Example usage for org.bouncycastle.tsp TimeStampToken toCMSSignedData

List of usage examples for org.bouncycastle.tsp TimeStampToken toCMSSignedData

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Introduction

In this page you can find the example usage for org.bouncycastle.tsp TimeStampToken toCMSSignedData.

Prototype

public CMSSignedData toCMSSignedData()

Source Link

Document

Return the underlying CMSSignedData object.

Usage

From source file:org.votingsystem.signature.util.CMSUtils.java

License:Open Source License

public static byte[] getDigestToken(TimeStampToken timeStampToken) {
    if (timeStampToken == null)
        return null;
    CMSSignedData tokenCMSSignedData = timeStampToken.toCMSSignedData();
    Collection signers = tokenCMSSignedData.getSignerInfos().getSigners();
    SignerInformation tsaSignerInfo = (SignerInformation) signers.iterator().next();

    AttributeTable signedAttrTable = tsaSignerInfo.getSignedAttributes();
    ASN1EncodableVector v = signedAttrTable.getAll(CMSAttributes.messageDigest);
    Attribute t = (Attribute) v.get(0);
    ASN1Set attrValues = t.getAttrValues();
    DERObject validMessageDigest = attrValues.getObjectAt(0).getDERObject();

    ASN1OctetString signedMessageDigest = (ASN1OctetString) validMessageDigest;
    byte[] digestToken = signedMessageDigest.getOctets();
    //String digestTokenStr = new String(Base64.encode(digestToken));
    return digestToken;
}