Mercurial > cpython-lru_cache-weakref

annotate Python/random.c @ 78758:ca4bf8e10bc0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Issue #15316: Let exceptions raised during imports triggered by the fromlist of __import__ propagate. The problem previously was that if something listed in fromlist didn't exist then that's okay. The fix for that was too broad in terms of catching ImportError. The trick with the solution to this issue is that the proper refactoring of import thanks to importlib doesn't allow for a way to distinguish (portably) between an ImportError because finders couldn't find a loader, or a loader raised the exception. In Python 3.4 the hope is to introduce a new exception (e.g. ModuleNotFound) to make it clean to differentiate why ImportError was raised.
author Brett Cannon <brett@python.org>
date Fri, 24 Aug 2012 18:25:59 -0400
parents 198e31774f0f
children 6a782496f90a a53fc9982e2a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
75066
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
1 #include "Python.h"
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
2 #ifdef MS_WINDOWS
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
3 #include <windows.h>
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
4 #else
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
5 #include <fcntl.h>
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
6 #endif
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
7
75127
160a56eac332 ensure no one tries to hash things before the random seed is found
Benjamin Peterson <benjamin@python.org>
parents: 75087
diff changeset
8 #ifdef Py_DEBUG
160a56eac332 ensure no one tries to hash things before the random seed is found
Benjamin Peterson <benjamin@python.org>
parents: 75087
diff changeset
9 int _Py_HashSecret_Initialized = 0;
160a56eac332 ensure no one tries to hash things before the random seed is found
Benjamin Peterson <benjamin@python.org>
parents: 75087
diff changeset
10 #else
160a56eac332 ensure no one tries to hash things before the random seed is found
Benjamin Peterson <benjamin@python.org>
parents: 75087
diff changeset
11 static int _Py_HashSecret_Initialized = 0;
160a56eac332 ensure no one tries to hash things before the random seed is found
Benjamin Peterson <benjamin@python.org>
parents: 75087
diff changeset
12 #endif
75066
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
13
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
14 #ifdef MS_WINDOWS
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
15 typedef BOOL (WINAPI *CRYPTACQUIRECONTEXTA)(HCRYPTPROV *phProv,\
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
16 LPCSTR pszContainer, LPCSTR pszProvider, DWORD dwProvType,\
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
17 DWORD dwFlags );
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
18 typedef BOOL (WINAPI *CRYPTGENRANDOM)(HCRYPTPROV hProv, DWORD dwLen,\
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
19 BYTE *pbBuffer );
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
20
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
21 static CRYPTGENRANDOM pCryptGenRandom = NULL;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
22 /* This handle is never explicitly released. Instead, the operating
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
23 system will release it when the process terminates. */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
24 static HCRYPTPROV hCryptProv = 0;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
25
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
26 static int
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
27 win32_urandom_init(int raise)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
28 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
29 HINSTANCE hAdvAPI32 = NULL;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
30 CRYPTACQUIRECONTEXTA pCryptAcquireContext = NULL;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
31
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
32 /* Obtain handle to the DLL containing CryptoAPI. This should not fail. */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
33 hAdvAPI32 = GetModuleHandle("advapi32.dll");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
34 if(hAdvAPI32 == NULL)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
35 goto error;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
36
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
37 /* Obtain pointers to the CryptoAPI functions. This will fail on some early
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
38 versions of Win95. */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
39 pCryptAcquireContext = (CRYPTACQUIRECONTEXTA)GetProcAddress(
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
40 hAdvAPI32, "CryptAcquireContextA");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
41 if (pCryptAcquireContext == NULL)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
42 goto error;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
43
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
44 pCryptGenRandom = (CRYPTGENRANDOM)GetProcAddress(hAdvAPI32,
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
45 "CryptGenRandom");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
46 if (pCryptGenRandom == NULL)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
47 goto error;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
48
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
49 /* Acquire context */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
50 if (! pCryptAcquireContext(&hCryptProv, NULL, NULL,
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
51 PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
52 goto error;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
53
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
54 return 0;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
55
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
56 error:
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
57 if (raise)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
58 PyErr_SetFromWindowsErr(0);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
59 else
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
60 Py_FatalError("Failed to initialize Windows random API (CryptoGen)");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
61 return -1;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
62 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
63
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
64 /* Fill buffer with size pseudo-random bytes generated by the Windows CryptoGen
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
65 API. Return 0 on success, or -1 on error. */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
66 static int
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
67 win32_urandom(unsigned char *buffer, Py_ssize_t size, int raise)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
68 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
69 Py_ssize_t chunk;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
70
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
71 if (hCryptProv == 0)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
72 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
73 if (win32_urandom_init(raise) == -1)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
74 return -1;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
75 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
76
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
77 while (size > 0)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
78 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
79 chunk = size > INT_MAX ? INT_MAX : size;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
80 if (!pCryptGenRandom(hCryptProv, chunk, buffer))
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
81 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
82 /* CryptGenRandom() failed */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
83 if (raise)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
84 PyErr_SetFromWindowsErr(0);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
85 else
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
86 Py_FatalError("Failed to initialized the randomized hash "
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
87 "secret using CryptoGen)");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
88 return -1;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
89 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
90 buffer += chunk;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
91 size -= chunk;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
92 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
93 return 0;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
94 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
95 #endif /* MS_WINDOWS */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
96
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
97
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
98 #ifdef __VMS
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
99 /* Use openssl random routine */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
100 #include <openssl/rand.h>
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
101 static int
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
102 vms_urandom(unsigned char *buffer, Py_ssize_t size, int raise)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
103 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
104 if (RAND_pseudo_bytes(buffer, size) < 0) {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
105 if (raise) {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
106 PyErr_Format(PyExc_ValueError,
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
107 "RAND_pseudo_bytes");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
108 } else {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
109 Py_FatalError("Failed to initialize the randomized hash "
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
110 "secret using RAND_pseudo_bytes");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
111 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
112 return -1;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
113 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
114 return 0;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
115 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
116 #endif /* __VMS */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
117
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
118
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
119 #if !defined(MS_WINDOWS) && !defined(__VMS)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
120
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
121 /* Read size bytes from /dev/urandom into buffer.
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
122 Call Py_FatalError() on error. */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
123 static void
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
124 dev_urandom_noraise(char *buffer, Py_ssize_t size)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
125 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
126 int fd;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
127 Py_ssize_t n;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
128
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
129 assert (0 < size);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
130
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
131 fd = open("/dev/urandom", O_RDONLY);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
132 if (fd < 0)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
133 Py_FatalError("Failed to open /dev/urandom");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
134
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
135 while (0 < size)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
136 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
137 do {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
138 n = read(fd, buffer, (size_t)size);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
139 } while (n < 0 && errno == EINTR);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
140 if (n <= 0)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
141 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
142 /* stop on error or if read(size) returned 0 */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
143 Py_FatalError("Failed to read bytes from /dev/urandom");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
144 break;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
145 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
146 buffer += n;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
147 size -= (Py_ssize_t)n;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
148 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
149 close(fd);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
150 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
151
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
152 /* Read size bytes from /dev/urandom into buffer.
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
153 Return 0 on success, raise an exception and return -1 on error. */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
154 static int
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
155 dev_urandom_python(char *buffer, Py_ssize_t size)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
156 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
157 int fd;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
158 Py_ssize_t n;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
159
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
160 if (size <= 0)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
161 return 0;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
162
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
163 Py_BEGIN_ALLOW_THREADS
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
164 fd = open("/dev/urandom", O_RDONLY);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
165 Py_END_ALLOW_THREADS
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
166 if (fd < 0)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
167 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
168 PyErr_SetFromErrnoWithFilename(PyExc_OSError, "/dev/urandom");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
169 return -1;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
170 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
171
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
172 Py_BEGIN_ALLOW_THREADS
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
173 do {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
174 do {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
175 n = read(fd, buffer, (size_t)size);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
176 } while (n < 0 && errno == EINTR);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
177 if (n <= 0)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
178 break;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
179 buffer += n;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
180 size -= (Py_ssize_t)n;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
181 } while (0 < size);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
182 Py_END_ALLOW_THREADS
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
183
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
184 if (n <= 0)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
185 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
186 /* stop on error or if read(size) returned 0 */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
187 if (n < 0)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
188 PyErr_SetFromErrno(PyExc_OSError);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
189 else
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
190 PyErr_Format(PyExc_RuntimeError,
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
191 "Failed to read %zi bytes from /dev/urandom",
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
192 size);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
193 close(fd);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
194 return -1;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
195 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
196 close(fd);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
197 return 0;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
198 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
199 #endif /* !defined(MS_WINDOWS) && !defined(__VMS) */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
200
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
201 /* Fill buffer with pseudo-random bytes generated by a linear congruent
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
202 generator (LCG):
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
203
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
204 x(n+1) = (x(n) * 214013 + 2531011) % 2^32
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
205
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
206 Use bits 23..16 of x(n) to generate a byte. */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
207 static void
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
208 lcg_urandom(unsigned int x0, unsigned char *buffer, size_t size)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
209 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
210 size_t index;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
211 unsigned int x;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
212
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
213 x = x0;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
214 for (index=0; index < size; index++) {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
215 x *= 214013;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
216 x += 2531011;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
217 /* modulo 2 ^ (8 * sizeof(int)) */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
218 buffer[index] = (x >> 16) & 0xff;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
219 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
220 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
221
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
222 /* Fill buffer with size pseudo-random bytes, not suitable for cryptographic
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
223 use, from the operating random number generator (RNG).
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
224
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
225 Return 0 on success, raise an exception and return -1 on error. */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
226 int
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
227 _PyOS_URandom(void *buffer, Py_ssize_t size)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
228 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
229 if (size < 0) {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
230 PyErr_Format(PyExc_ValueError,
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
231 "negative argument not allowed");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
232 return -1;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
233 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
234 if (size == 0)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
235 return 0;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
236
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
237 #ifdef MS_WINDOWS
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
238 return win32_urandom((unsigned char *)buffer, size, 1);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
239 #else
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
240 # ifdef __VMS
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
241 return vms_urandom((unsigned char *)buffer, size, 1);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
242 # else
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
243 return dev_urandom_python((char*)buffer, size);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
244 # endif
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
245 #endif
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
246 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
247
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
248 void
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
249 _PyRandom_Init(void)
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
250 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
251 char *env;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
252 void *secret = &_Py_HashSecret;
75127
160a56eac332 ensure no one tries to hash things before the random seed is found
Benjamin Peterson <benjamin@python.org>
parents: 75087
diff changeset
253 Py_ssize_t secret_size = sizeof(_Py_HashSecret_t);
75066
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
254
75127
160a56eac332 ensure no one tries to hash things before the random seed is found
Benjamin Peterson <benjamin@python.org>
parents: 75087
diff changeset
255 if (_Py_HashSecret_Initialized)
75066
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
256 return;
75127
160a56eac332 ensure no one tries to hash things before the random seed is found
Benjamin Peterson <benjamin@python.org>
parents: 75087
diff changeset
257 _Py_HashSecret_Initialized = 1;
75066
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
258
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
259 /*
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
260 Hash randomization is enabled. Generate a per-process secret,
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
261 using PYTHONHASHSEED if provided.
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
262 */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
263
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
264 env = Py_GETENV("PYTHONHASHSEED");
75087
ab1886e7fc19 Fix typo in conditional.
Georg Brandl <georg@python.org>
parents: 75066
diff changeset
265 if (env && *env != '\0' && strcmp(env, "random") != 0) {
75066
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
266 char *endptr = env;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
267 unsigned long seed;
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
268 seed = strtoul(env, &endptr, 10);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
269 if (*endptr != '\0'
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
270 || seed > 4294967295UL
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
271 || (errno == ERANGE && seed == ULONG_MAX))
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
272 {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
273 Py_FatalError("PYTHONHASHSEED must be \"random\" or an integer "
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
274 "in range [0; 4294967295]");
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
275 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
276 if (seed == 0) {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
277 /* disable the randomized hash */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
278 memset(secret, 0, secret_size);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
279 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
280 else {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
281 lcg_urandom(seed, (unsigned char*)secret, secret_size);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
282 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
283 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
284 else {
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
285 #ifdef MS_WINDOWS
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
286 (void)win32_urandom((unsigned char *)secret, secret_size, 0);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
287 #else /* #ifdef MS_WINDOWS */
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
288 # ifdef __VMS
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
289 vms_urandom((unsigned char *)secret, secret_size, 0);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
290 # else
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
291 dev_urandom_noraise((char*)secret, secret_size);
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
292 # endif
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
293 #endif
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
294 }
f4b7ecf8a5f8 Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)
Georg Brandl <georg@python.org>
parents:
diff changeset
295 }