cryptoapi

I'm trying to use the WinCrypt API in C++. My application need to cipher, decipher, sign and verify files, and I know how to do that once I have the correct keys. But my problem is actually that that is NOT the same application which generates those keys. What I have is public and private keys in files in PEM format : -----BEGIN RSA PRIVATE KEY----- [Base64 encoded] -----END RSA PRIVATE KEY----- And : -----BEGIN RSA PUBLIC KEY----- [Base64 encoded] -----END RSA PUBLIC KEY----- After some research, I have found how to import the public key : here and here , using the following methods :

I've written a program which is supposed to save and restore a users certificates using the windows Crypto API. I was under the impression that it was working fine but now a user has complained that the private key that was attached to the certificate is invalid after the cert has been restored. I was saving the certificates using: HCERTSTORE hCertStore = CertOpenStore(CERT_STORE_PROV_PHYSICAL_W, 0, NULL, CERT_SYSTEM_STORE_CURRENT_USER | CERT_STORE_OPEN_EXISTING_FLAG | CERT_STORE_READONLY_FLAG | CERT_STORE_UPDATE_KEYID_FLAG, (PVOID) storeName.c_str()); And then later: if (!CertSaveStore

I have requirement of signing a data using MD5-SHA1 hash (MD5 hash and SHA1 hash of the data are combined and then signed). Primary requirement: MD5-SHA1 hash is provided by OpenSSL in some way that is not exposed. This hash is complete. Now my requirement is to sign this hash using Crypto API without hashing (only signing is required, not hashing again). Why CryptoAPI, not OpenSSL? Because, I am dealing with a certificate with non-exportable private key. Its private key can only be used by CryptoAPI, not by OpenSSL. This scenario is from SSL handshake where send Client verify part (under the

I want to sign file with the SunMSCAPI provider. As public key and signatures needs to be imported using MS Crypto API. Generally generating signatures with SHA1withRSA , ends up with big-endian to little-endian (byte order) conversion. //generate keystore with java keytool $Keytool -genkey -alias tsign -keystore c:\test\tsignjks.p12 - keyalg rsa -storetype pkcs12 In Java application: //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

I've managed to use Sun's MSCAPI provider in my application. The problem I'm having now is that it always pops up a window, asking for a password, even though I've provided it in the code. This is a problem, because I need the cryptography functionality in a webservice. Here's the code I have now: String alias = "Alias to my PK"; char[] pass = "MyPassword".toCharArray(); KeyStore ks = KeyStore.getInstance("Windows-MY"); ks.load(null, pass); Provider p = ks.getProvider(); Signature sig = Signature.getInstance("SHA1withRSA",p); PrivateKey key = (PrivateKey) ks.getKey(alias, pass) sig.initSign

I'm trying to write a simple program to encrypt and decrypt files using the AES algortihm. I haven't problems with encryption, but decryption.. public static void main(String[] args) throws NoSuchAlgorithmException, FileNotFoundException, InvalidKeyException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException { // Инициализация секретных ключей KeyGenerator keyGenS = KeyGenerator.getInstance("AES"); keyGenS.init(128); SecretKey sKey1 = keyGenS.generateKey(); SecretKey sKey2 = keyGenS.generateKey(); // Перевод секретных ключей в строку и запись в файл String key1 =