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/* Output raw bytes, for libreswan
*
* Copyright (C) 2017, 2019 Andrew Cagney
*
* This program 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 2 of the License, or (at your
* option) any later version. See <https://www.gnu.org/licenses/gpl2.txt>.
*
* This program 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.
*
*/
#include "jambuf.h"
#include "chunk.h"
#include "ttodata.h" /* for datatot() */
#include "passert.h"
size_t jam_hex_bytes(struct jambuf *buf, const void *ptr, size_t size)
{
size_t n = 0;
const uint8_t *bytes = ptr;
for (unsigned i = 0; i < size; i++) {
n += jam(buf, "%02x", bytes[i]);
}
return n;
}
size_t jam_HEX_bytes(struct jambuf *buf, const void *ptr, size_t size)
{
size_t n = 0;
const uint8_t *bytes = ptr;
for (unsigned i = 0; i < size; i++) {
n += jam(buf, "%02X", bytes[i]);
}
return n;
}
/*
* Roughly mimic DBG_dump(): use a space separator; and after the 4th
* byte, a double space separator.
*
* This is so that values dumped by DBG_dump() and lswlog_bytes() have
* the same 'look' - make searching and grepping easier.
*/
size_t jam_dump_bytes(struct jambuf *buf, const void *bytes, size_t size)
{
if (size == 0) {
return 0;
} else if (bytes == NULL) {
/* will inject "(null)" or error */
return jam_string(buf, NULL);
}
size_t n = 0;
const uint8_t *byte = bytes;
const uint8_t *end = byte + size;
const char *sep = "";
while (byte < end) {
for (unsigned b = 0; b < 4 && byte < end; b++) {
n += jam(buf, "%s%02x", sep, *byte++);
sep = " ";
}
sep = " ";
}
return n;
}
/*
* For logging - output the string but convert any unprintable
* characters into an equivalent escape code.
*
* Notes:
*
* - NUL is always represented as '\0'.
*
* - octal format can use up-to 3 digts but can't be ambiguous, so
* only use when next character isn't numeric
*
* hence need to pass to characters to jam_sanitized_char().
*/
static size_t jam_control(struct jambuf *buf, char c, char c1)
{
switch (c) {
case '\0': return jam_string(buf, "\\0");
case '\a': return jam_string(buf, "\\a");
case '\b': return jam_string(buf, "\\b");
case '\t': return jam_string(buf, "\\t");
case '\n': return jam_string(buf, "\\n");
case '\v': return jam_string(buf, "\\v");
case '\f': return jam_string(buf, "\\f");
case '\r': return jam_string(buf, "\\r");
}
if (char_isdigit(c1)) {
/* force \OOO when next char is digit */
return jam(buf, "\\%03o", c & 0xFF);
}
return jam(buf, "\\%o", c & 0xFF);
}
size_t jam_sanitized_bytes(struct jambuf *buf, const void *ptr, size_t size)
{
size_t n = 0;
const char *chars = ptr;
for (unsigned i = 0; i < size; i++) {
char c = chars[i];
if (char_isprint(c)) {
n += jam_char(buf, c);
} else {
/* handle \0001 */
char c1 = (i + 1 == size ? '\0' : chars[i+1]);
n += jam_control(buf, c, c1);
}
}
return n;
}
/*
* For shell variables. Output the string in a format suitable for
* use by shell scripts, but wrapped in single quotes.
*
* XXX: bonus points for anyone encoding \r \n ... correctly? But is
* it even safe?
*/
size_t jam_shell_quoted_bytes(struct jambuf *buf, const void *ptr, size_t size)
{
size_t n = 0;
const char *chars = ptr;
for (unsigned i = 0; i < size; i++) {
char c = chars[i];
switch (c) {
case '\'':
case '\\':
case '"':
case '`':
case '$':
n += jam(buf, "\\%03o", c & 0xFF);
break;
default:
if (char_isprint(c)) {
n += jam_char(buf, c);
} else {
n += jam(buf, "\\%03o", c & 0xFF);
}
break;
}
}
return n;
}
size_t jam_uppercase_bytes(struct jambuf *buf, const void *ptr, size_t size)
{
size_t n = 0;
const char *chars = ptr;
for (unsigned i = 0; i < size; i++) {
char c = chars[i];
if (char_isprint(c)) {
n += jam_char(buf, char_toupper(c));
} else {
/* handles \0001 */
char c1 = (i + 1 == size ? '\0' : chars[i+1]);
n += jam_control(buf, c, c1);
}
}
return n;
}
size_t jam_string_uppercase(struct jambuf *buf, const char *string)
{
return jam_uppercase_bytes(buf, string, strlen(string));
}
size_t jam_human_bytes(struct jambuf *buf, const void *ptr, size_t size)
{
size_t n = 0;
const char *chars = ptr;
for (unsigned i = 0; i < size; i++) {
char c = chars[i];
if (c == '_') {
n += jam_char(buf, '-');
} else if (char_isprint(c)) {
n += jam_char(buf, char_tolower(c));
} else {
/* handles \0001 */
char c1 = (i + 1 == size ? '\0' : chars[i+1]);
n += jam_control(buf, c, c1);
}
}
return n;
}
size_t jam_string_human(struct jambuf *buf, const char *string)
{
if (string == NULL) {
/* will inject "(null)" or error */
return jam_string(buf, NULL);
}
return jam_human_bytes(buf, string, strlen(string));
}
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