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Diffstat (limited to 'src/mint-lib/mint_api_wire.c')
-rw-r--r--src/mint-lib/mint_api_wire.c620
1 files changed, 0 insertions, 620 deletions
diff --git a/src/mint-lib/mint_api_wire.c b/src/mint-lib/mint_api_wire.c
deleted file mode 100644
index 0947354ad..000000000
--- a/src/mint-lib/mint_api_wire.c
+++ /dev/null
@@ -1,620 +0,0 @@
-/*
- This file is part of TALER
- Copyright (C) 2014, 2015 GNUnet e.V.
-
- TALER 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, or (at your option) any later version.
-
- TALER 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
- TALER; see the file COPYING. If not, If not, see
- <http://www.gnu.org/licenses/>
-*/
-/**
- * @file mint-lib/mint_api_wire.c
- * @brief Implementation of the /wire request of the mint's HTTP API
- * @author Christian Grothoff
- */
-#include "platform.h"
-#include <curl/curl.h>
-#include <jansson.h>
-#include <microhttpd.h> /* just for HTTP status codes */
-#include <gnunet/gnunet_util_lib.h>
-#include "taler_mint_service.h"
-#include "mint_api_common.h"
-#include "mint_api_json.h"
-#include "mint_api_context.h"
-#include "mint_api_handle.h"
-#include "taler_signatures.h"
-
-
-/**
- * @brief A Wire Handle
- */
-struct TALER_MINT_WireHandle
-{
-
- /**
- * The connection to mint this request handle will use
- */
- struct TALER_MINT_Handle *mint;
-
- /**
- * The url for this request.
- */
- char *url;
-
- /**
- * Handle for the request.
- */
- struct MAC_Job *job;
-
- /**
- * Function to call with the result.
- */
- TALER_MINT_WireResultCallback cb;
-
- /**
- * Closure for @a cb.
- */
- void *cb_cls;
-
- /**
- * Download buffer
- */
- struct MAC_DownloadBuffer db;
-
- /**
- * Set to the "methods" JSON array returned by the
- * /wire request.
- */
- json_t *methods;
-
- /**
- * Current iteration offset in the @e methods array.
- */
- unsigned int methods_off;
-
-};
-
-
-/**
- * Verify that the signature on the "200 OK" response
- * for /wire/sepa from the mint is valid.
- *
- * @param wh wire handle
- * @param json json reply with the signature
- * @return #GNUNET_SYSERR if @a json is invalid,
- * #GNUNET_NO if the method is unknown,
- * #GNUNET_OK if the json is valid
- */
-static int
-verify_wire_sepa_signature_ok (const struct TALER_MINT_WireHandle *wh,
- json_t *json)
-{
- struct TALER_MasterSignatureP mint_sig;
- struct TALER_MasterWireSepaDetailsPS mp;
- const char *receiver_name;
- const char *iban;
- const char *bic;
- const struct TALER_MINT_Keys *key_state;
- struct GNUNET_HashContext *hc;
- struct MAJ_Specification spec[] = {
- MAJ_spec_fixed_auto ("sig", &mint_sig),
- MAJ_spec_string ("receiver_name", &receiver_name),
- MAJ_spec_string ("iban", &iban),
- MAJ_spec_string ("bic", &bic),
- MAJ_spec_end
- };
-
- if (GNUNET_OK !=
- MAJ_parse_json (json,
- spec))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
-
- key_state = TALER_MINT_get_keys (wh->mint);
- mp.purpose.purpose = htonl (TALER_SIGNATURE_MASTER_SEPA_DETAILS);
- mp.purpose.size = htonl (sizeof (struct TALER_MasterWireSepaDetailsPS));
- hc = GNUNET_CRYPTO_hash_context_start ();
- GNUNET_CRYPTO_hash_context_read (hc,
- receiver_name,
- strlen (receiver_name) + 1);
- GNUNET_CRYPTO_hash_context_read (hc,
- iban,
- strlen (iban) + 1);
- GNUNET_CRYPTO_hash_context_read (hc,
- bic,
- strlen (bic) + 1);
- GNUNET_CRYPTO_hash_context_finish (hc,
- &mp.h_sepa_details);
-
- if (GNUNET_OK !=
- GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_SEPA_DETAILS,
- &mp.purpose,
- &mint_sig.eddsa_signature,
- &key_state->master_pub.eddsa_pub))
- {
- GNUNET_break_op (0);
- MAJ_parse_free (spec);
- return GNUNET_SYSERR;
- }
- MAJ_parse_free (spec);
- return GNUNET_OK;
-}
-
-
-/**
- * Verify that the signature on the "200 OK" response
- * for /wire/METHOD from the mint is valid.
- *
- * @param wh wire handle with key material
- * @param method method to verify the reply for
- * @param json json reply with the signature
- * @return #GNUNET_SYSERR if @a json is invalid,
- * #GNUNET_NO if the method is unknown,
- * #GNUNET_OK if the json is valid
- */
-static int
-verify_wire_method_signature_ok (const struct TALER_MINT_WireHandle *wh,
- const char *method,
- json_t *json)
-{
- struct
- {
- /**
- * Name fo the method.
- */
- const char *method;
-
- /**
- * Handler to invoke to verify signature.
- *
- * @param wh wire handle with key material
- * @param json json reply with signature to verify
- */
- int (*handler)(const struct TALER_MINT_WireHandle *wh,
- json_t *json);
- } handlers[] = {
- { "sepa", &verify_wire_sepa_signature_ok },
- { NULL, NULL }
- };
- unsigned int i;
-
- for (i=0;NULL != handlers[i].method; i++)
- if (0 == strcasecmp (handlers[i].method,
- method))
- return handlers[i].handler (wh,
- json);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "Wire transfer method `%s' not supported\n",
- method);
- return GNUNET_NO;
-}
-
-
-/**
- * Perform the next /wire/method request or signal
- * the end of the iteration.
- *
- * @param wh the wire handle
- * @return a handle for this request
- */
-static void
-request_wire_method (struct TALER_MINT_WireHandle *wh);
-
-
-/**
- * Function called when we're done processing the
- * HTTP /wire/METHOD request.
- *
- * @param cls the `struct TALER_MINT_WireHandle`
- * @param eh the curl request handle
- */
-static void
-handle_wire_method_finished (void *cls,
- CURL *eh)
-{
- struct TALER_MINT_WireHandle *wh = cls;
- long response_code;
- json_t *json;
-
- wh->job = NULL;
- json = MAC_download_get_result (&wh->db,
- eh,
- &response_code);
- switch (response_code)
- {
- case 0:
- break;
- case MHD_HTTP_OK:
- {
- const char *method;
-
- method = json_string_value (json_array_get (wh->methods,
- wh->methods_off - 1));
- if (GNUNET_OK !=
- verify_wire_method_signature_ok (wh,
- method,
- json))
- {
- GNUNET_break_op (0);
- response_code = 0;
- break;
- }
- break;
- }
- case MHD_HTTP_FOUND:
- /* /wire/test returns a 302 redirect, we should just give
- this information back to the callback below */
- break;
- case MHD_HTTP_BAD_REQUEST:
- /* This should never happen, either us or the mint is buggy
- (or API version conflict); just pass JSON reply to the application */
- break;
- case MHD_HTTP_NOT_FOUND:
- /* Nothing really to verify, this should never
- happen, we should pass the JSON reply to the application */
- break;
- case MHD_HTTP_INTERNAL_SERVER_ERROR:
- /* Server had an internal issue; we should retry, but this API
- leaves this to the application */
- break;
- default:
- /* unexpected response code */
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "Unexpected response code %u\n",
- response_code);
- GNUNET_break (0);
- response_code = 0;
- break;
- }
- if (0 == response_code)
- {
- /* signal end of iteration */
- wh->cb (wh->cb_cls,
- 0,
- NULL,
- NULL);
- json_decref (json);
- TALER_MINT_wire_cancel (wh);
- return;
- }
- /* pass on successful reply */
- wh->cb (wh->cb_cls,
- response_code,
- json_string_value (json_array_get (wh->methods,
- wh->methods_off-1)),
- json);
- /* trigger request for the next /wire/method */
- request_wire_method (wh);
-}
-
-
-/**
- * Perform the next /wire/method request or signal
- * the end of the iteration.
- *
- * @param wh the wire handle
- * @return a handle for this request
- */
-static void
-request_wire_method (struct TALER_MINT_WireHandle *wh)
-{
- struct TALER_MINT_Context *ctx;
- CURL *eh;
- char *path;
-
- if (json_array_size (wh->methods) <= wh->methods_off)
- {
- /* we are done, signal end of iteration */
- wh->cb (wh->cb_cls,
- 0,
- NULL,
- NULL);
- TALER_MINT_wire_cancel (wh);
- return;
- }
- GNUNET_free_non_null (wh->db.buf);
- wh->db.buf = NULL;
- wh->db.buf_size = 0;
- wh->db.eno = 0;
- GNUNET_free_non_null (wh->url);
- GNUNET_asprintf (&path,
- "/wire/%s",
- json_string_value (json_array_get (wh->methods,
- wh->methods_off++)));
- wh->url = MAH_path_to_url (wh->mint,
- path);
- GNUNET_free (path);
-
- eh = curl_easy_init ();
- GNUNET_assert (CURLE_OK ==
- curl_easy_setopt (eh,
- CURLOPT_URL,
- wh->url));
- GNUNET_assert (CURLE_OK ==
- curl_easy_setopt (eh,
- CURLOPT_WRITEFUNCTION,
- &MAC_download_cb));
- GNUNET_assert (CURLE_OK ==
- curl_easy_setopt (eh,
- CURLOPT_WRITEDATA,
- &wh->db));
- /* The default is 'disabled', but let's be sure */
- GNUNET_assert (CURLE_OK ==
- curl_easy_setopt (eh,
- CURLOPT_FOLLOWLOCATION,
- (long) 0));
- ctx = MAH_handle_to_context (wh->mint);
- wh->job = MAC_job_add (ctx,
- eh,
- GNUNET_YES,
- &handle_wire_method_finished,
- wh);
- TALER_MINT_perform (ctx);
-}
-
-
-/**
- * Verify that the signature on the "200 OK" response
- * for /wire from the mint is valid.
- *
- * @param wh wire handle
- * @param json json reply with the signature
- * @return NULL if @a json is invalid, otherwise the
- * "methods" array (with an RC of 1)
- */
-static json_t *
-verify_wire_signature_ok (const struct TALER_MINT_WireHandle *wh,
- json_t *json)
-{
- struct TALER_MintSignatureP mint_sig;
- struct TALER_MintPublicKeyP mint_pub;
- struct TALER_MintWireSupportMethodsPS mp;
- json_t *methods;
- const struct TALER_MINT_Keys *key_state;
- struct GNUNET_HashContext *hc;
- struct MAJ_Specification spec[] = {
- MAJ_spec_fixed_auto ("sig", &mint_sig),
- MAJ_spec_fixed_auto ("pub", &mint_pub),
- MAJ_spec_json ("methods", &methods),
- MAJ_spec_end
- };
- unsigned int i;
-
- if (GNUNET_OK !=
- MAJ_parse_json (json,
- spec))
- {
- GNUNET_break_op (0);
- return NULL;
- }
- if (! json_is_array (methods))
- {
- GNUNET_break_op (0);
- MAJ_parse_free (spec);
- return NULL;
- }
-
- key_state = TALER_MINT_get_keys (wh->mint);
- if (GNUNET_OK !=
- TALER_MINT_test_signing_key (key_state,
- &mint_pub))
- {
- GNUNET_break_op (0);
- return NULL;
- }
- hc = GNUNET_CRYPTO_hash_context_start ();
- for (i=0;i<json_array_size (methods);i++)
- {
- const json_t *element = json_array_get (methods, i);
- const char *method;
-
- if (! json_is_string (element))
- {
- GNUNET_CRYPTO_hash_context_abort (hc);
- GNUNET_break_op (0);
- MAJ_parse_free (spec);
- return NULL;
- }
- method = json_string_value (element);
- GNUNET_CRYPTO_hash_context_read (hc,
- method,
- strlen (method) + 1);
- }
- mp.purpose.purpose = htonl (TALER_SIGNATURE_MINT_WIRE_TYPES);
- mp.purpose.size = htonl (sizeof (struct TALER_MintWireSupportMethodsPS));
- GNUNET_CRYPTO_hash_context_finish (hc,
- &mp.h_wire_types);
-
- if (GNUNET_OK !=
- GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MINT_WIRE_TYPES,
- &mp.purpose,
- &mint_sig.eddsa_signature,
- &mint_pub.eddsa_pub))
- {
- GNUNET_break_op (0);
- MAJ_parse_free (spec);
- return NULL;
- }
- return methods;
-}
-
-
-/**
- * Function called when we're done processing the
- * HTTP /wire request.
- *
- * @param cls the `struct TALER_MINT_WireHandle`
- * @param eh the curl request handle
- */
-static void
-handle_wire_finished (void *cls,
- CURL *eh)
-{
- struct TALER_MINT_WireHandle *wh = cls;
- long response_code;
- json_t *json;
-
- wh->job = NULL;
- json = MAC_download_get_result (&wh->db,
- eh,
- &response_code);
- switch (response_code)
- {
- case 0:
- break;
- case MHD_HTTP_OK:
- {
- json_t *methods;
-
- if (NULL ==
- (methods = verify_wire_signature_ok (wh,
- json)))
- {
- GNUNET_break_op (0);
- response_code = 0;
- break;
- }
- wh->methods = methods;
- request_wire_method (wh);
- return;
- }
- break;
- case MHD_HTTP_BAD_REQUEST:
- /* This should never happen, either us or the mint is buggy
- (or API version conflict); just pass JSON reply to the application */
- break;
- case MHD_HTTP_NOT_FOUND:
- /* Nothing really to verify, this should never
- happen, we should pass the JSON reply to the application */
- break;
- case MHD_HTTP_INTERNAL_SERVER_ERROR:
- /* Server had an internal issue; we should retry, but this API
- leaves this to the application */
- break;
- default:
- /* unexpected response code */
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "Unexpected response code %u\n",
- response_code);
- GNUNET_break (0);
- response_code = 0;
- break;
- }
- if (0 != response_code)
- {
- /* pass on successful reply */
- wh->cb (wh->cb_cls,
- response_code,
- NULL,
- json);
- }
- /* signal end of iteration */
- wh->cb (wh->cb_cls,
- 0,
- NULL,
- NULL);
- if (NULL != json)
- json_decref (json);
- TALER_MINT_wire_cancel (wh);
-}
-
-
-/**
- * Obtain information about a mint's wire instructions.
- * A mint may provide wire instructions for creating
- * a reserve. The wire instructions also indicate
- * which wire formats merchants may use with the mint.
- * This API is typically used by a wallet for wiring
- * funds, and possibly by a merchant to determine
- * supported wire formats.
- *
- * Note that while we return the (main) response verbatim to the
- * caller for further processing, we do already verify that the
- * response is well-formed (i.e. that signatures included in the
- * response are all valid). If the mint's reply is not well-formed,
- * we return an HTTP status code of zero to @a cb.
- *
- * @param mint the mint handle; the mint must be ready to operate
- * @param wire_cb the callback to call when a reply for this request is available
- * @param wire_cb_cls closure for the above callback
- * @return a handle for this request
- */
-struct TALER_MINT_WireHandle *
-TALER_MINT_wire (struct TALER_MINT_Handle *mint,
- TALER_MINT_WireResultCallback wire_cb,
- void *wire_cb_cls)
-{
- struct TALER_MINT_WireHandle *wh;
- struct TALER_MINT_Context *ctx;
- CURL *eh;
-
- if (GNUNET_YES !=
- MAH_handle_is_ready (mint))
- {
- GNUNET_break (0);
- return NULL;
- }
- wh = GNUNET_new (struct TALER_MINT_WireHandle);
- wh->mint = mint;
- wh->cb = wire_cb;
- wh->cb_cls = wire_cb_cls;
- wh->url = MAH_path_to_url (mint, "/wire");
-
- eh = curl_easy_init ();
- GNUNET_assert (CURLE_OK ==
- curl_easy_setopt (eh,
- CURLOPT_URL,
- wh->url));
- GNUNET_assert (CURLE_OK ==
- curl_easy_setopt (eh,
- CURLOPT_WRITEFUNCTION,
- &MAC_download_cb));
- GNUNET_assert (CURLE_OK ==
- curl_easy_setopt (eh,
- CURLOPT_WRITEDATA,
- &wh->db));
- ctx = MAH_handle_to_context (mint);
- wh->job = MAC_job_add (ctx,
- eh,
- GNUNET_YES,
- &handle_wire_finished,
- wh);
- return wh;
-}
-
-
-/**
- * Cancel a wire information request. This function cannot be used
- * on a request handle if a response is already served for it.
- *
- * @param wh the wire information request handle
- */
-void
-TALER_MINT_wire_cancel (struct TALER_MINT_WireHandle *wh)
-{
- if (NULL != wh->job)
- {
- MAC_job_cancel (wh->job);
- wh->job = NULL;
- }
- if (NULL != wh->methods)
- {
- json_decref (wh->methods);
- wh->methods = NULL;
- }
- GNUNET_free_non_null (wh->db.buf);
- GNUNET_free (wh->url);
- GNUNET_free (wh);
-}
-
-
-/* end of mint_api_wire.c */