Polish X509v3_addr_subset() a bit

Use child and parent instead of a and b. Split unrelated checks. Use
accessors and assign to local variables to avoid ugly line wrapping.
Declare vriables up front instead of mixing declarations with
assignments from function returns.

ok inoguchi jsing

1 files changed, 28 insertions, 15 deletions

diff --git a/lib/libcrypto/x509/x509_addr.c b/lib/libcrypto/x509/x509_addr.c
index 80260dca108..705fc7df326 100644
--- a/lib/libcrypto/x509/x509_addr.c
+++ b/lib/libcrypto/x509/x509_addr.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: x509_addr.c,v 1.60 2022/01/05 07:29:47 tb Exp $ */
+/*	$OpenBSD: x509_addr.c,v 1.61 2022/01/05 07:37:01 tb Exp $ */
 /*
  * Contributed to the OpenSSL Project by the American Registry for
  * Internet Numbers ("ARIN").
@@ -1678,24 +1678,37 @@ addr_contains(IPAddressOrRanges *parent, IPAddressOrRanges *child, int length)
  * Test whether a is a subset of b.
  */
 int
-X509v3_addr_subset(IPAddrBlocks *a, IPAddrBlocks *b)
+X509v3_addr_subset(IPAddrBlocks *child, IPAddrBlocks *parent)
 {
-	int i;
-	if (a == NULL || a == b)
+	IPAddressFamily *fc, *fp;
+	IPAddressOrRanges *aorc, *aorp;
+	int i, j, length;
+
+	if (child == NULL || child == parent)
 		return 1;
-	if (b == NULL || X509v3_addr_inherits(a) || X509v3_addr_inherits(b))
+	if (parent == NULL)
+		return 0;
+
+	if (X509v3_addr_inherits(child) || X509v3_addr_inherits(parent))
 		return 0;
-	(void)sk_IPAddressFamily_set_cmp_func(b, IPAddressFamily_cmp);
-	for (i = 0; i < sk_IPAddressFamily_num(a); i++) {
-		IPAddressFamily *fa = sk_IPAddressFamily_value(a, i);
-		int j = sk_IPAddressFamily_find(b, fa);
-		IPAddressFamily *fb;
-		fb = sk_IPAddressFamily_value(b, j);
-		if (fb == NULL)
+
+	sk_IPAddressFamily_set_cmp_func(parent, IPAddressFamily_cmp);
+
+	for (i = 0; i < sk_IPAddressFamily_num(child); i++) {
+		fc = sk_IPAddressFamily_value(child, i);
+
+		j = sk_IPAddressFamily_find(parent, fc);
+		fp = sk_IPAddressFamily_value(parent, j);
+		if (fp == NULL)
 			return 0;
-		if (!addr_contains(fb->ipAddressChoice->u.addressesOrRanges,
-		    fa->ipAddressChoice->u.addressesOrRanges,
-		    length_from_afi(X509v3_addr_get_afi(fb))))
+
+		if (!IPAddressFamily_afi_length(fp, &length))
+			return 0;
+
+		aorc = IPAddressFamily_addressesOrRanges(fc);
+		aorp = IPAddressFamily_addressesOrRanges(fp);
+
+		if (!addr_contains(aorp, aorc, length))
 			return 0;
 	}
 	return 1;