Import upstream version 0.9+1465500757.14a5905

1 files changed, 398 insertions, 140 deletions

diff --git a/Cryptlib/OpenSSL/crypto/x509v3/v3_ncons.c b/Cryptlib/OpenSSL/crypto/x509v3/v3_ncons.c
index 624fe7e2..b97ed271 100644
--- a/Cryptlib/OpenSSL/crypto/x509v3/v3_ncons.c
+++ b/Cryptlib/OpenSSL/crypto/x509v3/v3_ncons.c
@@ -1,5 +1,6 @@
 /* v3_ncons.c */
-/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project.
  */
 /* ====================================================================
@@ -10,7 +11,7 @@
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
+ *    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
@@ -56,164 +57,421 @@
  *
  */
 
-
 #include <stdio.h>
 #include "cryptlib.h"
 #include <openssl/asn1t.h>
 #include <openssl/conf.h>
 #include <openssl/x509v3.h>
 
-static void *v2i_NAME_CONSTRAINTS(X509V3_EXT_METHOD *method,
-				X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval);
-static int i2r_NAME_CONSTRAINTS(X509V3_EXT_METHOD *method, 
-				void *a, BIO *bp, int ind);
-static int do_i2r_name_constraints(X509V3_EXT_METHOD *method,
-				STACK_OF(GENERAL_SUBTREE) *trees,
-					BIO *bp, int ind, char *name);
+static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
+                                  X509V3_CTX *ctx,
+                                  STACK_OF(CONF_VALUE) *nval);
+static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,
+                                BIO *bp, int ind);
+static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
+                                   STACK_OF(GENERAL_SUBTREE) *trees, BIO *bp,
+                                   int ind, char *name);
 static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip);
 
+static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc);
+static int nc_match_single(GENERAL_NAME *sub, GENERAL_NAME *gen);
+static int nc_dn(X509_NAME *sub, X509_NAME *nm);
+static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns);
+static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml);
+static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base);
+
 const X509V3_EXT_METHOD v3_name_constraints = {
-	NID_name_constraints, 0,
-	ASN1_ITEM_ref(NAME_CONSTRAINTS),
-	0,0,0,0,
-	0,0,
-	0, v2i_NAME_CONSTRAINTS,
-	i2r_NAME_CONSTRAINTS,0,
-	NULL
+    NID_name_constraints, 0,
+    ASN1_ITEM_ref(NAME_CONSTRAINTS),
+    0, 0, 0, 0,
+    0, 0,
+    0, v2i_NAME_CONSTRAINTS,
+    i2r_NAME_CONSTRAINTS, 0,
+    NULL
 };
 
 ASN1_SEQUENCE(GENERAL_SUBTREE) = {
-	ASN1_SIMPLE(GENERAL_SUBTREE, base, GENERAL_NAME),
-	ASN1_IMP_OPT(GENERAL_SUBTREE, minimum, ASN1_INTEGER, 0),
-	ASN1_IMP_OPT(GENERAL_SUBTREE, maximum, ASN1_INTEGER, 1)
+        ASN1_SIMPLE(GENERAL_SUBTREE, base, GENERAL_NAME),
+        ASN1_IMP_OPT(GENERAL_SUBTREE, minimum, ASN1_INTEGER, 0),
+        ASN1_IMP_OPT(GENERAL_SUBTREE, maximum, ASN1_INTEGER, 1)
 } ASN1_SEQUENCE_END(GENERAL_SUBTREE)
 
 ASN1_SEQUENCE(NAME_CONSTRAINTS) = {
-	ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, permittedSubtrees,
-							GENERAL_SUBTREE, 0),
-	ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, excludedSubtrees,
-							GENERAL_SUBTREE, 1),
+        ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, permittedSubtrees,
+                                                        GENERAL_SUBTREE, 0),
+        ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, excludedSubtrees,
+                                                        GENERAL_SUBTREE, 1),
 } ASN1_SEQUENCE_END(NAME_CONSTRAINTS)
-	
+
 
 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(GENERAL_SUBTREE)
 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(NAME_CONSTRAINTS)
 
-static void *v2i_NAME_CONSTRAINTS(X509V3_EXT_METHOD *method,
-				X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
-	{
-	int i;
-	CONF_VALUE tval, *val;
-	STACK_OF(GENERAL_SUBTREE) **ptree = NULL;
-	NAME_CONSTRAINTS *ncons = NULL;
-	GENERAL_SUBTREE *sub = NULL;
-	ncons = NAME_CONSTRAINTS_new();
-	if (!ncons)
-		goto memerr;
-	for(i = 0; i < sk_CONF_VALUE_num(nval); i++)
-		{
-		val = sk_CONF_VALUE_value(nval, i);
-		if (!strncmp(val->name, "permitted", 9) && val->name[9])
-			{
-			ptree = &ncons->permittedSubtrees;
-			tval.name = val->name + 10;
-			}
-		else if (!strncmp(val->name, "excluded", 8) && val->name[8])
-			{
-			ptree = &ncons->excludedSubtrees;
-			tval.name = val->name + 9;
-			}
-		else
-			{
-			X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, X509V3_R_INVALID_SYNTAX);
-			goto err;
-			}
-		tval.value = val->value;
-		sub = GENERAL_SUBTREE_new();
-		if (!v2i_GENERAL_NAME_ex(sub->base, method, ctx, &tval, 1))
-			goto err;
-		if (!*ptree)
-			*ptree = sk_GENERAL_SUBTREE_new_null();
-		if (!*ptree || !sk_GENERAL_SUBTREE_push(*ptree, sub))
-			goto memerr;
-		sub = NULL;
-		}
-
-	return ncons;
-
-	memerr:
-	X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, ERR_R_MALLOC_FAILURE);
-	err:
-	if (ncons)
-		NAME_CONSTRAINTS_free(ncons);
-	if (sub)
-		GENERAL_SUBTREE_free(sub);
-
-	return NULL;
-	}
-			
-
-	
-
-static int i2r_NAME_CONSTRAINTS(X509V3_EXT_METHOD *method,
-				void *a, BIO *bp, int ind)
-	{
-	NAME_CONSTRAINTS *ncons = a;
-	do_i2r_name_constraints(method, ncons->permittedSubtrees,
-					bp, ind, "Permitted");
-	do_i2r_name_constraints(method, ncons->excludedSubtrees,
-					bp, ind, "Excluded");
-	return 1;
-	}
-
-static int do_i2r_name_constraints(X509V3_EXT_METHOD *method,
-				STACK_OF(GENERAL_SUBTREE) *trees,
-					BIO *bp, int ind, char *name)
-	{
-	GENERAL_SUBTREE *tree;
-	int i;
-	if (sk_GENERAL_SUBTREE_num(trees) > 0)
-		BIO_printf(bp, "%*s%s:\n", ind, "", name);
-	for(i = 0; i < sk_GENERAL_SUBTREE_num(trees); i++)
-		{
-		tree = sk_GENERAL_SUBTREE_value(trees, i);
-		BIO_printf(bp, "%*s", ind + 2, "");
-		if (tree->base->type == GEN_IPADD)
-			print_nc_ipadd(bp, tree->base->d.ip);
-		else
-			GENERAL_NAME_print(bp, tree->base);
-		BIO_puts(bp, "\n");
-		}
-	return 1;
-	}
+static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
+                                  X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
+{
+    int i;
+    CONF_VALUE tval, *val;
+    STACK_OF(GENERAL_SUBTREE) **ptree = NULL;
+    NAME_CONSTRAINTS *ncons = NULL;
+    GENERAL_SUBTREE *sub = NULL;
+    ncons = NAME_CONSTRAINTS_new();
+    if (!ncons)
+        goto memerr;
+    for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
+        val = sk_CONF_VALUE_value(nval, i);
+        if (!strncmp(val->name, "permitted", 9) && val->name[9]) {
+            ptree = &ncons->permittedSubtrees;
+            tval.name = val->name + 10;
+        } else if (!strncmp(val->name, "excluded", 8) && val->name[8]) {
+            ptree = &ncons->excludedSubtrees;
+            tval.name = val->name + 9;
+        } else {
+            X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, X509V3_R_INVALID_SYNTAX);
+            goto err;
+        }
+        tval.value = val->value;
+        sub = GENERAL_SUBTREE_new();
+        if (!v2i_GENERAL_NAME_ex(sub->base, method, ctx, &tval, 1))
+            goto err;
+        if (!*ptree)
+            *ptree = sk_GENERAL_SUBTREE_new_null();
+        if (!*ptree || !sk_GENERAL_SUBTREE_push(*ptree, sub))
+            goto memerr;
+        sub = NULL;
+    }
+
+    return ncons;
+
+ memerr:
+    X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, ERR_R_MALLOC_FAILURE);
+ err:
+    if (ncons)
+        NAME_CONSTRAINTS_free(ncons);
+    if (sub)
+        GENERAL_SUBTREE_free(sub);
+
+    return NULL;
+}
+
+static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,
+                                BIO *bp, int ind)
+{
+    NAME_CONSTRAINTS *ncons = a;
+    do_i2r_name_constraints(method, ncons->permittedSubtrees,
+                            bp, ind, "Permitted");
+    do_i2r_name_constraints(method, ncons->excludedSubtrees,
+                            bp, ind, "Excluded");
+    return 1;
+}
+
+static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
+                                   STACK_OF(GENERAL_SUBTREE) *trees,
+                                   BIO *bp, int ind, char *name)
+{
+    GENERAL_SUBTREE *tree;
+    int i;
+    if (sk_GENERAL_SUBTREE_num(trees) > 0)
+        BIO_printf(bp, "%*s%s:\n", ind, "", name);
+    for (i = 0; i < sk_GENERAL_SUBTREE_num(trees); i++) {
+        tree = sk_GENERAL_SUBTREE_value(trees, i);
+        BIO_printf(bp, "%*s", ind + 2, "");
+        if (tree->base->type == GEN_IPADD)
+            print_nc_ipadd(bp, tree->base->d.ip);
+        else
+            GENERAL_NAME_print(bp, tree->base);
+        BIO_puts(bp, "\n");
+    }
+    return 1;
+}
 
 static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip)
-	{
-	int i, len;
-	unsigned char *p;
-	p = ip->data;
-	len = ip->length;
-	BIO_puts(bp, "IP:");
-	if(len == 8)
-		{
-		BIO_printf(bp, "%d.%d.%d.%d/%d.%d.%d.%d",
-				p[0], p[1], p[2], p[3],
-				p[4], p[5], p[6], p[7]);
-		}
-	else if(len == 32)
-		{
-		for (i = 0; i < 16; i++)
-			{
-			BIO_printf(bp, "%X", p[0] << 8 | p[1]);
-			p += 2;
-			if (i == 7)
-				BIO_puts(bp, "/");
-			else if (i != 15)
-				BIO_puts(bp, ":");
-			}
-		}
-	else
-		BIO_printf(bp, "IP Address:<invalid>");
-	return 1;
-	}
+{
+    int i, len;
+    unsigned char *p;
+    p = ip->data;
+    len = ip->length;
+    BIO_puts(bp, "IP:");
+    if (len == 8) {
+        BIO_printf(bp, "%d.%d.%d.%d/%d.%d.%d.%d",
+                   p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
+    } else if (len == 32) {
+        for (i = 0; i < 16; i++) {
+            BIO_printf(bp, "%X", p[0] << 8 | p[1]);
+            p += 2;
+            if (i == 7)
+                BIO_puts(bp, "/");
+            else if (i != 15)
+                BIO_puts(bp, ":");
+        }
+    } else
+        BIO_printf(bp, "IP Address:<invalid>");
+    return 1;
+}
+
+/*-
+ * Check a certificate conforms to a specified set of constraints.
+ * Return values:
+ *  X509_V_OK: All constraints obeyed.
+ *  X509_V_ERR_PERMITTED_VIOLATION: Permitted subtree violation.
+ *  X509_V_ERR_EXCLUDED_VIOLATION: Excluded subtree violation.
+ *  X509_V_ERR_SUBTREE_MINMAX: Min or max values present and matching type.
+ *  X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE:  Unsupported constraint type.
+ *  X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: bad unsupported constraint syntax.
+ *  X509_V_ERR_UNSUPPORTED_NAME_SYNTAX: bad or unsupported syntax of name
+ */
+
+int NAME_CONSTRAINTS_check(X509 *x, NAME_CONSTRAINTS *nc)
+{
+    int r, i;
+    X509_NAME *nm;
+
+    nm = X509_get_subject_name(x);
+
+    if (X509_NAME_entry_count(nm) > 0) {
+        GENERAL_NAME gntmp;
+        gntmp.type = GEN_DIRNAME;
+        gntmp.d.directoryName = nm;
+
+        r = nc_match(&gntmp, nc);
+
+        if (r != X509_V_OK)
+            return r;
+
+        gntmp.type = GEN_EMAIL;
+
+        /* Process any email address attributes in subject name */
+
+        for (i = -1;;) {
+            X509_NAME_ENTRY *ne;
+            i = X509_NAME_get_index_by_NID(nm, NID_pkcs9_emailAddress, i);
+            if (i == -1)
+                break;
+            ne = X509_NAME_get_entry(nm, i);
+            gntmp.d.rfc822Name = X509_NAME_ENTRY_get_data(ne);
+            if (gntmp.d.rfc822Name->type != V_ASN1_IA5STRING)
+                return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
+
+            r = nc_match(&gntmp, nc);
+
+            if (r != X509_V_OK)
+                return r;
+        }
+
+    }
+
+    for (i = 0; i < sk_GENERAL_NAME_num(x->altname); i++) {
+        GENERAL_NAME *gen = sk_GENERAL_NAME_value(x->altname, i);
+        r = nc_match(gen, nc);
+        if (r != X509_V_OK)
+            return r;
+    }
+
+    return X509_V_OK;
+
+}
+
+static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc)
+{
+    GENERAL_SUBTREE *sub;
+    int i, r, match = 0;
+
+    /*
+     * Permitted subtrees: if any subtrees exist of matching the type at
+     * least one subtree must match.
+     */
+
+    for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->permittedSubtrees); i++) {
+        sub = sk_GENERAL_SUBTREE_value(nc->permittedSubtrees, i);
+        if (gen->type != sub->base->type)
+            continue;
+        if (sub->minimum || sub->maximum)
+            return X509_V_ERR_SUBTREE_MINMAX;
+        /* If we already have a match don't bother trying any more */
+        if (match == 2)
+            continue;
+        if (match == 0)
+            match = 1;
+        r = nc_match_single(gen, sub->base);
+        if (r == X509_V_OK)
+            match = 2;
+        else if (r != X509_V_ERR_PERMITTED_VIOLATION)
+            return r;
+    }
+
+    if (match == 1)
+        return X509_V_ERR_PERMITTED_VIOLATION;
+
+    /* Excluded subtrees: must not match any of these */
+
+    for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->excludedSubtrees); i++) {
+        sub = sk_GENERAL_SUBTREE_value(nc->excludedSubtrees, i);
+        if (gen->type != sub->base->type)
+            continue;
+        if (sub->minimum || sub->maximum)
+            return X509_V_ERR_SUBTREE_MINMAX;
+
+        r = nc_match_single(gen, sub->base);
+        if (r == X509_V_OK)
+            return X509_V_ERR_EXCLUDED_VIOLATION;
+        else if (r != X509_V_ERR_PERMITTED_VIOLATION)
+            return r;
+
+    }
+
+    return X509_V_OK;
+
+}
+
+static int nc_match_single(GENERAL_NAME *gen, GENERAL_NAME *base)
+{
+    switch (base->type) {
+    case GEN_DIRNAME:
+        return nc_dn(gen->d.directoryName, base->d.directoryName);
+
+    case GEN_DNS:
+        return nc_dns(gen->d.dNSName, base->d.dNSName);
+
+    case GEN_EMAIL:
+        return nc_email(gen->d.rfc822Name, base->d.rfc822Name);
+
+    case GEN_URI:
+        return nc_uri(gen->d.uniformResourceIdentifier,
+                      base->d.uniformResourceIdentifier);
+
+    default:
+        return X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE;
+    }
+
+}
+
+/*
+ * directoryName name constraint matching. The canonical encoding of
+ * X509_NAME makes this comparison easy. It is matched if the subtree is a
+ * subset of the name.
+ */
+
+static int nc_dn(X509_NAME *nm, X509_NAME *base)
+{
+    /* Ensure canonical encodings are up to date.  */
+    if (nm->modified && i2d_X509_NAME(nm, NULL) < 0)
+        return X509_V_ERR_OUT_OF_MEM;
+    if (base->modified && i2d_X509_NAME(base, NULL) < 0)
+        return X509_V_ERR_OUT_OF_MEM;
+    if (base->canon_enclen > nm->canon_enclen)
+        return X509_V_ERR_PERMITTED_VIOLATION;
+    if (memcmp(base->canon_enc, nm->canon_enc, base->canon_enclen))
+        return X509_V_ERR_PERMITTED_VIOLATION;
+    return X509_V_OK;
+}
+
+static int nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base)
+{
+    char *baseptr = (char *)base->data;
+    char *dnsptr = (char *)dns->data;
+    /* Empty matches everything */
+    if (!*baseptr)
+        return X509_V_OK;
+    /*
+     * Otherwise can add zero or more components on the left so compare RHS
+     * and if dns is longer and expect '.' as preceding character.
+     */
+    if (dns->length > base->length) {
+        dnsptr += dns->length - base->length;
+        if (*baseptr != '.' && dnsptr[-1] != '.')
+            return X509_V_ERR_PERMITTED_VIOLATION;
+    }
+
+    if (strcasecmp(baseptr, dnsptr))
+        return X509_V_ERR_PERMITTED_VIOLATION;
+
+    return X509_V_OK;
+
+}
+
+static int nc_email(ASN1_IA5STRING *eml, ASN1_IA5STRING *base)
+{
+    const char *baseptr = (char *)base->data;
+    const char *emlptr = (char *)eml->data;
+
+    const char *baseat = strchr(baseptr, '@');
+    const char *emlat = strchr(emlptr, '@');
+    if (!emlat)
+        return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
+    /* Special case: inital '.' is RHS match */
+    if (!baseat && (*baseptr == '.')) {
+        if (eml->length > base->length) {
+            emlptr += eml->length - base->length;
+            if (!strcasecmp(baseptr, emlptr))
+                return X509_V_OK;
+        }
+        return X509_V_ERR_PERMITTED_VIOLATION;
+    }
+
+    /* If we have anything before '@' match local part */
+
+    if (baseat) {
+        if (baseat != baseptr) {
+            if ((baseat - baseptr) != (emlat - emlptr))
+                return X509_V_ERR_PERMITTED_VIOLATION;
+            /* Case sensitive match of local part */
+            if (strncmp(baseptr, emlptr, emlat - emlptr))
+                return X509_V_ERR_PERMITTED_VIOLATION;
+        }
+        /* Position base after '@' */
+        baseptr = baseat + 1;
+    }
+    emlptr = emlat + 1;
+    /* Just have hostname left to match: case insensitive */
+    if (strcasecmp(baseptr, emlptr))
+        return X509_V_ERR_PERMITTED_VIOLATION;
+
+    return X509_V_OK;
+
+}
+
+static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base)
+{
+    const char *baseptr = (char *)base->data;
+    const char *hostptr = (char *)uri->data;
+    const char *p = strchr(hostptr, ':');
+    int hostlen;
+    /* Check for foo:// and skip past it */
+    if (!p || (p[1] != '/') || (p[2] != '/'))
+        return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
+    hostptr = p + 3;
+
+    /* Determine length of hostname part of URI */
+
+    /* Look for a port indicator as end of hostname first */
+
+    p = strchr(hostptr, ':');
+    /* Otherwise look for trailing slash */
+    if (!p)
+        p = strchr(hostptr, '/');
+
+    if (!p)
+        hostlen = strlen(hostptr);
+    else
+        hostlen = p - hostptr;
+
+    if (hostlen == 0)
+        return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
+
+    /* Special case: inital '.' is RHS match */
+    if (*baseptr == '.') {
+        if (hostlen > base->length) {
+            p = hostptr + hostlen - base->length;
+            if (!strncasecmp(p, baseptr, base->length))
+                return X509_V_OK;
+        }
+        return X509_V_ERR_PERMITTED_VIOLATION;
+    }
+
+    if ((base->length != (int)hostlen)
+        || strncasecmp(hostptr, baseptr, hostlen))
+        return X509_V_ERR_PERMITTED_VIOLATION;
+
+    return X509_V_OK;
 
+}