Struct EncryptionDict 

pub struct EncryptionDict {
    pub o_value: Vec<u8>,
    pub u_value: Vec<u8>,
    pub oe_value: Option<Vec<u8>>,
    pub ue_value: Option<Vec<u8>>,
    pub perms_value: Option<Vec<u8>>,
    pub p_value: i32,
    pub encryption_key: Vec<u8>,
    pub key_length: u32,
    pub revision: u32,
    pub version: u32,
    pub algorithm: EncryptionAlgorithm,
}

Computed encryption dictionary and keys

Fields

o_value: Vec<u8>

The /O value (owner password hash, 32 bytes for RC4; 48 bytes for AES-256)

u_value: Vec<u8>

The /U value (user password hash, 32 bytes for RC4; 48 bytes for AES-256)

oe_value: Option<Vec<u8>>

The /OE value (owner key, 32 bytes; AES-256 only)

ue_value: Option<Vec<u8>>

The /UE value (user key, 32 bytes; AES-256 only)

perms_value: Option<Vec<u8>>

The /Perms value (encrypted permissions, 16 bytes; AES-256 only)

p_value: i32

The /P value (permission flags)

encryption_key: Vec<u8>

The encryption key (for encrypting streams/strings)

key_length: u32

Key length in bits

revision: u32

Revision number (2 for RC4-40, 3 for RC4-128, 6 for AES-256)

version: u32

Version number (1 for RC4-40, 2 for RC4-128, 5 for AES-256)

algorithm: EncryptionAlgorithm

Encryption algorithm

Implementations

impl EncryptionDict

pub fn encrypt_data(&self, data: &[u8], obj_num: u32, gen_num: u16) -> Vec<u8>

Encrypt a PDF stream or string for a specific object

For RC4: derives per-object key (Algorithm 3.1) then RC4-encrypts. For AES-256: encrypts with AES-256-CBC, prepending a 16-byte IV.

pub fn to_pdf_dict(&self, encrypt_obj_id: usize) -> String

Generate the /Encrypt dictionary PDF object content

pub fn aes128_encrypt_block(&self, data: &[u8; 16]) -> [u8; 16]

Encrypt data using AES-128-ECB for a single block

Used for encrypting individual 16-byte blocks when needed.

pub fn encrypt_aes256(data: &[u8], key: &[u8]) -> Vec<u8>

Encrypt data using AES-256-CBC with a random IV prepended to the output

For AES-256 encryption of PDF streams and strings. Returns IV (16 bytes) || ciphertext.

Trait Implementations

impl Clone for EncryptionDict

fn clone(&self) -> EncryptionDict

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for EncryptionDict

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.