/*
- * Copyright (c) 2010, JANET(UK)
+ * Copyright (c) 2011, JANET(UK)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
+/*
+ * Portions Copyright 2009 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ * require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission. Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is" without express
+ * or implied warranty.
+ */
+
+/*
+ * Name utility routines.
+ */
#include "gssapiP_eap.h"
+static gss_OID_desc gssEapNtEapName = {
+ /* 1.3.6.1.4.1.5322.22.2.1 */
+ 10, "\x2B\x06\x01\x04\x01\xA9\x4A\x16\x02\x01"
+};
+
+gss_OID GSS_EAP_NT_EAP_NAME = &gssEapNtEapName;
+
OM_uint32
gssEapAllocName(OM_uint32 *minor, gss_name_t *pName)
{
OM_uint32 tmpMinor;
gss_name_t name;
- assert(*pName == GSS_C_NO_NAME);
+ *pName = GSS_C_NO_NAME;
name = (gss_name_t)GSSEAP_CALLOC(1, sizeof(*name));
if (name == NULL) {
gssEapReleaseName(OM_uint32 *minor, gss_name_t *pName)
{
gss_name_t name;
- krb5_context kerbCtx = NULL;
+ krb5_context krbContext = NULL;
+ OM_uint32 tmpMinor;
+
+ *minor = 0;
if (pName == NULL) {
return GSS_S_COMPLETE;
return GSS_S_COMPLETE;
}
- krb5_init_context(&kerbCtx);
- krb5_free_principal(kerbCtx, name->krbPrincipal);
- if (kerbCtx != NULL) {
- krb5_free_context(kerbCtx);
- }
+ GSSEAP_KRB_INIT(&krbContext);
+ krb5_free_principal(krbContext, name->krbPrincipal);
+ gssEapReleaseOid(&tmpMinor, &name->mechanismUsed);
+
+ gssEapReleaseAttrContext(&tmpMinor, name);
GSSEAP_MUTEX_DESTROY(&name->mutex);
GSSEAP_FREE(name);
*pName = NULL;
+ return GSS_S_COMPLETE;
+}
+
+static OM_uint32
+krbPrincipalToName(OM_uint32 *minor,
+ krb5_principal *principal,
+ gss_name_t *pName)
+{
+ OM_uint32 major;
+ gss_name_t name;
+
+ major = gssEapAllocName(minor, &name);
+ if (GSS_ERROR(major))
+ return major;
+
+ name->krbPrincipal = *principal;
+ *principal = NULL;
+
+ if (KRB_PRINC_LENGTH(name->krbPrincipal) > 1) {
+ name->flags |= NAME_FLAG_SERVICE;
+ } else {
+ name->flags |= NAME_FLAG_NAI;
+ }
+
+ *pName = name;
*minor = 0;
+
return GSS_S_COMPLETE;
}
+static char *
+gssEapGetDefaultRealm(krb5_context krbContext)
+{
+ char *defaultRealm = NULL;
+
+ krb5_appdefault_string(krbContext, "eap_gss",
+ NULL, "default_realm", "", &defaultRealm);
+
+ return defaultRealm;
+}
+
+static OM_uint32
+importServiceName(OM_uint32 *minor,
+ const gss_buffer_t nameBuffer,
+ gss_name_t *pName)
+{
+ OM_uint32 major;
+ krb5_error_code code;
+ krb5_context krbContext;
+ krb5_principal krbPrinc;
+ char *service, *host, *realm = NULL;
+
+ GSSEAP_KRB_INIT(&krbContext);
+
+ major = bufferToString(minor, nameBuffer, &service);
+ if (GSS_ERROR(major))
+ return major;
+
+ host = strchr(service, '@');
+ if (host != NULL) {
+ *host = '\0';
+ host++;
+ }
+
+ realm = gssEapGetDefaultRealm(krbContext);
+
+ code = krb5_build_principal(krbContext,
+ &krbPrinc,
+ realm != NULL ? strlen(realm) : 0,
+ realm != NULL ? realm : "",
+ service,
+ host,
+ NULL);
+
+ if (code == 0) {
+ KRB_PRINC_TYPE(krbPrinc) = KRB5_NT_SRV_HST;
+
+ major = krbPrincipalToName(minor, &krbPrinc, pName);
+ if (GSS_ERROR(major))
+ krb5_free_principal(krbContext, krbPrinc);
+ } else {
+ major = GSS_S_FAILURE;
+ *minor = GSSEAP_BAD_SERVICE_NAME;
+ }
+
+ if (realm != NULL)
+ GSSEAP_FREE(realm);
+ GSSEAP_FREE(service);
+
+ return major;
+}
+
+#define IMPORT_FLAG_DEFAULT_REALM 0x1
+
+/*
+ * Import an EAP name, possibly appending the default GSS EAP realm,
+ */
+static OM_uint32
+importEapNameFlags(OM_uint32 *minor,
+ const gss_buffer_t nameBuffer,
+ OM_uint32 importFlags,
+ gss_name_t *pName)
+{
+ OM_uint32 major;
+ krb5_context krbContext;
+ krb5_principal krbPrinc = NULL;
+ krb5_error_code code;
+
+ GSSEAP_KRB_INIT(&krbContext);
+
+ if (nameBuffer == GSS_C_NO_BUFFER) {
+ code = krb5_copy_principal(krbContext,
+ krbAnonymousPrincipal(), &krbPrinc);
+ if (code != 0) {
+ *minor = code;
+ return GSS_S_FAILURE;
+ }
+ } else {
+ char *nameString;
+
+ major = bufferToString(minor, nameBuffer, &nameString);
+ if (GSS_ERROR(major))
+ return major;
+
+ /*
+ * First, attempt to parse the name on the assumption that it includes
+ * a qualifying realm. This allows us to avoid accidentally appending
+ * the default Kerberos realm to an unqualified name. (A bug in MIT
+ * Kerberos prevents the default realm being set to an empty value.)
+ */
+ code = krb5_parse_name_flags(krbContext, nameString,
+ KRB5_PRINCIPAL_PARSE_REQUIRE_REALM, &krbPrinc);
+ if (code == KRB5_PARSE_MALFORMED) {
+ char *defaultRealm = NULL;
+ int parseFlags = 0;
+
+ /* Possibly append the default EAP realm if required */
+ if (importFlags & IMPORT_FLAG_DEFAULT_REALM)
+ defaultRealm = gssEapGetDefaultRealm(krbContext);
+
+ /* If no default realm, leave the realm empty in the parsed name */
+ if (defaultRealm == NULL || defaultRealm[0] == '\0')
+ parseFlags |= KRB5_PRINCIPAL_PARSE_NO_REALM;
+
+ code = krb5_parse_name_flags(krbContext, nameString, parseFlags, &krbPrinc);
+
+#ifdef HAVE_HEIMDAL_VERSION
+ if (code == 0 && KRB_PRINC_REALM(krbPrinc) == NULL) {
+ KRB_PRINC_REALM(krbPrinc) = GSSEAP_CALLOC(1, sizeof(char));
+ if (KRB_PRINC_REALM(krbPrinc) == NULL)
+ code = ENOMEM;
+ }
+#endif
+
+ if (defaultRealm != NULL)
+ GSSEAP_FREE(defaultRealm);
+ }
+
+ GSSEAP_FREE(nameString);
+
+ if (code != 0) {
+ *minor = code;
+ return GSS_S_FAILURE;
+ }
+ }
+
+ assert(krbPrinc != NULL);
+
+ major = krbPrincipalToName(minor, &krbPrinc, pName);
+ if (GSS_ERROR(major))
+ krb5_free_principal(krbContext, krbPrinc);
+
+ return major;
+}
+
+static OM_uint32
+importEapName(OM_uint32 *minor,
+ const gss_buffer_t nameBuffer,
+ gss_name_t *pName)
+{
+ return importEapNameFlags(minor, nameBuffer, 0, pName);
+}
+
+static OM_uint32
+importUserName(OM_uint32 *minor,
+ const gss_buffer_t nameBuffer,
+ gss_name_t *pName)
+{
+ return importEapNameFlags(minor, nameBuffer, IMPORT_FLAG_DEFAULT_REALM, pName);
+}
+
+static OM_uint32
+importAnonymousName(OM_uint32 *minor,
+ const gss_buffer_t nameBuffer GSSEAP_UNUSED,
+ gss_name_t *pName)
+{
+ return importEapNameFlags(minor, GSS_C_NO_BUFFER, 0, pName);
+}
+
+#define UPDATE_REMAIN(n) do { \
+ p += (n); \
+ remain -= (n); \
+ } while (0)
+
+#define CHECK_REMAIN(n) do { \
+ if (remain < (n)) { \
+ major = GSS_S_BAD_NAME; \
+ *minor = GSSEAP_TOK_TRUNC; \
+ goto cleanup; \
+ } \
+ } while (0)
+
+OM_uint32
+gssEapImportNameInternal(OM_uint32 *minor,
+ const gss_buffer_t nameBuffer,
+ gss_name_t *pName,
+ unsigned int flags)
+{
+ OM_uint32 major, tmpMinor;
+ krb5_context krbContext;
+ unsigned char *p;
+ size_t len, remain;
+ gss_buffer_desc buf;
+ enum gss_eap_token_type tokType;
+ gss_name_t name = GSS_C_NO_NAME;
+ gss_OID mechanismUsed = GSS_C_NO_OID;
+
+ GSSEAP_KRB_INIT(&krbContext);
+
+ p = (unsigned char *)nameBuffer->value;
+ remain = nameBuffer->length;
+
+ if (flags & EXPORT_NAME_FLAG_OID) {
+ gss_OID_desc mech;
+
+ /* TOK_ID || MECH_OID_LEN || MECH_OID */
+ if (remain < 6)
+ return GSS_S_BAD_NAME;
+
+ if (flags & EXPORT_NAME_FLAG_COMPOSITE)
+ tokType = TOK_TYPE_EXPORT_NAME_COMPOSITE;
+ else
+ tokType = TOK_TYPE_EXPORT_NAME;
+
+ /* TOK_ID */
+ if (load_uint16_be(p) != tokType)
+ return GSS_S_BAD_NAME;
+ UPDATE_REMAIN(2);
+
+ /* MECH_OID_LEN */
+ len = load_uint16_be(p);
+ if (len < 2)
+ return GSS_S_BAD_NAME;
+ UPDATE_REMAIN(2);
+
+ /* MECH_OID */
+ if (p[0] != 0x06)
+ return GSS_S_BAD_NAME;
+
+ mech.length = p[1];
+ mech.elements = &p[2];
+
+ CHECK_REMAIN(mech.length);
+
+ major = gssEapCanonicalizeOid(minor,
+ &mech,
+ OID_FLAG_FAMILY_MECH_VALID |
+ OID_FLAG_MAP_FAMILY_MECH_TO_NULL,
+ &mechanismUsed);
+ if (GSS_ERROR(major))
+ goto cleanup;
+
+ UPDATE_REMAIN(2 + mech.length);
+ }
+
+ /* NAME_LEN */
+ CHECK_REMAIN(4);
+ len = load_uint32_be(p);
+ UPDATE_REMAIN(4);
+
+ /* NAME */
+ CHECK_REMAIN(len);
+ buf.length = len;
+ buf.value = p;
+ UPDATE_REMAIN(len);
+
+ major = importEapNameFlags(minor, &buf, 0, &name);
+ if (GSS_ERROR(major))
+ goto cleanup;
+
+ name->mechanismUsed = mechanismUsed;
+ mechanismUsed = GSS_C_NO_OID;
+
+ if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
+ gss_buffer_desc buf;
+
+ buf.length = remain;
+ buf.value = p;
+
+ major = gssEapImportAttrContext(minor, &buf, name);
+ if (GSS_ERROR(major))
+ goto cleanup;
+ }
+
+ major = GSS_S_COMPLETE;
+ *minor = 0;
+
+cleanup:
+ if (GSS_ERROR(major)) {
+ gssEapReleaseOid(&tmpMinor, &mechanismUsed);
+ gssEapReleaseName(&tmpMinor, &name);
+ } else {
+ *pName = name;
+ }
+
+ return major;
+}
+
+static OM_uint32
+importExportName(OM_uint32 *minor,
+ const gss_buffer_t nameBuffer,
+ gss_name_t *name)
+{
+ return gssEapImportNameInternal(minor, nameBuffer, name,
+ EXPORT_NAME_FLAG_OID);
+}
+
+#ifdef HAVE_GSS_C_NT_COMPOSITE_EXPORT
+static OM_uint32
+importCompositeExportName(OM_uint32 *minor,
+ const gss_buffer_t nameBuffer,
+ gss_name_t *name)
+{
+ return gssEapImportNameInternal(minor, nameBuffer, name,
+ EXPORT_NAME_FLAG_OID |
+ EXPORT_NAME_FLAG_COMPOSITE);
+}
+#endif
+
+struct gss_eap_name_import_provider {
+ gss_const_OID oid;
+ OM_uint32 (*import)(OM_uint32 *, const gss_buffer_t, gss_name_t *);
+};
+
+OM_uint32
+gssEapImportName(OM_uint32 *minor,
+ const gss_buffer_t nameBuffer,
+ const gss_OID nameType,
+ const gss_OID mechType,
+ gss_name_t *pName)
+{
+ struct gss_eap_name_import_provider nameTypes[] = {
+ { GSS_EAP_NT_EAP_NAME, importEapName },
+ { GSS_C_NT_USER_NAME, importUserName },
+ { GSS_C_NT_HOSTBASED_SERVICE, importServiceName },
+ { GSS_C_NT_HOSTBASED_SERVICE_X, importServiceName },
+ { GSS_C_NT_ANONYMOUS, importAnonymousName },
+ { GSS_C_NT_EXPORT_NAME, importExportName },
+ { GSS_KRB5_NT_PRINCIPAL_NAME, importUserName },
+#ifdef HAVE_GSS_C_NT_COMPOSITE_EXPORT
+ { GSS_C_NT_COMPOSITE_EXPORT, importCompositeExportName },
+#endif
+ };
+ size_t i;
+ OM_uint32 major = GSS_S_BAD_NAMETYPE;
+ OM_uint32 tmpMinor;
+ gss_name_t name = GSS_C_NO_NAME;
+
+ for (i = 0; i < sizeof(nameTypes) / sizeof(nameTypes[0]); i++) {
+ if (oidEqual(nameTypes[i].oid,
+ nameType == GSS_C_NO_OID ? GSS_EAP_NT_EAP_NAME : nameType)) {
+ major = nameTypes[i].import(minor, nameBuffer, &name);
+ break;
+ }
+ }
+
+ if (major == GSS_S_COMPLETE &&
+ mechType != GSS_C_NO_OID) {
+ assert(gssEapIsConcreteMechanismOid(mechType));
+ assert(name->mechanismUsed == GSS_C_NO_OID);
+
+ major = gssEapCanonicalizeOid(minor, mechType, 0, &name->mechanismUsed);
+ }
+
+ if (GSS_ERROR(major))
+ gssEapReleaseName(&tmpMinor, &name);
+ else
+ *pName = name;
+
+ return major;
+}
+
+OM_uint32
+gssEapExportName(OM_uint32 *minor,
+ const gss_name_t name,
+ gss_buffer_t exportedName)
+{
+ return gssEapExportNameInternal(minor, name, exportedName,
+ EXPORT_NAME_FLAG_OID);
+}
+
+OM_uint32
+gssEapExportNameInternal(OM_uint32 *minor,
+ const gss_name_t name,
+ gss_buffer_t exportedName,
+ unsigned int flags)
+{
+ OM_uint32 major = GSS_S_FAILURE, tmpMinor;
+ gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
+ size_t exportedNameLen;
+ unsigned char *p;
+ gss_buffer_desc attrs = GSS_C_EMPTY_BUFFER;
+ gss_OID mech;
+
+ exportedName->length = 0;
+ exportedName->value = NULL;
+
+ if (name->mechanismUsed != GSS_C_NO_OID)
+ mech = name->mechanismUsed;
+ else
+ mech = GSS_EAP_MECHANISM;
+
+ major = gssEapDisplayName(minor, name, &nameBuf, NULL);
+ if (GSS_ERROR(major))
+ goto cleanup;
+
+ exportedNameLen = 0;
+ if (flags & EXPORT_NAME_FLAG_OID) {
+ exportedNameLen += 6 + mech->length;
+ }
+ exportedNameLen += 4 + nameBuf.length;
+ if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
+ major = gssEapExportAttrContext(minor, name, &attrs);
+ if (GSS_ERROR(major))
+ goto cleanup;
+ exportedNameLen += attrs.length;
+ }
+
+ exportedName->value = GSSEAP_MALLOC(exportedNameLen);
+ if (exportedName->value == NULL) {
+ major = GSS_S_FAILURE;
+ *minor = ENOMEM;
+ goto cleanup;
+ }
+ exportedName->length = exportedNameLen;
+
+ p = (unsigned char *)exportedName->value;
+
+ if (flags & EXPORT_NAME_FLAG_OID) {
+ /* TOK | MECH_OID_LEN */
+ store_uint16_be((flags & EXPORT_NAME_FLAG_COMPOSITE)
+ ? TOK_TYPE_EXPORT_NAME_COMPOSITE
+ : TOK_TYPE_EXPORT_NAME,
+ p);
+ p += 2;
+ store_uint16_be(mech->length + 2, p);
+ p += 2;
+
+ /* MECH_OID */
+ *p++ = 0x06;
+ *p++ = mech->length & 0xff;
+ memcpy(p, mech->elements, mech->length);
+ p += mech->length;
+ }
+
+ /* NAME_LEN */
+ store_uint32_be(nameBuf.length, p);
+ p += 4;
+
+ /* NAME */
+ memcpy(p, nameBuf.value, nameBuf.length);
+ p += nameBuf.length;
+
+ if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
+ memcpy(p, attrs.value, attrs.length);
+ p += attrs.length;
+ }
+
+ assert(p == (unsigned char *)exportedName->value + exportedNameLen);
+
+ major = GSS_S_COMPLETE;
+ *minor = 0;
+
+cleanup:
+ gss_release_buffer(&tmpMinor, &attrs);
+ gss_release_buffer(&tmpMinor, &nameBuf);
+ if (GSS_ERROR(major))
+ gss_release_buffer(&tmpMinor, exportedName);
+
+ return major;
+}
+
+OM_uint32
+gssEapCanonicalizeName(OM_uint32 *minor,
+ const gss_name_t input_name,
+ const gss_OID mech_type,
+ gss_name_t *dest_name)
+{
+ OM_uint32 major, tmpMinor;
+ krb5_context krbContext;
+ gss_name_t name;
+ gss_OID mech_used;
+
+ if (input_name == GSS_C_NO_NAME) {
+ *minor = EINVAL;
+ return GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME;
+ }
+
+ GSSEAP_KRB_INIT(&krbContext);
+
+ major = gssEapAllocName(minor, &name);
+ if (GSS_ERROR(major)) {
+ return major;
+ }
+
+ if (mech_type != GSS_C_NO_OID)
+ mech_used = mech_type;
+ else
+ mech_used = input_name->mechanismUsed;
+
+ major = gssEapCanonicalizeOid(minor,
+ mech_used,
+ OID_FLAG_NULL_VALID,
+ &name->mechanismUsed);
+ if (GSS_ERROR(major))
+ goto cleanup;
+
+ name->flags = input_name->flags;
+
+ *minor = krb5_copy_principal(krbContext, input_name->krbPrincipal,
+ &name->krbPrincipal);
+ if (*minor != 0) {
+ major = GSS_S_FAILURE;
+ goto cleanup;
+ }
+
+ if (input_name->attrCtx != NULL) {
+ major = gssEapDuplicateAttrContext(minor, input_name, name);
+ if (GSS_ERROR(major))
+ goto cleanup;
+ }
+
+ *dest_name = name;
+
+cleanup:
+ if (GSS_ERROR(major)) {
+ gssEapReleaseName(&tmpMinor, &name);
+ }
+
+ return major;
+}
+
+OM_uint32
+gssEapDuplicateName(OM_uint32 *minor,
+ const gss_name_t input_name,
+ gss_name_t *dest_name)
+{
+ return gssEapCanonicalizeName(minor, input_name,
+ GSS_C_NO_OID, dest_name);
+}
+
+OM_uint32
+gssEapDisplayName(OM_uint32 *minor,
+ gss_name_t name,
+ gss_buffer_t output_name_buffer,
+ gss_OID *output_name_type)
+{
+ OM_uint32 major;
+ krb5_context krbContext;
+ char *krbName;
+ gss_OID name_type;
+ int flags = 0;
+
+ GSSEAP_KRB_INIT(&krbContext);
+
+ output_name_buffer->length = 0;
+ output_name_buffer->value = NULL;
+
+ if (name == GSS_C_NO_NAME) {
+ *minor = EINVAL;
+ return GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME;
+ }
+
+ /*
+ * According to draft-ietf-abfab-gss-eap-01, when the realm is
+ * absent the trailing '@' is not included.
+ */
+#ifdef HAVE_HEIMDAL_VERSION
+ if (KRB_PRINC_REALM(name->krbPrincipal) == NULL ||
+ KRB_PRINC_REALM(name->krbPrincipal)[0] == '\0')
+#else
+ if (KRB_PRINC_REALM(name->krbPrincipal)->length == 0)
+#endif
+ flags |= KRB5_PRINCIPAL_UNPARSE_NO_REALM;
+
+ *minor = krb5_unparse_name_flags(krbContext, name->krbPrincipal,
+ flags, &krbName);
+ if (*minor != 0) {
+ return GSS_S_FAILURE;
+ }
+
+ major = makeStringBuffer(minor, krbName, output_name_buffer);
+ if (GSS_ERROR(major)) {
+ krb5_free_unparsed_name(krbContext, krbName);
+ return major;
+ }
+
+ krb5_free_unparsed_name(krbContext, krbName);
+
+ if (KRB_PRINC_TYPE(name->krbPrincipal) == KRB5_NT_WELLKNOWN &&
+ krb5_principal_compare(krbContext,
+ name->krbPrincipal, krbAnonymousPrincipal())) {
+ name_type = GSS_C_NT_ANONYMOUS;
+ } else {
+ name_type = GSS_EAP_NT_EAP_NAME;
+ }
+
+ if (output_name_type != NULL)
+ *output_name_type = name_type;
+
+ return GSS_S_COMPLETE;
+}
+
+OM_uint32
+gssEapCompareName(OM_uint32 *minor,
+ gss_name_t name1,
+ gss_name_t name2,
+ int *name_equal)
+{
+ krb5_context krbContext;
+
+ *minor = 0;
+
+ if (name1 == GSS_C_NO_NAME && name2 == GSS_C_NO_NAME) {
+ *name_equal = 1;
+ } else if (name1 != GSS_C_NO_NAME && name2 != GSS_C_NO_NAME) {
+ GSSEAP_KRB_INIT(&krbContext);
+
+ /* krbPrincipal is immutable, so lock not required */
+ *name_equal = krb5_principal_compare(krbContext,
+ name1->krbPrincipal,
+ name2->krbPrincipal);
+ }
+
+ return GSS_S_COMPLETE;
+}
projects / mech_eap.orig / blobdiff