Verifies that the supplied signature is a valid ECDSA signature of the supplied hash value using the supplied public key.
pointer to the hash value
length of the hash value
ECDSA_SIG structure
EC_KEY object containing a public EC key
1 if the signature is valid, 0 if the signature is invalid and -1 on error
See Implementation
Verifies that the supplied signature is a valid ECDSA signature of the supplied hash value using the supplied public key.