#use wml::openssl-macros area=docs page=EVP_PKEY_get_default_digest

<title>Documents, EVP_PKEY_get_default_digest(3)</title>

<h1>EVP_PKEY_get_default_digest(3)</h1>

#use wml::imp::generic

{:
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[[s|<P>\s+</|</|sg]]
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	<LI><A HREF="#NAME">NAME</A>
	<LI><A HREF="#SYNOPSIS">SYNOPSIS</A>
	<LI><A HREF="#DESCRIPTION">DESCRIPTION</A>
	<LI><A HREF="#NOTES">NOTES</A>
	<LI><A HREF="#RETURN_VALUES">RETURN VALUES</A>
	<LI><A HREF="#SEE_ALSO">SEE ALSO</A>
	<LI><A HREF="#HISTORY">HISTORY</A>
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<H1><A NAME="NAME">NAME</A></H1>
<P>
EVP_PKEY_get_default_digest_nid - get default signature digest

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<H1><A NAME="SYNOPSIS">SYNOPSIS</A></H1>
<PRE> #include &lt;openssl/evp.h&gt;
 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid);
</PRE>
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<H1><A NAME="DESCRIPTION">DESCRIPTION</A></H1>
<P>
The <CODE>EVP_PKEY_get_default_digest_nid()</CODE> function sets <STRONG>pnid</STRONG> to the default message digest NID for the public key signature operations
associated with key
<STRONG>pkey</STRONG>.

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<H1><A NAME="NOTES">NOTES</A></H1>
<P>
For all current standard OpenSSL public key algorithms SHA1 is returned.

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<H1><A NAME="RETURN_VALUES">RETURN VALUES</A></H1>
<P>
The <CODE>EVP_PKEY_get_default_digest_nid()</CODE> function returns 1 if
the message digest is advisory (that is other digests can be used) and 2 if
it is mandatory (other digests can not be used). It returns 0 or a negative
value for failure. In particular a return value of -2 indicates the
operation is not supported by the public key algorithm.

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<H1><A NAME="SEE_ALSO">SEE ALSO</A></H1>
<P>
<A HREF="../crypto/EVP_PKEY_CTX_new.html#">EVP_PKEY_CTX_new(3)</A>,
<A HREF="../crypto/EVP_PKEY_sign.html#">EVP_PKEY_sign(3)</A>,
<A HREF="../crypto/EVP_PKEY_verify.html#">EVP_PKEY_verify(3)</A>,
<A HREF="../crypto/EVP_PKEY_verify_recover.html#">EVP_PKEY_verify_recover(3)</A>,

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<H1><A NAME="HISTORY">HISTORY</A></H1>
<P>
This function was first added to OpenSSL 1.0.0.

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:}