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libsec: remove asn1toDSApriv()

--- a/sys/include/ape/libsec.h

+++ b/sys/include/ape/libsec.h

@@ -465,7 +465,6 @@

 DSAsig*		dsasigalloc(void);

 void		dsasigfree(DSAsig*);

 DSApub*		dsaprivtopub(DSApriv*);

-DSApriv*	asn1toDSApriv(uchar*, int);

 /*

  * TLS

--- a/sys/include/libsec.h

+++ b/sys/include/libsec.h

@@ -457,7 +457,6 @@

 DSAsig*		dsasigalloc(void);

 void		dsasigfree(DSAsig*);

 DSApub*		dsaprivtopub(DSApriv*);

-DSApriv*	asn1toDSApriv(uchar*, int);

 /*

  * TLS

--- a/sys/src/libsec/port/x509.c

+++ b/sys/src/libsec/port/x509.c

@@ -2084,61 +2084,6 @@

 }

 /*

- * 	DSAPrivateKey ::= SEQUENCE{

- *		version Version,

- *		p INTEGER,

- *		q INTEGER,

- *		g INTEGER, -- alpha

- *		pub_key INTEGER, -- key

- *		priv_key INTEGER, -- secret

- *	}

- */

-DSApriv*

-asn1toDSApriv(uchar *buf, int len)

-{

-	int version;

-	Elem e;

-	Elist *el;

-	DSApriv* key = nil;

-

-	if(decode(buf, len, &e) != ASN_OK)

-		goto errret;

-	if(!is_seq(&e, &el) || elistlen(el) != 6)

-		goto errret;

-	version = -1;

-	if(!is_int(&el->hd, &version) || version != 0)

-		goto errret;

-

-	key = dsaprivalloc();

-	el = el->tl;

-	if((key->pub.p = asn1mpint(&el->hd)) == nil)

-		goto errret;

-

-	el = el->tl;

-	if((key->pub.q = asn1mpint(&el->hd)) == nil)

-		goto errret;

-

-	el = el->tl;

-	if((key->pub.alpha = asn1mpint(&el->hd)) == nil)

-		goto errret;

-

-	el = el->tl;

-	if((key->pub.key = asn1mpint(&el->hd)) == nil)

-		goto errret;

-

-	el = el->tl;

-	if((key->secret = asn1mpint(&el->hd)) == nil)

-		goto errret;

-

-	freevalfields(&e.val);

-	return key;

-errret:

-	freevalfields(&e.val);

-	dsaprivfree(key);

-	return nil;

-}

-

-/*

  * digest(CertificateInfo)

  * Our ASN.1 library doesn't return pointers into the original

  * data array, so we need to do a little hand decoding.