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b24413180f
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
828 lines
20 KiB
C
828 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/ceph/ceph_debug.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/random.h>
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#include <linux/slab.h>
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#include <linux/ceph/decode.h>
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#include <linux/ceph/auth.h>
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#include <linux/ceph/libceph.h>
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#include <linux/ceph/messenger.h>
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#include "crypto.h"
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#include "auth_x.h"
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#include "auth_x_protocol.h"
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static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed);
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static int ceph_x_is_authenticated(struct ceph_auth_client *ac)
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{
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struct ceph_x_info *xi = ac->private;
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int need;
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ceph_x_validate_tickets(ac, &need);
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dout("ceph_x_is_authenticated want=%d need=%d have=%d\n",
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ac->want_keys, need, xi->have_keys);
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return (ac->want_keys & xi->have_keys) == ac->want_keys;
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}
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static int ceph_x_should_authenticate(struct ceph_auth_client *ac)
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{
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struct ceph_x_info *xi = ac->private;
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int need;
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ceph_x_validate_tickets(ac, &need);
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dout("ceph_x_should_authenticate want=%d need=%d have=%d\n",
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ac->want_keys, need, xi->have_keys);
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return need != 0;
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}
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static int ceph_x_encrypt_offset(void)
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{
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return sizeof(u32) + sizeof(struct ceph_x_encrypt_header);
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}
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static int ceph_x_encrypt_buflen(int ilen)
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{
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return ceph_x_encrypt_offset() + ilen + 16;
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}
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static int ceph_x_encrypt(struct ceph_crypto_key *secret, void *buf,
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int buf_len, int plaintext_len)
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{
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struct ceph_x_encrypt_header *hdr = buf + sizeof(u32);
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int ciphertext_len;
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int ret;
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hdr->struct_v = 1;
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hdr->magic = cpu_to_le64(CEPHX_ENC_MAGIC);
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ret = ceph_crypt(secret, true, buf + sizeof(u32), buf_len - sizeof(u32),
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plaintext_len + sizeof(struct ceph_x_encrypt_header),
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&ciphertext_len);
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if (ret)
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return ret;
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ceph_encode_32(&buf, ciphertext_len);
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return sizeof(u32) + ciphertext_len;
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}
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static int ceph_x_decrypt(struct ceph_crypto_key *secret, void **p, void *end)
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{
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struct ceph_x_encrypt_header *hdr = *p + sizeof(u32);
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int ciphertext_len, plaintext_len;
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int ret;
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ceph_decode_32_safe(p, end, ciphertext_len, e_inval);
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ceph_decode_need(p, end, ciphertext_len, e_inval);
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ret = ceph_crypt(secret, false, *p, end - *p, ciphertext_len,
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&plaintext_len);
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if (ret)
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return ret;
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if (hdr->struct_v != 1 || le64_to_cpu(hdr->magic) != CEPHX_ENC_MAGIC)
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return -EPERM;
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*p += ciphertext_len;
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return plaintext_len - sizeof(struct ceph_x_encrypt_header);
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e_inval:
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return -EINVAL;
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}
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/*
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* get existing (or insert new) ticket handler
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*/
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static struct ceph_x_ticket_handler *
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get_ticket_handler(struct ceph_auth_client *ac, int service)
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{
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struct ceph_x_ticket_handler *th;
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struct ceph_x_info *xi = ac->private;
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struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node;
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while (*p) {
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parent = *p;
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th = rb_entry(parent, struct ceph_x_ticket_handler, node);
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if (service < th->service)
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p = &(*p)->rb_left;
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else if (service > th->service)
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p = &(*p)->rb_right;
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else
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return th;
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}
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/* add it */
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th = kzalloc(sizeof(*th), GFP_NOFS);
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if (!th)
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return ERR_PTR(-ENOMEM);
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th->service = service;
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rb_link_node(&th->node, parent, p);
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rb_insert_color(&th->node, &xi->ticket_handlers);
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return th;
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}
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static void remove_ticket_handler(struct ceph_auth_client *ac,
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struct ceph_x_ticket_handler *th)
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{
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struct ceph_x_info *xi = ac->private;
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dout("remove_ticket_handler %p %d\n", th, th->service);
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rb_erase(&th->node, &xi->ticket_handlers);
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ceph_crypto_key_destroy(&th->session_key);
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if (th->ticket_blob)
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ceph_buffer_put(th->ticket_blob);
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kfree(th);
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}
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static int process_one_ticket(struct ceph_auth_client *ac,
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struct ceph_crypto_key *secret,
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void **p, void *end)
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{
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struct ceph_x_info *xi = ac->private;
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int type;
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u8 tkt_struct_v, blob_struct_v;
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struct ceph_x_ticket_handler *th;
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void *dp, *dend;
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int dlen;
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char is_enc;
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struct timespec validity;
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void *tp, *tpend;
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void **ptp;
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struct ceph_crypto_key new_session_key = { 0 };
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struct ceph_buffer *new_ticket_blob;
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unsigned long new_expires, new_renew_after;
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u64 new_secret_id;
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int ret;
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ceph_decode_need(p, end, sizeof(u32) + 1, bad);
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type = ceph_decode_32(p);
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dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));
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tkt_struct_v = ceph_decode_8(p);
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if (tkt_struct_v != 1)
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goto bad;
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th = get_ticket_handler(ac, type);
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if (IS_ERR(th)) {
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ret = PTR_ERR(th);
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goto out;
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}
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/* blob for me */
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dp = *p + ceph_x_encrypt_offset();
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ret = ceph_x_decrypt(secret, p, end);
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if (ret < 0)
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goto out;
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dout(" decrypted %d bytes\n", ret);
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dend = dp + ret;
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tkt_struct_v = ceph_decode_8(&dp);
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if (tkt_struct_v != 1)
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goto bad;
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ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
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if (ret)
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goto out;
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ceph_decode_timespec(&validity, dp);
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dp += sizeof(struct ceph_timespec);
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new_expires = get_seconds() + validity.tv_sec;
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new_renew_after = new_expires - (validity.tv_sec / 4);
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dout(" expires=%lu renew_after=%lu\n", new_expires,
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new_renew_after);
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/* ticket blob for service */
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ceph_decode_8_safe(p, end, is_enc, bad);
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if (is_enc) {
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/* encrypted */
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tp = *p + ceph_x_encrypt_offset();
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ret = ceph_x_decrypt(&th->session_key, p, end);
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if (ret < 0)
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goto out;
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dout(" encrypted ticket, decrypted %d bytes\n", ret);
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ptp = &tp;
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tpend = tp + ret;
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} else {
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/* unencrypted */
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ptp = p;
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tpend = end;
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}
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ceph_decode_32_safe(ptp, tpend, dlen, bad);
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dout(" ticket blob is %d bytes\n", dlen);
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ceph_decode_need(ptp, tpend, 1 + sizeof(u64), bad);
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blob_struct_v = ceph_decode_8(ptp);
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if (blob_struct_v != 1)
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goto bad;
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new_secret_id = ceph_decode_64(ptp);
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ret = ceph_decode_buffer(&new_ticket_blob, ptp, tpend);
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if (ret)
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goto out;
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/* all is well, update our ticket */
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ceph_crypto_key_destroy(&th->session_key);
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if (th->ticket_blob)
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ceph_buffer_put(th->ticket_blob);
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th->session_key = new_session_key;
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th->ticket_blob = new_ticket_blob;
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th->secret_id = new_secret_id;
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th->expires = new_expires;
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th->renew_after = new_renew_after;
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th->have_key = true;
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dout(" got ticket service %d (%s) secret_id %lld len %d\n",
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type, ceph_entity_type_name(type), th->secret_id,
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(int)th->ticket_blob->vec.iov_len);
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xi->have_keys |= th->service;
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return 0;
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bad:
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ret = -EINVAL;
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out:
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ceph_crypto_key_destroy(&new_session_key);
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return ret;
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}
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static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
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struct ceph_crypto_key *secret,
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void *buf, void *end)
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{
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void *p = buf;
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u8 reply_struct_v;
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u32 num;
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int ret;
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ceph_decode_8_safe(&p, end, reply_struct_v, bad);
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if (reply_struct_v != 1)
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return -EINVAL;
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ceph_decode_32_safe(&p, end, num, bad);
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dout("%d tickets\n", num);
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while (num--) {
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ret = process_one_ticket(ac, secret, &p, end);
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if (ret)
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return ret;
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}
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return 0;
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bad:
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return -EINVAL;
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}
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static void ceph_x_authorizer_cleanup(struct ceph_x_authorizer *au)
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{
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ceph_crypto_key_destroy(&au->session_key);
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if (au->buf) {
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ceph_buffer_put(au->buf);
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au->buf = NULL;
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}
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}
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static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
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struct ceph_x_ticket_handler *th,
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struct ceph_x_authorizer *au)
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{
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int maxlen;
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struct ceph_x_authorize_a *msg_a;
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struct ceph_x_authorize_b *msg_b;
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void *p, *end;
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int ret;
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int ticket_blob_len =
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(th->ticket_blob ? th->ticket_blob->vec.iov_len : 0);
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dout("build_authorizer for %s %p\n",
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ceph_entity_type_name(th->service), au);
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ceph_crypto_key_destroy(&au->session_key);
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ret = ceph_crypto_key_clone(&au->session_key, &th->session_key);
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if (ret)
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goto out_au;
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maxlen = sizeof(*msg_a) + ticket_blob_len +
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ceph_x_encrypt_buflen(sizeof(*msg_b));
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dout(" need len %d\n", maxlen);
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if (au->buf && au->buf->alloc_len < maxlen) {
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ceph_buffer_put(au->buf);
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au->buf = NULL;
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}
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if (!au->buf) {
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au->buf = ceph_buffer_new(maxlen, GFP_NOFS);
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if (!au->buf) {
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ret = -ENOMEM;
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goto out_au;
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}
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}
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au->service = th->service;
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au->secret_id = th->secret_id;
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msg_a = au->buf->vec.iov_base;
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msg_a->struct_v = 1;
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msg_a->global_id = cpu_to_le64(ac->global_id);
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msg_a->service_id = cpu_to_le32(th->service);
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msg_a->ticket_blob.struct_v = 1;
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msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id);
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msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len);
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if (ticket_blob_len) {
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memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base,
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th->ticket_blob->vec.iov_len);
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}
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dout(" th %p secret_id %lld %lld\n", th, th->secret_id,
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le64_to_cpu(msg_a->ticket_blob.secret_id));
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p = msg_a + 1;
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p += ticket_blob_len;
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end = au->buf->vec.iov_base + au->buf->vec.iov_len;
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msg_b = p + ceph_x_encrypt_offset();
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msg_b->struct_v = 1;
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get_random_bytes(&au->nonce, sizeof(au->nonce));
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msg_b->nonce = cpu_to_le64(au->nonce);
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ret = ceph_x_encrypt(&au->session_key, p, end - p, sizeof(*msg_b));
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if (ret < 0)
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goto out_au;
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p += ret;
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WARN_ON(p > end);
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au->buf->vec.iov_len = p - au->buf->vec.iov_base;
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dout(" built authorizer nonce %llx len %d\n", au->nonce,
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(int)au->buf->vec.iov_len);
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return 0;
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out_au:
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ceph_x_authorizer_cleanup(au);
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return ret;
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}
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static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th,
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void **p, void *end)
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{
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ceph_decode_need(p, end, 1 + sizeof(u64), bad);
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ceph_encode_8(p, 1);
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ceph_encode_64(p, th->secret_id);
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if (th->ticket_blob) {
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const char *buf = th->ticket_blob->vec.iov_base;
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u32 len = th->ticket_blob->vec.iov_len;
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ceph_encode_32_safe(p, end, len, bad);
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ceph_encode_copy_safe(p, end, buf, len, bad);
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} else {
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ceph_encode_32_safe(p, end, 0, bad);
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}
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return 0;
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bad:
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return -ERANGE;
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}
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static bool need_key(struct ceph_x_ticket_handler *th)
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{
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if (!th->have_key)
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return true;
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return get_seconds() >= th->renew_after;
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}
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static bool have_key(struct ceph_x_ticket_handler *th)
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{
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if (th->have_key) {
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if (get_seconds() >= th->expires)
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th->have_key = false;
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}
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return th->have_key;
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}
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|
|
static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed)
|
|
{
|
|
int want = ac->want_keys;
|
|
struct ceph_x_info *xi = ac->private;
|
|
int service;
|
|
|
|
*pneed = ac->want_keys & ~(xi->have_keys);
|
|
|
|
for (service = 1; service <= want; service <<= 1) {
|
|
struct ceph_x_ticket_handler *th;
|
|
|
|
if (!(ac->want_keys & service))
|
|
continue;
|
|
|
|
if (*pneed & service)
|
|
continue;
|
|
|
|
th = get_ticket_handler(ac, service);
|
|
if (IS_ERR(th)) {
|
|
*pneed |= service;
|
|
continue;
|
|
}
|
|
|
|
if (need_key(th))
|
|
*pneed |= service;
|
|
if (!have_key(th))
|
|
xi->have_keys &= ~service;
|
|
}
|
|
}
|
|
|
|
static int ceph_x_build_request(struct ceph_auth_client *ac,
|
|
void *buf, void *end)
|
|
{
|
|
struct ceph_x_info *xi = ac->private;
|
|
int need;
|
|
struct ceph_x_request_header *head = buf;
|
|
int ret;
|
|
struct ceph_x_ticket_handler *th =
|
|
get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);
|
|
|
|
if (IS_ERR(th))
|
|
return PTR_ERR(th);
|
|
|
|
ceph_x_validate_tickets(ac, &need);
|
|
|
|
dout("build_request want %x have %x need %x\n",
|
|
ac->want_keys, xi->have_keys, need);
|
|
|
|
if (need & CEPH_ENTITY_TYPE_AUTH) {
|
|
struct ceph_x_authenticate *auth = (void *)(head + 1);
|
|
void *p = auth + 1;
|
|
void *enc_buf = xi->auth_authorizer.enc_buf;
|
|
struct ceph_x_challenge_blob *blob = enc_buf +
|
|
ceph_x_encrypt_offset();
|
|
u64 *u;
|
|
|
|
if (p > end)
|
|
return -ERANGE;
|
|
|
|
dout(" get_auth_session_key\n");
|
|
head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY);
|
|
|
|
/* encrypt and hash */
|
|
get_random_bytes(&auth->client_challenge, sizeof(u64));
|
|
blob->client_challenge = auth->client_challenge;
|
|
blob->server_challenge = cpu_to_le64(xi->server_challenge);
|
|
ret = ceph_x_encrypt(&xi->secret, enc_buf, CEPHX_AU_ENC_BUF_LEN,
|
|
sizeof(*blob));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
auth->struct_v = 1;
|
|
auth->key = 0;
|
|
for (u = (u64 *)enc_buf; u + 1 <= (u64 *)(enc_buf + ret); u++)
|
|
auth->key ^= *(__le64 *)u;
|
|
dout(" server_challenge %llx client_challenge %llx key %llx\n",
|
|
xi->server_challenge, le64_to_cpu(auth->client_challenge),
|
|
le64_to_cpu(auth->key));
|
|
|
|
/* now encode the old ticket if exists */
|
|
ret = ceph_x_encode_ticket(th, &p, end);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return p - buf;
|
|
}
|
|
|
|
if (need) {
|
|
void *p = head + 1;
|
|
struct ceph_x_service_ticket_request *req;
|
|
|
|
if (p > end)
|
|
return -ERANGE;
|
|
head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY);
|
|
|
|
ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer);
|
|
if (ret)
|
|
return ret;
|
|
ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base,
|
|
xi->auth_authorizer.buf->vec.iov_len);
|
|
|
|
req = p;
|
|
req->keys = cpu_to_le32(need);
|
|
p += sizeof(*req);
|
|
return p - buf;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result,
|
|
void *buf, void *end)
|
|
{
|
|
struct ceph_x_info *xi = ac->private;
|
|
struct ceph_x_reply_header *head = buf;
|
|
struct ceph_x_ticket_handler *th;
|
|
int len = end - buf;
|
|
int op;
|
|
int ret;
|
|
|
|
if (result)
|
|
return result; /* XXX hmm? */
|
|
|
|
if (xi->starting) {
|
|
/* it's a hello */
|
|
struct ceph_x_server_challenge *sc = buf;
|
|
|
|
if (len != sizeof(*sc))
|
|
return -EINVAL;
|
|
xi->server_challenge = le64_to_cpu(sc->server_challenge);
|
|
dout("handle_reply got server challenge %llx\n",
|
|
xi->server_challenge);
|
|
xi->starting = false;
|
|
xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH;
|
|
return -EAGAIN;
|
|
}
|
|
|
|
op = le16_to_cpu(head->op);
|
|
result = le32_to_cpu(head->result);
|
|
dout("handle_reply op %d result %d\n", op, result);
|
|
switch (op) {
|
|
case CEPHX_GET_AUTH_SESSION_KEY:
|
|
/* verify auth key */
|
|
ret = ceph_x_proc_ticket_reply(ac, &xi->secret,
|
|
buf + sizeof(*head), end);
|
|
break;
|
|
|
|
case CEPHX_GET_PRINCIPAL_SESSION_KEY:
|
|
th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);
|
|
if (IS_ERR(th))
|
|
return PTR_ERR(th);
|
|
ret = ceph_x_proc_ticket_reply(ac, &th->session_key,
|
|
buf + sizeof(*head), end);
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
if (ret)
|
|
return ret;
|
|
if (ac->want_keys == xi->have_keys)
|
|
return 0;
|
|
return -EAGAIN;
|
|
}
|
|
|
|
static void ceph_x_destroy_authorizer(struct ceph_authorizer *a)
|
|
{
|
|
struct ceph_x_authorizer *au = (void *)a;
|
|
|
|
ceph_x_authorizer_cleanup(au);
|
|
kfree(au);
|
|
}
|
|
|
|
static int ceph_x_create_authorizer(
|
|
struct ceph_auth_client *ac, int peer_type,
|
|
struct ceph_auth_handshake *auth)
|
|
{
|
|
struct ceph_x_authorizer *au;
|
|
struct ceph_x_ticket_handler *th;
|
|
int ret;
|
|
|
|
th = get_ticket_handler(ac, peer_type);
|
|
if (IS_ERR(th))
|
|
return PTR_ERR(th);
|
|
|
|
au = kzalloc(sizeof(*au), GFP_NOFS);
|
|
if (!au)
|
|
return -ENOMEM;
|
|
|
|
au->base.destroy = ceph_x_destroy_authorizer;
|
|
|
|
ret = ceph_x_build_authorizer(ac, th, au);
|
|
if (ret) {
|
|
kfree(au);
|
|
return ret;
|
|
}
|
|
|
|
auth->authorizer = (struct ceph_authorizer *) au;
|
|
auth->authorizer_buf = au->buf->vec.iov_base;
|
|
auth->authorizer_buf_len = au->buf->vec.iov_len;
|
|
auth->authorizer_reply_buf = au->enc_buf;
|
|
auth->authorizer_reply_buf_len = CEPHX_AU_ENC_BUF_LEN;
|
|
auth->sign_message = ac->ops->sign_message;
|
|
auth->check_message_signature = ac->ops->check_message_signature;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ceph_x_update_authorizer(
|
|
struct ceph_auth_client *ac, int peer_type,
|
|
struct ceph_auth_handshake *auth)
|
|
{
|
|
struct ceph_x_authorizer *au;
|
|
struct ceph_x_ticket_handler *th;
|
|
|
|
th = get_ticket_handler(ac, peer_type);
|
|
if (IS_ERR(th))
|
|
return PTR_ERR(th);
|
|
|
|
au = (struct ceph_x_authorizer *)auth->authorizer;
|
|
if (au->secret_id < th->secret_id) {
|
|
dout("ceph_x_update_authorizer service %u secret %llu < %llu\n",
|
|
au->service, au->secret_id, th->secret_id);
|
|
return ceph_x_build_authorizer(ac, th, au);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac,
|
|
struct ceph_authorizer *a)
|
|
{
|
|
struct ceph_x_authorizer *au = (void *)a;
|
|
void *p = au->enc_buf;
|
|
struct ceph_x_authorize_reply *reply = p + ceph_x_encrypt_offset();
|
|
int ret;
|
|
|
|
ret = ceph_x_decrypt(&au->session_key, &p, p + CEPHX_AU_ENC_BUF_LEN);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret != sizeof(*reply))
|
|
return -EPERM;
|
|
|
|
if (au->nonce + 1 != le64_to_cpu(reply->nonce_plus_one))
|
|
ret = -EPERM;
|
|
else
|
|
ret = 0;
|
|
dout("verify_authorizer_reply nonce %llx got %llx ret %d\n",
|
|
au->nonce, le64_to_cpu(reply->nonce_plus_one), ret);
|
|
return ret;
|
|
}
|
|
|
|
static void ceph_x_reset(struct ceph_auth_client *ac)
|
|
{
|
|
struct ceph_x_info *xi = ac->private;
|
|
|
|
dout("reset\n");
|
|
xi->starting = true;
|
|
xi->server_challenge = 0;
|
|
}
|
|
|
|
static void ceph_x_destroy(struct ceph_auth_client *ac)
|
|
{
|
|
struct ceph_x_info *xi = ac->private;
|
|
struct rb_node *p;
|
|
|
|
dout("ceph_x_destroy %p\n", ac);
|
|
ceph_crypto_key_destroy(&xi->secret);
|
|
|
|
while ((p = rb_first(&xi->ticket_handlers)) != NULL) {
|
|
struct ceph_x_ticket_handler *th =
|
|
rb_entry(p, struct ceph_x_ticket_handler, node);
|
|
remove_ticket_handler(ac, th);
|
|
}
|
|
|
|
ceph_x_authorizer_cleanup(&xi->auth_authorizer);
|
|
|
|
kfree(ac->private);
|
|
ac->private = NULL;
|
|
}
|
|
|
|
static void invalidate_ticket(struct ceph_auth_client *ac, int peer_type)
|
|
{
|
|
struct ceph_x_ticket_handler *th;
|
|
|
|
th = get_ticket_handler(ac, peer_type);
|
|
if (!IS_ERR(th))
|
|
th->have_key = false;
|
|
}
|
|
|
|
static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac,
|
|
int peer_type)
|
|
{
|
|
/*
|
|
* We are to invalidate a service ticket in the hopes of
|
|
* getting a new, hopefully more valid, one. But, we won't get
|
|
* it unless our AUTH ticket is good, so invalidate AUTH ticket
|
|
* as well, just in case.
|
|
*/
|
|
invalidate_ticket(ac, peer_type);
|
|
invalidate_ticket(ac, CEPH_ENTITY_TYPE_AUTH);
|
|
}
|
|
|
|
static int calc_signature(struct ceph_x_authorizer *au, struct ceph_msg *msg,
|
|
__le64 *psig)
|
|
{
|
|
void *enc_buf = au->enc_buf;
|
|
struct {
|
|
__le32 len;
|
|
__le32 header_crc;
|
|
__le32 front_crc;
|
|
__le32 middle_crc;
|
|
__le32 data_crc;
|
|
} __packed *sigblock = enc_buf + ceph_x_encrypt_offset();
|
|
int ret;
|
|
|
|
sigblock->len = cpu_to_le32(4*sizeof(u32));
|
|
sigblock->header_crc = msg->hdr.crc;
|
|
sigblock->front_crc = msg->footer.front_crc;
|
|
sigblock->middle_crc = msg->footer.middle_crc;
|
|
sigblock->data_crc = msg->footer.data_crc;
|
|
ret = ceph_x_encrypt(&au->session_key, enc_buf, CEPHX_AU_ENC_BUF_LEN,
|
|
sizeof(*sigblock));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*psig = *(__le64 *)(enc_buf + sizeof(u32));
|
|
return 0;
|
|
}
|
|
|
|
static int ceph_x_sign_message(struct ceph_auth_handshake *auth,
|
|
struct ceph_msg *msg)
|
|
{
|
|
__le64 sig;
|
|
int ret;
|
|
|
|
if (ceph_test_opt(from_msgr(msg->con->msgr), NOMSGSIGN))
|
|
return 0;
|
|
|
|
ret = calc_signature((struct ceph_x_authorizer *)auth->authorizer,
|
|
msg, &sig);
|
|
if (ret)
|
|
return ret;
|
|
|
|
msg->footer.sig = sig;
|
|
msg->footer.flags |= CEPH_MSG_FOOTER_SIGNED;
|
|
return 0;
|
|
}
|
|
|
|
static int ceph_x_check_message_signature(struct ceph_auth_handshake *auth,
|
|
struct ceph_msg *msg)
|
|
{
|
|
__le64 sig_check;
|
|
int ret;
|
|
|
|
if (ceph_test_opt(from_msgr(msg->con->msgr), NOMSGSIGN))
|
|
return 0;
|
|
|
|
ret = calc_signature((struct ceph_x_authorizer *)auth->authorizer,
|
|
msg, &sig_check);
|
|
if (ret)
|
|
return ret;
|
|
if (sig_check == msg->footer.sig)
|
|
return 0;
|
|
if (msg->footer.flags & CEPH_MSG_FOOTER_SIGNED)
|
|
dout("ceph_x_check_message_signature %p has signature %llx "
|
|
"expect %llx\n", msg, msg->footer.sig, sig_check);
|
|
else
|
|
dout("ceph_x_check_message_signature %p sender did not set "
|
|
"CEPH_MSG_FOOTER_SIGNED\n", msg);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
static const struct ceph_auth_client_ops ceph_x_ops = {
|
|
.name = "x",
|
|
.is_authenticated = ceph_x_is_authenticated,
|
|
.should_authenticate = ceph_x_should_authenticate,
|
|
.build_request = ceph_x_build_request,
|
|
.handle_reply = ceph_x_handle_reply,
|
|
.create_authorizer = ceph_x_create_authorizer,
|
|
.update_authorizer = ceph_x_update_authorizer,
|
|
.verify_authorizer_reply = ceph_x_verify_authorizer_reply,
|
|
.invalidate_authorizer = ceph_x_invalidate_authorizer,
|
|
.reset = ceph_x_reset,
|
|
.destroy = ceph_x_destroy,
|
|
.sign_message = ceph_x_sign_message,
|
|
.check_message_signature = ceph_x_check_message_signature,
|
|
};
|
|
|
|
|
|
int ceph_x_init(struct ceph_auth_client *ac)
|
|
{
|
|
struct ceph_x_info *xi;
|
|
int ret;
|
|
|
|
dout("ceph_x_init %p\n", ac);
|
|
ret = -ENOMEM;
|
|
xi = kzalloc(sizeof(*xi), GFP_NOFS);
|
|
if (!xi)
|
|
goto out;
|
|
|
|
ret = -EINVAL;
|
|
if (!ac->key) {
|
|
pr_err("no secret set (for auth_x protocol)\n");
|
|
goto out_nomem;
|
|
}
|
|
|
|
ret = ceph_crypto_key_clone(&xi->secret, ac->key);
|
|
if (ret < 0) {
|
|
pr_err("cannot clone key: %d\n", ret);
|
|
goto out_nomem;
|
|
}
|
|
|
|
xi->starting = true;
|
|
xi->ticket_handlers = RB_ROOT;
|
|
|
|
ac->protocol = CEPH_AUTH_CEPHX;
|
|
ac->private = xi;
|
|
ac->ops = &ceph_x_ops;
|
|
return 0;
|
|
|
|
out_nomem:
|
|
kfree(xi);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
|