kz.gamma.cms
Class SignerInformation

java.lang.Object
  kz.gamma.cms.SignerInformation

public class SignerInformation
extends java.lang.Object

an expanded SignerInfo block from a CMS Signed message

Field Summary

private CMSProcessable	content
private DERObjectIdentifier	contentType
private AlgorithmIdentifier	digestAlgorithm
private AlgorithmIdentifier	encryptionAlgorithm
private byte[]	hash
private SignerInfo	info
private byte[]	resultDigest
private SignerId	sid
private byte[]	signature
private ASN1Set	signedAttributes
private ASN1Set	unsignedAttributes

Constructor Summary

SignerInformation(SignerInfo info, DERObjectIdentifier contentType, CMSProcessable content, byte[] digest)

Method Summary

private DigestInfo	derDecode(byte[] encoding)
private boolean	doVerify(java.security.PublicKey key, AttributeTable signedAttrTable, java.lang.String sigProvider)
private byte[]	encodeObj(DEREncodable obj)
byte[]	getContentDigest() return the content digest that was calculated during verification.
java.lang.String	getDigestAlgOID() return the object identifier for the signature.
byte[]	getDigestAlgParams() return the signature parameters, or null if there aren't any.
byte[]	getEncodedSignedAttributes() return the DER encoding of the signed attributes.
java.lang.String	getEncryptionAlgOID() return the object identifier for the signature.
byte[]	getEncryptionAlgParams() return the signature/encyrption algorithm parameters, or null if there aren't any.
SignerId	getSID()
byte[]	getSignature() return the encoded signature
AttributeTable	getSignedAttributes() return a table of the signed attributes - indexed by the OID of the attribute.
byte[]	getSignedAttributesByte()
AttributeTable	getUnsignedAttributes() return a table of the unsigned attributes indexed by the OID of the attribute.
int	getVersion() return the version number for this objects underlying SignerInfo structure.
private boolean	isNull(DEREncodable o)
static SignerInformation	replaceUnsignedAttributes(SignerInformation signerInformation, AttributeTable unsignedAttributes) Return a signer information object with the passed in unsigned attributes replacing the ones that are current associated with the object passed in.
SignerInfo	toSignerInfo() Return the base ASN.1 CMS structure that this object contains.
boolean	verify(java.security.PublicKey key, java.lang.String sigProvider) verify that the given public key succesfully handles and confirms the signature associated with this signer.
boolean	verify(java.security.cert.X509Certificate cert, java.lang.String sigProvider) verify that the given certificate succesfully handles and confirms the signature associated with this signer and, if a signingTime attribute is available, that the certificate was valid at the time the signature was generated.
private boolean	verifyDigest(byte[] digest, java.security.PublicKey key, byte[] signature, java.lang.String sigProvider)

Methods inherited from class java.lang.Object

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

Field Detail

sid

private SignerId sid

info

private SignerInfo info

digestAlgorithm

private AlgorithmIdentifier digestAlgorithm

encryptionAlgorithm

private AlgorithmIdentifier encryptionAlgorithm

signedAttributes

private ASN1Set signedAttributes

unsignedAttributes

private ASN1Set unsignedAttributes

content

private CMSProcessable content

signature

private byte[] signature

contentType

private DERObjectIdentifier contentType

hash

private byte[] hash

resultDigest

private byte[] resultDigest

Constructor Detail

SignerInformation

SignerInformation(SignerInfo info,
                  DERObjectIdentifier contentType,
                  CMSProcessable content,
                  byte[] digest)

Method Detail

encodeObj

private byte[] encodeObj(DEREncodable obj)
                  throws java.io.IOException

Throws:

java.io.IOException

getSID

public SignerId getSID()

getVersion

public int getVersion()

return the version number for this objects underlying SignerInfo structure.

getDigestAlgOID

public java.lang.String getDigestAlgOID()

return the object identifier for the signature.

getDigestAlgParams

public byte[] getDigestAlgParams()

return the signature parameters, or null if there aren't any.

getContentDigest

public byte[] getContentDigest()

return the content digest that was calculated during verification.

getEncryptionAlgOID

public java.lang.String getEncryptionAlgOID()

return the object identifier for the signature.

getEncryptionAlgParams

public byte[] getEncryptionAlgParams()

return the signature/encyrption algorithm parameters, or null if there aren't any.

getSignedAttributes

public AttributeTable getSignedAttributes()

return a table of the signed attributes - indexed by the OID of the attribute.

getSignedAttributesByte

public byte[] getSignedAttributesByte()

getUnsignedAttributes

public AttributeTable getUnsignedAttributes()

return a table of the unsigned attributes indexed by the OID of the attribute.

getSignature

public byte[] getSignature()

return the encoded signature

getEncodedSignedAttributes

public byte[] getEncodedSignedAttributes()
                                  throws java.io.IOException

return the DER encoding of the signed attributes.

Throws:

java.io.IOException - if an encoding error occurs.

doVerify

private boolean doVerify(java.security.PublicKey key,
                         AttributeTable signedAttrTable,
                         java.lang.String sigProvider)
                  throws CMSException,
                         java.security.NoSuchAlgorithmException,
                         java.security.NoSuchProviderException

Throws:

CMSException

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

isNull

private boolean isNull(DEREncodable o)

derDecode

private DigestInfo derDecode(byte[] encoding)
                      throws java.io.IOException,
                             CMSException

Throws:

java.io.IOException

CMSException

verifyDigest

private boolean verifyDigest(byte[] digest,
                             java.security.PublicKey key,
                             byte[] signature,
                             java.lang.String sigProvider)
                      throws java.security.NoSuchAlgorithmException,
                             java.security.NoSuchProviderException,
                             CMSException

Throws:

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

CMSException

verify

public boolean verify(java.security.PublicKey key,
                      java.lang.String sigProvider)
               throws java.security.NoSuchAlgorithmException,
                      java.security.NoSuchProviderException,
                      CMSException

verify that the given public key succesfully handles and confirms the signature associated with this signer.

Throws:

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

CMSException

verify

public boolean verify(java.security.cert.X509Certificate cert,
                      java.lang.String sigProvider)
               throws java.security.NoSuchAlgorithmException,
                      java.security.NoSuchProviderException,
                      java.security.cert.CertificateExpiredException,
                      java.security.cert.CertificateNotYetValidException,
                      CMSException

verify that the given certificate succesfully handles and confirms the signature associated with this signer and, if a signingTime attribute is available, that the certificate was valid at the time the signature was generated.

Throws:

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

java.security.cert.CertificateExpiredException

java.security.cert.CertificateNotYetValidException

CMSException

toSignerInfo

public SignerInfo toSignerInfo()

Return the base ASN.1 CMS structure that this object contains.

Returns:

an object containing a CMS SignerInfo structure.

replaceUnsignedAttributes

public static SignerInformation replaceUnsignedAttributes(SignerInformation signerInformation,
                                                          AttributeTable unsignedAttributes)

Return a signer information object with the passed in unsigned attributes replacing the ones that are current associated with the object passed in.

Parameters:

signerInformation - the signerInfo to be used as the basis.

unsignedAttributes - the unsigned attributes to add.

Returns:

a copy of the original SignerInformationObject with the changed attributes.