diff --git a/sm/gpgsm.h b/sm/gpgsm.h index 9e4694a64..9c6f0e3d4 100644 --- a/sm/gpgsm.h +++ b/sm/gpgsm.h @@ -1,475 +1,476 @@ /* gpgsm.h - Global definitions for GpgSM * Copyright (C) 2001, 2003, 2004, 2007, 2009, * 2010 Free Software Foundation, Inc. * * This file is part of GnuPG. * * GnuPG is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * GnuPG is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ #ifndef GPGSM_H #define GPGSM_H #ifdef GPG_ERR_SOURCE_DEFAULT #error GPG_ERR_SOURCE_DEFAULT already defined #endif #define GPG_ERR_SOURCE_DEFAULT GPG_ERR_SOURCE_GPGSM #include #include #include "../common/util.h" #include "../common/status.h" #include "../common/audit.h" #include "../common/session-env.h" #include "../common/ksba-io-support.h" #include "../common/compliance.h" #define MAX_DIGEST_LEN 64 struct keyserver_spec { struct keyserver_spec *next; char *host; int port; char *user; char *pass; char *base; unsigned int use_ldaps:1; }; /* A large struct named "opt" to keep global flags. */ EXTERN_UNLESS_MAIN_MODULE struct { unsigned int debug; /* debug flags (DBG_foo_VALUE) */ int verbose; /* verbosity level */ int quiet; /* be as quiet as possible */ int batch; /* run in batch mode, i.e w/o any user interaction */ int answer_yes; /* assume yes on most questions */ int answer_no; /* assume no on most questions */ int dry_run; /* don't change any persistent data */ int no_homedir_creation; const char *config_filename; /* Name of the used config file. */ const char *agent_program; session_env_t session_env; char *lc_ctype; char *lc_messages; int autostart; const char *dirmngr_program; int disable_dirmngr; /* Do not do any dirmngr calls. */ const char *protect_tool_program; char *outfile; /* name of output file */ int with_key_data;/* include raw key in the column delimited output */ int fingerprint; /* list fingerprints in all key listings */ int with_md5_fingerprint; /* Also print an MD5 fingerprint for standard key listings. */ int with_keygrip; /* Option --with-keygrip active. */ int with_key_screening; /* Option --with-key-screening active. */ int pinentry_mode; int request_origin; int armor; /* force base64 armoring (see also ctrl.with_base64) */ int no_armor; /* don't try to figure out whether data is base64 armored*/ const char *p12_charset; /* Use this charset for encoding the pkcs#12 passphrase. */ const char *def_cipher_algoid; /* cipher algorithm to use if nothing else is specified */ int def_compress_algo; /* Ditto for compress algorithm */ int forced_digest_algo; /* User forced hash algorithm. */ int force_ecdh_sha1kdf; /* Only for debugging and testing. */ char *def_recipient; /* userID of the default recipient */ int def_recipient_self; /* The default recipient is the default key */ int no_encrypt_to; /* Ignore all as encrypt to marked recipients. */ char *local_user; /* NULL or argument to -u */ int extra_digest_algo; /* A digest algorithm also used for verification of signatures. */ int always_trust; /* Trust the given keys even if there is no valid certification chain */ int skip_verify; /* do not check signatures on data */ int lock_once; /* Keep lock once they are set */ int ignore_time_conflict; /* Ignore certain time conflicts */ int no_crl_check; /* Don't do a CRL check */ int no_trusted_cert_crl_check; /* Don't run a CRL check for trusted certs. */ int force_crl_refresh; /* Force refreshing the CRL. */ int enable_issuer_based_crl_check; /* Backward compatibility hack. */ int enable_ocsp; /* Default to use OCSP checks. */ char *policy_file; /* full pathname of policy file */ int no_policy_check; /* ignore certificate policies */ int no_chain_validation; /* Bypass all cert chain validity tests */ int ignore_expiration; /* Ignore the notAfter validity checks. */ int auto_issuer_key_retrieve; /* try to retrieve a missing issuer key. */ int qualsig_approval; /* Set to true if this software has officially been approved to create an verify qualified signatures. This is a runtime option in case we want to check the integrity of the software at runtime. */ struct keyserver_spec *keyserver; /* A list of certificate extension OIDs which are ignored so that one can claim that a critical extension has been handled. One OID per string. */ strlist_t ignored_cert_extensions; enum gnupg_compliance_mode compliance; /* Enable creation of authenticode signatures. */ int authenticode; /* A list of extra attributes put into a signed data object. For a * signed each attribute each string has the format: * :s: * and for an unsigned attribute * :u: * The OID is in the usual dotted decimal for. The HEX_OR_FILENAME * is either a list of hex digits or a filename with the DER encoded * value. A filename is detected by the presence of a slash in the * HEX_OR_FILENAME. The actual value needs to be encoded as a SET OF * attribute values. */ strlist_t attributes; } opt; /* Debug values and macros. */ #define DBG_X509_VALUE 1 /* debug x.509 data reading/writing */ #define DBG_MPI_VALUE 2 /* debug mpi details */ #define DBG_CRYPTO_VALUE 4 /* debug low level crypto */ #define DBG_MEMORY_VALUE 32 /* debug memory allocation stuff */ #define DBG_CACHE_VALUE 64 /* debug the caching */ #define DBG_MEMSTAT_VALUE 128 /* show memory statistics */ #define DBG_HASHING_VALUE 512 /* debug hashing operations */ #define DBG_IPC_VALUE 1024 /* debug assuan communication */ #define DBG_CLOCK_VALUE 4096 #define DBG_LOOKUP_VALUE 8192 /* debug the key lookup */ #define DBG_X509 (opt.debug & DBG_X509_VALUE) #define DBG_CRYPTO (opt.debug & DBG_CRYPTO_VALUE) #define DBG_MEMORY (opt.debug & DBG_MEMORY_VALUE) #define DBG_CACHE (opt.debug & DBG_CACHE_VALUE) #define DBG_HASHING (opt.debug & DBG_HASHING_VALUE) #define DBG_IPC (opt.debug & DBG_IPC_VALUE) #define DBG_CLOCK (opt.debug & DBG_CLOCK_VALUE) #define DBG_LOOKUP (opt.debug & DBG_LOOKUP_VALUE) /* Forward declaration for an object defined in server.c */ struct server_local_s; /* Session control object. This object is passed down to most functions. Note that the default values for it are set by gpgsm_init_default_ctrl(). */ struct server_control_s { int no_server; /* We are not running under server control */ int status_fd; /* Only for non-server mode */ struct server_local_s *server_local; audit_ctx_t audit; /* NULL or a context for the audit subsystem. */ int agent_seen; /* Flag indicating that the gpg-agent has been accessed. */ int with_colons; /* Use column delimited output format */ int with_secret; /* Mark secret keys in a public key listing. */ int with_chain; /* Include the certifying certs in a listing */ int with_validation;/* Validate each key while listing. */ int with_ephemeral_keys; /* Include ephemeral flagged keys in the keylisting. */ int autodetect_encoding; /* Try to detect the input encoding */ int is_pem; /* Is in PEM format */ int is_base64; /* is in plain base-64 format */ int create_base64; /* Create base64 encoded output */ int create_pem; /* create PEM output */ const char *pem_name; /* PEM name to use */ int include_certs; /* -1 to send all certificates in the chain along with a signature or the number of certificates up the chain (0 = none, 1 = only signer) */ int use_ocsp; /* Set to true if OCSP should be used. */ int validation_model; /* 0 := standard model (shell), 1 := chain model, 2 := STEED model. */ int offline; /* If true gpgsm won't do any network access. */ /* The current time. Used as a helper in certchain.c. */ ksba_isotime_t current_time; }; /* An object to keep a list of certificates. */ struct certlist_s { struct certlist_s *next; ksba_cert_t cert; int is_encrypt_to; /* True if the certificate has been set through the --encrypto-to option. */ + int pk_algo; /* The PK_ALGO from CERT or 0 if not yet known. */ int hash_algo; /* Used to track the hash algorithm to use. */ const char *hash_algo_oid; /* And the corresponding OID. */ }; typedef struct certlist_s *certlist_t; /* A structure carrying information about trusted root certificates. */ struct rootca_flags_s { unsigned int valid:1; /* The rest of the structure has valid information. */ unsigned int relax:1; /* Relax checking of root certificates. */ unsigned int chain_model:1; /* Root requires the use of the chain model. */ }; /*-- gpgsm.c --*/ void gpgsm_exit (int rc); void gpgsm_init_default_ctrl (struct server_control_s *ctrl); int gpgsm_parse_validation_model (const char *model); /*-- server.c --*/ void gpgsm_server (certlist_t default_recplist); gpg_error_t gpgsm_status (ctrl_t ctrl, int no, const char *text); gpg_error_t gpgsm_status2 (ctrl_t ctrl, int no, ...) GPGRT_ATTR_SENTINEL(0); gpg_error_t gpgsm_status_with_err_code (ctrl_t ctrl, int no, const char *text, gpg_err_code_t ec); gpg_error_t gpgsm_status_with_error (ctrl_t ctrl, int no, const char *text, gpg_error_t err); gpg_error_t gpgsm_proxy_pinentry_notify (ctrl_t ctrl, const unsigned char *line); /*-- fingerprint --*/ unsigned char *gpgsm_get_fingerprint (ksba_cert_t cert, int algo, unsigned char *array, int *r_len); char *gpgsm_get_fingerprint_string (ksba_cert_t cert, int algo); char *gpgsm_get_fingerprint_hexstring (ksba_cert_t cert, int algo); unsigned long gpgsm_get_short_fingerprint (ksba_cert_t cert, unsigned long *r_high); unsigned char *gpgsm_get_keygrip (ksba_cert_t cert, unsigned char *array); char *gpgsm_get_keygrip_hexstring (ksba_cert_t cert); int gpgsm_get_key_algo_info (ksba_cert_t cert, unsigned int *nbits); int gpgsm_get_key_algo_info2 (ksba_cert_t cert, unsigned int *nbits, char **r_curve); char *gpgsm_pubkey_algo_string (ksba_cert_t cert, int *r_algoid); gcry_mpi_t gpgsm_get_rsa_modulus (ksba_cert_t cert); char *gpgsm_get_certid (ksba_cert_t cert); /*-- certdump.c --*/ void gpgsm_print_serial (estream_t fp, ksba_const_sexp_t p); void gpgsm_print_time (estream_t fp, ksba_isotime_t t); void gpgsm_print_name2 (FILE *fp, const char *string, int translate); void gpgsm_print_name (FILE *fp, const char *string); void gpgsm_es_print_name (estream_t fp, const char *string); void gpgsm_es_print_name2 (estream_t fp, const char *string, int translate); void gpgsm_cert_log_name (const char *text, ksba_cert_t cert); void gpgsm_dump_cert (const char *text, ksba_cert_t cert); void gpgsm_dump_serial (ksba_const_sexp_t p); void gpgsm_dump_time (ksba_isotime_t t); void gpgsm_dump_string (const char *string); char *gpgsm_format_serial (ksba_const_sexp_t p); char *gpgsm_format_name2 (const char *name, int translate); char *gpgsm_format_name (const char *name); char *gpgsm_format_sn_issuer (ksba_sexp_t sn, const char *issuer); char *gpgsm_fpr_and_name_for_status (ksba_cert_t cert); char *gpgsm_format_keydesc (ksba_cert_t cert); /*-- certcheck.c --*/ int gpgsm_check_cert_sig (ksba_cert_t issuer_cert, ksba_cert_t cert); int gpgsm_check_cms_signature (ksba_cert_t cert, ksba_const_sexp_t sigval, gcry_md_hd_t md, int hash_algo, int *r_pkalgo); /* fixme: move create functions to another file */ int gpgsm_create_cms_signature (ctrl_t ctrl, ksba_cert_t cert, gcry_md_hd_t md, int mdalgo, unsigned char **r_sigval); /*-- certchain.c --*/ /* Flags used with gpgsm_validate_chain. */ #define VALIDATE_FLAG_NO_DIRMNGR 1 #define VALIDATE_FLAG_CHAIN_MODEL 2 #define VALIDATE_FLAG_STEED 4 int gpgsm_walk_cert_chain (ctrl_t ctrl, ksba_cert_t start, ksba_cert_t *r_next); int gpgsm_is_root_cert (ksba_cert_t cert); int gpgsm_validate_chain (ctrl_t ctrl, ksba_cert_t cert, ksba_isotime_t checktime, ksba_isotime_t r_exptime, int listmode, estream_t listfp, unsigned int flags, unsigned int *retflags); int gpgsm_basic_cert_check (ctrl_t ctrl, ksba_cert_t cert); /*-- certlist.c --*/ int gpgsm_cert_use_sign_p (ksba_cert_t cert, int silent); int gpgsm_cert_use_encrypt_p (ksba_cert_t cert); int gpgsm_cert_use_verify_p (ksba_cert_t cert); int gpgsm_cert_use_decrypt_p (ksba_cert_t cert); int gpgsm_cert_use_cert_p (ksba_cert_t cert); int gpgsm_cert_use_ocsp_p (ksba_cert_t cert); int gpgsm_cert_has_well_known_private_key (ksba_cert_t cert); int gpgsm_certs_identical_p (ksba_cert_t cert_a, ksba_cert_t cert_b); int gpgsm_add_cert_to_certlist (ctrl_t ctrl, ksba_cert_t cert, certlist_t *listaddr, int is_encrypt_to); int gpgsm_add_to_certlist (ctrl_t ctrl, const char *name, int secret, certlist_t *listaddr, int is_encrypt_to); void gpgsm_release_certlist (certlist_t list); int gpgsm_find_cert (ctrl_t ctrl, const char *name, ksba_sexp_t keyid, ksba_cert_t *r_cert, int allow_ambiguous); /*-- keylist.c --*/ gpg_error_t gpgsm_list_keys (ctrl_t ctrl, strlist_t names, estream_t fp, unsigned int mode); /*-- import.c --*/ int gpgsm_import (ctrl_t ctrl, int in_fd, int reimport_mode); int gpgsm_import_files (ctrl_t ctrl, int nfiles, char **files, int (*of)(const char *fname)); /*-- export.c --*/ void gpgsm_export (ctrl_t ctrl, strlist_t names, estream_t stream); void gpgsm_p12_export (ctrl_t ctrl, const char *name, estream_t stream, int rawmode); /*-- delete.c --*/ int gpgsm_delete (ctrl_t ctrl, strlist_t names); /*-- verify.c --*/ int gpgsm_verify (ctrl_t ctrl, int in_fd, int data_fd, estream_t out_fp); /*-- sign.c --*/ int gpgsm_get_default_cert (ctrl_t ctrl, ksba_cert_t *r_cert); int gpgsm_sign (ctrl_t ctrl, certlist_t signerlist, int data_fd, int detached, estream_t out_fp); /*-- encrypt.c --*/ int gpgsm_encrypt (ctrl_t ctrl, certlist_t recplist, int in_fd, estream_t out_fp); /*-- decrypt.c --*/ gpg_error_t ecdh_derive_kek (unsigned char *key, unsigned int keylen, int hash_algo, const char *wrap_algo_str, const void *secret, unsigned int secretlen, const void *ukm, unsigned int ukmlen); int gpgsm_decrypt (ctrl_t ctrl, int in_fd, estream_t out_fp); /*-- certreqgen.c --*/ int gpgsm_genkey (ctrl_t ctrl, estream_t in_stream, estream_t out_stream); /*-- certreqgen-ui.c --*/ void gpgsm_gencertreq_tty (ctrl_t ctrl, estream_t out_stream); /*-- qualified.c --*/ gpg_error_t gpgsm_is_in_qualified_list (ctrl_t ctrl, ksba_cert_t cert, char *country); gpg_error_t gpgsm_qualified_consent (ctrl_t ctrl, ksba_cert_t cert); gpg_error_t gpgsm_not_qualified_warning (ctrl_t ctrl, ksba_cert_t cert); /*-- call-agent.c --*/ int gpgsm_agent_pksign (ctrl_t ctrl, const char *keygrip, const char *desc, unsigned char *digest, size_t digestlen, int digestalgo, unsigned char **r_buf, size_t *r_buflen); int gpgsm_scd_pksign (ctrl_t ctrl, const char *keyid, const char *desc, unsigned char *digest, size_t digestlen, int digestalgo, unsigned char **r_buf, size_t *r_buflen); int gpgsm_agent_pkdecrypt (ctrl_t ctrl, const char *keygrip, const char *desc, ksba_const_sexp_t ciphertext, char **r_buf, size_t *r_buflen); int gpgsm_agent_genkey (ctrl_t ctrl, ksba_const_sexp_t keyparms, ksba_sexp_t *r_pubkey); int gpgsm_agent_readkey (ctrl_t ctrl, int fromcard, const char *hexkeygrip, ksba_sexp_t *r_pubkey); int gpgsm_agent_scd_serialno (ctrl_t ctrl, char **r_serialno); int gpgsm_agent_scd_keypairinfo (ctrl_t ctrl, strlist_t *r_list); int gpgsm_agent_istrusted (ctrl_t ctrl, ksba_cert_t cert, const char *hexfpr, struct rootca_flags_s *rootca_flags); int gpgsm_agent_havekey (ctrl_t ctrl, const char *hexkeygrip); int gpgsm_agent_marktrusted (ctrl_t ctrl, ksba_cert_t cert); int gpgsm_agent_learn (ctrl_t ctrl); int gpgsm_agent_passwd (ctrl_t ctrl, const char *hexkeygrip, const char *desc); gpg_error_t gpgsm_agent_get_confirmation (ctrl_t ctrl, const char *desc); gpg_error_t gpgsm_agent_send_nop (ctrl_t ctrl); gpg_error_t gpgsm_agent_keyinfo (ctrl_t ctrl, const char *hexkeygrip, char **r_serialno); gpg_error_t gpgsm_agent_ask_passphrase (ctrl_t ctrl, const char *desc_msg, int repeat, char **r_passphrase); gpg_error_t gpgsm_agent_keywrap_key (ctrl_t ctrl, int forexport, void **r_kek, size_t *r_keklen); gpg_error_t gpgsm_agent_import_key (ctrl_t ctrl, const void *key, size_t keylen); gpg_error_t gpgsm_agent_export_key (ctrl_t ctrl, const char *keygrip, const char *desc, unsigned char **r_result, size_t *r_resultlen); /*-- call-dirmngr.c --*/ int gpgsm_dirmngr_isvalid (ctrl_t ctrl, ksba_cert_t cert, ksba_cert_t issuer_cert, int use_ocsp); int gpgsm_dirmngr_lookup (ctrl_t ctrl, strlist_t names, const char *uri, int cache_only, void (*cb)(void*, ksba_cert_t), void *cb_value); int gpgsm_dirmngr_run_command (ctrl_t ctrl, const char *command, int argc, char **argv); /*-- misc.c --*/ void setup_pinentry_env (void); gpg_error_t transform_sigval (const unsigned char *sigval, size_t sigvallen, int mdalgo, unsigned char **r_newsigval, size_t *r_newsigvallen); #endif /*GPGSM_H*/ diff --git a/sm/sign.c b/sm/sign.c index caf96bfa4..79c53474d 100644 --- a/sm/sign.c +++ b/sm/sign.c @@ -1,942 +1,963 @@ /* sign.c - Sign a message * Copyright (C) 2001, 2002, 2003, 2008, * 2010 Free Software Foundation, Inc. * * This file is part of GnuPG. * * GnuPG is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * GnuPG is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ #include #include #include #include #include #include #include #include #include "gpgsm.h" #include #include #include "keydb.h" #include "../common/i18n.h" /* Hash the data and return if something was hashed. Return -1 on error. */ static int hash_data (int fd, gcry_md_hd_t md) { estream_t fp; char buffer[4096]; int nread; int rc = 0; fp = es_fdopen_nc (fd, "rb"); if (!fp) { log_error ("fdopen(%d) failed: %s\n", fd, strerror (errno)); return -1; } do { nread = es_fread (buffer, 1, DIM(buffer), fp); gcry_md_write (md, buffer, nread); } while (nread); if (es_ferror (fp)) { log_error ("read error on fd %d: %s\n", fd, strerror (errno)); rc = -1; } es_fclose (fp); return rc; } static int hash_and_copy_data (int fd, gcry_md_hd_t md, ksba_writer_t writer) { gpg_error_t err; estream_t fp; char buffer[4096]; int nread; int rc = 0; int any = 0; fp = es_fdopen_nc (fd, "rb"); if (!fp) { gpg_error_t tmperr = gpg_error_from_syserror (); log_error ("fdopen(%d) failed: %s\n", fd, strerror (errno)); return tmperr; } do { nread = es_fread (buffer, 1, DIM(buffer), fp); if (nread) { any = 1; gcry_md_write (md, buffer, nread); err = ksba_writer_write_octet_string (writer, buffer, nread, 0); if (err) { log_error ("write failed: %s\n", gpg_strerror (err)); rc = err; } } } while (nread && !rc); if (es_ferror (fp)) { rc = gpg_error_from_syserror (); log_error ("read error on fd %d: %s\n", fd, strerror (errno)); } es_fclose (fp); if (!any) { /* We can't allow signing an empty message because it does not make much sense and more seriously, ksba_cms_build has already written the tag for data and now expects an octet string and an octet string of size 0 is illegal. */ log_error ("cannot sign an empty message\n"); rc = gpg_error (GPG_ERR_NO_DATA); } if (!rc) { err = ksba_writer_write_octet_string (writer, NULL, 0, 1); if (err) { log_error ("write failed: %s\n", gpg_strerror (err)); rc = err; } } return rc; } /* Get the default certificate which is defined as the first certificate capable of signing returned by the keyDB and has a secret key available. */ int gpgsm_get_default_cert (ctrl_t ctrl, ksba_cert_t *r_cert) { KEYDB_HANDLE hd; ksba_cert_t cert = NULL; int rc; char *p; hd = keydb_new (); if (!hd) return gpg_error (GPG_ERR_GENERAL); rc = keydb_search_first (ctrl, hd); if (rc) { keydb_release (hd); return rc; } do { rc = keydb_get_cert (hd, &cert); if (rc) { log_error ("keydb_get_cert failed: %s\n", gpg_strerror (rc)); keydb_release (hd); return rc; } if (!gpgsm_cert_use_sign_p (cert, 1)) { p = gpgsm_get_keygrip_hexstring (cert); if (p) { if (!gpgsm_agent_havekey (ctrl, p)) { xfree (p); keydb_release (hd); *r_cert = cert; return 0; /* got it */ } xfree (p); } } ksba_cert_release (cert); cert = NULL; } while (!(rc = keydb_search_next (ctrl, hd))); if (rc && rc != -1) log_error ("keydb_search_next failed: %s\n", gpg_strerror (rc)); ksba_cert_release (cert); keydb_release (hd); return rc; } static ksba_cert_t get_default_signer (ctrl_t ctrl) { KEYDB_SEARCH_DESC desc; ksba_cert_t cert = NULL; KEYDB_HANDLE kh = NULL; int rc; if (!opt.local_user) { rc = gpgsm_get_default_cert (ctrl, &cert); if (rc) { if (rc != -1) log_debug ("failed to find default certificate: %s\n", gpg_strerror (rc)); return NULL; } return cert; } rc = classify_user_id (opt.local_user, &desc, 0); if (rc) { log_error ("failed to find default signer: %s\n", gpg_strerror (rc)); return NULL; } kh = keydb_new (); if (!kh) return NULL; rc = keydb_search (ctrl, kh, &desc, 1); if (rc) { log_debug ("failed to find default certificate: rc=%d\n", rc); } else { rc = keydb_get_cert (kh, &cert); if (rc) { log_debug ("failed to get cert: rc=%d\n", rc); } } keydb_release (kh); return cert; } /* Depending on the options in CTRL add the certificate CERT as well as other certificate up in the chain to the Root-CA to the CMS object. */ static int add_certificate_list (ctrl_t ctrl, ksba_cms_t cms, ksba_cert_t cert) { gpg_error_t err; int rc = 0; ksba_cert_t next = NULL; int n; int not_root = 0; ksba_cert_ref (cert); n = ctrl->include_certs; if (n == -2) { not_root = 1; n = -1; } if (n < 0 || n > 50) n = 50; /* We better apply an upper bound */ /* First add my own certificate unless we don't want any certificate included at all. */ if (n) { if (not_root && gpgsm_is_root_cert (cert)) err = 0; else err = ksba_cms_add_cert (cms, cert); if (err) goto ksba_failure; if (n>0) n--; } /* Walk the chain to include all other certificates. Note that a -1 used for N makes sure that there is no limit and all certs get included. */ while ( n-- && !(rc = gpgsm_walk_cert_chain (ctrl, cert, &next)) ) { if (not_root && gpgsm_is_root_cert (next)) err = 0; else err = ksba_cms_add_cert (cms, next); ksba_cert_release (cert); cert = next; next = NULL; if (err) goto ksba_failure; } ksba_cert_release (cert); return rc == -1? 0: rc; ksba_failure: ksba_cert_release (cert); log_error ("ksba_cms_add_cert failed: %s\n", gpg_strerror (err)); return err; } #if KSBA_VERSION_NUMBER >= 0x010400 && 0 /* 1.4.0 */ static gpg_error_t add_signed_attribute (ksba_cms_t cms, const char *attrstr) { gpg_error_t err; char **fields = NULL; const char *s; int i; unsigned char *der = NULL; size_t derlen; fields = strtokenize (attrstr, ":"); if (!fields) { err = gpg_error_from_syserror (); log_error ("strtokenize failed: %s\n", gpg_strerror (err)); goto leave; } for (i=0; fields[i]; i++) ; if (i != 3) { err = gpg_error (GPG_ERR_SYNTAX); log_error ("invalid attribute specification '%s': %s\n", attrstr, i < 3 ? "not enough fields":"too many fields"); goto leave; } if (!ascii_strcasecmp (fields[1], "u")) { err = 0; goto leave; /* Skip unsigned attributes. */ } if (ascii_strcasecmp (fields[1], "s")) { err = gpg_error (GPG_ERR_SYNTAX); log_error ("invalid attribute specification '%s': %s\n", attrstr, "type is not 's' or 'u'"); goto leave; } /* Check that the OID is valid. */ err = ksba_oid_from_str (fields[0], &der, &derlen); if (err) { log_error ("invalid attribute specification '%s': %s\n", attrstr, gpg_strerror (err)); goto leave; } xfree (der); der = NULL; if (strchr (fields[2], '/')) { /* FIXME: read from file. */ } else /* Directly given in hex. */ { for (i=0, s = fields[2]; hexdigitp (s); s++, i++) ; if (*s || !i || (i&1)) { log_error ("invalid attribute specification '%s': %s\n", attrstr, "invalid hex encoding of the data"); err = gpg_error (GPG_ERR_SYNTAX); goto leave; } der = xtrystrdup (fields[2]); if (!der) { err = gpg_error_from_syserror (); log_error ("malloc failed: %s\n", gpg_strerror (err)); goto leave; } for (s=fields[2], derlen=0; s[0] && s[1]; s += 2) der[derlen++] = xtoi_2 (s); } /* Store the data in the CMS object for all signers. */ err = ksba_cms_add_attribute (cms, -1, fields[0], 0, der, derlen); if (err) { log_error ("invalid attribute specification '%s': %s\n", attrstr, gpg_strerror (err)); goto leave; } leave: xfree (der); xfree (fields); return err; } #endif /*ksba >= 1.4.0 */ /* Perform a sign operation. Sign the data received on DATA-FD in embedded mode or in detached mode when DETACHED is true. Write the signature to OUT_FP. The keys used to sign are taken from SIGNERLIST or the default one will be used if the value of this argument is NULL. */ int gpgsm_sign (ctrl_t ctrl, certlist_t signerlist, int data_fd, int detached, estream_t out_fp) { int i, rc; gpg_error_t err; gnupg_ksba_io_t b64writer = NULL; ksba_writer_t writer; ksba_cms_t cms = NULL; ksba_stop_reason_t stopreason; KEYDB_HANDLE kh = NULL; gcry_md_hd_t data_md = NULL; int signer; const char *algoid; int algo; ksba_isotime_t signed_at; certlist_t cl; int release_signerlist = 0; audit_set_type (ctrl->audit, AUDIT_TYPE_SIGN); kh = keydb_new (); if (!kh) { log_error (_("failed to allocate keyDB handle\n")); rc = gpg_error (GPG_ERR_GENERAL); goto leave; } if (!gnupg_rng_is_compliant (opt.compliance)) { rc = gpg_error (GPG_ERR_FORBIDDEN); log_error (_("%s is not compliant with %s mode\n"), "RNG", gnupg_compliance_option_string (opt.compliance)); gpgsm_status_with_error (ctrl, STATUS_ERROR, "random-compliance", rc); goto leave; } ctrl->pem_name = "SIGNED MESSAGE"; rc = gnupg_ksba_create_writer (&b64writer, ((ctrl->create_pem? GNUPG_KSBA_IO_PEM : 0) | (ctrl->create_base64? GNUPG_KSBA_IO_BASE64 : 0)), ctrl->pem_name, out_fp, &writer); if (rc) { log_error ("can't create writer: %s\n", gpg_strerror (rc)); goto leave; } err = ksba_cms_new (&cms); if (err) { rc = err; goto leave; } err = ksba_cms_set_reader_writer (cms, NULL, writer); if (err) { log_debug ("ksba_cms_set_reader_writer failed: %s\n", gpg_strerror (err)); rc = err; goto leave; } /* We are going to create signed data with data as encap. content. * In authenticode mode we use spcIndirectDataContext instead. */ err = ksba_cms_set_content_type (cms, 0, KSBA_CT_SIGNED_DATA); if (!err) err = ksba_cms_set_content_type (cms, 1, #if KSBA_VERSION_NUMBER >= 0x010400 && 0 opt.authenticode? KSBA_CT_SPC_IND_DATA_CTX : #endif KSBA_CT_DATA ); if (err) { log_debug ("ksba_cms_set_content_type failed: %s\n", gpg_strerror (err)); rc = err; goto leave; } /* If no list of signers is given, use the default certificate. */ if (!signerlist) { ksba_cert_t cert = get_default_signer (ctrl); if (!cert) { log_error ("no default signer found\n"); gpgsm_status2 (ctrl, STATUS_INV_SGNR, get_inv_recpsgnr_code (GPG_ERR_NO_SECKEY), NULL); rc = gpg_error (GPG_ERR_GENERAL); goto leave; } /* Although we don't check for ambiguous specification we will check that the signer's certificate is usable and valid. */ rc = gpgsm_cert_use_sign_p (cert, 0); if (!rc) rc = gpgsm_validate_chain (ctrl, cert, "", NULL, 0, NULL, 0, NULL); if (rc) { char *tmpfpr; tmpfpr = gpgsm_get_fingerprint_hexstring (cert, 0); gpgsm_status2 (ctrl, STATUS_INV_SGNR, get_inv_recpsgnr_code (rc), tmpfpr, NULL); xfree (tmpfpr); goto leave; } /* That one is fine - create signerlist. */ signerlist = xtrycalloc (1, sizeof *signerlist); if (!signerlist) { rc = out_of_core (); ksba_cert_release (cert); goto leave; } signerlist->cert = cert; release_signerlist = 1; } + /* Figure out the hash algorithm to use. We do not want to use the one for the certificate but if possible an OID for the plain algorithm. */ if (opt.forced_digest_algo && opt.verbose) log_info ("user requested hash algorithm %d\n", opt.forced_digest_algo); for (i=0, cl=signerlist; cl; cl = cl->next, i++) { const char *oid; + unsigned int nbits; + int pk_algo; + + pk_algo = gpgsm_get_key_algo_info (cl->cert, &nbits); + cl->pk_algo = pk_algo; if (opt.forced_digest_algo) { oid = NULL; cl->hash_algo = opt.forced_digest_algo; } else { - oid = ksba_cert_get_digest_algo (cl->cert); + if (pk_algo == GCRY_PK_ECC) + { + /* Map the Curve to a corresponding hash algo. */ + if (nbits <= 256) + oid = "2.16.840.1.101.3.4.2.1"; /* sha256 */ + else if (nbits <= 384) + oid = "2.16.840.1.101.3.4.2.2"; /* sha384 */ + else + oid = "2.16.840.1.101.3.4.2.3"; /* sha512 */ + } + else + { + /* For RSA we reuse the hash algo used by the certificate. */ + oid = ksba_cert_get_digest_algo (cl->cert); + } cl->hash_algo = oid ? gcry_md_map_name (oid) : 0; } switch (cl->hash_algo) { case GCRY_MD_SHA1: oid = "1.3.14.3.2.26"; break; case GCRY_MD_RMD160: oid = "1.3.36.3.2.1"; break; case GCRY_MD_SHA224: oid = "2.16.840.1.101.3.4.2.4"; break; case GCRY_MD_SHA256: oid = "2.16.840.1.101.3.4.2.1"; break; case GCRY_MD_SHA384: oid = "2.16.840.1.101.3.4.2.2"; break; case GCRY_MD_SHA512: oid = "2.16.840.1.101.3.4.2.3"; break; /* case GCRY_MD_WHIRLPOOL: oid = "No OID yet"; break; */ case GCRY_MD_MD5: /* We don't want to use MD5. */ case 0: /* No algorithm found in cert. */ default: /* Other algorithms. */ log_info (_("hash algorithm %d (%s) for signer %d not supported;" " using %s\n"), cl->hash_algo, oid? oid: "?", i, gcry_md_algo_name (GCRY_MD_SHA1)); cl->hash_algo = GCRY_MD_SHA1; oid = "1.3.14.3.2.26"; break; } cl->hash_algo_oid = oid; /* Check compliance. */ if (! gnupg_digest_is_allowed (opt.compliance, 1, cl->hash_algo)) { log_error (_("digest algorithm '%s' may not be used in %s mode\n"), gcry_md_algo_name (cl->hash_algo), gnupg_compliance_option_string (opt.compliance)); err = gpg_error (GPG_ERR_DIGEST_ALGO); goto leave; } - { - unsigned int nbits; - int pk_algo = gpgsm_get_key_algo_info (cl->cert, &nbits); - - if (! gnupg_pk_is_allowed (opt.compliance, PK_USE_SIGNING, pk_algo, - NULL, nbits, NULL)) - { - char kidstr[10+1]; - - snprintf (kidstr, sizeof kidstr, "0x%08lX", - gpgsm_get_short_fingerprint (cl->cert, NULL)); - log_error (_("key %s may not be used for signing in %s mode\n"), - kidstr, - gnupg_compliance_option_string (opt.compliance)); - err = gpg_error (GPG_ERR_PUBKEY_ALGO); - goto leave; - } - } + if (! gnupg_pk_is_allowed (opt.compliance, PK_USE_SIGNING, pk_algo, + NULL, nbits, NULL)) + { + char kidstr[10+1]; + + snprintf (kidstr, sizeof kidstr, "0x%08lX", + gpgsm_get_short_fingerprint (cl->cert, NULL)); + log_error (_("key %s may not be used for signing in %s mode\n"), + kidstr, + gnupg_compliance_option_string (opt.compliance)); + err = gpg_error (GPG_ERR_PUBKEY_ALGO); + goto leave; + } + } - if (opt.verbose) + if (opt.verbose > 1 || opt.debug) { for (i=0, cl=signerlist; cl; cl = cl->next, i++) log_info (_("hash algorithm used for signer %d: %s (%s)\n"), i, gcry_md_algo_name (cl->hash_algo), cl->hash_algo_oid); } /* Gather certificates of signers and store them in the CMS object. */ for (cl=signerlist; cl; cl = cl->next) { rc = gpgsm_cert_use_sign_p (cl->cert, 0); if (rc) goto leave; err = ksba_cms_add_signer (cms, cl->cert); if (err) { log_error ("ksba_cms_add_signer failed: %s\n", gpg_strerror (err)); rc = err; goto leave; } rc = add_certificate_list (ctrl, cms, cl->cert); if (rc) { log_error ("failed to store list of certificates: %s\n", gpg_strerror(rc)); goto leave; } /* Set the hash algorithm we are going to use */ err = ksba_cms_add_digest_algo (cms, cl->hash_algo_oid); if (err) { log_debug ("ksba_cms_add_digest_algo failed: %s\n", gpg_strerror (err)); rc = err; goto leave; } } /* Check whether one of the certificates is qualified. Note that we already validated the certificate and thus the user data stored flag must be available. */ if (!opt.no_chain_validation) { for (cl=signerlist; cl; cl = cl->next) { size_t buflen; char buffer[1]; err = ksba_cert_get_user_data (cl->cert, "is_qualified", &buffer, sizeof (buffer), &buflen); if (err || !buflen) { log_error (_("checking for qualified certificate failed: %s\n"), gpg_strerror (err)); rc = err; goto leave; } if (*buffer) err = gpgsm_qualified_consent (ctrl, cl->cert); else err = gpgsm_not_qualified_warning (ctrl, cl->cert); if (err) { rc = err; goto leave; } } } /* Prepare hashing (actually we are figuring out what we have set above). */ rc = gcry_md_open (&data_md, 0, 0); if (rc) { log_error ("md_open failed: %s\n", gpg_strerror (rc)); goto leave; } if (DBG_HASHING) gcry_md_debug (data_md, "sign.data"); for (i=0; (algoid=ksba_cms_get_digest_algo_list (cms, i)); i++) { algo = gcry_md_map_name (algoid); if (!algo) { log_error ("unknown hash algorithm '%s'\n", algoid? algoid:"?"); rc = gpg_error (GPG_ERR_BUG); goto leave; } gcry_md_enable (data_md, algo); audit_log_i (ctrl->audit, AUDIT_DATA_HASH_ALGO, algo); } audit_log (ctrl->audit, AUDIT_SETUP_READY); if (detached) { /* We hash the data right now so that we can store the message digest. ksba_cms_build() takes this as an flag that detached data is expected. */ unsigned char *digest; size_t digest_len; if (!hash_data (data_fd, data_md)) audit_log (ctrl->audit, AUDIT_GOT_DATA); for (cl=signerlist,signer=0; cl; cl = cl->next, signer++) { digest = gcry_md_read (data_md, cl->hash_algo); digest_len = gcry_md_get_algo_dlen (cl->hash_algo); if ( !digest || !digest_len ) { log_error ("problem getting the hash of the data\n"); rc = gpg_error (GPG_ERR_BUG); goto leave; } err = ksba_cms_set_message_digest (cms, signer, digest, digest_len); if (err) { log_error ("ksba_cms_set_message_digest failed: %s\n", gpg_strerror (err)); rc = err; goto leave; } } } gnupg_get_isotime (signed_at); for (cl=signerlist,signer=0; cl; cl = cl->next, signer++) { err = ksba_cms_set_signing_time (cms, signer, signed_at); if (err) { log_error ("ksba_cms_set_signing_time failed: %s\n", gpg_strerror (err)); rc = err; goto leave; } } /* We can add signed attributes only when build against libksba 1.4. */ #if KSBA_VERSION_NUMBER >= 0x010400 && 0 /* 1.4.0 */ { strlist_t sl; for (sl = opt.attributes; sl; sl = sl->next) if ((err = add_signed_attribute (cms, sl->d))) goto leave; } #else if (opt.attributes) log_info ("Note: option --attribute is ignored by this version\n"); #endif /*ksba >= 1.4.0 */ /* We need to write at least a minimal list of our capabilities to try to convince some MUAs to use 3DES and not the crippled RC2. Our list is: aes128-CBC des-EDE3-CBC */ err = ksba_cms_add_smime_capability (cms, "2.16.840.1.101.3.4.1.2", NULL, 0); if (!err) err = ksba_cms_add_smime_capability (cms, "1.2.840.113549.3.7", NULL, 0); if (err) { log_error ("ksba_cms_add_smime_capability failed: %s\n", gpg_strerror (err)); goto leave; } /* Main building loop. */ do { err = ksba_cms_build (cms, &stopreason); if (err) { log_debug ("ksba_cms_build failed: %s\n", gpg_strerror (err)); rc = err; goto leave; } if (stopreason == KSBA_SR_BEGIN_DATA) { /* Hash the data and store the message digest. */ unsigned char *digest; size_t digest_len; assert (!detached); rc = hash_and_copy_data (data_fd, data_md, writer); if (rc) goto leave; audit_log (ctrl->audit, AUDIT_GOT_DATA); for (cl=signerlist,signer=0; cl; cl = cl->next, signer++) { digest = gcry_md_read (data_md, cl->hash_algo); digest_len = gcry_md_get_algo_dlen (cl->hash_algo); if ( !digest || !digest_len ) { log_error ("problem getting the hash of the data\n"); rc = gpg_error (GPG_ERR_BUG); goto leave; } err = ksba_cms_set_message_digest (cms, signer, digest, digest_len); if (err) { log_error ("ksba_cms_set_message_digest failed: %s\n", gpg_strerror (err)); rc = err; goto leave; } } } else if (stopreason == KSBA_SR_NEED_SIG) { /* Compute the signature for all signers. */ gcry_md_hd_t md; rc = gcry_md_open (&md, 0, 0); if (rc) { log_error ("md_open failed: %s\n", gpg_strerror (rc)); goto leave; } if (DBG_HASHING) gcry_md_debug (md, "sign.attr"); ksba_cms_set_hash_function (cms, HASH_FNC, md); for (cl=signerlist,signer=0; cl; cl = cl->next, signer++) { unsigned char *sigval = NULL; char *buf, *fpr; audit_log_i (ctrl->audit, AUDIT_NEW_SIG, signer); if (signer) gcry_md_reset (md); { certlist_t cl_tmp; for (cl_tmp=signerlist; cl_tmp; cl_tmp = cl_tmp->next) { gcry_md_enable (md, cl_tmp->hash_algo); audit_log_i (ctrl->audit, AUDIT_ATTR_HASH_ALGO, cl_tmp->hash_algo); } } rc = ksba_cms_hash_signed_attrs (cms, signer); if (rc) { log_debug ("hashing signed attrs failed: %s\n", gpg_strerror (rc)); gcry_md_close (md); goto leave; } rc = gpgsm_create_cms_signature (ctrl, cl->cert, md, cl->hash_algo, &sigval); if (rc) { audit_log_cert (ctrl->audit, AUDIT_SIGNED_BY, cl->cert, rc); gcry_md_close (md); goto leave; } err = ksba_cms_set_sig_val (cms, signer, sigval); xfree (sigval); if (err) { audit_log_cert (ctrl->audit, AUDIT_SIGNED_BY, cl->cert, err); log_error ("failed to store the signature: %s\n", gpg_strerror (err)); rc = err; gcry_md_close (md); goto leave; } /* write a status message */ fpr = gpgsm_get_fingerprint_hexstring (cl->cert, GCRY_MD_SHA1); if (!fpr) { rc = gpg_error (GPG_ERR_ENOMEM); gcry_md_close (md); goto leave; } rc = 0; - { - int pkalgo = gpgsm_get_key_algo_info (cl->cert, NULL); - buf = xtryasprintf ("%c %d %d 00 %s %s", - detached? 'D':'S', - pkalgo, - cl->hash_algo, - signed_at, - fpr); - if (!buf) - rc = gpg_error_from_syserror (); - } + if (opt.verbose) + { + char *pkalgostr = gpgsm_pubkey_algo_string (cl->cert, NULL); + log_info (_("%s/%s signature using %s key %s\n"), + pubkey_algo_to_string (cl->pk_algo), + gcry_md_algo_name (cl->hash_algo), + pkalgostr, fpr); + xfree (pkalgostr); + } + buf = xtryasprintf ("%c %d %d 00 %s %s", + detached? 'D':'S', + cl->pk_algo, + cl->hash_algo, + signed_at, + fpr); + if (!buf) + rc = gpg_error_from_syserror (); xfree (fpr); if (rc) { gcry_md_close (md); goto leave; } gpgsm_status (ctrl, STATUS_SIG_CREATED, buf); xfree (buf); audit_log_cert (ctrl->audit, AUDIT_SIGNED_BY, cl->cert, 0); } gcry_md_close (md); } } while (stopreason != KSBA_SR_READY); rc = gnupg_ksba_finish_writer (b64writer); if (rc) { log_error ("write failed: %s\n", gpg_strerror (rc)); goto leave; } audit_log (ctrl->audit, AUDIT_SIGNING_DONE); log_info ("signature created\n"); - leave: if (rc) log_error ("error creating signature: %s <%s>\n", gpg_strerror (rc), gpg_strsource (rc) ); if (release_signerlist) gpgsm_release_certlist (signerlist); ksba_cms_release (cms); gnupg_ksba_destroy_writer (b64writer); keydb_release (kh); gcry_md_close (data_md); return rc; }