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* Use macro for IANA assigned PA-AS-CHECKSUM numberZhanna Tsitkov2013-04-182-4/+5
| | | | | Replace numeric value '132' by the macro KRB5_PADATA_AS_CHECKSUM in preauth plugin.
* Allow config of dh_min_bits < 2048Tom Yu2013-04-122-3/+5
| | | | | | | | | | Allow configuration to override the default dh_min_bits of 2048 to 1024. Disallow configuration of dh_min_bits < 1024, but continue to default to 2048. ticket: 7602 target_version: 1.11.3 tags: pullup
* Simplify pkinit_check_dh_paramsTom Yu2013-04-121-67/+47
| | | | | | | | | | Change pkinit_check_dh_params() to take two DH* parameters, and only compare p and g, because q is fully determined by them and might be missing. Also refactor some parameter checks into check_dh_wellknown() that were previously done separately in the pkinit_process_td_dh_params() and server_check_dh().
* Ignore missing Q in dh_paramsTom Yu2013-04-121-4/+4
| | | | | | | | | Some implementations don't send the required Q value in dh_params, so allow it to be absent. ticket: 7596 target_version: 1.11.3 tags: pullup
* Avoid passing null pointers to memcpy/memcmpGreg Hudson2013-04-081-1/+2
| | | | | | | | | | | | | | | By a strict reading of the C standard, memcpy and memcmp have undefined behavior if their pointer arguments aren't valid object pointers, even if the length argument is 0. Compilers are becoming more aggressive about breaking code with undefined behavior, so we should try to avoid it when possible. In a krb5_data object, we frequently use NULL as the data value when the length is 0. Accordingly, we should avoid copying from or comparing the data field of a length-0 krb5_data object. Add checks to our wrapper functions (like data_eq and k5_memdup) and to code which works with possibly-empty krb5_data objects. In a few places, use wrapper functions to simplify the code rather than adding checks.
* make dependGreg Hudson2013-03-241-4/+3
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* Add PEM password prompter callback in PKINITNalin Dahyabhai2013-03-151-3/+45
| | | | | | | | | | Supply a callack to PEM_read_bio_PrivateKey() using the prompter to request a password for encrypted PEM data. Otherwise OpenSSL will use the controlling terminal. [ghudson@mit.edu: minor style cleanup, commit message] ticket: 7590
* Cleaner fix for #7570Ben Kaduk2013-02-151-4/+2
| | | | Remove variables and labels which are no longer needed.
* PKINIT null pointer deref [CVE-2013-1415]Xi Wang2013-02-151-2/+1
| | | | | | | | | | | | | | | | | | | | Don't dereference a null pointer when cleaning up. The KDC plugin for PKINIT can dereference a null pointer when a malformed packet causes processing to terminate early, leading to a crash of the KDC process. An attacker would need to have a valid PKINIT certificate or have observed a successful PKINIT authentication, or an unauthenticated attacker could execute the attack if anonymous PKINIT is enabled. CVSSv2 vector: AV:N/AC:M/Au:N/C:N/I:N/A:C/E:P/RL:O/RC:C This is a minimal commit for pullup; style fixes in a followup. [kaduk@mit.edu: reformat and edit commit message] ticket: 7570 (new) target_version: 1.11.1 tags: pullup
* Modernize k5bufGreg Hudson2013-02-142-40/+30
| | | | | | Rename the krb5int_buf_ family of functions to use the k5_ prefix for brevity. Reformat some k5buf implementation code to match current practices.
* Add and use k5memdup, k5memdup0 helpersGreg Hudson2013-02-091-2/+2
| | | | | | Add k5-int.h static functions to duplicate byte ranges, optionally with a trailing zero byte, and set an error code like k5alloc does. Use them where they would shorten existing code.
* make dependGreg Hudson2013-01-101-1/+1
| | | | | Mostly this gets rid of the trailing space on line 2 after bb76891f5386526bdf91bc790c614fc9296cb5fa.
* Fix various result checksNickolai Zeldovich2013-01-071-1/+1
| | | | | | | | | | | Correct three cases where the wrong expression was checked to see if an allocation function returned null. [ghudson@mit.edu: commit message, patch splitting] ticket: 7534 target_version: 1.11.1 tags: pullup
* Separate clpreauth and kdcpreauth interfacesGreg Hudson2012-12-192-11/+21
| | | | | | | Since there is no overlap between the clpreauth and kdcpreauth interface declarations, there's no particular reason to combine them into one header. For backward compatibility and convenience, leave behind a preauth_plugin.h which includes both.
* PKINIT (draft9) null ptr deref [CVE-2012-1016]Nalin Dahyabhai2012-12-141-2/+3
| | | | | | | | | | | | | | | | | | Don't check for an agility KDF identifier in the non-draft9 reply structure when we're building a draft9 reply, because it'll be NULL. The KDC plugin for PKINIT can dereference a null pointer when handling a draft9 request, leading to a crash of the KDC process. An attacker would need to have a valid PKINIT certificate, or an unauthenticated attacker could execute the attack if anonymous PKINIT is enabled. CVSSv2 vector: AV:N/AC:M/Au:N/C:N/I:N/A:P/E:P/RL:O/RC:C [tlyu@mit.edu: reformat comment and edit log message] ticket: 7506 (new) target_version: 1.11 tags: pullup
* Fix various integer issuesGreg Hudson2012-12-101-31/+12
| | | | | | | | | | | | | | | In kdc_util.c and spnego_mech.c, error returns from ASN.1 length functions could be ignored because they were assigned to unsigned values. In spnego_mech.c, two buffer size checks could be rewritten to reduce the likelihood of pointer overflow. In dump.c and kdc_preauth.c, calloc() could be used to simplify the code and avoid multiplication overflow. In pkinit_clnt.c, the wrong value was checked for a null result from malloc(), and the code could be simplified. Reported by Nickolai Zeldovich <nickolai@csail.mit.edu>. ticket: 7488
* Don't use PA_PSEUDO in pkinit client codeGreg Hudson2012-10-221-1/+1
| | | | | PA_PSEUDO only has meaning for kdcpreauth modules. Don't use it in the flags method of the pkinit clpreauth module.
* make dependGreg Hudson2012-10-171-6/+6
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* Use config storage for client identity selectionNalin Dahyabhai2012-10-178-40/+403
| | | | | | | | * Keep track of the names of client identities when we load them. * Store the client identity we just used when we create or retry a client request. * If we read a client identity from the configuration, treat it like the KDC does: pick the "this is it, there is no other" logic branch.
* Handle anonymous-as-signed-data-with-no-signersNalin Dahyabhai2012-10-151-27/+28
| | | | | Update to generate and consume signed-data with no signer-info, which we need for anonymous PKINIT.
* Make sure that pkinit_octetstring_hkdf() inits NSSNalin Dahyabhai2012-10-151-0/+15
| | | | | Create an NSS context for use when performing KDF, so that the tests, which call into the function directly, will work.
* Don't try to free an uninitialized keyblockNalin Dahyabhai2012-10-151-2/+0
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* Sanity-check loading keys and certs from PEM filesNalin Dahyabhai2012-10-151-0/+15
| | | | | Print a debug message if we're unable to locate the matching private key for a certificate when we've just loaded both of them from PEM files.
* Reset the prompt_types list after calling prompterNalin Dahyabhai2012-10-151-0/+1
| | | | | Reset the prompt_types list immediately after the prompter callback returns, as is done everywhere else.
* Simplify pkinit_server_verify_padata slightlyGreg Hudson2012-07-051-7/+2
| | | | | Eliminate the effectively unused variable tmp_as_req, and eliminate two unnecessary conditionals for freeing pointers.
* Simplify and fix pkinit_as_req_create cleanupGreg Hudson2012-07-051-11/+5
| | | | | | Avoid dereferencing a null auth_pack pointer if we run out of memory initializing info or auth_pack. Eliminate an unnecessary switch by just cleaning up all of the potentially allocated variables.
* Fix minor memory leaks in PKINIT codeGreg Hudson2012-07-051-0/+2
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* Fix PKINIT verify_kdc_eku trace loggingGreg Hudson2012-07-051-1/+1
| | | | Test the value of the eku_accepted output parameter, not the pointer.
* Clean up const usage for supported_kdf_alg_idsBen Kaduk2012-07-032-2/+2
| | | | | The previous declaration had redundant consts and missed making the actual pointers stored in the array const.
* Handle PKINIT DH replies with no certsGreg Hudson2012-06-221-1/+8
| | | | | | | | | | | | | | | If a PKINIT Diffie-Hellman reply contains no certificates in the SignedData object, that may be because the signer certificate was a trust anchor as transmitted to the KDC. Heimdal's KDC, for instance, filters client trust anchors out of the returned set of certificates. Match against idctx->trustedCAs and idctx->intermediateCAs to handle this case. This fix only works with OpenSSL 1.0 or later; when built against OpenSSL 0.9.x, the client will still require a cert in the reply. Code changes suggested by nalin@redhat.com. ticket: 7183
* First pass at PKINIT client trace logsGreg Hudson2012-05-084-25/+156
| | | | | | Trace basic decisions about PKINIT client protocol processing. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25855 dc483132-0cff-0310-8789-dd5450dbe970
* Improve traced error messages from PKINIT clientGreg Hudson2012-05-082-2/+9
| | | | | | | | If we have no configured PKINIT client identity, or if we fail to create a certificate chain, set a reasonable error code (not EINVAL or ENOMEM) and a useful error message to appear in trace log output. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25854 dc483132-0cff-0310-8789-dd5450dbe970
* Make it easier to test SAM-2 client codeGreg Hudson2012-04-266-120/+407
| | | | | | | | | | | | | Add a method to the securid_sam2 plugin, built with alternate compile-time flags, which supplies a plain-text challenge to the client to be used as the OTP value. This lets us manually exercise the SAM-2 client code and a little bit of the KDC code. securid_make_sam_challenge_2_and_cksum is moved into the method- independent code and renamed. get_securid_edata_2 has its sc2b parameter removed as it was not used by the caller. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25832 dc483132-0cff-0310-8789-dd5450dbe970
* Minimize draft9 PKINIT code by removing dead codeGreg Hudson2012-02-118-156/+9
| | | | | | | | | | | | | | | | The PKINIT client code doesn't use decode_krb5_pa_pk_as_rep_draft9, which is fortunate because it doesn't work (see issue #7072). Instead, it passes both kinds of PKINIT replies through decode_krb5_pa_pk_as_rep, then decodes the un-enveloped CMS data in alternative 1 (encKeyPack) as either an RFC or draft9 ReplyKeyPack. So, remove the unused broken pa_pk_as_rep_draft9 decoder. For pa_pk_as_req_draft9, we only use two of the fields on encode and only one of those on decode. So, get rid of the unused fields and the krb5_trusted_ca structure, and reduce the encoder and decoder sequences to the minimum necessary fields. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25689 dc483132-0cff-0310-8789-dd5450dbe970
* Make dh_key_info encoder and decoder symmetricGreg Hudson2012-01-092-56/+7
| | | | | | | | | | | | The dh_key_info encoder expects subjectPublicKey to contain the contents of a bit string, but the decoder outputs the DER encoding of the bit string including tag. The PKINIT client code expects this, so everything works, but the encoder and decoder should be symmetric. Change the decoder to process the bit string (adding a bit string decoding primitive) and modify the PKINIT client code to expect only the bit string contents. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25626 dc483132-0cff-0310-8789-dd5450dbe970
* Remove unneeded kdcRealm field in PKINIT structureGreg Hudson2012-01-081-3/+0
| | | | | | | | krb5_pk_authenticator_draft9 had a kdcRealm field which was set by the client code but never encoded or decoded. Remove it. Eliminating this field exposed a bug in auth_pack_draft9_optional; fix that. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25624 dc483132-0cff-0310-8789-dd5450dbe970
* Convert securid module edata methodGreg Hudson2012-01-071-4/+9
| | | | | | | | | | | | r25348 made modified the edata method of the kdcpreauth interface to be async-capable, but neglected to convert the securid_sam2 module's edata function. Do that now. ticket: 7060 target_version: 1.10 tags: pullup git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25621 dc483132-0cff-0310-8789-dd5450dbe970
* Remove some unneeded accessor fieldsGreg Hudson2012-01-072-13/+0
| | | | git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25620 dc483132-0cff-0310-8789-dd5450dbe970
* Stop using krb5_typed_data structure typeGreg Hudson2011-12-214-17/+0
| | | | | | | | | | | | Use the krb5_pa_data structure type when encoding or decoding TYPED-DATA. Leave the krb5_typed_data structure definition in krb5.h with a comment saying not to use it. Remove krb5_free_typed_data (which was never declared in krb5.h). Remove some vestigial accessor stuff related to PKINIT encoding and decoding TYPED-DATA, which was unneeded since r25483. Bump the accessor structure version to 19 accordingly. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25601 dc483132-0cff-0310-8789-dd5450dbe970
* Stop using krb5_octet_dataGreg Hudson2011-12-219-130/+157
| | | | | | | | For consistency with the rest of the code base, make PKINIT use krb5_data as a pointer/length container. Leave krb5_octet_data and krb5_free_octet_data behind for API compatibility. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25600 dc483132-0cff-0310-8789-dd5450dbe970
* ticket: newSam Hartman2011-11-232-38/+2
| | | | | | | | | | | | | | | | | subject: FAST PKINIT target_version: 1.10 tags: pullup Per RFC 6113 fast should use the inner request body for the pkinit checksum. We did that on the KDC; now do so on the client. Remove code that explicitly blocked pkinit under FAST. Also, use the reply key *before* the strengthen key is applied when verifying the PADATA_PKINIT_KX. Add FAST pkinit test. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25486 dc483132-0cff-0310-8789-dd5450dbe970
* Clean up client-side preauth error data handlingGreg Hudson2011-11-211-61/+52
| | | | | | | | | | | | | | | | | | | | | | | | Change the clpreauth tryagain method to accept a list of pa-data, taken either from the FAST response or from decoding the e_data as either pa-data or typed-data. Also change the in_padata argument to contain just the type of the request padata rather than the whole element, since modules generally shouldn't care about the contents of their request padata (or they can remember it). In krb5int_fast_process_error, no longer re-encode FAST pa-data as typed-data for the inner error e_data, but decode traditional error e_data for all error types, and try both pa-data and typed-data encoding. In PKINIT, try all elements of the new pa-data list, since it may contain FAST elements as well as the actual PKINIT array. (Fixes an outstanding bug in FAST PKINIT.) ticket: 7023 target_version: 1.10 tags: pullup git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25483 dc483132-0cff-0310-8789-dd5450dbe970
* Simplify and fix kdcpreauth request_body callbackGreg Hudson2011-11-141-12/+1
| | | | | | | | | | | | | | | | | | | Alter the contract for the kdcpreauth request_body callback so that it returns an alias to the encoded body instead of a fresh copy. At the beginning of AS request processing, save a copy of the encoded request body, or the encoded inner request body for FAST requests. Previously the request_body callback would re-encode the request structure, which in some cases has been modified by the AS request code. No kdcpreauth modules currently use the request_body callback, but PKINIT will need to start using it in order to handle FAST requests correctly. ticket: 7017 target_version: 1.10 tags: pullup git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25473 dc483132-0cff-0310-8789-dd5450dbe970
* Fix warnings and version check for NSS pkinitGreg Hudson2011-11-071-3/+3
| | | | | | | | | | From nalin@redhat.com. ticket: 6999 target_version: 1.10 tags: pullup git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25445 dc483132-0cff-0310-8789-dd5450dbe970
* Get rid of fake-installGreg Hudson2011-11-042-2/+2
| | | | | | | | | Instead, use $(BUILDTOP)/plugins as the plugin base for tests. For each real plugin module, create a link in the parent directory if we're doing a shared-library build--so built KDB modules can be found in plugins/kdb, preauth modules in plugins/preauth, etc.. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25436 dc483132-0cff-0310-8789-dd5450dbe970
* Make reindentTom Yu2011-10-174-329/+338
| | | | | | | Also fix pkinit_crypto_nss.c struct initializers and add parens to a ternary operator in do_as_req.c for better indentation. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25362 dc483132-0cff-0310-8789-dd5450dbe970
* Hide gak_fct interface and arguments in clpreauthGreg Hudson2011-10-153-51/+13
| | | | | | | | | | | | | | | | | | | | | | Remove the gak_fct, gak_data, salt, s2kparams, and as_key arguments of krb5_clpreauth_process_fn and krb5_clpreauth_tryagain_fn. To replace them, add two callbacks: one which gets the AS key using the previously selected etype-info2 information, and a second which lets the module replace the AS key with one it has computed. This changes limits module flexibility in a few ways. Modules cannot check whether the AS key was already obtained before asking for it, and they cannot use the etype-info2 salt and s2kparams for purposes other than getting the password-based AS key. It is believed that of existing preauth mechanisms, only SAM-2 preauth needs more flexibility than the new interfaces provide, and as an internal legacy mechanism it can cheat. Future mechanisms should be okay since the current IETF philosophy is that etype-info2 information should not be used for other purposes. ticket: 6976 git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25351 dc483132-0cff-0310-8789-dd5450dbe970
* Make kdcpreauth edata method respond via callbackGreg Hudson2011-10-153-17/+30
| | | | | | From npmccallum@redhat.com with changes. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25348 dc483132-0cff-0310-8789-dd5450dbe970
* Add PKINIT NSS supportGreg Hudson2011-10-135-5/+5323
| | | | | | | | | Add an implementation of PKINIT using NSS instead of OpenSSL, from nalin@redhat.com. ticket: 6975 git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25327 dc483132-0cff-0310-8789-dd5450dbe970
* Ditch fast_factor.h since it contains only stubsGreg Hudson2011-10-063-13/+5
| | | | | | | | Leave a comment behind where we called fast_set_kdc_verified(). Remove the call to fast_kdc_replace_reply_key() since it's wrong (encrypted challenge doesn't replace the reply key in that sense). git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25317 dc483132-0cff-0310-8789-dd5450dbe970
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