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/* vi: set sw=4 ts=4:
*
* Copyright (C) 2020 Christian Hohnstaedt.
*
* All rights reserved.
*/
#include "BioByteArray.h"
#include "func_base.h"
#include <QDebug>
BioByteArray::BioByteArray(const BIGNUM *bn, int bits)
{
int len = (bits+7) >> 3;
qDebug() << bits << len;
if (!bn)
return;
store.resize(BN_num_bytes(bn));
BN_bn2bin(bn, (unsigned char *)store.data());
openssl_error();
if (store.size() > 0 && (unsigned char)store[0] >= 0x80)
store.prepend('\0');
if (len > 0 && store.size() < len)
store.prepend(len - store.size(), 0);
}
void BioByteArray::set(const QByteArray &qba)
{
if (read_write) {
char buf[1024];
qWarning() << "BioByteArray already in use";
while (BIO_read(read_write, buf, sizeof buf) > 0)
;
memset(buf, 0, sizeof buf);
}
store.fill(0);
store.clear();
add(qba);
}
void BioByteArray::add(const QByteArray &qba)
{
if (read_only) {
qWarning() << "BioByteArray is read-only";
return;
}
if (read_write)
biowrite(qba);
else
store += qba;
}
void BioByteArray::biowrite(const QByteArray &qba)
{
BIO_write(read_write, qba.data(), qba.size());
}
void BioByteArray::cleanse_and_free(BIO *bio)
{
if (!bio)
return;
char *p;
long l = BIO_get_mem_data(bio, &p);
OPENSSL_cleanse(p, l);
BIO_free(bio);
}
BioByteArray::~BioByteArray()
{
store.fill(0);
store.clear();
cleanse_and_free(read_write);
if (read_only)
BIO_free(read_only);
}
BIO *BioByteArray::bio()
{
if (!read_write) {
read_write = BIO_new(BIO_s_mem());
Q_CHECK_PTR(read_write);
biowrite(store);
store.fill(0);
store.clear();
}
return read_write;
}
BIO *BioByteArray::ro()
{
if (!read_only)
read_only = BIO_new_mem_buf(
(void*)store.constData(), store.length());
Q_CHECK_PTR(read_only);
return read_only;
}
QByteArray BioByteArray::byteArray() const
{
if (read_only || !read_write)
return store;
/* "read_write" Bio may differ from "store" */
const char *p;
int l = BIO_get_mem_data(read_write, &p);
return QByteArray(p, l);
}
int BioByteArray::size() const
{
if (read_only || !read_write)
return store.size();
/* "read_write" Bio may differ from "store" */
const char *p;
return BIO_get_mem_data(read_write, &p);
}
QString BioByteArray::qstring() const
{
return QString::fromUtf8(byteArray().constData());
}
BioByteArray::operator BIO*()
{
return bio();
}
BioByteArray::operator QByteArray()
{
return byteArray();
}
BioByteArray &BioByteArray::operator = (const BioByteArray &other)
{
set(other.byteArray());
return *this;
}
BioByteArray &BioByteArray::operator = (const QByteArray &qba)
{
set(qba);
return *this;
}
BioByteArray &BioByteArray::operator += (const BioByteArray &other)
{
add(other.byteArray());
return *this;
}
BioByteArray &BioByteArray::operator += (const QByteArray &qba)
{
add(qba);
return *this;
}
QString BioByteArray::base64UrlEncode() const
{
return QString::fromLatin1(byteArray().toBase64(
QByteArray::Base64UrlEncoding |
QByteArray::OmitTrailingEquals));
}
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