1. 27 Feb, 2019 1 commit
  2. 26 Oct, 2018 2 commits
  3. 15 Jun, 2018 1 commit
  4. 02 Nov, 2017 1 commit
    • Greg Kroah-Hartman's avatar
      License cleanup: add SPDX GPL-2.0 license identifier to files with no license · b2441318
      Greg Kroah-Hartman authored
      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
      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: 's avatarKate Stewart <kstewart@linuxfoundation.org>
      Reviewed-by: 's avatarPhilippe Ombredanne <pombredanne@nexb.com>
      Reviewed-by: 's avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: 's avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
  5. 29 Aug, 2017 1 commit
    • Baolin Wang's avatar
      net: rxrpc: Replace time_t type with time64_t type · 10674a03
      Baolin Wang authored
      Since the 'expiry' variable of 'struct key_preparsed_payload' has been
      changed to 'time64_t' type, which is year 2038 safe on 32bits system.
      In net/rxrpc subsystem, we need convert 'u32' type to 'time64_t' type
      when copying ticket expires time to 'prep->expiry', then this patch
      introduces two helper functions to help convert 'u32' to 'time64_t'
      This patch also uses ktime_get_real_seconds() to get current time instead
      of get_seconds() which is not year 2038 safe on 32bits system.
      Signed-off-by: 's avatarBaolin Wang <baolin.wang@linaro.org>
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
  6. 03 Apr, 2017 2 commits
    • Mat Martineau's avatar
      KEYS: Split role of the keyring pointer for keyring restrict functions · aaf66c88
      Mat Martineau authored
      The first argument to the restrict_link_func_t functions was a keyring
      pointer. These functions are called by the key subsystem with this
      argument set to the destination keyring, but restrict_link_by_signature
      expects a pointer to the relevant trusted keyring.
      Restrict functions may need something other than a single struct key
      pointer to allow or reject key linkage, so the data used to make that
      decision (such as the trust keyring) is moved to a new, fourth
      argument. The first argument is now always the destination keyring.
      Signed-off-by: 's avatarMat Martineau <mathew.j.martineau@linux.intel.com>
    • David Howells's avatar
      KEYS: Add a system blacklist keyring · 734114f8
      David Howells authored
      Add the following:
       (1) A new system keyring that is used to store information about
           blacklisted certificates and signatures.
       (2) A new key type (called 'blacklist') that is used to store a
           blacklisted hash in its description as a hex string.  The key accepts
           no payload.
       (3) The ability to configure a list of blacklisted hashes into the kernel
           at build time.  This is done by setting
           CONFIG_SYSTEM_BLACKLIST_HASH_LIST to the filename of a list of hashes
           that are in the form:
      	"<hash>", "<hash>", ..., "<hash>"
           where each <hash> is a hex string representation of the hash and must
           include all necessary leading zeros to pad the hash to the right size.
      The above are enabled with CONFIG_SYSTEM_BLACKLIST_KEYRING.
      Once the kernel is booted, the blacklist keyring can be listed:
      	root@andromeda ~]# keyctl show %:.blacklist
      	 723359729 ---lswrv      0     0  keyring: .blacklist
      	 676257228 ---lswrv      0     0   \_ blacklist: 123412341234c55c1dcc601ab8e172917706aa32fb5eaf826813547fdf02dd46
      The blacklist cannot currently be modified by userspace, but it will be
      possible to load it, for example, from the UEFI blacklist database.
      A later commit will make it possible to load blacklisted asymmetric keys in
      here too.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
  7. 01 Mar, 2017 1 commit
    • David Howells's avatar
      KEYS: Differentiate uses of rcu_dereference_key() and user_key_payload() · 0837e49a
      David Howells authored
      rcu_dereference_key() and user_key_payload() are currently being used in
      two different, incompatible ways:
       (1) As a wrapper to rcu_dereference() - when only the RCU read lock used
           to protect the key.
       (2) As a wrapper to rcu_dereference_protected() - when the key semaphor is
           used to protect the key and the may be being modified.
      Fix this by splitting both of the key wrappers to produce:
       (1) RCU accessors for keys when caller has the key semaphore locked:
       (2) RCU accessors for keys when caller holds the RCU read lock:
      This should fix following warning in the NFS idmapper
        [ INFO: suspicious RCU usage. ]
        4.10.0 #1 Tainted: G        W
        ./include/keys/user-type.h:53 suspicious rcu_dereference_protected() usage!
        other info that might help us debug this:
        rcu_scheduler_active = 2, debug_locks = 0
        1 lock held by mount.nfs/5987:
          #0:  (rcu_read_lock){......}, at: [<d000000002527abc>] nfs_idmap_get_key+0x15c/0x420 [nfsv4]
        stack backtrace:
        CPU: 1 PID: 5987 Comm: mount.nfs Tainted: G        W       4.10.0 #1
        Call Trace:
          dump_stack+0xe8/0x154 (unreliable)
          nfs_idmap_get_key+0x380/0x420 [nfsv4]
          nfs_map_name_to_uid+0x2a0/0x3b0 [nfsv4]
          decode_getfattr_attrs+0xfac/0x16b0 [nfsv4]
          decode_getfattr_generic.constprop.106+0xbc/0x150 [nfsv4]
          nfs4_xdr_dec_lookup_root+0xac/0xb0 [nfsv4]
          rpcauth_unwrap_resp+0xe8/0x140 [sunrpc]
          call_decode+0x29c/0x910 [sunrpc]
          __rpc_execute+0x140/0x8f0 [sunrpc]
          rpc_run_task+0x170/0x200 [sunrpc]
          nfs4_call_sync_sequence+0x68/0xa0 [nfsv4]
          _nfs4_lookup_root.isra.44+0xd0/0xf0 [nfsv4]
          nfs4_lookup_root+0xe0/0x350 [nfsv4]
          nfs4_lookup_root_sec+0x70/0xa0 [nfsv4]
          nfs4_find_root_sec+0xc4/0x100 [nfsv4]
          nfs4_proc_get_rootfh+0x5c/0xf0 [nfsv4]
          nfs4_get_rootfh+0x6c/0x190 [nfsv4]
          nfs4_server_common_setup+0xc4/0x260 [nfsv4]
          nfs4_create_server+0x278/0x3c0 [nfsv4]
          nfs4_remote_mount+0x50/0xb0 [nfsv4]
          nfs_do_root_mount+0xb0/0x140 [nfsv4]
          nfs4_try_mount+0x60/0x100 [nfsv4]
          nfs_fs_mount+0x5ec/0xda0 [nfs]
      Reported-by: 's avatarJan Stancek <jstancek@redhat.com>
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      Tested-by: 's avatarJan Stancek <jstancek@redhat.com>
      Signed-off-by: 's avatarJames Morris <james.l.morris@oracle.com>
  8. 14 Jun, 2016 1 commit
  9. 11 Apr, 2016 6 commits
    • David Howells's avatar
      IMA: Use the the system trusted keyrings instead of .ima_mok · 56104cf2
      David Howells authored
      that, when enabled, allows keys to be added to the IMA keyrings by
      userspace - with the restriction that each must be signed by a key in the
      system trusted keyrings.
      EPERM will be returned if this option is disabled, ENOKEY will be returned if
      no authoritative key can be found and EKEYREJECTED will be returned if the
      signature doesn't match.  Other errors such as ENOPKG may also be returned.
      If this new option is enabled, the builtin system keyring is searched, as is
      the secondary system keyring if that is also enabled.  Intermediate keys
      between the builtin system keyring and the key being added can be added to
      the secondary keyring (which replaces .ima_mok) to form a trust chain -
      provided they are also validly signed by a key in one of the trusted keyrings.
      The .ima_mok keyring is then removed and the IMA blacklist keyring gets its
      own config option (IMA_BLACKLIST_KEYRING).
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: 's avatarMimi Zohar <zohar@linux.vnet.ibm.com>
    • David Howells's avatar
      certs: Add a secondary system keyring that can be added to dynamically · d3bfe841
      David Howells authored
      Add a secondary system keyring that can be added to by root whilst the
      system is running - provided the key being added is vouched for by a key
      built into the kernel or already added to the secondary keyring.
      Rename .system_keyring to .builtin_trusted_keys to distinguish it more
      obviously from the new keyring (called .secondary_trusted_keys).
      The new keyring needs to be enabled with CONFIG_SECONDARY_TRUSTED_KEYRING.
      If the secondary keyring is enabled, a link is created from that to
      .builtin_trusted_keys so that the the latter will automatically be searched
      too if the secondary keyring is searched.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
    • David Howells's avatar
      KEYS: Remove KEY_FLAG_TRUSTED and KEY_ALLOC_TRUSTED · 77f68bac
      David Howells authored
      Remove KEY_FLAG_TRUSTED and KEY_ALLOC_TRUSTED as they're no longer
      meaningful.  Also we can drop the trusted flag from the preparse structure.
      Given this, we no longer need to pass the key flags through to
      Further, we can now get rid of keyring_restrict_trusted_only() also.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
    • David Howells's avatar
      KEYS: Move the point of trust determination to __key_link() · a511e1af
      David Howells authored
      Move the point at which a key is determined to be trustworthy to
      __key_link() so that we use the contents of the keyring being linked in to
      to determine whether the key being linked in is trusted or not.
      What is 'trusted' then becomes a matter of what's in the keyring.
      Currently, the test is done when the key is parsed, but given that at that
      point we can only sensibly refer to the contents of the system trusted
      keyring, we can only use that as the basis for working out the
      trustworthiness of a new key.
      With this change, a trusted keyring is a set of keys that once the
      trusted-only flag is set cannot be added to except by verification through
      one of the contained keys.
      Further, adding a key into a trusted keyring, whilst it might grant
      trustworthiness in the context of that keyring, does not automatically
      grant trustworthiness in the context of a second keyring to which it could
      be secondarily linked.
      To accomplish this, the authentication data associated with the key source
      must now be retained.  For an X.509 cert, this means the contents of the
      AuthorityKeyIdentifier and the signature data.
      If system keyrings are disabled then restrict_link_by_builtin_trusted()
      resolves to restrict_link_reject().  The integrity digital signature code
      still works correctly with this as it was previously using
      KEY_FLAG_TRUSTED_ONLY, which doesn't permit anything to be added if there
      is no system keyring against which trust can be determined.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
    • David Howells's avatar
      KEYS: Generalise x509_request_asymmetric_key() · 9eb02989
      David Howells authored
      Generalise x509_request_asymmetric_key().  It doesn't really have any
      dependencies on X.509 features as it uses generalised IDs and the
      public_key structs that contain data extracted from X.509.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
    • David Howells's avatar
      KEYS: Move x509_request_asymmetric_key() to asymmetric_type.c · 983023f2
      David Howells authored
      Move x509_request_asymmetric_key() to asymmetric_type.c so that it can be
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
  10. 06 Apr, 2016 2 commits
  11. 10 Feb, 2016 1 commit
  12. 20 Dec, 2015 2 commits
  13. 15 Dec, 2015 1 commit
    • Petko Manolov's avatar
      IMA: create machine owner and blacklist keyrings · 41c89b64
      Petko Manolov authored
      This option creates IMA MOK and blacklist keyrings.  IMA MOK is an
      intermediate keyring that sits between .system and .ima keyrings,
      effectively forming a simple CA hierarchy.  To successfully import a key
      into .ima_mok it must be signed by a key which CA is in .system keyring.
      On turn any key that needs to go in .ima keyring must be signed by CA in
      either .system or .ima_mok keyrings. IMA MOK is empty at kernel boot.
      IMA blacklist keyring contains all revoked IMA keys.  It is consulted
      before any other keyring.  If the search is successful the requested
      operation is rejected and error is returned to the caller.
      Signed-off-by: 's avatarPetko Manolov <petkan@mip-labs.com>
      Signed-off-by: 's avatarMimi Zohar <zohar@linux.vnet.ibm.com>
  14. 21 Oct, 2015 1 commit
    • David Howells's avatar
      KEYS: Merge the type-specific data with the payload data · 146aa8b1
      David Howells authored
      Merge the type-specific data with the payload data into one four-word chunk
      as it seems pointless to keep them separate.
      Use user_key_payload() for accessing the payloads of overloaded
      user-defined keys.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      cc: linux-cifs@vger.kernel.org
      cc: ecryptfs@vger.kernel.org
      cc: linux-ext4@vger.kernel.org
      cc: linux-f2fs-devel@lists.sourceforge.net
      cc: linux-nfs@vger.kernel.org
      cc: ceph-devel@vger.kernel.org
      cc: linux-ima-devel@lists.sourceforge.net
  15. 18 Oct, 2015 2 commits
  16. 12 Aug, 2015 1 commit
    • David Howells's avatar
      PKCS#7: Appropriately restrict authenticated attributes and content type · 99db4435
      David Howells authored
      A PKCS#7 or CMS message can have per-signature authenticated attributes
      that are digested as a lump and signed by the authorising key for that
      signature.  If such attributes exist, the content digest isn't itself
      signed, but rather it is included in a special authattr which then
      contributes to the signature.
      Further, we already require the master message content type to be
      pkcs7_signedData - but there's also a separate content type for the data
      itself within the SignedData object and this must be repeated inside the
      authattrs for each signer [RFC2315 9.2, RFC5652 11.1].
      We should really validate the authattrs if they exist or forbid them
      entirely as appropriate.  To this end:
       (1) Alter the PKCS#7 parser to reject any message that has more than one
           signature where at least one signature has authattrs and at least one
           that does not.
       (2) Validate authattrs if they are present and strongly restrict them.
           Only the following authattrs are permitted and all others are
           (a) contentType.  This is checked to be an OID that matches the
           	 content type in the SignedData object.
           (b) messageDigest.  This must match the crypto digest of the data.
           (c) signingTime.  If present, we check that this is a valid, parseable
           	 UTCTime or GeneralTime and that the date it encodes fits within
           	 the validity window of the matching X.509 cert.
           (d) S/MIME capabilities.  We don't check the contents.
           (e) Authenticode SP Opus Info.  We don't check the contents.
           (f) Authenticode Statement Type.  We don't check the contents.
           The message is rejected if (a) or (b) are missing.  If the message is
           an Authenticode type, the message is rejected if (e) is missing; if
           not Authenticode, the message is rejected if (d) - (f) are present.
           The S/MIME capabilities authattr (d) unfortunately has to be allowed
           to support kernels already signed by the pesign program.  This only
           affects kexec.  sign-file suppresses them (CMS_NOSMIMECAP).
           The message is also rejected if an authattr is given more than once or
           if it contains more than one element in its set of values.
       (3) Add a parameter to pkcs7_verify() to select one of the following
           restrictions and pass in the appropriate option from the callers:
      	 This requires that the SignedData content type be pkcs7-data and
      	 forbids authattrs.  sign-file sets CMS_NOATTR.  We could be more
      	 flexible and permit authattrs optionally, but only permit minimal
      	 This requires that the SignedData content type be pkcs7-data and
      	 requires authattrs.  In future, this will require an attribute
      	 holding the target firmware name in addition to the minimal set.
      	 This requires that the SignedData content type be pkcs7-data but
      	 allows either no authattrs or only permits the minimal set.
      	 This only supports the Authenticode SPC_INDIRECT_DATA content type
      	 and requires at least an SpcSpOpusInfo authattr in addition to the
      	 minimal set.  It also permits an SPC_STATEMENT_TYPE authattr (and
      	 an S/MIME capabilities authattr because the pesign program doesn't
      	 remove these).
      	 These are invalid in this context but are included for later use
      	 when limiting the use of X.509 certs.
       (4) The pkcs7_test key type is given a module parameter to select between
           the above options for testing purposes.  For example:
      	echo 1 >/sys/module/pkcs7_test_key/parameters/usage
      	keyctl padd pkcs7_test foo @s </tmp/stuff.pkcs7
           will attempt to check the signature on stuff.pkcs7 as if it contains a
           firmware blob (1 being VERIFYING_FIRMWARE_SIGNATURE).
      Suggested-by: 's avatarAndy Lutomirski <luto@kernel.org>
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      Reviewed-by: Marcel Holtmann's avatarMarcel Holtmann <marcel@holtmann.org>
      Reviewed-by: 's avatarDavid Woodhouse <David.Woodhouse@intel.com>
  17. 07 Aug, 2015 1 commit
    • David Howells's avatar
      MODSIGN: Extract the blob PKCS#7 signature verifier from module signing · 091f6e26
      David Howells authored
      Extract the function that drives the PKCS#7 signature verification given a
      data blob and a PKCS#7 blob out from the module signing code and lump it with
      the system keyring code as it's generic.  This makes it independent of module
      config options and opens it to use by the firmware loader.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      Cc: Luis R. Rodriguez <mcgrof@suse.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Ming Lei <ming.lei@canonical.com>
      Cc: Seth Forshee <seth.forshee@canonical.com>
      Cc: Kyle McMartin <kyle@kernel.org>
  18. 06 Oct, 2014 1 commit
  19. 16 Sep, 2014 3 commits
    • David Howells's avatar
      KEYS: Implement binary asymmetric key ID handling · 7901c1a8
      David Howells authored
      Implement the first step in using binary key IDs for asymmetric keys rather
      than hex string keys.
      The previously added match data preparsing will be able to convert hex
      criterion strings into binary which can then be compared more rapidly.
      Further, we actually want more then one ID string per public key.  The problem
      is that X.509 certs refer to other X.509 certs by matching Issuer + AuthKeyId
      to Subject + SubjKeyId, but PKCS#7 messages match against X.509 Issuer +
      This patch just provides facilities for a later patch to make use of.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      Acked-by: Vivek Goyal's avatarVivek Goyal <vgoyal@redhat.com>
    • David Howells's avatar
      KEYS: Remove key_type::match in favour of overriding default by match_preparse · c06cfb08
      David Howells authored
      A previous patch added a ->match_preparse() method to the key type.  This is
      allowed to override the function called by the iteration algorithm.
      Therefore, we can just set a default that simply checks for an exact match of
      the key description with the original criterion data and allow match_preparse
      to override it as needed.
      The key_type::match op is then redundant and can be removed, as can the
      user_match() function.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      Acked-by: Vivek Goyal's avatarVivek Goyal <vgoyal@redhat.com>
    • David Howells's avatar
      KEYS: Preparse match data · 46291959
      David Howells authored
      Preparse the match data.  This provides several advantages:
       (1) The preparser can reject invalid criteria up front.
       (2) The preparser can convert the criteria to binary data if necessary (the
           asymmetric key type really wants to do binary comparison of the key IDs).
       (3) The preparser can set the type of search to be performed.  This means
           that it's not then a one-off setting in the key type.
       (4) The preparser can set an appropriate comparator function.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      Acked-by: Vivek Goyal's avatarVivek Goyal <vgoyal@redhat.com>
  20. 22 Jul, 2014 2 commits
  21. 17 Jul, 2014 1 commit
  22. 25 Sep, 2013 1 commit
  23. 24 Sep, 2013 2 commits
    • David Howells's avatar
      KEYS: Implement a big key type that can save to tmpfs · ab3c3587
      David Howells authored
      Implement a big key type that can save its contents to tmpfs and thus
      swapspace when memory is tight.  This is useful for Kerberos ticket caches.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      Tested-by: Simo Sorce's avatarSimo Sorce <simo@redhat.com>
    • David Howells's avatar
      KEYS: Expand the capacity of a keyring · b2a4df20
      David Howells authored
      Expand the capacity of a keyring to be able to hold a lot more keys by using
      the previously added associative array implementation.  Currently the maximum
      capacity is:
      	(PAGE_SIZE - sizeof(header)) / sizeof(struct key *)
      which, on a 64-bit system, is a little more 500.  However, since this is being
      used for the NFS uid mapper, we need more than that.  The new implementation
      gives us effectively unlimited capacity.
      With some alterations, the keyutils testsuite runs successfully to completion
      after this patch is applied.  The alterations are because (a) keyrings that
      are simply added to no longer appear ordered and (b) some of the errors have
      changed a bit.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
  24. 08 Oct, 2012 3 commits
    • David Howells's avatar
      KEYS: Asymmetric key pluggable data parsers · 46c6f177
      David Howells authored
      The instantiation data passed to the asymmetric key type are expected to be
      formatted in some way, and there are several possible standard ways to format
      the data.
      The two obvious standards are OpenPGP keys and X.509 certificates.  The latter
      is especially useful when dealing with UEFI, and the former might be useful
      when dealing with, say, eCryptfs.
      Further, it might be desirable to provide formatted blobs that indicate
      hardware is to be accessed to retrieve the keys or that the keys live
      unretrievably in a hardware store, but that the keys can be used by means of
      the hardware.
      From userspace, the keys can be loaded using the keyctl command, for example,
      an X.509 binary certificate:
      	keyctl padd asymmetric foo @s <dhowells.pem
      or a PGP key:
      	keyctl padd asymmetric bar @s <dhowells.pub
      or a pointer into the contents of the TPM:
      	keyctl add asymmetric zebra "TPM:04982390582905f8" @s
      Inside the kernel, pluggable parsers register themselves and then get to
      examine the payload data to see if they can handle it.  If they can, they get
        (1) Propose a name for the key, to be used it the name is "" or NULL.
        (2) Specify the key subtype.
        (3) Provide the data for the subtype.
      The key type asks the parser to do its stuff before a key is allocated and thus
      before the name is set.  If successful, the parser stores the suggested data
      into the key_preparsed_payload struct, which will be either used (if the key is
      successfully created and instantiated or updated) or discarded.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: 's avatarRusty Russell <rusty@rustcorp.com.au>
    • David Howells's avatar
      KEYS: Implement asymmetric key type · 964f3b3b
      David Howells authored
      Create a key type that can be used to represent an asymmetric key type for use
      in appropriate cryptographic operations, such as encryption, decryption,
      signature generation and signature verification.
      The key type is "asymmetric" and can provide access to a variety of
      cryptographic algorithms.
      Possibly, this would be better as "public_key" - but that has the disadvantage
      that "public key" is an overloaded term.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: 's avatarRusty Russell <rusty@rustcorp.com.au>
    • David Howells's avatar
      KEYS: Add payload preparsing opportunity prior to key instantiate or update · cf7f601c
      David Howells authored
      Give the key type the opportunity to preparse the payload prior to the
      instantiation and update routines being called.  This is done with the
      provision of two new key type operations:
      	int (*preparse)(struct key_preparsed_payload *prep);
      	void (*free_preparse)(struct key_preparsed_payload *prep);
      If the first operation is present, then it is called before key creation (in
      the add/update case) or before the key semaphore is taken (in the update and
      instantiate cases).  The second operation is called to clean up if the first
      was called.
      preparse() is given the opportunity to fill in the following structure:
      	struct key_preparsed_payload {
      		char		*description;
      		void		*type_data[2];
      		void		*payload;
      		const void	*data;
      		size_t		datalen;
      		size_t		quotalen;
      Before the preparser is called, the first three fields will have been cleared,
      the payload pointer and size will be stored in data and datalen and the default
      quota size from the key_type struct will be stored into quotalen.
      The preparser may parse the payload in any way it likes and may store data in
      the type_data[] and payload fields for use by the instantiate() and update()
      The preparser may also propose a description for the key by attaching it as a
      string to the description field.  This can be used by passing a NULL or ""
      description to the add_key() system call or the key_create_or_update()
      function.  This cannot work with request_key() as that required the description
      to tell the upcall about the key to be created.
      This, for example permits keys that store PGP public keys to generate their own
      name from the user ID and public key fingerprint in the key.
      The instantiate() and update() operations are then modified to look like this:
      	int (*instantiate)(struct key *key, struct key_preparsed_payload *prep);
      	int (*update)(struct key *key, struct key_preparsed_payload *prep);
      and the new payload data is passed in *prep, whether or not it was preparsed.
      Signed-off-by: 's avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: 's avatarRusty Russell <rusty@rustcorp.com.au>