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-rw-r--r--crypto/heimdal/lib/gssapi/mech/gss_mo.c635
1 files changed, 635 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/gssapi/mech/gss_mo.c b/crypto/heimdal/lib/gssapi/mech/gss_mo.c
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+/*
+ * Copyright (c) 2010 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Portions Copyright (c) 2010 Apple Inc. All rights reserved.
+ * Portions Copyright (c) 2010 PADL Software Pty Ltd. 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. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS 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 INSTITUTE OR 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.
+ */
+
+#include "mech_locl.h"
+
+#include <crypto-headers.h>
+
+static int
+get_option_def(int def, gss_const_OID mech, gss_mo_desc *mo, gss_buffer_t value)
+{
+ return def;
+}
+
+int
+_gss_mo_get_option_1(gss_const_OID mech, gss_mo_desc *mo, gss_buffer_t value)
+{
+ return get_option_def(1, mech, mo, value);
+}
+
+int
+_gss_mo_get_option_0(gss_const_OID mech, gss_mo_desc *mo, gss_buffer_t value)
+{
+ return get_option_def(0, mech, mo, value);
+}
+
+int
+_gss_mo_get_ctx_as_string(gss_const_OID mech, gss_mo_desc *mo, gss_buffer_t value)
+{
+ if (value) {
+ value->value = strdup((char *)mo->ctx);
+ if (value->value == NULL)
+ return GSS_S_FAILURE;
+ value->length = strlen((char *)mo->ctx);
+ }
+ return GSS_S_COMPLETE;
+}
+
+GSSAPI_LIB_FUNCTION int GSSAPI_LIB_CALL
+gss_mo_set(gss_const_OID mech, gss_const_OID option,
+ int enable, gss_buffer_t value)
+{
+ gssapi_mech_interface m;
+ size_t n;
+
+ if ((m = __gss_get_mechanism(mech)) == NULL)
+ return GSS_S_BAD_MECH;
+
+ for (n = 0; n < m->gm_mo_num; n++)
+ if (gss_oid_equal(option, m->gm_mo[n].option) && m->gm_mo[n].set)
+ return m->gm_mo[n].set(mech, &m->gm_mo[n], enable, value);
+
+ return GSS_S_UNAVAILABLE;
+}
+
+GSSAPI_LIB_FUNCTION int GSSAPI_LIB_CALL
+gss_mo_get(gss_const_OID mech, gss_const_OID option, gss_buffer_t value)
+{
+ gssapi_mech_interface m;
+ size_t n;
+
+ _mg_buffer_zero(value);
+
+ if ((m = __gss_get_mechanism(mech)) == NULL)
+ return GSS_S_BAD_MECH;
+
+ for (n = 0; n < m->gm_mo_num; n++)
+ if (gss_oid_equal(option, m->gm_mo[n].option) && m->gm_mo[n].get)
+ return m->gm_mo[n].get(mech, &m->gm_mo[n], value);
+
+ return GSS_S_UNAVAILABLE;
+}
+
+static void
+add_all_mo(gssapi_mech_interface m, gss_OID_set *options, OM_uint32 mask)
+{
+ OM_uint32 minor;
+ size_t n;
+
+ for (n = 0; n < m->gm_mo_num; n++)
+ if ((m->gm_mo[n].flags & mask) == mask)
+ gss_add_oid_set_member(&minor, m->gm_mo[n].option, options);
+}
+
+GSSAPI_LIB_FUNCTION void GSSAPI_LIB_CALL
+gss_mo_list(gss_const_OID mech, gss_OID_set *options)
+{
+ gssapi_mech_interface m;
+ OM_uint32 major, minor;
+
+ if (options == NULL)
+ return;
+
+ *options = GSS_C_NO_OID_SET;
+
+ if ((m = __gss_get_mechanism(mech)) == NULL)
+ return;
+
+ major = gss_create_empty_oid_set(&minor, options);
+ if (major != GSS_S_COMPLETE)
+ return;
+
+ add_all_mo(m, options, 0);
+}
+
+GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
+gss_mo_name(gss_const_OID mech, gss_const_OID option, gss_buffer_t name)
+{
+ gssapi_mech_interface m;
+ size_t n;
+
+ if (name == NULL)
+ return GSS_S_BAD_NAME;
+
+ if ((m = __gss_get_mechanism(mech)) == NULL)
+ return GSS_S_BAD_MECH;
+
+ for (n = 0; n < m->gm_mo_num; n++) {
+ if (gss_oid_equal(option, m->gm_mo[n].option)) {
+ /*
+ * If there is no name, its because its a GSS_C_MA and
+ * there is already a table for that.
+ */
+ if (m->gm_mo[n].name) {
+ name->value = strdup(m->gm_mo[n].name);
+ if (name->value == NULL)
+ return GSS_S_BAD_NAME;
+ name->length = strlen(m->gm_mo[n].name);
+ return GSS_S_COMPLETE;
+ } else {
+ OM_uint32 junk;
+ return gss_display_mech_attr(&junk, option,
+ NULL, name, NULL);
+ }
+ }
+ }
+ return GSS_S_BAD_NAME;
+}
+
+/*
+ * Helper function to allow NULL name
+ */
+
+static OM_uint32
+mo_value(const gss_const_OID mech, gss_const_OID option, gss_buffer_t name)
+{
+ if (name == NULL)
+ return GSS_S_COMPLETE;
+
+ return gss_mo_get(mech, option, name);
+}
+
+/* code derived from draft-ietf-cat-sasl-gssapi-01 */
+static char basis_32[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
+
+static OM_uint32
+make_sasl_name(OM_uint32 *minor, const gss_OID mech, char sasl_name[16])
+{
+ EVP_MD_CTX *ctx;
+ char *p = sasl_name;
+ u_char hdr[2], hash[20], *h = hash;
+
+ if (mech->length > 127)
+ return GSS_S_BAD_MECH;
+
+ hdr[0] = 0x06;
+ hdr[1] = mech->length;
+
+ ctx = EVP_MD_CTX_create();
+ EVP_DigestInit_ex(ctx, EVP_sha1(), NULL);
+ EVP_DigestUpdate(ctx, hdr, 2);
+ EVP_DigestUpdate(ctx, mech->elements, mech->length);
+ EVP_DigestFinal_ex(ctx, hash, NULL);
+
+ memcpy(p, "GS2-", 4);
+ p += 4;
+
+ *p++ = basis_32[(h[0] >> 3)];
+ *p++ = basis_32[((h[0] & 7) << 2) | (h[1] >> 6)];
+ *p++ = basis_32[(h[1] & 0x3f) >> 1];
+ *p++ = basis_32[((h[1] & 1) << 4) | (h[2] >> 4)];
+ *p++ = basis_32[((h[2] & 0xf) << 1) | (h[3] >> 7)];
+ *p++ = basis_32[(h[3] & 0x7f) >> 2];
+ *p++ = basis_32[((h[3] & 3) << 3) | (h[4] >> 5)];
+ *p++ = basis_32[(h[4] & 0x1f)];
+ *p++ = basis_32[(h[5] >> 3)];
+ *p++ = basis_32[((h[5] & 7) << 2) | (h[6] >> 6)];
+ *p++ = basis_32[(h[6] & 0x3f) >> 1];
+
+ *p = '\0';
+
+ return GSS_S_COMPLETE;
+}
+
+/*
+ * gss_inquire_saslname_for_mech() wrapper that uses MIT SPI
+ */
+static OM_uint32
+inquire_saslname_for_mech_compat(OM_uint32 *minor,
+ const gss_OID desired_mech,
+ gss_buffer_t sasl_mech_name,
+ gss_buffer_t mech_name,
+ gss_buffer_t mech_description)
+{
+ struct gss_mech_compat_desc_struct *gmc;
+ gssapi_mech_interface m;
+ OM_uint32 major;
+
+ m = __gss_get_mechanism(desired_mech);
+ if (m == NULL)
+ return GSS_S_BAD_MECH;
+
+ gmc = m->gm_compat;
+
+ if (gmc != NULL && gmc->gmc_inquire_saslname_for_mech != NULL) {
+ major = gmc->gmc_inquire_saslname_for_mech(minor,
+ desired_mech,
+ sasl_mech_name,
+ mech_name,
+ mech_description);
+ } else {
+ major = GSS_S_UNAVAILABLE;
+ }
+
+ return major;
+}
+
+/**
+ * Returns different protocol names and description of the mechanism.
+ *
+ * @param minor_status minor status code
+ * @param desired_mech mech list query
+ * @param sasl_mech_name SASL GS2 protocol name
+ * @param mech_name gssapi protocol name
+ * @param mech_description description of gssapi mech
+ *
+ * @return returns GSS_S_COMPLETE or a error code.
+ *
+ * @ingroup gssapi
+ */
+
+GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
+gss_inquire_saslname_for_mech(OM_uint32 *minor_status,
+ const gss_OID desired_mech,
+ gss_buffer_t sasl_mech_name,
+ gss_buffer_t mech_name,
+ gss_buffer_t mech_description)
+{
+ OM_uint32 major;
+
+ _mg_buffer_zero(sasl_mech_name);
+ _mg_buffer_zero(mech_name);
+ _mg_buffer_zero(mech_description);
+
+ if (minor_status)
+ *minor_status = 0;
+
+ if (desired_mech == NULL)
+ return GSS_S_BAD_MECH;
+
+ major = mo_value(desired_mech, GSS_C_MA_SASL_MECH_NAME, sasl_mech_name);
+ if (major == GSS_S_COMPLETE) {
+ /* Native SPI */
+ major = mo_value(desired_mech, GSS_C_MA_MECH_NAME, mech_name);
+ if (GSS_ERROR(major))
+ return major;
+
+ major = mo_value(desired_mech, GSS_C_MA_MECH_DESCRIPTION, mech_description);
+ if (GSS_ERROR(major))
+ return major;
+ }
+
+ if (GSS_ERROR(major)) {
+ /* API-as-SPI compatibility */
+ major = inquire_saslname_for_mech_compat(minor_status,
+ desired_mech,
+ sasl_mech_name,
+ mech_name,
+ mech_description);
+ }
+
+ if (GSS_ERROR(major)) {
+ /* Algorithmically dervied SASL mechanism name */
+ char buf[16];
+ gss_buffer_desc tmp = { sizeof(buf) - 1, buf };
+
+ major = make_sasl_name(minor_status, desired_mech, buf);
+ if (GSS_ERROR(major))
+ return major;
+
+ major = _gss_copy_buffer(minor_status, &tmp, sasl_mech_name);
+ if (GSS_ERROR(major))
+ return major;
+ }
+
+ return major;
+}
+
+/**
+ * Find a mech for a sasl name
+ *
+ * @param minor_status minor status code
+ * @param sasl_mech_name
+ * @param mech_type
+ *
+ * @return returns GSS_S_COMPLETE or an error code.
+ */
+
+GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
+gss_inquire_mech_for_saslname(OM_uint32 *minor_status,
+ const gss_buffer_t sasl_mech_name,
+ gss_OID *mech_type)
+{
+ struct _gss_mech_switch *m;
+ gss_buffer_desc name;
+ OM_uint32 major, junk;
+ char buf[16];
+
+ _gss_load_mech();
+
+ *mech_type = NULL;
+
+ HEIM_SLIST_FOREACH(m, &_gss_mechs, gm_link) {
+ struct gss_mech_compat_desc_struct *gmc;
+
+ /* Native SPI */
+ major = mo_value(&m->gm_mech_oid, GSS_C_MA_SASL_MECH_NAME, &name);
+ if (major == GSS_S_COMPLETE &&
+ name.length == sasl_mech_name->length &&
+ memcmp(name.value, sasl_mech_name->value, name.length) == 0) {
+ gss_release_buffer(&junk, &name);
+ *mech_type = &m->gm_mech_oid;
+ return GSS_S_COMPLETE;
+ }
+ gss_release_buffer(&junk, &name);
+
+ if (GSS_ERROR(major)) {
+ /* API-as-SPI compatibility */
+ gmc = m->gm_mech.gm_compat;
+ if (gmc && gmc->gmc_inquire_mech_for_saslname) {
+ major = gmc->gmc_inquire_mech_for_saslname(minor_status,
+ sasl_mech_name,
+ mech_type);
+ if (major == GSS_S_COMPLETE)
+ return GSS_S_COMPLETE;
+ }
+ }
+
+ if (GSS_ERROR(major)) {
+ /* Algorithmically dervied SASL mechanism name */
+ if (sasl_mech_name->length == 16 &&
+ make_sasl_name(minor_status, &m->gm_mech_oid, buf) == GSS_S_COMPLETE &&
+ memcmp(buf, sasl_mech_name->value, 16) == 0) {
+ *mech_type = &m->gm_mech_oid;
+ return GSS_S_COMPLETE;
+ }
+ }
+ }
+
+ return GSS_S_BAD_MECH;
+}
+
+/*
+ * Test mechanism against indicated attributes using both Heimdal and
+ * MIT SPIs.
+ */
+static int
+test_mech_attrs(gssapi_mech_interface mi,
+ gss_const_OID_set mech_attrs,
+ gss_const_OID_set against_attrs,
+ int except)
+{
+ size_t n, m;
+ int eq = 0;
+
+ if (against_attrs == GSS_C_NO_OID_SET)
+ return 1;
+
+ for (n = 0; n < against_attrs->count; n++) {
+ for (m = 0; m < mi->gm_mo_num; m++) {
+ eq = gss_oid_equal(mi->gm_mo[m].option,
+ &against_attrs->elements[n]);
+ if (eq)
+ break;
+ }
+ if (mech_attrs != GSS_C_NO_OID_SET) {
+ for (m = 0; m < mech_attrs->count; m++) {
+ eq = gss_oid_equal(&mech_attrs->elements[m],
+ &against_attrs->elements[n]);
+ if (eq)
+ break;
+ }
+ }
+ if (!eq ^ except)
+ return 0;
+ }
+
+ return 1;
+}
+
+/**
+ * Return set of mechanism that fullfill the criteria
+ *
+ * @param minor_status minor status code
+ * @param desired_mech_attrs
+ * @param except_mech_attrs
+ * @param critical_mech_attrs
+ * @param mechs returned mechs, free with gss_release_oid_set().
+ *
+ * @return returns GSS_S_COMPLETE or an error code.
+ */
+
+GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
+gss_indicate_mechs_by_attrs(OM_uint32 * minor_status,
+ gss_const_OID_set desired_mech_attrs,
+ gss_const_OID_set except_mech_attrs,
+ gss_const_OID_set critical_mech_attrs,
+ gss_OID_set *mechs)
+{
+ struct _gss_mech_switch *ms;
+ gss_OID_set mech_attrs = GSS_C_NO_OID_SET;
+ gss_OID_set known_mech_attrs = GSS_C_NO_OID_SET;
+ OM_uint32 major;
+
+ major = gss_create_empty_oid_set(minor_status, mechs);
+ if (GSS_ERROR(major))
+ return major;
+
+ _gss_load_mech();
+
+ HEIM_SLIST_FOREACH(ms, &_gss_mechs, gm_link) {
+ gssapi_mech_interface mi = &ms->gm_mech;
+ struct gss_mech_compat_desc_struct *gmc = mi->gm_compat;
+ OM_uint32 tmp;
+
+ if (gmc && gmc->gmc_inquire_attrs_for_mech) {
+ major = gmc->gmc_inquire_attrs_for_mech(minor_status,
+ &mi->gm_mech_oid,
+ &mech_attrs,
+ &known_mech_attrs);
+ if (GSS_ERROR(major))
+ continue;
+ }
+
+ /*
+ * Test mechanism supports all of desired_mech_attrs;
+ * none of except_mech_attrs;
+ * and knows of all critical_mech_attrs.
+ */
+ if (test_mech_attrs(mi, mech_attrs, desired_mech_attrs, 0) &&
+ test_mech_attrs(mi, mech_attrs, except_mech_attrs, 1) &&
+ test_mech_attrs(mi, known_mech_attrs, critical_mech_attrs, 0)) {
+ major = gss_add_oid_set_member(minor_status, &mi->gm_mech_oid, mechs);
+ }
+
+ gss_release_oid_set(&tmp, &mech_attrs);
+ gss_release_oid_set(&tmp, &known_mech_attrs);
+
+ if (GSS_ERROR(major))
+ break;
+ }
+
+ return major;
+}
+
+/**
+ * List support attributes for a mech and/or all mechanisms.
+ *
+ * @param minor_status minor status code
+ * @param mech given together with mech_attr will return the list of
+ * attributes for mechanism, can optionally be GSS_C_NO_OID.
+ * @param mech_attr see mech parameter, can optionally be NULL,
+ * release with gss_release_oid_set().
+ * @param known_mech_attrs all attributes for mechanisms supported,
+ * release with gss_release_oid_set().
+ *
+ * @ingroup gssapi
+ */
+
+GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
+gss_inquire_attrs_for_mech(OM_uint32 * minor_status,
+ gss_const_OID mech,
+ gss_OID_set *mech_attr,
+ gss_OID_set *known_mech_attrs)
+{
+ OM_uint32 major, junk;
+
+ if (known_mech_attrs)
+ *known_mech_attrs = GSS_C_NO_OID_SET;
+
+ if (mech_attr && mech) {
+ gssapi_mech_interface m;
+ struct gss_mech_compat_desc_struct *gmc;
+
+ if ((m = __gss_get_mechanism(mech)) == NULL) {
+ *minor_status = 0;
+ return GSS_S_BAD_MECH;
+ }
+
+ gmc = m->gm_compat;
+
+ if (gmc && gmc->gmc_inquire_attrs_for_mech) {
+ major = gmc->gmc_inquire_attrs_for_mech(minor_status,
+ mech,
+ mech_attr,
+ known_mech_attrs);
+ } else {
+ major = gss_create_empty_oid_set(minor_status, mech_attr);
+ if (major == GSS_S_COMPLETE)
+ add_all_mo(m, mech_attr, GSS_MO_MA);
+ }
+ if (GSS_ERROR(major))
+ return major;
+ }
+
+ if (known_mech_attrs) {
+ struct _gss_mech_switch *m;
+
+ if (*known_mech_attrs == GSS_C_NO_OID_SET) {
+ major = gss_create_empty_oid_set(minor_status, known_mech_attrs);
+ if (GSS_ERROR(major)) {
+ if (mech_attr)
+ gss_release_oid_set(&junk, mech_attr);
+ return major;
+ }
+ }
+
+ _gss_load_mech();
+
+ HEIM_SLIST_FOREACH(m, &_gss_mechs, gm_link)
+ add_all_mo(&m->gm_mech, known_mech_attrs, GSS_MO_MA);
+ }
+
+
+ return GSS_S_COMPLETE;
+}
+
+/**
+ * Return names and descriptions of mech attributes
+ *
+ * @param minor_status minor status code
+ * @param mech_attr
+ * @param name
+ * @param short_desc
+ * @param long_desc
+ *
+ * @return returns GSS_S_COMPLETE or an error code.
+ */
+
+GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
+gss_display_mech_attr(OM_uint32 * minor_status,
+ gss_const_OID mech_attr,
+ gss_buffer_t name,
+ gss_buffer_t short_desc,
+ gss_buffer_t long_desc)
+{
+ struct _gss_oid_name_table *ma = NULL;
+ OM_uint32 major;
+ size_t n;
+
+ _mg_buffer_zero(name);
+ _mg_buffer_zero(short_desc);
+ _mg_buffer_zero(long_desc);
+
+ if (minor_status)
+ *minor_status = 0;
+
+ for (n = 0; ma == NULL && _gss_ont_ma[n].oid; n++)
+ if (gss_oid_equal(mech_attr, _gss_ont_ma[n].oid))
+ ma = &_gss_ont_ma[n];
+
+ if (ma == NULL)
+ return GSS_S_BAD_MECH_ATTR;
+
+ if (name) {
+ gss_buffer_desc bd;
+ bd.value = rk_UNCONST(ma->name);
+ bd.length = strlen(ma->name);
+ major = _gss_copy_buffer(minor_status, &bd, name);
+ if (major != GSS_S_COMPLETE)
+ return major;
+ }
+
+ if (short_desc) {
+ gss_buffer_desc bd;
+ bd.value = rk_UNCONST(ma->short_desc);
+ bd.length = strlen(ma->short_desc);
+ major = _gss_copy_buffer(minor_status, &bd, short_desc);
+ if (major != GSS_S_COMPLETE)
+ return major;
+ }
+
+ if (long_desc) {
+ gss_buffer_desc bd;
+ bd.value = rk_UNCONST(ma->long_desc);
+ bd.length = strlen(ma->long_desc);
+ major = _gss_copy_buffer(minor_status, &bd, long_desc);
+ if (major != GSS_S_COMPLETE)
+ return major;
+ }
+
+ return GSS_S_COMPLETE;
+}
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