/*
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
*/
/**
* @file pq/pq_result_helper.c
* @brief functions to initialize parameter arrays
* @author Christian Grothoff
*/
#include "platform.h"
#include
#include "pq_common.h"
#include "taler_pq_lib.h"
/**
* Extract a currency amount from a query result according to the
* given specification.
*
* @param result the result to extract the amount from
* @param row which row of the result to extract the amount from (needed as results can have multiple rows)
* @param currency currency to use for @a r_amount_nbo
* @param val_name name of the column with the amount's "value", must include the substring "_val".
* @param frac_name name of the column with the amount's "fractional" value, must include the substring "_frac".
* @param[out] r_amount_nbo where to store the amount, in network byte order
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_NO if at least one result was NULL
* #GNUNET_SYSERR if a result was invalid (non-existing field)
*/
static enum GNUNET_GenericReturnValue
extract_amount_nbo_helper (PGresult *result,
int row,
const char *currency,
const char *val_name,
const char *frac_name,
struct TALER_AmountNBO *r_amount_nbo)
{
int val_num;
int frac_num;
int len;
/* These checks are simply to check that clients obey by our naming
conventions, and not for any functional reason */
GNUNET_assert (NULL !=
strstr (val_name,
"_val"));
GNUNET_assert (NULL !=
strstr (frac_name,
"_frac"));
/* Set return value to invalid in case we don't finish */
memset (r_amount_nbo,
0,
sizeof (struct TALER_AmountNBO));
val_num = PQfnumber (result,
val_name);
frac_num = PQfnumber (result,
frac_name);
if (val_num < 0)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Field `%s' does not exist in result\n",
val_name);
return GNUNET_SYSERR;
}
if (frac_num < 0)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Field `%s' does not exist in result\n",
frac_name);
return GNUNET_SYSERR;
}
if ( (PQgetisnull (result,
row,
val_num)) ||
(PQgetisnull (result,
row,
frac_num)) )
{
return GNUNET_NO;
}
/* Note that Postgres stores value in NBO internally,
so no conversion needed in this case */
r_amount_nbo->value = *(uint64_t *) PQgetvalue (result,
row,
val_num);
r_amount_nbo->fraction = *(uint32_t *) PQgetvalue (result,
row,
frac_num);
if (GNUNET_ntohll (r_amount_nbo->value) >= TALER_AMOUNT_MAX_VALUE)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Field `%s' exceeds legal range\n",
val_name);
return GNUNET_SYSERR;
}
if (ntohl (r_amount_nbo->fraction) >= TALER_AMOUNT_FRAC_BASE)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Field `%s' exceeds legal range\n",
frac_name);
return GNUNET_SYSERR;
}
len = GNUNET_MIN (TALER_CURRENCY_LEN - 1,
strlen (currency));
GNUNET_memcpy (r_amount_nbo->currency,
currency,
len);
return GNUNET_OK;
}
/**
* Extract data from a Postgres database @a result at row @a row.
*
* @param cls closure, a `const char *` giving the currency
* @param result where to extract data from
* @param row row to extract data from
* @param fname name (or prefix) of the fields to extract from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_NO if at least one result was NULL
* #GNUNET_SYSERR if a result was invalid (non-existing field)
*/
static enum GNUNET_GenericReturnValue
extract_amount_nbo (void *cls,
PGresult *result,
int row,
const char *fname,
size_t *dst_size,
void *dst)
{
const char *currency = cls;
char *val_name;
char *frac_name;
enum GNUNET_GenericReturnValue ret;
if (sizeof (struct TALER_AmountNBO) != *dst_size)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_asprintf (&val_name,
"%s_val",
fname);
GNUNET_asprintf (&frac_name,
"%s_frac",
fname);
ret = extract_amount_nbo_helper (result,
row,
currency,
val_name,
frac_name,
dst);
GNUNET_free (val_name);
GNUNET_free (frac_name);
return ret;
}
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_amount_nbo (const char *name,
const char *currency,
struct TALER_AmountNBO *amount)
{
struct GNUNET_PQ_ResultSpec res = {
.conv = &extract_amount_nbo,
.cls = (void *) currency,
.dst = (void *) amount,
.dst_size = sizeof (*amount),
.fname = name
};
return res;
}
/**
* Extract data from a Postgres database @a result at row @a row.
*
* @param cls closure, a `const char *` giving the currency
* @param result where to extract data from
* @param row row to extract data from
* @param fname name (or prefix) of the fields to extract from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_NO if at least one result was NULL
* #GNUNET_SYSERR if a result was invalid (non-existing field)
*/
static enum GNUNET_GenericReturnValue
extract_amount (void *cls,
PGresult *result,
int row,
const char *fname,
size_t *dst_size,
void *dst)
{
const char *currency = cls;
struct TALER_Amount *r_amount = dst;
char *val_name;
char *frac_name;
struct TALER_AmountNBO amount_nbo;
enum GNUNET_GenericReturnValue ret;
if (sizeof (struct TALER_AmountNBO) != *dst_size)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_asprintf (&val_name,
"%s_val",
fname);
GNUNET_asprintf (&frac_name,
"%s_frac",
fname);
ret = extract_amount_nbo_helper (result,
row,
currency,
val_name,
frac_name,
&amount_nbo);
if (GNUNET_OK == ret)
TALER_amount_ntoh (r_amount,
&amount_nbo);
else
memset (r_amount,
0,
sizeof (struct TALER_Amount));
GNUNET_free (val_name);
GNUNET_free (frac_name);
return ret;
}
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_amount (const char *name,
const char *currency,
struct TALER_Amount *amount)
{
struct GNUNET_PQ_ResultSpec res = {
.conv = &extract_amount,
.cls = (void *) currency,
.dst = (void *) amount,
.dst_size = sizeof (*amount),
.fname = name
};
return res;
}
/**
* Extract an amount from a tuple from a Postgres database @a result at row @a row.
*
* @param cls closure, a `const char *` giving the currency
* @param result where to extract data from
* @param row row to extract data from
* @param fname name (or prefix) of the fields to extract from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_NO if at least one result was NULL
* #GNUNET_SYSERR if a result was invalid (non-existing field)
*/
static enum GNUNET_GenericReturnValue
extract_amount_tuple (void *cls,
PGresult *result,
int row,
const char *fname,
size_t *dst_size,
void *dst)
{
struct TALER_Amount *r_amount = dst;
const char *currency = cls;
int col;
int len;
if (sizeof (struct TALER_Amount) != *dst_size)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
/* Set return value to invalid in case we don't finish */
memset (r_amount,
0,
sizeof (struct TALER_Amount));
col = PQfnumber (result,
fname);
if (col < 0)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Field `%s' does not exist in result\n",
fname);
return GNUNET_SYSERR;
}
if (PQgetisnull (result,
row,
col))
{
return GNUNET_NO;
}
/* Parse the tuple */
{
char *in;
uint32_t num;
struct TALER_PQ_Amount_P ap;
int size;
const static int expected_size = sizeof(uint32_t) /* length */
+ sizeof(struct TALER_PQ_Amount_P);
size = PQgetlength (result,
row,
col);
if (expected_size != size)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Incorrect size of binary field `%s' (got %d, expected %d)\n",
fname,
size,
expected_size);
return GNUNET_SYSERR;
}
in = PQgetvalue (result,
row,
col);
num = ntohl (*(uint32_t *) in);
if (2 != num)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Incorrect number of elements in tuple-field `%s'\n",
fname);
return GNUNET_SYSERR;
}
in += sizeof(uint32_t);
ap = *(struct TALER_PQ_Amount_P *) in;
/* TODO[oec]: OID-checks? */
r_amount->value = GNUNET_ntohll (ap.v);
r_amount->fraction = ntohl (ap.f);
}
if (r_amount->value >= TALER_AMOUNT_MAX_VALUE)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Value in field `%s' exceeds legal range\n",
fname);
return GNUNET_SYSERR;
}
if (r_amount->fraction >= TALER_AMOUNT_FRAC_BASE)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Fraction in field `%s' exceeds legal range\n",
fname);
return GNUNET_SYSERR;
}
len = GNUNET_MIN (TALER_CURRENCY_LEN - 1,
strlen (currency));
GNUNET_memcpy (r_amount->currency,
currency,
len);
return GNUNET_OK;
}
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_amount_tuple (const char *name,
const char *currency,
struct TALER_Amount *amount)
{
struct GNUNET_PQ_ResultSpec res = {
.conv = &extract_amount_tuple,
.cls = (void *) currency,
.dst = (void *) amount,
.dst_size = sizeof (*amount),
.fname = name
};
return res;
}
/**
* Extract data from a Postgres database @a result at row @a row.
*
* @param cls closure
* @param result where to extract data from
* @param row row to extract data from
* @param fname name (or prefix) of the fields to extract from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_NO if at least one result was NULL
* #GNUNET_SYSERR if a result was invalid (non-existing field)
*/
static enum GNUNET_GenericReturnValue
extract_json (void *cls,
PGresult *result,
int row,
const char *fname,
size_t *dst_size,
void *dst)
{
json_t **j_dst = dst;
const char *res;
int fnum;
json_error_t json_error;
size_t slen;
(void) cls;
(void) dst_size;
fnum = PQfnumber (result,
fname);
if (fnum < 0)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Field `%s' does not exist in result\n",
fname);
return GNUNET_SYSERR;
}
if (PQgetisnull (result,
row,
fnum))
return GNUNET_NO;
slen = PQgetlength (result,
row,
fnum);
res = (const char *) PQgetvalue (result,
row,
fnum);
*j_dst = json_loadb (res,
slen,
JSON_REJECT_DUPLICATES,
&json_error);
if (NULL == *j_dst)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to parse JSON result for field `%s': %s (%s)\n",
fname,
json_error.text,
json_error.source);
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Function called to clean up memory allocated
* by a #GNUNET_PQ_ResultConverter.
*
* @param cls closure
* @param rd result data to clean up
*/
static void
clean_json (void *cls,
void *rd)
{
json_t **dst = rd;
(void) cls;
if (NULL != *dst)
{
json_decref (*dst);
*dst = NULL;
}
}
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_json (const char *name,
json_t **jp)
{
struct GNUNET_PQ_ResultSpec res = {
.conv = &extract_json,
.cleaner = &clean_json,
.dst = (void *) jp,
.fname = name
};
return res;
}
/**
* Extract data from a Postgres database @a result at row @a row.
*
* @param cls closure
* @param result where to extract data from
* @param row the row to extract data from
* @param fname name (or prefix) of the fields to extract from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
*/
static enum GNUNET_GenericReturnValue
extract_denom_pub (void *cls,
PGresult *result,
int row,
const char *fname,
size_t *dst_size,
void *dst)
{
struct TALER_DenominationPublicKey *pk = dst;
size_t len;
const char *res;
int fnum;
uint32_t be[2];
(void) cls;
(void) dst_size;
fnum = PQfnumber (result,
fname);
if (fnum < 0)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
if (PQgetisnull (result,
row,
fnum))
return GNUNET_NO;
/* if a field is null, continue but
* remember that we now return a different result */
len = PQgetlength (result,
row,
fnum);
res = PQgetvalue (result,
row,
fnum);
if (len < sizeof (be))
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_memcpy (be,
res,
sizeof (be));
res += sizeof (be);
len -= sizeof (be);
pk->cipher = ntohl (be[0]);
pk->age_mask.bits = ntohl (be[1]);
switch (pk->cipher)
{
case TALER_DENOMINATION_RSA:
pk->details.rsa_public_key
= GNUNET_CRYPTO_rsa_public_key_decode (res,
len);
if (NULL == pk->details.rsa_public_key)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
case TALER_DENOMINATION_CS:
if (sizeof (pk->details.cs_public_key) != len)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_memcpy (&pk->details.cs_public_key,
res,
len);
return GNUNET_OK;
default:
GNUNET_break (0);
}
return GNUNET_SYSERR;
}
/**
* Function called to clean up memory allocated
* by a #GNUNET_PQ_ResultConverter.
*
* @param cls closure
* @param rd result data to clean up
*/
static void
clean_denom_pub (void *cls,
void *rd)
{
struct TALER_DenominationPublicKey *denom_pub = rd;
(void) cls;
TALER_denom_pub_free (denom_pub);
}
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_denom_pub (const char *name,
struct TALER_DenominationPublicKey *denom_pub)
{
struct GNUNET_PQ_ResultSpec res = {
.conv = &extract_denom_pub,
.cleaner = &clean_denom_pub,
.dst = (void *) denom_pub,
.fname = name
};
return res;
}
/**
* Extract data from a Postgres database @a result at row @a row.
*
* @param cls closure
* @param result where to extract data from
* @param row the row to extract data from
* @param fname name (or prefix) of the fields to extract from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
*/
static enum GNUNET_GenericReturnValue
extract_denom_sig (void *cls,
PGresult *result,
int row,
const char *fname,
size_t *dst_size,
void *dst)
{
struct TALER_DenominationSignature *sig = dst;
size_t len;
const char *res;
int fnum;
uint32_t be[2];
(void) cls;
(void) dst_size;
fnum = PQfnumber (result,
fname);
if (fnum < 0)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
if (PQgetisnull (result,
row,
fnum))
return GNUNET_NO;
/* if a field is null, continue but
* remember that we now return a different result */
len = PQgetlength (result,
row,
fnum);
res = PQgetvalue (result,
row,
fnum);
if (len < sizeof (be))
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_memcpy (&be,
res,
sizeof (be));
if (0x00 != ntohl (be[1]))
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
res += sizeof (be);
len -= sizeof (be);
sig->cipher = ntohl (be[0]);
switch (sig->cipher)
{
case TALER_DENOMINATION_RSA:
sig->details.rsa_signature
= GNUNET_CRYPTO_rsa_signature_decode (res,
len);
if (NULL == sig->details.rsa_signature)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
case TALER_DENOMINATION_CS:
if (sizeof (sig->details.cs_signature) != len)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_memcpy (&sig->details.cs_signature,
res,
len);
return GNUNET_OK;
default:
GNUNET_break (0);
}
return GNUNET_SYSERR;
}
/**
* Function called to clean up memory allocated
* by a #GNUNET_PQ_ResultConverter.
*
* @param cls closure
* @param rd result data to clean up
*/
static void
clean_denom_sig (void *cls,
void *rd)
{
struct TALER_DenominationSignature *denom_sig = rd;
(void) cls;
TALER_denom_sig_free (denom_sig);
}
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_denom_sig (const char *name,
struct TALER_DenominationSignature *denom_sig)
{
struct GNUNET_PQ_ResultSpec res = {
.conv = &extract_denom_sig,
.cleaner = &clean_denom_sig,
.dst = (void *) denom_sig,
.fname = name
};
return res;
}
/**
* Extract data from a Postgres database @a result at row @a row.
*
* @param cls closure
* @param result where to extract data from
* @param row the row to extract data from
* @param fname name (or prefix) of the fields to extract from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
*/
static enum GNUNET_GenericReturnValue
extract_blinded_denom_sig (void *cls,
PGresult *result,
int row,
const char *fname,
size_t *dst_size,
void *dst)
{
struct TALER_BlindedDenominationSignature *sig = dst;
size_t len;
const char *res;
int fnum;
uint32_t be[2];
(void) cls;
(void) dst_size;
fnum = PQfnumber (result,
fname);
if (fnum < 0)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
if (PQgetisnull (result,
row,
fnum))
return GNUNET_NO;
/* if a field is null, continue but
* remember that we now return a different result */
len = PQgetlength (result,
row,
fnum);
res = PQgetvalue (result,
row,
fnum);
if (len < sizeof (be))
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_memcpy (&be,
res,
sizeof (be));
if (0x01 != ntohl (be[1])) /* magic marker: blinded */
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
res += sizeof (be);
len -= sizeof (be);
sig->cipher = ntohl (be[0]);
switch (sig->cipher)
{
case TALER_DENOMINATION_RSA:
sig->details.blinded_rsa_signature
= GNUNET_CRYPTO_rsa_signature_decode (res,
len);
if (NULL == sig->details.blinded_rsa_signature)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
case TALER_DENOMINATION_CS:
if (sizeof (sig->details.blinded_cs_answer) != len)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_memcpy (&sig->details.blinded_cs_answer,
res,
len);
return GNUNET_OK;
default:
GNUNET_break (0);
}
return GNUNET_SYSERR;
}
/**
* Function called to clean up memory allocated
* by a #GNUNET_PQ_ResultConverter.
*
* @param cls closure
* @param rd result data to clean up
*/
static void
clean_blinded_denom_sig (void *cls,
void *rd)
{
struct TALER_BlindedDenominationSignature *denom_sig = rd;
(void) cls;
TALER_blinded_denom_sig_free (denom_sig);
}
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_blinded_denom_sig (
const char *name,
struct TALER_BlindedDenominationSignature *denom_sig)
{
struct GNUNET_PQ_ResultSpec res = {
.conv = &extract_blinded_denom_sig,
.cleaner = &clean_blinded_denom_sig,
.dst = (void *) denom_sig,
.fname = name
};
return res;
}
/**
* Extract data from a Postgres database @a result at row @a row.
*
* @param cls closure
* @param result where to extract data from
* @param row the row to extract data from
* @param fname name (or prefix) of the fields to extract from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
*/
static enum GNUNET_GenericReturnValue
extract_blinded_planchet (void *cls,
PGresult *result,
int row,
const char *fname,
size_t *dst_size,
void *dst)
{
struct TALER_BlindedPlanchet *bp = dst;
size_t len;
const char *res;
int fnum;
uint32_t be[2];
(void) cls;
(void) dst_size;
fnum = PQfnumber (result,
fname);
if (fnum < 0)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
if (PQgetisnull (result,
row,
fnum))
return GNUNET_NO;
/* if a field is null, continue but
* remember that we now return a different result */
len = PQgetlength (result,
row,
fnum);
res = PQgetvalue (result,
row,
fnum);
if (len < sizeof (be))
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_memcpy (&be,
res,
sizeof (be));
if (0x0100 != ntohl (be[1])) /* magic marker: blinded */
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
res += sizeof (be);
len -= sizeof (be);
bp->cipher = ntohl (be[0]);
switch (bp->cipher)
{
case TALER_DENOMINATION_RSA:
bp->details.rsa_blinded_planchet.blinded_msg_size
= len;
bp->details.rsa_blinded_planchet.blinded_msg
= GNUNET_memdup (res,
len);
return GNUNET_OK;
case TALER_DENOMINATION_CS:
if (sizeof (bp->details.cs_blinded_planchet) != len)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_memcpy (&bp->details.cs_blinded_planchet,
res,
len);
return GNUNET_OK;
default:
GNUNET_break (0);
}
return GNUNET_SYSERR;
}
/**
* Function called to clean up memory allocated
* by a #GNUNET_PQ_ResultConverter.
*
* @param cls closure
* @param rd result data to clean up
*/
static void
clean_blinded_planchet (void *cls,
void *rd)
{
struct TALER_BlindedPlanchet *bp = rd;
(void) cls;
TALER_blinded_planchet_free (bp);
}
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_blinded_planchet (
const char *name,
struct TALER_BlindedPlanchet *bp)
{
struct GNUNET_PQ_ResultSpec res = {
.conv = &extract_blinded_planchet,
.cleaner = &clean_blinded_planchet,
.dst = (void *) bp,
.fname = name
};
return res;
}
/**
* Extract data from a Postgres database @a result at row @a row.
*
* @param cls closure
* @param result where to extract data from
* @param row row to extract data from
* @param fname name (or prefix) of the fields to extract from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
*/
static enum GNUNET_GenericReturnValue
extract_exchange_withdraw_values (void *cls,
PGresult *result,
int row,
const char *fname,
size_t *dst_size,
void *dst)
{
struct TALER_ExchangeWithdrawValues *alg_values = dst;
size_t len;
const char *res;
int fnum;
uint32_t be[2];
(void) cls;
(void) dst_size;
fnum = PQfnumber (result,
fname);
if (fnum < 0)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
if (PQgetisnull (result,
row,
fnum))
return GNUNET_NO;
/* if a field is null, continue but
* remember that we now return a different result */
len = PQgetlength (result,
row,
fnum);
res = PQgetvalue (result,
row,
fnum);
if (len < sizeof (be))
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_memcpy (&be,
res,
sizeof (be));
if (0x010000 != ntohl (be[1])) /* magic marker: EWV */
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
res += sizeof (be);
len -= sizeof (be);
alg_values->cipher = ntohl (be[0]);
switch (alg_values->cipher)
{
case TALER_DENOMINATION_RSA:
if (0 != len)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
return GNUNET_OK;
case TALER_DENOMINATION_CS:
if (sizeof (struct TALER_DenominationCSPublicRPairP) != len)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_memcpy (&alg_values->details.cs_values,
res,
len);
return GNUNET_OK;
default:
GNUNET_break (0);
}
return GNUNET_SYSERR;
}
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_exchange_withdraw_values (
const char *name,
struct TALER_ExchangeWithdrawValues *ewv)
{
struct GNUNET_PQ_ResultSpec res = {
.conv = &extract_exchange_withdraw_values,
.dst = (void *) ewv,
.fname = name
};
return res;
}
/**
* Closure for the array result specifications. Contains type information
* for the generic parser extract_array_generic and out-pointers for the results.
*/
struct ArrayResultCls
{
/* Oid of the expected type, must match the oid in the header of the PQResult struct */
Oid oid;
/* Target type */
enum TALER_PQ_ArrayType typ;
/* If not 0, defines the expected size of each entry */
size_t same_size;
/* Out-pointer to write the number of elements in the array */
size_t *num;
/* Out-pointer. If @a typ is TALER_PQ_array_of_byte and @a same_size is 0,
* allocate and put the array of @a num sizes here. NULL otherwise */
size_t **sizes;
};
/**
* Extract data from a Postgres database @a result as array of a specific type
* from row @a row. The type information and optionally additional
* out-parameters are given in @a cls which is of type array_result_cls.
*
* @param cls closure of type array_result_cls
* @param result where to extract data from
* @param row row to extract data from
* @param fname name (or prefix) of the fields to extract from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
*/
static enum GNUNET_GenericReturnValue
extract_array_generic (
void *cls,
PGresult *result,
int row,
const char *fname,
size_t *dst_size,
void *dst)
{
const struct ArrayResultCls *info = cls;
int data_sz;
char *data;
void *out = NULL;
struct TALER_PQ_ArrayHeader_P header;
int col_num;
GNUNET_assert (NULL != dst);
*((void **) dst) = NULL;
#define FAIL_IF(cond) \
do { \
if ((cond)) \
{ \
GNUNET_break (! (cond)); \
goto FAIL; \
} \
} while(0)
col_num = PQfnumber (result, fname);
FAIL_IF (0 > col_num);
data_sz = PQgetlength (result, row, col_num);
FAIL_IF (0 > data_sz);
FAIL_IF (sizeof(header) > (size_t) data_sz);
data = PQgetvalue (result, row, col_num);
FAIL_IF (NULL == data);
{
struct TALER_PQ_ArrayHeader_P *h =
(struct TALER_PQ_ArrayHeader_P *) data;
header.ndim = ntohl (h->ndim);
header.has_null = ntohl (h->has_null);
header.oid = ntohl (h->oid);
header.dim = ntohl (h->dim);
header.lbound = ntohl (h->lbound);
FAIL_IF (1 != header.ndim);
FAIL_IF (INT_MAX <= header.dim);
FAIL_IF (0 != header.has_null);
FAIL_IF (1 != header.lbound);
FAIL_IF (info->oid != header.oid);
}
if (NULL != info->num)
*info->num = header.dim;
{
char *in = data + sizeof(header);
switch (info->typ)
{
case TALER_PQ_array_of_denom_hash:
if (NULL != dst_size)
*dst_size = sizeof(struct TALER_DenominationHashP) * (header.dim);
out = GNUNET_new_array (header.dim, struct TALER_DenominationHashP);
*((void **) dst) = out;
for (uint32_t i = 0; i < header.dim; i++)
{
size_t sz = ntohl (*(uint32_t *) in);
FAIL_IF (sz != sizeof(struct TALER_DenominationHashP));
in += sizeof(uint32_t);
*(struct TALER_DenominationHashP *) out =
*(struct TALER_DenominationHashP *) in;
in += sz;
out += sz;
}
return GNUNET_OK;
case TALER_PQ_array_of_blinded_coin_hash:
if (NULL != dst_size)
*dst_size = sizeof(struct TALER_BlindedCoinHashP) * (header.dim);
out = GNUNET_new_array (header.dim, struct TALER_BlindedCoinHashP);
*((void **) dst) = out;
for (uint32_t i = 0; i < header.dim; i++)
{
size_t sz = ntohl (*(uint32_t *) in);
FAIL_IF (sz != sizeof(struct TALER_BlindedCoinHashP));
in += sizeof(uint32_t);
*(struct TALER_BlindedCoinHashP *) out =
*(struct TALER_BlindedCoinHashP *) in;
in += sz;
out += sz;
}
return GNUNET_OK;
case TALER_PQ_array_of_blinded_denom_sig:
{
struct TALER_BlindedDenominationSignature *denom_sigs;
if (0 == header.dim)
{
if (NULL != dst_size)
*dst_size = 0;
break;
}
denom_sigs = GNUNET_new_array (header.dim,
struct TALER_BlindedDenominationSignature);
*((void **) dst) = denom_sigs;
/* copy data */
for (uint32_t i = 0; i < header.dim; i++)
{
struct TALER_BlindedDenominationSignature *denom_sig = &denom_sigs[i];
uint32_t be[2];
size_t sz = ntohl (*(uint32_t *) in);
in += sizeof(uint32_t);
FAIL_IF (sizeof(be) > sz);
GNUNET_memcpy (&be,
in,
sizeof(be));
FAIL_IF (0x01 != ntohl (be[1])); /* magic marker: blinded */
in += sizeof(be);
sz -= sizeof(be);
denom_sig->cipher = ntohl (be[0]);
switch (denom_sig->cipher)
{
case TALER_DENOMINATION_RSA:
denom_sig->details.blinded_rsa_signature =
GNUNET_CRYPTO_rsa_signature_decode (in,
sz);
FAIL_IF (NULL == denom_sig->details.blinded_rsa_signature);
break;
case TALER_DENOMINATION_CS:
FAIL_IF (sizeof(denom_sig->details.blinded_cs_answer) != sz);
GNUNET_memcpy (&denom_sig->details.blinded_cs_answer,
in,
sz);
break;
default:
FAIL_IF (true);
}
in += sz;
}
return GNUNET_OK;
}
default:
FAIL_IF (true);
}
}
FAIL:
GNUNET_free (*(void **) dst);
return GNUNET_SYSERR;
#undef FAIL_IF
}
/**
* Cleanup of the data and closure of an array spec.
*/
static void
array_cleanup (void *cls,
void *rd)
{
struct ArrayResultCls *info = cls;
void **dst = rd;
if ((0 == info->same_size) &&
(NULL != info->sizes))
GNUNET_free (*(info->sizes));
GNUNET_free (cls);
GNUNET_free (*dst);
*dst = NULL;
}
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_array_blinded_denom_sig (
const struct GNUNET_PQ_Context *db,
const char *name,
size_t *num,
struct TALER_BlindedDenominationSignature **denom_sigs)
{
struct ArrayResultCls *info = GNUNET_new (struct ArrayResultCls);
info->num = num;
info->typ = TALER_PQ_array_of_blinded_denom_sig;
info->oid = GNUNET_PQ_get_oid (db,
GNUNET_PQ_DATATYPE_BYTEA);
struct GNUNET_PQ_ResultSpec res = {
.conv = extract_array_generic,
.cleaner = array_cleanup,
.dst = (void *) denom_sigs,
.fname = name,
.cls = info
};
return res;
};
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_array_blinded_coin_hash (
const struct GNUNET_PQ_Context *db,
const char *name,
size_t *num,
struct TALER_BlindedCoinHashP **h_coin_evs)
{
struct ArrayResultCls *info = GNUNET_new (struct ArrayResultCls);
info->num = num;
info->typ = TALER_PQ_array_of_blinded_coin_hash;
info->oid = GNUNET_PQ_get_oid (db,
GNUNET_PQ_DATATYPE_BYTEA);
struct GNUNET_PQ_ResultSpec res = {
.conv = extract_array_generic,
.cleaner = array_cleanup,
.dst = (void *) h_coin_evs,
.fname = name,
.cls = info
};
return res;
};
struct GNUNET_PQ_ResultSpec
TALER_PQ_result_spec_array_denom_hash (
const struct GNUNET_PQ_Context *db,
const char *name,
size_t *num,
struct TALER_DenominationHashP **denom_hs)
{
struct ArrayResultCls *info = GNUNET_new (struct ArrayResultCls);
info->num = num;
info->typ = TALER_PQ_array_of_denom_hash;
info->oid = GNUNET_PQ_get_oid (db,
GNUNET_PQ_DATATYPE_BYTEA);
struct GNUNET_PQ_ResultSpec res = {
.conv = extract_array_generic,
.cleaner = array_cleanup,
.dst = (void *) denom_hs,
.fname = name,
.cls = info
};
return res;
};
/* end of pq_result_helper.c */