Create zkp_verifier.py

projects/DAPIO/security/zero-knowledge-proofs/zkp_verifier.py

@@ -0,0 +1,13 @@
+import hashlib
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives.asymmetric import ec
+from cryptography.hazmat.backends import default_backend
+
+class ZKPVerifier:
+    def __init__(self, public_key: str):
+        self.public_key = serialization.load_pem_public_key(public_key.encode(), backend=default_backend())
+
+    def verify(self, statement: str, proof: bytes) -> bool:
+        hash_value = hashlib.sha256(statement.encode()).digest()
+        signature = ec.ECDSA(self.public_key).verify(proof, hash_value)
+        return signature.valid