[#ECDSA_verify]
= ECDSA_verify
:mrdocs:

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

== Synopsis

Declared in `<openssl/ec.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
ECDSA_verify(
    int type,
    unsigned char const* dgst,
    int dgstlen,
    unsigned char const* sig,
    int siglen,
    xref:EC_KEY.adoc[EC_KEY]* eckey);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[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

[cols="1,4"]
|===
| Name| Description
| *type*
| this parameter is ignored
| *dgst*
| pointer to the hash value
| *dgstlen*
| length of the hash value
| *sig*
| pointer to the DER encoded signature
| *siglen*
| length of the DER encoded signature
| *eckey*
| EC_KEY object containing a public EC key
|===


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