1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
/*
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 aml_signatures.c
* @brief Utility functions for AML officers
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_util.h"
#include "taler_signatures.h"
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief Format used to generate the signature on a request to deposit
* a coin into the account of a merchant.
*/
struct TALER_AmlDecisionPS
{
/**
* Purpose must be #TALER_SIGNATURE_AML_DECISION.
* Used for an EdDSA signature with the `struct TALER_AmlOfficerPublicKeyP`.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Hash over the justification text.
*/
struct GNUNET_HashCode h_justification GNUNET_PACKED;
/**
* Time when this decision was made.
*/
struct GNUNET_TIME_TimestampNBO decision_time;
/**
* New threshold for triggering possibly a new AML process.
*/
struct TALER_AmountNBO new_threshold;
/**
* Hash of the account identifier to which the decision applies.
*/
struct TALER_PaytoHashP h_payto GNUNET_PACKED;
/**
* What is the new AML status?
*/
uint32_t new_state GNUNET_PACKED;
};
GNUNET_NETWORK_STRUCT_END
void
TALER_officer_aml_decision_sign (
const char *justification,
struct GNUNET_TIME_Timestamp decision_time,
const struct TALER_Amount *new_threshold,
const struct TALER_PaytoHashP *h_payto,
enum TALER_AmlDecisionState new_state,
const struct TALER_AmlOfficerPrivateKeyP *officer_priv,
struct TALER_AmlOfficerSignatureP *officer_sig)
{
struct TALER_AmlDecisionPS ad = {
.purpose.purpose = htonl (TALER_SIGNATURE_AML_DECISION),
.purpose.size = htonl (sizeof (ad)),
.h_payto = *h_payto,
.new_state = htonl ((uint32_t) new_state)
};
GNUNET_CRYPTO_hash (justification,
strlen (justification),
&ad.h_justification);
TALER_amount_hton (&ad.new_threshold,
new_threshold);
GNUNET_CRYPTO_eddsa_sign (&officer_priv->eddsa_priv,
&ad,
&officer_sig->eddsa_signature);
}
enum GNUNET_GenericReturnValue
TALER_officer_aml_decision_verify (
const char *justification,
struct GNUNET_TIME_Timestamp decision_time,
const struct TALER_Amount *new_threshold,
const struct TALER_PaytoHashP *h_payto,
enum TALER_AmlDecisionState new_state,
const struct TALER_AmlOfficerPublicKeyP *officer_pub,
const struct TALER_AmlOfficerSignatureP *officer_sig)
{
struct TALER_AmlDecisionPS ad = {
.purpose.purpose = htonl (TALER_SIGNATURE_AML_DECISION),
.purpose.size = htonl (sizeof (ad)),
.h_payto = *h_payto,
.new_state = htonl ((uint32_t) new_state)
};
GNUNET_CRYPTO_hash (justification,
strlen (justification),
&ad.h_justification);
TALER_amount_hton (&ad.new_threshold,
new_threshold);
return GNUNET_CRYPTO_eddsa_verify (
TALER_SIGNATURE_AML_DECISION,
&ad,
&officer_sig->eddsa_signature,
&officer_pub->eddsa_pub);
}
/* end of aml_signatures.c */
|
