/* -*-c-*-
- *
- * $Id$
*
* Public-key cryptography
*
}
static PyObject *dsa_setup(PyTypeObject *ty, PyObject *G, PyObject *u,
- PyObject *p, PyObject *rng, PyObject *hash)
+ PyObject *p, PyObject *rng, PyObject *hash,
+ void (*calcpub)(group *, ge *, mp *))
{
dsa_pyobj *g;
+ ge *pp;
g = PyObject_New(dsa_pyobj, ty);
- if (GROUP_G(G) != GE_G(p) && !group_samep(GROUP_G(G), GE_G(p)))
- TYERR("public key not from group");
+ if (p) Py_INCREF(p);
if (!u) {
g->d.u = 0;
u = Py_None;
} else if ((g->d.u = getmp(u)) == 0)
goto end;
+ if (!p) {
+ assert(g->d.u); assert(calcpub);
+ pp = G_CREATE(GROUP_G(G));
+ calcpub(GROUP_G(G), pp, g->d.u);
+ p = ge_pywrap(G, pp);
+ } else if (GROUP_G(G) != GE_G(p) && !group_samep(GROUP_G(G), GE_G(p)))
+ TYERR("public key not from group");
g->d.g = GROUP_G(G);
g->d.p = GE_X(p);
g->d.r = GRAND_R(rng);
g->d.h = GCHASH_CH(hash);
- g->G = G; Py_INCREF(G); g->u = u; Py_INCREF(u); g->p = p; Py_INCREF(p);
+ g->G = G; Py_INCREF(G); g->u = u; Py_INCREF(u); g->p = p;
g->rng = rng; Py_INCREF(rng); g->hash = hash; Py_INCREF(hash);
return ((PyObject *)g);
end:
+ if (p) Py_DECREF(p);
FREEOBJ(g);
return (0);
}
static PyObject *dsapub_pynew(PyTypeObject *ty,
PyObject *arg, PyObject *kw)
{
- PyObject *G, *p, *u = 0, *rng = rand_pyobj, *hash = sha_pyobj;
+ PyObject *G, *p, *rng = rand_pyobj, *hash = sha_pyobj;
PyObject *rc = 0;
- char *kwlist[] = { "G", "p", "u", "hash", "rng", 0 };
+ char *kwlist[] = { "G", "p", "hash", "rng", 0 };
- if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!|OO!O!:new", kwlist,
+ if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!|O!O!:new", kwlist,
group_pytype, &G,
ge_pytype, &p,
- &u,
gchash_pytype, &hash,
grand_pytype, &rng) ||
- (rc = dsa_setup(dsapub_pytype, G, u, p, rng, hash)) == 0)
+ (rc = dsa_setup(dsapub_pytype, G, 0, p, rng, hash, 0)) == 0)
goto end;
end:
return (rc);
{
gdsa_sig s = GDSA_SIG_INIT;
char *p;
- int n;
+ Py_ssize_t n;
mp *k = 0;
PyObject *rc = 0;
char *kwlist[] = { "msg", "k", 0 };
static PyObject *dsameth_verify(PyObject *me, PyObject *arg)
{
char *p;
- int n;
+ Py_ssize_t n;
gdsa_sig s = GDSA_SIG_INIT;
PyObject *rc = 0;
return (rc);
}
+static void dsa_calcpub(group *g, ge *p, mp *u) { G_EXP(g, p, g->g, u); }
+
static PyObject *dsapriv_pynew(PyTypeObject *ty,
PyObject *arg, PyObject *kw)
{
- PyObject *G, *p, *u = Py_None, *rng = rand_pyobj, *hash = sha_pyobj;
+ PyObject *G, *p = 0, *u, *rng = rand_pyobj, *hash = sha_pyobj;
PyObject *rc = 0;
- char *kwlist[] = { "G", "p", "u", "hash", "rng", 0 };
+ char *kwlist[] = { "G", "u", "p", "hash", "rng", 0 };
- if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!O|O!O!:new", kwlist,
+ if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O|O!O!O!:new", kwlist,
group_pytype, &G,
- ge_pytype, &p,
&u,
+ ge_pytype, &p,
gchash_pytype, &hash,
grand_pytype, &rng) ||
- (rc = dsa_setup(dsapriv_pytype, G, u, p, rng, hash)) == 0)
+ (rc = dsa_setup(dsapriv_pytype, G, u, p, rng, hash, dsa_calcpub)) == 0)
goto end;
end:
return (rc);
static PyTypeObject dsapub_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.DSAPub", /* @tp_name@ */
+ "DSAPub", /* @tp_name@ */
sizeof(dsa_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
static PyTypeObject dsapriv_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.DSAPriv", /* @tp_name@ */
+ "DSAPriv", /* @tp_name@ */
sizeof(dsa_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
static PyObject *kcdsapub_pynew(PyTypeObject *ty,
PyObject *arg, PyObject *kw)
{
- PyObject *G, *p, *u = 0, *rng = rand_pyobj, *hash = has160_pyobj;
+ PyObject *G, *p, *rng = rand_pyobj, *hash = has160_pyobj;
PyObject *rc = 0;
- char *kwlist[] = { "G", "p", "u", "hash", "rng", 0 };
+ char *kwlist[] = { "G", "p", "hash", "rng", 0 };
- if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!O|O!O!:new", kwlist,
+ if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!|O!O!:new", kwlist,
group_pytype, &G,
ge_pytype, &p,
- &u,
gchash_pytype, &hash,
grand_pytype, &rng) ||
- (rc = dsa_setup(kcdsapub_pytype, G, u, p, rng, hash)) == 0)
+ (rc = dsa_setup(kcdsapub_pytype, G, 0, p, rng, hash, 0)) == 0)
goto end;
end:
return (rc);
}
+static void kcdsa_calcpub(group *g, ge *p, mp *u)
+{
+ mp *uinv = mp_modinv(MP_NEW, u, g->r);
+ G_EXP(g, p, g->g, uinv);
+ mp_drop(uinv);
+}
+
static PyObject *kcdsapriv_pynew(PyTypeObject *ty,
PyObject *arg, PyObject *kw)
{
- PyObject *G, *p, *u = Py_None, *rng = rand_pyobj, *hash = has160_pyobj;
+ PyObject *G, *u, *p = 0, *rng = rand_pyobj, *hash = has160_pyobj;
PyObject *rc = 0;
char *kwlist[] = { "G", "p", "u", "hash", "rng", 0 };
- if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O!|OO!O!:new", kwlist,
+ if (!PyArg_ParseTupleAndKeywords(arg, kw, "O!O|O!O!O!:new", kwlist,
group_pytype, &G,
- ge_pytype, &p,
&u,
+ ge_pytype, &p,
gchash_pytype, &hash,
grand_pytype, &rng) ||
- (rc = dsa_setup(kcdsapriv_pytype, G, u, p, rng, hash)) == 0)
+ (rc = dsa_setup(kcdsapriv_pytype, G, u, p,
+ rng, hash, kcdsa_calcpub)) == 0)
goto end;
end:
return (rc);
{
gkcdsa_sig s = GKCDSA_SIG_INIT;
char *p;
- int n;
+ Py_ssize_t n;
mp *k = 0;
PyObject *r = 0, *rc = 0;
char *kwlist[] = { "msg", "k", 0 };
static PyObject *kcdsameth_verify(PyObject *me, PyObject *arg)
{
char *p;
- int n, rn;
+ Py_ssize_t n, rn;
gkcdsa_sig s = GKCDSA_SIG_INIT;
PyObject *rc = 0;
static PyTypeObject kcdsapub_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.KCDSAPub", /* @tp_name@ */
+ "KCDSAPub", /* @tp_name@ */
sizeof(dsa_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
static PyTypeObject kcdsapriv_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.KCDSAPriv", /* @tp_name@ */
+ "KCDSAPriv", /* @tp_name@ */
sizeof(dsa_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&O&:new", kwlist,
convmp, &rp.n, convmp, &rp.e))
goto end;
+ if (!MP_ODDP(rp.n)) VALERR("RSA modulus must be even");
o = (rsapub_pyobj *)ty->tp_alloc(ty, 0);
o->pub = rp;
rsa_pubcreate(&o->pubctx, &o->pub);
convmp, &rp.q_inv,
&rng))
goto end;
+ if ((rp.n && !MP_ODDP(rp.n)) ||
+ (rp.p && !MP_ODDP(rp.p)) ||
+ (rp.p && !MP_ODDP(rp.q)))
+ VALERR("RSA modulus and factors must be odd");
if (rsa_recover(&rp)) VALERR("couldn't construct private key");
if (rng != Py_None && !GRAND_PYCHECK(rng))
TYERR("not a random number source");
static PyTypeObject rsapub_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.RSAPub", /* @tp_name@ */
+ "RSAPub", /* @tp_name@ */
sizeof(rsapub_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
static PyTypeObject rsapriv_pytype_skel = {
PyObject_HEAD_INIT(0) 0, /* Header */
- "catacomb.RSAPriv", /* @tp_name@ */
+ "RSAPriv", /* @tp_name@ */
sizeof(rsapriv_pyobj), /* @tp_basicsize@ */
0, /* @tp_itemsize@ */
{
pkcs1 p1;
char *m, *ep;
- int msz, epsz;
+ Py_ssize_t msz, epsz;
unsigned long nbits;
PyObject *rc = 0;
octet *b = 0;
{
pkcs1 p1;
char *ep;
- int epsz;
+ Py_ssize_t epsz;
unsigned long nbits;
int n;
PyObject *rc = 0;
{
pkcs1 p1;
char *m, *ep;
- int msz, epsz;
+ Py_ssize_t msz, epsz;
unsigned long nbits;
PyObject *rc = 0;
octet *b = 0;
{
pkcs1 p1;
char *ep;
- int epsz;
+ Py_ssize_t epsz;
unsigned long nbits;
int n;
PyObject *hukairz;
{
oaep o;
char *m, *ep;
- int msz, epsz;
+ Py_ssize_t msz, epsz;
unsigned long nbits;
PyObject *rc = 0;
octet *b = 0;
{
oaep o;
char *ep;
- int epsz;
+ Py_ssize_t epsz;
unsigned long nbits;
int n;
PyObject *rc = 0;
{
pss p;
char *m;
- int msz;
+ Py_ssize_t msz;
unsigned long nbits;
PyObject *rc = 0;
octet *b = 0;
{
pss p;
char *m;
- int msz;
+ Py_ssize_t msz;
unsigned long nbits;
PyObject *rc = 0;
octet *b = 0;
return (rc);
}
+/*----- X25519 and related algorithms -------------------------------------*/
+
+static PyObject *meth_x25519(PyObject *me, PyObject *arg)
+{
+ const char *k, *p;
+ Py_ssize_t ksz, psz;
+ PyObject *rc = 0;
+ if (!PyArg_ParseTuple(arg, "s#s#:x25519", &k, &ksz, &p, &psz)) goto end;
+ if (ksz != X25519_KEYSZ) VALERR("bad key length");
+ if (psz != X25519_PUBSZ) VALERR("bad public length");
+ rc = bytestring_pywrap(0, X25519_OUTSZ);
+ x25519((octet *)PyString_AS_STRING(rc),
+ (const octet *)k, (const octet *)p);
+ return (rc);
+end:
+ return (0);
+}
+
+static PyObject *meth_x448(PyObject *me, PyObject *arg)
+{
+ const char *k, *p;
+ Py_ssize_t ksz, psz;
+ PyObject *rc = 0;
+ if (!PyArg_ParseTuple(arg, "s#s#:x448", &k, &ksz, &p, &psz)) goto end;
+ if (ksz != X448_KEYSZ) VALERR("bad key length");
+ if (psz != X448_PUBSZ) VALERR("bad public length");
+ rc = bytestring_pywrap(0, X448_OUTSZ);
+ x448((octet *)PyString_AS_STRING(rc),
+ (const octet *)k, (const octet *)p);
+ return (rc);
+end:
+ return (0);
+}
+
+/*----- Ed25519 -----------------------------------------------------------*/
+
+static PyObject *meth_ed25519_pubkey(PyObject *me, PyObject *arg)
+{
+ const char *k;
+ Py_ssize_t ksz;
+ PyObject *rc = 0;
+ if (!PyArg_ParseTuple(arg, "s#:ed25519_pubkey", &k, &ksz)) goto end;
+ rc = bytestring_pywrap(0, ED25519_PUBSZ);
+ ed25519_pubkey((octet *)PyString_AS_STRING(rc), k, ksz);
+ return (rc);
+end:
+ return (0);
+}
+
+static PyObject *meth_ed25519_sign(PyObject *me, PyObject *arg, PyObject *kw)
+{
+ const char *k, *p = 0, *m;
+ Py_ssize_t ksz, psz, msz;
+ PyObject *rc = 0;
+ octet pp[ED25519_PUBSZ];
+ char *kwlist[] = { "key", "msg", "pub", 0 };
+ if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#s#|s#:ed25519_sign", kwlist,
+ &k, &ksz, &m, &msz, &p, &psz))
+ goto end;
+ if (p && psz != ED25519_PUBSZ) VALERR("bad public length");
+ if (!p) { p = (const char *)pp; ed25519_pubkey(pp, k, ksz); }
+ rc = bytestring_pywrap(0, ED25519_SIGSZ);
+ ed25519_sign((octet *)PyString_AS_STRING(rc), k, ksz,
+ (const octet *)p, m, msz);
+ return (rc);
+end:
+ return (0);
+}
+
+static PyObject *meth_ed25519_verify(PyObject *me, PyObject *arg)
+{
+ const char *p, *m, *s;
+ Py_ssize_t psz, msz, ssz;
+ PyObject *rc = 0;
+ if (!PyArg_ParseTuple(arg, "s#s#s#:ed25519_verify",
+ &p, &psz, &m, &msz, &s, &ssz))
+ goto end;
+ if (psz != ED25519_PUBSZ) VALERR("bad public length");
+ if (ssz != ED25519_SIGSZ) VALERR("bad signature length");
+ rc = getbool(!ed25519_verify((const octet *)p, m, msz, (const octet *)s));
+ return (rc);
+end:
+ return (0);
+}
+
/*----- Global stuff ------------------------------------------------------*/
static PyMethodDef methods[] = {
KWMETH(_pss_decode, 0)
KWMETH(_RSAPriv_generate, "\
generate(NBITS, [event = pgen_nullev, rng = rand, nsteps = 0]) -> R")
+ METH (x25519, "\
+x25519(KEY, PUBLIC) -> SHARED")
+ METH (x448, "\
+x448(KEY, PUBLIC) -> SHARED")
+ METH (ed25519_pubkey, "\
+ed25519_pubkey(KEY) -> PUBLIC")
+ KWMETH(ed25519_sign, "\
+ed25519_sign(KEY, MSG, [PUBLIC]) -> SIG")
+ METH (ed25519_verify, "\
+ed25519_verify(PUBLIC, MSG, SIG) -> BOOL")
#undef METHNAME
{ 0 }
};
~mdw / catacomb-python / blobdiff