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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
diff --git a/library/entropy_poll.c b/library/entropy_poll.c
index 67900c46c8..cefe882d2a 100644
--- a/library/entropy_poll.c
+++ b/library/entropy_poll.c
@@ -54,28 +54,43 @@
#define _WIN32_WINNT 0x0400
#endif
#include <windows.h>
-#include <wincrypt.h>
+#include <bcrypt.h>
+#if defined(_MSC_VER) && _MSC_VER <= 1600
+/* Visual Studio 2010 and earlier issue a warning when both <stdint.h> and
+ * <intsafe.h> are included, as they redefine a number of <TYPE>_MAX constants.
+ * These constants are guaranteed to be the same, though, so we suppress the
+ * warning when including intsafe.h.
+ */
+#pragma warning( push )
+#pragma warning( disable : 4005 )
+#endif
+#include <intsafe.h>
+#if defined(_MSC_VER) && _MSC_VER <= 1600
+#pragma warning( pop )
+#endif
int mbedtls_platform_entropy_poll( void *data, unsigned char *output, size_t len,
size_t *olen )
{
- HCRYPTPROV provider;
+ ULONG len_as_ulong = 0;
((void) data);
*olen = 0;
- if( CryptAcquireContext( &provider, NULL, NULL,
- PROV_RSA_FULL, CRYPT_VERIFYCONTEXT ) == FALSE )
+ /*
+ * BCryptGenRandom takes ULONG for size, which is smaller than size_t on
+ * 64-bit Windows platforms. Ensure len's value can be safely converted into
+ * a ULONG.
+ */
+ if ( FAILED( SizeTToULong( len, &len_as_ulong ) ) )
{
return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
}
- if( CryptGenRandom( provider, (DWORD) len, output ) == FALSE )
+ if ( !BCRYPT_SUCCESS( BCryptGenRandom( NULL, output, len_as_ulong, BCRYPT_USE_SYSTEM_PREFERRED_RNG ) ) )
{
- CryptReleaseContext( provider, 0 );
return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
}
- CryptReleaseContext( provider, 0 );
*olen = len;
return( 0 );
diff --git a/library/x509_crt.c b/library/x509_crt.c
index 290c1eb3d1..3cf1743821 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -65,6 +65,19 @@
#if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
#include <windows.h>
+#if defined(_MSC_VER) && _MSC_VER <= 1600
+/* Visual Studio 2010 and earlier issue a warning when both <stdint.h> and
+ * <intsafe.h> are included, as they redefine a number of <TYPE>_MAX constants.
+ * These constants are guaranteed to be the same, though, so we suppress the
+ * warning when including intsafe.h.
+ */
+#pragma warning( push )
+#pragma warning( disable : 4005 )
+#endif
+#include <intsafe.h>
+#if defined(_MSC_VER) && _MSC_VER <= 1600
+#pragma warning( pop )
+#endif
#else
#include <time.h>
#endif
@@ -1126,6 +1139,7 @@ int mbedtls_x509_crt_parse_path( mbedtls_x509_crt *chain, const char *path )
char filename[MAX_PATH];
char *p;
size_t len = strlen( path );
+ int length_as_int = 0;
WIN32_FIND_DATAW file_data;
HANDLE hFind;
@@ -1140,7 +1154,18 @@ int mbedtls_x509_crt_parse_path( mbedtls_x509_crt *chain, const char *path )
p = filename + len;
filename[len++] = '*';
- w_ret = MultiByteToWideChar( CP_ACP, 0, filename, (int)len, szDir,
+ if ( FAILED ( SizeTToInt( len, &length_as_int ) ) )
+ return( MBEDTLS_ERR_X509_FILE_IO_ERROR );
+
+ /*
+ * Note this function uses the code page CP_ACP, and assumes the incoming
+ * string is encoded in ANSI, before translating it into Unicode. If the
+ * incoming string were changed to be UTF-8, then the length check needs to
+ * change to check the number of characters, not the number of bytes, in the
+ * incoming string are less than MAX_PATH to avoid a buffer overrun with
+ * MultiByteToWideChar().
+ */
+ w_ret = MultiByteToWideChar( CP_ACP, 0, filename, length_as_int, szDir,
MAX_PATH - 3 );
if( w_ret == 0 )
return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
@@ -1157,8 +1182,11 @@ int mbedtls_x509_crt_parse_path( mbedtls_x509_crt *chain, const char *path )
if( file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY )
continue;
+ if ( FAILED( SizeTToInt( wcslen( file_data.cFileName ), &length_as_int ) ) )
+ return( MBEDTLS_ERR_X509_FILE_IO_ERROR );
+
w_ret = WideCharToMultiByte( CP_ACP, 0, file_data.cFileName,
- lstrlenW( file_data.cFileName ),
+ length_as_int,
p, (int) len - 1,
NULL, NULL );
if( w_ret == 0 )
|