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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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CryptoAPI CNG and CMS functionality

I've got a question regarding Microsoft CNG which substitutes Crypto API. Since I have a project/assignment where I need to use CMS/PKCS#7 with RSA-OAEP encryption and RSASSA-PSS signatures. But I am confused about whether CNG (not the legacy…
slb20
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In minidriver, is the value of hSCardCtx and hScard in PCARD_DATA can be changed after called CardAcquireContext?

I am working on a project related minidriver to perform operations in smart card. I have register smartcard in registry with proper ATR and minidriver information. Now I am trying to generate keypair using CNG -> minidriver -> smart card. To achieve…
iOS-Developer84
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Using my own crypto provider for Windows without signing it

I am required to make my own realization of the crypto algorithm and make it available for Windows applications.I made a crypto provider library for working through CryptoAPI under the instruction (in the article Service Provider Cookbook), except…
Robert
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AesCng persisted key export/import: Import fails with CryptographicException: The supplied handle is invalid

I need to securely persist AES key(s) to be used by the .NET AesCng algorithm. The idea is to use the CngKey class to persist the key(s) and leverage its export/import functionality to maintain the same key(s) across multiple servers. I can create…
L_E_R
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System.Security.Cryptography.CryptographicException: The requested operation is not supported. windows server 2012

I'm tiring to generate the jwt token for calling apns. here is my code: var header = new Dictionary() { { "kid" , keyID } }; var payload = new Dictionary() { { "iss", teamID }, …
Mohammad
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c# JWT using ES256, load privateKey into CngKey to be validated in talkdesk (jose-jwt)

I am attempting to generate a JWT using a ES256 algorithm to be validated by talk desk (documentation: https://docs.talkdesk.com/docs/using-a-signed-jwt). BUT I have an ADO.net project so I can't use any of the frameworks they sugested, so I thought…
André Moura
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optimization options and usage of windows dll calls

I am building a dll for windows, using a Makefile, using cl.exe. I am using VS2015.. this dll uses CNG (bcrypt) for encryption operations, and bcryptr is loaded dynamically using loadlibrary call. When i build with /Od option to disable…
scirdan
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STATUS_INVALID_PARAMETER error import diffie hellman public key using BCryptImportKeyPair

I am trying to add a public key into diffie Hellman implementation of Bcrypt. example suggested to create and export a public key. In my case I already got the public key from the client. I am trying to use that public key to generate shared…
Prakash N
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Can Microsoft Cryptographic API allow creation of ECDSA keys from a stream of bytes?

So I am pondering which cryptographic C++ library to use (I already figured out how to do equivalent in C#) for the verification of a licence file signed hash. Reading the Microsoft documentation for CNG it seems that it is not possible to…
S Meaden
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EC private key to CngKey in C#

I need to convert a EC private key generated by BouncyCastle to a CngKey in C#. Ultimately, I'm trying to create a PKCS12 that can be imported into the Windows Key Store and am following the information and code example found here. The EC key pair…
hyongsop
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"Keyset does not exist" trying to create a CngKeyStore

Trying to call CngKeyStore.Open() with a non-admin account, and was initially getting an "Access denied" exception. After granting the user account access to the c:\programdata\microsoft\crypto\keys folder, am now getting the above "Keyset does not…
gooram
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.NET wrapper for DPAPI-NG and user group access configuration

I have a number of workstations which are part of my domain, each running some .NET application. One central server stores secrets which I would like to be encrypted by a key which is accessible to all users of the system which have the appropriate…
NLuburić
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C++ Importing RSA public keys from modulus and exponent with CNG

I'm trying to use CNG to encrypt some data with a public key that is given as a parameter. When calling NCryptImportKey function, I get a NTE_BAD_DATA error which isn't listed in the msdn page. My code: #include #include…
Orr Goldman
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Suppress strong key protection UI

Is it possible to use Microsofts cryptography function CryptUIWizImport without getting a UI to enter the password during sign as well as during importing the pfx file in the local system? How? Details: I have developed an application to sign the…
Bala MIB
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AES-CBC encrypted output in CNG is not matching with online tools

I am new to CNG. I am playing with the basic program from msdn site. I have modified the input plain string and testing the output using other websites that provides the aes cbc encrypted output. Unfortunately only first half matches and the next…
ABCDEFG
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