namespace CryptoFile
+open System
+open System.IO
+open System.Security.Cryptography
+
// Some cryptography primitives specific to CryptoFile.
module internal Crypto =
- open System
- open System.IO
- open System.Security.Cryptography
-
type Data = byte[]
let rsaKeySize = 2048
/// Returns an encrypted output stream.
let encryptAES (key: byte[]) (iv: byte[]) (outputStream: Stream) : CryptoStream =
assert (key.Length = 32 && iv.Length = 16)
- use aes = new AesManaged ()
+ use aes = new AesCryptoServiceProvider () // Default mode is CBC.
aes.KeySize <- 256
let encryptor = aes.CreateEncryptor (key, iv)
new CryptoStream (outputStream, encryptor, CryptoStreamMode.Write)
/// Returns a decrypted input stream.
let decryptAES (key: byte[]) (iv: byte[]) (inputStream: Stream) : CryptoStream =
assert (key.Length = 32 && iv.Length = 16)
- use aes = new AesManaged ()
+ use aes = new AesCryptoServiceProvider ()
aes.KeySize <- 256
let decryptor = aes.CreateDecryptor (key, iv)
new CryptoStream (inputStream, decryptor, CryptoStreamMode.Read)
let HMACStream (key: byte[]) (outputStream: Stream) : Stream * HMACSHA256 =
assert (key.Length = 32)
let hmac = new HMACSHA256 (key)
- new CryptoStream (outputStream, hmac, CryptoStreamMode.Write) :> Stream, hmac
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+ new CryptoStream (outputStream, hmac, CryptoStreamMode.Write) :> Stream, hmac
+
+ let ComputeHMAC (key: byte[]) (inputStream: Stream) : byte[] =
+ assert (key.Length = 32)
+ let hmac = new HMACSHA256 (key)
+ hmac.ComputeHash inputStream
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