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AeadEncryptor

mssql_auth::aead

Struct AeadEncryptor 

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pub struct AeadEncryptor { /* private fields */ }
Expand description

AEAD_AES_256_CBC_HMAC_SHA256 encryption context.

Provides encryption and decryption operations for Always Encrypted data.

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impl AeadEncryptor

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pub fn new(cek: &[u8]) -> Result<Self, EncryptionError>

Create a new encryptor from a Column Encryption Key.

§Arguments
  • cek - The Column Encryption Key (32 bytes)
§Errors

Returns an error if key derivation fails.

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pub fn encrypt( &self, plaintext: &[u8], encryption_type: EncryptionType, ) -> Result<Vec<u8>, EncryptionError>

Encrypt plaintext using AEAD_AES_256_CBC_HMAC_SHA256.

§Arguments
  • plaintext - The data to encrypt
  • encryption_type - Randomized or Deterministic encryption
§Returns

The ciphertext in the format: version_byte + MAC + IV + aes_ciphertext

§Errors

Returns an error if encryption fails.

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pub fn decrypt(&self, ciphertext: &[u8]) -> Result<Vec<u8>, EncryptionError>

Decrypt ciphertext using AEAD_AES_256_CBC_HMAC_SHA256.

§Arguments
  • ciphertext - The encrypted data (version + MAC + IV + aes_ciphertext)
§Returns

The decrypted plaintext.

§Errors

Returns an error if:

  • Ciphertext is too short
  • Version byte is invalid
  • MAC verification fails (data may be tampered)
  • Decryption fails

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