-Added OpenSSL and HTTPS support

-Built-in version of the library for Windows, Android and iOS (other OSs use system one)
-Small fixes all around

1 files changed, 890 insertions, 0 deletions

diff --git a/drivers/builtin_openssl/crypto/x509v3/v3_asid.c b/drivers/builtin_openssl/crypto/x509v3/v3_asid.c
new file mode 100644
index 0000000000..1587e8ed72
--- /dev/null
+++ b/drivers/builtin_openssl/crypto/x509v3/v3_asid.c
@@ -0,0 +1,890 @@
+/*
+ * 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 3.2.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "cryptlib.h"
+#include <openssl/conf.h>
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/x509v3.h>
+#include <openssl/x509.h>
+#include <openssl/bn.h>
+
+#ifndef OPENSSL_NO_RFC3779
+
+/*
+ * OpenSSL ASN.1 template translation of RFC 3779 3.2.3.
+ */
+
+ASN1_SEQUENCE(ASRange) = {
+  ASN1_SIMPLE(ASRange, min, ASN1_INTEGER),
+  ASN1_SIMPLE(ASRange, max, ASN1_INTEGER)
+} ASN1_SEQUENCE_END(ASRange)
+
+ASN1_CHOICE(ASIdOrRange) = {
+  ASN1_SIMPLE(ASIdOrRange, u.id,    ASN1_INTEGER),
+  ASN1_SIMPLE(ASIdOrRange, u.range, ASRange)
+} ASN1_CHOICE_END(ASIdOrRange)
+
+ASN1_CHOICE(ASIdentifierChoice) = {
+  ASN1_SIMPLE(ASIdentifierChoice,      u.inherit,       ASN1_NULL),
+  ASN1_SEQUENCE_OF(ASIdentifierChoice, u.asIdsOrRanges, ASIdOrRange)
+} ASN1_CHOICE_END(ASIdentifierChoice)
+
+ASN1_SEQUENCE(ASIdentifiers) = {
+  ASN1_EXP_OPT(ASIdentifiers, asnum, ASIdentifierChoice, 0),
+  ASN1_EXP_OPT(ASIdentifiers, rdi,   ASIdentifierChoice, 1)
+} ASN1_SEQUENCE_END(ASIdentifiers)
+
+IMPLEMENT_ASN1_FUNCTIONS(ASRange)
+IMPLEMENT_ASN1_FUNCTIONS(ASIdOrRange)
+IMPLEMENT_ASN1_FUNCTIONS(ASIdentifierChoice)
+IMPLEMENT_ASN1_FUNCTIONS(ASIdentifiers)
+
+/*
+ * i2r method for an ASIdentifierChoice.
+ */
+static int i2r_ASIdentifierChoice(BIO *out,
+				  ASIdentifierChoice *choice,
+				  int indent,
+				  const char *msg)
+{
+  int i;
+  char *s;
+  if (choice == NULL)
+    return 1;
+  BIO_printf(out, "%*s%s:\n", indent, "", msg);
+  switch (choice->type) {
+  case ASIdentifierChoice_inherit:
+    BIO_printf(out, "%*sinherit\n", indent + 2, "");
+    break;
+  case ASIdentifierChoice_asIdsOrRanges:
+    for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges); i++) {
+      ASIdOrRange *aor = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
+      switch (aor->type) {
+      case ASIdOrRange_id:
+	if ((s = i2s_ASN1_INTEGER(NULL, aor->u.id)) == NULL)
+	  return 0;
+	BIO_printf(out, "%*s%s\n", indent + 2, "", s);
+	OPENSSL_free(s);
+	break;
+      case ASIdOrRange_range:
+	if ((s = i2s_ASN1_INTEGER(NULL, aor->u.range->min)) == NULL)
+	  return 0;
+	BIO_printf(out, "%*s%s-", indent + 2, "", s);
+	OPENSSL_free(s);
+	if ((s = i2s_ASN1_INTEGER(NULL, aor->u.range->max)) == NULL)
+	  return 0;
+	BIO_printf(out, "%s\n", s);
+	OPENSSL_free(s);
+	break;
+      default:
+	return 0;
+      }
+    }
+    break;
+  default:
+    return 0;
+  }
+  return 1;
+}
+
+/*
+ * i2r method for an ASIdentifier extension.
+ */
+static int i2r_ASIdentifiers(const X509V3_EXT_METHOD *method,
+			     void *ext,
+			     BIO *out,
+			     int indent)
+{
+  ASIdentifiers *asid = ext;
+  return (i2r_ASIdentifierChoice(out, asid->asnum, indent,
+				 "Autonomous System Numbers") &&
+	  i2r_ASIdentifierChoice(out, asid->rdi, indent,
+				 "Routing Domain Identifiers"));
+}
+
+/*
+ * Sort comparision function for a sequence of ASIdOrRange elements.
+ */
+static int ASIdOrRange_cmp(const ASIdOrRange * const *a_,
+			   const ASIdOrRange * const *b_)
+{
+  const ASIdOrRange *a = *a_, *b = *b_;
+
+  OPENSSL_assert((a->type == ASIdOrRange_id && a->u.id != NULL) ||
+	 (a->type == ASIdOrRange_range && a->u.range != NULL &&
+	  a->u.range->min != NULL && a->u.range->max != NULL));
+
+  OPENSSL_assert((b->type == ASIdOrRange_id && b->u.id != NULL) ||
+	 (b->type == ASIdOrRange_range && b->u.range != NULL &&
+	  b->u.range->min != NULL && b->u.range->max != NULL));
+
+  if (a->type == ASIdOrRange_id && b->type == ASIdOrRange_id)
+    return ASN1_INTEGER_cmp(a->u.id, b->u.id);
+
+  if (a->type == ASIdOrRange_range && b->type == ASIdOrRange_range) {
+    int r = ASN1_INTEGER_cmp(a->u.range->min, b->u.range->min);
+    return r != 0 ? r : ASN1_INTEGER_cmp(a->u.range->max, b->u.range->max);
+  }
+
+  if (a->type == ASIdOrRange_id)
+    return ASN1_INTEGER_cmp(a->u.id, b->u.range->min);
+  else
+    return ASN1_INTEGER_cmp(a->u.range->min, b->u.id);
+}
+
+/*
+ * Add an inherit element.
+ */
+int v3_asid_add_inherit(ASIdentifiers *asid, int which)
+{
+  ASIdentifierChoice **choice;
+  if (asid == NULL)
+    return 0;
+  switch (which) {
+  case V3_ASID_ASNUM:
+    choice = &asid->asnum;
+    break;
+  case V3_ASID_RDI:
+    choice = &asid->rdi;
+    break;
+  default:
+    return 0;
+  }
+  if (*choice == NULL) {
+    if ((*choice = ASIdentifierChoice_new()) == NULL)
+      return 0;
+    OPENSSL_assert((*choice)->u.inherit == NULL);
+    if (((*choice)->u.inherit = ASN1_NULL_new()) == NULL)
+      return 0;
+    (*choice)->type = ASIdentifierChoice_inherit;
+  }
+  return (*choice)->type == ASIdentifierChoice_inherit;
+}
+
+/*
+ * Add an ID or range to an ASIdentifierChoice.
+ */
+int v3_asid_add_id_or_range(ASIdentifiers *asid,
+			    int which,
+			    ASN1_INTEGER *min,
+			    ASN1_INTEGER *max)
+{
+  ASIdentifierChoice **choice;
+  ASIdOrRange *aor;
+  if (asid == NULL)
+    return 0;
+  switch (which) {
+  case V3_ASID_ASNUM:
+    choice = &asid->asnum;
+    break;
+  case V3_ASID_RDI:
+    choice = &asid->rdi;
+    break;
+  default:
+    return 0;
+  }
+  if (*choice != NULL && (*choice)->type == ASIdentifierChoice_inherit)
+    return 0;
+  if (*choice == NULL) {
+    if ((*choice = ASIdentifierChoice_new()) == NULL)
+      return 0;
+    OPENSSL_assert((*choice)->u.asIdsOrRanges == NULL);
+    (*choice)->u.asIdsOrRanges = sk_ASIdOrRange_new(ASIdOrRange_cmp);
+    if ((*choice)->u.asIdsOrRanges == NULL)
+      return 0;
+    (*choice)->type = ASIdentifierChoice_asIdsOrRanges;
+  }
+  if ((aor = ASIdOrRange_new()) == NULL)
+    return 0;
+  if (max == NULL) {
+    aor->type = ASIdOrRange_id;
+    aor->u.id = min;
+  } else {
+    aor->type = ASIdOrRange_range;
+    if ((aor->u.range = ASRange_new()) == NULL)
+      goto err;
+    ASN1_INTEGER_free(aor->u.range->min);
+    aor->u.range->min = min;
+    ASN1_INTEGER_free(aor->u.range->max);
+    aor->u.range->max = max;
+  }
+  if (!(sk_ASIdOrRange_push((*choice)->u.asIdsOrRanges, aor)))
+    goto err;
+  return 1;
+
+ err:
+  ASIdOrRange_free(aor);
+  return 0;
+}
+
+/*
+ * Extract min and max values from an ASIdOrRange.
+ */
+static void extract_min_max(ASIdOrRange *aor,
+			    ASN1_INTEGER **min,
+			    ASN1_INTEGER **max)
+{
+  OPENSSL_assert(aor != NULL && min != NULL && max != NULL);
+  switch (aor->type) {
+  case ASIdOrRange_id:
+    *min = aor->u.id;
+    *max = aor->u.id;
+    return;
+  case ASIdOrRange_range:
+    *min = aor->u.range->min;
+    *max = aor->u.range->max;
+    return;
+  }
+}
+
+/*
+ * Check whether an ASIdentifierChoice is in canonical form.
+ */
+static int ASIdentifierChoice_is_canonical(ASIdentifierChoice *choice)
+{
+  ASN1_INTEGER *a_max_plus_one = NULL;
+  BIGNUM *bn = NULL;
+  int i, ret = 0;
+
+  /*
+   * Empty element or inheritance is canonical.
+   */
+  if (choice == NULL || choice->type == ASIdentifierChoice_inherit)
+    return 1;
+
+  /*
+   * If not a list, or if empty list, it's broken.
+   */
+  if (choice->type != ASIdentifierChoice_asIdsOrRanges ||
+      sk_ASIdOrRange_num(choice->u.asIdsOrRanges) == 0)
+    return 0;
+
+  /*
+   * It's a list, check it.
+   */
+  for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) {
+    ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
+    ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i + 1);
+    ASN1_INTEGER *a_min, *a_max, *b_min, *b_max;
+
+    extract_min_max(a, &a_min, &a_max);
+    extract_min_max(b, &b_min, &b_max);
+
+    /*
+     * Punt misordered list, overlapping start, or inverted range.
+     */
+    if (ASN1_INTEGER_cmp(a_min, b_min) >= 0 ||
+	ASN1_INTEGER_cmp(a_min, a_max) > 0 ||
+	ASN1_INTEGER_cmp(b_min, b_max) > 0)
+      goto done;
+
+    /*
+     * Calculate a_max + 1 to check for adjacency.
+     */
+    if ((bn == NULL && (bn = BN_new()) == NULL) ||
+	ASN1_INTEGER_to_BN(a_max, bn) == NULL ||
+	!BN_add_word(bn, 1) ||
+	(a_max_plus_one = BN_to_ASN1_INTEGER(bn, a_max_plus_one)) == NULL) {
+      X509V3err(X509V3_F_ASIDENTIFIERCHOICE_IS_CANONICAL,
+		ERR_R_MALLOC_FAILURE);
+      goto done;
+    }
+    
+    /*
+     * Punt if adjacent or overlapping.
+     */
+    if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) >= 0)
+      goto done;
+  }
+
+  /*
+   * Check for inverted range.
+   */
+  i = sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1;
+  {
+    ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
+    ASN1_INTEGER *a_min, *a_max;
+    if (a != NULL && a->type == ASIdOrRange_range) {
+      extract_min_max(a, &a_min, &a_max);
+      if (ASN1_INTEGER_cmp(a_min, a_max) > 0)
+	goto done;
+    }
+  }
+
+  ret = 1;
+
+ done:
+  ASN1_INTEGER_free(a_max_plus_one);
+  BN_free(bn);
+  return ret;
+}
+
+/*
+ * Check whether an ASIdentifier extension is in canonical form.
+ */
+int v3_asid_is_canonical(ASIdentifiers *asid)
+{
+  return (asid == NULL ||
+	  (ASIdentifierChoice_is_canonical(asid->asnum) &&
+	   ASIdentifierChoice_is_canonical(asid->rdi)));
+}
+
+/*
+ * Whack an ASIdentifierChoice into canonical form.
+ */
+static int ASIdentifierChoice_canonize(ASIdentifierChoice *choice)
+{
+  ASN1_INTEGER *a_max_plus_one = NULL;
+  BIGNUM *bn = NULL;
+  int i, ret = 0;
+
+  /*
+   * Nothing to do for empty element or inheritance.
+   */
+  if (choice == NULL || choice->type == ASIdentifierChoice_inherit)
+    return 1;
+
+  /*
+   * If not a list, or if empty list, it's broken.
+   */
+  if (choice->type != ASIdentifierChoice_asIdsOrRanges ||
+      sk_ASIdOrRange_num(choice->u.asIdsOrRanges) == 0) {
+    X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
+	      X509V3_R_EXTENSION_VALUE_ERROR);
+    return 0;
+  }
+
+  /*
+   * We have a non-empty list.  Sort it.
+   */
+  sk_ASIdOrRange_sort(choice->u.asIdsOrRanges);
+
+  /*
+   * Now check for errors and suboptimal encoding, rejecting the
+   * former and fixing the latter.
+   */
+  for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) {
+    ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
+    ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i + 1);
+    ASN1_INTEGER *a_min, *a_max, *b_min, *b_max;
+
+    extract_min_max(a, &a_min, &a_max);
+    extract_min_max(b, &b_min, &b_max);
+
+    /*
+     * Make sure we're properly sorted (paranoia).
+     */
+    OPENSSL_assert(ASN1_INTEGER_cmp(a_min, b_min) <= 0);
+
+    /*
+     * Punt inverted ranges.
+     */
+    if (ASN1_INTEGER_cmp(a_min, a_max) > 0 ||
+	ASN1_INTEGER_cmp(b_min, b_max) > 0)
+      goto done;
+
+    /*
+     * Check for overlaps.
+     */
+    if (ASN1_INTEGER_cmp(a_max, b_min) >= 0) {
+      X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
+		X509V3_R_EXTENSION_VALUE_ERROR);
+      goto done;
+    }
+
+    /*
+     * Calculate a_max + 1 to check for adjacency.
+     */
+    if ((bn == NULL && (bn = BN_new()) == NULL) ||
+	ASN1_INTEGER_to_BN(a_max, bn) == NULL ||
+	!BN_add_word(bn, 1) ||
+	(a_max_plus_one = BN_to_ASN1_INTEGER(bn, a_max_plus_one)) == NULL) {
+      X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE, ERR_R_MALLOC_FAILURE);
+      goto done;
+    }
+    
+    /*
+     * If a and b are adjacent, merge them.
+     */
+    if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) == 0) {
+      ASRange *r;
+      switch (a->type) {
+      case ASIdOrRange_id:
+	if ((r = OPENSSL_malloc(sizeof(ASRange))) == NULL) {
+	  X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
+		    ERR_R_MALLOC_FAILURE);
+	  goto done;
+	}
+	r->min = a_min;
+	r->max = b_max;
+	a->type = ASIdOrRange_range;
+	a->u.range = r;
+	break;
+      case ASIdOrRange_range:
+	ASN1_INTEGER_free(a->u.range->max);
+	a->u.range->max = b_max;
+	break;
+      }
+      switch (b->type) {
+      case ASIdOrRange_id:
+	b->u.id = NULL;
+	break;
+      case ASIdOrRange_range:
+	b->u.range->max = NULL;
+	break;
+      }
+      ASIdOrRange_free(b);
+      (void) sk_ASIdOrRange_delete(choice->u.asIdsOrRanges, i + 1);
+      i--;
+      continue;
+    }
+  }
+
+  /*
+   * Check for final inverted range.
+   */
+  i = sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1;
+  {
+    ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
+    ASN1_INTEGER *a_min, *a_max;
+    if (a != NULL && a->type == ASIdOrRange_range) {
+      extract_min_max(a, &a_min, &a_max);
+      if (ASN1_INTEGER_cmp(a_min, a_max) > 0)
+	goto done;
+    }
+  }
+
+  OPENSSL_assert(ASIdentifierChoice_is_canonical(choice)); /* Paranoia */
+
+  ret = 1;
+
+ done:
+  ASN1_INTEGER_free(a_max_plus_one);
+  BN_free(bn);
+  return ret;
+}
+
+/*
+ * Whack an ASIdentifier extension into canonical form.
+ */
+int v3_asid_canonize(ASIdentifiers *asid)
+{
+  return (asid == NULL ||
+	  (ASIdentifierChoice_canonize(asid->asnum) &&
+	   ASIdentifierChoice_canonize(asid->rdi)));
+}
+
+/*
+ * v2i method for an ASIdentifier extension.
+ */
+static void *v2i_ASIdentifiers(const struct v3_ext_method *method,
+			       struct v3_ext_ctx *ctx,
+			       STACK_OF(CONF_VALUE) *values)
+{
+  ASN1_INTEGER *min = NULL, *max = NULL;
+  ASIdentifiers *asid = NULL;
+  int i;
+
+  if ((asid = ASIdentifiers_new()) == NULL) {
+    X509V3err(X509V3_F_V2I_ASIDENTIFIERS, 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);
+    int i1, i2, i3, is_range, which;
+
+    /*
+     * Figure out whether this is an AS or an RDI.
+     */
+    if (       !name_cmp(val->name, "AS")) {
+      which = V3_ASID_ASNUM;
+    } else if (!name_cmp(val->name, "RDI")) {
+      which = V3_ASID_RDI;
+    } else {
+      X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_EXTENSION_NAME_ERROR);
+      X509V3_conf_err(val);
+      goto err;
+    }
+
+    /*
+     * Handle inheritance.
+     */
+    if (!strcmp(val->value, "inherit")) {
+      if (v3_asid_add_inherit(asid, which))
+	continue;
+      X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_INVALID_INHERITANCE);
+      X509V3_conf_err(val);
+      goto err;
+    }
+
+    /*
+     * Number, range, or mistake, pick it apart and figure out which.
+     */
+    i1 = strspn(val->value, "0123456789");
+    if (val->value[i1] == '\0') {
+      is_range = 0;
+    } else {
+      is_range = 1;
+      i2 = i1 + strspn(val->value + i1, " \t");
+      if (val->value[i2] != '-') {
+	X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_INVALID_ASNUMBER);
+	X509V3_conf_err(val);
+	goto err;
+      }
+      i2++;
+      i2 = i2 + strspn(val->value + i2, " \t");
+      i3 = i2 + strspn(val->value + i2, "0123456789");
+      if (val->value[i3] != '\0') {
+	X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_INVALID_ASRANGE);
+	X509V3_conf_err(val);
+	goto err;
+      }
+    }
+
+    /*
+     * Syntax is ok, read and add it.
+     */
+    if (!is_range) {
+      if (!X509V3_get_value_int(val, &min)) {
+	X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
+	goto err;
+      }
+    } else {
+      char *s = BUF_strdup(val->value);
+      if (s == NULL) {
+	X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
+	goto err;
+      }
+      s[i1] = '\0';
+      min = s2i_ASN1_INTEGER(NULL, s);
+      max = s2i_ASN1_INTEGER(NULL, s + i2);
+      OPENSSL_free(s);
+      if (min == NULL || max == NULL) {
+	X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
+	goto err;
+      }
+      if (ASN1_INTEGER_cmp(min, max) > 0) {
+	X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_EXTENSION_VALUE_ERROR);
+	goto err;
+      }
+    }
+    if (!v3_asid_add_id_or_range(asid, which, min, max)) {
+      X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
+      goto err;
+    }
+    min = max = NULL;
+  }
+
+  /*
+   * Canonize the result, then we're done.
+   */
+  if (!v3_asid_canonize(asid))
+    goto err;
+  return asid;
+
+ err:
+  ASIdentifiers_free(asid);
+  ASN1_INTEGER_free(min);
+  ASN1_INTEGER_free(max);
+  return NULL;
+}
+
+/*
+ * OpenSSL dispatch.
+ */
+const X509V3_EXT_METHOD v3_asid = {
+  NID_sbgp_autonomousSysNum,	/* nid */
+  0,				/* flags */
+  ASN1_ITEM_ref(ASIdentifiers),	/* template */
+  0, 0, 0, 0,			/* old functions, ignored */
+  0,				/* i2s */
+  0,				/* s2i */
+  0,				/* i2v */
+  v2i_ASIdentifiers,		/* v2i */
+  i2r_ASIdentifiers,		/* i2r */
+  0,				/* r2i */
+  NULL				/* extension-specific data */
+};
+
+/*
+ * Figure out whether extension uses inheritance.
+ */
+int v3_asid_inherits(ASIdentifiers *asid)
+{
+  return (asid != NULL &&
+	  ((asid->asnum != NULL &&
+	    asid->asnum->type == ASIdentifierChoice_inherit) ||
+	   (asid->rdi != NULL &&
+	    asid->rdi->type == ASIdentifierChoice_inherit)));
+}
+
+/*
+ * Figure out whether parent contains child.
+ */
+static int asid_contains(ASIdOrRanges *parent, ASIdOrRanges *child)
+{
+  ASN1_INTEGER *p_min, *p_max, *c_min, *c_max;
+  int p, c;
+
+  if (child == NULL || parent == child)
+    return 1;
+  if (parent == NULL)
+    return 0;
+
+  p = 0;
+  for (c = 0; c < sk_ASIdOrRange_num(child); c++) {
+    extract_min_max(sk_ASIdOrRange_value(child, c), &c_min, &c_max);
+    for (;; p++) {
+      if (p >= sk_ASIdOrRange_num(parent))
+	return 0;
+      extract_min_max(sk_ASIdOrRange_value(parent, p), &p_min, &p_max);
+      if (ASN1_INTEGER_cmp(p_max, c_max) < 0)
+	continue;
+      if (ASN1_INTEGER_cmp(p_min, c_min) > 0)
+	return 0;
+      break;
+    }
+  }
+
+  return 1;
+}
+
+/*
+ * Test whether a is a subet of b.
+ */
+int v3_asid_subset(ASIdentifiers *a, ASIdentifiers *b)
+{
+  return (a == NULL ||
+	  a == b ||
+	  (b != NULL &&
+	   !v3_asid_inherits(a) &&
+	   !v3_asid_inherits(b) &&
+	   asid_contains(b->asnum->u.asIdsOrRanges,
+			 a->asnum->u.asIdsOrRanges) &&
+	   asid_contains(b->rdi->u.asIdsOrRanges,
+			 a->rdi->u.asIdsOrRanges)));
+}
+
+/*
+ * 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 3.3 path validation.
+ */
+static int v3_asid_validate_path_internal(X509_STORE_CTX *ctx,
+					  STACK_OF(X509) *chain,
+					  ASIdentifiers *ext)
+{
+  ASIdOrRanges *child_as = NULL, *child_rdi = NULL;
+  int i, ret = 1, inherit_as = 0, inherit_rdi = 0;
+  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_asid) == NULL)
+      goto done;
+  }
+  if (!v3_asid_is_canonical(ext))
+    validation_err(X509_V_ERR_INVALID_EXTENSION);
+  if (ext->asnum != NULL)  {
+    switch (ext->asnum->type) {
+    case ASIdentifierChoice_inherit:
+      inherit_as = 1;
+      break;
+    case ASIdentifierChoice_asIdsOrRanges:
+      child_as = ext->asnum->u.asIdsOrRanges;
+      break;
+    }
+  }
+  if (ext->rdi != NULL) {
+    switch (ext->rdi->type) {
+    case ASIdentifierChoice_inherit:
+      inherit_rdi = 1;
+      break;
+    case ASIdentifierChoice_asIdsOrRanges:
+      child_rdi = ext->rdi->u.asIdsOrRanges;
+      break;
+    }
+  }
+
+  /*
+   * Now walk up the chain.  Extensions must be in canonical form, 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 (x->rfc3779_asid == NULL) {
+      if (child_as != NULL || child_rdi != NULL)
+	validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+      continue;
+    }
+    if (!v3_asid_is_canonical(x->rfc3779_asid))
+      validation_err(X509_V_ERR_INVALID_EXTENSION);
+    if (x->rfc3779_asid->asnum == NULL && child_as != NULL) {
+      validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+      child_as = NULL;
+      inherit_as = 0;
+    }
+    if (x->rfc3779_asid->asnum != NULL &&
+	x->rfc3779_asid->asnum->type == ASIdentifierChoice_asIdsOrRanges) {
+      if (inherit_as ||
+	  asid_contains(x->rfc3779_asid->asnum->u.asIdsOrRanges, child_as)) {
+	child_as = x->rfc3779_asid->asnum->u.asIdsOrRanges;
+	inherit_as = 0;
+      } else {
+	validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+      }
+    }
+    if (x->rfc3779_asid->rdi == NULL && child_rdi != NULL) {
+      validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+      child_rdi = NULL;
+      inherit_rdi = 0;
+    }
+    if (x->rfc3779_asid->rdi != NULL &&
+	x->rfc3779_asid->rdi->type == ASIdentifierChoice_asIdsOrRanges) {
+      if (inherit_rdi ||
+	  asid_contains(x->rfc3779_asid->rdi->u.asIdsOrRanges, child_rdi)) {
+	child_rdi = x->rfc3779_asid->rdi->u.asIdsOrRanges;
+	inherit_rdi = 0;
+      } else {
+	validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+      }
+    }
+  }
+
+  /*
+   * Trust anchor can't inherit.
+   */
+  OPENSSL_assert(x != NULL);
+  if (x->rfc3779_asid != NULL) {
+    if (x->rfc3779_asid->asnum != NULL &&
+	x->rfc3779_asid->asnum->type == ASIdentifierChoice_inherit)
+      validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+    if (x->rfc3779_asid->rdi != NULL &&
+	x->rfc3779_asid->rdi->type == ASIdentifierChoice_inherit)
+      validation_err(X509_V_ERR_UNNESTED_RESOURCE);
+  }
+
+ done:
+  return ret;
+}
+
+#undef validation_err
+
+/*
+ * RFC 3779 3.3 path validation -- called from X509_verify_cert().
+ */
+int v3_asid_validate_path(X509_STORE_CTX *ctx)
+{
+  return v3_asid_validate_path_internal(ctx, ctx->chain, NULL);
+}
+
+/*
+ * RFC 3779 3.3 path validation of an extension.
+ * Test whether chain covers extension.
+ */
+int v3_asid_validate_resource_set(STACK_OF(X509) *chain,
+				  ASIdentifiers *ext,
+				  int allow_inheritance)
+{
+  if (ext == NULL)
+    return 1;
+  if (chain == NULL || sk_X509_num(chain) == 0)
+    return 0;
+  if (!allow_inheritance && v3_asid_inherits(ext))
+    return 0;
+  return v3_asid_validate_path_internal(NULL, chain, ext);
+}
+
+#endif /* OPENSSL_NO_RFC3779 */