From: George Thessalonikefs <george@nlnetlabs.nl>
Date: Tue, 7 Jan 2020 13:06:14 +0000 (+0200)
Subject: - Downgrade compat/getentropy_solaris.c to version 1.4 from OpenBSD.
X-Git-Tag: release-1.10.0rc1~63
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d68ece28c42f7a813a026aa9b6724e16c4810a66;p=thirdparty%2Funbound.git

- Downgrade compat/getentropy_solaris.c to version 1.4 from OpenBSD.
  The dl_iterate_phdr() function introduced in newer versions raises
  compilation errors on solaris 10.
---

diff --git a/compat/getentropy_solaris.c b/compat/getentropy_solaris.c
index 0a03046d4..cfd5b7047 100644
--- a/compat/getentropy_solaris.c
+++ b/compat/getentropy_solaris.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: getentropy_solaris.c,v 1.13 2018/11/20 08:04:28 deraadt Exp $	*/
+/*	$OpenBSD: getentropy_solaris.c,v 1.4 2014/07/12 20:41:47 wouter Exp $	*/
 
 /*
  * Copyright (c) 2014 Theo de Raadt <deraadt@openbsd.org>
@@ -15,12 +15,8 @@
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * Emulation of getentropy(2) as documented at:
- * http://man.openbsd.org/getentropy.2
  */
 
-#include "config.h"
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/ioctl.h>
@@ -33,11 +29,8 @@
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <stdlib.h>
-#ifdef HAVE_STDINT_H
 #include <stdint.h>
-#endif
 #include <stdio.h>
-#include <link.h>
 #include <termios.h>
 #include <fcntl.h>
 #include <signal.h>
@@ -45,14 +38,10 @@
 #include <errno.h>
 #include <unistd.h>
 #include <time.h>
-#ifdef HAVE_SYS_SHA2_H
 #include <sys/sha2.h>
 #define SHA512_Init SHA512Init
 #define SHA512_Update SHA512Update
 #define SHA512_Final SHA512Final
-#else
-#include "openssl/sha.h"
-#endif
 
 #include <sys/vfs.h>
 #include <sys/statfs.h>
@@ -71,14 +60,15 @@
 
 #define HR(x, l) (SHA512_Update(&ctx, (char *)(x), (l)))
 #define HD(x)	 (SHA512_Update(&ctx, (char *)&(x), sizeof (x)))
-#define HF(x)    (SHA512_Update(&ctx, (char *)&(x), sizeof (void*)))
+#define HF(x)	 (SHA512_Update(&ctx, (char *)&(x), sizeof (void*)))
 
 int	getentropy(void *buf, size_t len);
 
+extern int main(int, char *argv[]);
+static int gotdata(char *buf, size_t len);
 static int getentropy_urandom(void *buf, size_t len, const char *path,
     int devfscheck);
 static int getentropy_fallback(void *buf, size_t len);
-static int getentropy_phdr(struct dl_phdr_info *info, size_t size, void *data);
 
 int
 getentropy(void *buf, size_t len)
@@ -87,7 +77,7 @@ getentropy(void *buf, size_t len)
 
 	if (len > 256) {
 		errno = EIO;
-		return (-1);
+		return -1;
 	}
 
 	/*
@@ -154,6 +144,22 @@ getentropy(void *buf, size_t len)
 	return (ret);
 }
 
+/*
+ * Basic sanity checking; wish we could do better.
+ */
+static int
+gotdata(char *buf, size_t len)
+{
+	char	any_set = 0;
+	size_t	i;
+
+	for (i = 0; i < len; ++i)
+		any_set |= buf[i];
+	if (any_set == 0)
+		return -1;
+	return 0;
+}
+
 static int
 getentropy_urandom(void *buf, size_t len, const char *path, int devfscheck)
 {
@@ -200,11 +206,13 @@ start:
 		i += ret;
 	}
 	close(fd);
-	errno = save_errno;
-	return (0);		/* satisfied */
+	if (gotdata(buf, len) == 0) {
+		errno = save_errno;
+		return 0;		/* satisfied */
+	}
 nodevrandom:
 	errno = EIO;
-	return (-1);
+	return -1;
 }
 
 static const int cl[] = {
@@ -232,15 +240,6 @@ static const int cl[] = {
 #endif
 };
 
-static int
-getentropy_phdr(struct dl_phdr_info *info, size_t size, void *data)
-{
-	SHA512_CTX *ctx = data;
-
-	SHA512_Update(ctx, &info->dlpi_addr, sizeof (info->dlpi_addr));
-	return (0);
-}
-
 static int
 getentropy_fallback(void *buf, size_t len)
 {
@@ -278,8 +277,6 @@ getentropy_fallback(void *buf, size_t len)
 				cnt += (int)tv.tv_usec;
 			}
 
-			dl_iterate_phdr(getentropy_phdr, &ctx);
-
 			for (ii = 0; ii < sizeof(cl)/sizeof(cl[0]); ii++)
 				HX(clock_gettime(cl[ii], &ts) == -1, ts);
 
@@ -300,6 +297,7 @@ getentropy_fallback(void *buf, size_t len)
 			HX(sigprocmask(SIG_BLOCK, NULL, &sigset) == -1,
 			    sigset);
 
+			HF(main);		/* an addr in program */
 			HF(getentropy);	/* an addr in this library */
 			HF(printf);		/* an addr in libc */
 			p = (char *)&p;
@@ -422,8 +420,11 @@ getentropy_fallback(void *buf, size_t len)
 		memcpy((char *)buf + i, results, min(sizeof(results), len - i));
 		i += min(sizeof(results), len - i);
 	}
-	explicit_bzero(&ctx, sizeof ctx);
-	explicit_bzero(results, sizeof results);
-	errno = save_errno;
-	return (0);		/* satisfied */
+	memset(results, 0, sizeof results);
+	if (gotdata(buf, len) == 0) {
+		errno = save_errno;
+		return 0;		/* satisfied */
+	}
+	errno = EIO;
+	return -1;
 }
diff --git a/doc/Changelog b/doc/Changelog
index 17b12330a..6626bcc0c 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -1,3 +1,8 @@
+6 January 2020: George
+	- Downgrade compat/getentropy_solaris.c to version 1.4 from OpenBSD.
+	  The dl_iterate_phdr() function introduced in newer versions raises
+	  compilation errors on solaris 10.
+
 6 January 2020: Wouter
 	- Merge #135 from Florian Obser: Use passed in neg and key cache
 	  if non-NULL.