vendor/unbound/1.9.6

1 files changed, 29 insertions, 41 deletions

diff --git a/compat/getentropy_solaris.c b/compat/getentropy_solaris.c
index 810098a8d8e4..0a03046d4681 100644
--- a/compat/getentropy_solaris.c
+++ b/compat/getentropy_solaris.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: getentropy_solaris.c,v 1.3 2014/07/12 14:46:31 deraadt Exp $	*/
+/*	$OpenBSD: getentropy_solaris.c,v 1.13 2018/11/20 08:04:28 deraadt Exp $	*/
 
 /*
  * Copyright (c) 2014 Theo de Raadt <deraadt@openbsd.org>
@@ -15,9 +15,12 @@
  * 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 "config.h"
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/ioctl.h>
@@ -34,6 +37,7 @@
 #include <stdint.h>
 #endif
 #include <stdio.h>
+#include <link.h>
 #include <termios.h>
 #include <fcntl.h>
 #include <signal.h>
@@ -67,17 +71,14 @@
 
 #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);
 
-#ifdef CAN_REFERENCE_MAIN
-extern int main(int, char *argv[]);
-#endif
-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)
@@ -86,7 +87,7 @@ getentropy(void *buf, size_t len)
 
 	if (len > 256) {
 		errno = EIO;
-		return -1;
+		return (-1);
 	}
 
 	/*
@@ -153,22 +154,6 @@ 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)
 {
@@ -204,7 +189,7 @@ start:
 	}
 	for (i = 0; i < len; ) {
 		size_t wanted = len - i;
-		ssize_t ret = read(fd, (char*)buf + i, wanted);
+		ssize_t ret = read(fd, (char *)buf + i, wanted);
 
 		if (ret == -1) {
 			if (errno == EAGAIN || errno == EINTR)
@@ -215,13 +200,11 @@ start:
 		i += ret;
 	}
 	close(fd);
-	if (gotdata(buf, len) == 0) {
-		errno = save_errno;
-		return 0;		/* satisfied */
-	}
+	errno = save_errno;
+	return (0);		/* satisfied */
 nodevrandom:
 	errno = EIO;
-	return -1;
+	return (-1);
 }
 
 static const int cl[] = {
@@ -250,6 +233,15 @@ static const int cl[] = {
 };
 
 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)
 {
 	uint8_t results[SHA512_DIGEST_LENGTH];
@@ -286,6 +278,8 @@ 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);
 
@@ -306,9 +300,6 @@ getentropy_fallback(void *buf, size_t len)
 			HX(sigprocmask(SIG_BLOCK, NULL, &sigset) == -1,
 			    sigset);
 
-#ifdef CAN_REFERENCE_MAIN
-			HF(main);		/* an addr in program */
-#endif
 			HF(getentropy);	/* an addr in this library */
 			HF(printf);		/* an addr in libc */
 			p = (char *)&p;
@@ -428,14 +419,11 @@ getentropy_fallback(void *buf, size_t len)
 			HD(cnt);
 		}
 		SHA512_Final(results, &ctx);
-		memcpy((char*)buf + i, results, min(sizeof(results), len - i));
+		memcpy((char *)buf + i, results, min(sizeof(results), len - i));
 		i += min(sizeof(results), len - i);
 	}
-	memset(results, 0, sizeof results);
-	if (gotdata(buf, len) == 0) {
-		errno = save_errno;
-		return 0;		/* satisfied */
-	}
-	errno = EIO;
-	return -1;
+	explicit_bzero(&ctx, sizeof ctx);
+	explicit_bzero(results, sizeof results);
+	errno = save_errno;
+	return (0);		/* satisfied */
 }