2.3. Digest

Ce package a pour objet de permettre les calculs d’empreintes au sein de Vitam.

Les formats supportés sont :

• MD5
• SHA-1
• SHA-256
• SHA-384
• SHA-512

2.3.1. Usage

Digest digest = new Digest(DigestType.MD5);
// One of
digest.update(File);
digest.update(byte []);
digest.update(ByteBuffer);
digest.update(String);
digest.update(InputStream);
digest.update(FileChannel);

// Or using helpers
Digest digest = Digest.digest(InputStream, DigestType);
Digest digest = Digest.digest(File, DigestType);

// Get the result
byte[] bresult = digest.digest();
String sresult = digest.digestHex(); // in Hexa format
String sresult = digest.toString(); // in Hexa format

// Compare the result: Note that only same DigestType can be used
boolean same = digest.equals(digest2);
boolean same = digest.equals(bresult);
boolean same = digest.equals(sresult);
boolean same = digest.equalsWithType(bresult, DigestType); // same as equals(bresult)
boolean same = digest.equalsWithType(sresult, DigestType); // same as equals(sresult)