Fix MSVC warnings

tools/certgen.c

@@ -58,7 +58,6 @@ int certgen_main(int argc, char **argv)
 	size_t namelen;
 	time_t not_before;
 	time_t not_after;
-	uint8_t uniq_id[32];
 	uint8_t exts[512];
 	size_t extslen = 0;
 	FILE *keyfp = NULL;

tools/cmssign.c

@@ -55,16 +55,7 @@ int cmssign_main(int argc, char **argv)
 	uint8_t *cms = NULL;
 	size_t cmslen, cms_maxlen;
 	CMS_CERTS_AND_KEY cert_and_key;
-
 	int content_type;
-	uint8_t *content = NULL;
-	size_t content_len;
-
-	const uint8_t *rcpt_infos;
-	size_t rcpt_infos_len;
-	const uint8_t *shared_info1;
-	const uint8_t *shared_info2;
-	size_t shared_info1_len, shared_info2_len;
 
 	argc--;
 	argv++;

tools/rand.c

@@ -29,7 +29,6 @@ int rand_main(int argc, char **argv)
 	char *outfile = NULL;
 	FILE *outfp = stdout;
 	uint8_t buf[2048];
-	int i;
 
 	argc--;
 	argv++;
@@ -79,7 +78,7 @@ bad:
 		goto end;
 	}
 
-	while (outlen) {
+	while (outlen > 0) {
 		size_t len = outlen < sizeof(buf) ? outlen : sizeof(buf);
 
 		if (rdrand) {
@@ -107,7 +106,7 @@ bad:
 				goto end;
 			}
 		}
-		outlen -= len;
+		outlen -= (int)len;
 	}
 	if (hex) {
 		fprintf(outfp, "\n");