Author: Richard Kiss 2015-10-03 18:02:39
Published on: 2015-10-03T18:02:39+00:00
The context mentions a problem with libsec256k1 which runs SHA256(y||x), but openssl throws away y and just gives x. The author suggests running HMAC twice and picking the value that worked. The library pycoin has a function to get Y from X, and the code can be found on GitHub.
Updated on: 2023-05-23T20:57:42.722471+00:00