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Diffstat (limited to 'src/tofupolicy.c')
| -rw-r--r-- | src/tofupolicy.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/tofupolicy.c b/src/tofupolicy.c new file mode 100644 index 00000000..799779e5 --- /dev/null +++ b/src/tofupolicy.c @@ -0,0 +1,184 @@ +/* tofupolicy.c - Tofu policy helpers. + * Copyright (C) 2016 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, see <http://www.gnu.org/licenses/>. + */ + +#if HAVE_CONFIG_H +#include <config.h> +#endif +#include <stdlib.h> + +#include "gpgme.h" +#include "debug.h" +#include "context.h" +#include "ops.h" + + +typedef struct +{ + /* The error code from a FAILURE status line or 0. */ + gpg_error_t failure_code; + + /* The error code from an ERROR status line or 0. */ + gpg_error_t error_code; + +} *op_data_t; + + + +/* Parse an error status line. Return the error location and the + error code. The function may modify ARGS. */ +static char * +parse_error (char *args, gpg_error_t *r_err) +{ + char *where = strchr (args, ' '); + char *which; + + if (where) + { + *where = '\0'; + which = where + 1; + + where = strchr (which, ' '); + if (where) + *where = '\0'; + + where = args; + } + else + { + *r_err = trace_gpg_error (GPG_ERR_INV_ENGINE); + return NULL; + } + + *r_err = atoi (which); + + return where; +} + + +static gpgme_error_t +tofu_policy_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; + char *loc; + + err = _gpgme_op_data_lookup (ctx, OPDATA_TOFU_POLICY, &hook, -1, NULL); + opd = hook; + if (err) + return err; + + switch (code) + { + case GPGME_STATUS_ERROR: + loc = parse_error (args, &err); + if (!loc) + return err; + if (!opd->error_code) + opd->error_code = err; + break; + + case GPGME_STATUS_FAILURE: + opd->failure_code = _gpgme_parse_failure (args); + break; + + case GPGME_STATUS_EOF: + if (opd->error_code) + err = opd->error_code; + else if (opd->failure_code) + err = opd->failure_code; + break; + + default: + break; + } + + return err; +} + + +/* Set the TOFU policy for KEY to POLICY. */ +static gpgme_error_t +tofu_policy_start (gpgme_ctx_t ctx, int synchronous, + gpgme_key_t key, gpgme_tofu_policy_t policy) +{ + gpgme_error_t err; + void *hook; + op_data_t opd; + + if (ctx->protocol != GPGME_PROTOCOL_OPENPGP) + return gpgme_error (GPG_ERR_UNSUPPORTED_PROTOCOL); + + if (!key) + return gpg_error (GPG_ERR_INV_VALUE); + + err = _gpgme_op_reset (ctx, synchronous); + if (err) + return err; + + err = _gpgme_op_data_lookup (ctx, OPDATA_TOFU_POLICY, &hook, + sizeof (*opd), NULL); + opd = hook; + if (err) + return err; + + _gpgme_engine_set_status_handler (ctx->engine, tofu_policy_status_handler, + ctx); + + return _gpgme_engine_op_tofu_policy (ctx->engine, key, policy); +} + + + +/* Set the TOFU policy of KEY to POLCIY. This is the asynchronous + * variant. */ +gpgme_error_t +gpgme_op_tofu_policy_start (gpgme_ctx_t ctx, + gpgme_key_t key, gpgme_tofu_policy_t policy) +{ + gpg_error_t err; + TRACE_BEG2 (DEBUG_CTX, "gpgme_op_tofu_policy_start", ctx, + "key=%p, policy=%u", key, (unsigned int)policy); + + if (!ctx) + return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE)); + + err = tofu_policy_start (ctx, 0, key, policy); + return TRACE_ERR (err); +} + + +/* This is the synchronous variant of gpgme_op_tofu_policy_start. */ +gpgme_error_t +gpgme_op_tofu_policy (gpgme_ctx_t ctx, + gpgme_key_t key, gpgme_tofu_policy_t policy) +{ + gpgme_error_t err; + TRACE_BEG2 (DEBUG_CTX, "gpgme_op_tofu_policy", ctx, + "key=%p, policy=%u", key, (unsigned int)policy); + + if (!ctx) + return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE)); + + err = tofu_policy_start (ctx, 1, key, policy); + if (!err) + err = _gpgme_wait_one (ctx); + return TRACE_ERR (err); +} |