Struct MacCtx 

pub struct MacCtx(/* private fields */);

A context object used to perform MAC operations.

Implementations

impl MacCtx

pub fn new(mac: Mac) -> Result<Self, ErrorStack>

Creates a new context.

This corresponds to EVP_MAC_CTX_new.

pub fn init_ex( &mut self, key: Option<&[u8]>, md: &CStr, ) -> Result<(), ErrorStack>

Set key and digest

pub fn mac_size(&self) -> usize

Returns the MAC output size for the given context.

This corresponds to EVP_MAC_CTX_get_mac_size.

pub fn block_size(&self) -> usize

Returns the MAC block size for the given context.

Not all MAC algorithms support this.

This corresponds to EVP_MAC_CTX_get_block_size.

pub fn mac_update(&mut self, data: &[u8]) -> Result<(), ErrorStack>

Add data bytes to the MAC input.

This corresponds to EVP_MAC_update.

pub fn mac_final(&mut self, out: Option<&mut [u8]>) -> Result<usize, ErrorStack>

Do the final computation and stores the result.

If out is set to None, an upper bound on the number of bytes required for the output buffer will be returned.

This corresponds to EVP_MAC_final.

pub fn mac_final_to_vec( &mut self, out: &mut Vec<u8>, ) -> Result<usize, ErrorStack>

Like Self::mac_final but appends the result to a Vec.

Trait Implementations

impl AsRef<MacCtxRef> for MacCtx

fn as_ref(&self) -> &MacCtxRef

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<MacCtxRef> for MacCtx

fn borrow(&self) -> &MacCtxRef

Immutably borrows from an owned value.

impl Clone for MacCtx

fn clone(&self) -> MacCtx

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Deref for MacCtx

type Target = MacCtxRef

The resulting type after dereferencing.

fn deref(&self) -> &MacCtxRef

Dereferences the value.

impl DerefMut for MacCtx

fn deref_mut(&mut self) -> &mut MacCtxRef

Mutably dereferences the value.

impl Drop for MacCtx

fn drop(&mut self)

Executes the destructor for this type.

impl ForeignType for MacCtx

type CType = EVP_MAC_CTX

The raw C type.

type Ref = MacCtxRef

The type representing a reference to this type.

unsafe fn from_ptr(ptr: *mut EVP_MAC_CTX) -> MacCtx

Constructs an instance of this type from its raw type.

fn as_ptr(&self) -> *mut EVP_MAC_CTX

Returns a raw pointer to the wrapped value.

impl Send for MacCtx

impl Sync for MacCtx