iText.Signatures.DigestAlgorithms Class Reference

Class that contains a map with the different message digest algorithms. More...

Static Public Member Functions
static IDigest	GetMessageDigestFromOid (String digestOid)
	Get a digest algorithm. More...
static IDigest	GetMessageDigest (String hashAlgorithm)
	Creates a MessageDigest object that can be used to create a hash. More...
static byte[]	Digest (Stream data, String hashAlgorithm)
	Creates a hash using a specific digest algorithm and a provider. More...
static byte[]	Digest (Stream data, IDigest messageDigest)
	Create a digest based on the inputstream. More...
static String	GetDigest (String oid)
	Gets the digest name for a certain id More...
static String	GetAllowedDigest (String name)
	Returns the id of a digest algorithms that is allowed in PDF, or null if it isn't allowed. More...

Static Public Attributes
const String	SHA1 = "SHA-1"
	Algorithm available for signatures since PDF 1.3. More...
const String	SHA256 = "SHA-256"
	Algorithm available for signatures since PDF 1.6. More...
const String	SHA384 = "SHA-384"
	Algorithm available for signatures since PDF 1.7. More...
const String	SHA512 = "SHA-512"
	Algorithm available for signatures since PDF 1.7. More...
const String	RIPEMD160 = "RIPEMD160"
	Algorithm available for signatures since PDF 1.7. More...

Detailed Description

Class that contains a map with the different message digest algorithms.

Member Function Documentation

Digest() [1/2]

static byte [] iText.Signatures.DigestAlgorithms.Digest ( Stream  data, IDigest  messageDigest  )

inlinestatic

Create a digest based on the inputstream.

Parameters

data	data to be digested
messageDigest	algorithm to be used

Returns

digest of the data

Digest() [2/2]

static byte [] iText.Signatures.DigestAlgorithms.Digest ( Stream  data, String  hashAlgorithm  )

inlinestatic

Creates a hash using a specific digest algorithm and a provider.

Parameters

data	the message of which you want to create a hash
hashAlgorithm	the algorithm used to create the hash

Returns

the hash

GetAllowedDigest()

static String iText.Signatures.DigestAlgorithms.GetAllowedDigest ( String  name )

inlinestatic

Returns the id of a digest algorithms that is allowed in PDF, or null if it isn't allowed.

Parameters

name	The name of the digest algorithm.

Returns

An oid.

GetDigest()

static String iText.Signatures.DigestAlgorithms.GetDigest ( String  oid )

inlinestatic

Gets the digest name for a certain id

Parameters

oid	an id (for instance "1.2.840.113549.2.5")

Returns

a digest name (for instance "MD5")

GetMessageDigest()

static IDigest iText.Signatures.DigestAlgorithms.GetMessageDigest ( String  hashAlgorithm )

inlinestatic

Creates a MessageDigest object that can be used to create a hash.

Parameters

hashAlgorithm

the algorithm you want to use to create a hash

Returns

a MessageDigest object

GetMessageDigestFromOid()

static IDigest iText.Signatures.DigestAlgorithms.GetMessageDigestFromOid ( String  digestOid )

inlinestatic

Get a digest algorithm.

Parameters

digestOid

oid of the digest algorithm

Returns

MessageDigest object

Member Data Documentation

RIPEMD160

const String iText.Signatures.DigestAlgorithms.RIPEMD160 = "RIPEMD160"

static

Algorithm available for signatures since PDF 1.7.

SHA1

const String iText.Signatures.DigestAlgorithms.SHA1 = "SHA-1"

static

Algorithm available for signatures since PDF 1.3.

SHA256

const String iText.Signatures.DigestAlgorithms.SHA256 = "SHA-256"

static

Algorithm available for signatures since PDF 1.6.

SHA384

const String iText.Signatures.DigestAlgorithms.SHA384 = "SHA-384"

static

Algorithm available for signatures since PDF 1.7.

SHA512

const String iText.Signatures.DigestAlgorithms.SHA512 = "SHA-512"

static

Algorithm available for signatures since PDF 1.7.