Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2024 Taler Systems SA
4 :
5 : TALER is free software; you can redistribute it and/or modify it under the
6 : terms of the GNU General Public License as published by the Free Software
7 : Foundation; either version 3, or (at your option) any later version.
8 :
9 : TALER is distributed in the hope that it will be useful, but WITHOUT ANY
10 : WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11 : A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12 :
13 : You should have received a copy of the GNU General Public License along with
14 : TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
15 : */
16 : /**
17 : * @file exchangedb/select_aml_attributes.c
18 : * @brief Implementation of the select_aml_attributes function for Postgres
19 : * @author Christian Grothoff
20 : */
21 : #include "taler/taler_pq_lib.h"
22 : #include "exchange-database/select_aml_attributes.h"
23 : #include "helper.h"
24 :
25 :
26 : /**
27 : * Closure for #handle_aml_result.
28 : */
29 : struct AmlAttributeResultContext
30 : {
31 : /**
32 : * Function to call on each result.
33 : */
34 : TALER_EXCHANGEDB_AmlAttributeCallback cb;
35 :
36 : /**
37 : * Closure for @e cb.
38 : */
39 : void *cb_cls;
40 :
41 : /**
42 : * Plugin context.
43 : */
44 : struct TALER_EXCHANGEDB_PostgresContext *pg;
45 :
46 : /**
47 : * Set to #GNUNET_SYSERR on serious errors.
48 : */
49 : enum GNUNET_GenericReturnValue status;
50 : };
51 :
52 :
53 : /**
54 : * Function to be called with the results of a SELECT statement
55 : * that has returned @a num_results results. Helper function
56 : * for #TALER_EXCHANGEDB_select_aml_attributes().
57 : *
58 : * @param cls closure of type `struct AmlAttributeResultContext *`
59 : * @param result the postgres result
60 : * @param num_results the number of results in @a result
61 : */
62 : static void
63 10 : handle_aml_attributes (void *cls,
64 : PGresult *result,
65 : unsigned int num_results)
66 : {
67 10 : struct AmlAttributeResultContext *ctx = cls;
68 :
69 20 : for (unsigned int i = 0; i<num_results; i++)
70 : {
71 : uint64_t rowid;
72 : struct GNUNET_TIME_Timestamp collection_time;
73 10 : char *officer_name = NULL;
74 : bool by_aml_officer;
75 : size_t enc_attributes_size;
76 : void *enc_attributes;
77 10 : struct GNUNET_PQ_ResultSpec rs[] = {
78 10 : GNUNET_PQ_result_spec_uint64 ("kyc_attributes_serial_id",
79 : &rowid),
80 10 : GNUNET_PQ_result_spec_timestamp ("collection_time",
81 : &collection_time),
82 10 : GNUNET_PQ_result_spec_bool ("by_aml_officer",
83 : &by_aml_officer),
84 10 : GNUNET_PQ_result_spec_allow_null (
85 : GNUNET_PQ_result_spec_string ("decider_name",
86 : &officer_name),
87 : NULL),
88 10 : GNUNET_PQ_result_spec_variable_size ("encrypted_attributes",
89 : &enc_attributes,
90 : &enc_attributes_size),
91 : GNUNET_PQ_result_spec_end
92 : };
93 :
94 10 : if (GNUNET_OK !=
95 10 : GNUNET_PQ_extract_result (result,
96 : rs,
97 : i))
98 : {
99 0 : GNUNET_break (0);
100 0 : ctx->status = GNUNET_SYSERR;
101 0 : return;
102 : }
103 :
104 10 : ctx->cb (ctx->cb_cls,
105 : rowid,
106 : collection_time,
107 : by_aml_officer,
108 : officer_name,
109 : enc_attributes_size,
110 : enc_attributes);
111 10 : GNUNET_PQ_cleanup_result (rs);
112 : }
113 : }
114 :
115 :
116 : enum GNUNET_DB_QueryStatus
117 10 : TALER_EXCHANGEDB_select_aml_attributes (
118 : struct TALER_EXCHANGEDB_PostgresContext *pg,
119 : const struct TALER_NormalizedPaytoHashP *h_payto,
120 : uint64_t offset,
121 : int64_t limit,
122 : TALER_EXCHANGEDB_AmlAttributeCallback cb,
123 : void *cb_cls)
124 : {
125 10 : uint64_t ulimit = (limit > 0) ? limit : -limit;
126 10 : struct GNUNET_PQ_QueryParam params[] = {
127 10 : GNUNET_PQ_query_param_auto_from_type (h_payto),
128 10 : GNUNET_PQ_query_param_uint64 (&offset),
129 10 : GNUNET_PQ_query_param_uint64 (&ulimit),
130 : GNUNET_PQ_query_param_end
131 : };
132 10 : struct AmlAttributeResultContext ctx = {
133 : .cb = cb,
134 : .cb_cls = cb_cls,
135 : .pg = pg,
136 : .status = GNUNET_OK
137 : };
138 : enum GNUNET_DB_QueryStatus qs;
139 10 : const char *stmt = (limit > 0)
140 : ? "select_aml_attributes_inc"
141 : : "select_aml_attributes_dec";
142 :
143 10 : PREPARE (pg,
144 : "select_aml_attributes_inc",
145 : "SELECT"
146 : " ka.kyc_attributes_serial_id"
147 : ",ka.collection_time"
148 : ",ka.by_aml_officer"
149 : ",astaff.decider_name"
150 : ",ka.encrypted_attributes"
151 : " FROM kyc_attributes ka"
152 : " LEFT JOIN legitimization_processes lp"
153 : " ON (ka.by_aml_officer AND"
154 : " (ka.legitimization_serial = lp.legitimization_process_serial_id))"
155 : " LEFT JOIN aml_staff astaff"
156 : " ON (ka.by_aml_officer AND"
157 : " (DECODE(lp.provider_user_id, 'base64') = astaff.decider_pub))"
158 : " WHERE ka.h_payto=$1"
159 : " AND ka.kyc_attributes_serial_id > $2"
160 : " ORDER BY ka.kyc_attributes_serial_id ASC"
161 : " LIMIT $3");
162 10 : PREPARE (pg,
163 : "select_aml_attributes_dec",
164 : "SELECT"
165 : " ka.kyc_attributes_serial_id"
166 : ",ka.collection_time"
167 : ",ka.by_aml_officer"
168 : ",astaff.decider_name"
169 : ",ka.encrypted_attributes"
170 : " FROM kyc_attributes ka"
171 : " LEFT JOIN legitimization_processes lp"
172 : " ON (ka.by_aml_officer AND"
173 : " (ka.legitimization_serial = lp.legitimization_process_serial_id))"
174 : " LEFT JOIN aml_staff astaff"
175 : " ON (ka.by_aml_officer AND"
176 : " (DECODE(lp.provider_user_id, 'base64') = astaff.decider_pub))"
177 : " WHERE ka.h_payto=$1"
178 : " AND ka.kyc_attributes_serial_id < $2"
179 : " ORDER BY ka.kyc_attributes_serial_id DESC"
180 : " LIMIT $3");
181 10 : qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
182 : stmt,
183 : params,
184 : &handle_aml_attributes,
185 : &ctx);
186 10 : if (GNUNET_OK != ctx.status)
187 0 : return GNUNET_DB_STATUS_HARD_ERROR;
188 10 : return qs;
189 : }
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