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In order to prevent frequent memory allocations, the user can create a single Context object and re-use it between subsequent cryptographic operations.
62 lines
1.6 KiB
Python
62 lines
1.6 KiB
Python
from typing import *
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# extmod/modtrezorcrypto/modtrezorcrypto-secp256k1_zkp.h
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class Context:
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"""
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Owns a secp256k1 context.
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Can be allocated once and re-used between subsequent operations.
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"""
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def __init__(self):
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"""
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Allocate and initialize secp256k1_context.
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"""
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def __del__(self):
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"""
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Destructor.
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"""
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def size(self):
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"""
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Return the size in bytes of the internal secp256k1_ctx_buf buffer.
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"""
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def generate_secret(self) -> bytes:
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"""
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Generate secret key.
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"""
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def publickey(self, secret_key: bytes, compressed: bool = True) -> bytes:
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"""
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Computes public key from secret key.
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"""
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def sign(
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self, secret_key: bytes, digest: bytes, compressed: bool = True
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) -> bytes:
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"""
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Uses secret key to produce the signature of the digest.
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"""
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def verify(
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self, public_key: bytes, signature: bytes, digest: bytes
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) -> bool:
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"""
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Uses public key to verify the signature of the digest.
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Returns True on success.
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"""
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def verify_recover(self, signature: bytes, digest: bytes) -> bytes:
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"""
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Uses signature of the digest to verify the digest and recover the public
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key. Returns public key on success, None if the signature is invalid.
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"""
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def multiply(self, secret_key: bytes, public_key: bytes) -> bytes:
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"""
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Multiplies point defined by public_key with scalar defined by
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secret_key. Useful for ECDH.
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"""
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