[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / sunrpc / auth_gss / gss_spkm3_mech.c

/*
 *  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/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 = kmalloc(len, GFP_KERNEL);
	if (unlikely(res->data == NULL))
		return ERR_PTR(-ENOMEM);
	memcpy(res->data, p, len);
	return q;
}

static inline const void *
get_key(const void *p, const void *end, struct crypto_tfm **res, int *resalg)
{
	struct xdr_netobj	key = { 0 };
	int			alg_mode,setkey = 0;
	char			*alg_name;

	p = simple_get_bytes(p, end, resalg, sizeof(*resalg));
	if (IS_ERR(p))
		goto out_err;
	p = simple_get_netobj(p, end, &key);
	if (IS_ERR(p))
		goto out_err;

	switch (*resalg) {
		case NID_des_cbc:
			alg_name = "des";
			alg_mode = CRYPTO_TFM_MODE_CBC;
			setkey = 1;
			break;
		case NID_cast5_cbc:
			/* XXXX here in name only, not used */
			alg_name = "cast5";
			alg_mode = CRYPTO_TFM_MODE_CBC;
			setkey = 0; /* XXX will need to set to 1 */
			break;
		case NID_md5:
			if (key.len == 0) {
				dprintk("RPC: SPKM3 get_key: NID_md5 zero Key length\n");
			}
			alg_name = "md5";
			alg_mode = 0;
			setkey = 0;
			break;
		default:
			dprintk("gss_spkm3_mech: unsupported algorithm %d\n", *resalg);
			goto out_err_free_key;
	}
	if (!(*res = crypto_alloc_tfm(alg_name, alg_mode))) {
		printk("gss_spkm3_mech: unable to initialize crypto algorthm %s\n", alg_name);
		goto out_err_free_key;
	}
	if (setkey) {
		if (crypto_cipher_setkey(*res, key.data, key.len)) {
			printk("gss_spkm3_mech: error setting key for crypto algorthm %s\n", alg_name);
			goto out_err_free_tfm;
		}
	}

	if(key.len > 0)
		kfree(key.data);
	return p;

out_err_free_tfm:
	crypto_free_tfm(*res);
out_err_free_key:
	if(key.len > 0)
		kfree(key.data);
	p = ERR_PTR(-EINVAL);
out_err:
	return p;
}

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;

	if (!(ctx = kzalloc(sizeof(*ctx), GFP_KERNEL)))
		goto out_err;

	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->qop, sizeof(ctx->qop));
	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_mech;

	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_bytes(p, end, &ctx->req_flags, sizeof(ctx->req_flags));
	if (IS_ERR(p))
		goto out_err_free_mech;

	p = simple_get_netobj(p, end, &ctx->share_key);
	if (IS_ERR(p))
		goto out_err_free_s_key;

	p = get_key(p, end, &ctx->derived_conf_key, &ctx->conf_alg);
	if (IS_ERR(p))
		goto out_err_free_s_key;

	p = get_key(p, end, &ctx->derived_integ_key, &ctx->intg_alg);
	if (IS_ERR(p))
		goto out_err_free_key1;

	p = simple_get_bytes(p, end, &ctx->keyestb_alg, sizeof(ctx->keyestb_alg));
	if (IS_ERR(p))
		goto out_err_free_key2;

	p = simple_get_bytes(p, end, &ctx->owf_alg, sizeof(ctx->owf_alg));
	if (IS_ERR(p))
		goto out_err_free_key2;

	if (p != end)
		goto out_err_free_key2;

	ctx_id->internal_ctx_id = ctx;

	dprintk("Successfully imported new spkm context.\n");
	return 0;

out_err_free_key2:
	crypto_free_tfm(ctx->derived_integ_key);
out_err_free_key1:
	crypto_free_tfm(ctx->derived_conf_key);
out_err_free_s_key:
	kfree(ctx->share_key.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;

	crypto_free_tfm(sctx->derived_integ_key);
	crypto_free_tfm(sctx->derived_conf_key);
	kfree(sctx->share_key.data);
	kfree(sctx->mech_used.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;

	dprintk("RPC: gss_verify_mic_spkm3 calling spkm3_read_token\n");
	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;

	dprintk("RPC: gss_get_mic_spkm3\n");

	err = spkm3_make_token(sctx, message_buffer,
			      message_token, SPKM_MIC_TOK);
	return err;
}

static 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_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 0;
}

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);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/net/sunrpc/gss_spkm3_mech.c
	3	*
	4	* Copyright (c) 2003 The Regents of the University of Michigan.
	5	* All rights reserved.
	6	*
	7	* Andy Adamson <andros@umich.edu>
	8	* J. Bruce Fields <bfields@umich.edu>
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	*
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions and the following disclaimer.
	16	* 2. Redistributions in binary form must reproduce the above copyright
	17	* notice, this list of conditions and the following disclaimer in the
	18	* documentation and/or other materials provided with the distribution.
	19	* 3. Neither the name of the University nor the names of its
	20	* contributors may be used to endorse or promote products derived
	21	* from this software without specific prior written permission.
	22	*
	23	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
	24	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	25	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	26	* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	28	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	29	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
	30	* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	31	* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	32	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	33	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	34	*
	35	*/
	36
	37	#include <linux/module.h>
	38	#include <linux/init.h>
	39	#include <linux/types.h>
	40	#include <linux/slab.h>
	41	#include <linux/sunrpc/auth.h>
	42	#include <linux/in.h>
	43	#include <linux/sunrpc/svcauth_gss.h>
	44	#include <linux/sunrpc/gss_spkm3.h>
	45	#include <linux/sunrpc/xdr.h>
	46	#include <linux/crypto.h>
	47
	48	#ifdef RPC_DEBUG
	49	# define RPCDBG_FACILITY RPCDBG_AUTH
	50	#endif
	51
	52	static const void *
	53	simple_get_bytes(const void p, const void end, void *res, int len)
	54	{
	55	const void q = (const void )((const char *)p + len);
	56	if (unlikely(q > end \|\| q < p))
	57	return ERR_PTR(-EFAULT);
	58	memcpy(res, p, len);
	59	return q;
	60	}
	61
	62	static const void *
	63	simple_get_netobj(const void p, const void end, struct xdr_netobj *res)
	64	{
65	const void *q;
66	unsigned int len;
67	p = simple_get_bytes(p, end, &len, sizeof(len));
68	if (IS_ERR(p))
69	return p;
70	res->len = len;
71	if (len == 0) {
72	res->data = NULL;
73	return p;
74	}
75	q = (const void )((const char )p + len);
76	if (unlikely(q > end \|\| q < p))
77	return ERR_PTR(-EFAULT);
78	res->data = kmalloc(len, GFP_KERNEL);
79	if (unlikely(res->data == NULL))
80	return ERR_PTR(-ENOMEM);
81	memcpy(res->data, p, len);
82	return q;
83	}
84
85	static inline const void *
86	get_key(const void p, const void end, struct crypto_tfm *res, int resalg)
87	{
88	struct xdr_netobj key = { 0 };
89	int alg_mode,setkey = 0;
90	char *alg_name;
91
92	p = simple_get_bytes(p, end, resalg, sizeof(*resalg));
93	if (IS_ERR(p))
94	goto out_err;
95	p = simple_get_netobj(p, end, &key);
96	if (IS_ERR(p))
97	goto out_err;
98
99	switch (*resalg) {
100	case NID_des_cbc:
101	alg_name = "des";
102	alg_mode = CRYPTO_TFM_MODE_CBC;
103	setkey = 1;
104	break;
0e19c1ea BF	105	case NID_cast5_cbc:
	106	/* XXXX here in name only, not used */
	107	alg_name = "cast5";
	108	alg_mode = CRYPTO_TFM_MODE_CBC;
	109	setkey = 0; /* XXX will need to set to 1 */
	110	break;
1da177e4 LT	111	case NID_md5:
	112	if (key.len == 0) {
	113	dprintk("RPC: SPKM3 get_key: NID_md5 zero Key length\n");
	114	}
	115	alg_name = "md5";
	116	alg_mode = 0;
	117	setkey = 0;
	118	break;
	119	default:
42181d4b	120	dprintk("gss_spkm3_mech: unsupported algorithm %d\n", *resalg);
1da177e4 LT	121	goto out_err_free_key;
1da177e4 LT	122	}
42181d4b BF	123	if (!(*res = crypto_alloc_tfm(alg_name, alg_mode))) {
42181d4b BF	124	printk("gss_spkm3_mech: unable to initialize crypto algorthm %s\n", alg_name);
1da177e4	125	goto out_err_free_key;
42181d4b	126	}
1da177e4	127	if (setkey) {
42181d4b BF	128	if (crypto_cipher_setkey(*res, key.data, key.len)) {
42181d4b BF	129	printk("gss_spkm3_mech: error setting key for crypto algorthm %s\n", alg_name);
1da177e4	130	goto out_err_free_tfm;
42181d4b	131	}
1da177e4 LT	132	}
	133
	134	if(key.len > 0)
	135	kfree(key.data);
	136	return p;
	137
	138	out_err_free_tfm:
	139	crypto_free_tfm(*res);
	140	out_err_free_key:
	141	if(key.len > 0)
	142	kfree(key.data);
	143	p = ERR_PTR(-EINVAL);
	144	out_err:
	145	return p;
	146	}
	147
	148	static int
	149	gss_import_sec_context_spkm3(const void *p, size_t len,
	150	struct gss_ctx *ctx_id)
	151	{
	152	const void end = (const void )((const char *)p + len);
	153	struct spkm3_ctx *ctx;
	154
0da974f4	155	if (!(ctx = kzalloc(sizeof(*ctx), GFP_KERNEL)))
1da177e4	156	goto out_err;
1da177e4 LT	157
	158	p = simple_get_netobj(p, end, &ctx->ctx_id);
	159	if (IS_ERR(p))
	160	goto out_err_free_ctx;
	161
	162	p = simple_get_bytes(p, end, &ctx->qop, sizeof(ctx->qop));
	163	if (IS_ERR(p))
	164	goto out_err_free_ctx_id;
	165
	166	p = simple_get_netobj(p, end, &ctx->mech_used);
	167	if (IS_ERR(p))
	168	goto out_err_free_mech;
	169
	170	p = simple_get_bytes(p, end, &ctx->ret_flags, sizeof(ctx->ret_flags));
	171	if (IS_ERR(p))
	172	goto out_err_free_mech;
	173
	174	p = simple_get_bytes(p, end, &ctx->req_flags, sizeof(ctx->req_flags));
	175	if (IS_ERR(p))
	176	goto out_err_free_mech;
	177
	178	p = simple_get_netobj(p, end, &ctx->share_key);
	179	if (IS_ERR(p))
	180	goto out_err_free_s_key;
	181
	182	p = get_key(p, end, &ctx->derived_conf_key, &ctx->conf_alg);
	183	if (IS_ERR(p))
	184	goto out_err_free_s_key;
	185
	186	p = get_key(p, end, &ctx->derived_integ_key, &ctx->intg_alg);
	187	if (IS_ERR(p))
	188	goto out_err_free_key1;
	189
	190	p = simple_get_bytes(p, end, &ctx->keyestb_alg, sizeof(ctx->keyestb_alg));
	191	if (IS_ERR(p))
	192	goto out_err_free_key2;
	193
	194	p = simple_get_bytes(p, end, &ctx->owf_alg, sizeof(ctx->owf_alg));
	195	if (IS_ERR(p))
	196	goto out_err_free_key2;
	197
	198	if (p != end)
	199	goto out_err_free_key2;
	200
	201	ctx_id->internal_ctx_id = ctx;
	202
d6e05edc	203	dprintk("Successfully imported new spkm context.\n");
1da177e4 LT	204	return 0;
	205
	206	out_err_free_key2:
	207	crypto_free_tfm(ctx->derived_integ_key);
	208	out_err_free_key1:
	209	crypto_free_tfm(ctx->derived_conf_key);
	210	out_err_free_s_key:
	211	kfree(ctx->share_key.data);
	212	out_err_free_mech:
	213	kfree(ctx->mech_used.data);
	214	out_err_free_ctx_id:
	215	kfree(ctx->ctx_id.data);
	216	out_err_free_ctx:
	217	kfree(ctx);
	218	out_err:
	219	return PTR_ERR(p);
	220	}
	221
	222	static void
	223	gss_delete_sec_context_spkm3(void *internal_ctx) {
	224	struct spkm3_ctx *sctx = internal_ctx;
	225
573dbd95 JJ	226	crypto_free_tfm(sctx->derived_integ_key);
	227	crypto_free_tfm(sctx->derived_conf_key);
	228	kfree(sctx->share_key.data);
	229	kfree(sctx->mech_used.data);
1da177e4 LT	230	kfree(sctx);
	231	}
	232
	233	static u32
	234	gss_verify_mic_spkm3(struct gss_ctx *ctx,
	235	struct xdr_buf *signbuf,
00fd6e14 BF	236	struct xdr_netobj *checksum)
00fd6e14 BF	237	{
1da177e4	238	u32 maj_stat = 0;
1da177e4 LT	239	struct spkm3_ctx *sctx = ctx->internal_ctx_id;
	240
	241	dprintk("RPC: gss_verify_mic_spkm3 calling spkm3_read_token\n");
00fd6e14	242	maj_stat = spkm3_read_token(sctx, checksum, signbuf, SPKM_MIC_TOK);
1da177e4 LT	243
	244	dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat);
	245	return maj_stat;
	246	}
	247
	248	static u32
	249	gss_get_mic_spkm3(struct gss_ctx *ctx,
1da177e4	250	struct xdr_buf *message_buffer,
00fd6e14 BF	251	struct xdr_netobj *message_token)
00fd6e14 BF	252	{
1da177e4 LT	253	u32 err = 0;
	254	struct spkm3_ctx *sctx = ctx->internal_ctx_id;
	255
	256	dprintk("RPC: gss_get_mic_spkm3\n");
	257
00fd6e14	258	err = spkm3_make_token(sctx, message_buffer,
1da177e4 LT	259	message_token, SPKM_MIC_TOK);
	260	return err;
	261	}
	262
	263	static struct gss_api_ops gss_spkm3_ops = {
	264	.gss_import_sec_context = gss_import_sec_context_spkm3,
	265	.gss_get_mic = gss_get_mic_spkm3,
	266	.gss_verify_mic = gss_verify_mic_spkm3,
	267	.gss_delete_sec_context = gss_delete_sec_context_spkm3,
	268	};
	269
	270	static struct pf_desc gss_spkm3_pfs[] = {
00fd6e14 BF	271	{RPC_AUTH_GSS_SPKM, RPC_GSS_SVC_NONE, "spkm3"},
00fd6e14 BF	272	{RPC_AUTH_GSS_SPKMI, RPC_GSS_SVC_INTEGRITY, "spkm3i"},
1da177e4 LT	273	};
	274
	275	static struct gss_api_mech gss_spkm3_mech = {
	276	.gm_name = "spkm3",
	277	.gm_owner = THIS_MODULE,
	278	.gm_ops = &gss_spkm3_ops,
	279	.gm_pf_num = ARRAY_SIZE(gss_spkm3_pfs),
	280	.gm_pfs = gss_spkm3_pfs,
	281	};
	282
	283	static int __init init_spkm3_module(void)
	284	{
	285	int status;
	286
	287	status = gss_mech_register(&gss_spkm3_mech);
	288	if (status)
	289	printk("Failed to register spkm3 gss mechanism!\n");
	290	return 0;
	291	}
	292
	293	static void __exit cleanup_spkm3_module(void)
	294	{
	295	gss_mech_unregister(&gss_spkm3_mech);
	296	}
	297
	298	MODULE_LICENSE("GPL");
	299	module_init(init_spkm3_module);
	300	module_exit(cleanup_spkm3_module);