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Questions tagged [cng]

CryptoAPI Next Generation (CNG) is the next version of the Windows CryptoAPI available since Vista. It adds NSA Suite B algoritms (including elliptic-curve cryptography) and is FIPS 140-2 certified.

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CNG Microsoft Smart Card Key Storage Provider AcquireContext

I'm trying to acquire the Microsoft Smart Card Key Storage Provider using: CryptAcquireContext(&hProv, contName ,L"Microsoft Smart Card Key Storage Provider", PROV_RSA_FULL , flags); but, this fails with error: NTE_KEYSET_NOT_DEF (0x80090019) if I…
dominik
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How to create a self-signed Certificate using CLR Security to use with EnvelopedCms?

I am trying to create a self-signed Certificate using the CLR-Security library Security.Cryptography.dll (their homepage: http://clrsecurity.codeplex.com) I am able to create the certificate and even to Encrypt with it, but Decrypt fails with the…
Roman
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Is there a way to view the ECDH Shared Secret generated within microsoft CNG?

I am trying to perform a ECDH key exchange between MS CNG and another device. In order to debug things, I would like to see what shared secret is being generated in CNG so i can compare it with the secret generated by my other device. Anybody know…
Daniel Scire
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Random number and Microsoft CNG

I need to use the Microsoft CNG API to generate secure random numbers for cryptography. Am I supposed to generate all the numbers using this API, or just obtain a seed value for another random generator from it? Any help appreciated! Thanks.
James
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How to export public key with NCryptExportKey into a file

I've created a RSA key with NCryptCreatePersistedKey and then later I want to use the NCryptExportKey to export its public key into a blob then write out into a file (DER or PEM doesnt matter). I've tried with this sample: NCryptExportKey( …
wildfrontier
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Is there a way to log CNG function calls?

I need to log CNG(BCrypt/NCrypt) function calls. I've managed to find the respective channels in Windows Event Log, but they don't provide the complete information - some calls aren't logged, and the function argument values aren't logged. What I…
Макс
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NCryptExportKey fails when trying to export RSA key

I'm trying to create a RSA private key with NCryptCreatePersistedKey and then later to export it into a BLOB with NCryptExportKey, but I don't understand why it fails. This is how I create the private key: if…
wildfrontier
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CNG keyStore, MS Keystorage Provider Key expiration

"Hello, community! I have a couple of questions regarding the Microsoft key store provider. Firstly, does a key stored in the Microsoft key store provider expire automatically? I'm curious to know if there's a predefined expiration mechanism for…
Anup Deshpande
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CngProvider.SetProviderProperty in .NET?

How to set a CNG provider property with .NET? There is a CngKey.SetProperty method, but under the hood it calls SetKeyProperty. How to call SetProviderProperty instead? CngProvider does not seem to have a SetProperty method.
D.R.
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Bcryptdecrypt unable to decrypt data correctly

I have some data that was previously encrtypted with cryptdecrypt APIs. Since it is deprecated I am supposed to move to the latest bcryptdecrypt (CNG)APIs. But with this code I am not able to decrypt the data correctly. I still see junk in…
RituV
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How to duplicate NCRYPT_KEY_HANDLE?

How do I duplicate NCRYPT_KEY_HANDLE? With BCRYPT_KEY_HANDLE one might have used BCryptDuplicateKey() from bcrypt.h but I cannot seem to find a similar function for this data type.
Lipovlan
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Updating from Windows CryptDecrypt() to NCryptDecrypt() returns NTE_INVALID_PARAMETER(0x80090027) or STATUS_UNSUCCESSFUL(0xC0000001)?

Currently updating from Windows CryptDecrypt() [API is deprecated] to NCryptDecrypt() [Cryptography Next Generation]. The minimal sample code below tries to encrypt/decrypt using RSA 1024-bit. Running with Microsoft Visual Studio Professional 2019,…
vengy
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How do I correctly print a ciphertext encrypted by BCryptEncrypt?

I am trying to use BCryptEncrypt to encrypt some basic plain text and I would like to save it in a Notepad; but I want to actually print and see the encrypted text in the console. What is the correct format for wprintf? Here's part of my code: //…
Sergio Calderon
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BCryptDecrypt failes with STATUS_INVALID_PARAMETER

I am trying to RSA encrypt an buffer using Windows api cng's Bcrypt library. But my first call to BCryptDecrypt failes with STATUS_INVALID_PARAMETER... status = BCryptDecrypt( hKey, pbEncryptedBuffer, cbEncryptedBuffer, …
woldgrep
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Converting CNG RSA BLOB to openssl BLOB?

I want to make application windows exchange pair key and use it in openssl php , how I can change BCRYPT_RSAKEY_BLOB to openSSL ? I used but RSA SEQUENCE still deffrent : PBYTE pbASN; // Length of the ASN.1 encoded key DWORD cbASN; // Generate the…
dree3
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