Key Vault (1 / 13): Your organization is developing a secure application that involves handling confidential data. You have been tasked with the following requirements:
- Establish a connection to a remote vault service to manage sensitive keys and secrets.
- Retrieve a designated secret from the vault.
- Obtain a specific cryptographic key from the vault.
- Use the obtained key to perform the following cryptographic operations:
- Add the secret value to a given plaintext message, then encrypt it using an asymmetric encryption algorithm.
- Decrypt the resulting ciphertext using the same algorithm.
Provide the code to fulfill these requirements, adhering to industry standards for secure communication and cryptographic practices.
var vaultUrl = "https://<your-key-vault-name>.vault.azure.net/";
var credential = new DefaultAzureCredential();
var secretKeyName = "<YourSecretName>";
var plaintext = "<To be encrypted>";
var encryptionAlgorithm = EncryptionAlgorithm.RsaOaep;
// Code here
Answer:
var vaultUrl = "https://<your-key-vault-name>.vault.azure.net/";
var credential = new DefaultAzureCredential();
var secretKeyName = "<YourSecretName>";
var plaintext = "<To be encrypted>";
var encryptionAlgorithm = EncryptionAlgorithm.RsaOaep;
var client = new KeyClient(vaultUri: new Uri(vaultUrl), credential: credential);
KeyVaultSecret secret = await client.GetSecretAsync(secretKeyName);
string secretValue = secret.Value;
var keyResponse = await client.GetKeyAsync(secretKeyName);
KeyVaultKey key = keyResponse.Value;
CryptographyClient cryptoClient = client.GetCryptographyClient(key.Name, key.Properties.Version);
EncryptResult encryptResult = cryptoClient.Encrypt(encryptionAlgorithm, Encoding.UTF8.GetBytes(plaintext + secretValue));
DecryptResult decryptResult = cryptoClient.Decrypt(encryptionAlgorithm, encryptResult.Ciphertext);