数字签名SunMSCAPI提供商和MS Crypto API

Question

我想与SunMSCAPI提供商签署文件.由于需要使用MS Crypto API导入公钥和签名.

通常生成签名SHA1withRSA,最终使用big-endian到little-endian(字节顺序)转换.

//generate keystore with java keytool
$Keytool -genkey -alias tsign -keystore c:\test\tsignjks.p12 - keyalg rsa -storetype  pkcs12

在Java应用程序中:

//for signing and getting keystore, assuming windows certificate is installed
..ks = KeyStore.getInstance("Windows-MY","SunMSCAPI"); 
PrivateKey priv = ks.getKey("tsign",password); 
Signature rsa = Signature.getInstance("SHA1withRSA","SunMSCAPI"); 
rsa.initSign(priv);
.. 
rsa.update(buffer, 0, len);
..
byte[] realSig = rsa.sign();

//for writing public key for ms crypto api or exporting it from windows certificate store
Certificate cert = ks.getCertificate("tsign");
byte[] encodedCert = cert.getEncoded();
FileOutputStream certfos = new FileOutputStream("tsigncer.cer");
certfos.write(encodedCert);

//for writing signatures for ms crypto api
FileOutputStream sigfos = new FileOutputStream(targetPath + "/"
                + signatureName);
sigfos.write(realSig);

我相信SunMSCAPI可以解决我的问题,但我不知道我什么时候导入使用MS加密API公共密钥,它从来没有在导入在第一阶段(除非我改变大端为小端字节顺序)下面是我对加密API代码.

LPCSTR file = "tsigncer.cer";
//LPCSTR file = "omsign.p12";
BOOL crypt_res = FALSE;

HCRYPTPROV crypt_prov_hndl = NULL;
 crypt_res = CryptAcquireContext(&crypt_prov_hndl, NULL, NULL, PROV_RSA_FULL, 0/*CRYPT_NEWKEYSET*/);
//crypt_res = CryptAcquireContext(&crypt_prov_hndl, NULL, NULL, PROV_DSS, CRYPT_VERIFYCONTEXT/*CRYPT_NEWKEYSET*/);

    if (!crypt_res) {
        HRESULT decode_hr = __HRESULT_FROM_WIN32(GetLastError());
        return decode_hr;
    }

    // Load key file
    HANDLE fileHandle = CreateFile(file, // name of the write
                       GENERIC_READ,          // open for writing
                       0,                      // do not share
                       NULL,                   // default security
                       OPEN_EXISTING,             // create new file only
                       FILE_ATTRIBUTE_NORMAL,  // normal file
                       NULL);                  // no attr. template

    if (fileHandle == INVALID_HANDLE_VALUE)
    {
        DWORD d = GetLastError();
        return -1;
    }

    BYTE buffer[2056];
    DWORD fileSize = 0;
    DWORD fileSizeResult = GetFileSize(fileHandle, &fileSize);

    DWORD numBytesRead = 0;
    BOOL fileLoadResult = ReadFile(fileHandle, (PVOID)buffer, fileSizeResult, &numBytesRead, NULL);

    // Import key
    BOOL result = ImportKey(crypt_prov_hndl, (LPBYTE)buffer, numBytesRead);
//result is always false..

Answer 1

如果您使用MSCAPI,则假定您已将密钥添加到Microsoft证书存储区.您可以通过转到"Internet属性">"内容">"证书"来检查密钥是否存在,该证书为您提供了可用的证书列表.如果您的证书不存在,则无法使用.如果它在那里,你需要这个代码:

SunMSCAPI providerMSCAPI = new SunMSCAPI();
Security.addProvider(providerMSCAPI);
KeyStore ks = KeyStore.getInstance("Windows-MY");
ks.load(null, null);

从那以后,代码非常标准.有关更多信息,请参阅我的数字签名书(该书是免费的).

重要补充:我忘了提到64位版本的Java 6中没有SunMSCAPI(我不知道Java 7).您可以通过安装32位版本来解决此问题.