Package org.bouncycastle.asn1.cms

Class SignerInfo

java.lang.Object

org.bouncycastle.asn1.ASN1Object

org.bouncycastle.asn1.cms.SignerInfo

All Implemented Interfaces:

ASN1Encodable, Encodable

public class SignerInfo
extends ASN1Object

RFC 5652: Signature container per Signer, see SignerIdentifier.

 PKCS#7:

 SignerInfo ::= SEQUENCE {
     version                   Version,
     sid                       SignerIdentifier,
     digestAlgorithm           DigestAlgorithmIdentifier,
     authenticatedAttributes   [0] IMPLICIT Attributes OPTIONAL,
     digestEncryptionAlgorithm DigestEncryptionAlgorithmIdentifier,
     encryptedDigest           EncryptedDigest,
     unauthenticatedAttributes [1] IMPLICIT Attributes OPTIONAL
 }

 EncryptedDigest ::= OCTET STRING

 DigestAlgorithmIdentifier ::= AlgorithmIdentifier

 DigestEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier

 -----------------------------------------

 RFC 5652:

 SignerInfo ::= SEQUENCE {
     version            CMSVersion,
     sid                SignerIdentifier,
     digestAlgorithm    DigestAlgorithmIdentifier,
     signedAttrs        [0] IMPLICIT SignedAttributes OPTIONAL,
     signatureAlgorithm SignatureAlgorithmIdentifier,
     signature          SignatureValue,
     unsignedAttrs      [1] IMPLICIT UnsignedAttributes OPTIONAL
 }

 -- SignerIdentifier referenced certificates are at containing
 -- SignedData certificates element.

 SignerIdentifier ::= CHOICE {
     issuerAndSerialNumber IssuerAndSerialNumber,
     subjectKeyIdentifier  [0] SubjectKeyIdentifier }

 -- See Attributes for generalized SET OF Attribute

 SignedAttributes   ::= SET SIZE (1..MAX) OF Attribute
 UnsignedAttributes ::= SET SIZE (1..MAX) OF Attribute
 
 Attribute ::= SEQUENCE {
     attrType   OBJECT IDENTIFIER,
     attrValues SET OF AttributeValue }

 AttributeValue ::= ANY
 
 SignatureValue ::= OCTET STRING
 

Constructor Summary

Constructors

Constructor	Description
SignerInfo(SignerIdentifier sid, AlgorithmIdentifier digAlgorithm, ASN1Set authenticatedAttributes, AlgorithmIdentifier digEncryptionAlgorithm, ASN1OctetString encryptedDigest, ASN1Set unauthenticatedAttributes)
SignerInfo(SignerIdentifier sid, AlgorithmIdentifier digAlgorithm, Attributes authenticatedAttributes, AlgorithmIdentifier digEncryptionAlgorithm, ASN1OctetString encryptedDigest, Attributes unauthenticatedAttributes)

Method Summary

Modifier and Type	Method	Description
ASN1Set	getAuthenticatedAttributes()
AlgorithmIdentifier	getDigestAlgorithm()
AlgorithmIdentifier	getDigestEncryptionAlgorithm()
ASN1OctetString	getEncryptedDigest()
static SignerInfo	getInstance(Object o)	Return a SignerInfo object from the given input
SignerIdentifier	getSID()
ASN1Set	getUnauthenticatedAttributes()
ASN1Integer	getVersion()
ASN1Primitive	toASN1Primitive()	Produce an object suitable for an ASN1OutputStream.

Methods inherited from class org.bouncycastle.asn1.ASN1Object

equals, getEncoded, getEncoded, hasEncodedTagValue, hashCode

Methods inherited from class java.lang.Object

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

Constructor Details

SignerInfo

public SignerInfo(SignerIdentifier sid,
 AlgorithmIdentifier digAlgorithm,
 ASN1Set authenticatedAttributes,
 AlgorithmIdentifier digEncryptionAlgorithm,
 ASN1OctetString encryptedDigest,
 ASN1Set unauthenticatedAttributes)

Parameters:

sid -

digAlgorithm - CMS knows as 'digestAlgorithm'

authenticatedAttributes - CMS knows as 'signedAttrs'

digEncryptionAlgorithm - CMS knows as 'signatureAlgorithm'

encryptedDigest - CMS knows as 'signature'

unauthenticatedAttributes - CMS knows as 'unsignedAttrs'

SignerInfo

public SignerInfo(SignerIdentifier sid,
 AlgorithmIdentifier digAlgorithm,
 Attributes authenticatedAttributes,
 AlgorithmIdentifier digEncryptionAlgorithm,
 ASN1OctetString encryptedDigest,
 Attributes unauthenticatedAttributes)

Parameters:

sid -

digAlgorithm - CMS knows as 'digestAlgorithm'

authenticatedAttributes - CMS knows as 'signedAttrs'

digEncryptionAlgorithm - CMS knows as 'signatureAlgorithm'

encryptedDigest - CMS knows as 'signature'

unauthenticatedAttributes - CMS knows as 'unsignedAttrs'

Method Details

getInstance

public static SignerInfo getInstance(Object o)
                              throws IllegalArgumentException

Return a SignerInfo object from the given input

Accepted inputs:

• null → null
• SignerInfo object
• ASN1Sequence input formats with SignerInfo structure inside

Parameters:

o - the object we want converted.

Throws:

IllegalArgumentException - if the object cannot be converted.

getVersion

public ASN1Integer getVersion()

getSID

public SignerIdentifier getSID()

getAuthenticatedAttributes

public ASN1Set getAuthenticatedAttributes()

getDigestAlgorithm

public AlgorithmIdentifier getDigestAlgorithm()

getEncryptedDigest

public ASN1OctetString getEncryptedDigest()

getDigestEncryptionAlgorithm

public AlgorithmIdentifier getDigestEncryptionAlgorithm()

getUnauthenticatedAttributes

public ASN1Set getUnauthenticatedAttributes()

toASN1Primitive

public ASN1Primitive toASN1Primitive()

Produce an object suitable for an ASN1OutputStream.

Specified by:

toASN1Primitive in interface ASN1Encodable

Specified by:

toASN1Primitive in class ASN1Object

Returns:

a primitive representation of this object.