1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
--- Modules/_hashopenssl.c.orig 2006-05-29 22:04:52.000000000 +0100
+++ Modules/_hashopenssl.c 2008-08-30 10:43:27.000000000 +0100
@@ -19,6 +19,8 @@
/* 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
@@ -164,9 +166,18 @@
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;
}
@@ -255,9 +266,20 @@
self->name = name_obj;
Py_INCREF(self->name);
- if (cp && len)
+ 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;
}
@@ -328,7 +350,7 @@
static PyObject *
EVPnew(PyObject *name_obj,
const EVP_MD *digest, const EVP_MD_CTX *initial_ctx,
- const unsigned char *cp, unsigned int len)
+ const unsigned char *cp, Py_ssize_t len)
{
EVPobject *self;
@@ -346,8 +368,20 @@
EVP_DigestInit(&self->ctx, digest);
}
- if (cp && len)
- EVP_DigestUpdate(&self->ctx, cp, len);
+ 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;
}
@@ -384,8 +418,7 @@
digest = EVP_get_digestbyname(name);
- return EVPnew(name_obj, digest, NULL, cp, Py_SAFE_DOWNCAST(len, Py_ssize_t,
- unsigned int));
+ return EVPnew(name_obj, digest, NULL, cp, len);
}
/*
@@ -410,7 +443,7 @@
CONST_ ## NAME ## _name_obj, \
NULL, \
CONST_new_ ## NAME ## _ctx_p, \
- cp, Py_SAFE_DOWNCAST(len, Py_ssize_t, unsigned int)); \
+ cp, len); \
}
/* a PyMethodDef structure for the constructor */
|
