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expose TALER_EXCHANGE_parse_accounts() in external API

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Christian Grothoff 2023-04-30 23:37:01 +02:00
parent 75f75c4a51
commit faca037018
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GPG Key ID: 939E6BE1E29FC3CC
4 changed files with 232 additions and 197 deletions
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2
contrib/gana

@ -1 +1 @@
Subproject commit 5cfe18c5bbfd404a5f7cf27a78577c881ddb9ebd
Subproject commit d831c7f72a5030e20efb4ada7babc103ccd01fab

27
src/include/taler_exchange_service.h
View File

@ -909,6 +909,33 @@ struct TALER_EXCHANGE_WireAccount
};
/**
* Parse array of @a accounts of the exchange into @a was.
*
* @param master_pub master public key of the exchange, NULL to not verify signatures
* @param accounts array of accounts to parse
* @param[out] was where to write the result (already allocated)
* @param was_length length of the @a was array, must match the length of @a accounts
* @return #GNUNET_OK if parsing @a accounts succeeded
*/
enum GNUNET_GenericReturnValue
TALER_EXCHANGE_parse_accounts (const struct TALER_MasterPublicKeyP *master_pub,
const json_t *accounts,
struct TALER_EXCHANGE_WireAccount was[],
unsigned int was_length);
/**
* Free data within @a was, but not @a was itself.
*
* @param was array of wire account data
* @param was_len length of the @a was array
*/
void
TALER_EXCHANGE_free_accounts (struct TALER_EXCHANGE_WireAccount *was,
unsigned int was_len);
/**
* Response to a /wire request.
*/

192
src/lib/exchange_api_common.c
View File

@ -2194,4 +2194,196 @@ TALER_EXCHANGE_verify_deposit_signature_ (
}
/**
* Parse account restriction in @a jrest into @a rest.
*
* @param jrest array of account restrictions in JSON
* @param[out] resta_len set to length of @a resta
* @param[out] resta account restriction array to set
* @return #GNUNET_OK on success
*/
static enum GNUNET_GenericReturnValue
parse_restrictions (const json_t *jresta,
unsigned int *resta_len,
struct TALER_EXCHANGE_AccountRestriction **resta)
{
if (! json_is_array (jresta))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
*resta_len = json_array_size (jresta);
if (0 == *resta_len)
{
/* no restrictions, perfectly OK */
*resta = NULL;
return GNUNET_OK;
}
*resta = GNUNET_new_array (*resta_len,
struct TALER_EXCHANGE_AccountRestriction);
for (unsigned int i = 0; i<*resta_len; i++)
{
const json_t *jr = json_array_get (jresta,
i);
struct TALER_EXCHANGE_AccountRestriction *ar = &(*resta)[i];
const char *type = json_string_value (json_object_get (jr,
"type"));
if (NULL == type)
{
GNUNET_break (0);
goto fail;
}
if (0 == strcmp (type,
"deny"))
{
ar->type = TALER_EXCHANGE_AR_DENY;
continue;
}
if (0 == strcmp (type,
"regex"))
{
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string (
"payto_regex",
&ar->details.regex.posix_egrep),
GNUNET_JSON_spec_string (
"human_hint",
&ar->details.regex.human_hint),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_object_const (
"human_hint_i18n",
&ar->details.regex.human_hint_i18n),
NULL),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (jr,
spec,
NULL, NULL))
{
/* bogus reply */
GNUNET_break_op (0);
goto fail;
}
ar->type = TALER_EXCHANGE_AR_REGEX;
continue;
}
/* unsupported type */
GNUNET_break (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
fail:
GNUNET_free (*resta);
*resta_len = 0;
return GNUNET_SYSERR;
}
enum GNUNET_GenericReturnValue
TALER_EXCHANGE_parse_accounts (const struct TALER_MasterPublicKeyP *master_pub,
const json_t *accounts,
struct TALER_EXCHANGE_WireAccount was[],
unsigned int was_length)
{
memset (was,
0,
sizeof (struct TALER_EXCHANGE_WireAccount) * was_length);
GNUNET_assert (was_length ==
json_array_size (accounts));
for (unsigned int i = 0;
i<was_length;
i++)
{
struct TALER_EXCHANGE_WireAccount *wa = &was[i];
json_t *credit_restrictions;
json_t *debit_restrictions;
struct GNUNET_JSON_Specification spec_account[] = {
GNUNET_JSON_spec_string ("payto_uri",
&wa->payto_uri),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_string ("conversion_url",
&wa->conversion_url),
NULL),
GNUNET_JSON_spec_json ("credit_restrictions",
&credit_restrictions),
GNUNET_JSON_spec_json ("debit_restrictions",
&debit_restrictions),
GNUNET_JSON_spec_fixed_auto ("master_sig",
&wa->master_sig),
GNUNET_JSON_spec_end ()
};
json_t *account;
account = json_array_get (accounts,
i);
if (GNUNET_OK !=
GNUNET_JSON_parse (account,
spec_account,
NULL, NULL))
{
/* bogus reply */
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
{
char *err;
err = TALER_payto_validate (wa->payto_uri);
if (NULL != err)
{
GNUNET_break_op (0);
GNUNET_free (err);
return GNUNET_SYSERR;
}
}
if ( (NULL != master_pub) &&
(GNUNET_OK !=
TALER_exchange_wire_signature_check (wa->payto_uri,
wa->conversion_url,
debit_restrictions,
credit_restrictions,
master_pub,
&wa->master_sig)) )
{
/* bogus reply */
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if ( (GNUNET_OK !=
parse_restrictions (credit_restrictions,
&wa->credit_restrictions_length,
&wa->credit_restrictions)) ||
(GNUNET_OK !=
parse_restrictions (debit_restrictions,
&wa->debit_restrictions_length,
&wa->debit_restrictions)) )
{
/* bogus reply */
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
GNUNET_JSON_parse_free (spec_account);
} /* end 'for all accounts */
return GNUNET_OK;
}
void
TALER_EXCHANGE_free_accounts (struct TALER_EXCHANGE_WireAccount *was,
unsigned int was_len)
{
for (unsigned int i = 0; i<was_len; i++)
{
struct TALER_EXCHANGE_WireAccount *wa = &was[i];
GNUNET_free (wa->credit_restrictions);
GNUNET_free (wa->debit_restrictions);
}
}
/* end of exchange_api_common.c */

196
src/lib/exchange_api_wire.c
View File

@ -173,114 +173,6 @@ parse_fees (const struct TALER_MasterPublicKeyP *master_pub,
}
/**
* Parse account restriction in @a jrest into @a rest.
*
* @param jrest array of account restrictions in JSON
* @param[out] resta_len set to length of @a resta
* @param[out] resta account restriction array to set
* @return #GNUNET_OK on success
*/
static enum GNUNET_GenericReturnValue
parse_restrictions (const json_t *jresta,
unsigned int *resta_len,
struct TALER_EXCHANGE_AccountRestriction **resta)
{
if (! json_is_array (jresta))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
*resta_len = json_array_size (jresta);
if (0 == *resta_len)
{
/* no restrictions, perfectly OK */
*resta = NULL;
return GNUNET_OK;
}
*resta = GNUNET_new_array (*resta_len,
struct TALER_EXCHANGE_AccountRestriction);
for (unsigned int i = 0; i<*resta_len; i++)
{
const json_t *jr = json_array_get (jresta,
i);
struct TALER_EXCHANGE_AccountRestriction *ar = &(*resta)[i];
const char *type = json_string_value (json_object_get (jr,
"type"));
if (NULL == type)
{
GNUNET_break (0);
goto fail;
}
if (0 == strcmp (type,
"deny"))
{
ar->type = TALER_EXCHANGE_AR_DENY;
continue;
}
if (0 == strcmp (type,
"regex"))
{
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string (
"payto_regex",
&ar->details.regex.posix_egrep),
GNUNET_JSON_spec_string (
"human_hint",
&ar->details.regex.human_hint),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_object_const (
"human_hint_i18n",
&ar->details.regex.human_hint_i18n),
NULL),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (jr,
spec,
NULL, NULL))
{
/* bogus reply */
GNUNET_break_op (0);
goto fail;
}
ar->type = TALER_EXCHANGE_AR_REGEX;
continue;
}
/* unsupported type */
GNUNET_break (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
fail:
GNUNET_free (*resta);
*resta_len = 0;
return GNUNET_SYSERR;
}
/**
* Free data within @a was, but not @a was itself.
*
* @param was array of wire account data
* @param was_len length of the @a was array
*/
static void
free_accounts (struct TALER_EXCHANGE_WireAccount *was,
unsigned int was_len)
{
for (unsigned int i = 0; i<was_len; i++)
{
struct TALER_EXCHANGE_WireAccount *wa = &was[i];
GNUNET_free (wa->credit_restrictions);
GNUNET_free (wa->debit_restrictions);
}
}
/**
* Function called when we're done processing the
* HTTP /wire request.
@ -383,100 +275,24 @@ handle_wire_finished (void *cls,
{
struct TALER_EXCHANGE_WireAccount was[wr.details.ok.accounts_len];
memset (was,
0,
sizeof (was));
wr.details.ok.accounts = was;
for (unsigned int i = 0;
i<wr.details.ok.accounts_len;
i++)
{
struct TALER_EXCHANGE_WireAccount *wa = &was[i];
json_t *credit_restrictions;
json_t *debit_restrictions;
struct GNUNET_JSON_Specification spec_account[] = {
GNUNET_JSON_spec_string ("payto_uri",
&wa->payto_uri),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_string ("conversion_url",
&wa->conversion_url),
NULL),
GNUNET_JSON_spec_json ("credit_restrictions",
&credit_restrictions),
GNUNET_JSON_spec_json ("debit_restrictions",
&debit_restrictions),
GNUNET_JSON_spec_fixed_auto ("master_sig",
&wa->master_sig),
GNUNET_JSON_spec_end ()
};
json_t *account;
account = json_array_get (accounts,
i);
if (GNUNET_OK !=
GNUNET_JSON_parse (account,
spec_account,
NULL, NULL))
{
/* bogus reply */
GNUNET_break_op (0);
wr.hr.http_status = 0;
wr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
break;
}
{
char *err;
err = TALER_payto_validate (wa->payto_uri);
if (NULL != err)
TALER_EXCHANGE_parse_accounts (&master_pub,
accounts,
was,
wr.details.ok.accounts_len))
{
GNUNET_break_op (0);
wr.hr.http_status = 0;
wr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
GNUNET_free (err);
break;
}
}
if (GNUNET_OK !=
TALER_exchange_wire_signature_check (wa->payto_uri,
wa->conversion_url,
debit_restrictions,
credit_restrictions,
&master_pub,
&wa->master_sig))
{
/* bogus reply */
GNUNET_break_op (0);
wr.hr.http_status = 0;
wr.hr.ec = TALER_EC_EXCHANGE_WIRE_SIGNATURE_INVALID;
break;
}
if ( (GNUNET_OK !=
parse_restrictions (credit_restrictions,
&wa->credit_restrictions_length,
&wa->credit_restrictions)) ||
(GNUNET_OK !=
parse_restrictions (debit_restrictions,
&wa->debit_restrictions_length,
&wa->debit_restrictions)) )
{
/* bogus reply */
GNUNET_break_op (0);
wr.hr.http_status = 0;
wr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED;
break;
}
GNUNET_JSON_parse_free (spec_account);
} /* end 'for all accounts */
if ( (0 != wr.hr.http_status) &&
(NULL != wh->cb) )
else if (NULL != wh->cb)
{
wh->cb (wh->cb_cls,
&wr);
wh->cb = NULL;
}
free_accounts (was,
TALER_EXCHANGE_free_accounts (was,
wr.details.ok.accounts_len);
} /* end of 'parse accounts */
free_fees (fbm,