mirror of
https://github.com/sgan81/apfs-fuse.git
synced 2026-10-08 18:49:03 +02:00
358 lines
8.1 KiB
C++
358 lines
8.1 KiB
C++
#include <cstdio>
|
|
#include <cstdint>
|
|
#include <cstring>
|
|
|
|
#include "Des.h"
|
|
|
|
#define rol28(v,n) ((v << n) & 0xFFFFFFF) | ((v >> (28-n)) & 0xFFFFFFF)
|
|
#define ror28(v,n) ((v >> n) & 0xFFFFFFF) | ((v << (28-n)) & 0xFFFFFFF)
|
|
|
|
DES::DES()
|
|
{
|
|
memset(m_keySchedule, 0, sizeof(m_keySchedule));
|
|
m_initVector = 0;
|
|
}
|
|
|
|
DES::~DES()
|
|
{
|
|
memset(m_keySchedule, 0, sizeof(m_keySchedule));
|
|
m_initVector = 0;
|
|
}
|
|
|
|
void DES::Encrypt(uint8_t *cipher, const uint8_t *plain, size_t size)
|
|
{
|
|
size_t off;
|
|
uint64_t r;
|
|
|
|
for (off = 0; off < size; off += 8)
|
|
{
|
|
r = BytesToU64(plain + off);
|
|
r = InitialPermutation(r);
|
|
r = EncryptInternal(r, m_keySchedule);
|
|
r = FinalPermutation(r);
|
|
U64ToBytes(cipher + off, r);
|
|
}
|
|
}
|
|
|
|
void DES::Decrypt(uint8_t *plain, const uint8_t *cipher, size_t size)
|
|
{
|
|
size_t off;
|
|
uint64_t r;
|
|
|
|
for (off = 0; off < size; off += 8)
|
|
{
|
|
r = BytesToU64(cipher + off);
|
|
r = InitialPermutation(r);
|
|
r = DecryptInternal(r, m_keySchedule);
|
|
r = FinalPermutation(r);
|
|
U64ToBytes(plain + off, r);
|
|
}
|
|
}
|
|
|
|
void DES::EncryptCBC(uint8_t *cipher, const uint8_t *plain, size_t size)
|
|
{
|
|
size_t off;
|
|
uint64_t r;
|
|
|
|
for (off = 0; off < size; off += 8)
|
|
{
|
|
r = BytesToU64(plain + off);
|
|
r = r ^ m_initVector;
|
|
r = InitialPermutation(r);
|
|
r = EncryptInternal(r, m_keySchedule);
|
|
r = FinalPermutation(r);
|
|
m_initVector = r;
|
|
U64ToBytes(cipher + off, r);
|
|
}
|
|
}
|
|
|
|
void DES::DecryptCBC(uint8_t *plain, const uint8_t *cipher, size_t size)
|
|
{
|
|
size_t off;
|
|
uint64_t r;
|
|
uint64_t iv;
|
|
|
|
for (off = 0; off < size; off += 8)
|
|
{
|
|
r = BytesToU64(cipher + off);
|
|
iv = r;
|
|
r = InitialPermutation(r);
|
|
r = DecryptInternal(r, m_keySchedule);
|
|
r = FinalPermutation(r);
|
|
r = r ^ m_initVector;
|
|
m_initVector = iv;
|
|
U64ToBytes(plain + off, r);
|
|
}
|
|
}
|
|
|
|
void DES::SetKey(const uint8_t *key)
|
|
{
|
|
memset(m_keySchedule, 0, sizeof(m_keySchedule));
|
|
m_initVector = 0;
|
|
uint64_t k = BytesToU64(key);
|
|
KeySchedule(k, m_keySchedule);
|
|
}
|
|
|
|
void DES::SetIV(const uint8_t *iv)
|
|
{
|
|
if (iv)
|
|
m_initVector = BytesToU64(iv);
|
|
else
|
|
m_initVector = 0;
|
|
}
|
|
|
|
void DES::PrintBits(uint64_t v, int bits)
|
|
{
|
|
int i;
|
|
|
|
for (i = bits - 1; i >= 0; i--)
|
|
{
|
|
if ((v >> i) & 1)
|
|
printf("1");
|
|
else
|
|
printf("0");
|
|
if ((i & 7) == 0)
|
|
printf(" ");
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
uint64_t DES::Permute(const uint8_t *box, uint64_t v)
|
|
{
|
|
int i;
|
|
uint64_t r;
|
|
|
|
r = 0;
|
|
for (i = 0; i < 64; i++) {
|
|
r = (r << 1) | ((v >> (64 - box[i])) & 1);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
uint64_t DES::InitialPermutation(uint64_t v)
|
|
{
|
|
return Permute(m_ip_box, v);
|
|
}
|
|
|
|
uint64_t DES::FinalPermutation(uint64_t v)
|
|
{
|
|
return Permute(m_fp_box, v);
|
|
}
|
|
|
|
uint32_t DES::Function(uint32_t r, uint64_t ks)
|
|
{
|
|
int i;
|
|
uint64_t e;
|
|
uint32_t v;
|
|
uint32_t f;
|
|
uint8_t s[8];
|
|
|
|
e = 0;
|
|
for (i = 0; i < 48; i++)
|
|
e = (e << 1) | ((r >> (32 - m_e_box[i])) & 1);
|
|
|
|
e = e ^ ks;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
s[i] = (e >> (42 - 6 * i)) & 0x3F;
|
|
|
|
v = (m_s1[s[0]] << 28) | (m_s2[s[1]] << 24) | (m_s3[s[2]] << 20) | (m_s4[s[3]] << 16) | (m_s5[s[4]] << 12) | (m_s6[s[5]] << 8) | (m_s7[s[6]] << 4) | m_s8[s[7]];
|
|
|
|
f = 0;
|
|
for (i = 0; i < 32; i++)
|
|
f = (f << 1) | ((v >> (32 - m_p_box[i])) & 1);
|
|
|
|
return f;
|
|
}
|
|
|
|
void DES::KeySchedule(uint64_t key, uint64_t *ks)
|
|
{
|
|
uint32_t c, d;
|
|
uint64_t t;
|
|
uint64_t k;
|
|
int i;
|
|
int j;
|
|
|
|
t = 0;
|
|
|
|
for (i = 0; i < 56; i++)
|
|
t = (t << 1) | ((key >> (64 - m_pc1_box[i])) & 1);
|
|
|
|
c = (t >> 28) & 0xFFFFFFF;
|
|
d = t & 0xFFFFFFF;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
c = rol28(c, m_shifts[i]);
|
|
d = rol28(d, m_shifts[i]);
|
|
|
|
t = ((uint64_t)c << 28) | d;
|
|
|
|
k = 0;
|
|
for (j = 0; j < 48; j++)
|
|
k = (k << 1) | ((t >> (56 - m_pc2_box[j])) & 1);
|
|
|
|
ks[i] = k;
|
|
}
|
|
}
|
|
|
|
uint64_t DES::EncryptInternal(uint64_t v, const uint64_t *ks)
|
|
{
|
|
uint32_t l, r;
|
|
uint32_t t;
|
|
int i;
|
|
|
|
l = v >> 32;
|
|
r = v & 0xFFFFFFFF;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
t = r;
|
|
r = l ^ Function(r, ks[i]);
|
|
l = t;
|
|
}
|
|
|
|
return ((uint64_t)r << 32) | l;
|
|
}
|
|
|
|
uint64_t DES::DecryptInternal(uint64_t v, const uint64_t *ks)
|
|
{
|
|
uint32_t l, r;
|
|
uint32_t t;
|
|
int i;
|
|
|
|
r = v >> 32;
|
|
l = v & 0xFFFFFFFF;
|
|
|
|
for (i = 15; i >= 0; i--) {
|
|
t = l;
|
|
l = r ^ Function(l, ks[i]);
|
|
r = t;
|
|
}
|
|
|
|
return ((uint64_t)l << 32) | r;
|
|
}
|
|
|
|
uint64_t DES::BytesToU64(const uint8_t *data)
|
|
{
|
|
uint64_t d = 0;
|
|
|
|
for (int n = 0; n < 8; n++)
|
|
d = (d << 8) | data[n];
|
|
|
|
return d;
|
|
}
|
|
|
|
void DES::U64ToBytes(uint8_t *data, uint64_t val)
|
|
{
|
|
for (int n = 7; n >= 0; n--)
|
|
{
|
|
data[n] = val & 0xFF;
|
|
val >>= 8;
|
|
}
|
|
}
|
|
|
|
|
|
const uint8_t DES::m_ip_box[64] = {
|
|
58, 50, 42, 34, 26, 18, 10, 2,
|
|
60, 52, 44, 36, 28, 20, 12, 4,
|
|
62, 54, 46, 38, 30, 22, 14, 6,
|
|
64, 56, 48, 40, 32, 24, 16, 8,
|
|
57, 49, 41, 33, 25, 17, 9, 1,
|
|
59, 51, 43, 35, 27, 19, 11, 3,
|
|
61, 53, 45, 37, 29, 21, 13, 5,
|
|
63, 55, 47, 39, 31, 23, 15, 7
|
|
};
|
|
|
|
const uint8_t DES::m_fp_box[64] = {
|
|
40, 8, 48, 16, 56, 24, 64, 32,
|
|
39, 7, 47, 15, 55, 23, 63, 31,
|
|
38, 6, 46, 14, 54, 22, 62, 30,
|
|
37, 5, 45, 13, 53, 21, 61, 29,
|
|
36, 4, 44, 12, 52, 20, 60, 28,
|
|
35, 3, 43, 11, 51, 19, 59, 27,
|
|
34, 2, 42, 10, 50, 18, 58, 26,
|
|
33, 1, 41, 9, 49, 17, 57, 25
|
|
};
|
|
|
|
const uint8_t DES::m_e_box[48] = {
|
|
32, 1, 2, 3, 4, 5,
|
|
4, 5, 6, 7, 8, 9,
|
|
8, 9, 10, 11, 12, 13,
|
|
12, 13, 14, 15, 16, 17,
|
|
16, 17, 18, 19, 20, 21,
|
|
20, 21, 22, 23, 24, 25,
|
|
24, 25, 26, 27, 28, 29,
|
|
28, 29, 30, 31, 32, 1
|
|
};
|
|
|
|
const uint8_t DES::m_s1[64] = {
|
|
14, 0, 4, 15, 13, 7, 1, 4, 2, 14, 15, 2, 11, 13, 8, 1, 3, 10, 10, 6, 6, 12, 12, 11, 5, 9, 9, 5, 0, 3, 7, 8,
|
|
4, 15, 1, 12, 14, 8, 8, 2, 13, 4, 6, 9, 2, 1, 11, 7, 15, 5, 12, 11, 9, 3, 7, 14, 3, 10, 10, 0, 5, 6, 0, 13
|
|
};
|
|
const uint8_t DES::m_s2[64] = {
|
|
15, 3, 1, 13, 8, 4, 14, 7, 6, 15, 11, 2, 3, 8, 4, 14, 9, 12, 7, 0, 2, 1, 13, 10, 12, 6, 0, 9, 5, 11, 10, 5,
|
|
0, 13, 14, 8, 7, 10, 11, 1, 10, 3, 4, 15, 13, 4, 1, 2, 5, 11, 8, 6, 12, 7, 6, 12, 9, 0, 3, 5, 2, 14, 15, 9
|
|
};
|
|
const uint8_t DES::m_s3[64] = {
|
|
10, 13, 0, 7, 9, 0, 14, 9, 6, 3, 3, 4, 15, 6, 5, 10, 1, 2, 13, 8, 12, 5, 7, 14, 11, 12, 4, 11, 2, 15, 8, 1,
|
|
13, 1, 6, 10, 4, 13, 9, 0, 8, 6, 15, 9, 3, 8, 0, 7, 11, 4, 1, 15, 2, 14, 12, 3, 5, 11, 10, 5, 14, 2, 7, 12
|
|
};
|
|
const uint8_t DES::m_s4[64] = {
|
|
7, 13, 13, 8, 14, 11, 3, 5, 0, 6, 6, 15, 9, 0, 10, 3, 1, 4, 2, 7, 8, 2, 5, 12, 11, 1, 12, 10, 4, 14, 15, 9,
|
|
10, 3, 6, 15, 9, 0, 0, 6, 12, 10, 11, 1, 7, 13, 13, 8, 15, 9, 1, 4, 3, 5, 14, 11, 5, 12, 2, 7, 8, 2, 4, 14
|
|
};
|
|
const uint8_t DES::m_s5[64] = {
|
|
2, 14, 12, 11, 4, 2, 1, 12, 7, 4, 10, 7, 11, 13, 6, 1, 8, 5, 5, 0, 3, 15, 15, 10, 13, 3, 0, 9, 14, 8, 9, 6,
|
|
4, 11, 2, 8, 1, 12, 11, 7, 10, 1, 13, 14, 7, 2, 8, 13, 15, 6, 9, 15, 12, 0, 5, 9, 6, 10, 3, 4, 0, 5, 14, 3
|
|
};
|
|
const uint8_t DES::m_s6[64] = {
|
|
12, 10, 1, 15, 10, 4, 15, 2, 9, 7, 2, 12, 6, 9, 8, 5, 0, 6, 13, 1, 3, 13, 4, 14, 14, 0, 7, 11, 5, 3, 11, 8,
|
|
9, 4, 14, 3, 15, 2, 5, 12, 2, 9, 8, 5, 12, 15, 3, 10, 7, 11, 0, 14, 4, 1, 10, 7, 1, 6, 13, 0, 11, 8, 6, 13
|
|
};
|
|
const uint8_t DES::m_s7[64] = {
|
|
4, 13, 11, 0, 2, 11, 14, 7, 15, 4, 0, 9, 8, 1, 13, 10, 3, 14, 12, 3, 9, 5, 7, 12, 5, 2, 10, 15, 6, 8, 1, 6,
|
|
1, 6, 4, 11, 11, 13, 13, 8, 12, 1, 3, 4, 7, 10, 14, 7, 10, 9, 15, 5, 6, 0, 8, 15, 0, 14, 5, 2, 9, 3, 2, 12
|
|
};
|
|
const uint8_t DES::m_s8[64] = {
|
|
13, 1, 2, 15, 8, 13, 4, 8, 6, 10, 15, 3, 11, 7, 1, 4, 10, 12, 9, 5, 3, 6, 14, 11, 5, 0, 0, 14, 12, 9, 7, 2,
|
|
7, 2, 11, 1, 4, 14, 1, 7, 9, 4, 12, 10, 14, 8, 2, 13, 0, 15, 6, 12, 10, 9, 13, 0, 15, 3, 3, 5, 5, 6, 8, 11
|
|
};
|
|
|
|
const uint8_t DES::m_p_box[32] = {
|
|
16, 7, 20, 21,
|
|
29, 12, 28, 17,
|
|
1, 15, 23, 26,
|
|
5, 18, 31, 10,
|
|
2, 8, 24, 14,
|
|
32, 27, 3, 9,
|
|
19, 13, 30, 6,
|
|
22, 11, 4, 25
|
|
};
|
|
|
|
const uint8_t DES::m_pc1_box[56] = {
|
|
57, 49, 41, 33, 25, 17, 9,
|
|
1, 58, 50, 42, 34, 26, 18,
|
|
10, 2, 59, 51, 43, 35, 27,
|
|
19, 11, 3, 60, 52, 44, 36,
|
|
|
|
63, 55, 47, 39, 31, 23, 15,
|
|
7, 62, 54, 46, 38, 30, 22,
|
|
14, 6, 61, 53, 45, 37, 29,
|
|
21, 13, 5, 28, 20, 12, 4
|
|
};
|
|
|
|
const uint8_t DES::m_pc2_box[48] = {
|
|
14, 17, 11, 24, 1, 5,
|
|
3, 28, 15, 6, 21, 10,
|
|
23, 19, 12, 4, 26, 8,
|
|
16, 7, 27, 20, 13, 2,
|
|
41, 52, 31, 37, 47, 55,
|
|
30, 40, 51, 45, 33, 48,
|
|
44, 49, 39, 56, 34, 53,
|
|
46, 42, 50, 36, 29, 32
|
|
};
|
|
|
|
const unsigned int DES::m_shifts[16] = {
|
|
1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
|
|
};
|