commit 519830a70a915020becc664333ccce1fd905ef24
parent 985d7d8c7aacbda8332cfc3e1e02ca0d354dca95
Author: Christian Grothoff <christian@grothoff.org>
Date: Sun, 23 Jun 2024 22:14:07 +0200
get AML measures skeleton"
Diffstat:
2 files changed, 493 insertions(+), 0 deletions(-)
diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am
@@ -36,6 +36,7 @@ libtalerexchange_la_SOURCES = \
exchange_api_csr_withdraw.c \
exchange_api_handle.c exchange_api_handle.h \
exchange_api_deposits_get.c \
+ exchange_api_get_aml_measures.c \
exchange_api_kyc_check.c \
exchange_api_kyc_proof.c \
exchange_api_kyc_wallet.c \
diff --git a/src/lib/exchange_api_get_aml_measures.c b/src/lib/exchange_api_get_aml_measures.c
@@ -0,0 +1,492 @@
+/*
+ This file is part of TALER
+ Copyright (C) 2023, 2024 Taler Systems SA
+
+ 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, see
+ <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file lib/exchange_api_get_aml_measures.c
+ * @brief Implementation of the GET /aml/$OFFICER_PUB/measures request
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <microhttpd.h> /* just for HTTP status codes */
+#include <gnunet/gnunet_util_lib.h>
+#include <gnunet/gnunet_curl_lib.h>
+#include "taler_exchange_service.h"
+#include "taler_json_lib.h"
+#include "exchange_api_handle.h"
+#include "taler_signatures.h"
+#include "exchange_api_curl_defaults.h"
+
+
+/**
+ * @brief A GET /aml/$OFFICER_PUB/measures Handle
+ */
+struct TALER_EXCHANGE_AmlGetMeasuresHandle
+{
+
+ /**
+ * The url for this request.
+ */
+ char *url;
+
+ /**
+ * Handle for the request.
+ */
+ struct GNUNET_CURL_Job *job;
+
+ /**
+ * Function to call with the result.
+ */
+ TALER_EXCHANGE_AmlMeasuresCallback measures_cb;
+
+ /**
+ * Closure for @e measures_cb.
+ */
+ void *measures_cb_cls;
+
+ /**
+ * HTTP headers for the job.
+ */
+ struct curl_slist *job_headers;
+
+};
+
+
+/**
+ * Parse AML measures.
+ *
+ * @param jroots JSON object with measure data
+ * @param[out] roots where to write the result
+ * @return #GNUNET_OK on success
+ */
+static enum GNUNET_GenericReturnValue
+parse_aml_roots (
+ const json_t *jroots,
+ struct TALER_EXCHANGE_AvailableAmlMeasures *roots)
+{
+ const json_t *obj;
+ const char *name;
+ size_t idx = 0;
+
+ json_object_foreach ((json_t *) jroots, name, obj)
+ {
+ struct TALER_EXCHANGE_AvailableAmlMeasures *root
+ = &roots[idx++];
+ struct GNUNET_JSON_Specification spec[] = {
+ GNUNET_JSON_spec_string ("check_name",
+ &root->check_name),
+ GNUNET_JSON_spec_string ("prog_name",
+ &root->prog_name),
+ GNUNET_JSON_spec_mark_optional (
+ GNUNET_JSON_spec_object_const ("context",
+ &root->context),
+ NULL),
+ GNUNET_JSON_spec_end ()
+ };
+
+ if (GNUNET_OK !=
+ GNUNET_JSON_parse (obj,
+ spec,
+ NULL,
+ NULL))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ root->measure_name = name;
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Parse AML programs.
+ *
+ * @param[in,out] lh context for allocations
+ * @param jroots JSON object with program data
+ * @param[out] roots where to write the result
+ * @return #GNUNET_OK on success
+ */
+static enum GNUNET_GenericReturnValue
+parse_aml_programs (
+ struct TALER_EXCHANGE_AmlGetMeasuresHandle *lh,
+ const json_t *jprogs,
+ struct TALER_EXCHANGE_AvailableAmlPrograms *progs)
+{
+ const json_t *obj;
+ const char *name;
+ size_t idx = 0;
+
+ json_object_foreach ((json_t *) jprogs, name, obj)
+ {
+ struct TALER_EXCHANGE_AvailableAmlPrograms *prog
+ = &progs[idx++];
+ const json_t *jcontext;
+ const json_t *jinputs;
+ struct GNUNET_JSON_Specification spec[] = {
+ GNUNET_JSON_spec_string ("description",
+ &prog->description),
+ GNUNET_JSON_spec_array_const ("context",
+ &jcontext),
+ GNUNET_JSON_spec_array_const ("inputs",
+ &jinputs),
+ GNUNET_JSON_spec_end ()
+ };
+
+ if (GNUNET_OK !=
+ GNUNET_JSON_parse (obj,
+ spec,
+ NULL,
+ NULL))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ prog->prog_name = name;
+ // FIXME: do something with jcontext + jinputs!
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Parse AML measures.
+ *
+ * @param[in,out] lh context for allocations
+ * @param jchecks JSON object with measure data
+ * @param[out] checks where to write the result
+ * @return #GNUNET_OK on success
+ */
+static enum GNUNET_GenericReturnValue
+parse_aml_checks (
+ struct TALER_EXCHANGE_AmlGetMeasuresHandle *lh,
+ const json_t *jchecks,
+ struct TALER_EXCHANGE_AvailableKycChecks *checks)
+{
+ const json_t *obj;
+ const char *name;
+ size_t idx = 0;
+
+ json_object_foreach ((json_t *) jchecks, name, obj)
+ {
+ struct TALER_EXCHANGE_AvailableKycChecks *check
+ = &checks[idx++];
+ const json_t *jrequires;
+ const json_t *joutputs;
+ struct GNUNET_JSON_Specification spec[] = {
+ GNUNET_JSON_spec_string ("description",
+ &check->description),
+ GNUNET_JSON_spec_mark_optional (
+ GNUNET_JSON_spec_object_const ("description_i18n",
+ &check->description_i18n),
+ NULL),
+ GNUNET_JSON_spec_array_const ("requires",
+ &jrequires),
+ GNUNET_JSON_spec_array_const ("outputs",
+ &joutputs),
+ GNUNET_JSON_spec_string ("fallback",
+ &check->fallback),
+ GNUNET_JSON_spec_end ()
+ };
+
+ if (GNUNET_OK !=
+ GNUNET_JSON_parse (obj,
+ spec,
+ NULL,
+ NULL))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ check->check_name = name;
+ // FIXME: do somethign with jrequires / joutputs!
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Parse the provided decision data from the "200 OK" response.
+ *
+ * @param[in,out] lh handle (callback may be zero'ed out)
+ * @param json json reply with the data for one coin
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+static enum GNUNET_GenericReturnValue
+parse_measures_ok (struct TALER_EXCHANGE_AmlGetMeasuresHandle *lh,
+ const json_t *json)
+{
+ struct TALER_EXCHANGE_AmlGetMeasuresResponse lr = {
+ .hr.reply = json,
+ .hr.http_status = MHD_HTTP_OK
+ };
+ const json_t *jroots;
+ const json_t *jprograms;
+ const json_t *jchecks;
+ struct GNUNET_JSON_Specification spec[] = {
+ GNUNET_JSON_spec_object_const ("roots",
+ &jroots),
+ GNUNET_JSON_spec_object_const ("programs",
+ &jprograms),
+ GNUNET_JSON_spec_object_const ("checks",
+ &jchecks),
+ GNUNET_JSON_spec_end ()
+ };
+
+ if (GNUNET_OK !=
+ GNUNET_JSON_parse (json,
+ spec,
+ NULL,
+ NULL))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ lr.details.ok.roots_length
+ = (unsigned int) json_object_size (jroots);
+ lr.details.ok.programs_length
+ = (unsigned int) json_object_size (jprograms);
+ lr.details.ok.checks_length
+ = (unsigned int) json_object_size (jchecks);
+ if ( ( ((size_t) lr.details.ok.roots_length)
+ != json_object_size (jroots)) ||
+ ( ((size_t) lr.details.ok.programs_length)
+ != json_object_size (jprograms)) ||
+ ( ((size_t) lr.details.ok.checks_length)
+ != json_object_size (jchecks)) )
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+
+ {
+ struct TALER_EXCHANGE_AvailableAmlMeasures roots[
+ GNUNET_NZL (lr.details.ok.roots_length)];
+ struct TALER_EXCHANGE_AvailableAmlPrograms progs[
+ GNUNET_NZL (lr.details.ok.programs_length)];
+ struct TALER_EXCHANGE_AvailableKycChecks checks[
+ GNUNET_NZL (lr.details.ok.checks_length)];
+ enum GNUNET_GenericReturnValue ret;
+
+ memset (roots,
+ 0,
+ sizeof (roots));
+ memset (progs,
+ 0,
+ sizeof (progs));
+ memset (checks,
+ 0,
+ sizeof (checks));
+ lr.details.ok.roots = roots;
+ lr.details.ok.programs = progs;
+ lr.details.ok.checks = checks;
+ ret = parse_aml_roots (jroots,
+ roots);
+ if (GNUNET_OK == ret)
+ ret = parse_aml_programs (lh,
+ jprograms,
+ progs);
+ if (GNUNET_OK == ret)
+ ret = parse_aml_checks (lh,
+ jchecks,
+ checks);
+ if (GNUNET_OK == ret)
+ {
+ lh->measures_cb (lh->measures_cb_cls,
+ &lr);
+ lh->measures_cb = NULL;
+ }
+ return ret;
+ }
+}
+
+
+/**
+ * Function called when we're done processing the
+ * HTTP /aml/$OFFICER_PUB/measures request.
+ *
+ * @param cls the `struct TALER_EXCHANGE_AmlGetMeasuresHandle`
+ * @param response_code HTTP response code, 0 on error
+ * @param response parsed JSON result, NULL on error
+ */
+static void
+handle_lookup_finished (void *cls,
+ long response_code,
+ const void *response)
+{
+ struct TALER_EXCHANGE_AmlGetMeasuresHandle *lh = cls;
+ const json_t *j = response;
+ struct TALER_EXCHANGE_AmlGetMeasuresResponse lr = {
+ .hr.reply = j,
+ .hr.http_status = (unsigned int) response_code
+ };
+
+ lh->job = NULL;
+ switch (response_code)
+ {
+ case 0:
+ lr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
+ break;
+ case MHD_HTTP_OK:
+ if (GNUNET_OK !=
+ parse_measures_ok (lh,
+ j))
+ {
+ GNUNET_break_op (0);
+ lr.hr.http_status = 0;
+ lr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
+ break;
+ }
+ GNUNET_assert (NULL == lh->measures_cb);
+ TALER_EXCHANGE_aml_get_measures_cancel (lh);
+ return;
+ case MHD_HTTP_NO_CONTENT:
+ break;
+ case MHD_HTTP_BAD_REQUEST:
+ lr.hr.ec = TALER_JSON_get_error_code (j);
+ lr.hr.hint = TALER_JSON_get_error_hint (j);
+ /* This should never happen, either us or the exchange is buggy
+ (or API version conflict); just pass JSON reply to the application */
+ break;
+ case MHD_HTTP_FORBIDDEN:
+ lr.hr.ec = TALER_JSON_get_error_code (j);
+ lr.hr.hint = TALER_JSON_get_error_hint (j);
+ /* Nothing really to verify, exchange says this coin was not melted; we
+ should pass the JSON reply to the application */
+ break;
+ case MHD_HTTP_INTERNAL_SERVER_ERROR:
+ lr.hr.ec = TALER_JSON_get_error_code (j);
+ lr.hr.hint = TALER_JSON_get_error_hint (j);
+ /* Server had an internal issue; we should retry, but this API
+ leaves this to the application */
+ break;
+ default:
+ /* unexpected response code */
+ GNUNET_break_op (0);
+ lr.hr.ec = TALER_JSON_get_error_code (j);
+ lr.hr.hint = TALER_JSON_get_error_hint (j);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Unexpected response code %u/%d for lookup AML decisions\n",
+ (unsigned int) response_code,
+ (int) lr.hr.ec);
+ break;
+ }
+ if (NULL != lh->measures_cb)
+ lh->measures_cb (lh->measures_cb_cls,
+ &lr);
+ TALER_EXCHANGE_aml_get_measures_cancel (lh);
+}
+
+
+struct TALER_EXCHANGE_AmlGetMeasuresHandle *
+TALER_EXCHANGE_aml_get_measures (
+ struct GNUNET_CURL_Context *ctx,
+ const char *exchange_url,
+ const struct TALER_AmlOfficerPrivateKeyP *officer_priv,
+ TALER_EXCHANGE_AmlMeasuresCallback cb,
+ void *cb_cls)
+{
+ struct TALER_EXCHANGE_AmlGetMeasuresHandle *lh;
+ CURL *eh;
+ struct TALER_AmlOfficerPublicKeyP officer_pub;
+ struct TALER_AmlOfficerSignatureP officer_sig;
+ char arg_str[sizeof (struct TALER_AmlOfficerPublicKeyP) * 2
+ + 32];
+
+ GNUNET_CRYPTO_eddsa_key_get_public (&officer_priv->eddsa_priv,
+ &officer_pub.eddsa_pub);
+ TALER_officer_aml_query_sign (officer_priv,
+ &officer_sig);
+ {
+ char pub_str[sizeof (officer_pub) * 2];
+ char *end;
+
+ end = GNUNET_STRINGS_data_to_string (
+ &officer_pub,
+ sizeof (officer_pub),
+ pub_str,
+ sizeof (pub_str));
+ *end = '\0';
+ GNUNET_snprintf (arg_str,
+ sizeof (arg_str),
+ "aml/%s/measures",
+ pub_str);
+ }
+ lh = GNUNET_new (struct TALER_EXCHANGE_AmlGetMeasuresHandle);
+ lh->measures_cb = cb;
+ lh->measures_cb_cls = cb_cls;
+ lh->url = TALER_url_join (exchange_url,
+ arg_str,
+ NULL);
+ if (NULL == lh->url)
+ {
+ GNUNET_free (lh);
+ return NULL;
+ }
+ eh = TALER_EXCHANGE_curl_easy_get_ (lh->url);
+ if (NULL == eh)
+ {
+ GNUNET_break (0);
+ GNUNET_free (lh->url);
+ GNUNET_free (lh);
+ return NULL;
+ }
+ {
+ char *hdr;
+ char sig_str[sizeof (officer_sig) * 2];
+ char *end;
+
+ end = GNUNET_STRINGS_data_to_string (
+ &officer_sig,
+ sizeof (officer_sig),
+ sig_str,
+ sizeof (sig_str));
+ *end = '\0';
+
+ GNUNET_asprintf (&hdr,
+ "%s: %s",
+ TALER_AML_OFFICER_SIGNATURE_HEADER,
+ sig_str);
+ lh->job_headers = curl_slist_append (NULL,
+ hdr);
+ GNUNET_free (hdr);
+ lh->job_headers = curl_slist_append (lh->job_headers,
+ "Content-type: application/json");
+ lh->job = GNUNET_CURL_job_add2 (ctx,
+ eh,
+ lh->job_headers,
+ &handle_lookup_finished,
+ lh);
+ }
+ return lh;
+}
+
+
+void
+TALER_EXCHANGE_aml_get_measures_cancel (
+ struct TALER_EXCHANGE_AmlGetMeasuresHandle *lh)
+{
+ if (NULL != lh->job)
+ {
+ GNUNET_CURL_job_cancel (lh->job);
+ lh->job = NULL;
+ }
+ curl_slist_free_all (lh->job_headers);
+ GNUNET_free (lh->url);
+ GNUNET_free (lh);
+}
+
+
+/* end of exchange_api_get_aml_measures.c */
