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[/] [or1k_soc_on_altera_embedded_dev_kit/] [tags/] [linux-2.6/] [linux-2.6.24_or32_unified_v2.3/] [net/] [sunrpc/] [auth_gss/] [gss_spkm3_mech.c] - Rev 8
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/* * linux/net/sunrpc/gss_spkm3_mech.c * * Copyright (c) 2003 The Regents of the University of Michigan. * All rights reserved. * * Andy Adamson <andros@umich.edu> * 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. * */ #include <linux/err.h> #include <linux/module.h> #include <linux/init.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/sunrpc/auth.h> #include <linux/in.h> #include <linux/sunrpc/svcauth_gss.h> #include <linux/sunrpc/gss_spkm3.h> #include <linux/sunrpc/xdr.h> #include <linux/crypto.h> #ifdef RPC_DEBUG # define RPCDBG_FACILITY RPCDBG_AUTH #endif static const void * simple_get_bytes(const void *p, const void *end, void *res, int len) { const void *q = (const void *)((const char *)p + len); if (unlikely(q > end || q < p)) return ERR_PTR(-EFAULT); memcpy(res, p, len); return q; } static const void * simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res) { const void *q; unsigned int len; p = simple_get_bytes(p, end, &len, sizeof(len)); if (IS_ERR(p)) return p; res->len = len; if (len == 0) { res->data = NULL; return p; } q = (const void *)((const char *)p + len); if (unlikely(q > end || q < p)) return ERR_PTR(-EFAULT); res->data = kmemdup(p, len, GFP_KERNEL); if (unlikely(res->data == NULL)) return ERR_PTR(-ENOMEM); return q; } static int gss_import_sec_context_spkm3(const void *p, size_t len, struct gss_ctx *ctx_id) { const void *end = (const void *)((const char *)p + len); struct spkm3_ctx *ctx; int version; if (!(ctx = kzalloc(sizeof(*ctx), GFP_KERNEL))) goto out_err; p = simple_get_bytes(p, end, &version, sizeof(version)); if (IS_ERR(p)) goto out_err_free_ctx; if (version != 1) { dprintk("RPC: unknown spkm3 token format: " "obsolete nfs-utils?\n"); goto out_err_free_ctx; } p = simple_get_netobj(p, end, &ctx->ctx_id); if (IS_ERR(p)) goto out_err_free_ctx; p = simple_get_bytes(p, end, &ctx->endtime, sizeof(ctx->endtime)); if (IS_ERR(p)) goto out_err_free_ctx_id; p = simple_get_netobj(p, end, &ctx->mech_used); if (IS_ERR(p)) goto out_err_free_ctx_id; p = simple_get_bytes(p, end, &ctx->ret_flags, sizeof(ctx->ret_flags)); if (IS_ERR(p)) goto out_err_free_mech; p = simple_get_netobj(p, end, &ctx->conf_alg); if (IS_ERR(p)) goto out_err_free_mech; p = simple_get_netobj(p, end, &ctx->derived_conf_key); if (IS_ERR(p)) goto out_err_free_conf_alg; p = simple_get_netobj(p, end, &ctx->intg_alg); if (IS_ERR(p)) goto out_err_free_conf_key; p = simple_get_netobj(p, end, &ctx->derived_integ_key); if (IS_ERR(p)) goto out_err_free_intg_alg; if (p != end) goto out_err_free_intg_key; ctx_id->internal_ctx_id = ctx; dprintk("RPC: Successfully imported new spkm context.\n"); return 0; out_err_free_intg_key: kfree(ctx->derived_integ_key.data); out_err_free_intg_alg: kfree(ctx->intg_alg.data); out_err_free_conf_key: kfree(ctx->derived_conf_key.data); out_err_free_conf_alg: kfree(ctx->conf_alg.data); out_err_free_mech: kfree(ctx->mech_used.data); out_err_free_ctx_id: kfree(ctx->ctx_id.data); out_err_free_ctx: kfree(ctx); out_err: return PTR_ERR(p); } static void gss_delete_sec_context_spkm3(void *internal_ctx) { struct spkm3_ctx *sctx = internal_ctx; kfree(sctx->derived_integ_key.data); kfree(sctx->intg_alg.data); kfree(sctx->derived_conf_key.data); kfree(sctx->conf_alg.data); kfree(sctx->mech_used.data); kfree(sctx->ctx_id.data); kfree(sctx); } static u32 gss_verify_mic_spkm3(struct gss_ctx *ctx, struct xdr_buf *signbuf, struct xdr_netobj *checksum) { u32 maj_stat = 0; struct spkm3_ctx *sctx = ctx->internal_ctx_id; maj_stat = spkm3_read_token(sctx, checksum, signbuf, SPKM_MIC_TOK); dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat); return maj_stat; } static u32 gss_get_mic_spkm3(struct gss_ctx *ctx, struct xdr_buf *message_buffer, struct xdr_netobj *message_token) { u32 err = 0; struct spkm3_ctx *sctx = ctx->internal_ctx_id; err = spkm3_make_token(sctx, message_buffer, message_token, SPKM_MIC_TOK); dprintk("RPC: gss_get_mic_spkm3 returning %d\n", err); return err; } static const struct gss_api_ops gss_spkm3_ops = { .gss_import_sec_context = gss_import_sec_context_spkm3, .gss_get_mic = gss_get_mic_spkm3, .gss_verify_mic = gss_verify_mic_spkm3, .gss_delete_sec_context = gss_delete_sec_context_spkm3, }; static struct pf_desc gss_spkm3_pfs[] = { {RPC_AUTH_GSS_SPKM, RPC_GSS_SVC_NONE, "spkm3"}, {RPC_AUTH_GSS_SPKMI, RPC_GSS_SVC_INTEGRITY, "spkm3i"}, }; static struct gss_api_mech gss_spkm3_mech = { .gm_name = "spkm3", .gm_owner = THIS_MODULE, .gm_oid = {7, "\053\006\001\005\005\001\003"}, .gm_ops = &gss_spkm3_ops, .gm_pf_num = ARRAY_SIZE(gss_spkm3_pfs), .gm_pfs = gss_spkm3_pfs, }; static int __init init_spkm3_module(void) { int status; status = gss_mech_register(&gss_spkm3_mech); if (status) printk("Failed to register spkm3 gss mechanism!\n"); return status; } static void __exit cleanup_spkm3_module(void) { gss_mech_unregister(&gss_spkm3_mech); } MODULE_LICENSE("GPL"); module_init(init_spkm3_module); module_exit(cleanup_spkm3_module);