Function decrypt_with_key 

pub fn decrypt_with_key(
    key_id: &str,
    ciphertext: &str,
    associated_data: Option<&[u8]>,
) -> Result<String>

Decrypt text using a stored key from the key store

Arguments

• key_id - Identifier of the key to use for decryption
• ciphertext - Base64-encoded encrypted text to decrypt
• associated_data - Optional associated data (must match encryption)

Returns

Decrypted plaintext as a string

Errors

Returns an error if the key store is not initialized, the key is not found, or decryption fails