Module hazmat 

Low-level ECDSA primitives.

Security️ Warning: Hazardous Materials!

YOU PROBABLY DON’T WANT TO USE THESE!

These primitives are easy-to-misuse low-level interfaces.

If you are an end user / non-expert in cryptography, do not use these! Failure to use them correctly can lead to catastrophic failures including FULL PRIVATE KEY RECOVERY!

Functions

bytes2scalar 🔒

Convert the provided bytestring into a Scalar for the given curve, interpreting it as big endian, zero-padding or truncating it to the bit length of n (curve order) if necessary, and then reducing it mod n.

sign_prehashed

Sign a prehashed message digest using the provided secret scalar and ephemeral scalar, returning an ECDSA signature.

sign_prehashed_rfc6979

Try to sign the given message digest deterministically using the method described in RFC6979 for computing ECDSA ephemeral scalar k.

verify_prehashed

Verify the prehashed message against the provided ECDSA signature.