Rust

Duplicate Java HMAC-SHA1 using Chilkat

See more Encryption Examples

This example uses Chilkat to produce the same results as this Java code:

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Hex;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;

public void hmacSignatureExample() throws NoSuchAlgorithmException,
InvalidKeyException {

final String method = "POST";
final Long epoch = 1456765639015L; // Hardcoding for this example
final String uri = "/api/v5/policy/1234567890";
final String newline = "\n";

final String privateKey = "qwfvUeVRWAwyjlAzGivefFPTg+m6QtBPmDVv7Ra
/u7K3UuVVRhrZ/qc8EPh8IGJatuxsWD4EX+D9qE/eVvLTpw==";
final String publicKey = "16baedbe244b6c063968850716afb319a";

// Prepare the signature
final String plainText = method + newline + epoch + newline + uri + newline;

// Hash the plaintext with the private key
final byte[] keyBytes = privateKey.getBytes();
final Key key = new SecretKeySpec(keyBytes, 0, keyBytes.length, "HmacSHA1");
final Mac mac = Mac.getInstance("HmacSHA1");
mac.init(key);
String signatureHash = new String(Hex.encodeHex(mac.doFinal(plainText.
getBytes())));

// Prefix with public key
signatureHash = publicKey + ":" + signatureHash;

// Base64 encode to produce AUTHORIZATION
final String authorization = new String(Base64.encodeBase64(signatureHash.
getBytes()));
}

Rust

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// This is clearly in base64 encoding.
let private_key = "qwfvUeVRWAwyjlAzGivefFPTg+m6QtBPmDVv7Ra/u7K3UuVVRhrZ/qc8EPh8IGJatuxsWD4EX+D9qE/eVvLTpw==".to_string();

// This is clearly in the hex encoding.
let public_key = "16baedbe244b6c063968850716afb319a".to_string();

let plain_text = "POST\n1456765639015\n/api/v5/policy/1234567890\n".to_string();

let crypt = chilkat::Crypt2::new();

// We want HMAC-SHA1.
crypt.set_mac_algorithm("HMAC");
crypt.set_hash_algorithm("SHA1");

// The Java code (above) is literally using the us-ascii chars of the base64 string as the HMAC key.
// (It is NOT using the base64 decoded bytes.)
let _ = crypt.set_mac_key_encoded(&private_key, "us-ascii");

// We want our HMAC-SHA1 output to be a hex string.
crypt.set_encoding_mode("hex_lower");

let hmac_hex = crypt.mac_string_enc(&plain_text).unwrap_or_default();

println!("{}", hmac_hex);

// The expected result is: dd3e8440f6b550f152156ea5e12d3e20b262adae

let sb_signature_hash = chilkat::StringBuilder::new();
let _ = sb_signature_hash.append(&public_key);
let _ = sb_signature_hash.append(":");
let _ = sb_signature_hash.append(&hmac_hex);

let authorization = sb_signature_hash.get_encoded("base64", "utf-8").unwrap_or_default();
println!("Authorization: {}", authorization);

// The expected result is:  MTZiYWVkYmUyNDRiNmMwNjM5Njg4NTA3MTZhZmIzMTlhOmRkM2U4NDQwZjZiNTUwZjE1MjE1NmVhNWUxMmQzZTIwYjI2MmFkYWU=