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/* Copyright (c) 2002-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "buffer.h"
#include "hex-binary.h"
static void
binary_to_hex_case(unsigned char *dest, const unsigned char *data,
size_t size, bool ucase)
{
unsigned char *p;
char base_char;
size_t i;
int value;
/* @UNSAFE */
base_char = ucase ? 'A' : 'a';
p = dest;
for (i = 0; i < size; i++) {
value = data[i] >> 4;
*p++ = value < 10 ? value + '0' : value - 10 + base_char;
value = data[i] & 0x0f;
*p++ = value < 10 ? value + '0' : value - 10 + base_char;
}
}
const char *binary_to_hex(const unsigned char *data, size_t size)
{
unsigned char *dest = t_malloc_no0(MALLOC_MULTIPLY(size, 2) + 1);
binary_to_hex_case(dest, data, size, FALSE);
dest[size*2] = '\0';
return (char *)dest;
}
const char *binary_to_hex_ucase(const unsigned char *data, size_t size)
{
unsigned char *dest = t_malloc_no0(MALLOC_MULTIPLY(size, 2) + 1);
binary_to_hex_case(dest, data, size, TRUE);
dest[size*2] = '\0';
return (char *)dest;
}
void binary_to_hex_append(string_t *dest, const unsigned char *data,
size_t size)
{
unsigned char *buf;
buf = buffer_append_space_unsafe(dest, size * 2);
binary_to_hex_case(buf, data, size, FALSE);
}
int hex_to_binary(const char *data, buffer_t *dest)
{
int value;
while (*data != '\0') {
if (*data >= '0' && *data <= '9')
value = (*data - '0') << 4;
else if (*data >= 'a' && *data <= 'f')
value = (*data - 'a' + 10) << 4;
else if (*data >= 'A' && *data <= 'F')
value = (*data - 'A' + 10) << 4;
else
return -1;
data++;
if (*data >= '0' && *data <= '9')
value |= *data - '0';
else if (*data >= 'a' && *data <= 'f')
value |= *data - 'a' + 10;
else if (*data >= 'A' && *data <= 'F')
value |= *data - 'A' + 10;
else
return -1;
buffer_append_c(dest, value);
data++;
}
return 0;
}
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