[#ECDSA_SIG_get0_r]
= ECDSA_SIG_get0_r
:mrdocs:

Return a borrowed pointer to the r component of an ECDSA signature.

== Synopsis

Declared in `<openssl/ec.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BIGNUM.adoc[BIGNUM] const*
ECDSA_SIG_get0_r(xref:ECDSA_SIG.adoc[ECDSA_SIG] const* sig);
----

== Return Value

Internal pointer to r, or NULL if unset; do not free.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *sig*
| Signature to query.
|===


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