status-im
/
secp256k1
mirror of https://github.com/status-im/secp256k1.git
2
0
Fork 0
Code Issues Projects Releases Wiki Activity

schnorrsig: clarify result of calling nonce_function_bip340 without data

This commit is contained in:
Jonas Nick 2020-10-30 20:39:48 +00:00
parent 99e8614812
commit df3bfa12c3
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
include/secp256k1_schnorrsig.h
View File

@ -50,11 +50,11 @@ typedef int (*secp256k1_nonce_function_hardened)(
*
* If a data pointer is passed, it is assumed to be a pointer to 32 bytes of
* auxiliary random data as defined in BIP-340. If the data pointer is NULL,
* schnorrsig_sign does not produce BIP-340 compliant signatures. The algo16
* argument must be non-NULL, otherwise the function will fail and return 0.
* The hash will be tagged with algo16 after removing all terminating null
* bytes. Therefore, to create BIP-340 compliant signatures, algo16 must be set
* to "BIP0340/nonce\0\0\0"
* the nonce derivation procedure follows BIP-340 by setting the auxiliary
* random data to zero. The algo16 argument must be non-NULL, otherwise the
* function will fail and return 0. The hash will be tagged with algo16 after
* removing all terminating null bytes. Therefore, to create BIP-340 compliant
* signatures, algo16 must be set to "BIP0340/nonce\0\0\0"
*/
SECP256K1_API extern const secp256k1_nonce_function_hardened secp256k1_nonce_function_bip340;