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How Do I Generate an SSE-C Encryption Key?
Updated on 2024-06-18 GMT+08:00
How Do I Generate an SSE-C Encryption Key?
Sample code of generating an SSE-C encryption key and its MD5 value:
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import java.nio.charset.Charset; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class SseCTool { public static void main(String[] args) { // Below is an encryption key example. The key can be changed as needed, but it must be 32 characters long (a 256-bit string). String keyString = System.getenv("ACCESS_KEY_ID"); // Compute the x-obs-server-side-encryption-customer-key header. String customerKey = toBase64String(keyString.getBytes(Charset.forName("UTF-8"))); System.out.println("customer key is : " + customerKey); // Compute the x-obs-server-side-encryption-customer-key-MD5 header. String customerKeyMD5 = computeMD5(fromBase64(customerKey)); System.out.println("md5 for customer key is : " + customerKeyMD5); } // Compute the Base64 character string. public static String toBase64String(byte[] data) { java.util.Base64.Encoder encoder = java.util.Base64.getEncoder(); return new String(encoder.encode(data), Charset.forName("UTF-8")); } // Compute the MD5 character string. public static String computeMD5(byte[] b64Data) { try { MessageDigest md5 = MessageDigest.getInstance("MD5"); md5.update(b64Data); byte[] byteArray = md5.digest(); return toBase64String(byteArray); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); return ""; } } public static byte[] fromBase64(String b64Data) { java.util.Base64.Decoder decoder = java.util.Base64.getDecoder(); return decoder.decode(b64Data.getBytes(Charset.forName("UTF-8"))); } } |
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