cryptoapi

OK-- thanks to Mike , I was able to get Wincrypt to generate a Diffie-Hellman keypair. I figured out out to export the public key, and how to import the other party's public key. According to the docs, upon import of the other party's public key, the shared secret has been computed. Great. I now need to get ahold of that shared secret, but I don't think its possible. Simply calling CryptExportKey with a type of PLAINTEXTKEYBLOB fails unless I call CryptSetKeyParam to change the algorithm id from CALG_AGREEDKEY_ANY to something... else. But I don't want something else, I want the shared secret.

I'm struggling with a port of a couple of security libraries to the Windows Phone 8 and Windows Store 8 platform. I need a function which provides random numbers. Win32 has CryptGenRandom and even RtlGenRandom . Windows Store 10 and Universal Windows has BCryptGenRandom . However, there's a hole for Windows Phone 8 and Windows Store 8 because CryptoAPI is not available, and CNG is only available on Windows 10 and Universal Windows. The MSDN docs say BCryptGenRandom is available for "Windows Store", but they don't say its Windows Store 10 and UWP ( thanks CW ). The libraries are unmanaged C/C++

I have a generated RSA key pair stored as PRIVATEKEYBLOB and PUBLICKEYBLOB, and I need to be able to convert these keys to DER or PEM formats so I could use it in PHP or Python. I figured out that I could use CryptEncodeObject function to convert my PRIVATEKEYBLOB to DER. In order to do that I need to use PKCS_RSA_PRIVATE_KEY encoding flag. But I couldn't find any clue on how to convert PUBLICKEYBLOB to DER. Here is my code for PRIVATEKEYBLOB convertion: LPCSTR type = PKCS_RSA_PRIVATE_KEY; DWORD encd = X509_ASN_ENCODING | PKCS_7_ASN_ENCODING; DWORD dlen = 0; if(!CryptEncodeObject(encd, type,

As in the title, I am looking for the difference in the cryptopp library between this declaration: CBC_Mode<AES>::Decryption cbcDecryption.SetKeyWithIV(key, AES::DEFAULT_KEYLENGTH, iv); and this one: AES::Decryption aesDecryption(key, AES::DEFAULT_KEYLENGTH); CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, iv ); Moreover, I can't understand why with this: AES::Decryption aesDecryption(key, AES::DEFAULT_KEYLENGTH); CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, iv ); StreamTransformationFilter stfDecryptor( cbcDecryption, new StringSink( recoveredtext ) );

I am creating an SSL connection using OpenSSL API. As we know in a SSL handshake, series of Certificate Authentication occurs for Server or Client. Now for client certificate authentication, the client's certificate and associated private key are stored in Windows Certificate Store . This certificate with private key is imported into the store after combining them into a pfx format and then that pfx file is imported to the windows Cert store. Now while importing this pfx file using mmc snap-in it asks whether we want to make the private key exportable or not. Now OpenSSL comes into picture for

I generated X509 certificate with private key using makecert utility makecert -n "CN=RootCATest" -r -sv RootCATest.pvk RootCATest.cer makecert -sk MyKeyName -iv RootCATest.pvk -n "CN=tempCert" -ic RootCATest.cer -sr currentuser -ss my -sky signature —pe Then I converted RootCATest.pvk to RootCATest.pem with OpenSSL. And I extracted public key: pubRootCATest.pem I have small file called 'msg'. And I sign this file using SHA1. openssl dgst -sha1 -sign c:\RootCATest.pem -out c:\openssl c:\msg Then I want to obtain the same digital signature using MS CryptoAPI. Here is my code (Note: this is the

I'm trying to find Java (native or BouncyCastle provider) implementation for generating a RSA private key in PKCS#1 using given params {e,n,d}. There is paper by Dan Boneh that describes an algorithm for doing so. The solution is available in PyCrypto (Python), as well as there is a standalone utility posted by Mounir IDRASSI that converts RSA keys between the SFM format (n,e,d) and CRT format (p,q,dp,dq,u), and the other way around. However I was not able to find anything ready to use for Java. Update: I found such implementation at https://github.com/martinpaljak/RSAKeyConverter/blob/master