--- /dev/null
+/*
+ Copyright (c) 2004 The Regents of the University of Michigan.
+ 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 University 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 ``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 REGENTS 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 "config.h"
+#include <stdio.h>
+#include <syslog.h>
+#include <string.h>
+#include <gssapi/gssapi.h>
+#include <rpc/rpc.h>
+#include <rpc/auth_gss.h>
+#include "gss_util.h"
+#include "gss_oids.h"
+#include "err_util.h"
+#include "context.h"
+
+#ifdef HAVE_KRB5
+#include <krb5.h>
+
+/* XXX spkm3 seems to actually want it this big, yipes. */
+#define MAX_CTX_LEN 4096
+
+#ifdef HAVE_LUCID_CONTEXT_SUPPORT
+
+/* Don't use the private structure, use the exported lucid structure */
+#include <gssapi/gssapi_krb5.h>
+
+#elif (KRB5_VERSION > 131)
+/* XXX argggg, there's gotta be a better way than just duplicating this
+ * whole struct. Unfortunately, this is in a "private" header file,
+ * so this is our best choice at this point :-/
+ *
+ * XXX Does this match the Heimdal definition? */
+
+typedef struct _krb5_gss_ctx_id_rec {
+ unsigned int initiate : 1; /* nonzero if initiating, zero if accepting */
+ unsigned int established : 1;
+ unsigned int big_endian : 1;
+ unsigned int have_acceptor_subkey : 1;
+ unsigned int seed_init : 1; /* XXX tested but never actually set */
+#ifdef CFX_EXERCISE
+ unsigned int testing_unknown_tokid : 1; /* for testing only */
+#endif
+ OM_uint32 gss_flags;
+ unsigned char seed[16];
+ krb5_principal here;
+ krb5_principal there;
+ krb5_keyblock *subkey;
+ int signalg;
+ size_t cksum_size;
+ int sealalg;
+ krb5_keyblock *enc;
+ krb5_keyblock *seq;
+ krb5_timestamp endtime;
+ krb5_flags krb_flags;
+ /* XXX these used to be signed. the old spec is inspecific, and
+ the new spec specifies unsigned. I don't believe that the change
+ affects the wire encoding. */
+ uint64_t seq_send; /* gssint_uint64 */
+ uint64_t seq_recv; /* gssint_uint64 */
+ void *seqstate;
+ krb5_auth_context auth_context;
+ gss_buffer_desc *mech_used; /* gss_OID_desc */
+ /* Protocol spec revision
+ 0 => RFC 1964 with 3DES and RC4 enhancements
+ 1 => draft-ietf-krb-wg-gssapi-cfx-01
+ No others defined so far. */
+ int proto;
+ krb5_cksumtype cksumtype; /* for "main" subkey */
+ krb5_keyblock *acceptor_subkey; /* CFX only */
+ krb5_cksumtype acceptor_subkey_cksumtype;
+#ifdef CFX_EXERCISE
+ gss_buffer_desc init_token;
+#endif
+} krb5_gss_ctx_id_rec, *krb5_gss_ctx_id_t;
+
+#else /* KRB5_VERSION > 131 */
+
+typedef struct _krb5_gss_ctx_id_rec {
+ int initiate;
+ u_int32_t gss_flags;
+ int seed_init;
+ unsigned char seed[16];
+ krb5_principal here;
+ krb5_principal there;
+ krb5_keyblock *subkey;
+ int signalg;
+ int cksum_size;
+ int sealalg;
+ krb5_keyblock *enc;
+ krb5_keyblock *seq;
+ krb5_timestamp endtime;
+ krb5_flags krb_flags;
+ krb5_ui_4 seq_send;
+ krb5_ui_4 seq_recv;
+ void *seqstate;
+ int established;
+ int big_endian;
+ krb5_auth_context auth_context;
+ gss_buffer_desc *mech_used;
+ int nctypes;
+ krb5_cksumtype *ctypes;
+} krb5_gss_ctx_id_rec, *krb5_gss_ctx_id_t;
+
+#endif /* KRB5_VERSION */
+
+
+#ifdef HAVE_LUCID_CONTEXT_SUPPORT /* Lucid context support */
+static int
+write_lucid_keyblock(char **p, char *end, gss_krb5_lucid_key_t *key)
+{
+ gss_buffer_desc tmp;
+
+ if (WRITE_BYTES(p, end, key->type)) return -1;
+ tmp.length = key->length;
+ tmp.value = key->data;
+ if (write_buffer(p, end, &tmp)) return -1;
+ return 0;
+}
+
+static int
+prepare_krb5_rfc1964_buffer(gss_krb5_lucid_context_v1_t *lctx,
+ gss_buffer_desc *buf)
+{
+ char *p, *end;
+ static int constant_zero = 0;
+ unsigned char fakeseed[16];
+ uint32_t word_send_seq;
+ gss_krb5_lucid_key_t enc_key;
+ int i;
+ char *skd, *dkd;
+ gss_buffer_desc fakeoid;
+
+ /*
+ * The new Kerberos interface to get the gss context
+ * does not include the seed or seed_init fields
+ * because we never really use them. But for now,
+ * send down a fake buffer so we can use the same
+ * interface to the kernel.
+ */
+ memset(&enc_key, 0, sizeof(enc_key));
+ memset(&fakeoid, 0, sizeof(fakeoid));
+
+ if (!(buf->value = calloc(1, MAX_CTX_LEN)))
+ goto out_err;
+ p = buf->value;
+ end = buf->value + MAX_CTX_LEN;
+
+ if (WRITE_BYTES(&p, end, lctx->initiate)) goto out_err;
+
+ /* seed_init and seed not used by kernel anyway */
+ if (WRITE_BYTES(&p, end, constant_zero)) goto out_err;
+ if (write_bytes(&p, end, &fakeseed, 16)) goto out_err;
+
+ if (WRITE_BYTES(&p, end, lctx->rfc1964_kd.sign_alg)) goto out_err;
+ if (WRITE_BYTES(&p, end, lctx->rfc1964_kd.seal_alg)) goto out_err;
+ if (WRITE_BYTES(&p, end, lctx->endtime)) goto out_err;
+ word_send_seq = lctx->send_seq; /* XXX send_seq is 64-bit */
+ if (WRITE_BYTES(&p, end, word_send_seq)) goto out_err;
+ if (write_buffer(&p, end, (gss_buffer_desc*)&krb5oid)) goto out_err;
+
+ /* derive the encryption key and copy it into buffer */
+ enc_key.type = lctx->rfc1964_kd.ctx_key.type;
+ enc_key.length = lctx->rfc1964_kd.ctx_key.length;
+ if ((enc_key.data = calloc(1, enc_key.length)) == NULL)
+ goto out_err;
+ skd = (char *) lctx->rfc1964_kd.ctx_key.data;
+ dkd = (char *) enc_key.data;
+ for (i = 0; i < enc_key.length; i++)
+ dkd[i] = skd[i] ^ 0xf0;
+ if (write_lucid_keyblock(&p, end, &enc_key)) {
+ free(enc_key.data);
+ goto out_err;
+ }
+ free(enc_key.data);
+
+ if (write_lucid_keyblock(&p, end, &lctx->rfc1964_kd.ctx_key))
+ goto out_err;
+
+ buf->length = p - (char *)buf->value;
+ return 0;
+out_err:
+ printerr(0, "ERROR: failed serializing krb5 context for kernel\n");
+ if (buf->value) free(buf->value);
+ buf->length = 0;
+ if (enc_key.data) free(enc_key.data);
+ return -1;
+}
+
+static int
+prepare_krb5_rfc_cfx_buffer(gss_krb5_lucid_context_v1_t *lctx,
+ gss_buffer_desc *buf)
+{
+ printerr(0, "ERROR: prepare_krb5_rfc_cfx_buffer: not implemented\n");
+ return -1;
+}
+
+
+int
+serialize_krb5_ctx(gss_ctx_id_t ctx, gss_buffer_desc *buf)
+{
+ OM_uint32 maj_stat, min_stat;
+ void *return_ctx = 0;
+ OM_uint32 vers;
+ gss_krb5_lucid_context_v1_t *lctx = 0;
+ int retcode = 0;
+
+ printerr(2, "DEBUG: serialize_krb5_ctx: lucid version!\n");
+ maj_stat = gss_krb5_export_lucid_sec_context(&min_stat, &ctx,
+ 1, &return_ctx);
+ if (maj_stat != GSS_S_COMPLETE)
+ goto out_err;
+
+ /* Check the version returned, we only support v1 right now */
+ vers = ((gss_krb5_lucid_context_version_t *)return_ctx)->version;
+ switch (vers) {
+ case 1:
+ lctx = (gss_krb5_lucid_context_v1_t *) return_ctx;
+ break;
+ default:
+ printerr(0, "ERROR: unsupported lucid sec context version %d\n",
+ vers);
+ goto out_err;
+ break;
+ }
+
+ /* Now lctx points to a lucid context that we can send down to kernel */
+ if (lctx->protocol == 0)
+ retcode = prepare_krb5_rfc1964_buffer(lctx, buf);
+ else
+ retcode = prepare_krb5_rfc_cfx_buffer(lctx, buf);
+
+ maj_stat = gss_krb5_free_lucid_sec_context(&min_stat,
+ (void *)lctx);
+ if (maj_stat != GSS_S_COMPLETE)
+ printerr(0, "WARN: failed to free lucid sec context\n");
+ if (retcode)
+ goto out_err;
+
+ return 0;
+
+out_err:
+ printerr(0, "ERROR: failed serializing krb5 context for kernel\n");
+ return -1;
+}
+
+
+#else /* HAVE_LUCID_CONTEXT_SUPPORT */
+
+static int
+write_keyblock(char **p, char *end, struct _krb5_keyblock *arg)
+{
+ gss_buffer_desc tmp;
+
+ if (WRITE_BYTES(p, end, arg->enctype)) return -1;
+ tmp.length = arg->length;
+ tmp.value = arg->contents;
+ if (write_buffer(p, end, &tmp)) return -1;
+ return 0;
+}
+
+int
+serialize_krb5_ctx(gss_ctx_id_t ctx, gss_buffer_desc *buf)
+{
+ krb5_gss_ctx_id_t kctx = (krb5_gss_ctx_id_t)ctx;
+ char *p, *end;
+ static int constant_one = 1;
+ static int constant_zero = 0;
+ uint32_t word_seq_send;
+
+ if (!(buf->value = calloc(1, MAX_CTX_LEN)))
+ goto out_err;
+ p = buf->value;
+ end = buf->value + MAX_CTX_LEN;
+
+ if (kctx->initiate) {
+ if (WRITE_BYTES(&p, end, constant_one)) goto out_err;
+ }
+ else {
+ if (WRITE_BYTES(&p, end, constant_zero)) goto out_err;
+ }
+ if (kctx->seed_init) {
+ if (WRITE_BYTES(&p, end, constant_one)) goto out_err;
+ }
+ else {
+ if (WRITE_BYTES(&p, end, constant_zero)) goto out_err;
+ }
+ if (write_bytes(&p, end, &kctx->seed, sizeof(kctx->seed)))
+ goto out_err;
+ if (WRITE_BYTES(&p, end, kctx->signalg)) goto out_err;
+ if (WRITE_BYTES(&p, end, kctx->sealalg)) goto out_err;
+ if (WRITE_BYTES(&p, end, kctx->endtime)) goto out_err;
+ word_seq_send = kctx->seq_send;
+ if (WRITE_BYTES(&p, end, word_seq_send)) goto out_err;
+ if (write_buffer(&p, end, kctx->mech_used)) goto out_err;
+ if (write_keyblock(&p, end, kctx->enc)) goto out_err;
+ if (write_keyblock(&p, end, kctx->seq)) goto out_err;
+
+ buf->length = p - (char *)buf->value;
+ return 0;
+out_err:
+ printerr(0, "ERROR: failed serializing krb5 context for kernel\n");
+ if (buf->value) free(buf->value);
+ buf->length = 0;
+ return -1;
+}
+#endif /* HAVE_LUCID_CONTEXT_SUPPORT */
+
+#endif /* HAVE_KRB5 */
--- /dev/null
+/*
+ Copyright (c) 2004 The Regents of the University of Michigan.
+ 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 University 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 ``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 REGENTS 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 "config.h"
+#include <stdio.h>
+#include <syslog.h>
+#include <string.h>
+#include <gssapi/gssapi.h>
+#include <rpc/rpc.h>
+#include <rpc/auth_gss.h>
+#include "gss_util.h"
+#include "gss_oids.h"
+#include "err_util.h"
+#include "context.h"
+
+#ifdef HAVE_SPKM3_H
+
+#include <spkm3.h>
+
+/*
+ * Function: prepare_spkm3_ctx_buffer()
+ *
+ * Prepare spkm3 lucid context for the kernel
+ *
+ * buf->length should be:
+ *
+ * ctx_id 4 + 12
+ * qop 4
+ * mech_used 4 + 7
+ * ret_fl 4
+ * req_fl 4
+ * share 4 + key_len
+ * conf_alg 4 + oid_len
+ * d_conf_key 4 + key_len
+ * intg_alg 4 + oid_len
+ * d_intg_key 4 + key_len
+ * kyestb 4 + oid_len
+ * owl alg 4 + oid_len
+*/
+static int
+prepare_spkm3_ctx_buffer(gss_spkm3_lucid_ctx_t *lctx, gss_buffer_desc *buf)
+{
+ char *p, *end;
+ unsigned int buf_size = 0;
+
+ buf_size = lctx->ctx_id.length +
+ sizeof(lctx->ctx_id.length) + sizeof(lctx->qop) +
+ sizeof(lctx->mech_used.length) + lctx->mech_used.length +
+ sizeof(lctx->ret_flags) + sizeof(lctx->req_flags) +
+ sizeof(lctx->share_key.length) + lctx->share_key.length +
+ sizeof(lctx->conf_alg.length) + lctx->conf_alg.length +
+ sizeof(lctx->derived_conf_key.length) +
+ lctx->derived_conf_key.length +
+ sizeof(lctx->intg_alg.length) + lctx->intg_alg.length +
+ sizeof(lctx->derived_integ_key.length) +
+ lctx->derived_integ_key.length +
+ sizeof(lctx->keyestb_alg.length) + lctx->keyestb_alg.length +
+ sizeof(lctx->owf_alg.length) + lctx->owf_alg.length;
+
+ if (!(buf->value = calloc(1, buf_size)))
+ goto out_err;
+ p = buf->value;
+ end = buf->value + buf_size;
+
+ if (write_buffer(&p, end, &lctx->ctx_id))
+ goto out_err;
+
+ if (WRITE_BYTES(&p, end, lctx->qop))
+ goto out_err;
+
+ if (write_buffer(&p, end, &lctx->mech_used))
+ goto out_err;
+
+ if (WRITE_BYTES(&p, end, lctx->ret_flags))
+ goto out_err;
+
+ if (WRITE_BYTES(&p, end, lctx->req_flags))
+ goto out_err;
+
+ if (write_buffer(&p, end, &lctx->share_key))
+ goto out_err;
+
+ if (write_buffer(&p, end, &lctx->conf_alg))
+ goto out_err;
+
+ if (write_buffer(&p, end, &lctx->derived_conf_key))
+ goto out_err;
+
+ if (write_buffer(&p, end, &lctx->intg_alg))
+ goto out_err;
+
+ if (write_buffer(&p, end, &lctx->derived_integ_key))
+ goto out_err;
+
+ if (write_buffer(&p, end, &lctx->keyestb_alg))
+ goto out_err;
+
+ if (write_buffer(&p, end, &lctx->owf_alg))
+ goto out_err;
+
+ buf->length = p - (char *)buf->value;
+ return 0;
+out_err:
+ printerr(0, "ERROR: failed serializing spkm3 context for kernel\n");
+ if (buf->value) free(buf->value);
+ buf->length = 0;
+
+ return -1;
+}
+
+/* ANDROS: need to determine which fields of the spkm3_gss_ctx_id_desc_t
+ * are needed in the kernel for get_mic, validate, wrap, unwrap, and destroy
+ * and only export those fields to the kernel.
+ */
+int
+serialize_spkm3_ctx(gss_ctx_id_t ctx, gss_buffer_desc *buf)
+{
+ OM_uint32 vers, ret, maj_stat, min_stat;
+ void *ret_ctx = 0;
+ gss_spkm3_lucid_ctx_t *lctx;
+
+ printerr(1, "serialize_spkm3_ctx called\n");
+
+ printerr(2, "DEBUG: serialize_spkm3_ctx: lucid version!\n");
+ maj_stat = gss_export_lucid_sec_context(&min_stat, ctx, 1, &ret_ctx);
+ if (maj_stat != GSS_S_COMPLETE)
+ goto out_err;
+
+ lctx = (gss_spkm3_lucid_ctx_t *)ret_ctx;
+
+ vers = lctx->version;
+ if (vers != 1) {
+ printerr(0, "ERROR: unsupported spkm3 context version %d\n",
+ vers);
+ goto out_err;
+ }
+ ret = prepare_spkm3_ctx_buffer(lctx, buf);
+
+ maj_stat = gss_free_lucid_sec_context(&min_stat, ctx, ret_ctx);
+
+ if (maj_stat != GSS_S_COMPLETE)
+ printerr(0, "WARN: failed to free lucid sec context\n");
+ if (ret)
+ goto out_err;
+ printerr(2, "DEBUG: serialize_spkm3_ctx: success\n");
+ return 0;
+
+out_err:
+ printerr(2, "DEBUG: serialize_spkm3_ctx: failed\n");
+ return -1;
+}
+#endif /* HAVE_SPKM3_H */
projects / nfs-utils.git / commitdiff