[英]How to Create Digital Signature and Verify it in C# using PKCS 7 and SHA algorithm
我正在嘗試對xml文檔進行數字簽名,並使用公共密鑰和簽名的文檔來驗證原始xml文件的簽名。 我有一個Java代碼供參考。 我需要將Java代碼轉換為C#,而我擁有這樣的Java代碼:
certList = new ArrayList<X509Certificate>();
certList.add(signerCert);
certStore = new JcaCertStore(certList);
signedDataGenerator = new CMSSignedDataGenerator();
ContentSigner sha2Signer = new JcaContentSignerBuilder("SHA512with" + privateKey.getAlgorithm()).build(privateKey);
ignedDataGenerator.addSignerInfoGenerator(new JcaSignerInfoGeneratorBuilder(new JcaDigestCalculatorProviderBuilder().build()).setDirectSignature(true).build(sha2Signer, signerCert));
signedDataGenerator.addCertificates(certStore);
CMSSignedData sigData = signedDataGenerator.generate(new CMSProcessableFile(inputXmlFile), false);
signedBytes = sigData.getEncoded();
我已經將Java代碼轉換為C#,如下所示:
X509Store my = new X509Store(StoreName.My, StoreLocation.LocalMachine);
my.Open(OpenFlags.ReadOnly);
// Find the certificate we’ll use to sign
RSACryptoServiceProvider csp = null;
foreach (X509Certificate2 cert in my.Certificates)
{
if (cert.Subject.Contains(certSubject))
{
// We found it.
// Get its associated CSP and private key
csp = (RSACryptoServiceProvider)cert.PrivateKey;
}
}
if (csp == null)
{
throw new Exception("oppose no valid application was found");
}
// Hash the data
SHA512Managed sha1 = new SHA512Managed();
UnicodeEncoding encoding = new UnicodeEncoding();
byte[] data = encoding.GetBytes(text);
byte[] hash = sha1.ComputeHash(data);
// Sign the hash
return csp.SignHash(hash, CryptoConfig.MapNameToOID("SHA1"));
自兩天以來,我一直在嘗試對其進行轉換,它正在生成符號字節數組,但無法進行驗證。 在驗證它引發嚴重的hash \\ r \\ n錯誤時,我將非常感謝您的協助。 我知道我在將Java代碼轉換為C#時出錯了。 我可以驗證代碼,但無法對文檔簽名
我已經使用System.Security.Cryptography.Pkcs庫生成了簽名,就像這樣
public static byte[] Sign(byte[] data, X509Certificate2 certificate)
{
if (data == null)
throw new ArgumentNullException("data");
if (certificate == null)
throw new ArgumentNullException("certificate");
// setup the data to sign
ContentInfo content = new ContentInfo(data);
SignedCms signedCms = new SignedCms(content, false);
CmsSigner signer = new CmsSigner(SubjectIdentifierType.IssuerAndSerialNumber, certificate);
// create the signature
signedCms.ComputeSignature(signer);
return signedCms.Encode();
}
並像這樣驗證簽名
private static bool VerifySignatures(FileInfo contentFile, Stream signedDataStream)
{
CmsProcessable signedContent = null;
CmsSignedData cmsSignedData = null;
Org.BouncyCastle.X509.Store.IX509Store store = null;
ICollection signers = null;
bool verifiedStatus = false;
try
{
//Org.BouncyCastle.Security.addProvider(new BouncyCastleProvider());
signedContent = new CmsProcessableFile(contentFile);
cmsSignedData = new CmsSignedData(signedContent, signedDataStream);
store = cmsSignedData.GetCertificates("Collection");//.getCertificates();
IX509Store certStore = cmsSignedData.GetCertificates("Collection");
signers = cmsSignedData.GetSignerInfos().GetSigners();
foreach (var item in signers)
{
SignerInformation signer = (SignerInformation)item;
var certCollection = certStore.GetMatches(signer.SignerID);
IEnumerator iter = certCollection.GetEnumerator();
iter.MoveNext();
var cert = (Org.BouncyCastle.X509.X509Certificate)iter.Current;
verifiedStatus = signer.Verify(cert.GetPublicKey());
}
}
catch (Exception e)
{
throw e;
}
return verifiedStatus;
}
它為我工作
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