SignerInfo (Bouncy Castle Library 1.85 API Specification)
Date: 2026-07-12

org.bouncycastle.asn1.pkcs

## Class SignerInfo

- java.lang.Object
- - org.bouncycastle.asn1.ASN1Object
  - - org.bouncycastle.asn1.pkcs.SignerInfo

- All Implemented Interfaces:
    ASN1Encodable, Encodable

      public class SignerInfo
      extends ASN1Object

  a PKCS#7 signer info object.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `SignerInfo(ASN1Integer version, IssuerAndSerialNumber issuerAndSerialNumber, AlgorithmIdentifier digAlgorithm, ASN1Set authenticatedAttributes, AlgorithmIdentifier digEncryptionAlgorithm, ASN1OctetString encryptedDigest, ASN1Set unauthenticatedAttributes)`
    `SignerInfo(ASN1Sequence seq)`

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `ASN1Set` | `getAuthenticatedAttributes()`
    `AlgorithmIdentifier` | `getDigestAlgorithm()`
    `AlgorithmIdentifier` | `getDigestEncryptionAlgorithm()`
    `ASN1OctetString` | `getEncryptedDigest()`
    `static SignerInfo` | `getInstance(java.lang.Object o)`
    `IssuerAndSerialNumber` | `getIssuerAndSerialNumber()`
    `ASN1Set` | `getUnauthenticatedAttributes()`
    `ASN1Integer` | `getVersion()`
    `ASN1Primitive` | `toASN1Primitive()` Produce an object suitable for an ASN1OutputStream.

    - ### Methods inherited from class org.bouncycastle.asn1.ASN1Object

      `encodeTo, encodeTo, equals, getEncoded, getEncoded, hasEncodedTagValue, hashCode`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### SignerInfo

          public SignerInfo(ASN1Integer version,
                            IssuerAndSerialNumber issuerAndSerialNumber,
                            AlgorithmIdentifier digAlgorithm,
                            ASN1Set authenticatedAttributes,
                            AlgorithmIdentifier digEncryptionAlgorithm,
                            ASN1OctetString encryptedDigest,
                            ASN1Set unauthenticatedAttributes)

    - #### SignerInfo

          public SignerInfo(ASN1Sequence seq)

  - ### Method Detail

    - #### getInstance

          public static SignerInfo getInstance(java.lang.Object o)

    - #### getVersion

          public ASN1Integer getVersion()

    - #### getIssuerAndSerialNumber

          public IssuerAndSerialNumber getIssuerAndSerialNumber()

    - #### 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.

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

            EncryptedDigest ::= OCTET STRING

            DigestAlgorithmIdentifier ::= AlgorithmIdentifier

            DigestEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier

      Specified by:
        `toASN1Primitive` in interface `ASN1Encodable`
      Specified by:
        `toASN1Primitive` in class `ASN1Object`
      Returns:
        a primitive representation of this object.