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Issue #25003: os.urandom() doesn't use getentropy() on Solaris because

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getentropy() is blocking, whereas os.urandom() should not block. getentropy()
is supported since Solaris 11.3.
This commit is contained in:
Victor Stinner 2015-10-01 09:59:32 +02:00
parent 3f18f10f39
commit 78cc2e8968
2 changed files with 12 additions and 4 deletions
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4
Misc/NEWS
View File

@ -10,6 +10,10 @@ Release date: tba
Core and Builtins
-----------------
- Issue #25003: os.urandom() doesn't use getentropy() on Solaris because
getentropy() is blocking, whereas os.urandom() should not block. getentropy()
is supported since Solaris 11.3.
- Issue #25182: The stdprinter (used as sys.stderr before the io module is
imported at startup) now uses the backslashreplace error handler.

12
Python/random.c
View File

@ -67,7 +67,11 @@ win32_urandom(unsigned char *buffer, Py_ssize_t size, int raise)
return 0;
}
#elif HAVE_GETENTROPY
/* Issue #25003: Don' use getentropy() on Solaris (available since
* Solaris 11.3), it is blocking whereas os.urandom() should not block. */
#elif defined(HAVE_GETENTROPY) && !defined(sun)
#define PY_GETENTROPY 1
/* Fill buffer with size pseudo-random bytes generated by getentropy().
Return 0 on success, or raise an exception and return -1 on error.
@ -275,7 +279,7 @@ _PyOS_URandom(void *buffer, Py_ssize_t size)
#ifdef MS_WINDOWS
return win32_urandom((unsigned char *)buffer, size, 1);
#elif HAVE_GETENTROPY
#elif defined(PY_GETENTROPY)
return py_getentropy(buffer, size, 0);
#else
return dev_urandom_python((char*)buffer, size);
@ -322,7 +326,7 @@ _PyRandom_Init(void)
else {
#ifdef MS_WINDOWS
(void)win32_urandom(secret, secret_size, 0);
#elif HAVE_GETENTROPY
#elif defined(PY_GETENTROPY)
(void)py_getentropy(secret, secret_size, 1);
#else
dev_urandom_noraise(secret, secret_size);
@ -338,7 +342,7 @@ _PyRandom_Fini(void)
CryptReleaseContext(hCryptProv, 0);
hCryptProv = 0;
}
#elif HAVE_GETENTROPY
#elif defined(PY_GETENTROPY)
/* nothing to clean */
#else
dev_urandom_close();