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--- uphp:functions:hash_hmac [2019/08/16 09:43]
admin [See Also]
+++ uphp:functions:hash_hmac [2021/09/13 05:57]
@@ Line 1: / Line 1: @@
-======hash_hmac======
-<badge>WMMEGA FW >= 2.1030</badge> <badge>WM2 FW >= 3.1130</badge>
-Generate a keyed hash value using the HMAC method
-====Description====
-<well size="sm"><html>
-<span style="font-size:125%;color:green">string
-<span style="color:black">hash_hmac (
-<span style="color:green">string
-<span style="color:blue">$algorithm
-<span style="color:black">,
-<span style="color:green">string
-<span style="color:blue">$data
-<span style="color:black">,
-<span style="color:green">string
-<span style="color:blue">$key
-<span style="color:black">)
-</html></well>
-This can be used for cryptography or just for checksum calculations.
-====Parameter====
-<html><b><span style="color:blue">$algorithm<span style="color:black"></b>:  Name of selected hashing algorithm. Current algorithms supported are: </html>
-^ Parameter  ^ Algorithm  ^ Return Size (characters)  |
-| md5        | MD5        | 32                   |
-| sha1       | SHA-1      | 40                   |
-| sha224     | SHA-224    | 56                   |
-| sha256     | SHA-256    | 64                   |
-| sha384     | SHA-384    | 96                   |
-| sha512     | SHA-512    | 128                  |
-<html><b><span style="color:blue">$data<span style="color:black"></b>:  String of characters to calculate hash for</html>
-<html><b><span style="color:blue">$key<span style="color:black"></b>:  String of characters of key to be used in hash calculation </html>
-====Return Values====
-<html><b><span style="color:green">String<span style="color:black"></b>:  Hash result (as hexadecimal number) of <b><span style="color:blue">data</b></span>.  See above for expected length</html>
-====Example====
-<code php>
-<?
-// Get the parameters from the URL
-$algo=$_GET['algorithm'];
-$key=$_GET['key'];;
-$data=$_GET['data'];
-// make sure parameters are passed properly
-if (!$algo) {
-    print("You need to specify an algorithm");
-    die();
-}
-if (!$key) {
-    print("You need to specify a key");
-    die();
-}
-if (!$data) {
-    print("You need to specify a data parameter");
-    die();
-}
-// calculate the hash
-$res = hash_hmac($algo,$data,$key);
-// output the rsults
-print($algo." hash for key ".$key." and data ".$data." = ".$res);
-?>
-</code>
-====See Also====
-[[md5()]] - Calculate the MD5 hash of a <html><b><span style="color:green">string</b></html>
-[[sha1()]] - Calculate the SHA-1 hash of a <html><b><span style="color:green">string</b></html>
-[[md5_file()]] - Calculate the MD5 hash of a file
-[[aes_decrypt()]] - Decrypt a string using the AES algorithm
-[[aes_encrypt()]] - Encrypt a string using the AES algorithm

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