C# 如何在时间戳令牌(Bouncy Castle)中获得签名
从RFC3852(和RFC3161)中,我了解到签名值存储为TimestampToken的SignerInfo类型的属性(这是一种签名数据内容类型)C# 如何在时间戳令牌(Bouncy Castle)中获得签名,c#,bouncycastle,C#,Bouncycastle,从RFC3852(和RFC3161)中,我了解到签名值存储为TimestampToken的SignerInfo类型的属性(这是一种签名数据内容类型) 如何从Bouncy Castle的TimeStampToken实例(在C#)中获取该签名值?您可以将类与助手方法一起使用: public static class TimeStampTokenHelper { public static IEnumerable<SignedData> GetTimeStampTokensAsSi
如何从Bouncy Castle的TimeStampToken实例(在C#)中获取该签名值?您可以将类与助手方法一起使用:
public static class TimeStampTokenHelper
{
public static IEnumerable<SignedData> GetTimeStampTokensAsSignedData(byte[] input)
{
var cmsInputStream = new Asn1InputStream(input);
var asn1Object = cmsInputStream.ReadObject();
Assert.IsNotNull(asn1Object);
var rootSequence = Asn1Sequence.GetInstance(asn1Object);
var signedData = GetSignedData(rootSequence);
return GetTimeStampTokensFromSignedData(signedData);
}
private static SignedData GetSignedData(Asn1Sequence sequence)
{
var rootContent = ContentInfo.GetInstance(sequence);
Assert.That(rootContent.ContentType.Id, Is.EqualTo("1.2.840.113549.1.7.2")); // signedData
var signedData = SignedData.GetInstance(rootContent.Content);
return signedData;
}
private static IEnumerable<SignedData> GetTimeStampTokensFromSignedData(SignedData signedData)
{
return GetTimeStampTokensFromSignerInfos(signedData.SignerInfos);
}
private static IEnumerable<SignedData> GetTimeStampTokensFromSignerInfos(Asn1Set signerInfos)
{
var timestampTokens = signerInfos
.OfType<Asn1Sequence>()
.SelectMany(GetTimeStampTokensFromSignerInfo);
return timestampTokens;
}
private static IEnumerable<SignedData> GetTimeStampTokensFromSignerInfo(Asn1Sequence signerInfoSequence)
{
var signerInfo = SignerInfo.GetInstance(signerInfoSequence);
var result = signerInfo.UnauthenticatedAttributes.ToArray()
.Select(Asn1Sequence.GetInstance)
.Where(x => ((DerObjectIdentifier)x.GetObjectAt(0)).Id == "1.2.840.113549.1.9.16.2.14")
.Select(x => GetSignedData(Asn1Sequence.GetInstance(Asn1Set.GetInstance(x.GetObjectAt(1)).GetObjectAt(0))));
return result;
}
作为最后的提示:
- 您可以使用来深入了解学员签名的结构
- 您可以使用
方法转储BouncyCastle的ASN.1对象的字符串表示形式Org.BouncyCastle.Asn1.Utilities.Asn1Dump.DumpAsString
希望这有帮助。我可以通过以下方式获得签名:
CmsSignedData tsTokenCms = timestampToken.ToCmsSignedData();
SignerInformationStore signerInfoStore = tsTokenCms.GetSignerInfos();
SignerInformation signerInfo = signerInfoStore.GetFirstSigner(timestampToken.SignerID);
byte[] signatureBytes = signerInfo.GetSignature();
string signatureString = BitConverter.ToString(signatureBytes);
Console.WriteLine("Signature is: " + signatureString);
CmsSignedData tsTokenCms = timestampToken.ToCmsSignedData();
SignerInformationStore signerInfoStore = tsTokenCms.GetSignerInfos();
SignerInformation signerInfo = signerInfoStore.GetFirstSigner(timestampToken.SignerID);
byte[] signatureBytes = signerInfo.GetSignature();
string signatureString = BitConverter.ToString(signatureBytes);
Console.WriteLine("Signature is: " + signatureString);