diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/ptlrpc/gss/gss_mech_switch.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/ptlrpc/gss/gss_mech_switch.c | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/ptlrpc/gss/gss_mech_switch.c b/drivers/staging/lustre/lustre/ptlrpc/gss/gss_mech_switch.c new file mode 100644 index 000000000000..8cdad800382d --- /dev/null +++ b/drivers/staging/lustre/lustre/ptlrpc/gss/gss_mech_switch.c @@ -0,0 +1,359 @@ +/* + * Modifications for Lustre + * + * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. + * + * Copyright (c) 2012, Intel Corporation. + * + * Author: Eric Mei <ericm@clusterfs.com> + */ + +/* + * linux/net/sunrpc/gss_mech_switch.c + * + * Copyright (c) 2001 The Regents of the University of Michigan. + * All rights reserved. + * + * J. Bruce Fields <bfields@umich.edu> + * + * 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. + * + */ + +#define DEBUG_SUBSYSTEM S_SEC +#include <linux/init.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/mutex.h> + +#include <obd.h> +#include <obd_class.h> +#include <obd_support.h> +#include <lustre/lustre_idl.h> +#include <lustre_net.h> +#include <lustre_import.h> +#include <lustre_sec.h> + +#include "gss_err.h" +#include "gss_internal.h" +#include "gss_api.h" + +static LIST_HEAD(registered_mechs); +static DEFINE_SPINLOCK(registered_mechs_lock); + +int lgss_mech_register(struct gss_api_mech *gm) +{ + spin_lock(®istered_mechs_lock); + list_add(&gm->gm_list, ®istered_mechs); + spin_unlock(®istered_mechs_lock); + CWARN("Register %s mechanism\n", gm->gm_name); + return 0; +} + +void lgss_mech_unregister(struct gss_api_mech *gm) +{ + spin_lock(®istered_mechs_lock); + list_del(&gm->gm_list); + spin_unlock(®istered_mechs_lock); + CWARN("Unregister %s mechanism\n", gm->gm_name); +} + + +struct gss_api_mech *lgss_mech_get(struct gss_api_mech *gm) +{ + __module_get(gm->gm_owner); + return gm; +} + +struct gss_api_mech *lgss_name_to_mech(char *name) +{ + struct gss_api_mech *pos, *gm = NULL; + + spin_lock(®istered_mechs_lock); + list_for_each_entry(pos, ®istered_mechs, gm_list) { + if (0 == strcmp(name, pos->gm_name)) { + if (!try_module_get(pos->gm_owner)) + continue; + gm = pos; + break; + } + } + spin_unlock(®istered_mechs_lock); + return gm; + +} + +static inline +int mech_supports_subflavor(struct gss_api_mech *gm, __u32 subflavor) +{ + int i; + + for (i = 0; i < gm->gm_sf_num; i++) { + if (gm->gm_sfs[i].sf_subflavor == subflavor) + return 1; + } + return 0; +} + +struct gss_api_mech *lgss_subflavor_to_mech(__u32 subflavor) +{ + struct gss_api_mech *pos, *gm = NULL; + + spin_lock(®istered_mechs_lock); + list_for_each_entry(pos, ®istered_mechs, gm_list) { + if (!try_module_get(pos->gm_owner)) + continue; + if (!mech_supports_subflavor(pos, subflavor)) { + module_put(pos->gm_owner); + continue; + } + gm = pos; + break; + } + spin_unlock(®istered_mechs_lock); + return gm; +} + +void lgss_mech_put(struct gss_api_mech *gm) +{ + module_put(gm->gm_owner); +} + +/* The mech could probably be determined from the token instead, but it's just + * as easy for now to pass it in. */ +__u32 lgss_import_sec_context(rawobj_t *input_token, + struct gss_api_mech *mech, + struct gss_ctx **ctx_id) +{ + OBD_ALLOC_PTR(*ctx_id); + if (*ctx_id == NULL) + return GSS_S_FAILURE; + + (*ctx_id)->mech_type = lgss_mech_get(mech); + + LASSERT(mech); + LASSERT(mech->gm_ops); + LASSERT(mech->gm_ops->gss_import_sec_context); + return mech->gm_ops->gss_import_sec_context(input_token, *ctx_id); +} + +__u32 lgss_copy_reverse_context(struct gss_ctx *ctx_id, + struct gss_ctx **ctx_id_new) +{ + struct gss_api_mech *mech = ctx_id->mech_type; + __u32 major; + + LASSERT(mech); + + OBD_ALLOC_PTR(*ctx_id_new); + if (*ctx_id_new == NULL) + return GSS_S_FAILURE; + + (*ctx_id_new)->mech_type = lgss_mech_get(mech); + + LASSERT(mech); + LASSERT(mech->gm_ops); + LASSERT(mech->gm_ops->gss_copy_reverse_context); + + major = mech->gm_ops->gss_copy_reverse_context(ctx_id, *ctx_id_new); + if (major != GSS_S_COMPLETE) { + lgss_mech_put(mech); + OBD_FREE_PTR(*ctx_id_new); + *ctx_id_new = NULL; + } + return major; +} + +/* + * this interface is much simplified, currently we only need endtime. + */ +__u32 lgss_inquire_context(struct gss_ctx *context_handle, + unsigned long *endtime) +{ + LASSERT(context_handle); + LASSERT(context_handle->mech_type); + LASSERT(context_handle->mech_type->gm_ops); + LASSERT(context_handle->mech_type->gm_ops->gss_inquire_context); + + return context_handle->mech_type->gm_ops + ->gss_inquire_context(context_handle, + endtime); +} + +/* gss_get_mic: compute a mic over message and return mic_token. */ +__u32 lgss_get_mic(struct gss_ctx *context_handle, + int msgcnt, + rawobj_t *msg, + int iovcnt, + lnet_kiov_t *iovs, + rawobj_t *mic_token) +{ + LASSERT(context_handle); + LASSERT(context_handle->mech_type); + LASSERT(context_handle->mech_type->gm_ops); + LASSERT(context_handle->mech_type->gm_ops->gss_get_mic); + + return context_handle->mech_type->gm_ops + ->gss_get_mic(context_handle, + msgcnt, + msg, + iovcnt, + iovs, + mic_token); +} + +/* gss_verify_mic: check whether the provided mic_token verifies message. */ +__u32 lgss_verify_mic(struct gss_ctx *context_handle, + int msgcnt, + rawobj_t *msg, + int iovcnt, + lnet_kiov_t *iovs, + rawobj_t *mic_token) +{ + LASSERT(context_handle); + LASSERT(context_handle->mech_type); + LASSERT(context_handle->mech_type->gm_ops); + LASSERT(context_handle->mech_type->gm_ops->gss_verify_mic); + + return context_handle->mech_type->gm_ops + ->gss_verify_mic(context_handle, + msgcnt, + msg, + iovcnt, + iovs, + mic_token); +} + +__u32 lgss_wrap(struct gss_ctx *context_handle, + rawobj_t *gsshdr, + rawobj_t *msg, + int msg_buflen, + rawobj_t *out_token) +{ + LASSERT(context_handle); + LASSERT(context_handle->mech_type); + LASSERT(context_handle->mech_type->gm_ops); + LASSERT(context_handle->mech_type->gm_ops->gss_wrap); + + return context_handle->mech_type->gm_ops + ->gss_wrap(context_handle, gsshdr, msg, msg_buflen, out_token); +} + +__u32 lgss_unwrap(struct gss_ctx *context_handle, + rawobj_t *gsshdr, + rawobj_t *token, + rawobj_t *out_msg) +{ + LASSERT(context_handle); + LASSERT(context_handle->mech_type); + LASSERT(context_handle->mech_type->gm_ops); + LASSERT(context_handle->mech_type->gm_ops->gss_unwrap); + + return context_handle->mech_type->gm_ops + ->gss_unwrap(context_handle, gsshdr, token, out_msg); +} + + +__u32 lgss_prep_bulk(struct gss_ctx *context_handle, + struct ptlrpc_bulk_desc *desc) +{ + LASSERT(context_handle); + LASSERT(context_handle->mech_type); + LASSERT(context_handle->mech_type->gm_ops); + LASSERT(context_handle->mech_type->gm_ops->gss_prep_bulk); + + return context_handle->mech_type->gm_ops + ->gss_prep_bulk(context_handle, desc); +} + +__u32 lgss_wrap_bulk(struct gss_ctx *context_handle, + struct ptlrpc_bulk_desc *desc, + rawobj_t *token, + int adj_nob) +{ + LASSERT(context_handle); + LASSERT(context_handle->mech_type); + LASSERT(context_handle->mech_type->gm_ops); + LASSERT(context_handle->mech_type->gm_ops->gss_wrap_bulk); + + return context_handle->mech_type->gm_ops + ->gss_wrap_bulk(context_handle, desc, token, adj_nob); +} + +__u32 lgss_unwrap_bulk(struct gss_ctx *context_handle, + struct ptlrpc_bulk_desc *desc, + rawobj_t *token, + int adj_nob) +{ + LASSERT(context_handle); + LASSERT(context_handle->mech_type); + LASSERT(context_handle->mech_type->gm_ops); + LASSERT(context_handle->mech_type->gm_ops->gss_unwrap_bulk); + + return context_handle->mech_type->gm_ops + ->gss_unwrap_bulk(context_handle, desc, token, adj_nob); +} + +/* gss_delete_sec_context: free all resources associated with context_handle. + * Note this differs from the RFC 2744-specified prototype in that we don't + * bother returning an output token, since it would never be used anyway. */ + +__u32 lgss_delete_sec_context(struct gss_ctx **context_handle) +{ + struct gss_api_mech *mech; + + CDEBUG(D_SEC, "deleting %p\n", *context_handle); + + if (!*context_handle) + return(GSS_S_NO_CONTEXT); + + mech = (*context_handle)->mech_type; + if ((*context_handle)->internal_ctx_id != 0) { + LASSERT(mech); + LASSERT(mech->gm_ops); + LASSERT(mech->gm_ops->gss_delete_sec_context); + mech->gm_ops->gss_delete_sec_context( + (*context_handle)->internal_ctx_id); + } + if (mech) + lgss_mech_put(mech); + + OBD_FREE_PTR(*context_handle); + *context_handle=NULL; + return GSS_S_COMPLETE; +} + +int lgss_display(struct gss_ctx *ctx, + char *buf, + int bufsize) +{ + LASSERT(ctx); + LASSERT(ctx->mech_type); + LASSERT(ctx->mech_type->gm_ops); + LASSERT(ctx->mech_type->gm_ops->gss_display); + + return ctx->mech_type->gm_ops->gss_display(ctx, buf, bufsize); +} |