Verifies that the supplied signature is a valid ECDSA signature of the supplied hash value using the supplied public key.

Synopsis

Declared in <openssl/ec.h>

[[deprecated]]
int
ECDSA_do_verify(
    unsigned char const* dgst,
    int dgst_len,
    ECDSA_SIG const* sig,
    EC_KEY* eckey);
Warning

Deprecated. Use of this entity is allowed but discouraged.

Return Value

1 if the signature is valid, 0 if the signature is invalid and ‐1 on error

Parameters

Name

Description

dgst

pointer to the hash value

dgst_len

length of the hash value

sig

ECDSA_SIG structure

eckey

EC_KEY object containing a public EC key

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