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* genkey.c: Store the secret part and return the public part.
This commit is contained in:
Werner Koch
parent
3b8cf6e497
commit
6fd5b6d5ed
@ -1,3 +1,21 @@
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2002-01-07 Werner Koch <wk@gnupg.org>
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* genkey.c: Store the secret part and return the public part.
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2002-01-03 Werner Koch <wk@gnupg.org>
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* command.c (cmd_get_passphrase): New.
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(cmd_clear_passphrase): New.
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* query.c (agent_get_passphrase): New.
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2002-01-02 Werner Koch <wk@gnupg.org>
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* genkey.c: New.
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* command.c (cmd_genkey): New.
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* command.c (rc_to_assuan_status): Removed and changed all callers
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to use map_to_assuan_status.
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2001-12-19 Werner Koch <wk@gnupg.org>
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* keyformat.txt: New.
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@ -50,3 +68,13 @@ Fri Aug 18 14:27:14 CEST 2000 Werner Koch <wk@openit.de>
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* gpg-agent.c: New.
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* Makefile.am: New.
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Copyright 2001, 2002 Free Software Foundation, Inc.
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This file is free software; as a special exception the author gives
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unlimited permission to copy and/or distribute it, with or without
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modifications, as long as this notice is preserved.
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This file is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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@ -30,7 +30,8 @@ gpg_agent_SOURCES = \
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trans.c \
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findkey.c \
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pksign.c \
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pkdecrypt.c
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pkdecrypt.c \
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genkey.c
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gpg_agent_LDADD = ../jnlib/libjnlib.a ../assuan/libassuan.a \
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../common/libcommon.a $(LIBGCRYPT_LIBS)
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@ -94,6 +94,9 @@ GCRY_SEXP agent_key_from_file (const unsigned char *grip);
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/*-- query.c --*/
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int agent_askpin (const char *desc_text, struct pin_entry_info_s *pininfo);
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int agent_get_passphrase (char **retpass,
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const char *desc, const char *prompt,
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const char *errtext);
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/*-- pksign.c --*/
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int agent_pksign (CTRL ctrl, FILE *outfp);
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@ -102,5 +105,10 @@ int agent_pksign (CTRL ctrl, FILE *outfp);
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int agent_pkdecrypt (CTRL ctrl, const char *ciphertext, size_t ciphertextlen,
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FILE *outfp);
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/*-- genkey.c --*/
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int agent_genkey (CTRL ctrl,
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const char *keyparam, size_t keyparmlen, FILE *outfp);
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#endif /*AGENT_H*/
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141
agent/command.c
141
agent/command.c
@ -1,5 +1,5 @@
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/* command.c - gpg-agent command handler
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* Copyright (C) 2001 Free Software Foundation, Inc.
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* Copyright (C) 2001, 2002 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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@ -34,7 +34,8 @@
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/* maximum allowed size of the inquired ciphertext */
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#define MAXLEN_CIPHERTEXT 4096
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/* maximum allowed size of the key parameters */
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#define MAXLEN_KEYPARAM 1024
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#define set_error(e,t) assuan_set_error (ctx, ASSUAN_ ## e, (t))
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@ -50,50 +51,6 @@ struct server_local_s {
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};
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/* Map GNUPG_xxx error codes to Assuan status codes
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FIXME: duplicated from ../sm/server.c */
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static int
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rc_to_assuan_status (int rc)
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{
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switch (rc)
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{
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case 0: break;
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case GNUPG_Bad_Certificate: rc = ASSUAN_Bad_Certificate; break;
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case GNUPG_Bad_Certificate_Path: rc = ASSUAN_Bad_Certificate_Path; break;
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case GNUPG_Missing_Certificate: rc = ASSUAN_Missing_Certificate; break;
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case GNUPG_No_Data: rc = ASSUAN_No_Data_Available; break;
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case GNUPG_Bad_Signature: rc = ASSUAN_Bad_Signature; break;
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case GNUPG_Not_Implemented: rc = ASSUAN_Not_Implemented; break;
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case GNUPG_No_Agent: rc = ASSUAN_No_Agent; break;
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case GNUPG_Agent_Error: rc = ASSUAN_Agent_Error; break;
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case GNUPG_No_Public_Key: rc = ASSUAN_No_Public_Key; break;
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case GNUPG_No_Secret_Key: rc = ASSUAN_No_Secret_Key; break;
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case GNUPG_Invalid_Data: rc = ASSUAN_Invalid_Data; break;
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case GNUPG_Bad_PIN:
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case GNUPG_Bad_Passphrase:
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rc = ASSUAN_No_Secret_Key;
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break;
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case GNUPG_Read_Error:
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case GNUPG_Write_Error:
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case GNUPG_IO_Error:
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rc = ASSUAN_Server_IO_Error;
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break;
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case GNUPG_Out_Of_Core:
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case GNUPG_Resource_Limit:
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rc = ASSUAN_Server_Resource_Problem;
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break;
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case GNUPG_Bug:
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case GNUPG_Internal_Error:
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rc = ASSUAN_Server_Bug;
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break;
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default:
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rc = ASSUAN_Server_Fault;
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break;
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}
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return rc;
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}
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@ -193,7 +150,7 @@ cmd_pksign (ASSUAN_CONTEXT ctx, char *line)
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CTRL ctrl = assuan_get_pointer (ctx);
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rc = agent_pksign (ctrl, assuan_get_data_fp (ctx));
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return rc_to_assuan_status (rc);
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return map_to_assuan_status (rc);
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}
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/* PKDECRYPT <options>
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@ -216,7 +173,92 @@ cmd_pkdecrypt (ASSUAN_CONTEXT ctx, char *line)
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rc = agent_pkdecrypt (ctrl, value, valuelen, assuan_get_data_fp (ctx));
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xfree (value);
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return rc_to_assuan_status (rc);
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return map_to_assuan_status (rc);
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}
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/* GENKEY
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Generate a new key, store the secret part and return the public
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part. Here is an example transaction:
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C: GENKEY
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S: INQUIRE KEYPARM
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C: D (genkey (rsa (nbits 1024)))
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C: END
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S: D (public-key
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S: D (rsa (n 326487324683264) (e 10001)))
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S OK key created
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*/
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static int
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cmd_genkey (ASSUAN_CONTEXT ctx, char *line)
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{
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CTRL ctrl = assuan_get_pointer (ctx);
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int rc;
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char *value;
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size_t valuelen;
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/* First inquire the parameters */
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rc = assuan_inquire (ctx, "KEYPARAM", &value, &valuelen, MAXLEN_KEYPARAM);
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if (rc)
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return rc;
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rc = agent_genkey (ctrl, value, valuelen, assuan_get_data_fp (ctx));
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xfree (value);
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return map_to_assuan_status (rc);
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}
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/* GET_PASSPHRASE <cache_id> [<error_message> <prompt> <description>]
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This function is usually used to ask for a passphrase to be used
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for conventional encryption, but may aslo be used by programs which
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need specal handling of passphrases. This command uses a syntax
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which helps clients to use the agent with minimum effort. The
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agent either returns with an error or with a OK followed by the hex
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encoded passphrase. Note that the length of the strings is
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implicitly limited by the maximum length of a command.
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*/
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static int
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cmd_get_passphrase (ASSUAN_CONTEXT ctx, char *line)
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{
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int rc;
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char *response;
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char *desc, *prompt, *errtext;
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/* FIXME: Parse that stuff */
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desc = "We need a passphrase";
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prompt = NULL;
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errtext = "try again";
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rc = agent_get_passphrase (&response, desc, prompt, errtext);
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if (!rc)
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{
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rc = assuan_set_okay_line (ctx, response);
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xfree (response);
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}
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return map_to_assuan_status (rc);
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}
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/* CLEAR_PASSPHRASE <cache_id>
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may be used to invalidate the cache entry for a passphrase. The
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function returns with OK even when ther eis no cached passphrase.
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*/
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static int
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cmd_clear_passphrase (ASSUAN_CONTEXT ctx, char *line)
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{
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int rc;
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/* fixme: no caching yet. so return with OK */
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rc = 0;
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return map_to_assuan_status (rc);
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}
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@ -235,6 +277,9 @@ register_commands (ASSUAN_CONTEXT ctx)
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{ "SETHASH", 0, cmd_sethash },
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{ "PKSIGN", 0, cmd_pksign },
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{ "PKDECRYPT", 0, cmd_pkdecrypt },
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{ "GENKEY", 0, cmd_genkey },
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{ "GET_PASSPHRASE",0, cmd_get_passphrase },
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{ "CLEAR_PASSPHRASE",0, cmd_clear_passphrase },
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{ "", ASSUAN_CMD_INPUT, NULL },
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{ "", ASSUAN_CMD_OUTPUT, NULL },
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{ NULL }
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189
agent/genkey.c
Normal file
189
agent/genkey.c
Normal file
@ -0,0 +1,189 @@
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/* pksign.c - Generate a keypair
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* Copyright (C) 2002 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <assert.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include "agent.h"
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static int
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store_key (GCRY_SEXP private)
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{
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int i;
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char *fname;
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FILE *fp;
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char *buf;
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size_t len;
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unsigned char grip[20];
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char hexgrip[41];
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if ( !gcry_pk_get_keygrip (private, grip) )
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{
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log_error ("can't calculate keygrip\n");
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return seterr (General_Error);
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}
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for (i=0; i < 20; i++)
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sprintf (hexgrip+2*i, "%02X", grip[i]);
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hexgrip[40] = 0;
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fname = make_filename (opt.homedir, "private-keys-v1.d", hexgrip, NULL);
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if (!access (fname, F_OK))
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{
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log_error ("secret key file `%s' already exists - very strange\n",
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fname);
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xfree (fname);
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return seterr (General_Error);
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}
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fp = fopen (fname, "wbx");
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if (!fp)
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{
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log_error ("can't create `%s': %s\n", fname, strerror (errno));
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xfree (fname);
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return seterr (File_Create_Error);
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}
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len = gcry_sexp_sprint (private, GCRYSEXP_FMT_CANON, NULL, 0);
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assert (len);
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buf = gcry_malloc_secure (len);
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if (!buf)
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{
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fclose (fp);
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remove (fname);
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xfree (fname);
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return seterr (Out_Of_Core);
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}
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len = gcry_sexp_sprint (private, GCRYSEXP_FMT_CANON, buf, len);
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assert (len);
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if (fwrite (buf, len, 1, fp) != 1)
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{
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log_error ("error writing `%s': %s\n", fname, strerror (errno));
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fclose (fp);
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remove (fname);
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xfree (fname);
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xfree (buf);
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return seterr (File_Create_Error);
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}
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if ( fclose (fp) )
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{
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log_error ("error closing `%s': %s\n", fname, strerror (errno));
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remove (fname);
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xfree (fname);
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xfree (buf);
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return seterr (File_Create_Error);
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}
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xfree (fname);
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xfree (buf);
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return 0;
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}
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/* Generate a new keypair according to the parameters given in
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KEYPARAM */
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int
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agent_genkey (CTRL ctrl, const char *keyparam, size_t keyparamlen,
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FILE *outfp)
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{
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GCRY_SEXP s_keyparam, s_key, s_private, s_public;
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int rc;
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size_t len;
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char *buf;
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rc = gcry_sexp_sscan (&s_keyparam, NULL, keyparam, keyparamlen);
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if (rc)
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{
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log_error ("failed to convert keyparam: %s\n", gcry_strerror (rc));
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return seterr (Invalid_Data);
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}
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/* fixme: Get the passphrase now, cause key generation may take a while */
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rc = gcry_pk_genkey (&s_key, s_keyparam );
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gcry_sexp_release (s_keyparam);
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if (rc)
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{
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log_error ("key generation failed: %s\n", gcry_strerror (rc));
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return map_gcry_err (rc);
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}
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/* break out the parts */
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s_private = gcry_sexp_find_token (s_key, "private-key", 0);
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if (!s_private)
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{
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log_error ("key generation failed: invalid return value\n");
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gcry_sexp_release (s_key);
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return seterr (Invalid_Data);
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}
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s_public = gcry_sexp_find_token (s_key, "public-key", 0);
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if (!s_public)
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{
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log_error ("key generation failed: invalid return value\n");
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gcry_sexp_release (s_private);
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gcry_sexp_release (s_key);
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return seterr (Invalid_Data);
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}
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gcry_sexp_release (s_key); s_key = NULL;
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/* store the secret key */
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log_debug ("storing private key\n");
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rc = store_key (s_private);
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gcry_sexp_release (s_private);
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if (rc)
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{
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gcry_sexp_release (s_public);
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return rc;
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}
|
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/* return the public key */
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log_debug ("returning public key\n");
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len = gcry_sexp_sprint (s_public, GCRYSEXP_FMT_CANON, NULL, 0);
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assert (len);
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buf = xmalloc (len);
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if (!buf)
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{
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gcry_sexp_release (s_private);
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gcry_sexp_release (s_public);
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return seterr (Out_Of_Core);
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}
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len = gcry_sexp_sprint (s_public, GCRYSEXP_FMT_CANON, buf, len);
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assert (len);
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if (fwrite (buf, len, 1, outfp) != 1)
|
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{
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log_error ("error writing public key: %s\n", strerror (errno));
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gcry_sexp_release (s_private);
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gcry_sexp_release (s_public);
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xfree (buf);
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return seterr (File_Create_Error);
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}
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gcry_sexp_release (s_public);
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xfree (buf);
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||||
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return 0;
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||||
}
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@ -5,8 +5,8 @@ keyformat.txt (wk 2001-12-18)
|
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Some notes on the format of the secret keys used with gpg-agent.
|
||||
|
||||
|
||||
The secret[1] keys are store one per file in a directory below
|
||||
the .gnupg homedirectory. This directory is named
|
||||
The secret keys[1] are stored on a per file basis in a directory below
|
||||
the .gnupg home directory. This directory is named
|
||||
|
||||
private-keys-v1.d
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|
||||
@ -14,7 +14,7 @@ and should have permissions 700.
|
||||
|
||||
The secret keys are stored in files with a name matching the
|
||||
hexadecimal representation of the keygrip[2]. The content of the file
|
||||
is an S-Expression like tyhe ones used with Libgcrypt. Here is the
|
||||
is an S-Expression like the ones used with Libgcrypt. Here is an
|
||||
example of an unprotected file:
|
||||
|
||||
(private-key
|
||||
@ -33,7 +33,8 @@ accepted by gpg-agent with the configuration option:
|
||||
--allow-non-canonical-key-format.
|
||||
|
||||
The regular way to represent the keys is in canonical representation
|
||||
with the additional requirement of an extra object around it[3]:
|
||||
with the additional requirement of an extra object container around
|
||||
it[3]:
|
||||
|
||||
(oid.1.3.6.1.4.1.11591.2.2.2
|
||||
(keyinfo human_readable_information_to_decribe_this_key)
|
||||
@ -74,8 +75,8 @@ Defined protection methods are:
|
||||
1.3.6.1.4.1.gnu(11591).aegypten(2)
|
||||
.algorithms(1).keyprotection(1).s2k3-sha1-aes-cbc(1)
|
||||
|
||||
This uses AES in CBS mode for encryption, SHA-1 fro integrity
|
||||
protecion and the String to Key algorithm 3 from OpenPGP (rfc2440).
|
||||
This uses AES in CBC mode for encryption, SHA-1 for integrity
|
||||
protection and the String to Key algorithm 3 from OpenPGP (rfc2440).
|
||||
|
||||
Example:
|
||||
|
||||
@ -94,6 +95,9 @@ representation) after decryption:
|
||||
(u #304559a..[some bytes not shown]..9b#)
|
||||
)
|
||||
|
||||
For padding reasons, random bytes are appended to this list - they can
|
||||
easily be stripped by looking for the end of the list.
|
||||
|
||||
The first element is the SHA-1 hash calculated on the concatenation of the
|
||||
public key and secret key parameter lists: i.e one has to hash the
|
||||
concatenatiohn of these 6 canonical encoded lists for RSA, including
|
||||
@ -112,13 +116,7 @@ the stored one - If they don't match the integrity of the key is not
|
||||
given.
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
TODO: write a more elaborated version.
|
||||
|
||||
|
||||
|
||||
|
||||
@ -215,6 +215,82 @@ agent_askpin (const char *desc_text,
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* Ask for the passphrase using the supplied arguments. The
|
||||
passphrase is returned in RETPASS as an hex encoded string to be
|
||||
freed by the caller */
|
||||
int
|
||||
agent_get_passphrase (char **retpass, const char *desc, const char *prompt,
|
||||
const char *errtext)
|
||||
{
|
||||
|
||||
int rc;
|
||||
char line[ASSUAN_LINELENGTH];
|
||||
struct entry_parm_s parm;
|
||||
unsigned char *p, *hexstring;
|
||||
int i;
|
||||
|
||||
*retpass = NULL;
|
||||
if (opt.batch)
|
||||
return GNUPG_Bad_Passphrase;
|
||||
|
||||
rc = start_pinentry ();
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
if (desc)
|
||||
snprintf (line, DIM(line)-1, "SETDESC %s", desc);
|
||||
else
|
||||
snprintf (line, DIM(line)-1, "RESET");
|
||||
line[DIM(line)-1] = 0;
|
||||
rc = assuan_transact (entry_ctx, line, NULL, NULL, NULL, NULL);
|
||||
if (rc)
|
||||
return map_assuan_err (rc);
|
||||
|
||||
snprintf (line, DIM(line)-1, "SETPROMPT %s", prompt? prompt : "Passphrase");
|
||||
line[DIM(line)-1] = 0;
|
||||
rc = assuan_transact (entry_ctx, line, NULL, NULL, NULL, NULL);
|
||||
if (rc)
|
||||
return map_assuan_err (rc);
|
||||
|
||||
if (errtext)
|
||||
{
|
||||
snprintf (line, DIM(line)-1, "SETERROR %s", errtext);
|
||||
line[DIM(line)-1] = 0;
|
||||
rc = assuan_transact (entry_ctx, line, NULL, NULL, NULL, NULL);
|
||||
if (rc)
|
||||
return map_assuan_err (rc);
|
||||
}
|
||||
|
||||
memset (&parm, 0, sizeof parm);
|
||||
parm.size = ASSUAN_LINELENGTH/2 - 5;
|
||||
parm.buffer = gcry_malloc_secure (parm.size+10);
|
||||
if (!parm.buffer)
|
||||
return seterr (Out_Of_Core);
|
||||
|
||||
rc = assuan_transact (entry_ctx, "GETPIN", getpin_cb, &parm, NULL, NULL);
|
||||
if (rc)
|
||||
{
|
||||
xfree (parm.buffer);
|
||||
return map_assuan_err (rc);
|
||||
}
|
||||
|
||||
hexstring = gcry_malloc_secure (strlen (parm.buffer)*2+1);
|
||||
if (!hexstring)
|
||||
{
|
||||
xfree (parm.buffer);
|
||||
return seterr (Out_Of_Core);
|
||||
}
|
||||
|
||||
for (i=0, p=parm.buffer; *p; p++, i += 2)
|
||||
sprintf (hexstring+i, "%02X", *p);
|
||||
|
||||
xfree (parm.buffer);
|
||||
*retpass = hexstring;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user