Digest

Overview

Module

• package: org.eclipse.dirigible.sdk.utils
• source: utils/Digest.java

One-shot cryptographic-digest helpers — MD5, SHA-1, SHA-256, SHA-384, SHA-512. Each algorithm exposes overloads for byte[] or String input; MD5 and SHA-1 additionally expose Hex variants that return the digest as a printable hex string. Use the Hex variants when you want a printable identifier (cache keys, ETags, fingerprints) and the raw-byte variants when you'll feed the digest into another cryptographic step.

MD5 and SHA-1 are kept for compatibility with file fingerprinting / ETag use cases but should not be used for any new security-sensitive purpose — prefer sha256 or sha512. For password hashing use a dedicated PBKDF2 / bcrypt / Argon2 library, not these helpers.

Key Features:

• Five algorithms: MD5, SHA-1, SHA-256, SHA-384, SHA-512.
• Bytes or string input: Each algorithm has overloads for String and byte[] payloads.
• Hex string output for fingerprints: md5Hex / sha1Hex return a printable lower-case hex digest.

Example Usage:

import org.eclipse.dirigible.sdk.utils.Digest;

// Hex-encoded MD5 — fine for ETags, not for security
String etag = Digest.md5Hex("payload");

// Raw SHA-256 bytes — feed into HMAC, signatures, etc.
byte[] sha = Digest.sha256("payload");

// Long-form SHA-512
byte[] sha512 = Digest.sha512("payload");

Methods

md5()

Computes the MD5 digest of the input and returns the raw 16-byte digest.

public static byte[] md5(String input);
public static byte[] md5(byte[] input);

Parameter	Type	Description
input	String or byte[]	The payload to hash.

Returns

• Type: byte[]
• Description: The 16-byte MD5 digest.

md5Hex()

Computes the MD5 digest of the input and returns it as a lower-case hex string.

public static String md5Hex(String input);
public static String md5Hex(byte[] input);

Parameter	Type	Description
input	String or byte[]	The payload to hash.

Returns

• Type: String
• Description: The MD5 digest, lower-case hex-encoded (32 characters).

sha1()

Computes the SHA-1 digest of the input and returns the raw 20-byte digest.

public static byte[] sha1(String input);
public static byte[] sha1(byte[] input);

Parameter	Type	Description
input	String or byte[]	The payload to hash.

Returns

• Type: byte[]
• Description: The 20-byte SHA-1 digest.

sha1Hex()

Computes the SHA-1 digest of the input and returns it as a lower-case hex string.

public static String sha1Hex(String input);
public static String sha1Hex(byte[] input);

Parameter	Type	Description
input	String or byte[]	The payload to hash.

Returns

• Type: String
• Description: The SHA-1 digest, lower-case hex-encoded (40 characters).

sha256()

Computes the SHA-256 digest of the input and returns the raw 32-byte digest.

public static byte[] sha256(String input);
public static byte[] sha256(byte[] input);

Parameter	Type	Description
input	String or byte[]	The payload to hash.

Returns

• Type: byte[]
• Description: The 32-byte SHA-256 digest.

sha384()

Computes the SHA-384 digest of the input and returns the raw 48-byte digest.

public static byte[] sha384(String input);
public static byte[] sha384(byte[] input);

Parameter	Type	Description
input	String or byte[]	The payload to hash.

Returns

• Type: byte[]
• Description: The 48-byte SHA-384 digest.

sha512()

Computes the SHA-512 digest of the input and returns the raw 64-byte digest.

public static byte[] sha512(String input);
public static byte[] sha512(byte[] input);

Parameter	Type	Description
input	String or byte[]	The payload to hash.

Returns

• Type: byte[]
• Description: The 64-byte SHA-512 digest.