Linux-2.6.12-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!

1 files changed, 202 insertions, 0 deletions

diff --git a/net/sunrpc/auth_gss/gss_krb5_unseal.c b/net/sunrpc/auth_gss/gss_krb5_unseal.c
new file mode 100644
index 000000000000..8767fc53183d
--- /dev/null
+++ b/net/sunrpc/auth_gss/gss_krb5_unseal.c
@@ -0,0 +1,202 @@
+/*
+ *  linux/net/sunrpc/gss_krb5_unseal.c
+ *
+ *  Adapted from MIT Kerberos 5-1.2.1 lib/gssapi/krb5/k5unseal.c
+ *
+ *  Copyright (c) 2000 The Regents of the University of Michigan.
+ *  All rights reserved.
+ *
+ *  Andy Adamson   <andros@umich.edu>
+ */
+
+/*
+ * Copyright 1993 by OpenVision Technologies, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appears in all copies and
+ * that both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of OpenVision not be used
+ * in advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. OpenVision makes no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ * OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+ * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * Copyright (C) 1998 by the FundsXpress, INC.
+ *
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may require
+ * a specific license from the United States Government.  It is the
+ * responsibility of any person or organization contemplating export to
+ * obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of FundsXpress. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  FundsXpress makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/sunrpc/gss_krb5.h>
+#include <linux/crypto.h>
+
+#ifdef RPC_DEBUG
+# define RPCDBG_FACILITY        RPCDBG_AUTH
+#endif
+
+
+/* message_buffer is an input if toktype is MIC and an output if it is WRAP:
+ * If toktype is MIC: read_token is a mic token, and message_buffer is the
+ *   data that the mic was supposedly taken over.
+ * If toktype is WRAP: read_token is a wrap token, and message_buffer is used
+ *   to return the decrypted data.
+ */
+
+/* XXX will need to change prototype and/or just split into a separate function
+ * when we add privacy (because read_token will be in pages too). */
+u32
+krb5_read_token(struct krb5_ctx *ctx,
+                struct xdr_netobj *read_token,
+                struct xdr_buf *message_buffer,
+                int *qop_state, int toktype)
+{
+        int                     signalg;
+        int                     sealalg;
+        s32                     checksum_type;
+        struct xdr_netobj       md5cksum = {.len = 0, .data = NULL};
+        s32                     now;
+        int                     direction;
+        s32                     seqnum;
+        unsigned char           *ptr = (unsigned char *)read_token->data;
+        int                     bodysize;
+        u32                     ret = GSS_S_DEFECTIVE_TOKEN;
+
+        dprintk("RPC:      krb5_read_token\n");
+
+        if (g_verify_token_header(&ctx->mech_used, &bodysize, &ptr,
+                                        read_token->len))
+                goto out;
+
+        if ((*ptr++ != ((toktype>>8)&0xff)) || (*ptr++ != (toktype&0xff)))
+                goto out;
+
+        /* XXX sanity-check bodysize?? */
+
+        if (toktype == KG_TOK_WRAP_MSG) {
+                /* XXX gone */
+                goto out;
+        }
+
+        /* get the sign and seal algorithms */
+
+        signalg = ptr[0] + (ptr[1] << 8);
+        sealalg = ptr[2] + (ptr[3] << 8);
+
+        /* Sanity checks */
+
+        if ((ptr[4] != 0xff) || (ptr[5] != 0xff))
+                goto out;
+
+        if (((toktype != KG_TOK_WRAP_MSG) && (sealalg != 0xffff)) ||
+            ((toktype == KG_TOK_WRAP_MSG) && (sealalg == 0xffff)))
+                goto out;
+
+        /* in the current spec, there is only one valid seal algorithm per
+           key type, so a simple comparison is ok */
+
+        if ((toktype == KG_TOK_WRAP_MSG) && !(sealalg == ctx->sealalg))
+                goto out;
+
+        /* there are several mappings of seal algorithms to sign algorithms,
+           but few enough that we can try them all. */
+
+        if ((ctx->sealalg == SEAL_ALG_NONE && signalg > 1) ||
+            (ctx->sealalg == SEAL_ALG_1 && signalg != SGN_ALG_3) ||
+            (ctx->sealalg == SEAL_ALG_DES3KD &&
+             signalg != SGN_ALG_HMAC_SHA1_DES3_KD))
+                goto out;
+
+        /* compute the checksum of the message */
+
+        /* initialize the the cksum */
+        switch (signalg) {
+        case SGN_ALG_DES_MAC_MD5:
+                checksum_type = CKSUMTYPE_RSA_MD5;
+                break;
+        default:
+                ret = GSS_S_DEFECTIVE_TOKEN;
+                goto out;
+        }
+
+        switch (signalg) {
+        case SGN_ALG_DES_MAC_MD5:
+                ret = make_checksum(checksum_type, ptr - 2, 8,
+                                         message_buffer, &md5cksum);
+                if (ret)
+                        goto out;
+
+                ret = krb5_encrypt(ctx->seq, NULL, md5cksum.data,
+                                   md5cksum.data, 16);
+                if (ret)
+                        goto out;
+
+                if (memcmp(md5cksum.data + 8, ptr + 14, 8)) {
+                        ret = GSS_S_BAD_SIG;
+                        goto out;
+                }
+                break;
+        default:
+                ret = GSS_S_DEFECTIVE_TOKEN;
+                goto out;
+        }
+
+        /* it got through unscathed.  Make sure the context is unexpired */
+
+        if (qop_state)
+                *qop_state = GSS_C_QOP_DEFAULT;
+
+        now = get_seconds();
+
+        ret = GSS_S_CONTEXT_EXPIRED;
+        if (now > ctx->endtime)
+                goto out;
+
+        /* do sequencing checks */
+
+        ret = GSS_S_BAD_SIG;
+        if ((ret = krb5_get_seq_num(ctx->seq, ptr + 14, ptr + 6, &direction,
+                                    &seqnum)))
+                goto out;
+
+        if ((ctx->initiate && direction != 0xff) ||
+            (!ctx->initiate && direction != 0))
+                goto out;
+
+        ret = GSS_S_COMPLETE;
+out:
+        if (md5cksum.data) kfree(md5cksum.data);
+        return ret;
+}