Module ghash 

Portable (software) implementation of GHASH field multiplication.

Structs

GhashMulX

Square strategy wrapper for the software GHASH implementation.

GhashSoftMul

GhashWideMul

Widening-multiply wrapper for the portable GHASH packing.

WideGhashProduct

An unreduced GHASH product, stored as the four 64-bit limbs (v0, v1, v2, v3) of the 256-bit schoolbook product. Values of this type can be summed by XOR and reduced once at the end via reduce.

Constants

POLY

The reduction polynomial X^128 + X^7 + X^2 + X + 1, with its X^128 term left implicit.

Functions

ghash_mul

Multiply two GHASH field elements using software implementation.

ghash_mul_x

Scales one GHASH element by X, over u128. The scalar reference.

ghash_square

ghash_wide_mul

Widening multiply: the schoolbook polynomial product of two GHASH field elements, without the modular reduction. The unreduced result can be accumulated by XOR and reduced once at the end via WideGhashProduct::reduce.