FingerprintHelper

java.lang.Object
- org.italiangrid.voms.util.FingerprintHelper

```
public class FingerprintHelper
extends java.lang.Object
```
A utility class for computing fingerprints of X.509 certificates.
This class provides methods to generate a cryptographic fingerprint (hash) of an X.509 certificate using a specified digest algorithm.

The default digest algorithm used is SHA-1.

Field Summary

Fields
Modifier and Type Field Description

static java.lang.String DEFAULT_DIGEST_ALGORITHM
The default message digest algorithm used for computing fingerprints.

Constructor Summary

Constructors
Constructor Description

FingerprintHelper()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static java.lang.String`	`getFingerprint(java.security.cert.X509Certificate cert)`	Computes the fingerprint of an X.509 certificate using the default digest algorithm.
`private static java.lang.String`	`hexify(byte[] bytes)`	Converts a byte array to a hexadecimal string representation.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - DEFAULT_DIGEST_ALGORITHM
```
public static final java.lang.String DEFAULT_DIGEST_ALGORITHM
```
    The default message digest algorithm used for computing fingerprints.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - FingerprintHelper
```
public FingerprintHelper()
```
- Method Detail
  - hexify
```
private static java.lang.String hexify(byte[] bytes)
```
    Converts a byte array to a hexadecimal string representation.
    
    Parameters:
    
    bytes - the byte array to convert
    
    Returns:
    
    a string containing the hexadecimal representation of the byte array
  - getFingerprint
```
public static java.lang.String getFingerprint(java.security.cert.X509Certificate cert)
                                       throws java.security.NoSuchAlgorithmException,
                                              java.security.cert.CertificateEncodingException
```
    Computes the fingerprint of an X.509 certificate using the default digest algorithm.
    
    Parameters:
    
    cert - the X.509 certificate for which to compute the fingerprint
    
    Returns:
    
    the fingerprint of the certificate as a hexadecimal string
    
    Throws:
    
    java.security.NoSuchAlgorithmException - if the specified digest algorithm is not available
    
    java.security.cert.CertificateEncodingException - if encoding the certificate fails