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m---------contrib/gana0
-rw-r--r--src/include/taler_crypto_lib.h25
-rw-r--r--src/lib/exchange_api_lookup_aml_decisions.c245
-rw-r--r--src/util/aml_signatures.c62
4 files changed, 330 insertions, 2 deletions
diff --git a/contrib/gana b/contrib/gana
-Subproject 84a6023656a0acc8598950a65351a5d3526e84a
+Subproject 14cb23ef0e31d3470a0671fe165a1557eddc059
diff --git a/src/include/taler_crypto_lib.h b/src/include/taler_crypto_lib.h
index dfd40e1d4..484f0f225 100644
--- a/src/include/taler_crypto_lib.h
+++ b/src/include/taler_crypto_lib.h
@@ -2370,6 +2370,31 @@ TALER_CRYPTO_contract_decrypt_for_deposit (
/* **************** AML officer signatures **************** */
+/**
+ * Sign AML query. Simple authentication, doesn't actually
+ * sign anything.
+ *
+ * @param officer_priv private key of AML officer
+ * @param[out] officer_sig where to write the signature
+ */
+void
+TALER_officer_aml_query_sign (
+ const struct TALER_AmlOfficerPrivateKeyP *officer_priv,
+ struct TALER_AmlOfficerSignatureP *officer_sig);
+
+
+/**
+ * Verify AML query authorization.
+ *
+ * @param officer_pub public key of AML officer
+ * @param officer_sig signature to verify
+ * @return #GNUNET_OK if the signature is valid
+ */
+enum GNUNET_GenericReturnValue
+TALER_officer_aml_query_verify (
+ const struct TALER_AmlOfficerPublicKeyP *officer_pub,
+ const struct TALER_AmlOfficerSignatureP *officer_sig);
+
/**
* Sign AML decision.
diff --git a/src/lib/exchange_api_lookup_aml_decisions.c b/src/lib/exchange_api_lookup_aml_decisions.c
new file mode 100644
index 000000000..50abcd6ba
--- /dev/null
+++ b/src/lib/exchange_api_lookup_aml_decisions.c
@@ -0,0 +1,245 @@
+/*
+ This file is part of TALER
+ Copyright (C) 2023 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_lookup_aml_decisions.c
+ * @brief Implementation of the /aml/$OFFICER_PUB/decisions request
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <microhttpd.h> /* just for HTTP status codes */
+#include <gnunet/gnunet_util_lib.h>
+#include <gnunet/gnunet_curl_lib.h>
+#include "taler_exchange_service.h"
+#include "taler_json_lib.h"
+#include "exchange_api_handle.h"
+#include "taler_signatures.h"
+#include "exchange_api_curl_defaults.h"
+
+
+/**
+ * @brief A /coins/$COIN_PUB/link Handle
+ */
+struct TALER_EXCHANGE_LookupAmlDecisions
+{
+
+ /**
+ * The url for this request.
+ */
+ char *url;
+
+ /**
+ * Handle for the request.
+ */
+ struct GNUNET_CURL_Job *job;
+
+ /**
+ * Function to call with the result.
+ */
+ TALER_EXCHANGE_LookupAmlDecisionsCallback decisions_cb;
+
+ /**
+ * Closure for @e cb.
+ */
+ void *decisions_cb_cls;
+
+};
+
+
+/**
+ * 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_decisions_ok (struct TALER_EXCHANGE_LookupAmlDecisions *lh,
+ const json_t *json)
+{
+ struct TALER_EXCHANGE_AmlDecisionsResponse lr = {
+ .hr.reply = json,
+ .hr.http_status = MHD_HTTP_OK
+ };
+ int ret = GNUNET_SYSERR;
+
+ GNUNET_break (0); // FIXME: parse response!
+ return ret;
+}
+
+
+/**
+ * Function called when we're done processing the
+ * HTTP /aml/$OFFICER_PUB/decisions request.
+ *
+ * @param cls the `struct TALER_EXCHANGE_LookupAmlDecisions`
+ * @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_LookupAmlDecisions *lh = cls;
+ const json_t *j = response;
+ struct TALER_EXCHANGE_LinkResult 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_decisions_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->decisions_cb);
+ TALER_EXCHANGE_link_cancel (lh);
+ return;
+ 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_NOT_FOUND:
+ 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 exchange link\n",
+ (unsigned int) response_code,
+ (int) lr.hr.ec);
+ break;
+ }
+ if (NULL != lh->decisions_cb)
+ lh->decisions_cb (lh->decisions_cb_cls,
+ &lr);
+ TALER_EXCHANGE_link_cancel (lh);
+}
+
+
+struct TALER_EXCHANGE_LookupAmlDecisions *
+TALER_EXCHANGE_link (
+ struct GNUNET_CURL_Context *ctx,
+ const char *url,
+ uint64_t start,
+ int delta,
+ bool filter_frozen,
+ bool filter_pending,
+ bool filter_normal,
+ const struct TALER_AmlOfficerPrivateKeyP *officer_priv,
+ TALER_EXCHANGE_LookupAmlDecisionsCallback cb,
+ void *cb_cls)
+{
+ struct TALER_EXCHANGE_LookupAmlDecisions *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 (struct TALER_AmlOfficerPublicKeyP) * 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/decisions",
+ pub_str);
+ }
+ lh = GNUNET_new (struct TALER_EXCHANGE_LookupAmlDecisions);
+ lh->decisions_cb = cb;
+ lh->decisions_cb_cls = cb_cls;
+ lh->url = TALER_URL_join (exchange_url,
+ arg_str,
+ "frozen",
+ filter_fozen ? "yes" : NULL,
+ "pending",
+ filter_pending ? "yes" : NULL,
+ "normal",
+ filter_normal ? "yes" : NULL,
+ 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;
+ }
+ // FIXME: add authorization header to 'eh' based on officer_sig!
+ lh->job = GNUNET_CURL_job_add_with_ct_json (ctx,
+ eh,
+ &handle_lookup_finished,
+ lh);
+ return lh;
+}
+
+
+void
+TALER_EXCHANGE_lookup_aml_decisions (struct
+ TALER_EXCHANGE_LookupAmlDecisions *lh)
+{
+ if (NULL != lh->job)
+ {
+ GNUNET_CURL_job_cancel (lh->job);
+ lh->job = NULL;
+ }
+ GNUNET_free (lh->url);
+ GNUNET_free (lh);
+}
+
+
+/* end of exchange_api_lookup_aml_decisions.c */
diff --git a/src/util/aml_signatures.c b/src/util/aml_signatures.c
index 7d5d30473..cad2e7488 100644
--- a/src/util/aml_signatures.c
+++ b/src/util/aml_signatures.c
@@ -26,8 +26,7 @@
GNUNET_NETWORK_STRUCT_BEGIN
/**
- * @brief Format used to generate the signature on a request to deposit
- * a coin into the account of a merchant.
+ * @brief Format used to generate the signature on an AML decision.
*/
struct TALER_AmlDecisionPS
{
@@ -124,4 +123,63 @@ TALER_officer_aml_decision_verify (
}
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * @brief Format used to generate the signature on any AML query.
+ */
+struct TALER_AmlQueryPS
+{
+ /**
+ * Purpose must be #TALER_SIGNATURE_AML_QUERY.
+ * Used for an EdDSA signature with the `struct TALER_AmlOfficerPublicKeyP`.
+ */
+ struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+
+};
+
+GNUNET_NETWORK_STRUCT_END
+
+
+void
+TALER_officer_aml_query_sign (
+ const struct TALER_AmlOfficerPrivateKeyP *officer_priv,
+ struct TALER_AmlOfficerSignatureP *officer_sig)
+{
+ struct TALER_AmlQueryPS aq = {
+ .purpose.purpose = htonl (TALER_SIGNATURE_AML_QUERY),
+ .purpose.size = htonl (sizeof (aq))
+ };
+
+ GNUNET_CRYPTO_eddsa_sign (&officer_priv->eddsa_priv,
+ &aq,
+ &officer_sig->eddsa_signature);
+}
+
+
+/**
+ * Verify AML query authorization.
+ *
+ * @param officer_pub public key of AML officer
+ * @param officer_sig signature to verify
+ * @return #GNUNET_OK if the signature is valid
+ */
+enum GNUNET_GenericReturnValue
+TALER_officer_aml_query_verify (
+ const struct TALER_AmlOfficerPublicKeyP *officer_pub,
+ const struct TALER_AmlOfficerSignatureP *officer_sig)
+{
+ struct TALER_AmlQueryPS aq = {
+ .purpose.purpose = htonl (TALER_SIGNATURE_AML_QUERY),
+ .purpose.size = htonl (sizeof (aq))
+ };
+
+ return GNUNET_CRYPTO_eddsa_verify (
+ TALER_SIGNATURE_AML_QUERY,
+ &aq,
+ &officer_sig->eddsa_signature,
+ &officer_pub->eddsa_pub);
+}
+
+
/* end of aml_signatures.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-06 14:56:52 +0000