ref: c739f57ac2f136e67be63a4678d4171889057105
dir: /sys/src/cmd/python/Modules/sechashmodule.c/
/* Plan 9 sechash(2) module */
#include "Python.h"
#include "structmember.h"
#define _PLAN9_SOURCE
#include <libsec.h>
typedef struct {
PyObject_HEAD
char *t;
int n, b;
DigestState *(*f)(uchar *, ulong, uchar *, DigestState *);
DigestState s;
} SHobject;
static PyTypeObject MD5type;
static PyTypeObject SHA1type;
static PyTypeObject SHA224type;
static PyTypeObject SHA256type;
static PyTypeObject SHA384type;
static PyTypeObject SHA512type;
static void
sh_copy(SHobject *src, SHobject *dest)
{
dest->t = src->t;
dest->n = src->n;
dest->b = src->b;
dest->f = src->f;
dest->s = src->s;
}
static void
sh_update(SHobject *s, uchar *buffer, int count)
{
(*s->f)(buffer, count, NULL, &s->s);
}
static void
sh_final(SHobject *s, uchar digest[])
{
(*s->f)(NULL, 0, (uchar*)digest, &s->s);
}
static void
sh_dealloc(PyObject *ptr)
{
PyObject_Del(ptr);
}
PyDoc_STRVAR(SH_copy__doc__, "Return a copy of the hash object.");
static PyObject *
SH_copy(SHobject *self, PyObject *unused)
{
SHobject *newobj;
newobj = PyObject_New(SHobject, ((PyObject*)self)->ob_type);
if(newobj != NULL)
sh_copy(self, newobj);
return (PyObject *)newobj;
}
PyDoc_STRVAR(SH_digest__doc__,
"Return the digest value as a string of binary data.");
static PyObject *
SH_digest(SHobject *self, PyObject *unused)
{
uchar digest[64];
SHobject temp;
sh_copy(self, &temp);
sh_final(&temp, digest);
return PyString_FromStringAndSize((const char *)digest, self->n);
}
PyDoc_STRVAR(SH_hexdigest__doc__,
"Return the digest value as a string of hexadecimal digits.");
static PyObject *
SH_hexdigest(SHobject *self, PyObject *unused)
{
uchar digest[64];
SHobject temp;
PyObject *retval;
char *hex_digest;
int i, j;
/* Get the raw (binary) digest value */
sh_copy(self, &temp);
sh_final(&temp, digest);
/* Create a new string */
retval = PyString_FromStringAndSize(NULL, self->n * 2);
if (!retval)
return NULL;
hex_digest = PyString_AsString(retval);
if (!hex_digest) {
Py_DECREF(retval);
return NULL;
}
/* Make hex version of the digest */
for (i=j=0; i<self->n; i++) {
char c;
c = (digest[i] >> 4) & 0xf;
c = (c>9) ? c+'a'-10 : c + '0';
hex_digest[j++] = c;
c = (digest[i] & 0xf);
c = (c>9) ? c+'a'-10 : c + '0';
hex_digest[j++] = c;
}
return retval;
}
PyDoc_STRVAR(SH_update__doc__,
"Update this hash object's state with the provided string.");
static PyObject *
SH_update(SHobject *self, PyObject *args)
{
uchar *cp;
int len;
if (!PyArg_ParseTuple(args, "s#:update", &cp, &len))
return NULL;
sh_update(self, cp, len);
Py_INCREF(Py_None);
return Py_None;
}
static PyMethodDef SH_methods[] = {
{"copy", (PyCFunction)SH_copy, METH_NOARGS, SH_copy__doc__},
{"digest", (PyCFunction)SH_digest, METH_NOARGS, SH_digest__doc__},
{"hexdigest", (PyCFunction)SH_hexdigest, METH_NOARGS, SH_hexdigest__doc__},
{"update", (PyCFunction)SH_update, METH_VARARGS, SH_update__doc__},
{NULL, NULL}
};
static PyObject *
SH_get_block_size(PyObject *self, void *closure)
{
return PyInt_FromLong(((SHobject*)self)->b);
}
static PyObject *
SH_get_name(PyObject *self, void *closure)
{
char *s = ((SHobject*)self)->t;
return PyString_FromStringAndSize(s, strlen(s));
}
static PyGetSetDef SH_getseters[] = {
{"block_size", (getter)SH_get_block_size, NULL, NULL, NULL},
{"name", (getter)SH_get_name, NULL, NULL, NULL},
{NULL}
};
static PyMemberDef SH_members[] = {
{"digest_size", T_INT, offsetof(SHobject, n), READONLY, NULL},
{"digestsize", T_INT, offsetof(SHobject, n), READONLY, NULL},
{NULL}
};
static PyTypeObject MD5type = {PyObject_HEAD_INIT(NULL)0,"_sechash.md5",sizeof(SHobject),0,sh_dealloc,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,Py_TPFLAGS_DEFAULT,0,0,0,0,0,0,0,SH_methods,SH_members,SH_getseters};
static PyTypeObject SHA1type = {PyObject_HEAD_INIT(NULL)0,"_sechash.sha1",sizeof(SHobject),0,sh_dealloc,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,Py_TPFLAGS_DEFAULT,0,0,0,0,0,0,0,SH_methods,SH_members,SH_getseters};
static PyTypeObject SHA224type = {PyObject_HEAD_INIT(NULL)0,"_sechash.sha224",sizeof(SHobject),0,sh_dealloc,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,Py_TPFLAGS_DEFAULT,0,0,0,0,0,0,0,SH_methods,SH_members,SH_getseters};
static PyTypeObject SHA256type = {PyObject_HEAD_INIT(NULL)0,"_sechash.sha256",sizeof(SHobject),0,sh_dealloc,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,Py_TPFLAGS_DEFAULT,0,0,0,0,0,0,0,SH_methods,SH_members,SH_getseters};
static PyTypeObject SHA384type = {PyObject_HEAD_INIT(NULL)0,"_sechash.sha384",sizeof(SHobject),0,sh_dealloc,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,Py_TPFLAGS_DEFAULT,0,0,0,0,0,0,0,SH_methods,SH_members,SH_getseters};
static PyTypeObject SHA512type = {PyObject_HEAD_INIT(NULL)0,"_sechash.sha512",sizeof(SHobject),0,sh_dealloc,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,Py_TPFLAGS_DEFAULT,0,0,0,0,0,0,0,SH_methods,SH_members,SH_getseters};
PyDoc_STRVAR(SHA512_new__doc__,
"Return a new SHA-512 hash object; optionally initialized with a string.");
static PyObject *
SHA512_new(PyObject *self, PyObject *args, PyObject *kwdict)
{
static char *kwlist[] = {"string", NULL};
SHobject *new;
uchar *cp = NULL;
int len;
if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|s#:new", kwlist, &cp, &len))
return NULL;
if ((new = (SHobject *)PyObject_New(SHobject, &SHA512type)) == NULL)
return NULL;
memset(&new->s, 0, sizeof(new->s));
new->t = "SHA512";
new->b = 128;
new->n = SHA2_512dlen;
new->f = sha2_512;
if (cp)
sh_update(new, cp, len);
return (PyObject *)new;
}
PyDoc_STRVAR(SHA384_new__doc__,
"Return a new SHA-384 hash object; optionally initialized with a string.");
static PyObject *
SHA384_new(PyObject *self, PyObject *args, PyObject *kwdict)
{
static char *kwlist[] = {"string", NULL};
SHobject *new;
uchar *cp = NULL;
int len;
if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|s#:new", kwlist, &cp, &len))
return NULL;
if ((new = (SHobject *)PyObject_New(SHobject, &SHA384type)) == NULL)
return NULL;
memset(&new->s, 0, sizeof(new->s));
new->t = "SHA384";
new->b = 128;
new->n = SHA2_384dlen;
new->f = sha2_384;
if (cp)
sh_update(new, cp, len);
return (PyObject *)new;
}
PyDoc_STRVAR(SHA256_new__doc__,
"Return a new SHA-256 hash object; optionally initialized with a string.");
static PyObject *
SHA256_new(PyObject *self, PyObject *args, PyObject *kwdict)
{
static char *kwlist[] = {"string", NULL};
SHobject *new;
uchar *cp = NULL;
int len;
if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|s#:new", kwlist, &cp, &len))
return NULL;
if ((new = (SHobject *)PyObject_New(SHobject, &SHA256type)) == NULL)
return NULL;
memset(&new->s, 0, sizeof(new->s));
new->t = "SHA256";
new->b = 64;
new->n = SHA2_256dlen;
new->f = sha2_256;
if (cp)
sh_update(new, cp, len);
return (PyObject *)new;
}
PyDoc_STRVAR(SHA224_new__doc__,
"Return a new SHA-224 hash object; optionally initialized with a string.");
static PyObject *
SHA224_new(PyObject *self, PyObject *args, PyObject *kwdict)
{
static char *kwlist[] = {"string", NULL};
SHobject *new;
uchar *cp = NULL;
int len;
if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|s#:new", kwlist, &cp, &len))
return NULL;
if ((new = (SHobject *)PyObject_New(SHobject, &SHA224type)) == NULL)
return NULL;
memset(&new->s, 0, sizeof(new->s));
new->t = "SHA224";
new->b = 64;
new->n = SHA2_224dlen;
new->f = sha2_224;
if (cp)
sh_update(new, cp, len);
return (PyObject *)new;
}
PyDoc_STRVAR(SHA1_new__doc__,
"Return a new SHA1 hash object; optionally initialized with a string.");
static PyObject *
SHA1_new(PyObject *self, PyObject *args, PyObject *kwdict)
{
static char *kwlist[] = {"string", NULL};
SHobject *new;
uchar *cp = NULL;
int len;
if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|s#:new", kwlist, &cp, &len))
return NULL;
if ((new = (SHobject *)PyObject_New(SHobject, &SHA1type)) == NULL)
return NULL;
memset(&new->s, 0, sizeof(new->s));
new->t = "SHA1";
new->b = 64;
new->n = SHA1dlen;
new->f = sha1;
if (cp)
sh_update(new, cp, len);
return (PyObject *)new;
}
PyDoc_STRVAR(MD5_new__doc__,
"Return a new MD5 hash object; optionally initialized with a string.");
static PyObject *
MD5_new(PyObject *self, PyObject *args, PyObject *kwdict)
{
static char *kwlist[] = {"string", NULL};
SHobject *new;
uchar *cp = NULL;
int len;
if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|s#:new", kwlist, &cp, &len))
return NULL;
if ((new = (SHobject *)PyObject_New(SHobject, &MD5type)) == NULL)
return NULL;
memset(&new->s, 0, sizeof(new->s));
new->t = "MD5";
new->b = 16;
new->n = MD5dlen;
new->f = md5;
if (cp)
sh_update(new, cp, len);
return (PyObject *)new;
}
/* List of functions exported by this module */
static struct PyMethodDef SH_functions[] = {
{"sha512", (PyCFunction)SHA512_new, METH_VARARGS|METH_KEYWORDS, SHA512_new__doc__},
{"sha384", (PyCFunction)SHA384_new, METH_VARARGS|METH_KEYWORDS, SHA384_new__doc__},
{"sha256", (PyCFunction)SHA256_new, METH_VARARGS|METH_KEYWORDS, SHA256_new__doc__},
{"sha224", (PyCFunction)SHA224_new, METH_VARARGS|METH_KEYWORDS, SHA224_new__doc__},
{"sha1", (PyCFunction)SHA1_new, METH_VARARGS|METH_KEYWORDS, SHA1_new__doc__},
{"md5", (PyCFunction)MD5_new, METH_VARARGS|METH_KEYWORDS, MD5_new__doc__},
{NULL, NULL} /* Sentinel */
};
PyMODINIT_FUNC
init_sechash(void)
{
MD5type.ob_type = &PyType_Type;
if (PyType_Ready(&MD5type) < 0)
return;
SHA1type.ob_type = &PyType_Type;
if (PyType_Ready(&SHA1type) < 0)
return;
SHA224type.ob_type = &PyType_Type;
if (PyType_Ready(&SHA224type) < 0)
return;
SHA256type.ob_type = &PyType_Type;
if (PyType_Ready(&SHA256type) < 0)
return;
SHA384type.ob_type = &PyType_Type;
if (PyType_Ready(&SHA384type) < 0)
return;
SHA512type.ob_type = &PyType_Type;
if (PyType_Ready(&SHA512type) < 0)
return;
Py_InitModule("_sechash", SH_functions);
}