PHP 8.3.0 RC 6 available for testing

openssl_digest

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

openssl_digest计算摘要

说明

openssl_digest(string $data, string $digest_algo, bool $binary = false): string|false

使用给定的方法计算给定数据的摘要哈希值,并返回一个原始的或16进制编码的字符串。

参数

data

给定的数据。

digest_algo

要使用的摘要方法,比如 "sha256", 查看 openssl_get_md_methods() 函数获取更多可用的摘要方法。

binary

true 时将会返回原始输出数据,否则返回值将会是16进制。

返回值

成功,返回摘要哈希值, 或者在失败时返回 false.

错误/异常

如果通过 digest_algo 参数传递的是未知的摘要算法,将会抛出 E_WARNING 级的错误。

参见

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User Contributed Notes 3 notes

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9
mwgamera at gmail dot com
10 years 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.
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-26
skyblackhawk at yahoo dot it
12 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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-26
Anonymous
9 years 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.
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