# define RPCDBG_FACILITY RPCDBG_AUTH
#endif
-static inline int
-get_bytes(char **ptr, const char *end, void *res, int len)
+static const void *
+simple_get_bytes(const void *p, const void *end, void *res, int len)
{
- char *p, *q;
- p = *ptr;
- q = p + len;
- if (q > end || q < p)
- return -1;
+ const void *q = (const void *)((const char *)p + len);
+ if (unlikely(q > end || q < p))
+ return ERR_PTR(-EFAULT);
memcpy(res, p, len);
- *ptr = q;
- return 0;
+ return q;
}
-static inline int
-get_netobj(char **ptr, const char *end, struct xdr_netobj *res)
+static const void *
+simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res)
{
- char *p, *q;
- p = *ptr;
- if (get_bytes(&p, end, &res->len, sizeof(res->len)))
- return -1;
- q = p + res->len;
- if(res->len == 0)
- goto out_nocopy;
- if (q > end || q < p)
- return -1;
- if (!(res->data = kmalloc(res->len, GFP_KERNEL)))
- return -1;
- memcpy(res->data, p, res->len);
-out_nocopy:
- *ptr = q;
- return 0;
+ 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 int
-get_key(char **p, char *end, struct crypto_tfm **res, int *resalg)
+static inline const void *
+get_key(const void *p, const void *end, struct crypto_tfm **res, int *resalg)
{
- struct xdr_netobj key = {
- .len = 0,
- .data = NULL,
- };
+ struct xdr_netobj key = { 0 };
int alg_mode,setkey = 0;
char *alg_name;
- if (get_bytes(p, end, resalg, sizeof(int)))
+ p = simple_get_bytes(p, end, resalg, sizeof(*resalg));
+ if (IS_ERR(p))
goto out_err;
- if ((get_netobj(p, end, &key)))
+ p = simple_get_netobj(p, end, &key);
+ if (IS_ERR(p))
goto out_err;
switch (*resalg) {
alg_mode = 0;
setkey = 0;
break;
- case NID_cast5_cbc:
- dprintk("RPC: SPKM3 get_key: case cast5_cbc, UNSUPPORTED \n");
- goto out_err;
- break;
default:
dprintk("RPC: SPKM3 get_key: unsupported algorithm %d", *resalg);
goto out_err_free_key;
if(key.len > 0)
kfree(key.data);
- return 0;
+ 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 -1;
+ return p;
}
-static u32
-gss_import_sec_context_spkm3(struct xdr_netobj *inbuf,
+static int
+gss_import_sec_context_spkm3(const void *p, size_t len,
struct gss_ctx *ctx_id)
{
- char *p = inbuf->data;
- char *end = inbuf->data + inbuf->len;
+ const void *end = (const void *)((const char *)p + len);
struct spkm3_ctx *ctx;
if (!(ctx = kmalloc(sizeof(*ctx), GFP_KERNEL)))
goto out_err;
memset(ctx, 0, sizeof(*ctx));
- if (get_netobj(&p, end, &ctx->ctx_id))
+ p = simple_get_netobj(p, end, &ctx->ctx_id);
+ if (IS_ERR(p))
goto out_err_free_ctx;
- if (get_bytes(&p, end, &ctx->qop, sizeof(ctx->qop)))
+ p = simple_get_bytes(p, end, &ctx->qop, sizeof(ctx->qop));
+ if (IS_ERR(p))
goto out_err_free_ctx_id;
- if (get_netobj(&p, end, &ctx->mech_used))
+ p = simple_get_netobj(p, end, &ctx->mech_used);
+ if (IS_ERR(p))
goto out_err_free_mech;
- if (get_bytes(&p, end, &ctx->ret_flags, sizeof(ctx->ret_flags)))
+ p = simple_get_bytes(p, end, &ctx->ret_flags, sizeof(ctx->ret_flags));
+ if (IS_ERR(p))
goto out_err_free_mech;
- if (get_bytes(&p, end, &ctx->req_flags, sizeof(ctx->req_flags)))
+ p = simple_get_bytes(p, end, &ctx->req_flags, sizeof(ctx->req_flags));
+ if (IS_ERR(p))
goto out_err_free_mech;
- if (get_netobj(&p, end, &ctx->share_key))
+ p = simple_get_netobj(p, end, &ctx->share_key);
+ if (IS_ERR(p))
goto out_err_free_s_key;
- if (get_key(&p, end, &ctx->derived_conf_key, &ctx->conf_alg)) {
- dprintk("RPC: SPKM3 confidentiality key will be NULL\n");
- }
+ p = get_key(p, end, &ctx->derived_conf_key, &ctx->conf_alg);
+ if (IS_ERR(p))
+ goto out_err_free_s_key;
- if (get_key(&p, end, &ctx->derived_integ_key, &ctx->intg_alg)) {
- dprintk("RPC: SPKM3 integrity key will be NULL\n");
- }
+ p = get_key(p, end, &ctx->derived_integ_key, &ctx->intg_alg);
+ if (IS_ERR(p))
+ goto out_err_free_key1;
- if (get_bytes(&p, end, &ctx->owf_alg, sizeof(ctx->owf_alg)))
- goto out_err_free_s_key;
+ p = simple_get_bytes(p, end, &ctx->keyestb_alg, sizeof(ctx->keyestb_alg));
+ if (IS_ERR(p))
+ goto out_err_free_key2;
- if (get_bytes(&p, end, &ctx->owf_alg, sizeof(ctx->owf_alg)))
- goto out_err_free_s_key;
+ 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_s_key;
+ goto out_err_free_key2;
ctx_id->internal_ctx_id = ctx;
dprintk("Succesfully 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:
out_err_free_ctx:
kfree(ctx);
out_err:
- return GSS_S_FAILURE;
+ return PTR_ERR(p);
}
static void
git://git.onelab.eu / linux-2.6.git / blobdiff