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#include <lib9.h>
#include <kernel.h>
#include <isa.h>
#include "interp.h"
#include "../libinterp/runt.h"
#include "mp.h"
#include "libsec.h"
#include "keys.h"
static char* pkattr[] = { "p", "q", "alpha", "key", nil };
static char* skattr[] = { "p", "q", "alpha", "key", "!secret", nil };
static char* sigattr[] = { "r", "s", nil };
static void*
dsa_str2sk(char *str, char **strp)
{
DSApriv *dsa;
char *p;
dsa = dsaprivalloc();
dsa->pub.p = base64tobig(str, &p);
dsa->pub.q = base64tobig(str, &p);
dsa->pub.alpha = base64tobig(p, &p);
dsa->pub.key = base64tobig(p, &p);
dsa->secret = base64tobig(p, &p);
if(strp)
*strp = p;
if(dsa->pub.p == nil || dsa->pub.q == nil ||
dsa->pub.alpha == nil || dsa->pub.key == nil || dsa->secret == nil){
dsaprivfree(dsa);
return nil;
}
return dsa;
}
static void*
dsa_str2pk(char *str, char **strp)
{
DSApub *dsa;
char *p;
dsa = dsapuballoc();
dsa->p = base64tobig(str, &p);
dsa->q = base64tobig(str, &p);
dsa->alpha = base64tobig(p, &p);
dsa->key = base64tobig(p, &p);
if(strp)
*strp = p;
if(dsa->p == nil || dsa->q == nil || dsa->alpha == nil || dsa->key == nil){
dsapubfree(dsa);
return nil;
}
return dsa;
}
static void*
dsa_str2sig(char *str, char **strp)
{
DSAsig *dsa;
char *p;
dsa = dsasigalloc();
dsa->r = base64tobig(str, &p);
dsa->s = base64tobig(p, &p);
if(strp)
*strp = p;
if(dsa->r == nil || dsa->s == nil){
dsasigfree(dsa);
return nil;
}
return dsa;
}
static int
dsa_sk2str(void *veg, char *buf, int len)
{
DSApriv *dsa;
char *cp, *ep;
dsa = veg;
ep = buf + len - 1;
cp = buf;
cp += snprint(cp, ep - cp, "%U\n", dsa->pub.p);
cp += snprint(cp, ep - cp, "%U\n", dsa->pub.q);
cp += snprint(cp, ep - cp, "%U\n", dsa->pub.alpha);
cp += snprint(cp, ep - cp, "%U\n", dsa->pub.key);
cp += snprint(cp, ep - cp, "%U\n", dsa->secret);
*cp = 0;
return cp - buf;
}
static int
dsa_pk2str(void *veg, char *buf, int len)
{
DSApub *dsa;
char *cp, *ep;
dsa = veg;
ep = buf + len - 1;
cp = buf;
cp += snprint(cp, ep - cp, "%U\n", dsa->p);
cp += snprint(cp, ep - cp, "%U\n", dsa->q);
cp += snprint(cp, ep - cp, "%U\n", dsa->alpha);
cp += snprint(cp, ep - cp, "%U\n", dsa->key);
*cp = 0;
return cp - buf;
}
static int
dsa_sig2str(void *veg, char *buf, int len)
{
DSAsig *dsa;
char *cp, *ep;
dsa = veg;
ep = buf + len - 1;
cp = buf;
cp += snprint(cp, ep - cp, "%U\n", dsa->r);
cp += snprint(cp, ep - cp, "%U\n", dsa->s);
*cp = 0;
return cp - buf;
}
static void*
dsa_sk2pk(void *vs)
{
return dsaprivtopub((DSApriv*)vs);
}
/* generate a dsa secret key with new params */
static void*
dsa_gen(int len)
{
USED(len);
return dsagen(nil);
}
/* generate a dsa secret key with same params as a public key */
static void*
dsa_genfrompk(void *vpub)
{
return dsagen((DSApub*)vpub);
}
static void
dsa_freepub(void *a)
{
dsapubfree((DSApub*)a);
}
static void
dsa_freepriv(void *a)
{
dsaprivfree((DSApriv*)a);
}
static void
dsa_freesig(void *a)
{
dsasigfree((DSAsig*)a);
}
static void*
dsa_sign(mpint* md, void *key)
{
return dsasign((DSApriv*)key, md);
}
static int
dsa_verify(mpint* md, void *sig, void *key)
{
return dsaverify((DSApub*)key, (DSAsig*)sig, md) == 0;
}
SigAlgVec*
dsainit(void)
{
SigAlgVec *vec;
vec = malloc(sizeof(SigAlgVec));
if(vec == nil)
return nil;
vec->name = "dsa";
vec->pkattr = pkattr;
vec->skattr = skattr;
vec->sigattr = sigattr;
vec->str2sk = dsa_str2sk;
vec->str2pk = dsa_str2pk;
vec->str2sig = dsa_str2sig;
vec->sk2str = dsa_sk2str;
vec->pk2str = dsa_pk2str;
vec->sig2str = dsa_sig2str;
vec->sk2pk = dsa_sk2pk;
vec->gensk = dsa_gen;
vec->genskfrompk = dsa_genfrompk;
vec->sign = dsa_sign;
vec->verify = dsa_verify;
vec->skfree = dsa_freepriv;
vec->pkfree = dsa_freepub;
vec->sigfree = dsa_freesig;
return vec;
}
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