diff options
Diffstat (limited to 'openssl/crypto/x509v3/v3_addr.c')
| -rw-r--r-- | openssl/crypto/x509v3/v3_addr.c | 1293 |
1 files changed, 0 insertions, 1293 deletions
diff --git a/openssl/crypto/x509v3/v3_addr.c b/openssl/crypto/x509v3/v3_addr.c deleted file mode 100644 index 0d70e869..00000000 --- a/openssl/crypto/x509v3/v3_addr.c +++ /dev/null @@ -1,1293 +0,0 @@ -/* - * 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 "cryptlib.h" -#include <openssl/conf.h> -#include <openssl/asn1.h> -#include <openssl/asn1t.h> -#include <openssl/buffer.h> -#include <openssl/x509v3.h> - -#ifndef OPENSSL_NO_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 int 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) -{ - OPENSSL_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; - - if (bs->length < 0) - return 0; - switch (afi) { - case IANA_AFI_IPV4: - if (bs->length > 4) - return 0; - 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: - if (bs->length > 16) - return 0; - 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, ":"); - if (i == 0) - 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(const 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 int 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; - OPENSSL_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); - OPENSSL_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) -{ - OPENSSL_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_IPAddressOrRange_set(aors, i, merged); - sk_IPAddressOrRange_delete(aors, i + 1); - IPAddressOrRange_free(a); - IPAddressOrRange_free(b); - --i; - continue; - } - } - - return 1; -} - -/* - * Whack an IPAddrBlocks extension into canonical form. - */ -int v3_addr_canonize(IPAddrBlocks *addr) -{ - int i; - for (i = 0; i < sk_IPAddressFamily_num(addr); i++) { - IPAddressFamily *f = sk_IPAddressFamily_value(addr, i); - if (f->ipAddressChoice->type == IPAddressChoice_addressesOrRanges && - !IPAddressOrRanges_canonize(f->ipAddressChoice->u.addressesOrRanges, - v3_addr_get_afi(f))) - return 0; - } - sk_IPAddressFamily_set_cmp_func(addr, IPAddressFamily_cmp); - sk_IPAddressFamily_sort(addr); - OPENSSL_assert(v3_addr_is_canonical(addr)); - return 1; -} - -/* - * v2i handler for the IPAddrBlocks extension. - */ -static void *v2i_IPAddrBlocks(const struct v3_ext_method *method, - struct v3_ext_ctx *ctx, - STACK_OF(CONF_VALUE) *values) -{ - static const char v4addr_chars[] = "0123456789."; - static const char v6addr_chars[] = "0123456789.:abcdefABCDEF"; - IPAddrBlocks *addr = NULL; - char *s = NULL, *t; - int i; - - if ((addr = sk_IPAddressFamily_new(IPAddressFamily_cmp)) == NULL) { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE); - return NULL; - } - - for (i = 0; i < sk_CONF_VALUE_num(values); i++) { - CONF_VALUE *val = sk_CONF_VALUE_value(values, i); - unsigned char min[ADDR_RAW_BUF_LEN], max[ADDR_RAW_BUF_LEN]; - unsigned afi, *safi = NULL, safi_; - const char *addr_chars; - int prefixlen, i1, i2, delim, length; - - if ( !name_cmp(val->name, "IPv4")) { - afi = IANA_AFI_IPV4; - } else if (!name_cmp(val->name, "IPv6")) { - afi = IANA_AFI_IPV6; - } else if (!name_cmp(val->name, "IPv4-SAFI")) { - afi = IANA_AFI_IPV4; - safi = &safi_; - } else if (!name_cmp(val->name, "IPv6-SAFI")) { - afi = IANA_AFI_IPV6; - safi = &safi_; - } else { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_NAME_ERROR); - X509V3_conf_err(val); - goto err; - } - - switch (afi) { - case IANA_AFI_IPV4: - addr_chars = v4addr_chars; - break; - case IANA_AFI_IPV6: - addr_chars = v6addr_chars; - break; - } - - length = length_from_afi(afi); - - /* - * Handle SAFI, if any, and BUF_strdup() so we can null-terminate - * the other input values. - */ - if (safi != NULL) { - *safi = strtoul(val->value, &t, 0); - t += strspn(t, " \t"); - if (*safi > 0xFF || *t++ != ':') { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_SAFI); - X509V3_conf_err(val); - goto err; - } - t += strspn(t, " \t"); - s = BUF_strdup(t); - } else { - s = BUF_strdup(val->value); - } - if (s == NULL) { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE); - goto err; - } - - /* - * Check for inheritance. Not worth additional complexity to - * optimize this (seldom-used) case. - */ - if (!strcmp(s, "inherit")) { - if (!v3_addr_add_inherit(addr, afi, safi)) { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_INHERITANCE); - X509V3_conf_err(val); - goto err; - } - OPENSSL_free(s); - s = NULL; - continue; - } - - i1 = strspn(s, addr_chars); - i2 = i1 + strspn(s + i1, " \t"); - delim = s[i2++]; - s[i1] = '\0'; - - if (a2i_ipadd(min, s) != length) { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_IPADDRESS); - X509V3_conf_err(val); - goto err; - } - - switch (delim) { - case '/': - prefixlen = (int) strtoul(s + i2, &t, 10); - if (t == s + i2 || *t != '\0') { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR); - X509V3_conf_err(val); - goto err; - } - if (!v3_addr_add_prefix(addr, afi, safi, min, prefixlen)) { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE); - goto err; - } - break; - case '-': - i1 = i2 + strspn(s + i2, " \t"); - i2 = i1 + strspn(s + i1, addr_chars); - if (i1 == i2 || s[i2] != '\0') { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR); - X509V3_conf_err(val); - goto err; - } - if (a2i_ipadd(max, s + i1) != length) { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_INVALID_IPADDRESS); - X509V3_conf_err(val); - goto err; - } - if (!v3_addr_add_range(addr, afi, safi, min, max)) { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE); - goto err; - } - break; - case '\0': - if (!v3_addr_add_prefix(addr, afi, safi, min, length * 8)) { - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE); - goto err; - } - break; - default: - X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR); - X509V3_conf_err(val); - goto err; - } - - OPENSSL_free(s); - s = NULL; - } - - /* - * Canonize the result, then we're done. - */ - if (!v3_addr_canonize(addr)) - goto err; - return addr; - - err: - OPENSSL_free(s); - sk_IPAddressFamily_pop_free(addr, IPAddressFamily_free); - return NULL; -} - -/* - * OpenSSL dispatch - */ -const X509V3_EXT_METHOD v3_addr = { - NID_sbgp_ipAddrBlock, /* nid */ - 0, /* flags */ - ASN1_ITEM_ref(IPAddrBlocks), /* template */ - 0, 0, 0, 0, /* old functions, ignored */ - 0, /* i2s */ - 0, /* s2i */ - 0, /* i2v */ - v2i_IPAddrBlocks, /* v2i */ - i2r_IPAddrBlocks, /* i2r */ - 0, /* r2i */ - NULL /* extension-specific data */ -}; - -/* - * Figure out whether extension sues inheritance. - */ -int v3_addr_inherits(IPAddrBlocks *addr) -{ - int i; - if (addr == NULL) - return 0; - for (i = 0; i < sk_IPAddressFamily_num(addr); i++) { - IPAddressFamily *f = sk_IPAddressFamily_value(addr, i); - if (f->ipAddressChoice->type == IPAddressChoice_inherit) - return 1; - } - return 0; -} - -/* - * Figure out whether parent contains child. - */ -static int addr_contains(IPAddressOrRanges *parent, - IPAddressOrRanges *child, - int length) -{ - unsigned char p_min[ADDR_RAW_BUF_LEN], p_max[ADDR_RAW_BUF_LEN]; - unsigned char c_min[ADDR_RAW_BUF_LEN], c_max[ADDR_RAW_BUF_LEN]; - int p, c; - - if (child == NULL || parent == child) - return 1; - if (parent == NULL) - return 0; - - p = 0; - for (c = 0; c < sk_IPAddressOrRange_num(child); c++) { - extract_min_max(sk_IPAddressOrRange_value(child, c), - c_min, c_max, length); - for (;; p++) { - if (p >= sk_IPAddressOrRange_num(parent)) - return 0; - extract_min_max(sk_IPAddressOrRange_value(parent, p), - p_min, p_max, length); - if (memcmp(p_max, c_max, length) < 0) - continue; - if (memcmp(p_min, c_min, length) > 0) - return 0; - break; - } - } - - return 1; -} - -/* - * Test whether a is a subset of b. - */ -int v3_addr_subset(IPAddrBlocks *a, IPAddrBlocks *b) -{ - int i; - if (a == NULL || a == b) - return 1; - if (b == NULL || v3_addr_inherits(a) || v3_addr_inherits(b)) - return 0; - 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) - return 0; - if (!addr_contains(fb->ipAddressChoice->u.addressesOrRanges, - fa->ipAddressChoice->u.addressesOrRanges, - length_from_afi(v3_addr_get_afi(fb)))) - return 0; - } - return 1; -} - -/* - * Validation error handling via callback. - */ -#define validation_err(_err_) \ - do { \ - if (ctx != NULL) { \ - ctx->error = _err_; \ - ctx->error_depth = i; \ - ctx->current_cert = x; \ - ret = ctx->verify_cb(0, ctx); \ - } else { \ - ret = 0; \ - } \ - if (!ret) \ - goto done; \ - } while (0) - -/* - * Core code for RFC 3779 2.3 path validation. - */ -static int v3_addr_validate_path_internal(X509_STORE_CTX *ctx, - STACK_OF(X509) *chain, - IPAddrBlocks *ext) -{ - IPAddrBlocks *child = NULL; - int i, j, ret = 1; - X509 *x; - - OPENSSL_assert(chain != NULL && sk_X509_num(chain) > 0); - OPENSSL_assert(ctx != NULL || ext != NULL); - OPENSSL_assert(ctx == NULL || ctx->verify_cb != NULL); - - /* - * Figure out where to start. If we don't have an extension to - * check, we're done. Otherwise, check canonical form and - * set up for walking up the chain. - */ - if (ext != NULL) { - i = -1; - x = NULL; - } else { - i = 0; - x = sk_X509_value(chain, i); - OPENSSL_assert(x != NULL); - if ((ext = x->rfc3779_addr) == NULL) - goto done; - } - if (!v3_addr_is_canonical(ext)) - validation_err(X509_V_ERR_INVALID_EXTENSION); - sk_IPAddressFamily_set_cmp_func(ext, IPAddressFamily_cmp); - if ((child = sk_IPAddressFamily_dup(ext)) == NULL) { - X509V3err(X509V3_F_V3_ADDR_VALIDATE_PATH_INTERNAL, ERR_R_MALLOC_FAILURE); - ret = 0; - goto done; - } - - /* - * Now walk up the chain. No cert may list resources that its - * parent doesn't list. - */ - for (i++; i < sk_X509_num(chain); i++) { - x = sk_X509_value(chain, i); - OPENSSL_assert(x != NULL); - if (!v3_addr_is_canonical(x->rfc3779_addr)) - validation_err(X509_V_ERR_INVALID_EXTENSION); - if (x->rfc3779_addr == NULL) { - for (j = 0; j < sk_IPAddressFamily_num(child); j++) { - IPAddressFamily *fc = sk_IPAddressFamily_value(child, j); - if (fc->ipAddressChoice->type != IPAddressChoice_inherit) { - validation_err(X509_V_ERR_UNNESTED_RESOURCE); - break; - } - } - continue; - } - sk_IPAddressFamily_set_cmp_func(x->rfc3779_addr, IPAddressFamily_cmp); - for (j = 0; j < sk_IPAddressFamily_num(child); j++) { - IPAddressFamily *fc = sk_IPAddressFamily_value(child, j); - int k = sk_IPAddressFamily_find(x->rfc3779_addr, fc); - IPAddressFamily *fp = sk_IPAddressFamily_value(x->rfc3779_addr, k); - if (fp == NULL) { - if (fc->ipAddressChoice->type == IPAddressChoice_addressesOrRanges) { - validation_err(X509_V_ERR_UNNESTED_RESOURCE); - break; - } - continue; - } - if (fp->ipAddressChoice->type == IPAddressChoice_addressesOrRanges) { - if (fc->ipAddressChoice->type == IPAddressChoice_inherit || - addr_contains(fp->ipAddressChoice->u.addressesOrRanges, - fc->ipAddressChoice->u.addressesOrRanges, - length_from_afi(v3_addr_get_afi(fc)))) - sk_IPAddressFamily_set(child, j, fp); - else - validation_err(X509_V_ERR_UNNESTED_RESOURCE); - } - } - } - - /* - * Trust anchor can't inherit. - */ - OPENSSL_assert(x != NULL); - if (x->rfc3779_addr != NULL) { - for (j = 0; j < sk_IPAddressFamily_num(x->rfc3779_addr); j++) { - IPAddressFamily *fp = sk_IPAddressFamily_value(x->rfc3779_addr, j); - if (fp->ipAddressChoice->type == IPAddressChoice_inherit && - sk_IPAddressFamily_find(child, fp) >= 0) - validation_err(X509_V_ERR_UNNESTED_RESOURCE); - } - } - - done: - sk_IPAddressFamily_free(child); - return ret; -} - -#undef validation_err - -/* - * RFC 3779 2.3 path validation -- called from X509_verify_cert(). - */ -int v3_addr_validate_path(X509_STORE_CTX *ctx) -{ - return v3_addr_validate_path_internal(ctx, ctx->chain, NULL); -} - -/* - * RFC 3779 2.3 path validation of an extension. - * Test whether chain covers extension. - */ -int v3_addr_validate_resource_set(STACK_OF(X509) *chain, - IPAddrBlocks *ext, - int allow_inheritance) -{ - if (ext == NULL) - return 1; - if (chain == NULL || sk_X509_num(chain) == 0) - return 0; - if (!allow_inheritance && v3_addr_inherits(ext)) - return 0; - return v3_addr_validate_path_internal(NULL, chain, ext); -} - -#endif /* OPENSSL_NO_RFC3779 */ |