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implement Keyreps;
include "sys.m";
sys: Sys;
include "keyring.m";
kr: Keyring;
IPint: import kr;
include "sexprs.m";
include "spki.m";
include "encoding.m";
base64: Encoding;
include "keyreps.m";
init()
{
sys = load Sys Sys->PATH;
kr = load Keyring Keyring->PATH;
base64 = load Encoding Encoding->BASE64PATH;
}
keyextract(flds: list of string, names: list of (string, int)): list of (string, ref IPint)
{
a := array[len flds] of ref IPint;
for(i := 0; i < len a; i++){
a[i] = IPint.b64toip(hd flds);
flds = tl flds;
}
rl: list of (string, ref IPint);
for(; names != nil; names = tl names){
(n, p) := hd names;
if(p < len a)
rl = (n, a[p]) :: rl;
}
return revt(rl);
}
Keyrep.pk(pk: ref Keyring->PK): ref Keyrep.PK
{
s := kr->pktostr(pk);
(nf, flds) := sys->tokenize(s, "\n");
if((nf -= 2) < 0)
return nil;
case hd flds {
"rsa" =>
return ref Keyrep.PK(hd flds, hd tl flds,
keyextract(tl tl flds, list of {("e",1), ("n",0)}));
"elgamal" or "dsa" =>
return ref Keyrep.PK(hd flds, hd tl flds,
keyextract(tl tl flds, list of {("p",0), ("alpha",1), ("key",2)}));
* =>
return nil;
}
}
Keyrep.sk(pk: ref Keyring->SK): ref Keyrep.SK
{
s := kr->pktostr(pk);
(nf, flds) := sys->tokenize(s, "\n");
if((nf -= 2) < 0)
return nil;
case hd flds {
"rsa" =>
return ref Keyrep.SK(hd flds, hd tl flds,
keyextract(tl tl flds,list of {("e",1), ("n",0), ("!dk",2), ("!p",3), ("!q",4), ("!kp",5), ("!kq",6), ("!c2",7)}));
"elgamal" or "dsa" =>
return ref Keyrep.SK(hd flds, hd tl flds,
keyextract(tl tl flds, list of {("p",0), ("alpha",1), ("key",2), ("!secret",3)}));
* =>
return nil;
}
}
Keyrep.get(k: self ref Keyrep, n: string): ref IPint
{
for(el := k.els; el != nil; el = tl el)
if((hd el).t0 == n)
return (hd el).t1;
return nil;
}
Keyrep.getb(k: self ref Keyrep, n: string): array of byte
{
v := k.get(n);
if(v == nil)
return nil;
return pre0(v.iptobebytes());
}
pre0(a: array of byte): array of byte
{
for(i:=0; i<len a-1; i++)
if(a[i] != a[i+1] && (a[i] != byte 0 || (int a[i+1] & 16r80) != 0))
break;
if(i > 0)
a = a[i:];
if(len a < 1 || (int a[0] & 16r80) == 0)
return a;
b := array[len a + 1] of byte;
b[0] = byte 0;
b[1:] = a;
return b;
}
Keyrep.mkpk(k: self ref Keyrep): (ref Keyring->PK, int)
{
case k.alg {
"rsa" =>
e := k.get("e");
n := k.get("n");
return (kr->strtopk(sys->sprint("rsa\n%s\n%s\n%s\n", k.owner, n.iptob64(), e.iptob64())), n.bits());
* =>
raise "Keyrep: unknown algorithm" + k.alg;
}
}
Keyrep.mksk(k: self ref Keyrep): ref Keyring->SK
{
case k.alg {
"rsa" =>
e := k.get("e");
n := k.get("n");
dk := k.get("!dk");
p := k.get("!p");
q := k.get("!q");
kp := k.get("!kp");
kq := k.get("!kq");
c12 := k.get("!c2");
return kr->strtosk(sys->sprint("rsa\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
k.owner, n.iptob64(), e.iptob64(), dk.iptob64(), p.iptob64(), q.iptob64(),
kp.iptob64(), kq.iptob64(), c12.iptob64()));
* =>
raise "Keyrep: unknown algorithm";
}
}
Keyrep.eq(k1: self ref Keyrep, k2: ref Keyrep): int
{
# n but n is small
for(l1 := k1.els; l1 != nil; l1 = tl l1){
(n, v1) := hd l1;
v2 := k2.get(n);
if(v2 == nil || !v1.eq(v2))
return 0;
}
for(l2 := k2.els; l2 != nil; l2 = tl l2)
if(k1.get((hd l2).t0) == nil)
return 0;
return 1;
}
Keyrep.mkkey(kr: self ref Keyrep): ref SPKI->Key
{
k := ref SPKI->Key;
(k.pk, k.nbits) = kr.mkpk();
k.sk = kr.mksk();
return k;
}
sig2icert(sig: ref SPKI->Signature, signer: string, exp: int): ref Keyring->Certificate
{
if(sig.sig == nil)
return nil;
s := sys->sprint("%s\n%s\n%s\n%d\n%s\n", "rsa", sig.hash.alg, signer, exp, base64->enc((hd sig.sig).t1));
#sys->print("alg %s *** %s\n", sig.sa, base64->enc((hd sig.sig).t1));
return kr->strtocert(s);
}
revt[S,T](l: list of (S,T)): list of (S,T)
{
rl: list of (S,T);
for(; l != nil; l = tl l)
rl = hd l :: rl;
return rl;
}
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