From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Mon, 2 Sep 2019 19:34:15 +0000 (+0200)
Subject: main: fix some resource leaks
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=f34a383eeed6282fa16fb021157a60c75f33fdcd;p=project%2Fusign.git

main: fix some resource leaks

This fixes some resources leaks mostly in error patches.

Coverity: #1330236, #1330237, #1330238
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---

diff --git a/main.c b/main.c
index 3536443..ef47b28 100644
--- a/main.c
+++ b/main.c
@@ -129,6 +129,7 @@ get_file(const char *filename, char *buf, int buflen)
 
 	len = fread(buf, 1, buflen - 1, f);
 	buf[len] = 0;
+	fclose(f);
 }
 
 static bool
@@ -171,6 +172,7 @@ static int verify(const char *msgfile)
 	if (!get_base64_file(sigfile, &sig, sizeof(sig), buf, sizeof(buf)) ||
 	    memcmp(sig.pkalg, "Ed", 2) != 0) {
 		fprintf(stderr, "Failed to decode signature\n");
+		fclose(f);
 		return 1;
 	}
 
@@ -183,6 +185,7 @@ static int verify(const char *msgfile)
 	if (!get_base64_file(pubkeyfile, &pkey, sizeof(pkey), buf, sizeof(buf)) ||
 	    memcmp(pkey.pkalg, "Ed", 2) != 0) {
 		fprintf(stderr, "Failed to decode public key\n");
+		fclose(f);
 		return 1;
 	}
 
@@ -292,11 +295,16 @@ static int generate(void)
 	FILE *f;
 
 	f = fopen("/dev/urandom", "r");
-	if (!f ||
-	    fread(skey.fingerprint, sizeof(skey.fingerprint), 1, f) != 1 ||
+	if (!f) {
+		fprintf(stderr, "Can't open /dev/urandom\n");
+		return 1;
+	}
+
+	if (fread(skey.fingerprint, sizeof(skey.fingerprint), 1, f) != 1 ||
 	    fread(skey.seckey, EDSIGN_SECRET_KEY_SIZE, 1, f) != 1 ||
 	    fread(skey.salt, sizeof(skey.salt), 1, f) != 1) {
 		fprintf(stderr, "Can't read data from /dev/urandom\n");
+		fclose(f);
 		return 1;
 	}
 	if (f)