X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/catacomb-python/blobdiff_plain/457b4e971a2795898c83a53ae4c27d6a893690d1..75e81374e45c342f15e4eaa658770548c472b15e:/rand.c?ds=inline

diff --git a/rand.c b/rand.c
index f163efa..6fe78bc 100644
--- a/rand.c
+++ b/rand.c
@@ -583,6 +583,12 @@ static PyTypeObject *gccrand_pytype, *gcrand_pytype, *gclatinrand_pytype;
 typedef grand *gcrand_func(const void *, size_t sz);
 typedef grand *gcirand_func(const void *, size_t sz, uint32);
 typedef grand *gcnrand_func(const void *, size_t sz, const void *);
+typedef grand *gcshakerand_func(const void *, size_t,
+				const void *, size_t,
+				const void *, size_t);
+typedef grand *gcshafuncrand_func(const void *, size_t,
+				  const void *, size_t);
+typedef grand *gckmacrand_func(const void *, size_t, const void *, size_t);
 typedef struct gccrand_info {
   const char *name;
   const octet *keysz;
@@ -591,9 +597,15 @@ typedef struct gccrand_info {
   gcrand_func *func;
 } gccrand_info;
 
-#define RNGF_INT 1u
-#define RNGF_NONCE 2u
-#define RNGF_LATIN 4u
+#define RNGF_MASK 255u
+
+enum {
+  RNG_PLAIN = 0,
+  RNG_SEAL,
+  RNG_LATIN,
+  RNG_SHAKE,
+  RNG_KMAC
+};
 
 typedef struct gccrand_pyobj {
   PyHeapTypeObject ty;
@@ -665,22 +677,56 @@ end:
   return (0);
 }
 
+static PyObject *gcshakyrand_pynew(PyTypeObject *ty,
+				   PyObject *arg, PyObject *kw)
+{
+  const gccrand_info *info = GCCRAND_INFO(ty);
+  static char *kwlist_shake[] = { "key", "func", "perso", 0 };
+  static char *kwlist_func[] = { "key", "perso", 0 };
+  char *k, *f = 0, *p = 0;
+  Py_ssize_t ksz, fsz = 0, psz = 0;
+
+  if ((info->f&RNGF_MASK) == RNG_SHAKE
+	? !PyArg_ParseTupleAndKeywords(arg, kw, "s#|s#s#:new", kwlist_shake,
+				       &k, &ksz, &f, &fsz, &p, &psz)
+	: !PyArg_ParseTupleAndKeywords(arg, kw, "s#|s#:new", kwlist_func,
+				       &k, &ksz, &p, &psz))
+    goto end;
+  if (keysz(ksz, info->keysz) != ksz) VALERR("bad key length");
+  return (grand_dopywrap(ty,
+			 (info->f&RNGF_MASK) == RNG_SHAKE
+			   ? ((gcshakerand_func *)info->func)(f, fsz,
+							      p, psz,
+							      k, ksz)
+			   : ((gcshafuncrand_func *)info->func)(p, psz,
+								k, ksz),
+			 f_freeme));
+end:
+  return (0);
+}
+
 static PyObject *gccrand_pywrap(const gccrand_info *info)
 {
   gccrand_pyobj *g = newtype(gccrand_pytype, 0, info->name);
   g->info = info;
   g->ty.ht_type.tp_basicsize = sizeof(grand_pyobj);
-  g->ty.ht_type.tp_base =
-    (info->f & RNGF_LATIN) ? gclatinrand_pytype : gcrand_pytype;
+  switch (info->f&RNGF_MASK) {
+    case RNG_LATIN: g->ty.ht_type.tp_base = gclatinrand_pytype; break;
+    default: g->ty.ht_type.tp_base = gcrand_pytype; break;
+  }
   Py_INCREF(g->ty.ht_type.tp_base);
   g->ty.ht_type.tp_flags = (Py_TPFLAGS_DEFAULT |
 			    Py_TPFLAGS_BASETYPE |
 			    Py_TPFLAGS_HEAPTYPE);
   g->ty.ht_type.tp_alloc = PyType_GenericAlloc;
   g->ty.ht_type.tp_free = 0;
-  if (info->f & RNGF_INT) g->ty.ht_type.tp_new = gcirand_pynew;
-  else if (info->f & RNGF_NONCE) g->ty.ht_type.tp_new = gcnrand_pynew;
-  else g->ty.ht_type.tp_new = gcrand_pynew;
+  switch (info->f&RNGF_MASK) {
+    case RNG_LATIN: g->ty.ht_type.tp_new = gcnrand_pynew; break;
+    case RNG_SEAL: g->ty.ht_type.tp_new = gcirand_pynew; break;
+    case RNG_SHAKE: case RNG_KMAC:
+      g->ty.ht_type.tp_new = gcshakyrand_pynew; break;
+    default: g->ty.ht_type.tp_new = gcrand_pynew; break;
+  }
   typeready(&g->ty.ht_type);
   return ((PyObject *)g);
 }