MessageDigestHelper Tutorial

The MessageDigestHelper class provides methods for generating message digests using different algorithms like MD5, SHA-1, and SHA-256. These methods can be used to create hashes for verifying data integrity, storing passwords securely, and other cryptographic purposes.

Methods

1. getMd5(String str)

Generates an MD5 hash for a given string.

• Parameters:
  • str: The input string to hash.
• Returns: The MD5 hash of the input string.

Example:

String md5Hash = MessageDigestHelper.getMd5("Hello World!");
// md5Hash will be the MD5 hash of "Hello World!"

2. getSHA1(String str)

Generates a SHA-1 hash for a given string.

• Parameters:
  • str: The input string to hash.
• Returns: The SHA-1 hash of the input string.

Example:

String sha1Hash = MessageDigestHelper.getSHA1("Hello World!");
// sha1Hash will be the SHA-1 hash of "Hello World!"

3. getSHA256(String str)

Generates a SHA-256 hash for a given string.

• Parameters:
  • str: The input string to hash.
• Returns: The SHA-256 hash of the input string.

Example:

String sha256Hash = MessageDigestHelper.getSHA256("Hello World!");
// sha256Hash will be the SHA-256 hash of "Hello World!"

4. getMd5AsBase64(String str)

Generates an MD5 hash for a given string and encodes it in Base64.

• Parameters:
  • str: The input string to hash.
• Returns: The Base64-encoded MD5 hash of the input string.

Example:

String md5Base64Hash = MessageDigestHelper.getMd5AsBase64("Hello World!");
// md5Base64Hash will be the Base64-encoded MD5 hash of "Hello World!"

5. getResult()

Returns the hash result for the configured algorithm, input string, and key (if provided).

• Returns: The hash result as a string.

Example:

MessageDigestHelper helper = new MessageDigestHelper()
    .setAlgorithmName("SHA-256")
    .setValue("Hello World!");
String hashResult = helper.getResult();
// hashResult will be the SHA-256 hash of "Hello World!"