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* core: Implement context flag "override-session-key".Werner Koch2016-11-151-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * src/gpgme.c (gpgme_set_ctx_flag): Add flags "export-session-key" and "override-session-key". (gpgme_get_ctx_flag): Ditto. (gpgme_set_export_session_keys): Remove. (gpgme_get_export_session_keys): Remove. * src/gpgme.def, src/libgpgme.vers: Remove them. * src/context.h (struct gpgme_context): Add field override_session_key. * src/decrypt-verify.c (decrypt_verify_start): Pass override_session_key value to the engine. * src/decrypt.c (decrypt_start): Ditto. * src/engine.c (_gpgme_engine_op_decrypt): Ditto. (_gpgme_engine_op_decrypt_verify): Ditto. * src/engine-backend.h (struct engine_ops): Extend DECRYPT and DECRYPT_VERIFY_START with override_session_key. * src/engine-uiserver.c (_uiserver_decrypt): Add stub arg override_session_key. (uiserver_decrypt): Ditto. (uiserver_decrypt_verify): Ditto. * src/engine-gpgsm.c (gpgsm_decrypt): Ditto. * src/engine-gpg.c (gpg_decrypt): Add arg override_session_key and set corresponding gpg option. * tests/run-decrypt.c (print_result): Print the session key if available. (main): Add options --export-session-key and --override-session-key. -- To keep the number of context manipulation functions at bay, this patches removes the just added gpgme_set_export_session_keys and gpgme_get_export_session_keys by flags for the generic context function. The patch also implements the --override-session-key feature. GnuPG-bug-id: 2754 Signed-off-by: Werner Koch <[email protected]>
* core: Enable extraction of session keys.Daniel Kahn Gillmor2016-11-151-1/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * src/gpgme.c (gpgme_set_export_session_keys): New function. (gpgme_get_export_session_keys): New function. * src/gpgme.h.in (struct _gpgme_op_decrypt_result): Add session_key member. (gpgme_{set,get}_export_session_keys): Declare new functions. * src/libgpgme.vers, src/gpgme.def: Export new functions in shared object. * src/engine.h: (_gpgme_engine_op_decrypt) Add export_session_key parameter. (_gpgme_engine_op_decrypt_verify): Add export_session_key parameter. * src/engine-backend.h: (struct engine_ops): Change function pointer declarations to match. * src/context.h (struct gpgme_context): Add export_session_keys member. * src/decrypt.c (release_op_data): Free result.session_key. (_gpgme_decrypt_status_handler): Store a copy of the exported session key. (decrypt_start): Pass export_session_keys from the context. * src/decrypt-verify.c (decrypt_verify_start): Pass export_session_keys from context. * src/engine.c (_gpgme_engine_op_decrypt): Pass through export_session_key flag. (_gpgme_engine_op_decrypt_verify): Pass through export_session_key flag. * src/engine-gpg.c (gpg_decrypt): If export_session_key is set, add --export-session-key to argument list. * src/engine-gpgsm.c (gpgsm_decrypt): Ignore export_session_key for now, since gpgsm offers no such mechanism. * src/engine-uiserver.c (_uiserver_decrypt): If export_session_key is set, add --export-session-key flag to cmd. * doc/gpgme.texi: Document new functions and session_key member of decrypt_result_t. * doc/uiserver.texi: Add --export-session-key flag to DECRYPT command. -- gpg(1) documents session key export as useful for key escrow, and is rightly dubious of that use case. However, session key export is also useful in other use cases. Two examples from MUA development (where this functionality would be specifically useful to me right now): * If the MUA stores a local copy of the session key upon decrypting the message, it can re-decrypt the message without expensive asymmetric operations. When rendering a thread with dozens of encrypted messages, this can represent a significant speedup. * A user may have expired encryption-capable secret key material, along with many messages encrypted to that material. If she stores the session keys for those messages she wants to keep, she can destroy her secret key material and make any messages she has deleted completely unrecoverable, even to an attacker who gets her remaining secret keys in the future. This patchset makes a two specific implementation decisions that could have gone in different ways. I welcome feedback on preferred outcomes. 0) session key representation: we currently represent the session key as an opaque textual string, rather than trying to provide any sort of in-memory structure. While it wouldn't be hard to parse the data produced by gpg's --export-session-key, I chose to use the opaque string rather than lock in a particular data format. 1) API/ABI: i've added a member to gpgme_op_decrypt_result_t. This has the potential to cause an out-of-bound memory access if someone uses code compiled against the newer verision, but linked at runtime against an older version. I've attempted to limit that risk by documenting that users must verify gpgme_get_export_session_keys() before accessing this new struct member -- this means that code expecting this capability will require the symbol at link-time, and will refuse to link against older versions. Another approach to solving this problem would be to avoid modifying gpgme_op_decrypt_result_t, and to introduce instead a new function gpgme_op_session_key(), which could be called in the same places as gpgme_op_decrypt_result(). Depending on the representation of the session key, this might introduce new memory-management burdens on the user of the library, and the session key is certainly part of a decryption result, so it seemed simpler to go with what i have here. If anyone has strong preferences that these choices should be solved in a different way, i'm happy to hear them. Additionally, I note that i'm also still pretty unclear about how the "UI Server" fits into this whole ecosystem. In particular, I don't know whether it's kosher to just add an --export-session-key flag to the DECRYPT operation without actually having implemented it anywhere, but i don't see where i would actually implement it either :/ If this patch (or some variant) is adopted, i will supply another patch that permits offering a session key during decryption (e.g. "gpg --override-session-key"), but I wanted to get these implementation choices ironed out first. Gnupg-Bug-Id: 2754 Signed-off-by: Daniel Kahn Gillmor <[email protected]> On the concern of adding a new field to a structure: It may not be clearly documented but we don't expect that a user ever allocates such a structure - those result structure may only be created bu gpgme and are read-only for the user. Adding a new member constitutes a compatible ABI change and thus an older SO may not be used by code compiled with a header for the newer API. Unless someone tinkers with the build system, this should never happen. We have added new fields to result structure may times and I can't remember any problems. - wk
* api: Add new function gpgme_set_ctx_flag.Werner Koch2016-05-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * src/gpgme.h.in (gpgme_set_ctx_flag): New prototype. * src/gpgme.c (gpgme_set_ctx_flag): New. * src/gpgme.def, src/libgpgme.vers: Add new function. * src/context.h (struct gpgme_context): Add FULL_STATUS. * src/decrypt.c (_gpgme_decrypt_status_handler): Do not call the status callback if FULL_STATUS is set. * src/genkey.c (genkey_status_handler): Ditto. * src/passphrase.c (_gpgme_passphrase_status_handler): Ditto. * src/sign.c (_gpgme_sign_status_handler): Ditto. * src/engine-backend.h (struct engine_ops): Add SET_STATUS_CB and add adjust all definitions of that variable. * src/engine.c (_gpgme_engine_set_status_cb): New. * src/op-support.c (_gpgme_op_reset): Call this function. * src/engine-gpg.c (struct engine_gpg): Add fields MON_CB and MON_CB_VALUE. (gpg_set_status_cb): New. (_gpgme_engine_ops_gpg): Register that function. (read_status): Call the monitor callback. * src/engine-gpgsm.c (struct engine_gpgsm): Add fields MON_CB and MON_CB_VALUE. (_gpgme_engine_ops_gpgsm): Register that function. (gpgsm_assuan_simple_command): Change first arg to be an engine context and adjust call callers. Call the monitor callback. * src/engine-uiserver.c (struct engine_uiserver): Add fields MON_CB and MON_CB_VALUE. (_gpgme_engine_ops_uiserver): Register that function. (uiserver_assuan_simple_command): Change first arg to be an engine context and adjust call callers. Call the monitor callback. * tests/run-verify.c (status_cb): New. (print_result): Print algo names. (main): Add option --status. -- This new feature is mainly intended for bug tracking. Having access to the raw status lines might also be useful for applications, though. Signed-off-by: Werner Koch <[email protected]>
* Improve error return by checking the FAILURE status.Werner Koch2015-08-251-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | * src/gpgme.h.in (GPGME_STATUS_FAILURE): New. * src/status-table.c (FAILURE): New. * src/op-support.c (_gpgme_parse_failure): New. * src/passphrase.c (_gpgme_passphrase_status_handler): Forward FAILURE status line to the status callback. * src/decrypt.c (op_data_t): Add field failure_code. (_gpgme_decrypt_status_handler): Parse that code and act upon it on EOF. * src/encrypt.c (op_data_t): Add field failure_code. (_gpgme_encrypt_status_handler): Parse that code and act upon it on EOF. * src/genkey.c (op_data_t): Add field failure_code. (genkey_status_handler): Parse that code and act upon it on EOF. * src/passwd.c (op_data_t): Add field failure_code. (passwd_status_handler): Parse that code and act upon it on EOF. * src/sign.c (op_data_t): Add field failure_code. (_gpgme_sign_status_handler): Parse that code and act upon it on EOF. * src/verify.c (op_data_t): Add field failure_code. (_gpgme_verify_status_handler): Parse that code and act upon it on EOF. -- This requires GnuPG 2.1.8 to actually make a difference. Signed-off-by: Werner Koch <[email protected]>
* Parse the INQUIRE_MAXLEN status message.Ben Kibbey2015-08-151-0/+10
| | | | | | | | | | | | * src/gpgme.h.in: (gpgme_status_code_t): Add INQUIRE_MAXLEN. * src/status-table.c (status_table_s): Ditto. * src/genkey.c (genkey_status_handler): Parse INQUIRE_MAXLEN. * src/decrypt.c (_gpgme_decrypt_status_handler): Ditto. * src/sign.c (_gpgme_sign_status_handler): Ditto. This status message informs the client of the maximum length of an inquired line. It is sent from gpg and forwarded to the client via gpgme_status_cb_t.
* Map public key algos returned by gpg to gpgme values.Werner Koch2014-05-081-3/+3
| | | | | | | | | | | | | | | | | | | * src/conversion.c (_gpgme_map_pk_algo): New. * src/decrypt.c (parse_enc_to): Add arg PROTOCOL and map pubkey algo. (_gpgme_decrypt_status_handler): Map pubkey algo. * src/keylist.c (keylist_colon_handler): Map pubkey algo. * src/sign.c (parse_sig_created): Add arg PROTOCOL and map pubkey algo. * src/verify.c (parse_new_sig): Ditto. (parse_valid_sig): Ditto. * src/gpgme.h.in (GPGME_PK_ECC): New. (GPGME_MD_SHA224): New. * src/gpgme.c (gpgme_pubkey_algo_name): Add GPGME_PK_ECC case. (gpgme_hash_algo_name): Add GPGME_MD_SHA224. -- This affects only the not yet released ECC code of GnuPG 2.1.
* Trace the use of GPG_ERR_INV_ENGINE.Werner Koch2012-10-191-3/+3
| | | | | | | | | | | | | | * src/debug.h: Include "gpgme.h" (_gpgme_trace_gpgme_error): New. (trace_gpg_error): New macro. Use it in all files where we return GPG_ERR_INV_ENGINE; also "include debug.h" as needed. -- This is a pretty common error code but often it is hard to figure out the actual cause. With debug level 4 we now print the file name and line number where this error code is generated by gpgme. Along with the git revision printed in the first log lines, this should give us an easier way to track down the problems related to this error code.
* Remove all trailing whitespace from source filesWerner Koch2012-09-251-2/+2
| | | | | -- Command used: sed -i 's,[ \t]*$,,' FILE
* Rework status table to be less dynamically generated.Marcus Brinkmann2012-02-141-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | * src/Makefile.am (EXTRA_DIST): Remove mkstatus. (BUILT_SOURCE, MOSTLYCLEANFILES): Remove. (main_sources): Remove status-table.h, extra-stati.h. Add status-table.c. (status-table.h): Remove rules for built source. * src/decrypt.c: Don't include extra-stati.h. * src/engine-gpg.c: Don't include status-table.h. (status_cmp): Remove function. (read_status): Use _gpgme_parse_status. * src/engine-gpgsm.c: Don't include status-table.h. (status_cmp, parse_status): Remove function. (gpgsm_assuan_simple_command, status_handler): Use _gpgme_parse_status. * src/engine-uiserver.c: Don't include status-table.h. (status_cmp, parse_status): Remove function. (uiserver_assuan_simple_command, status_handler): Use _gpgme_parse_status. * src/gpgme.h.in (gpgme_status_code_t): Add GPGME_STATUS_DECRYPTION_INFO. * src/util.h (_gpgme_status_init,_gpgme_parse_status): New declaration. * src/status-table.c: New file. * src/extra-stati.h, src/mkstatus: Files removed. * version.c (do_subsystem_inits): Call _gpgme_status_init.
* Check context pointers for null pointer on entry points.Marcus Brinkmann2011-05-261-0/+8
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* Add support for non-API GnuPG status codes.Werner Koch2011-02-031-5/+11
| | | | | | | As an example stub code for DECRYTPION_INFO has been added. Note that the status codes in gpgme.h do only make sense for the edit interactor interface and thus certain codes don't need to be part of the public interface.
* 2010-05-06 Marcus Brinkmann <[email protected]>Marcus Brinkmann2010-05-061-3/+3
| | | | | | | | | | | | | | | | | | | * configure.ac: Require libgpg-error 1.8. src/ 2010-05-06 Marcus Brinkmann <[email protected]> * sign.c, data-user.c, conversion.c, debug.c, verify.c, data.c, decrypt.c, delete.c, assuan-support.c, import.c, engine-gpgsm.c, data-mem.c, op-support.c, w32-io.c, w32-util.c, data-compat.c: Use gpg_error_from_syserror instead gpg_error_from_errno, and use gpg_err_set_errno to set error number. * setenv.c: Include <gpg-error.h> and define __set_errno to use gpg_err_set_errno. * gpgme-tool.c (ARGP_ERR_UNKNOWN): Define to EDEADLOCK (which is mapped in Windows CE) instead of E2BIG (which is not). (gt_import_keys): Initialize err.
* 2009-11-05 Marcus Brinkmann <[email protected]>Marcus Brinkmann2009-11-051-1/+4
| | | | | | | | | | | | | | | | | | | | | | * decrypt.c (gpgme_op_decrypt_start): Fix use of debug macro. * decrypt-verify.c (gpgme_op_decrypt_verify_start): Likewise. * delete.c (gpgme_op_delete_start): Likewise. * edit.c (gpgme_op_edit_start, gpgme_op_card_edit_start): Likewise. * encrypt.c (gpgme_op_encrypt_start): Likewise. * encrypt-sign.c (gpgme_op_encrypt_sign_start): Likewise. * export.c (gpgme_op_export_start, gpgme_op_export_ext_start) (gpgme_op_export_keys_start, gpgme_op_export_keys): Likewise. * genkey.c (gpgme_op_genkey_start): Likewise. * getauditlog.c (gpgme_op_getauditlog_start): Likewise. * import.c (gpgme_op_import_start, gpgme_op_import_keys_start): Likewise. * opassuan.c (gpgme_op_assuan_transact_start): Likewise. * sign.c (gpgme_op_sign_start): Likewise. * verify.c (gpgme_op_verify_start): Likewise. * vfs-create.c (gpgme_op_vfs_create): Likewise. * vfs-mount.c (gpgme_op_vfs_mount): Likewise.
* 2009-11-02 Marcus Brinkmann <[email protected]>Marcus Brinkmann2009-11-021-1/+0
| | | | | | | | | | * debug.h (_gpgme_debug_buffer): Make TAG argument const const. * debug.c (_gpgme_debug_buffer): Likewise. * gpgme-tool.c (input_notify, output_notify): Adjust type to new assuan interface. * decrypt.c (gpgme_op_decrypt_result): Remove unused variable. * opassuan.c (gpgme_op_assuan_transact): Fix return value.
* 2009-10-27 Marcus Brinkmann <[email protected]>Marcus Brinkmann2009-10-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * edit.c (gpgme_op_edit_start, gpgme_op_edit) (gpgme_op_card_edit_start, gpgme_op_card_edit): Add debug output. * encrypt-sign.c (gpgme_op_encrypt_sign_start) (gpgme_op_encrypt_sign): Likewise. * encrypt.c (gpgme_op_encrypt_start, gpgme_op_encrypt) (gpgme_op_encrypt_result): Likewise. * export.c (gpgme_op_export_start, gpgme_op_export) (gpgme_op_export_ext_start, gpgme_op_export_ext) (gpgme_op_export_keys_start, gpgme_op_export_keys): Likewise. * genkey.c (gpgme_op_genkey_start, gpgme_op_genkey) (gpgme_op_genkey_result): Likewise. * getauditlog.c (gpgme_op_getauditlog_start) (gpgme_op_getauditlog): Likewise. * import.c (gpgme_op_import_result, gpgme_op_import_start) (gpgme_op_import): Likewise. * keylist.c (gpgme_op_keylist_result, keylist_colon_handler) (gpgme_op_keylist_start, gpgme_op_keylist_ext_start) (gpgme_op_keylist_next, gpgme_op_keylist_end, gpgme_get_key): Likewise. * opassuan.c (gpgme_op_assuan_transact_start) (gpgme_op_assuan_transact_ext, gpgme_op_assuan_result) (gpgme_op_assuan_transact): Likewise. * signers.c (gpgme_signers_add, gpgme_signers_clear): Likewise. * trustlist.c (gpgme_op_trustlist_start) (gpgme_op_trustlist_next, gpgme_op_trustlist_end): Likewise. * verify.c (gpgme_op_verify_start, gpgme_op_verify) (gpgme_op_verify_result): Likewise.
* 2009-10-26 Marcus Brinkmann <[email protected]>Marcus Brinkmann2009-10-261-8/+47
| | | | | | | | | | | | | | | | | | | * debug.h (DEBUG_GLOBAL): New debug level. * conversion.c (gnupg_errors, _gpgme_map_gnupg_error): Removed. * data-user.c (gpgme_data_new_from_cbs): Add debug output. * data-fd.c (gpgme_data_new_from_fd): Likewise. * data-stream.c (gpgme_data_new_from_stream): Likewise. * decrypt.c (gpgme_op_decrypt_result, gpgme_op_decrypt_start) (gpgme_op_decrypt): Likewise. * delete.c (gpgme_op_delete_start, gpgme_op_delete): Likewise. * decrypt-verify.c (gpgme_op_decrypt_verify_start) (gpgme_op_decrypt_verify): Likewise. * sign.c (gpgme_op_sign_result): Fix debug message. * data-mem.c (gpgme_data_new): Improve debug output. * verify.c (parse_trust): Use atoi instead of _gpgme_map_gnupg_error. * decrypt.c (_gpgme_decrypt_status_handler): Likewise.
* Fix SIGPIPE ignoring regression.Werner Koch2008-11-181-3/+4
| | | | | Fix unsupported algorithm detection.
* 008-11-03 Marcus Brinkmann <[email protected]>Marcus Brinkmann2008-11-031-0/+348
* configure.ac: Replace gpgme paths with src. * gpgme: Move to ... * src: ... this new directory. assuan/ 2008-11-03 Marcus Brinkmann <[email protected]> * Makefile.am (INCLUDES): Replace gpgme path with src. tests/ 2008-11-03 Marcus Brinkmann <[email protected]> * gpgsm/Makefile.am (INCLUDES, LDADD): Replace gpgme path with src. * gpg/Makefile.am (INCLUDES, LDADD, t_thread1_LDADD): Likewise. * Makefile.am (LDADD): Likewise.