>
  string(9) "ripemd128"
  [9]=>
  string(9) "ripemd160"
  [10]=>
  string(9) "ripemd256"
  [11]=>
  string(9) "ripemd320"
  [12]=>
  string(9) "whirlpool"
  [13]=>
  string(10) "tiger128,3"
  [14]=>
  string(10) "tiger160,3"
  [15]=>
  string(10) "tiger192,3"
  [16]=>
  string(10) "tiger128,4"
  [17]=>
  string(10) "tiger160,4"
  [18]=>
  string(10) "tiger192,4"
  [19]=>
  string(6) "snefru"
  [20]=>
  string(9) "snefru256"
  [21]=>
  string(4) "gost"
  [22]=>
  string(7) "adler32"
  [23]=>
  string(5) "crc32"
  [24]=>
  string(6) "crc32b"
  [25]=>
  string(7) "salsa10"
  [26]=>
  string(7) "salsa20"
  [27]=>
  string(10) "haval128,3"
  [28]=>
  string(10) "haval160,3"
  [29]=>
  string(10) "haval192,3"
  [30]=>
  string(10) "haval224,3"
  [31]=>
  string(10) "haval256,3"
  [32]=>
  string(10) "haval128,4"
  [33]=>
  string(10) "haval160,4"
  [34]=>
  string(10) "haval192,4"
  [35]=>
  string(10) "haval224,4"
  [36]=>
  string(10) "haval256,4"
  [37]=>
  string(10) "haval128,5"
  [38]=>
  string(10) "haval160,5"
  [39]=>
  string(10) "haval192,5"
  [40]=>
  string(10) "haval224,5"
  [41]=>
  string(10) "haval256,5"
}
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