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Class type Netsys_ciphers.cipher_ctx

class type cipher_ctx = object .. end

method padding : padding
The padding scheme of the cipher
method block_constraint : int
The buffers used with encrypt/decrypt must have a length that is a multiple of this number. (In ECB mode this is the block size.)

This value doesn't take padding into account.

method supports_aead : bool
Whether this cipher integrates authentication
method set_iv : string -> unit
Sets the initialization vector (this must be done before starting the encryption or decryption).
method set_header : string -> unit
Sets the header to authenticate for AEAD (this must be done before starting the encryption or decryption).
method encrypt : last:bool -> Netsys_types.memory -> Netsys_types.memory -> int * int
let n_in, n_out = encrypt ~last inbuf outbuf: Encrypts the text in inbuf and writes the result to outbuf. The returned numbers indicate how much data was processed: the first n_in bytes of inbuf are encrypted, and the first n_out bytes of outbuf are filled with ciphertext.

This function can be called several times to encrypt a larger text. last should be set for the last call.

The sizes of inbuf and outbuf must be at least one block in order to produce non-zero (n_in,n_out). (For `CTS only: two blocks.)

method decrypt : last:bool -> Netsys_types.memory -> Netsys_types.memory -> int * int
let n_in, n_out = decrypt ~last inbuf outbuf: Decrypts the text in inbuf and writes the result to outbuf. The returned numbers indicate how much data was processed: the first n_in bytes of inbuf are decrypted, and the first n_out bytes of outbuf are filled with plaintext.

This function can be called several times to decrypt a larger text. last should be set for the last call.

The sizes of inbuf and outbuf must be at least one block in order to produce non-zero (n_in,n_out). (For `CTS only: two blocks.)

On error, the method fails.

method encrypt_string : string -> string
Encrypts this string as a whole
method decrypt_string : string -> string
Decrypts this string as a whole
method mac : unit -> string
Returns the MAC for AEAD ciphers. Can first be called after the encryption/decryption is complete. This function fails for non-AEAD ciphers.
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