语言包含：
Javascript ，PHP，Java，Groovy，C#，Objective C，Go，Ruby，Python，Perl，Dart，Swift，Rust，Powershell。
Javascript HMAC SHA256
Run the code online with this jsfiddle. Dependent upon an open source js library calledhttp://code.google.com/p/crypto-js/.
<script src="http://crypto-js.googlecode.com/svn/tags/3.0.2/build/rollups/hmac-sha256.js"></script>
<script src="http://crypto-js.googlecode.com/svn/tags/3.0.2/build/components/enc-base64-min.js"></script>
<script>
var hash = CryptoJS.HmacSHA256("Message", "secret");
var hashInBase64 = CryptoJS.enc.Base64.stringify(hash);
document.write(hashInBase64);
</script>
PHP HMAC SHA256
PHP has built in methods for hash_hmac (PHP 5) and base64_encode (PHP 4, PHP 5) resulting in no outside dependencies. Say what you want about PHP but they have the cleanest code for this example.
$s = hash_hmac('sha256', 'Message', 'secret', true);
echo base64_encode($s);
Java HMAC SHA256
Dependent on Apache Commons Codec to encode in base64.
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
public class ApiSecurityExample {
public static void main(String[] args) {
try {
String secret = "secret";
String message = "Message";
Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(secret.getBytes(), "HmacSHA256");
sha256_HMAC.init(secret_key);
String hash = Base64.encodeBase64String(sha256_HMAC.doFinal(message.getBytes()));
System.out.println(hash);
}
catch (Exception e){
System.out.println("Error");
}
}
}
Groovy HMAC SHA256
It is mostly Java code but there are some slight differences. Adapted from Dev Takeout - Groovy HMAC/SHA256 representation.
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
def hmac_sha256(String secretKey, String data) {
try {
Mac mac = Mac.getInstance("HmacSHA256")
SecretKeySpec secretKeySpec = new SecretKeySpec(secretKey.getBytes(), "HmacSHA256")
mac.init(secretKeySpec)
byte[] digest = mac.doFinal(data.getBytes())
return digest
} catch (InvalidKeyException e) {
throw new RuntimeException("Invalid key exception while converting to HMac SHA256")
}
}
def hash = hmac_sha256("secret", "Message")
encodedData = hash.encodeBase64().toString()
log.info(encodedData)
C# HMAC SHA256
using System.Security.Cryptography;
namespace Test
{
public class MyHmac
{
private string CreateToken(string message, string secret)
{
secret = secret ?? "";
var encoding = new System.Text.ASCIIEncoding();
byte[] keyByte = encoding.GetBytes(secret);
byte[] messageBytes = encoding.GetBytes(message);
using (var hmacsha256 = new HMACSHA256(keyByte))
{
byte[] hashmessage = hmacsha256.ComputeHash(messageBytes);
return Convert.ToBase64String(hashmessage);
}
}
}
}
Objective C and Cocoa HMAC SHA256
Most of the code required was for converting to bae64 and working the NSString and NSData data types.
#import "AppDelegate.h"
#import <CommonCrypto/CommonHMAC.h>
@implementation AppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
NSString* key = @"secret";
NSString* data = @"Message";
const char *cKey = [key cStringUsingEncoding:NSASCIIStringEncoding];
const char *cData = [data cStringUsingEncoding:NSASCIIStringEncoding];
unsigned char cHMAC[CC_SHA256_DIGEST_LENGTH];
CCHmac(kCCHmacAlgSHA256, cKey, strlen(cKey), cData, strlen(cData), cHMAC);
NSData *hash = [[NSData alloc] initWithBytes:cHMAC length:sizeof(cHMAC)];
NSLog(@"%@", hash);
NSString* s = [AppDelegate base64forData:hash];
NSLog(s);
}
+ (NSString*)base64forData:(NSData*)theData {
const uint8_t* input = (const uint8_t*)[theData bytes];
NSInteger length = [theData length];
static char table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
NSMutableData* data = [NSMutableData dataWithLength:((length + 2) / 3) * 4];
uint8_t* output = (uint8_t*)data.mutableBytes;
NSInteger i;
for (i=0; i < length; i += 3) {
NSInteger value = 0;
NSInteger j;
for (j = i; j < (i + 3); j++) {
value <<= 8;
if (j < length) { value |= (0xFF & input[j]); } } NSInteger theIndex = (i / 3) * 4; output[theIndex + 0] = table[(value >> 18) & 0x3F];
output[theIndex + 1] = table[(value >> 12) & 0x3F];
output[theIndex + 2] = (i + 1) < length ? table[(value >> 6) & 0x3F] : '=';
output[theIndex + 3] = (i + 2) < length ? table[(value >> 0) & 0x3F] : '=';
}
return [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; }
@end
Go programming language - Golang HMAC SHA256
Try it online in your browser with Play GoLang
crypto/hmac package
package main
import (
"crypto/hmac"
"crypto/sha256"
"encoding/base64"
"fmt"
)
func ComputeHmac256(message string, secret string) string {
key := []byte(secret)
h := hmac.New(sha256.New, key)
h.Write([]byte(message))
return base64.StdEncoding.EncodeToString(h.Sum(nil))
}
func main() {
fmt.Println(ComputeHmac256("Message", "secret"))
}
Ruby HMAC SHA256
Requires openssl and base64.
require 'openssl'
require "base64"
hash = OpenSSL::HMAC.digest('sha256', "secret", "Message")
puts Base64.encode64(hash)
Python (2.7) HMAC SHA256
import hashlib
import hmac
import base64
message = bytes("Message").encode('utf-8')
secret = bytes("secret").encode('utf-8')
signature = base64.b64encode(hmac.new(secret, message, digestmod=hashlib.sha256).digest())
print(signature)
Tested with Python 2.7.6. Also, be sure not to name your python demo script the same as one of the imported libraries.
Perl HMAC SHA256
See Digest::SHA documentation. By convention, the Digest modules do not pad their Base64 output. To fix this you can test the length of the hash and append equal signs "=" until it is the length is a multiple of 4. We will use a modulus function below.
use Digest::SHA qw(hmac_sha256_base64);
$digest = hmac_sha256_base64("Message", "secret");
# digest is currently: qnR8UCqJggD55PohusaBNviGoOJ67HC6Btry4qXLVZc
# Fix padding of Base64 digests
while (length($digest) % 4) {
$digest .= '=';
}
print $digest;
# digest is now: qnR8UCqJggD55PohusaBNviGoOJ67HC6Btry4qXLVZc=
Dart HMAC SHA256
Dependent upon the Dart crypto package.
import 'dart:html';
import 'dart:convert';
import 'package:crypto/crypto.dart';
void main() {
String secret = 'secret';
String message = 'Message';
List<int> secretBytes = UTF8.encode('secret');
List<int> messageBytes = UTF8.encode('Message');
var hmac = new HMAC(new SHA256(), secretBytes);
hmac.add(messageBytes);
var digest = hmac.close();
var hash = CryptoUtils.bytesToBase64(digest);
// output to html page
querySelector('#hash').text = hash;
// hash => qnR8UCqJggD55PohusaBNviGoOJ67HC6Btry4qXLVZc=
}
Swift HMAC SHA256
I have not verified but see this stackOverflow post
Rust
Take a look at the alco/rust-digest repository for Rust (lang) guidance. I have not verified yet.
Powershell (Windows) HMAC SHA256
Mostly wrapping of .NET libraries but useful to see it in powershell's befuddling syntax. See code as gist
$message = 'Message'
$secret = 'secret'
$hmacsha = New-Object System.Security.Cryptography.HMACSHA256
$hmacsha.key = [Text.Encoding]::ASCII.GetBytes($secret)
$signature = $hmacsha.ComputeHash([Text.Encoding]::ASCII.GetBytes($message))
$signature = [Convert]::ToBase64String($signature)
echo $signature
# Do we get the expected signature?
echo ($signature -eq 'qnR8UCqJggD55PohusaBNviGoOJ67HC6Btry4qXLVZc=')
原文
