Trait cmac::Mac

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pub trait Mac: Sized + OutputSizeUser {

Show 13 methods    // Required methods
    fn new(key: &GenericArray<u8, Self::KeySize>) -> Self
       where Self: KeyInit;
    fn new_from_slice(key: &[u8]) -> Result<Self, InvalidLength>
       where Self: KeyInit;
    fn update(&mut self, data: &[u8]);
    fn chain_update(self, data: impl AsRef<[u8]>) -> Self;
    fn finalize(self) -> CtOutput<Self>;
    fn finalize_reset(&mut self) -> CtOutput<Self>
       where Self: FixedOutputReset;
    fn reset(&mut self)
       where Self: Reset;
    fn verify(
        self,
        tag: &GenericArray<u8, Self::OutputSize>,
    ) -> Result<(), MacError>;
    fn verify_reset(
        &mut self,
        tag: &GenericArray<u8, Self::OutputSize>,
    ) -> Result<(), MacError>
       where Self: FixedOutputReset;
    fn verify_slice(self, tag: &[u8]) -> Result<(), MacError>;
    fn verify_slice_reset(&mut self, tag: &[u8]) -> Result<(), MacError>
       where Self: FixedOutputReset;
    fn verify_truncated_left(self, tag: &[u8]) -> Result<(), MacError>;
    fn verify_truncated_right(self, tag: &[u8]) -> Result<(), MacError>;

}
Expand description

Convenience wrapper trait covering functionality of Message Authentication algorithms.

This trait wraps KeyInit, Update, FixedOutput, and MacMarker traits and provides additional convenience methods.

Required Methods§

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fn new(key: &GenericArray<u8, Self::KeySize>) -> Self
where Self: KeyInit,

Create new value from fixed size key.

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fn new_from_slice(key: &[u8]) -> Result<Self, InvalidLength>
where Self: KeyInit,

Create new value from variable size key.

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fn update(&mut self, data: &[u8])

Update state using the provided data.

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fn chain_update(self, data: impl AsRef<[u8]>) -> Self

Process input data in a chained manner.

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fn finalize(self) -> CtOutput<Self>

Obtain the result of a Mac computation as a CtOutput and consume Mac instance.

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fn finalize_reset(&mut self) -> CtOutput<Self>
where Self: FixedOutputReset,

Obtain the result of a Mac computation as a CtOutput and reset Mac instance.

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fn reset(&mut self)
where Self: Reset,

Reset MAC instance to its initial state.

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fn verify( self, tag: &GenericArray<u8, Self::OutputSize>, ) -> Result<(), MacError>

Check if tag/code value is correct for the processed input.

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fn verify_reset( &mut self, tag: &GenericArray<u8, Self::OutputSize>, ) -> Result<(), MacError>
where Self: FixedOutputReset,

Check if tag/code value is correct for the processed input and reset Mac instance.

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fn verify_slice(self, tag: &[u8]) -> Result<(), MacError>

Check truncated tag correctness using all bytes of calculated tag.

Returns Error if tag is not valid or not equal in length to MAC’s output.

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fn verify_slice_reset(&mut self, tag: &[u8]) -> Result<(), MacError>
where Self: FixedOutputReset,

Check truncated tag correctness using all bytes of calculated tag and reset Mac instance.

Returns Error if tag is not valid or not equal in length to MAC’s output.

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fn verify_truncated_left(self, tag: &[u8]) -> Result<(), MacError>

Check truncated tag correctness using left side bytes (i.e. tag[..n]) of calculated tag.

Returns Error if tag is not valid or empty.

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fn verify_truncated_right(self, tag: &[u8]) -> Result<(), MacError>

Check truncated tag correctness using right side bytes (i.e. tag[n..]) of calculated tag.

Returns Error if tag is not valid or empty.

Object Safety§

This trait is not object safe.

Implementors§

source§

impl<T> Mac for T
where T: Update + FixedOutput + MacMarker,