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[taler-donau] 01/03: [lib] implement some methods
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From: |
gnunet |
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Subject: |
[taler-donau] 01/03: [lib] implement some methods |
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Date: |
Tue, 28 Nov 2023 01:27:01 +0100 |
This is an automated email from the git hooks/post-receive script.
lukas-matyja pushed a commit to branch master
in repository donau.
commit ee6b9311792db3af424a9309391757367c013782
Author: Matyja Lukas Adam <lukas.matyja@students.bfh.ch>
AuthorDate: Tue Nov 28 01:10:45 2023 +0100
[lib] implement some methods
---
src/include/donau_crypto_lib.h | 62 +++++++
src/include/donau_service.h | 29 ---
src/lib/donau_api_handle.c | 395 ++++-------------------------------------
src/util/donau_crypto.c | 62 +++++++
4 files changed, 161 insertions(+), 387 deletions(-)
diff --git a/src/include/donau_crypto_lib.h b/src/include/donau_crypto_lib.h
index 1f5db06..6c0ae15 100644
--- a/src/include/donau_crypto_lib.h
+++ b/src/include/donau_crypto_lib.h
@@ -86,6 +86,29 @@ struct DONAU_CharityPrivateKeyP
};
+/**
+ * @brief Type of public signing keys for verifying blindly signed budis.
+ */
+struct DONAU_DonationUnitPublicKey
+{
+
+ /**
+ * Type of the public key.
+ */
+ struct GNUNET_CRYPTO_BlindSignPublicKey *bsign_pub_key;
+
+};
+
+/**
+ * @brief Type of private signing keys for blind signing of budis.
+ */
+struct DONAU_DonationUnitPrivateKey
+{
+
+ struct GNUNET_CRYPTO_BlindSignPrivateKey *bsign_priv_key;
+
+};
+
/**
* Hash of a donation unit public key
*/
@@ -258,4 +281,43 @@ DONAU_donation_statement_verify (
const struct DONAU_DonauSignatureP *statement_sig);
+/* ********************* helper ************************** */
+
+
+/**
+ * Group of donation units. These are the common fields of an array of
+ * donation units.
+ *
+ * The corresponding JSON-blob will also contain an array of particular
+ * denominations with only the cipher-specific public key and the
+ * corresponding year.
+ */
+struct DONAU_DonationUnitGroup
+{
+
+ /**
+ * Value of coins in this donation unit group.
+ */
+ struct TALER_Amount value;
+
+ /**
+ * Cipher used for the donation unit.
+ */
+ enum GNUNET_CRYPTO_BlindSignatureAlgorithm cipher;
+
+};
+
+/**
+ * Compute a unique key for the meta data of a donation unit group.
+ *
+ * @param dg donation unit group to evaluate
+ * @param[out] key key to set
+ */
+void
+TALER_donation_unit_group_get_key (
+ const struct DONAU_DonationUnitGroup *dg,
+ struct GNUNET_HashCode *key);
+
+
+
#endif
diff --git a/src/include/donau_service.h b/src/include/donau_service.h
index f009b14..bf6b3aa 100644
--- a/src/include/donau_service.h
+++ b/src/include/donau_service.h
@@ -53,35 +53,6 @@ struct TALER_DONAU_SigningPublicKeyAndValidity
};
-/**
- * @brief Type of public signing keys for verifying blindly signed donation
receipts.
- */
-struct TALER_DonationUnitPublicKey
-{
-
- /**
- * Type of the public key (RSA or CS).
- */
- enum GNUNET_CRYPTO_BlindSignatureAlgorithm cipher;
-
- /**
- * Details, depending on @e cipher.
- */
- union
- {
- /**
- * If we use #TALER_DENOMINATION_CS in @a cipher.
- */
- struct GNUNET_CRYPTO_CsPublicKey cs_public_key;
-
- /**
- * If we use #TALER_DENOMINATION_RSA in @a cipher.
- */
- struct GNUNET_CRYPTO_RsaPublicKey *rsa_public_key;
-
- } details;
-};
-
/**
* @brief Public information about a donau's donation unit signing key
*/
diff --git a/src/lib/donau_api_handle.c b/src/lib/donau_api_handle.c
index ebaffec..7dd0282 100644
--- a/src/lib/donau_api_handle.c
+++ b/src/lib/donau_api_handle.c
@@ -284,20 +284,10 @@ decode_keys_json (const json_t *resp_obj,
enum TALER_DONAU_VersionCompatibility *vc)
{
struct TALER_DonauSignatureP denominations_sig;
- struct GNUNET_HashCode hash_xor = {0};
struct TALER_DonauPublicKeyP pub;
- const json_t *wblwk = NULL;
- const json_t *global_fees;
const json_t *sign_keys_array;
- const json_t *denominations_by_group;
- const json_t *auditors_array;
- const json_t *recoup_array = NULL;
- const json_t *manifests = NULL;
- bool no_extensions = false;
+ const json_t *donation_units_by_group;
bool no_signature = false;
- const json_t *accounts;
- const json_t *fees;
- const json_t *wads;
if (JSON_OBJECT != json_typeof (resp_obj))
{
@@ -1399,25 +1389,25 @@ TALER_DONAU_keys_from_json (const json_t *j)
/**
- * Data we track per denomination group.
+ * Data we track per donation unit group.
*/
struct GroupData
{
/**
- * The json blob with the group meta-data and list of denominations
+ * The json blob with the group meta-data and list of donation units
*/
json_t *json;
/**
* Meta data for this group.
*/
- struct TALER_DenominationGroup meta;
+ struct DONAU_DonationUnitGroup meta;
};
/**
- * Add denomination group represented by @a value
- * to list of denominations in @a cls. Also frees
+ * Add donation unit group represented by @a value
+ * to list of donation units in @a cls. Also frees
* the @a value.
*
* @param[in,out] cls a `json_t *` with an array to build
@@ -1430,19 +1420,18 @@ add_grp (void *cls,
const struct GNUNET_HashCode *key,
void *value)
{
- json_t *denominations_by_group = cls;
+ json_t *donation_units_by_group = cls;
struct GroupData *gd = value;
const char *cipher;
json_t *ge;
- bool age_restricted = gd->meta.age_mask.bits != 0;
(void) key;
switch (gd->meta.cipher)
{
- case TALER_DENOMINATION_RSA:
+ case GNUNET_CRYPTO_BSA_RSA:
cipher = age_restricted ? "RSA+age_restricted" : "RSA";
break;
- case TALER_DENOMINATION_CS:
+ case GNUNET_CRYPTO_BSA_CS:
cipher = age_restricted ? "CS+age_restricted" : "CS";
break;
default:
@@ -1456,153 +1445,66 @@ add_grp (void *cls,
cipher),
GNUNET_JSON_pack_array_steal ("denoms",
gd->json),
- TALER_JSON_PACK_DENOM_FEES ("fee",
- &gd->meta.fees),
- GNUNET_JSON_pack_allow_null (
- age_restricted
- ? GNUNET_JSON_pack_uint64 ("age_mask",
- gd->meta.age_mask.bits)
- : GNUNET_JSON_pack_string ("dummy",
- NULL)),
TALER_JSON_pack_amount ("value",
&gd->meta.value));
GNUNET_assert (0 ==
- json_array_append_new (denominations_by_group,
+ json_array_append_new (donation_units_by_group,
ge));
GNUNET_free (gd);
return GNUNET_OK;
}
-/**
- * Convert array of account restrictions @a ars to JSON.
- *
- * @param ar_len length of @a ars
- * @param ars account restrictions to convert
- * @return JSON representation
- */
-static json_t *
-ar_to_json (unsigned int ar_len,
- const struct TALER_DONAU_AccountRestriction ars[static ar_len])
-{
- json_t *rval;
-
- rval = json_array ();
- GNUNET_assert (NULL != rval);
- for (unsigned int i = 0; i<ar_len; i++)
- {
- const struct TALER_DONAU_AccountRestriction *ar = &ars[i];
-
- switch (ar->type)
- {
- case TALER_DONAU_AR_INVALID:
- GNUNET_break (0);
- json_decref (rval);
- return NULL;
- case TALER_DONAU_AR_DENY:
- GNUNET_assert (
- 0 ==
- json_array_append_new (
- rval,
- GNUNET_JSON_PACK (
- GNUNET_JSON_pack_string ("type",
- "deny"))));
- break;
- case TALER_DONAU_AR_REGEX:
- GNUNET_assert (
- 0 ==
- json_array_append_new (
- rval,
- GNUNET_JSON_PACK (
- GNUNET_JSON_pack_string (
- "type",
- "regex"),
- GNUNET_JSON_pack_string (
- "regex",
- ar->details.regex.posix_egrep),
- GNUNET_JSON_pack_string (
- "human_hint",
- ar->details.regex.human_hint),
- GNUNET_JSON_pack_object_incref (
- "human_hint_i18n",
- (json_t *) ar->details.regex.human_hint_i18n)
- )));
- break;
- }
- }
- return rval;
-}
-
-
json_t *
TALER_DONAU_keys_to_json (const struct TALER_DONAU_Keys *kd)
{
- struct GNUNET_TIME_Timestamp now;
json_t *keys;
json_t *signkeys;
- json_t *denominations_by_group;
- json_t *auditors;
- json_t *recoup;
- json_t *wire_fees;
+ json_t *donation_units;
json_t *accounts;
- json_t *global_fees;
- json_t *wblwk = NULL;
now = GNUNET_TIME_timestamp_get ();
signkeys = json_array ();
GNUNET_assert (NULL != signkeys);
for (unsigned int i = 0; i<kd->num_sign_keys; i++)
{
- const struct TALER_DONAU_SigningPublicKey *sk = &kd->sign_keys[i];
+ const struct TALER_DONAU_SigningPublicKeyAndValidity *sk =
&kd->sign_keys[i];
json_t *signkey;
- if (GNUNET_TIME_timestamp_cmp (now,
- >,
- sk->valid_until))
- continue; /* skip keys that have expired */
signkey = GNUNET_JSON_PACK (
GNUNET_JSON_pack_data_auto ("key",
&sk->key),
- GNUNET_JSON_pack_data_auto ("master_sig",
- &sk->master_sig),
- GNUNET_JSON_pack_timestamp ("stamp_start",
- sk->valid_from),
- GNUNET_JSON_pack_timestamp ("stamp_expire",
- sk->valid_until),
- GNUNET_JSON_pack_timestamp ("stamp_end",
- sk->valid_legal));
+ GNUNET_JSON_pack_uint64 ("year",
+ &sk->year));
GNUNET_assert (NULL != signkey);
GNUNET_assert (0 ==
json_array_append_new (signkeys,
signkey));
}
- denominations_by_group = json_array ();
- GNUNET_assert (NULL != denominations_by_group);
+ donation_units_by_group = json_array ();
+ GNUNET_assert (NULL != donation_units_by_group);
{
struct GNUNET_CONTAINER_MultiHashMap *dbg;
dbg = GNUNET_CONTAINER_multihashmap_create (128,
false);
- for (unsigned int i = 0; i<kd->num_denom_keys; i++)
+ for (unsigned int i = 0; i<kd->num_donation_unit_keys; i++)
{
- const struct TALER_DONAU_DenomPublicKey *dk = &kd->denom_keys[i];
- struct TALER_DenominationGroup meta = {
- .cipher = dk->key.cipher,
+ const struct TALER_DonationUnitInformation *dk =
&kd->donation_unit_keys[i];
+ struct DONAU_DonationUnitGroup meta = {
+ .cipher = dk->key.bsign_pub_key->cipher,
.value = dk->value,
- .fees = dk->fees,
- .age_mask = dk->key.age_mask
+ .year = dk->year
};
struct GNUNET_HashCode key;
struct GroupData *gd;
- json_t *denom;
+ json_t *donation_unit;
struct GNUNET_JSON_PackSpec key_spec;
- if (GNUNET_TIME_timestamp_cmp (now,
- >,
- dk->expire_deposit))
- continue; /* skip keys that have expired */
- TALER_denomination_group_get_key (&meta,
+ //TODO: check year
+
+ TALER_donation_unit_group_get_key (&meta,
&key);
gd = GNUNET_CONTAINER_multihashmap_get (dbg,
&key);
@@ -1621,28 +1523,28 @@ TALER_DONAU_keys_to_json (const struct TALER_DONAU_Keys
*kd)
}
/* Build the running xor of the SHA512-hash of the public keys */
- GNUNET_CRYPTO_hash_xor (&dk->h_key.hash,
+ /*GNUNET_CRYPTO_hash_xor (&dk->h_key.hash,
&gd->meta.hash,
- &gd->meta.hash);
+ &gd->meta.hash);*/
switch (meta.cipher)
{
- case TALER_DENOMINATION_RSA:
+ case GNUNET_CRYPTO_BSA_RSA:
key_spec =
GNUNET_JSON_pack_rsa_public_key (
"rsa_pub",
- dk->key.details.rsa_public_key);
+ dk->key.bsign_pub_key->details.rsa_public_key);
break;
- case TALER_DENOMINATION_CS:
+ case GNUNET_CRYPTO_BSA_CS:
key_spec =
GNUNET_JSON_pack_data_varsize (
"cs_pub",
- &dk->key.details.cs_public_key,
- sizeof (dk->key.details.cs_public_key));
+ &dk->key.bsign_pub_key->details.cs_public_key,
+ sizeof (dk->key.bsign_pub_key->details.cs_public_key));
break;
default:
GNUNET_assert (false);
}
- denom = GNUNET_JSON_PACK (
+ donation_unit = GNUNET_JSON_PACK (
GNUNET_JSON_pack_timestamp ("stamp_expire_deposit",
dk->expire_deposit),
GNUNET_JSON_pack_timestamp ("stamp_expire_withdraw",
@@ -1657,192 +1559,14 @@ TALER_DONAU_keys_to_json (const struct
TALER_DONAU_Keys *kd)
);
GNUNET_assert (0 ==
json_array_append_new (gd->json,
- denom));
+ donation_unit));
}
GNUNET_CONTAINER_multihashmap_iterate (dbg,
&add_grp,
- denominations_by_group);
+ donation_unit_by_group);
GNUNET_CONTAINER_multihashmap_destroy (dbg);
}
- auditors = json_array ();
- GNUNET_assert (NULL != auditors);
- for (unsigned int i = 0; i<kd->num_auditors; i++)
- {
- const struct TALER_DONAU_AuditorInformation *ai = &kd->auditors[i];
- json_t *a;
- json_t *adenoms;
-
- adenoms = json_array ();
- GNUNET_assert (NULL != adenoms);
- for (unsigned int j = 0; j<ai->num_denom_keys; j++)
- {
- const struct TALER_DONAU_AuditorDenominationInfo *adi =
- &ai->denom_keys[j];
- const struct TALER_DONAU_DenomPublicKey *dk =
- &kd->denom_keys[adi->denom_key_offset];
- json_t *k;
-
- GNUNET_assert (adi->denom_key_offset < kd->num_denom_keys);
- if (GNUNET_TIME_timestamp_cmp (now,
- >,
- dk->expire_deposit))
- continue; /* skip auditor signatures for denomination keys that have
expired */
- GNUNET_assert (adi->denom_key_offset < kd->num_denom_keys);
- k = GNUNET_JSON_PACK (
- GNUNET_JSON_pack_data_auto ("denom_pub_h",
- &dk->h_key),
- GNUNET_JSON_pack_data_auto ("auditor_sig",
- &adi->auditor_sig));
- GNUNET_assert (0 ==
- json_array_append_new (adenoms,
- k));
- }
-
- a = GNUNET_JSON_PACK (
- GNUNET_JSON_pack_data_auto ("auditor_pub",
- &ai->auditor_pub),
- GNUNET_JSON_pack_string ("auditor_url",
- ai->auditor_url),
- GNUNET_JSON_pack_array_steal ("denomination_keys",
- adenoms));
- GNUNET_assert (0 ==
- json_array_append_new (auditors,
- a));
- }
-
- global_fees = json_array ();
- GNUNET_assert (NULL != global_fees);
- for (unsigned int i = 0; i<kd->num_global_fees; i++)
- {
- const struct TALER_DONAU_GlobalFee *gf
- = &kd->global_fees[i];
-
- if (GNUNET_TIME_absolute_is_past (gf->end_date.abs_time))
- continue;
- GNUNET_assert (
- 0 ==
- json_array_append_new (
- global_fees,
- GNUNET_JSON_PACK (
- GNUNET_JSON_pack_timestamp ("start_date",
- gf->start_date),
- GNUNET_JSON_pack_timestamp ("end_date",
- gf->end_date),
- TALER_JSON_PACK_GLOBAL_FEES (&gf->fees),
- GNUNET_JSON_pack_time_rel ("history_expiration",
- gf->history_expiration),
- GNUNET_JSON_pack_time_rel ("purse_timeout",
- gf->purse_timeout),
- GNUNET_JSON_pack_uint64 ("purse_account_limit",
- gf->purse_account_limit),
- GNUNET_JSON_pack_data_auto ("master_sig",
- &gf->master_sig))));
- }
-
- accounts = json_array ();
- GNUNET_assert (NULL != accounts);
- for (unsigned int i = 0; i<kd->accounts_len; i++)
- {
- const struct TALER_DONAU_WireAccount *acc
- = &kd->accounts[i];
- json_t *credit_restrictions;
- json_t *debit_restrictions;
-
- credit_restrictions
- = ar_to_json (acc->credit_restrictions_length,
- acc->credit_restrictions);
- GNUNET_assert (NULL != credit_restrictions);
- debit_restrictions
- = ar_to_json (acc->debit_restrictions_length,
- acc->debit_restrictions);
- GNUNET_assert (NULL != debit_restrictions);
- GNUNET_assert (
- 0 ==
- json_array_append_new (
- accounts,
- GNUNET_JSON_PACK (
- GNUNET_JSON_pack_string ("payto_uri",
- acc->payto_uri),
- GNUNET_JSON_pack_allow_null (
- GNUNET_JSON_pack_string ("conversion_url",
- acc->conversion_url)),
- GNUNET_JSON_pack_array_steal ("debit_restrictions",
- debit_restrictions),
- GNUNET_JSON_pack_array_steal ("credit_restrictions",
- credit_restrictions),
- GNUNET_JSON_pack_data_auto ("master_sig",
- &acc->master_sig))));
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Serialized %u/%u wire accounts to JSON\n",
- (unsigned int) json_array_size (accounts),
- kd->accounts_len);
-
- wire_fees = json_object ();
- GNUNET_assert (NULL != wire_fees);
- for (unsigned int i = 0; i<kd->fees_len; i++)
- {
- const struct TALER_DONAU_WireFeesByMethod *fbw
- = &kd->fees[i];
- json_t *wf;
-
- wf = json_array ();
- GNUNET_assert (NULL != wf);
- for (struct TALER_DONAU_WireAggregateFees *p = fbw->fees_head;
- NULL != p;
- p = p->next)
- {
- GNUNET_assert (
- 0 ==
- json_array_append_new (
- wf,
- GNUNET_JSON_PACK (
- TALER_JSON_pack_amount ("wire_fee",
- &p->fees.wire),
- TALER_JSON_pack_amount ("closing_fee",
- &p->fees.closing),
- GNUNET_JSON_pack_timestamp ("start_date",
- p->start_date),
- GNUNET_JSON_pack_timestamp ("end_date",
- p->end_date),
- GNUNET_JSON_pack_data_auto ("sig",
- &p->master_sig))));
- }
- GNUNET_assert (0 ==
- json_object_set_new (wire_fees,
- fbw->method,
- wf));
- }
-
- recoup = json_array ();
- GNUNET_assert (NULL != recoup);
- for (unsigned int i = 0; i<kd->num_denom_keys; i++)
- {
- const struct TALER_DONAU_DenomPublicKey *dk
- = &kd->denom_keys[i];
- if (! dk->revoked)
- continue;
- GNUNET_assert (0 ==
- json_array_append_new (
- recoup,
- GNUNET_JSON_PACK (
- GNUNET_JSON_pack_data_auto ("h_denom_pub",
- &dk->h_key))));
- }
-
- wblwk = json_array ();
- GNUNET_assert (NULL != wblwk);
- for (unsigned int i = 0; i<kd->wblwk_length; i++)
- {
- const struct TALER_Amount *a = &kd->wallet_balance_limit_without_kyc[i];
-
- GNUNET_assert (0 ==
- json_array_append_new (
- wblwk,
- TALER_JSON_from_amount (a)));
- }
-
keys = GNUNET_JSON_PACK (
GNUNET_JSON_pack_string ("version",
kd->version),
@@ -1850,59 +1574,14 @@ TALER_DONAU_keys_to_json (const struct TALER_DONAU_Keys
*kd)
kd->currency),
GNUNET_JSON_pack_uint64 ("currency_fraction_digits",
kd->currency_fraction_digits),
- TALER_JSON_pack_amount ("stefan_abs",
- &kd->stefan_abs),
- TALER_JSON_pack_amount ("stefan_log",
- &kd->stefan_log),
- TALER_JSON_pack_amount ("stefan_lin",
- &kd->stefan_lin),
- GNUNET_JSON_pack_string ("asset_type",
- kd->asset_type),
- GNUNET_JSON_pack_data_auto ("master_public_key",
- &kd->master_pub),
- GNUNET_JSON_pack_time_rel ("reserve_closing_delay",
- kd->reserve_closing_delay),
- GNUNET_JSON_pack_timestamp ("list_issue_date",
- kd->list_issue_date),
- GNUNET_JSON_pack_array_steal ("global_fees",
- global_fees),
GNUNET_JSON_pack_array_steal ("signkeys",
signkeys),
- GNUNET_JSON_pack_object_steal ("wire_fees",
- wire_fees),
- GNUNET_JSON_pack_array_steal ("accounts",
- accounts),
- GNUNET_JSON_pack_array_steal ("wads",
- json_array ()),
- GNUNET_JSON_pack_array_steal ("denominations",
- denominations_by_group),
- GNUNET_JSON_pack_allow_null (
- GNUNET_JSON_pack_array_steal ("recoup",
- recoup)),
- GNUNET_JSON_pack_array_steal ("auditors",
- auditors),
- GNUNET_JSON_pack_bool ("rewards_allowed",
- kd->rewards_allowed),
- GNUNET_JSON_pack_allow_null (
- GNUNET_JSON_pack_object_incref ("extensions",
- kd->extensions)),
- GNUNET_JSON_pack_allow_null (
- GNUNET_is_zero (&kd->extensions_sig)
- ? GNUNET_JSON_pack_string ("dummy",
- NULL)
- : GNUNET_JSON_pack_data_auto ("extensions_sig",
- &kd->extensions_sig)),
- GNUNET_JSON_pack_allow_null (
- GNUNET_JSON_pack_array_steal ("wallet_balance_limit_without_kyc",
- wblwk))
-
+ GNUNET_JSON_pack_array_steal ("donation_units",
+ donation_units_by_group)
);
return GNUNET_JSON_PACK (
GNUNET_JSON_pack_uint64 ("version",
DONAU_SERIALIZATION_FORMAT_VERSION),
- GNUNET_JSON_pack_allow_null (
- GNUNET_JSON_pack_timestamp ("expire",
- kd->key_data_expiration)),
GNUNET_JSON_pack_string ("donau_url",
kd->donau_url),
GNUNET_JSON_pack_object_steal ("keys",
diff --git a/src/util/donau_crypto.c b/src/util/donau_crypto.c
new file mode 100644
index 0000000..d2805e4
--- /dev/null
+++ b/src/util/donau_crypto.c
@@ -0,0 +1,62 @@
+/*
+ This file is part of TALER
+ Copyright (C) 2014-2022 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 util/donau_crypto.c
+ * @brief Cryptographic utility functions
+ * @author Lukas Matyja
+ */
+#include <taler/platform.h>
+#include <taler/taler_util.h>
+#include "donau_util.h"
+#include <gcrypt.h>
+
+GNUNET_NETWORK_STRUCT_BEGIN
+/**
+ * Structure we hash to compute the group key for
+ * a donation unit group.
+ */
+struct DonationUnitGroupP
+{
+ /**
+ * Value of coins in this denomination group.
+ */
+ struct TALER_AmountNBO value;
+
+ /**
+ * Cipher used for the donation unit, in NBO.
+ */
+ uint32_t cipher GNUNET_PACKED;
+};
+GNUNET_NETWORK_STRUCT_END
+
+
+
+void
+TALER_donation_unit_group_get_key (
+ const struct DonationUnitGroupP *dg,
+ struct GNUNET_HashCode *key)
+{
+ struct DonationUnitGroupP dgp = {
+ .cipher = htonl (dg->cipher)
+ };
+
+ TALER_amount_hton (&dgp.value,
+ &dg->value);
+ GNUNET_CRYPTO_hash (&dgp,
+ sizeof (dgp),
+ key);
+}
+
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