Switch edwards25519 operations to divstep-based modular inverse

This replaces the inlined variant of "bignum_modinv" with code from "bignum_inv_p25519" in all "edwards25519_scalarmul*" functions. Again, there are consequential changes related to the slightly different amount of temporary storage needed by bignum_inv_p25519. s2n-bignum original commit: awslabs/s2n-bignum@7e7b18e
aws · Nov 2, 2023 · e618f26 · e618f26
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commit e618f26
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Showing 8 changed files with 9,956 additions and 3,384 deletions.
diff --git a/arm/curve25519/edwards25519_scalarmulbase.S b/arm/curve25519/edwards25519_scalarmulbase.S
diff --git a/arm/curve25519/edwards25519_scalarmulbase_alt.S b/arm/curve25519/edwards25519_scalarmulbase_alt.S
diff --git a/arm/curve25519/edwards25519_scalarmuldouble.S b/arm/curve25519/edwards25519_scalarmuldouble.S
diff --git a/arm/curve25519/edwards25519_scalarmuldouble_alt.S b/arm/curve25519/edwards25519_scalarmuldouble_alt.S
diff --git a/x86_att/curve25519/edwards25519_scalarmulbase.S b/x86_att/curve25519/edwards25519_scalarmulbase.S
diff --git a/x86_att/curve25519/edwards25519_scalarmulbase_alt.S b/x86_att/curve25519/edwards25519_scalarmulbase_alt.S
diff --git a/x86_att/curve25519/edwards25519_scalarmuldouble.S b/x86_att/curve25519/edwards25519_scalarmuldouble.S
diff --git a/x86_att/curve25519/edwards25519_scalarmuldouble_alt.S b/x86_att/curve25519/edwards25519_scalarmuldouble_alt.S