diff options
Diffstat (limited to 'src/encrypt.c')
| -rw-r--r-- | src/encrypt.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/src/encrypt.c b/src/encrypt.c new file mode 100644 index 00000000..4744090d --- /dev/null +++ b/src/encrypt.c @@ -0,0 +1,223 @@ +/* encrypt.c - Encrypt 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., 59 Temple Place - Suite 330, Boston, MA + 02111-1307, USA. */ + +#if HAVE_CONFIG_H +#include <config.h> +#endif +#include <stdlib.h> +#include <string.h> +#include <errno.h> + +#include "gpgme.h" +#include "context.h" +#include "ops.h" + + +typedef struct +{ + struct _gpgme_op_encrypt_result result; + + /* A pointer to the next pointer of the last invalid recipient in + the list. This makes appending new invalid recipients painless + while preserving the order. */ + gpgme_invalid_key_t *lastp; +} *op_data_t; + + +static void +release_op_data (void *hook) +{ + op_data_t opd = (op_data_t) hook; + gpgme_invalid_key_t invalid_recipient = opd->result.invalid_recipients; + + while (invalid_recipient) + { + gpgme_invalid_key_t next = invalid_recipient->next; + if (invalid_recipient->fpr) + free (invalid_recipient->fpr); + free (invalid_recipient); + invalid_recipient = next; + } +} + + +gpgme_encrypt_result_t +gpgme_op_encrypt_result (gpgme_ctx_t ctx) +{ + void *hook; + op_data_t opd; + gpgme_error_t err; + + err = _gpgme_op_data_lookup (ctx, OPDATA_ENCRYPT, &hook, -1, NULL); + opd = hook; + + if (err || !opd) + return NULL; + + return &opd->result; +} + + +gpgme_error_t +_gpgme_encrypt_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_op_data_lookup (ctx, OPDATA_ENCRYPT, &hook, -1, NULL); + opd = hook; + if (err) + return err; + + switch (code) + { + case GPGME_STATUS_EOF: + if (opd->result.invalid_recipients) + return gpg_error (GPG_ERR_UNUSABLE_PUBKEY); + break; + + case GPGME_STATUS_INV_RECP: + err = _gpgme_parse_inv_recp (args, opd->lastp); + if (err) + return err; + + opd->lastp = &(*opd->lastp)->next; + break; + + case GPGME_STATUS_NO_RECP: + /* Should not happen, because we require at least one recipient. */ + return gpg_error (GPG_ERR_GENERAL); + + default: + break; + } + return 0; +} + + +static gpgme_error_t +encrypt_sym_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_passphrase_status_handler (priv, code, args); + return err; +} + + +static gpgme_error_t +encrypt_status_handler (void *priv, gpgme_status_code_t code, char *args) +{ + return _gpgme_progress_status_handler (priv, code, args) + || _gpgme_encrypt_status_handler (priv, code, args); +} + + +gpgme_error_t +_gpgme_op_encrypt_init_result (gpgme_ctx_t ctx) +{ + gpgme_error_t err; + void *hook; + op_data_t opd; + + err = _gpgme_op_data_lookup (ctx, OPDATA_ENCRYPT, &hook, sizeof (*opd), + release_op_data); + opd = hook; + if (err) + return err; + + opd->lastp = &opd->result.invalid_recipients; + return 0; +} + + +static gpgme_error_t +encrypt_start (gpgme_ctx_t ctx, int synchronous, gpgme_key_t recp[], + gpgme_encrypt_flags_t flags, + gpgme_data_t plain, gpgme_data_t cipher) +{ + gpgme_error_t err; + int symmetric = 0; + + err = _gpgme_op_reset (ctx, synchronous); + if (err) + return err; + + err = _gpgme_op_encrypt_init_result (ctx); + if (err) + return err; + + if (!recp) + symmetric = 1; + + if (!plain) + return gpg_error (GPG_ERR_NO_DATA); + if (!cipher) + return gpg_error (GPG_ERR_INV_VALUE); + if (recp && ! *recp) + return gpg_error (GPG_ERR_INV_VALUE); + + if (symmetric && ctx->passphrase_cb) + { + /* Symmetric encryption requires a passphrase. */ + 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, + symmetric + ? encrypt_sym_status_handler + : encrypt_status_handler, + ctx); + + return _gpgme_engine_op_encrypt (ctx->engine, recp, flags, plain, cipher, + ctx->use_armor); +} + + +gpgme_error_t +gpgme_op_encrypt_start (gpgme_ctx_t ctx, gpgme_key_t recp[], + gpgme_encrypt_flags_t flags, + gpgme_data_t plain, gpgme_data_t cipher) +{ + return encrypt_start (ctx, 0, recp, flags, plain, cipher); +} + + +/* Encrypt plaintext PLAIN within CTX for the recipients RECP and + store the resulting ciphertext in CIPHER. */ +gpgme_error_t +gpgme_op_encrypt (gpgme_ctx_t ctx, gpgme_key_t recp[], + gpgme_encrypt_flags_t flags, + gpgme_data_t plain, gpgme_data_t cipher) +{ + gpgme_error_t err = encrypt_start (ctx, 1, recp, flags, plain, cipher); + if (!err) + err = _gpgme_wait_one (ctx); + return err; +} |