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tdepim/libkdenetwork/libgpgme-copy/gpgme/verify.c

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/* verify.c - Signature verification.
Copyright (C) 2000 Werner Koch (dd9jn)
Copyright (C) 2001, 2002, 2003, 2004, 2005 g10 Code GmbH
This file is part of GPGME.
GPGME is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
GPGME 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include "gpgme.h"
#include "util.h"
#include "context.h"
#include "ops.h"
typedef struct
{
struct _gpgme_op_verify_result result;
gpgme_signature_t current_sig;
int did_prepare_new_sig;
int only_newsig_seen;
int plaintext_seen;
} *op_data_t;
static void
release_op_data (void *hook)
{
op_data_t opd = (op_data_t) hook;
gpgme_signature_t sig = opd->result.signatures;
while (sig)
{
gpgme_signature_t next = sig->next;
gpgme_sig_notation_t notation = sig->notations;
while (notation)
{
gpgme_sig_notation_t next_nota = notation->next;
_gpgme_sig_notation_free (notation);
notation = next_nota;
}
if (sig->fpr)
free (sig->fpr);
if (sig->pka_address)
free (sig->pka_address);
free (sig);
sig = next;
}
if (opd->result.file_name)
free (opd->result.file_name);
}
gpgme_verify_result_t
gpgme_op_verify_result (gpgme_ctx_t ctx)
{
void *hook;
op_data_t opd;
gpgme_error_t err;
err = _gpgme_op_data_lookup (ctx, OPDATA_VERIFY, &hook, -1, NULL);
opd = hook;
if (err || !opd)
return NULL;
return &opd->result;
}
/* Build a summary vector from RESULT. */
static void
calc_sig_summary (gpgme_signature_t sig)
{
unsigned long sum = 0;
/* Calculate the red/green flag. */
if (sig->validity == GPGME_VALIDITY_FULL
|| sig->validity == GPGME_VALIDITY_ULTIMATE)
{
if (gpg_err_code (sig->status) == GPG_ERR_NO_ERROR
|| gpg_err_code (sig->status) == GPG_ERR_SIG_EXPIRED
|| gpg_err_code (sig->status) == GPG_ERR_KEY_EXPIRED)
sum |= GPGME_SIGSUM_GREEN;
}
else if (sig->validity == GPGME_VALIDITY_NEVER)
{
if (gpg_err_code (sig->status) == GPG_ERR_NO_ERROR
|| gpg_err_code (sig->status) == GPG_ERR_SIG_EXPIRED
|| gpg_err_code (sig->status) == GPG_ERR_KEY_EXPIRED)
sum |= GPGME_SIGSUM_RED;
}
else if (gpg_err_code (sig->status) == GPG_ERR_BAD_SIGNATURE)
sum |= GPGME_SIGSUM_RED;
/* FIXME: handle the case when key and message are expired. */
switch (gpg_err_code (sig->status))
{
case GPG_ERR_SIG_EXPIRED:
sum |= GPGME_SIGSUM_SIG_EXPIRED;
break;
case GPG_ERR_KEY_EXPIRED:
sum |= GPGME_SIGSUM_KEY_EXPIRED;
break;
case GPG_ERR_NO_PUBKEY:
sum |= GPGME_SIGSUM_KEY_MISSING;
break;
case GPG_ERR_BAD_SIGNATURE:
case GPG_ERR_NO_ERROR:
break;
default:
sum |= GPGME_SIGSUM_SYS_ERROR;
break;
}
/* Now look at the certain reason codes. */
switch (gpg_err_code (sig->validity_reason))
{
case GPG_ERR_CRL_TOO_OLD:
if (sig->validity == GPGME_VALIDITY_UNKNOWN)
sum |= GPGME_SIGSUM_CRL_TOO_OLD;
break;
case GPG_ERR_CERT_REVOKED:
sum |= GPGME_SIGSUM_KEY_REVOKED;
break;
default:
break;
}
/* Check other flags. */
if (sig->wrong_key_usage)
sum |= GPGME_SIGSUM_BAD_POLICY;
/* Set the valid flag when the signature is unquestionable
valid. */
if ((sum & GPGME_SIGSUM_GREEN) && !(sum & ~GPGME_SIGSUM_GREEN))
sum |= GPGME_SIGSUM_VALID;
sig->summary = sum;
}
static gpgme_error_t
prepare_new_sig (op_data_t opd)
{
gpgme_signature_t sig;
if (opd->only_newsig_seen && opd->current_sig)
{
/* We have only seen the NEWSIG status and nothing else - we
better skip this signature therefore and reuse it for the
next possible signature. */
sig = opd->current_sig;
memset (sig, 0, sizeof *sig);
assert (opd->result.signatures == sig);
}
else
{
sig = calloc (1, sizeof (*sig));
if (!sig)
return gpg_error_from_errno (errno);
if (!opd->result.signatures)
opd->result.signatures = sig;
if (opd->current_sig)
opd->current_sig->next = sig;
opd->current_sig = sig;
}
opd->did_prepare_new_sig = 1;
opd->only_newsig_seen = 0;
return 0;
}
static gpgme_error_t
parse_new_sig (op_data_t opd, gpgme_status_code_t code, char *args)
{
gpgme_signature_t sig;
char *end = strchr (args, ' ');
char *tail;
if (end)
{
*end = '\0';
end++;
}
if (!opd->did_prepare_new_sig)
{
gpg_error_t err;
err = prepare_new_sig (opd);
if (err)
return err;
}
assert (opd->did_prepare_new_sig);
opd->did_prepare_new_sig = 0;
assert (opd->current_sig);
sig = opd->current_sig;
/* FIXME: We should set the source of the state. */
switch (code)
{
case GPGME_STATUS_GOODSIG:
sig->status = gpg_error (GPG_ERR_NO_ERROR);
break;
case GPGME_STATUS_EXPSIG:
sig->status = gpg_error (GPG_ERR_SIG_EXPIRED);
break;
case GPGME_STATUS_EXPKEYSIG:
sig->status = gpg_error (GPG_ERR_KEY_EXPIRED);
break;
case GPGME_STATUS_BADSIG:
sig->status = gpg_error (GPG_ERR_BAD_SIGNATURE);
break;
case GPGME_STATUS_REVKEYSIG:
sig->status = gpg_error (GPG_ERR_CERT_REVOKED);
break;
case GPGME_STATUS_ERRSIG:
/* Parse the pubkey algo. */
if (!end)
goto parse_err_sig_fail;
errno = 0;
sig->pubkey_algo = strtol (end, &tail, 0);
if (errno || end == tail || *tail != ' ')
goto parse_err_sig_fail;
end = tail;
while (*end == ' ')
end++;
/* Parse the hash algo. */
if (!*end)
goto parse_err_sig_fail;
errno = 0;
sig->hash_algo = strtol (end, &tail, 0);
if (errno || end == tail || *tail != ' ')
goto parse_err_sig_fail;
end = tail;
while (*end == ' ')
end++;
/* Skip the sig class. */
end = strchr (end, ' ');
if (!end)
goto parse_err_sig_fail;
while (*end == ' ')
end++;
/* Parse the timestamp. */
sig->timestamp = _gpgme_parse_timestamp (end, &tail);
if (sig->timestamp == -1 || end == tail || (*tail && *tail != ' '))
return gpg_error (GPG_ERR_INV_ENGINE);
end = tail;
while (*end == ' ')
end++;
/* Parse the return code. */
if (end[0] && (!end[1] || end[1] == ' '))
{
switch (end[0])
{
case '4':
sig->status = gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM);
break;
case '9':
sig->status = gpg_error (GPG_ERR_NO_PUBKEY);
break;
default:
sig->status = gpg_error (GPG_ERR_GENERAL);
}
}
else
goto parse_err_sig_fail;
goto parse_err_sig_ok;
parse_err_sig_fail:
sig->status = gpg_error (GPG_ERR_GENERAL);
parse_err_sig_ok:
break;
default:
return gpg_error (GPG_ERR_GENERAL);
}
if (*args)
{
sig->fpr = strdup (args);
if (!sig->fpr)
return gpg_error_from_errno (errno);
}
return 0;
}
static gpgme_error_t
parse_valid_sig (gpgme_signature_t sig, char *args)
{
char *end = strchr (args, ' ');
if (end)
{
*end = '\0';
end++;
}
if (!*args)
/* We require at least the fingerprint. */
return gpg_error (GPG_ERR_GENERAL);
if (sig->fpr)
free (sig->fpr);
sig->fpr = strdup (args);
if (!sig->fpr)
return gpg_error_from_errno (errno);
/* Skip the creation date. */
end = strchr (end, ' ');
if (end)
{
char *tail;
sig->timestamp = _gpgme_parse_timestamp (end, &tail);
if (sig->timestamp == -1 || end == tail || (*tail && *tail != ' '))
return gpg_error (GPG_ERR_INV_ENGINE);
end = tail;
sig->exp_timestamp = _gpgme_parse_timestamp (end, &tail);
if (sig->exp_timestamp == -1 || end == tail || (*tail && *tail != ' '))
return gpg_error (GPG_ERR_INV_ENGINE);
end = tail;
while (*end == ' ')
end++;
/* Skip the signature version. */
end = strchr (end, ' ');
if (end)
{
while (*end == ' ')
end++;
/* Skip the reserved field. */
end = strchr (end, ' ');
if (end)
{
/* Parse the pubkey algo. */
errno = 0;
sig->pubkey_algo = strtol (end, &tail, 0);
if (errno || end == tail || *tail != ' ')
return gpg_error (GPG_ERR_INV_ENGINE);
end = tail;
while (*end == ' ')
end++;
if (*end)
{
/* Parse the hash algo. */
errno = 0;
sig->hash_algo = strtol (end, &tail, 0);
if (errno || end == tail || *tail != ' ')
return gpg_error (GPG_ERR_INV_ENGINE);
end = tail;
}
}
}
}
return 0;
}
static gpgme_error_t
parse_notation (gpgme_signature_t sig, gpgme_status_code_t code, char *args)
{
gpgme_error_t err;
gpgme_sig_notation_t *lastp = &sig->notations;
gpgme_sig_notation_t notation = sig->notations;
char *end = strchr (args, ' ');
if (end)
*end = '\0';
if (code == GPGME_STATUS_NOTATION_NAME || code == GPGME_STATUS_POLICY_URL)
{
/* FIXME: We could keep a pointer to the last notation in the list. */
while (notation && notation->value)
{
lastp = &notation->next;
notation = notation->next;
}
if (notation)
/* There is another notation name without data for the
previous one. The crypto backend misbehaves. */
return gpg_error (GPG_ERR_INV_ENGINE);
err = _gpgme_sig_notation_create (&notation, NULL, 0, NULL, 0, 0);
if (err)
return err;
if (code == GPGME_STATUS_NOTATION_NAME)
{
err = _gpgme_decode_percent_string (args, &notation->name, 0, 0);
if (err)
{
_gpgme_sig_notation_free (notation);
return err;
}
notation->name_len = strlen (notation->name);
/* FIXME: For now we fake the human-readable flag. The
critical flag can not be reported as it is not
provided. */
notation->flags = GPGME_SIG_NOTATION_HUMAN_READABLE;
notation->human_readable = 1;
}
else
{
/* This is a policy URL. */
err = _gpgme_decode_percent_string (args, &notation->value, 0, 0);
if (err)
{
_gpgme_sig_notation_free (notation);
return err;
}
notation->value_len = strlen (notation->value);
}
*lastp = notation;
}
else if (code == GPGME_STATUS_NOTATION_DATA)
{
int len = strlen (args) + 1;
char *dest;
/* FIXME: We could keep a pointer to the last notation in the list. */
while (notation && notation->next)
{
lastp = &notation->next;
notation = notation->next;
}
if (!notation || !notation->name)
/* There is notation data without a previous notation
name. The crypto backend misbehaves. */
return gpg_error (GPG_ERR_INV_ENGINE);
if (!notation->value)
{
dest = notation->value = malloc (len);
if (!dest)
return gpg_error_from_errno (errno);
}
else
{
int cur_len = strlen (notation->value);
dest = realloc (notation->value, len + strlen (notation->value));
if (!dest)
return gpg_error_from_errno (errno);
notation->value = dest;
dest += cur_len;
}
err = _gpgme_decode_percent_string (args, &dest, len, 0);
if (err)
return err;
notation->value_len += strlen (dest);
}
else
return gpg_error (GPG_ERR_INV_ENGINE);
return 0;
}
static gpgme_error_t
parse_trust (gpgme_signature_t sig, gpgme_status_code_t code, char *args)
{
char *end = strchr (args, ' ');
if (end)
*end = '\0';
switch (code)
{
case GPGME_STATUS_TRUST_UNDEFINED:
default:
sig->validity = GPGME_VALIDITY_UNKNOWN;
break;
case GPGME_STATUS_TRUST_NEVER:
sig->validity = GPGME_VALIDITY_NEVER;
break;
case GPGME_STATUS_TRUST_MARGINAL:
sig->validity = GPGME_VALIDITY_MARGINAL;
break;
case GPGME_STATUS_TRUST_FULLY:
case GPGME_STATUS_TRUST_ULTIMATE:
sig->validity = GPGME_VALIDITY_FULL;
break;
}
if (*args)
sig->validity_reason = _gpgme_map_gnupg_error (args);
else
sig->validity_reason = 0;
return 0;
}
/* Parse an error status line and if SET_STATUS is true update the
result status as appropriate. With SET_STATUS being false, only
check for an error. */
static gpgme_error_t
parse_error (gpgme_signature_t sig, char *args, int set_status)
{
gpgme_error_t err;
char *where = strchr (args, ' ');
char *which;
if (where)
{
*where = '\0';
which = where + 1;
where = strchr (which, ' ');
if (where)
*where = '\0';
where = args;
}
else
return gpg_error (GPG_ERR_INV_ENGINE);
err = _gpgme_map_gnupg_error (which);
if (!strcmp (where, "proc_pkt.plaintext")
&& gpg_err_code (err) == GPG_ERR_BAD_DATA)
{
/* This indicates a double plaintext. The only solid way to
handle this is by failing the oepration. */
return gpg_error (GPG_ERR_BAD_DATA);
}
else if (!set_status)
;
else if (!strcmp (where, "verify.findkey"))
sig->status = err;
else if (!strcmp (where, "verify.keyusage")
&& gpg_err_code (err) == GPG_ERR_WRONG_KEY_USAGE)
sig->wrong_key_usage = 1;
return 0;
}
gpgme_error_t
_gpgme_verify_status_handler (void *priv, gpgme_status_code_t code, char *args)
{
gpgme_ctx_t ctx = (gpgme_ctx_t) priv;
gpgme_error_t err;
void *hook;
op_data_t opd;
gpgme_signature_t sig;
char *end;
err = _gpgme_op_data_lookup (ctx, OPDATA_VERIFY, &hook, -1, NULL);
opd = hook;
if (err)
return err;
sig = opd->current_sig;
switch (code)
{
case GPGME_STATUS_NEWSIG:
if (sig)
calc_sig_summary (sig);
err = prepare_new_sig (opd);
opd->only_newsig_seen = 1;
return err;
case GPGME_STATUS_GOODSIG:
case GPGME_STATUS_EXPSIG:
case GPGME_STATUS_EXPKEYSIG:
case GPGME_STATUS_BADSIG:
case GPGME_STATUS_ERRSIG:
case GPGME_STATUS_REVKEYSIG:
if (sig && !opd->did_prepare_new_sig)
calc_sig_summary (sig);
opd->only_newsig_seen = 0;
return parse_new_sig (opd, code, args);
case GPGME_STATUS_VALIDSIG:
opd->only_newsig_seen = 0;
return sig ? parse_valid_sig (sig, args)
: gpg_error (GPG_ERR_INV_ENGINE);
case GPGME_STATUS_NODATA:
opd->only_newsig_seen = 0;
if (!sig)
return gpg_error (GPG_ERR_NO_DATA);
sig->status = gpg_error (GPG_ERR_NO_DATA);
break;
case GPGME_STATUS_UNEXPECTED:
opd->only_newsig_seen = 0;
if (!sig)
return gpg_error (GPG_ERR_GENERAL);
sig->status = gpg_error (GPG_ERR_NO_DATA);
break;
case GPGME_STATUS_NOTATION_NAME:
case GPGME_STATUS_NOTATION_DATA:
case GPGME_STATUS_POLICY_URL:
opd->only_newsig_seen = 0;
return sig ? parse_notation (sig, code, args)
: gpg_error (GPG_ERR_INV_ENGINE);
case GPGME_STATUS_TRUST_UNDEFINED:
case GPGME_STATUS_TRUST_NEVER:
case GPGME_STATUS_TRUST_MARGINAL:
case GPGME_STATUS_TRUST_FULLY:
case GPGME_STATUS_TRUST_ULTIMATE:
opd->only_newsig_seen = 0;
return sig ? parse_trust (sig, code, args)
: gpg_error (GPG_ERR_INV_ENGINE);
case GPGME_STATUS_PKA_TRUST_BAD:
case GPGME_STATUS_PKA_TRUST_GOOD:
opd->only_newsig_seen = 0;
/* Check that we only get one of these status codes per
signature; if not the crypto backend misbehaves. */
if (!sig || sig->pka_trust || sig->pka_address)
return gpg_error (GPG_ERR_INV_ENGINE);
sig->pka_trust = code == GPGME_STATUS_PKA_TRUST_GOOD? 2 : 1;
end = strchr (args, ' ');
if (end)
*end = 0;
sig->pka_address = strdup (args);
break;
case GPGME_STATUS_ERROR:
opd->only_newsig_seen = 0;
/* Some error stati are informational, so we don't return an
error code if we are not ready to process this status. */
return parse_error (sig, args, !!sig );
case GPGME_STATUS_EOF:
if (sig && !opd->did_prepare_new_sig)
calc_sig_summary (sig);
if (opd->only_newsig_seen && sig)
{
gpgme_signature_t sig2;
/* The last signature has no valid information - remove it
from the list. */
assert (!sig->next);
if (sig == opd->result.signatures)
opd->result.signatures = NULL;
else
{
for (sig2 = opd->result.signatures; sig2; sig2 = sig2->next)
if (sig2->next == sig)
{
sig2->next = NULL;
break;
}
}
/* Note that there is no need to release the members of SIG
because we won't be here if they have been set. */
free (sig);
opd->current_sig = NULL;
}
opd->only_newsig_seen = 0;
break;
case GPGME_STATUS_PLAINTEXT:
if (++opd->plaintext_seen > 1)
return gpg_error (GPG_ERR_BAD_DATA);
err = _gpgme_parse_plaintext (args, &opd->result.file_name);
if (err)
return err;
default:
break;
}
return 0;
}
static gpgme_error_t
verify_status_handler (void *priv, gpgme_status_code_t code, char *args)
{
gpgme_error_t err;
err = _gpgme_progress_status_handler (priv, code, args);
if (!err)
err = _gpgme_verify_status_handler (priv, code, args);
return err;
}
gpgme_error_t
_gpgme_op_verify_init_result (gpgme_ctx_t ctx)
{
void *hook;
op_data_t opd;
return _gpgme_op_data_lookup (ctx, OPDATA_VERIFY, &hook,
sizeof (*opd), release_op_data);
}
static gpgme_error_t
verify_start (gpgme_ctx_t ctx, int synchronous, gpgme_data_t sig,
gpgme_data_t signed_text, gpgme_data_t plaintext)
{
gpgme_error_t err;
err = _gpgme_op_reset (ctx, synchronous);
if (err)
return err;
err = _gpgme_op_verify_init_result (ctx);
if (err)
return err;
_gpgme_engine_set_status_handler (ctx->engine, verify_status_handler, ctx);
if (!sig)
return gpg_error (GPG_ERR_NO_DATA);
if (!signed_text && !plaintext)
return gpg_error (GPG_ERR_INV_VALUE);
return _gpgme_engine_op_verify (ctx->engine, sig, signed_text, plaintext);
}
/* Decrypt ciphertext CIPHER and make a signature verification within
CTX and store the resulting plaintext in PLAIN. */
gpgme_error_t
gpgme_op_verify_start (gpgme_ctx_t ctx, gpgme_data_t sig,
gpgme_data_t signed_text, gpgme_data_t plaintext)
{
return verify_start (ctx, 0, sig, signed_text, plaintext);
}
/* Decrypt ciphertext CIPHER and make a signature verification within
CTX and store the resulting plaintext in PLAIN. */
gpgme_error_t
gpgme_op_verify (gpgme_ctx_t ctx, gpgme_data_t sig, gpgme_data_t signed_text,
gpgme_data_t plaintext)
{
gpgme_error_t err;
err = verify_start (ctx, 1, sig, signed_text, plaintext);
if (!err)
err = _gpgme_wait_one (ctx);
return err;
}
/* Compatibility interfaces. */
/* Get the key used to create signature IDX in CTX and return it in
R_KEY. */
gpgme_error_t
gpgme_get_sig_key (gpgme_ctx_t ctx, int idx, gpgme_key_t *r_key)
{
gpgme_verify_result_t result;
gpgme_signature_t sig;
result = gpgme_op_verify_result (ctx);
sig = result->signatures;
while (sig && idx)
{
sig = sig->next;
idx--;
}
if (!sig || idx)
return gpg_error (GPG_ERR_EOF);
return gpgme_get_key (ctx, sig->fpr, r_key, 0);
}
/* Retrieve the signature status of signature IDX in CTX after a
successful verify operation in R_STAT (if non-null). The creation
time stamp of the signature is returned in R_CREATED (if non-null).
The function returns a string containing the fingerprint. */
const char *
gpgme_get_sig_status (gpgme_ctx_t ctx, int idx,
_gpgme_sig_stat_t *r_stat, time_t *r_created)
{
gpgme_verify_result_t result;
gpgme_signature_t sig;
result = gpgme_op_verify_result (ctx);
sig = result->signatures;
while (sig && idx)
{
sig = sig->next;
idx--;
}
if (!sig || idx)
return NULL;
if (r_stat)
{
switch (gpg_err_code (sig->status))
{
case GPG_ERR_NO_ERROR:
*r_stat = GPGME_SIG_STAT_GOOD;
break;
case GPG_ERR_BAD_SIGNATURE:
*r_stat = GPGME_SIG_STAT_BAD;
break;
case GPG_ERR_NO_PUBKEY:
*r_stat = GPGME_SIG_STAT_NOKEY;
break;
case GPG_ERR_NO_DATA:
*r_stat = GPGME_SIG_STAT_NOSIG;
break;
case GPG_ERR_SIG_EXPIRED:
*r_stat = GPGME_SIG_STAT_GOOD_EXP;
break;
case GPG_ERR_KEY_EXPIRED:
*r_stat = GPGME_SIG_STAT_GOOD_EXPKEY;
break;
default:
*r_stat = GPGME_SIG_STAT_ERROR;
break;
}
}
if (r_created)
*r_created = sig->timestamp;
return sig->fpr;
}
/* Retrieve certain attributes of a signature. IDX is the index
number of the signature after a successful verify operation. WHAT
is an attribute where GPGME_ATTR_EXPIRE is probably the most useful
one. WHATIDX is to be passed as 0 for most attributes . */
unsigned long
gpgme_get_sig_ulong_attr (gpgme_ctx_t ctx, int idx,
_gpgme_attr_t what, int whatidx)
{
gpgme_verify_result_t result;
gpgme_signature_t sig;
result = gpgme_op_verify_result (ctx);
sig = result->signatures;
while (sig && idx)
{
sig = sig->next;
idx--;
}
if (!sig || idx)
return 0;
switch (what)
{
case GPGME_ATTR_CREATED:
return sig->timestamp;
case GPGME_ATTR_EXPIRE:
return sig->exp_timestamp;
case GPGME_ATTR_VALIDITY:
return (unsigned long) sig->validity;
case GPGME_ATTR_SIG_STATUS:
switch (gpg_err_code (sig->status))
{
case GPG_ERR_NO_ERROR:
return GPGME_SIG_STAT_GOOD;
case GPG_ERR_BAD_SIGNATURE:
return GPGME_SIG_STAT_BAD;
case GPG_ERR_NO_PUBKEY:
return GPGME_SIG_STAT_NOKEY;
case GPG_ERR_NO_DATA:
return GPGME_SIG_STAT_NOSIG;
case GPG_ERR_SIG_EXPIRED:
return GPGME_SIG_STAT_GOOD_EXP;
case GPG_ERR_KEY_EXPIRED:
return GPGME_SIG_STAT_GOOD_EXPKEY;
default:
return GPGME_SIG_STAT_ERROR;
}
case GPGME_ATTR_SIG_SUMMARY:
return sig->summary;
default:
break;
}
return 0;
}
const char *
gpgme_get_sig_string_attr (gpgme_ctx_t ctx, int idx,
_gpgme_attr_t what, int whatidx)
{
gpgme_verify_result_t result;
gpgme_signature_t sig;
result = gpgme_op_verify_result (ctx);
sig = result->signatures;
while (sig && idx)
{
sig = sig->next;
idx--;
}
if (!sig || idx)
return NULL;
switch (what)
{
case GPGME_ATTR_FPR:
return sig->fpr;
case GPGME_ATTR_ERRTOK:
if (whatidx == 1)
return sig->wrong_key_usage ? "Wrong_Key_Usage" : "";
else
return "";
default:
break;
}
return NULL;
}