- 1 year ago
Import public key using Windows C CNG/Crypto API
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To import a public key using the Windows CNG (Cryptography Next Generation) or CryptoAPI, you can follow these general steps:
Load the key into memory:
- Obtain the public key data you want to import. This could be in various formats such as PEM, DER, or other representations.
- Read the key data into memory.
Determine the key format:
- Identify the format of the public key data you have. This will determine the specific API calls you need to make.
- Common formats for public keys include X.509 certificates, RSA public keys, or ECC (Elliptic Curve Cryptography) public keys.
Use the appropriate API calls:
- If you're using CNG, you can use the
NCryptOpenKey
,NCryptImportKey
, orNCryptImportPublicKey
functions to import the key. The specific function to use depends on the key format. - If you're using CryptoAPI, you can use the
CryptImportKey
orCryptImportPublicKeyInfo
functions to import the key. Again, the specific function depends on the key format.
- If you're using CNG, you can use the
Provide necessary parameters:
- When calling the import functions, you'll need to provide additional parameters such as the key format, key blob, length, and other necessary information.
- Refer to the documentation for the specific functions you're using to determine the required parameters and their formats.
Handle error conditions:
- Check the return values of the API calls to handle any errors that might occur during the key import process.
- Use appropriate error handling techniques, such as error codes or exceptions, to ensure proper handling of any failures.
Please note that the specific code required to import a public key using the Windows CNG or CryptoAPI can vary depending on the key format and the details of your use case. It's recommended to consult the official Microsoft documentation and examples for the specific functions and formats you're working with. The documentation provides more detailed information and examples to guide you through the process of importing public keys using these APIs.