Class CryptoUtil

java.lang.Object

com.itextpdf.kernel.crypto.CryptoUtil

public class CryptoUtil
extends Object

This file is a helper class for internal usage only. Be aware that it's API and functionality may be changed in the future.

Field Summary

Fields

Modifier and Type	Field	Description
private static final IBouncyCastleFactory	BOUNCY_CASTLE_FACTORY

Constructor Summary

Constructors

Modifier	Constructor	Description
private	CryptoUtil()

Method Summary

Modifier and Type	Method	Description
static IASN1OutputStream	createAsn1OutputStream(OutputStream outputStream, String asn1Encoding)	Creates IASN1OutputStream instance and asserts for unexpected ASN1 encodings.
(package private) static MessageDigest	getMessageDigest(String hashAlgorithm, String provider)
static Certificate	readPublicCertificate(InputStream is)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

BOUNCY_CASTLE_FACTORY

private static final IBouncyCastleFactory BOUNCY_CASTLE_FACTORY

Constructor Details

CryptoUtil

private CryptoUtil()

Method Details

readPublicCertificate

public static Certificate readPublicCertificate(InputStream is)
                                         throws CertificateException

Throws:

CertificateException

createAsn1OutputStream

public static IASN1OutputStream createAsn1OutputStream(OutputStream outputStream,
 String asn1Encoding)

Creates IASN1OutputStream instance and asserts for unexpected ASN1 encodings.

Parameters:

outputStream - the underlying stream

asn1Encoding - ASN1 encoding that will be used for writing. Only DER and BER are allowed as values. See also IASN1Encoding.

Returns:

an IASN1OutputStream instance. Exact stream implementation is chosen based on passed encoding.

getMessageDigest

static MessageDigest getMessageDigest(String hashAlgorithm,
 String provider)
                               throws NoSuchAlgorithmException,
NoSuchProviderException

Throws:

NoSuchAlgorithmException

NoSuchProviderException