--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Modules/_hashopenssl.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,519 @@
+/* Module that wraps all OpenSSL hash algorithms */
+
+/*
+ * Copyright (C) 2005 Gregory P. Smith (greg@krypto.org)
+ * Licensed to PSF under a Contributor Agreement.
+ *
+ * Derived from a skeleton of shamodule.c containing work performed by:
+ *
+ * Andrew Kuchling (amk@amk.ca)
+ * Greg Stein (gstein@lyra.org)
+ *
+ */
+
+#define PY_SSIZE_T_CLEAN
+
+#include "Python.h"
+#include "structmember.h"
+
+/* EVP is the preferred interface to hashing in OpenSSL */
+#include <openssl/evp.h>
+
+#define MUNCH_SIZE INT_MAX
+
+
+#ifndef HASH_OBJ_CONSTRUCTOR
+#define HASH_OBJ_CONSTRUCTOR 0
+#endif
+
+typedef struct {
+ PyObject_HEAD
+ PyObject *name; /* name of this hash algorithm */
+ EVP_MD_CTX ctx; /* OpenSSL message digest context */
+} EVPobject;
+
+
+static PyTypeObject EVPtype;
+
+
+#define DEFINE_CONSTS_FOR_NEW(Name) \
+ static PyObject *CONST_ ## Name ## _name_obj; \
+ static EVP_MD_CTX CONST_new_ ## Name ## _ctx; \
+ static EVP_MD_CTX *CONST_new_ ## Name ## _ctx_p = NULL;
+
+DEFINE_CONSTS_FOR_NEW(md5)
+DEFINE_CONSTS_FOR_NEW(sha1)
+DEFINE_CONSTS_FOR_NEW(sha224)
+DEFINE_CONSTS_FOR_NEW(sha256)
+DEFINE_CONSTS_FOR_NEW(sha384)
+DEFINE_CONSTS_FOR_NEW(sha512)
+
+
+static EVPobject *
+newEVPobject(PyObject *name)
+{
+ EVPobject *retval = (EVPobject *)PyObject_New(EVPobject, &EVPtype);
+
+ /* save the name for .name to return */
+ if (retval != NULL) {
+ Py_INCREF(name);
+ retval->name = name;
+ }
+
+ return retval;
+}
+
+/* Internal methods for a hash object */
+
+static void
+EVP_dealloc(PyObject *ptr)
+{
+ EVP_MD_CTX_cleanup(&((EVPobject *)ptr)->ctx);
+ Py_XDECREF(((EVPobject *)ptr)->name);
+ PyObject_Del(ptr);
+}
+
+
+/* External methods for a hash object */
+
+PyDoc_STRVAR(EVP_copy__doc__, "Return a copy of the hash object.");
+
+static PyObject *
+EVP_copy(EVPobject *self, PyObject *unused)
+{
+ EVPobject *newobj;
+
+ if ( (newobj = newEVPobject(self->name))==NULL)
+ return NULL;
+
+ EVP_MD_CTX_copy(&newobj->ctx, &self->ctx);
+ return (PyObject *)newobj;
+}
+
+PyDoc_STRVAR(EVP_digest__doc__,
+"Return the digest value as a string of binary data.");
+
+static PyObject *
+EVP_digest(EVPobject *self, PyObject *unused)
+{
+ unsigned char digest[EVP_MAX_MD_SIZE];
+ EVP_MD_CTX temp_ctx;
+ PyObject *retval;
+ unsigned int digest_size;
+
+ EVP_MD_CTX_copy(&temp_ctx, &self->ctx);
+ digest_size = EVP_MD_CTX_size(&temp_ctx);
+ EVP_DigestFinal(&temp_ctx, digest, NULL);
+
+ retval = PyString_FromStringAndSize((const char *)digest, digest_size);
+ EVP_MD_CTX_cleanup(&temp_ctx);
+ return retval;
+}
+
+PyDoc_STRVAR(EVP_hexdigest__doc__,
+"Return the digest value as a string of hexadecimal digits.");
+
+static PyObject *
+EVP_hexdigest(EVPobject *self, PyObject *unused)
+{
+ unsigned char digest[EVP_MAX_MD_SIZE];
+ EVP_MD_CTX temp_ctx;
+ PyObject *retval;
+ char *hex_digest;
+ unsigned int i, j, digest_size;
+
+ /* Get the raw (binary) digest value */
+ EVP_MD_CTX_copy(&temp_ctx, &self->ctx);
+ digest_size = EVP_MD_CTX_size(&temp_ctx);
+ EVP_DigestFinal(&temp_ctx, digest, NULL);
+
+ EVP_MD_CTX_cleanup(&temp_ctx);
+
+ /* Create a new string */
+ /* NOTE: not thread safe! modifying an already created string object */
+ /* (not a problem because we hold the GIL by default) */
+ retval = PyString_FromStringAndSize(NULL, digest_size * 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<digest_size; 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(EVP_update__doc__,
+"Update this hash object's state with the provided string.");
+
+static PyObject *
+EVP_update(EVPobject *self, PyObject *args)
+{
+ unsigned char *cp;
+ Py_ssize_t len;
+
+ if (!PyArg_ParseTuple(args, "s#:update", &cp, &len))
+ return NULL;
+
+ if (len > 0 && len <= MUNCH_SIZE) {
+ EVP_DigestUpdate(&self->ctx, cp, Py_SAFE_DOWNCAST(len, Py_ssize_t,
+ unsigned int));
+ } else {
+ Py_ssize_t offset = 0;
+ while (len) {
+ unsigned int process = len > MUNCH_SIZE ? MUNCH_SIZE : len;
+ EVP_DigestUpdate(&self->ctx, cp + offset, process);
+ len -= process;
+ offset += process;
+ }
+ }
+ Py_INCREF(Py_None);
+ return Py_None;
+}
+
+static PyMethodDef EVP_methods[] = {
+ {"update", (PyCFunction)EVP_update, METH_VARARGS, EVP_update__doc__},
+ {"digest", (PyCFunction)EVP_digest, METH_NOARGS, EVP_digest__doc__},
+ {"hexdigest", (PyCFunction)EVP_hexdigest, METH_NOARGS, EVP_hexdigest__doc__},
+ {"copy", (PyCFunction)EVP_copy, METH_NOARGS, EVP_copy__doc__},
+ {NULL, NULL} /* sentinel */
+};
+
+static PyObject *
+EVP_get_block_size(EVPobject *self, void *closure)
+{
+ return PyInt_FromLong(EVP_MD_CTX_block_size(&((EVPobject *)self)->ctx));
+}
+
+static PyObject *
+EVP_get_digest_size(EVPobject *self, void *closure)
+{
+ return PyInt_FromLong(EVP_MD_CTX_size(&((EVPobject *)self)->ctx));
+}
+
+static PyMemberDef EVP_members[] = {
+ {"name", T_OBJECT, offsetof(EVPobject, name), READONLY, PyDoc_STR("algorithm name.")},
+ {NULL} /* Sentinel */
+};
+
+static PyGetSetDef EVP_getseters[] = {
+ {"digest_size",
+ (getter)EVP_get_digest_size, NULL,
+ NULL,
+ NULL},
+ {"block_size",
+ (getter)EVP_get_block_size, NULL,
+ NULL,
+ NULL},
+ /* the old md5 and sha modules support 'digest_size' as in PEP 247.
+ * the old sha module also supported 'digestsize'. ugh. */
+ {"digestsize",
+ (getter)EVP_get_digest_size, NULL,
+ NULL,
+ NULL},
+ {NULL} /* Sentinel */
+};
+
+
+static PyObject *
+EVP_repr(PyObject *self)
+{
+ char buf[100];
+ PyOS_snprintf(buf, sizeof(buf), "<%s HASH object @ %p>",
+ PyString_AsString(((EVPobject *)self)->name), self);
+ return PyString_FromString(buf);
+}
+
+#if HASH_OBJ_CONSTRUCTOR
+static int
+EVP_tp_init(EVPobject *self, PyObject *args, PyObject *kwds)
+{
+ static char *kwlist[] = {"name", "string", NULL};
+ PyObject *name_obj = NULL;
+ char *nameStr;
+ unsigned char *cp = NULL;
+ Py_ssize_t len = 0;
+ const EVP_MD *digest;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|s#:HASH", kwlist,
+ &name_obj, &cp, &len)) {
+ return -1;
+ }
+
+ if (!PyArg_Parse(name_obj, "s", &nameStr)) {
+ PyErr_SetString(PyExc_TypeError, "name must be a string");
+ return -1;
+ }
+
+ digest = EVP_get_digestbyname(nameStr);
+ if (!digest) {
+ PyErr_SetString(PyExc_ValueError, "unknown hash function");
+ return -1;
+ }
+ EVP_DigestInit(&self->ctx, digest);
+
+ self->name = name_obj;
+ Py_INCREF(self->name);
+
+ if (cp && len) {
+ if (len > 0 && len <= MUNCH_SIZE) {
+ EVP_DigestUpdate(&self->ctx, cp, Py_SAFE_DOWNCAST(len, Py_ssize_t,
+ unsigned int));
+ } else {
+ Py_ssize_t offset = 0;
+ while (len) {
+ unsigned int process = len > MUNCH_SIZE ? MUNCH_SIZE : len;
+ EVP_DigestUpdate(&self->ctx, cp + offset, process);
+ len -= process;
+ offset += process;
+ }
+ }
+ }
+
+ return 0;
+}
+#endif
+
+
+PyDoc_STRVAR(hashtype_doc,
+"A hash represents the object used to calculate a checksum of a\n\
+string of information.\n\
+\n\
+Methods:\n\
+\n\
+update() -- updates the current digest with an additional string\n\
+digest() -- return the current digest value\n\
+hexdigest() -- return the current digest as a string of hexadecimal digits\n\
+copy() -- return a copy of the current hash object\n\
+\n\
+Attributes:\n\
+\n\
+name -- the hash algorithm being used by this object\n\
+digest_size -- number of bytes in this hashes output\n");
+
+static PyTypeObject EVPtype = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_hashlib.HASH", /*tp_name*/
+ sizeof(EVPobject), /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ /* methods */
+ EVP_dealloc, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare*/
+ EVP_repr, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash*/
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
+ hashtype_doc, /*tp_doc*/
+ 0, /*tp_traverse*/
+ 0, /*tp_clear*/
+ 0, /*tp_richcompare*/
+ 0, /*tp_weaklistoffset*/
+ 0, /*tp_iter*/
+ 0, /*tp_iternext*/
+ EVP_methods, /* tp_methods */
+ EVP_members, /* tp_members */
+ EVP_getseters, /* tp_getset */
+#if 1
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+#endif
+#if HASH_OBJ_CONSTRUCTOR
+ (initproc)EVP_tp_init, /* tp_init */
+#endif
+};
+
+static PyObject *
+EVPnew(PyObject *name_obj,
+ const EVP_MD *digest, const EVP_MD_CTX *initial_ctx,
+ const unsigned char *cp, Py_ssize_t len)
+{
+ EVPobject *self;
+
+ if (!digest && !initial_ctx) {
+ PyErr_SetString(PyExc_ValueError, "unsupported hash type");
+ return NULL;
+ }
+
+ if ((self = newEVPobject(name_obj)) == NULL)
+ return NULL;
+
+ if (initial_ctx) {
+ EVP_MD_CTX_copy(&self->ctx, initial_ctx);
+ } else {
+ EVP_DigestInit(&self->ctx, digest);
+ }
+
+ if (cp && len) {
+ if (len > 0 && len <= MUNCH_SIZE) {
+ EVP_DigestUpdate(&self->ctx, cp, Py_SAFE_DOWNCAST(len, Py_ssize_t,
+ unsigned int));
+ } else {
+ Py_ssize_t offset = 0;
+ while (len) {
+ unsigned int process = len > MUNCH_SIZE ? MUNCH_SIZE : len;
+ EVP_DigestUpdate(&self->ctx, cp + offset, process);
+ len -= process;
+ offset += process;
+ }
+ }
+ }
+
+ return (PyObject *)self;
+}
+
+
+/* The module-level function: new() */
+
+PyDoc_STRVAR(EVP_new__doc__,
+"Return a new hash object using the named algorithm.\n\
+An optional string argument may be provided and will be\n\
+automatically hashed.\n\
+\n\
+The MD5 and SHA1 algorithms are always supported.\n");
+
+static PyObject *
+EVP_new(PyObject *self, PyObject *args, PyObject *kwdict)
+{
+ static char *kwlist[] = {"name", "string", NULL};
+ PyObject *name_obj = NULL;
+ char *name;
+ const EVP_MD *digest;
+ unsigned char *cp = NULL;
+ Py_ssize_t len = 0;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwdict, "O|s#:new", kwlist,
+ &name_obj, &cp, &len)) {
+ return NULL;
+ }
+
+ if (!PyArg_Parse(name_obj, "s", &name)) {
+ PyErr_SetString(PyExc_TypeError, "name must be a string");
+ return NULL;
+ }
+
+ digest = EVP_get_digestbyname(name);
+
+ return EVPnew(name_obj, digest, NULL, cp, len);
+}
+
+/*
+ * This macro generates constructor function definitions for specific
+ * hash algorithms. These constructors are much faster than calling
+ * the generic one passing it a python string and are noticably
+ * faster than calling a python new() wrapper. Thats important for
+ * code that wants to make hashes of a bunch of small strings.
+ */
+#define GEN_CONSTRUCTOR(NAME) \
+ static PyObject * \
+ EVP_new_ ## NAME (PyObject *self, PyObject *args) \
+ { \
+ unsigned char *cp = NULL; \
+ Py_ssize_t len = 0; \
+ \
+ if (!PyArg_ParseTuple(args, "|s#:" #NAME , &cp, &len)) { \
+ return NULL; \
+ } \
+ \
+ return EVPnew( \
+ CONST_ ## NAME ## _name_obj, \
+ NULL, \
+ CONST_new_ ## NAME ## _ctx_p, \
+ cp, len); \
+ }
+
+/* a PyMethodDef structure for the constructor */
+#define CONSTRUCTOR_METH_DEF(NAME) \
+ {"openssl_" #NAME, (PyCFunction)EVP_new_ ## NAME, METH_VARARGS, \
+ PyDoc_STR("Returns a " #NAME \
+ " hash object; optionally initialized with a string") \
+ }
+
+/* used in the init function to setup a constructor */
+#define INIT_CONSTRUCTOR_CONSTANTS(NAME) do { \
+ CONST_ ## NAME ## _name_obj = PyString_FromString(#NAME); \
+ if (EVP_get_digestbyname(#NAME)) { \
+ CONST_new_ ## NAME ## _ctx_p = &CONST_new_ ## NAME ## _ctx; \
+ EVP_DigestInit(CONST_new_ ## NAME ## _ctx_p, EVP_get_digestbyname(#NAME)); \
+ } \
+} while (0);
+
+GEN_CONSTRUCTOR(md5)
+GEN_CONSTRUCTOR(sha1)
+GEN_CONSTRUCTOR(sha224)
+GEN_CONSTRUCTOR(sha256)
+GEN_CONSTRUCTOR(sha384)
+GEN_CONSTRUCTOR(sha512)
+
+/* List of functions exported by this module */
+
+static struct PyMethodDef EVP_functions[] = {
+ {"new", (PyCFunction)EVP_new, METH_VARARGS|METH_KEYWORDS, EVP_new__doc__},
+ CONSTRUCTOR_METH_DEF(md5),
+ CONSTRUCTOR_METH_DEF(sha1),
+ CONSTRUCTOR_METH_DEF(sha224),
+ CONSTRUCTOR_METH_DEF(sha256),
+ CONSTRUCTOR_METH_DEF(sha384),
+ CONSTRUCTOR_METH_DEF(sha512),
+ {NULL, NULL} /* Sentinel */
+};
+
+
+/* Initialize this module. */
+
+PyMODINIT_FUNC
+init_hashlib(void)
+{
+ PyObject *m;
+
+ OpenSSL_add_all_digests();
+
+ /* TODO build EVP_functions openssl_* entries dynamically based
+ * on what hashes are supported rather than listing many
+ * but having some be unsupported. Only init appropriate
+ * constants. */
+
+ Py_TYPE(&EVPtype) = &PyType_Type;
+ if (PyType_Ready(&EVPtype) < 0)
+ return;
+
+ m = Py_InitModule("_hashlib", EVP_functions);
+ if (m == NULL)
+ return;
+
+#if HASH_OBJ_CONSTRUCTOR
+ Py_INCREF(&EVPtype);
+ PyModule_AddObject(m, "HASH", (PyObject *)&EVPtype);
+#endif
+
+ /* these constants are used by the convenience constructors */
+ INIT_CONSTRUCTOR_CONSTANTS(md5);
+ INIT_CONSTRUCTOR_CONSTANTS(sha1);
+ INIT_CONSTRUCTOR_CONSTANTS(sha224);
+ INIT_CONSTRUCTOR_CONSTANTS(sha256);
+ INIT_CONSTRUCTOR_CONSTANTS(sha384);
+ INIT_CONSTRUCTOR_CONSTANTS(sha512);
+}