frost/secp256k1-zkp
3
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Improvements for coordinate decompression

Browse Source
This commit is contained in:
Pieter Wuille
2015-11-02 01:42:53 +01:00
parent e2100ad5b3
commit 646662517f
5 changed files with 94 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/field.h
View File

@@ -87,9 +87,11 @@ static void secp256k1_fe_mul(secp256k1_fe *r, const secp256k1_fe *a, const secp2
* The output magnitude is 1 (but not guaranteed to be normalized). */
static void secp256k1_fe_sqr(secp256k1_fe *r, const secp256k1_fe *a);
/** Sets a field element to be the (modular) square root (if any exist) of another. Requires the
* input's magnitude to be at most 8. The output magnitude is 1 (but not guaranteed to be
* normalized). Return value indicates whether a square root was found. */
/** If a has a square root, it is computed in r and 1 is returned. If a does not
* have a square root, the root of its negation is computed and 0 is returned.
* The input's magnitude can be at most 8. The output magnitude is 1 (but not
* guaranteed to be normalized). The result in r will always be a square
* itself. */
static int secp256k1_fe_sqrt_var(secp256k1_fe *r, const secp256k1_fe *a);
/** Sets a field element to be the (modular) inverse of another. Requires the input's magnitude to be