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-rw-r--r--libtdenetwork/libgpgme-copy/gpgme/decrypt.c340
1 files changed, 340 insertions, 0 deletions
diff --git a/libtdenetwork/libgpgme-copy/gpgme/decrypt.c b/libtdenetwork/libgpgme-copy/gpgme/decrypt.c
new file mode 100644
index 00000000..8d93239e
--- /dev/null
+++ b/libtdenetwork/libgpgme-copy/gpgme/decrypt.c
@@ -0,0 +1,340 @@
+/* decrypt.c - Decrypt function.
+ Copyright (C) 2000 Werner Koch (dd9jn)
+ Copyright (C) 2001, 2002, 2003, 2004 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 "gpgme.h"
+#include "util.h"
+#include "context.h"
+#include "ops.h"
+
+
+typedef struct
+{
+ struct _gpgme_op_decrypt_result result;
+
+ int okay;
+ int failed;
+
+ /* A pointer to the next pointer of the last recipient in the list.
+ This makes appending new invalid signers painless while
+ preserving the order. */
+ gpgme_recipient_t *last_recipient_p;
+} *op_data_t;
+
+
+static void
+release_op_data (void *hook)
+{
+ op_data_t opd = (op_data_t) hook;
+
+ if (opd->result.unsupported_algorithm)
+ free (opd->result.unsupported_algorithm);
+
+ if (opd->result.file_name)
+ free (opd->result.file_name);
+}
+
+
+gpgme_decrypt_result_t
+gpgme_op_decrypt_result (gpgme_ctx_t ctx)
+{
+ void *hook;
+ op_data_t opd;
+ gpgme_error_t err;
+
+ err = _gpgme_op_data_lookup (ctx, OPDATA_DECRYPT, &hook, -1, NULL);
+ opd = hook;
+ if (err || !opd)
+ return NULL;
+
+ return &opd->result;
+}
+
+
+static gpgme_error_t
+parse_enc_to (char *args, gpgme_recipient_t *recp)
+{
+ gpgme_recipient_t rec;
+ char *tail;
+ int i;
+
+ rec = malloc (sizeof (*rec));
+ if (!rec)
+ return gpg_error_from_errno (errno);
+
+ rec->next = NULL;
+ rec->keyid = rec->_keyid;
+ rec->status = 0;
+
+ for (i = 0; i < sizeof (rec->_keyid) - 1; i++)
+ {
+ if (args[i] == '\0' || args[i] == ' ')
+ break;
+
+ rec->_keyid[i] = args[i];
+ }
+ rec->_keyid[i] = '\0';
+
+ args = &args[i];
+ if (*args != '\0' && *args != ' ')
+ {
+ free (rec);
+ return gpg_error (GPG_ERR_INV_ENGINE);
+ }
+
+ while (*args == ' ')
+ args++;
+
+ if (*args)
+ {
+ errno = 0;
+ rec->pubkey_algo = strtol (args, &tail, 0);
+ if (errno || args == tail || *tail != ' ')
+ {
+ /* The crypto backend does not behave. */
+ free (rec);
+ return gpg_error (GPG_ERR_INV_ENGINE);
+ }
+ }
+
+ /* FIXME: The key length is always 0 right now, so no need to parse
+ it. */
+
+ *recp = rec;
+ return 0;
+}
+
+
+gpgme_error_t
+_gpgme_decrypt_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;
+
+ err = _gpgme_passphrase_status_handler (priv, code, args);
+ if (err)
+ return err;
+
+ err = _gpgme_op_data_lookup (ctx, OPDATA_DECRYPT, &hook, -1, NULL);
+ opd = hook;
+ if (err)
+ return err;
+
+ switch (code)
+ {
+ case GPGME_STATUS_EOF:
+ /* FIXME: These error values should probably be attributed to
+ the underlying crypto engine (as error source). */
+ if (opd->failed)
+ return gpg_error (GPG_ERR_DECRYPT_FAILED);
+ else if (!opd->okay)
+ return gpg_error (GPG_ERR_NO_DATA);
+ break;
+
+ case GPGME_STATUS_DECRYPTION_OKAY:
+ opd->okay = 1;
+ break;
+
+ case GPGME_STATUS_DECRYPTION_FAILED:
+ opd->failed = 1;
+ break;
+
+ case GPGME_STATUS_ERROR:
+ /* Note that this is an informational status code which should
+ not lead to an error return unless it is something not
+ related to the backend. */
+ {
+ const char d_alg[] = "decrypt.algorithm";
+ const char u_alg[] = "Unsupported_Algorithm";
+ const char k_alg[] = "decrypt.keyusage";
+
+ if (!strncmp (args, d_alg, sizeof (d_alg) - 1))
+ {
+ args += sizeof (d_alg) - 1;
+ while (*args == ' ')
+ args++;
+
+ if (!strncmp (args, u_alg, sizeof (u_alg) - 1))
+ {
+ char *end;
+
+ args += sizeof (u_alg) - 1;
+ while (*args == ' ')
+ args++;
+
+ end = strchr (args, ' ');
+ if (end)
+ *end = '\0';
+
+ if (!(*args == '?' && *(args + 1) == '\0'))
+ {
+ opd->result.unsupported_algorithm = strdup (args);
+ if (!opd->result.unsupported_algorithm)
+ return gpg_error_from_errno (errno);
+ }
+ }
+ }
+ else if (!strncmp (args, k_alg, sizeof (k_alg) - 1))
+ {
+ args += sizeof (k_alg) - 1;
+ while (*args == ' ')
+ args++;
+
+ err = _gpgme_map_gnupg_error (args);
+ if (gpg_err_code (err) == GPG_ERR_WRONG_KEY_USAGE)
+ opd->result.wrong_key_usage = 1;
+ }
+ }
+ break;
+
+ case GPGME_STATUS_ENC_TO:
+ err = parse_enc_to (args, opd->last_recipient_p);
+ if (err)
+ return err;
+
+ opd->last_recipient_p = &(*opd->last_recipient_p)->next;
+ break;
+
+ case GPGME_STATUS_NO_SECKEY:
+ {
+ gpgme_recipient_t rec = opd->result.recipients;
+
+ while (rec)
+ {
+ if (!strcmp (rec->keyid, args))
+ {
+ rec->status = gpg_error (GPG_ERR_NO_SECKEY);
+ break;
+ }
+ rec = rec->next;
+ }
+ /* FIXME: Is this ok? */
+ if (!rec)
+ return gpg_error (GPG_ERR_INV_ENGINE);
+ }
+ break;
+
+ case GPGME_STATUS_PLAINTEXT:
+ err = _gpgme_parse_plaintext (args, &opd->result.file_name);
+ if (err)
+ return err;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+
+static gpgme_error_t
+decrypt_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_decrypt_status_handler (priv, code, args);
+ return err;
+}
+
+
+gpgme_error_t
+_gpgme_op_decrypt_init_result (gpgme_ctx_t ctx)
+{
+ gpgme_error_t err;
+ void *hook;
+ op_data_t opd;
+
+ err = _gpgme_op_data_lookup (ctx, OPDATA_DECRYPT, &hook,
+ sizeof (*opd), release_op_data);
+ opd = hook;
+ if (err)
+ return err;
+
+ opd->last_recipient_p = &opd->result.recipients;
+ return 0;
+}
+
+
+static gpgme_error_t
+decrypt_start (gpgme_ctx_t ctx, int synchronous,
+ gpgme_data_t cipher, gpgme_data_t plain)
+{
+ gpgme_error_t err;
+
+ err = _gpgme_op_reset (ctx, synchronous);
+ if (err)
+ return err;
+
+ err = _gpgme_op_decrypt_init_result (ctx);
+ if (err)
+ return err;
+
+ if (!cipher)
+ return gpg_error (GPG_ERR_NO_DATA);
+ if (!plain)
+ return gpg_error (GPG_ERR_INV_VALUE);
+
+ if (err)
+ return err;
+
+ if (ctx->passphrase_cb)
+ {
+ err = _gpgme_engine_set_command_handler
+ (ctx->engine, _gpgme_passphrase_command_handler, ctx, NULL);
+ if (err)
+ return err;
+ }
+
+ _gpgme_engine_set_status_handler (ctx->engine, decrypt_status_handler, ctx);
+
+ return _gpgme_engine_op_decrypt (ctx->engine, cipher, plain);
+}
+
+
+gpgme_error_t
+gpgme_op_decrypt_start (gpgme_ctx_t ctx, gpgme_data_t cipher,
+ gpgme_data_t plain)
+{
+ return decrypt_start (ctx, 0, cipher, plain);
+}
+
+
+/* Decrypt ciphertext CIPHER within CTX and store the resulting
+ plaintext in PLAIN. */
+gpgme_error_t
+gpgme_op_decrypt (gpgme_ctx_t ctx, gpgme_data_t cipher, gpgme_data_t plain)
+{
+ gpgme_error_t err = decrypt_start (ctx, 1, cipher, plain);
+ if (!err)
+ err = _gpgme_wait_one (ctx);
+ return err;
+}
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