Sha2RoundCols

openvm_sha2_air

Struct Sha2RoundCols 

Source 
#[repr(C)]
pub struct Sha2RoundCols<T, const WORD_BITS: usize, const WORD_U8S: usize, const WORD_U16S: usize, const ROUNDS_PER_ROW: usize, const ROUNDS_PER_ROW_MINUS_ONE: usize, const ROW_VAR_CNT: usize> {
    pub flags: Sha2FlagsCols<T, ROW_VAR_CNT>,
    pub work_vars: Sha2WorkVarsCols<T, WORD_BITS, ROUNDS_PER_ROW, WORD_U16S>,
    pub schedule_helper: Sha2MessageHelperCols<T, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE>,
    pub message_schedule: Sha2MessageScheduleCols<T, WORD_BITS, ROUNDS_PER_ROW, WORD_U8S>,
}
Expand description

In each SHA block:

  • First C::ROUND_ROWS rows use Sha2RoundCols
  • Final row uses Sha2DigestCols

For soundness, the AIR enforces that the trace ends in padding rows after the last digest row. Honest traces already satisfy this because the unpadded height is a multiple of 17 (SHA-256) or 21 (SHA-512), and thus not a power of 2.

Sha2RoundCols and Sha2DigestCols share the same first 3 fields:

  • flags
  • work_vars/hash (same type, different name)
  • schedule_helper

This design allows for:

  1. Common constraints to work on either struct type by accessing these shared fields
  2. Specific constraints to use the appropriate struct, with flags helping to do conditional constraints

Note that the Sha2WorkVarsCols field is used for different purposes in the two structs.

Fields§

§flags: Sha2FlagsCols<T, ROW_VAR_CNT>§work_vars: Sha2WorkVarsCols<T, WORD_BITS, ROUNDS_PER_ROW, WORD_U16S>§schedule_helper: Sha2MessageHelperCols<T, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE>§message_schedule: Sha2MessageScheduleCols<T, WORD_BITS, ROUNDS_PER_ROW, WORD_U8S>

Trait Implementations§

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impl<T: Clone, const WORD_BITS: usize, const WORD_U8S: usize, const WORD_U16S: usize, const ROUNDS_PER_ROW: usize, const ROUNDS_PER_ROW_MINUS_ONE: usize, const ROW_VAR_CNT: usize> Clone for Sha2RoundCols<T, WORD_BITS, WORD_U8S, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE, ROW_VAR_CNT>

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fn clone( &self, ) -> Sha2RoundCols<T, WORD_BITS, WORD_U8S, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE, ROW_VAR_CNT>

Returns a duplicate of the value. Read more
1.0.0 · Source§

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

Performs copy-assignment from source. Read more
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impl<T: Debug, const WORD_BITS: usize, const WORD_U8S: usize, const WORD_U16S: usize, const ROUNDS_PER_ROW: usize, const ROUNDS_PER_ROW_MINUS_ONE: usize, const ROW_VAR_CNT: usize> Debug for Sha2RoundCols<T, WORD_BITS, WORD_U8S, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE, ROW_VAR_CNT>

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

Formats the value using the given formatter. Read more
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impl<T: Copy, const WORD_BITS: usize, const WORD_U8S: usize, const WORD_U16S: usize, const ROUNDS_PER_ROW: usize, const ROUNDS_PER_ROW_MINUS_ONE: usize, const ROW_VAR_CNT: usize> Copy for Sha2RoundCols<T, WORD_BITS, WORD_U8S, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE, ROW_VAR_CNT>

Auto Trait Implementations§

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impl<T, const WORD_BITS: usize, const WORD_U8S: usize, const WORD_U16S: usize, const ROUNDS_PER_ROW: usize, const ROUNDS_PER_ROW_MINUS_ONE: usize, const ROW_VAR_CNT: usize> Freeze for Sha2RoundCols<T, WORD_BITS, WORD_U8S, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE, ROW_VAR_CNT>
where T: Freeze,

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impl<T, const WORD_BITS: usize, const WORD_U8S: usize, const WORD_U16S: usize, const ROUNDS_PER_ROW: usize, const ROUNDS_PER_ROW_MINUS_ONE: usize, const ROW_VAR_CNT: usize> RefUnwindSafe for Sha2RoundCols<T, WORD_BITS, WORD_U8S, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE, ROW_VAR_CNT>
where T: RefUnwindSafe,

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impl<T, const WORD_BITS: usize, const WORD_U8S: usize, const WORD_U16S: usize, const ROUNDS_PER_ROW: usize, const ROUNDS_PER_ROW_MINUS_ONE: usize, const ROW_VAR_CNT: usize> Send for Sha2RoundCols<T, WORD_BITS, WORD_U8S, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE, ROW_VAR_CNT>
where T: Send,

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impl<T, const WORD_BITS: usize, const WORD_U8S: usize, const WORD_U16S: usize, const ROUNDS_PER_ROW: usize, const ROUNDS_PER_ROW_MINUS_ONE: usize, const ROW_VAR_CNT: usize> Sync for Sha2RoundCols<T, WORD_BITS, WORD_U8S, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE, ROW_VAR_CNT>
where T: Sync,

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impl<T, const WORD_BITS: usize, const WORD_U8S: usize, const WORD_U16S: usize, const ROUNDS_PER_ROW: usize, const ROUNDS_PER_ROW_MINUS_ONE: usize, const ROW_VAR_CNT: usize> Unpin for Sha2RoundCols<T, WORD_BITS, WORD_U8S, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE, ROW_VAR_CNT>
where T: Unpin,

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impl<T, const WORD_BITS: usize, const WORD_U8S: usize, const WORD_U16S: usize, const ROUNDS_PER_ROW: usize, const ROUNDS_PER_ROW_MINUS_ONE: usize, const ROW_VAR_CNT: usize> UnwindSafe for Sha2RoundCols<T, WORD_BITS, WORD_U8S, WORD_U16S, ROUNDS_PER_ROW, ROUNDS_PER_ROW_MINUS_ONE, ROW_VAR_CNT>
where T: UnwindSafe,

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