8.2 signerInfo 類型

signerInfo類型結構定義如下：

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

結構中各項含義見表3：