diff options
author | Ben Laurie <ben@openssl.org> | 2006-11-27 14:18:05 +0000 |
---|---|---|
committer | Ben Laurie <ben@openssl.org> | 2006-11-27 14:18:05 +0000 |
commit | 96ea4ae91c7fda9fd28a013182b0e8dc67b7ac7d (patch) | |
tree | 364aa21990f695348601d6f4a8774fe7d861e26e /crypto/x509v3 | |
parent | 7af5726108188e4e4e4ca1a95cea43801ec19905 (diff) |
Add RFC 3779 support.
Diffstat (limited to 'crypto/x509v3')
-rw-r--r-- | crypto/x509v3/Makefile | 35 | ||||
-rw-r--r-- | crypto/x509v3/ext_dat.h | 5 | ||||
-rw-r--r-- | crypto/x509v3/pcy_tree.c | 10 | ||||
-rw-r--r-- | crypto/x509v3/v3_addr.c | 1280 | ||||
-rw-r--r-- | crypto/x509v3/v3_asid.c | 844 | ||||
-rw-r--r-- | crypto/x509v3/v3_purp.c | 10 | ||||
-rw-r--r-- | crypto/x509v3/v3_utl.c | 3 | ||||
-rw-r--r-- | crypto/x509v3/v3err.c | 10 | ||||
-rw-r--r-- | crypto/x509v3/x509v3.h | 160 |
9 files changed, 2353 insertions, 4 deletions
diff --git a/crypto/x509v3/Makefile b/crypto/x509v3/Makefile index 7a5266e675..556ef351bf 100644 --- a/crypto/x509v3/Makefile +++ b/crypto/x509v3/Makefile @@ -21,12 +21,14 @@ LIBSRC= v3_bcons.c v3_bitst.c v3_conf.c v3_extku.c v3_ia5.c v3_lib.c \ v3_prn.c v3_utl.c v3err.c v3_genn.c v3_alt.c v3_skey.c v3_akey.c v3_pku.c \ v3_int.c v3_enum.c v3_sxnet.c v3_cpols.c v3_crld.c v3_purp.c v3_info.c \ v3_ocsp.c v3_akeya.c v3_pmaps.c v3_pcons.c v3_ncons.c v3_pcia.c v3_pci.c \ -pcy_cache.c pcy_node.c pcy_data.c pcy_map.c pcy_tree.c pcy_lib.c +pcy_cache.c pcy_node.c pcy_data.c pcy_map.c pcy_tree.c pcy_lib.c \ +v3_asid.c v3_addr.c LIBOBJ= v3_bcons.o v3_bitst.o v3_conf.o v3_extku.o v3_ia5.o v3_lib.o \ v3_prn.o v3_utl.o v3err.o v3_genn.o v3_alt.o v3_skey.o v3_akey.o v3_pku.o \ v3_int.o v3_enum.o v3_sxnet.o v3_cpols.o v3_crld.o v3_purp.o v3_info.o \ v3_ocsp.o v3_akeya.o v3_pmaps.o v3_pcons.o v3_ncons.o v3_pcia.o v3_pci.o \ -pcy_cache.o pcy_node.o pcy_data.o pcy_map.o pcy_tree.o pcy_lib.o +pcy_cache.o pcy_node.o pcy_data.o pcy_map.o pcy_tree.o pcy_lib.o \ +v3_asid.o v3_addr.o SRC= $(LIBSRC) @@ -166,6 +168,20 @@ pcy_tree.o: ../../include/openssl/sha.h ../../include/openssl/stack.h pcy_tree.o: ../../include/openssl/symhacks.h ../../include/openssl/x509.h pcy_tree.o: ../../include/openssl/x509_vfy.h ../../include/openssl/x509v3.h pcy_tree.o: ../cryptlib.h pcy_int.h pcy_tree.c +v3_addr.o: ../../e_os.h ../../include/openssl/asn1.h +v3_addr.o: ../../include/openssl/asn1t.h ../../include/openssl/bio.h +v3_addr.o: ../../include/openssl/buffer.h ../../include/openssl/conf.h +v3_addr.o: ../../include/openssl/crypto.h ../../include/openssl/e_os2.h +v3_addr.o: ../../include/openssl/ec.h ../../include/openssl/ecdh.h +v3_addr.o: ../../include/openssl/ecdsa.h ../../include/openssl/err.h +v3_addr.o: ../../include/openssl/evp.h ../../include/openssl/lhash.h +v3_addr.o: ../../include/openssl/obj_mac.h ../../include/openssl/objects.h +v3_addr.o: ../../include/openssl/opensslconf.h ../../include/openssl/opensslv.h +v3_addr.o: ../../include/openssl/ossl_typ.h ../../include/openssl/pkcs7.h +v3_addr.o: ../../include/openssl/safestack.h ../../include/openssl/sha.h +v3_addr.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h +v3_addr.o: ../../include/openssl/x509.h ../../include/openssl/x509_vfy.h +v3_addr.o: ../../include/openssl/x509v3.h ../cryptlib.h v3_addr.c v3_akey.o: ../../e_os.h ../../include/openssl/asn1.h v3_akey.o: ../../include/openssl/asn1t.h ../../include/openssl/bio.h v3_akey.o: ../../include/openssl/buffer.h ../../include/openssl/conf.h @@ -208,6 +224,21 @@ v3_alt.o: ../../include/openssl/safestack.h ../../include/openssl/sha.h v3_alt.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h v3_alt.o: ../../include/openssl/x509.h ../../include/openssl/x509_vfy.h v3_alt.o: ../../include/openssl/x509v3.h ../cryptlib.h v3_alt.c +v3_asid.o: ../../e_os.h ../../include/openssl/asn1.h +v3_asid.o: ../../include/openssl/asn1t.h ../../include/openssl/bio.h +v3_asid.o: ../../include/openssl/bn.h ../../include/openssl/buffer.h +v3_asid.o: ../../include/openssl/conf.h ../../include/openssl/crypto.h +v3_asid.o: ../../include/openssl/e_os2.h ../../include/openssl/ec.h +v3_asid.o: ../../include/openssl/ecdh.h ../../include/openssl/ecdsa.h +v3_asid.o: ../../include/openssl/err.h ../../include/openssl/evp.h +v3_asid.o: ../../include/openssl/lhash.h ../../include/openssl/obj_mac.h +v3_asid.o: ../../include/openssl/objects.h ../../include/openssl/opensslconf.h +v3_asid.o: ../../include/openssl/opensslv.h ../../include/openssl/ossl_typ.h +v3_asid.o: ../../include/openssl/pkcs7.h ../../include/openssl/safestack.h +v3_asid.o: ../../include/openssl/sha.h ../../include/openssl/stack.h +v3_asid.o: ../../include/openssl/symhacks.h ../../include/openssl/x509.h +v3_asid.o: ../../include/openssl/x509_vfy.h ../../include/openssl/x509v3.h +v3_asid.o: ../cryptlib.h v3_asid.c v3_bcons.o: ../../e_os.h ../../include/openssl/asn1.h v3_bcons.o: ../../include/openssl/asn1t.h ../../include/openssl/bio.h v3_bcons.o: ../../include/openssl/buffer.h ../../include/openssl/conf.h diff --git a/crypto/x509v3/ext_dat.h b/crypto/x509v3/ext_dat.h index e23ee9bc79..d1e3c99b4b 100644 --- a/crypto/x509v3/ext_dat.h +++ b/crypto/x509v3/ext_dat.h @@ -67,6 +67,7 @@ extern X509V3_EXT_METHOD v3_ocsp_crlid, v3_ocsp_nocheck, v3_ocsp_serviceloc; extern X509V3_EXT_METHOD v3_crl_hold, v3_pci; extern X509V3_EXT_METHOD v3_policy_mappings, v3_policy_constraints; extern X509V3_EXT_METHOD v3_name_constraints, v3_inhibit_anyp, v3_idp; +extern X509V3_EXT_METHOD v3_addr, v3_asid; /* This table will be searched using OBJ_bsearch so it *must* kept in * order of the ext_nid values. @@ -99,6 +100,10 @@ static X509V3_EXT_METHOD *standard_exts[] = { #endif &v3_sxnet, &v3_info, +#ifdef OPENSSL_RFC3779 +&v3_addr, +&v3_asid, +#endif #ifndef OPENSSL_NO_OCSP &v3_ocsp_nonce, &v3_ocsp_crlid, diff --git a/crypto/x509v3/pcy_tree.c b/crypto/x509v3/pcy_tree.c index 846a903e93..27d29f25a8 100644 --- a/crypto/x509v3/pcy_tree.c +++ b/crypto/x509v3/pcy_tree.c @@ -628,6 +628,16 @@ int X509_policy_check(X509_POLICY_TREE **ptree, int *pexplicit_policy, /* Tree OK: continue */ case 1: + if (!tree) + /* + * tree_init() returns success and a null tree + * if it's just looking at a trust anchor. + * I'm not sure that returning success here is + * correct, but I'm sure that reporting this + * as an internal error which our caller + * interprets as a malloc failure is wrong. + */ + return 1; break; } diff --git a/crypto/x509v3/v3_addr.c b/crypto/x509v3/v3_addr.c new file mode 100644 index 0000000000..8ba2254856 --- /dev/null +++ b/crypto/x509v3/v3_addr.c @@ -0,0 +1,1280 @@ +/* + * Contributed to the OpenSSL Project by the American Registry for + * Internet Numbers ("ARIN"). + */ +/* ==================================================================== + * Copyright (c) 2006 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + */ + +/* + * Implementation of RFC 3779 section 2.2. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <assert.h> +#include "cryptlib.h" +#include <openssl/conf.h> +#include <openssl/asn1.h> +#include <openssl/asn1t.h> +#include <openssl/x509v3.h> + +#ifdef OPENSSL_RFC3779 + +/* + * OpenSSL ASN.1 template translation of RFC 3779 2.2.3. + */ + +ASN1_SEQUENCE(IPAddressRange) = { + ASN1_SIMPLE(IPAddressRange, min, ASN1_BIT_STRING), + ASN1_SIMPLE(IPAddressRange, max, ASN1_BIT_STRING) +} ASN1_SEQUENCE_END(IPAddressRange) + +ASN1_CHOICE(IPAddressOrRange) = { + ASN1_SIMPLE(IPAddressOrRange, u.addressPrefix, ASN1_BIT_STRING), + ASN1_SIMPLE(IPAddressOrRange, u.addressRange, IPAddressRange) +} ASN1_CHOICE_END(IPAddressOrRange) + +ASN1_CHOICE(IPAddressChoice) = { + ASN1_SIMPLE(IPAddressChoice, u.inherit, ASN1_NULL), + ASN1_SEQUENCE_OF(IPAddressChoice, u.addressesOrRanges, IPAddressOrRange) +} ASN1_CHOICE_END(IPAddressChoice) + +ASN1_SEQUENCE(IPAddressFamily) = { + ASN1_SIMPLE(IPAddressFamily, addressFamily, ASN1_OCTET_STRING), + ASN1_SIMPLE(IPAddressFamily, ipAddressChoice, IPAddressChoice) +} ASN1_SEQUENCE_END(IPAddressFamily) + +ASN1_ITEM_TEMPLATE(IPAddrBlocks) = + ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, + IPAddrBlocks, IPAddressFamily) +ASN1_ITEM_TEMPLATE_END(IPAddrBlocks) + +IMPLEMENT_ASN1_FUNCTIONS(IPAddressRange) +IMPLEMENT_ASN1_FUNCTIONS(IPAddressOrRange) +IMPLEMENT_ASN1_FUNCTIONS(IPAddressChoice) +IMPLEMENT_ASN1_FUNCTIONS(IPAddressFamily) + +/* + * How much buffer space do we need for a raw address? + */ +#define ADDR_RAW_BUF_LEN 16 + +/* + * What's the address length associated with this AFI? + */ +static int length_from_afi(const unsigned afi) +{ + switch (afi) { + case IANA_AFI_IPV4: + return 4; + case IANA_AFI_IPV6: + return 16; + default: + return 0; + } +} + +/* + * Extract the AFI from an IPAddressFamily. + */ +unsigned v3_addr_get_afi(const IPAddressFamily *f) +{ + return ((f != NULL && + f->addressFamily != NULL && + f->addressFamily->data != NULL) + ? ((f->addressFamily->data[0] << 8) | + (f->addressFamily->data[1])) + : 0); +} + +/* + * Expand the bitstring form of an address into a raw byte array. + * At the moment this is coded for simplicity, not speed. + */ +static void addr_expand(unsigned char *addr, + const ASN1_BIT_STRING *bs, + const int length, + const unsigned char fill) +{ + assert(bs->length >= 0 && bs->length <= length); + if (bs->length > 0) { + memcpy(addr, bs->data, bs->length); + if ((bs->flags & 7) != 0) { + unsigned char mask = 0xFF >> (8 - (bs->flags & 7)); + if (fill == 0) + addr[bs->length - 1] &= ~mask; + else + addr[bs->length - 1] |= mask; + } + } + memset(addr + bs->length, fill, length - bs->length); +} + +/* + * Extract the prefix length from a bitstring. + */ +#define addr_prefixlen(bs) ((int) ((bs)->length * 8 - ((bs)->flags & 7))) + +/* + * i2r handler for one address bitstring. + */ +static int i2r_address(BIO *out, + const unsigned afi, + const unsigned char fill, + const ASN1_BIT_STRING *bs) +{ + unsigned char addr[ADDR_RAW_BUF_LEN]; + int i, n; + + switch (afi) { + case IANA_AFI_IPV4: + addr_expand(addr, bs, 4, fill); + BIO_printf(out, "%d.%d.%d.%d", addr[0], addr[1], addr[2], addr[3]); + break; + case IANA_AFI_IPV6: + addr_expand(addr, bs, 16, fill); + for (n = 16; n > 1 && addr[n-1] == 0x00 && addr[n-2] == 0x00; n -= 2) + ; + for (i = 0; i < n; i += 2) + BIO_printf(out, "%x%s", (addr[i] << 8) | addr[i+1], (i < 14 ? ":" : "")); + if (i < 16) + BIO_puts(out, ":"); + break; + default: + for (i = 0; i < bs->length; i++) + BIO_printf(out, "%s%02x", (i > 0 ? ":" : ""), bs->data[i]); + BIO_printf(out, "[%d]", (int) (bs->flags & 7)); + break; + } + return 1; +} + +/* + * i2r handler for a sequence of addresses and ranges. + */ +static int i2r_IPAddressOrRanges(BIO *out, + const int indent, + const IPAddressOrRanges *aors, + const unsigned afi) +{ + int i; + for (i = 0; i < sk_IPAddressOrRange_num(aors); i++) { + const IPAddressOrRange *aor = sk_IPAddressOrRange_value(aors, i); + BIO_printf(out, "%*s", indent, ""); + switch (aor->type) { + case IPAddressOrRange_addressPrefix: + if (!i2r_address(out, afi, 0x00, aor->u.addressPrefix)) + return 0; + BIO_printf(out, "/%d\n", addr_prefixlen(aor->u.addressPrefix)); + continue; + case IPAddressOrRange_addressRange: + if (!i2r_address(out, afi, 0x00, aor->u.addressRange->min)) + return 0; + BIO_puts(out, "-"); + if (!i2r_address(out, afi, 0xFF, aor->u.addressRange->max)) + return 0; + BIO_puts(out, "\n"); + continue; + } + } + return 1; +} + +/* + * i2r handler for an IPAddrBlocks extension. + */ +static int i2r_IPAddrBlocks(X509V3_EXT_METHOD *method, + void *ext, + BIO *out, + int indent) +{ + const IPAddrBlocks *addr = ext; + int i; + for (i = 0; i < sk_IPAddressFamily_num(addr); i++) { + IPAddressFamily *f = sk_IPAddressFamily_value(addr, i); + const unsigned afi = v3_addr_get_afi(f); + switch (afi) { + case IANA_AFI_IPV4: + BIO_printf(out, "%*sIPv4", indent, ""); + break; + case IANA_AFI_IPV6: + BIO_printf(out, "%*sIPv6", indent, ""); + break; + default: + BIO_printf(out, "%*sUnknown AFI %u", indent, "", afi); + break; + } + if (f->addressFamily->length > 2) { + switch (f->addressFamily->data[2]) { + case 1: + BIO_puts(out, " (Unicast)"); + break; + case 2: + BIO_puts(out, " (Multicast)"); + break; + case 3: + BIO_puts(out, " (Unicast/Multicast)"); + break; + case 4: + BIO_puts(out, " (MPLS)"); + break; + case 64: + BIO_puts(out, " (Tunnel)"); + break; + case 65: + BIO_puts(out, " (VPLS)"); + break; + case 66: + BIO_puts(out, " (BGP MDT)"); + break; + case 128: + BIO_puts(out, " (MPLS-labeled VPN)"); + break; + default: + BIO_printf(out, " (Unknown SAFI %u)", + (unsigned) f->addressFamily->data[2]); + break; + } + } + switch (f->ipAddressChoice->type) { + case IPAddressChoice_inherit: + BIO_puts(out, ": inherit\n"); + break; + case IPAddressChoice_addressesOrRanges: + BIO_puts(out, ":\n"); + if (!i2r_IPAddressOrRanges(out, + indent + 2, + f->ipAddressChoice->u.addressesOrRanges, + afi)) + return 0; + break; + } + } + return 1; +} + +/* + * Sort comparison function for a sequence of IPAddressOrRange + * elements. + */ +static int IPAddressOrRange_cmp(const IPAddressOrRange *a, + const IPAddressOrRange *b, + const int length) +{ + unsigned char addr_a[ADDR_RAW_BUF_LEN], addr_b[ADDR_RAW_BUF_LEN]; + int prefixlen_a = 0, prefixlen_b = 0; + int r; + + switch (a->type) { + case IPAddressOrRange_addressPrefix: + addr_expand(addr_a, a->u.addressPrefix, length, 0x00); + prefixlen_a = addr_prefixlen(a->u.addressPrefix); + break; + case IPAddressOrRange_addressRange: + addr_expand(addr_a, a->u.addressRange->min, length, 0x00); + prefixlen_a = length * 8; + break; + } + + switch (b->type) { + case IPAddressOrRange_addressPrefix: + addr_expand(addr_b, b->u.addressPrefix, length, 0x00); + prefixlen_b = addr_prefixlen(b->u.addressPrefix); + break; + case IPAddressOrRange_addressRange: + addr_expand(addr_b, b->u.addressRange->min, length, 0x00); + prefixlen_b = length * 8; + break; + } + + if ((r = memcmp(addr_a, addr_b, length)) != 0) + return r; + else + return prefixlen_a - prefixlen_b; +} + +/* + * IPv4-specific closure over IPAddressOrRange_cmp, since sk_sort() + * comparision routines are only allowed two arguments. + */ +static int v4IPAddressOrRange_cmp(const IPAddressOrRange * const *a, + const IPAddressOrRange * const *b) +{ + return IPAddressOrRange_cmp(*a, *b, 4); +} + +/* + * IPv6-specific closure over IPAddressOrRange_cmp, since sk_sort() + * comparision routines are only allowed two arguments. + */ +static int v6IPAddressOrRange_cmp(const IPAddressOrRange * const *a, + const IPAddressOrRange * const *b) +{ + return IPAddressOrRange_cmp(*a, *b, 16); +} + +/* + * Calculate whether a range collapses to a prefix. + * See last paragraph of RFC 3779 2.2.3.7. + */ +static int range_should_be_prefix(const unsigned char *min, + const unsigned char *max, + const int length) +{ + unsigned char mask; + int i, j; + + for (i = 0; i < length && min[i] == max[i]; i++) + ; + for (j = length - 1; j >= 0 && min[j] == 0x00 && max[j] == 0xFF; j--) + ; + if (i < j) + return -1; + if (i > j) + return i * 8; + mask = min[i] ^ max[i]; + switch (mask) { + case 0x01: j = 7; break; + case 0x03: j = 6; break; + case 0x07: j = 5; break; + case 0x0F: j = 4; break; + case 0x1F: j = 3; break; + case 0x3F: j = 2; break; + case 0x7F: j = 1; break; + default: return -1; + } + if ((min[i] & mask) != 0 || (max[i] & mask) != mask) + return -1; + else + return i * 8 + j; +} + +/* + * Construct a prefix. + */ +static int make_addressPrefix(IPAddressOrRange **result, + unsigned char *addr, + const int prefixlen) +{ + int bytelen = (prefixlen + 7) / 8, bitlen = prefixlen % 8; + IPAddressOrRange *aor = IPAddressOrRange_new(); + + if (aor == NULL) + return 0; + aor->type = IPAddressOrRange_addressPrefix; + if (aor->u.addressPrefix == NULL && + (aor->u.addressPrefix = ASN1_BIT_STRING_new()) == NULL) + goto err; + if (!ASN1_BIT_STRING_set(aor->u.addressPrefix, addr, bytelen)) + goto err; + aor->u.addressPrefix->flags &= ~7; + aor->u.addressPrefix->flags |= ASN1_STRING_FLAG_BITS_LEFT; + if (bitlen > 0) { + aor->u.addressPrefix->data[bytelen - 1] &= ~(0xFF >> bitlen); + aor->u.addressPrefix->flags |= 8 - bitlen; + } + + *result = aor; + return 1; + + err: + IPAddressOrRange_free(aor); + return 0; +} + +/* + * Construct a range. If it can be expressed as a prefix, + * return a prefix instead. Doing this here simplifies + * the rest of the code considerably. + */ +static int make_addressRange(IPAddressOrRange **result, + unsigned char *min, + unsigned char *max, + const int length) +{ + IPAddressOrRange *aor; + int i, prefixlen; + + if ((prefixlen = range_should_be_prefix(min, max, length)) >= 0) + return make_addressPrefix(result, min, prefixlen); + + if ((aor = IPAddressOrRange_new()) == NULL) + return 0; + aor->type = IPAddressOrRange_addressRange; + assert(aor->u.addressRange == NULL); + if ((aor->u.addressRange = IPAddressRange_new()) == NULL) + goto err; + if (aor->u.addressRange->min == NULL && + (aor->u.addressRange->min = ASN1_BIT_STRING_new()) == NULL) + goto err; + if (aor->u.addressRange->max == NULL && + (aor->u.addressRange->max = ASN1_BIT_STRING_new()) == NULL) + goto err; + + for (i = length; i > 0 && min[i - 1] == 0x00; --i) + ; + if (!ASN1_BIT_STRING_set(aor->u.addressRange->min, min, i)) + goto err; + aor->u.addressRange->min->flags &= ~7; + aor->u.addressRange->min->flags |= ASN1_STRING_FLAG_BITS_LEFT; + if (i > 0) { + unsigned char b = min[i - 1]; + int j = 1; + while ((b & (0xFFU >> j)) != 0) + ++j; + aor->u.addressRange->min->flags |= 8 - j; + } + + for (i = length; i > 0 && max[i - 1] == 0xFF; --i) + ; + if (!ASN1_BIT_STRING_set(aor->u.addressRange->max, max, i)) + goto err; + aor->u.addressRange->max->flags &= ~7; + aor->u.addressRange->max->flags |= ASN1_STRING_FLAG_BITS_LEFT; + if (i > 0) { + unsigned char b = max[i - 1]; + int j = 1; + while ((b & (0xFFU >> j)) != (0xFFU >> j)) + ++j; + aor->u.addressRange->max->flags |= 8 - j; + } + + *result = aor; + return 1; + + err: + IPAddressOrRange_free(aor); + return 0; +} + +/* + * Construct a new address family or find an existing one. + */ +static IPAddressFamily *make_IPAddressFamily(IPAddrBlocks *addr, + const unsigned afi, + const unsigned *safi) +{ + IPAddressFamily *f; + unsigned char key[3]; + unsigned keylen; + int i; + + key[0] = (afi >> 8) & 0xFF; + key[1] = afi & 0xFF; + if (safi != NULL) { + key[2] = *safi & 0xFF; + keylen = 3; + } else { + keylen = 2; + } + + for (i = 0; i < sk_IPAddressFamily_num(addr); i++) { + f = sk_IPAddressFamily_value(addr, i); + assert(f->addressFamily->data != NULL); + if (f->addressFamily->length == keylen && + !memcmp(f->addressFamily->data, key, keylen)) + return f; + } + + if ((f = IPAddressFamily_new()) == NULL) + goto err; + if (f->ipAddressChoice == NULL && + (f->ipAddressChoice = IPAddressChoice_new()) == NULL) + goto err; + if (f->addressFamily == NULL && + (f->addressFamily = ASN1_OCTET_STRING_new()) == NULL) + goto err; + if (!ASN1_OCTET_STRING_set(f->addressFamily, key, keylen)) + goto err; + if (!sk_IPAddressFamily_push(addr, f)) + goto err; + + return f; + + err: + IPAddressFamily_free(f); + return NULL; +} + +/* + * Add an inheritance element. + */ +int v3_addr_add_inherit(IPAddrBlocks *addr, + const unsigned afi, + const unsigned *safi) +{ + IPAddressFamily *f = make_IPAddressFamily(addr, afi, safi); + if (f == NULL || + f->ipAddressChoice == NULL || + (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges && + f->ipAddressChoice->u.addressesOrRanges != NULL)) + return 0; + if (f->ipAddressChoice->type == IPAddressChoice_inherit && + f->ipAddressChoice->u.inherit != NULL) + return 1; + if (f->ipAddressChoice->u.inherit == NULL && + (f->ipAddressChoice->u.inherit = ASN1_NULL_new()) == NULL) + return 0; + f->ipAddressChoice->type = IPAddressChoice_inherit; + return 1; +} + +/* + * Construct an IPAddressOrRange sequence, or return an existing one. + */ +static IPAddressOrRanges *make_prefix_or_range(IPAddrBlocks *addr, + const unsigned afi, + const unsigned *safi) +{ + IPAddressFamily *f = make_IPAddressFamily(addr, afi, safi); + IPAddressOrRanges *aors = NULL; + + if (f == NULL || + f->ipAddressChoice == NULL || + (f->ipAddressChoice->type == IPAddressChoice_inherit && + f->ipAddressChoice->u.inherit != NULL)) + return NULL; + if (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges) + aors = f->ipAddressChoice->u.addressesOrRanges; + if (aors != NULL) + return aors; + if ((aors = sk_IPAddressOrRange_new_null()) == NULL) + return NULL; + switch (afi) { + case IANA_AFI_IPV4: + sk_IPAddressOrRange_set_cmp_func(aors, v4IPAddressOrRange_cmp); + break; + case IANA_AFI_IPV6: + sk_IPAddressOrRange_set_cmp_func(aors, v6IPAddressOrRange_cmp); + break; + } + f->ipAddressChoice->type = IPAddressChoice_addressesOrRanges; + f->ipAddressChoice->u.addressesOrRanges = aors; + return aors; +} + +/* + * Add a prefix. + */ +int v3_addr_add_prefix(IPAddrBlocks *addr, + const unsigned afi, + const unsigned *safi, + unsigned char *a, + const int prefixlen) +{ + IPAddressOrRanges *aors = make_prefix_or_range(addr, afi, safi); + IPAddressOrRange *aor; + if (aors == NULL || !make_addressPrefix(&aor, a, prefixlen)) + return 0; + if (sk_IPAddressOrRange_push(aors, aor)) + return 1; + IPAddressOrRange_free(aor); + return 0; +} + +/* + * Add a range. + */ +int v3_addr_add_range(IPAddrBlocks *addr, + const unsigned afi, + const unsigned *safi, + unsigned char *min, + unsigned char *max) +{ + IPAddressOrRanges *aors = make_prefix_or_range(addr, afi, safi); + IPAddressOrRange *aor; + int length = length_from_afi(afi); + if (aors == NULL) + return 0; + if (!make_addressRange(&aor, min, max, length)) + return 0; + if (sk_IPAddressOrRange_push(aors, aor)) + return 1; + IPAddressOrRange_free(aor); + return 0; +} + +/* + * Extract min and max values from an IPAddressOrRange. + */ +static void extract_min_max(IPAddressOrRange *aor, + unsigned char *min, + unsigned char *max, + int length) +{ + assert(aor != NULL && min != NULL && max != NULL); + switch (aor->type) { + case IPAddressOrRange_addressPrefix: + addr_expand(min, aor->u.addressPrefix, length, 0x00); + addr_expand(max, aor->u.addressPrefix, length, 0xFF); + return; + case IPAddressOrRange_addressRange: + addr_expand(min, aor->u.addressRange->min, length, 0x00); + addr_expand(max, aor->u.addressRange->max, length, 0xFF); + return; + } +} + +/* + * Public wrapper for extract_min_max(). + */ +int v3_addr_get_range(IPAddressOrRange *aor, + const unsigned afi, + unsigned char *min, + unsigned char *max, + const int length) +{ + int afi_length = length_from_afi(afi); + if (aor == NULL || min == NULL || max == NULL || + afi_length == 0 || length < afi_length || + (aor->type != IPAddressOrRange_addressPrefix && + aor->type != IPAddressOrRange_addressRange)) + return 0; + extract_min_max(aor, min, max, afi_length); + return afi_length; +} + +/* + * Sort comparision function for a sequence of IPAddressFamily. + * + * The last paragraph of RFC 3779 2.2.3.3 is slightly ambiguous about + * the ordering: I can read it as meaning that IPv6 without a SAFI + * comes before IPv4 with a SAFI, which seems pretty weird. The + * examples in appendix B suggest that the author intended the + * null-SAFI rule to apply only within a single AFI, which is what I + * would have expected and is what the following code implements. + */ +static int IPAddressFamily_cmp(const IPAddressFamily * const *a_, + const IPAddressFamily * const *b_) +{ + const ASN1_OCTET_STRING *a = (*a_)->addressFamily; + const ASN1_OCTET_STRING *b = (*b_)->addressFamily; + int len = ((a->length <= b->length) ? a->length : b->length); + int cmp = memcmp(a->data, b->data, len); + return cmp ? cmp : a->length - b->length; +} + +/* + * Check whether an IPAddrBLocks is in canonical form. + */ +int v3_addr_is_canonical(IPAddrBlocks *addr) +{ + unsigned char a_min[ADDR_RAW_BUF_LEN], a_max[ADDR_RAW_BUF_LEN]; + unsigned char b_min[ADDR_RAW_BUF_LEN], b_max[ADDR_RAW_BUF_LEN]; + IPAddressOrRanges *aors; + int i, j, k; + + /* + * Empty extension is cannonical. + */ + if (addr == NULL) + return 1; + + /* + * Check whether the top-level list is in order. + */ + for (i = 0; i < sk_IPAddressFamily_num(addr) - 1; i++) { + const IPAddressFamily *a = sk_IPAddressFamily_value(addr, i); + const IPAddressFamily *b = sk_IPAddressFamily_value(addr, i + 1); + if (IPAddressFamily_cmp(&a, &b) >= 0) + return 0; + } + + /* + * Top level's ok, now check each address family. + */ + for (i = 0; i < sk_IPAddressFamily_num(addr); i++) { + IPAddressFamily *f = sk_IPAddressFamily_value(addr, i); + int length = length_from_afi(v3_addr_get_afi(f)); + + /* + * Inheritance is canonical. Anything other than inheritance or + * a SEQUENCE OF IPAddressOrRange is an ASN.1 error or something. + */ + if (f == NULL || f->ipAddressChoice == NULL) + return 0; + switch (f->ipAddressChoice->type) { + case IPAddressChoice_inherit: + continue; + case IPAddressChoice_addressesOrRanges: + break; + default: + return 0; + } + + /* + * It's an IPAddressOrRanges sequence, check it. + */ + aors = f->ipAddressChoice->u.addressesOrRanges; + if (sk_IPAddressOrRange_num(aors) == 0) + return 0; + for (j = 0; j < sk_IPAddressOrRange_num(aors) - 1; j++) { + IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, j); + IPAddressOrRange *b = sk_IPAddressOrRange_value(aors, j + 1); + + extract_min_max(a, a_min, a_max, length); + extract_min_max(b, b_min, b_max, length); + + /* + * Punt misordered list, overlapping start, or inverted range. + */ + if (memcmp(a_min, b_min, length) >= 0 || + memcmp(a_min, a_max, length) > 0 || + memcmp(b_min, b_max, length) > 0) + return 0; + + /* + * Punt if adjacent or overlapping. Check for adjacency by + * subtracting one from b_min first. + */ + for (k = length - 1; k >= 0 && b_min[k]-- == 0x00; k--) + ; + if (memcmp(a_max, b_min, length) >= 0) + return 0; + + /* + * Check for range that should be expressed as a prefix. + */ + if (a->type == IPAddressOrRange_addressRange && + range_should_be_prefix(a_min, a_max, length) >= 0) + return 0; + } + + /* + * Check final range to see if it should be a prefix. + */ + j = sk_IPAddressOrRange_num(aors) - 1; + { + IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, j); + if (a->type == IPAddressOrRange_addressRange) { + extract_min_max(a, a_min, a_max, length); + if (range_should_be_prefix(a_min, a_max, length) >= 0) + return 0; + } + } + } + + /* + * If we made it through all that, we're happy. + */ + return 1; +} + +/* + * Whack an IPAddressOrRanges into canonical form. + */ +static int IPAddressOrRanges_canonize(IPAddressOrRanges *aors, + const unsigned afi) +{ + int i, j, length = length_from_afi(afi); + + /* + * Sort the IPAddressOrRanges sequence. + */ + sk_IPAddressOrRange_sort(aors); + + /* + * Clean up representation issues, punt on duplicates or overlaps. + */ + for (i = 0; i < sk_IPAddressOrRange_num(aors) - 1; i++) { + IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, i); + IPAddressOrRange *b = sk_IPAddressOrRange_value(aors, i + 1); + unsigned char a_min[ADDR_RAW_BUF_LEN], a_max[ADDR_RAW_BUF_LEN]; + unsigned char b_min[ADDR_RAW_BUF_LEN], b_max[ADDR_RAW_BUF_LEN]; + + extract_min_max(a, a_min, a_max, length); + extract_min_max(b, b_min, b_max, length); + + /* + * Punt overlaps. + */ + if (memcmp(a_max, b_min, length) >= 0) + return 0; + + /* + * Merge if a and b are adjacent. We check for + * adjacency by subtracting one from b_min first. + */ + for (j = length - 1; j >= 0 && b_min[j]-- == 0x00; j--) + ; + if (memcmp(a_max, b_min, length) == 0) { + IPAddressOrRange *merged; + if (!make_addressRange(&merged, a_min, b_max, length)) + return 0; + sk_IPAddress |