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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/sunrpc/auth_gss/gss_krb5_mech.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'net/sunrpc/auth_gss/gss_krb5_mech.c')
-rw-r--r-- | net/sunrpc/auth_gss/gss_krb5_mech.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/net/sunrpc/auth_gss/gss_krb5_mech.c b/net/sunrpc/auth_gss/gss_krb5_mech.c new file mode 100644 index 000000000000..cf726510df8e --- /dev/null +++ b/net/sunrpc/auth_gss/gss_krb5_mech.c @@ -0,0 +1,275 @@ +/* + * linux/net/sunrpc/gss_krb5_mech.c + * + * Copyright (c) 2001 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/gss_krb5.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; + 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); + res->len = len; + return q; +} + +static inline const void * +get_key(const void *p, const void *end, struct crypto_tfm **res) +{ + struct xdr_netobj key; + int alg, alg_mode; + char *alg_name; + + p = simple_get_bytes(p, end, &alg, sizeof(alg)); + if (IS_ERR(p)) + goto out_err; + p = simple_get_netobj(p, end, &key); + if (IS_ERR(p)) + goto out_err; + + switch (alg) { + case ENCTYPE_DES_CBC_RAW: + alg_name = "des"; + alg_mode = CRYPTO_TFM_MODE_CBC; + break; + default: + dprintk("RPC: get_key: unsupported algorithm %d\n", alg); + goto out_err_free_key; + } + if (!(*res = crypto_alloc_tfm(alg_name, alg_mode))) + goto out_err_free_key; + if (crypto_cipher_setkey(*res, key.data, key.len)) + goto out_err_free_tfm; + + kfree(key.data); + return p; + +out_err_free_tfm: + crypto_free_tfm(*res); +out_err_free_key: + kfree(key.data); + p = ERR_PTR(-EINVAL); +out_err: + return p; +} + +static int +gss_import_sec_context_kerberos(const void *p, + size_t len, + struct gss_ctx *ctx_id) +{ + const void *end = (const void *)((const char *)p + len); + struct krb5_ctx *ctx; + + if (!(ctx = kmalloc(sizeof(*ctx), GFP_KERNEL))) + goto out_err; + memset(ctx, 0, sizeof(*ctx)); + + p = simple_get_bytes(p, end, &ctx->initiate, sizeof(ctx->initiate)); + if (IS_ERR(p)) + goto out_err_free_ctx; + p = simple_get_bytes(p, end, &ctx->seed_init, sizeof(ctx->seed_init)); + if (IS_ERR(p)) + goto out_err_free_ctx; + p = simple_get_bytes(p, end, ctx->seed, sizeof(ctx->seed)); + if (IS_ERR(p)) + goto out_err_free_ctx; + p = simple_get_bytes(p, end, &ctx->signalg, sizeof(ctx->signalg)); + if (IS_ERR(p)) + goto out_err_free_ctx; + p = simple_get_bytes(p, end, &ctx->sealalg, sizeof(ctx->sealalg)); + 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; + p = simple_get_bytes(p, end, &ctx->seq_send, sizeof(ctx->seq_send)); + if (IS_ERR(p)) + goto out_err_free_ctx; + p = simple_get_netobj(p, end, &ctx->mech_used); + if (IS_ERR(p)) + goto out_err_free_ctx; + p = get_key(p, end, &ctx->enc); + if (IS_ERR(p)) + goto out_err_free_mech; + p = get_key(p, end, &ctx->seq); + if (IS_ERR(p)) + goto out_err_free_key1; + if (p != end) { + p = ERR_PTR(-EFAULT); + goto out_err_free_key2; + } + + ctx_id->internal_ctx_id = ctx; + dprintk("RPC: Succesfully imported new context.\n"); + return 0; + +out_err_free_key2: + crypto_free_tfm(ctx->seq); +out_err_free_key1: + crypto_free_tfm(ctx->enc); +out_err_free_mech: + kfree(ctx->mech_used.data); +out_err_free_ctx: + kfree(ctx); +out_err: + return PTR_ERR(p); +} + +static void +gss_delete_sec_context_kerberos(void *internal_ctx) { + struct krb5_ctx *kctx = internal_ctx; + + if (kctx->seq) + crypto_free_tfm(kctx->seq); + if (kctx->enc) + crypto_free_tfm(kctx->enc); + if (kctx->mech_used.data) + kfree(kctx->mech_used.data); + kfree(kctx); +} + +static u32 +gss_verify_mic_kerberos(struct gss_ctx *ctx, + struct xdr_buf *message, + struct xdr_netobj *mic_token, + u32 *qstate) { + u32 maj_stat = 0; + int qop_state; + struct krb5_ctx *kctx = ctx->internal_ctx_id; + + maj_stat = krb5_read_token(kctx, mic_token, message, &qop_state, + KG_TOK_MIC_MSG); + if (!maj_stat && qop_state) + *qstate = qop_state; + + dprintk("RPC: gss_verify_mic_kerberos returning %d\n", maj_stat); + return maj_stat; +} + +static u32 +gss_get_mic_kerberos(struct gss_ctx *ctx, + u32 qop, + struct xdr_buf *message, + struct xdr_netobj *mic_token) { + u32 err = 0; + struct krb5_ctx *kctx = ctx->internal_ctx_id; + + err = krb5_make_token(kctx, qop, message, mic_token, KG_TOK_MIC_MSG); + + dprintk("RPC: gss_get_mic_kerberos returning %d\n",err); + + return err; +} + +static struct gss_api_ops gss_kerberos_ops = { + .gss_import_sec_context = gss_import_sec_context_kerberos, + .gss_get_mic = gss_get_mic_kerberos, + .gss_verify_mic = gss_verify_mic_kerberos, + .gss_delete_sec_context = gss_delete_sec_context_kerberos, +}; + +static struct pf_desc gss_kerberos_pfs[] = { + [0] = { + .pseudoflavor = RPC_AUTH_GSS_KRB5, + .service = RPC_GSS_SVC_NONE, + .name = "krb5", + }, + [1] = { + .pseudoflavor = RPC_AUTH_GSS_KRB5I, + .service = RPC_GSS_SVC_INTEGRITY, + .name = "krb5i", + }, +}; + +static struct gss_api_mech gss_kerberos_mech = { + .gm_name = "krb5", + .gm_owner = THIS_MODULE, + .gm_ops = &gss_kerberos_ops, + .gm_pf_num = ARRAY_SIZE(gss_kerberos_pfs), + .gm_pfs = gss_kerberos_pfs, +}; + +static int __init init_kerberos_module(void) +{ + int status; + + status = gss_mech_register(&gss_kerberos_mech); + if (status) + printk("Failed to register kerberos gss mechanism!\n"); + return status; +} + +static void __exit cleanup_kerberos_module(void) +{ + gss_mech_unregister(&gss_kerberos_mech); +} + +MODULE_LICENSE("GPL"); +module_init(init_kerberos_module); +module_exit(cleanup_kerberos_module); |