Lay groundwork to support X.509 v3 extensions for IP Addresses and AS Identifiers

These extensions are defined in RFC 3779 and used in the RPKI (RFC 6482, RFC 8360).
Imported from OpenSSL 1.1.1j (aaf2fcb575cdf6491b98ab4829abf78a3dec8402b8b81efc8f23c00d443981bf)
This changeset is a no-op, as there are 10+ issues and at least 2 security issues.
Work will continue in-tree.

OK tb@, discussed with beck@

1 files changed, 144 insertions, 1 deletions

diff --git a/src/lib/libcrypto/x509/x509v3.h b/src/lib/libcrypto/x509/x509v3.h
index d2754fa624..3cccf86242 100644
--- a/src/lib/libcrypto/x509/x509v3.h
+++ b/src/lib/libcrypto/x509/x509v3.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: x509v3.h,v 1.2 2020/09/13 15:06:17 beck Exp $ */
+/* $OpenBSD: x509v3.h,v 1.3 2021/09/02 12:41:44 job Exp $ */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 1999.
  */
@@ -842,6 +842,149 @@ int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE)*dn_sk,
 void X509_POLICY_NODE_print(BIO *out, X509_POLICY_NODE *node, int indent);
 DECLARE_STACK_OF(X509_POLICY_NODE)
 
+#if defined(LIBRESSL_INTERNAL)
+#ifndef OPENSSL_NO_RFC3779
+typedef struct ASRange_st {
+        ASN1_INTEGER *min, *max;
+} ASRange;
+
+# define ASIdOrRange_id          0
+# define ASIdOrRange_range       1
+
+typedef struct ASIdOrRange_st {
+    int type;
+    union {
+        ASN1_INTEGER *id;
+        ASRange *range;
+    } u;
+} ASIdOrRange;
+
+typedef STACK_OF(ASIdOrRange) ASIdOrRanges;
+DEFINE_STACK_OF(ASIdOrRange)
+
+# define ASIdentifierChoice_inherit              0
+# define ASIdentifierChoice_asIdsOrRanges        1
+
+typedef struct ASIdentifierChoice_st {
+    int type;
+    union {
+        ASN1_NULL *inherit;
+        ASIdOrRanges *asIdsOrRanges;
+    } u;
+} ASIdentifierChoice;
+
+typedef struct ASIdentifiers_st {
+    ASIdentifierChoice *asnum, *rdi;
+} ASIdentifiers;
+
+DECLARE_ASN1_FUNCTIONS(ASRange)
+DECLARE_ASN1_FUNCTIONS(ASIdOrRange)
+DECLARE_ASN1_FUNCTIONS(ASIdentifierChoice)
+DECLARE_ASN1_FUNCTIONS(ASIdentifiers)
+typedef struct IPAddressRange_st {
+    ASN1_BIT_STRING *min, *max;
+} IPAddressRange;
+
+# define IPAddressOrRange_addressPrefix  0
+# define IPAddressOrRange_addressRange   1
+
+typedef struct IPAddressOrRange_st {
+    int type;
+    union {
+        ASN1_BIT_STRING *addressPrefix;
+        IPAddressRange *addressRange;
+    } u;
+} IPAddressOrRange;
+
+typedef STACK_OF(IPAddressOrRange) IPAddressOrRanges;
+DEFINE_STACK_OF(IPAddressOrRange)
+
+# define IPAddressChoice_inherit                 0
+# define IPAddressChoice_addressesOrRanges       1
+
+typedef struct IPAddressChoice_st {
+    int type;
+    union {
+        ASN1_NULL *inherit;
+        IPAddressOrRanges *addressesOrRanges;
+    } u;
+} IPAddressChoice;
+
+typedef struct IPAddressFamily_st {
+    ASN1_OCTET_STRING *addressFamily;
+    IPAddressChoice *ipAddressChoice;
+} IPAddressFamily;
+
+typedef STACK_OF(IPAddressFamily) IPAddrBlocks;
+DEFINE_STACK_OF(IPAddressFamily)
+DECLARE_ASN1_FUNCTIONS(IPAddressRange)
+DECLARE_ASN1_FUNCTIONS(IPAddressOrRange)
+DECLARE_ASN1_FUNCTIONS(IPAddressChoice)
+DECLARE_ASN1_FUNCTIONS(IPAddressFamily)
+
+/*
+ * API tag for elements of the ASIdentifer SEQUENCE.
+ */
+# define V3_ASID_ASNUM   0
+# define V3_ASID_RDI     1
+
+/*
+ * AFI values, assigned by IANA.  It'd be nice to make the AFI
+ * handling code totally generic, but there are too many little things
+ * that would need to be defined for other address families for it to
+ * be worth the trouble.
+ */
+# define IANA_AFI_IPV4   1
+# define IANA_AFI_IPV6   2
+/*
+ * Utilities to construct and extract values from RFC3779 extensions,
+ * since some of the encodings (particularly for IP address prefixes
+ * and ranges) are a bit tedious to work with directly.
+ */
+int X509v3_asid_add_inherit(ASIdentifiers *asid, int which);
+int X509v3_asid_add_id_or_range(ASIdentifiers *asid, int which,
+                                ASN1_INTEGER *min, ASN1_INTEGER *max);
+int X509v3_addr_add_inherit(IPAddrBlocks *addr,
+                            const unsigned afi, const unsigned *safi);
+int X509v3_addr_add_prefix(IPAddrBlocks *addr,
+                           const unsigned afi, const unsigned *safi,
+                           unsigned char *a, const int prefixlen);
+int X509v3_addr_add_range(IPAddrBlocks *addr,
+                          const unsigned afi, const unsigned *safi,
+                          unsigned char *min, unsigned char *max);
+unsigned X509v3_addr_get_afi(const IPAddressFamily *f);
+int X509v3_addr_get_range(IPAddressOrRange *aor, const unsigned afi,
+                          unsigned char *min, unsigned char *max,
+                          const int length);
+/*
+ * Canonical forms.
+ */
+int X509v3_asid_is_canonical(ASIdentifiers *asid);
+int X509v3_addr_is_canonical(IPAddrBlocks *addr);
+int X509v3_asid_canonize(ASIdentifiers *asid);
+int X509v3_addr_canonize(IPAddrBlocks *addr);
+
+/*
+ * Tests for inheritance and containment.
+ */
+int X509v3_asid_inherits(ASIdentifiers *asid);
+int X509v3_addr_inherits(IPAddrBlocks *addr);
+int X509v3_asid_subset(ASIdentifiers *a, ASIdentifiers *b);
+int X509v3_addr_subset(IPAddrBlocks *a, IPAddrBlocks *b);
+
+/*
+ * Check whether RFC 3779 extensions nest properly in chains.
+ */
+int X509v3_asid_validate_path(X509_STORE_CTX *);
+int X509v3_addr_validate_path(X509_STORE_CTX *);
+int X509v3_asid_validate_resource_set(STACK_OF(X509) *chain,
+                                      ASIdentifiers *ext,
+                                      int allow_inheritance);
+int X509v3_addr_validate_resource_set(STACK_OF(X509) *chain,
+                                      IPAddrBlocks *ext, int allow_inheritance);
+
+#endif                         /* OPENSSL_NO_RFC3779 */
+#endif
 
 /* BEGIN ERROR CODES */
 /* The following lines are auto generated by the script mkerr.pl. Any changes