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vgpu_unlock_hooks.c
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vgpu_unlock_hooks.c
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/*
* vGPU unlock hooks.
*
* This file is designed to be included into a single translation unit of the
* vGPU driver's kernel module. It hooks the nv_ioremap_* functions and memcpy
* for that translation unit and applies the vgpu_unlock patch when the magic
* and key values has been accessed by the driver.
*
* Copyright 2021 Jonathan Johansson
* This file is part of the "vgpu_unlock" project, and is distributed under the
* MIT License. See the LICENSE file for more details.
*
* Contributions from Krutav Shah and the vGPU Unlocking community included :)
*
*/
/*------------------------------------------------------------------------------
* Implementation of AES128-ECB.
*------------------------------------------------------------------------------
*/
typedef struct
{
uint8_t round_key[176];
}
vgpu_unlock_aes128_ctx;
typedef uint8_t vgpu_unlock_aes128_state[4][4];
#define Nb 4
#define Nk 4
#define Nr 10
#define getSBoxValue(num) (vgpu_unlock_aes128_sbox[(num)])
#define getSBoxInvert(num) (vgpu_unlock_aes128_rsbox[(num)])
#define Multiply(x, y) \
( ((y & 1) * x) ^ \
((y>>1 & 1) * vgpu_unlock_aes128_xtime(x)) ^ \
((y>>2 & 1) * vgpu_unlock_aes128_xtime(vgpu_unlock_aes128_xtime(x))) ^ \
((y>>3 & 1) * vgpu_unlock_aes128_xtime(vgpu_unlock_aes128_xtime(vgpu_unlock_aes128_xtime(x)))) ^ \
((y>>4 & 1) * vgpu_unlock_aes128_xtime(vgpu_unlock_aes128_xtime(vgpu_unlock_aes128_xtime(vgpu_unlock_aes128_xtime(x)))))) \
static const uint8_t vgpu_unlock_aes128_sbox[256] = {
//0 1 2 3 4 5 6 7 8 9 A B C D E F
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 };
static const uint8_t vgpu_unlock_aes128_rsbox[256] = {
0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d };
static const uint8_t vgpu_unlock_aes128_rcon[11] = {
0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 };
static void vgpu_unlock_aes128_key_expansion(uint8_t *round_key,
const uint8_t *Key)
{
unsigned i, j, k;
uint8_t tempa[4];
for (i = 0; i < Nk; ++i)
{
round_key[(i * 4) + 0] = Key[(i * 4) + 0];
round_key[(i * 4) + 1] = Key[(i * 4) + 1];
round_key[(i * 4) + 2] = Key[(i * 4) + 2];
round_key[(i * 4) + 3] = Key[(i * 4) + 3];
}
for (i = Nk; i < Nb * (Nr + 1); ++i)
{
k = (i - 1) * 4;
tempa[0] = round_key[k + 0];
tempa[1] = round_key[k + 1];
tempa[2] = round_key[k + 2];
tempa[3] = round_key[k + 3];
if (i % Nk == 0)
{
const uint8_t u8tmp = tempa[0];
tempa[0] = tempa[1];
tempa[1] = tempa[2];
tempa[2] = tempa[3];
tempa[3] = u8tmp;
tempa[0] = getSBoxValue(tempa[0]);
tempa[1] = getSBoxValue(tempa[1]);
tempa[2] = getSBoxValue(tempa[2]);
tempa[3] = getSBoxValue(tempa[3]);
tempa[0] = tempa[0] ^ vgpu_unlock_aes128_rcon[i/Nk];
}
j = i * 4; k=(i - Nk) * 4;
round_key[j + 0] = round_key[k + 0] ^ tempa[0];
round_key[j + 1] = round_key[k + 1] ^ tempa[1];
round_key[j + 2] = round_key[k + 2] ^ tempa[2];
round_key[j + 3] = round_key[k + 3] ^ tempa[3];
}
}
static void vgpu_unlock_aes128_add_round_key(uint8_t round,
vgpu_unlock_aes128_state *state,
const uint8_t *round_key)
{
uint8_t i,j;
for (i = 0; i < 4; ++i)
{
for (j = 0; j < 4; ++j)
{
(*state)[i][j] ^= round_key[(round * Nb * 4) + (i * Nb) + j];
}
}
}
static void vgpu_unlock_aes128_sub_bytes(vgpu_unlock_aes128_state *state)
{
uint8_t i, j;
for (i = 0; i < 4; ++i)
{
for (j = 0; j < 4; ++j)
{
(*state)[j][i] = getSBoxValue((*state)[j][i]);
}
}
}
static void vgpu_unlock_aes128_shift_rows(vgpu_unlock_aes128_state *state)
{
uint8_t temp;
temp = (*state)[0][1];
(*state)[0][1] = (*state)[1][1];
(*state)[1][1] = (*state)[2][1];
(*state)[2][1] = (*state)[3][1];
(*state)[3][1] = temp;
temp = (*state)[0][2];
(*state)[0][2] = (*state)[2][2];
(*state)[2][2] = temp;
temp = (*state)[1][2];
(*state)[1][2] = (*state)[3][2];
(*state)[3][2] = temp;
temp = (*state)[0][3];
(*state)[0][3] = (*state)[3][3];
(*state)[3][3] = (*state)[2][3];
(*state)[2][3] = (*state)[1][3];
(*state)[1][3] = temp;
}
static uint8_t vgpu_unlock_aes128_xtime(uint8_t x)
{
return ((x<<1) ^ (((x>>7) & 1) * 0x1b));
}
static void vgpu_unlock_aes128_mix_columns(vgpu_unlock_aes128_state *state)
{
uint8_t i;
uint8_t tmp, tm, t;
for (i = 0; i < 4; ++i)
{
t = (*state)[i][0];
tmp = (*state)[i][0] ^ (*state)[i][1] ^ (*state)[i][2] ^ (*state)[i][3];
tm = (*state)[i][0] ^ (*state)[i][1];
tm = vgpu_unlock_aes128_xtime(tm); (*state)[i][0] ^= tm ^ tmp;
tm = (*state)[i][1] ^ (*state)[i][2];
tm = vgpu_unlock_aes128_xtime(tm); (*state)[i][1] ^= tm ^ tmp;
tm = (*state)[i][2] ^ (*state)[i][3];
tm = vgpu_unlock_aes128_xtime(tm); (*state)[i][2] ^= tm ^ tmp;
tm = (*state)[i][3] ^ t;
tm = vgpu_unlock_aes128_xtime(tm); (*state)[i][3] ^= tm ^ tmp;
}
}
static void vgpu_unlock_aes128_inv_mix_columns(vgpu_unlock_aes128_state *state)
{
int i;
uint8_t a, b, c, d;
for (i = 0; i < 4; ++i)
{
a = (*state)[i][0];
b = (*state)[i][1];
c = (*state)[i][2];
d = (*state)[i][3];
(*state)[i][0] = Multiply(a, 0x0e) ^ Multiply(b, 0x0b) ^ Multiply(c, 0x0d) ^ Multiply(d, 0x09);
(*state)[i][1] = Multiply(a, 0x09) ^ Multiply(b, 0x0e) ^ Multiply(c, 0x0b) ^ Multiply(d, 0x0d);
(*state)[i][2] = Multiply(a, 0x0d) ^ Multiply(b, 0x09) ^ Multiply(c, 0x0e) ^ Multiply(d, 0x0b);
(*state)[i][3] = Multiply(a, 0x0b) ^ Multiply(b, 0x0d) ^ Multiply(c, 0x09) ^ Multiply(d, 0x0e);
}
}
static void vgpu_unlock_aes128_inv_sub_bytes(vgpu_unlock_aes128_state *state)
{
uint8_t i, j;
for (i = 0; i < 4; ++i)
{
for (j = 0; j < 4; ++j)
{
(*state)[j][i] = getSBoxInvert((*state)[j][i]);
}
}
}
static void vgpu_unlock_aes128_inv_shift_rows(vgpu_unlock_aes128_state *state)
{
uint8_t temp;
temp = (*state)[3][1];
(*state)[3][1] = (*state)[2][1];
(*state)[2][1] = (*state)[1][1];
(*state)[1][1] = (*state)[0][1];
(*state)[0][1] = temp;
temp = (*state)[0][2];
(*state)[0][2] = (*state)[2][2];
(*state)[2][2] = temp;
temp = (*state)[1][2];
(*state)[1][2] = (*state)[3][2];
(*state)[3][2] = temp;
temp = (*state)[0][3];
(*state)[0][3] = (*state)[1][3];
(*state)[1][3] = (*state)[2][3];
(*state)[2][3] = (*state)[3][3];
(*state)[3][3] = temp;
}
static void vgpu_unlock_aes128_cipher(vgpu_unlock_aes128_state *state,
const uint8_t* round_key)
{
uint8_t round = 0;
vgpu_unlock_aes128_add_round_key(0, state, round_key);
for (round = 1; ; ++round)
{
vgpu_unlock_aes128_sub_bytes(state);
vgpu_unlock_aes128_shift_rows(state);
if (round == Nr)
{
break;
}
vgpu_unlock_aes128_mix_columns(state);
vgpu_unlock_aes128_add_round_key(round, state, round_key);
}
vgpu_unlock_aes128_add_round_key(Nr, state, round_key);
}
static void vgpu_unlock_aes128_inv_cipher(vgpu_unlock_aes128_state *state,
const uint8_t* round_key)
{
uint8_t round = 0;
vgpu_unlock_aes128_add_round_key(Nr, state, round_key);
for (round = (Nr - 1); ; --round)
{
vgpu_unlock_aes128_inv_shift_rows(state);
vgpu_unlock_aes128_inv_sub_bytes(state);
vgpu_unlock_aes128_add_round_key(round, state, round_key);
if (round == 0)
{
break;
}
vgpu_unlock_aes128_inv_mix_columns(state);
}
}
static void vgpu_unlock_aes128_init(vgpu_unlock_aes128_ctx *ctx,
const uint8_t *key)
{
vgpu_unlock_aes128_key_expansion(ctx->round_key, key);
}
static void vgpu_unlock_aes128_encrypt(const vgpu_unlock_aes128_ctx *ctx,
uint8_t *buf)
{
vgpu_unlock_aes128_cipher((vgpu_unlock_aes128_state*)buf,
ctx->round_key);
}
static void vgpu_unlock_aes128_decrypt(const vgpu_unlock_aes128_ctx *ctx,
uint8_t* buf)
{
vgpu_unlock_aes128_inv_cipher((vgpu_unlock_aes128_state*)buf,
ctx->round_key);
}
#undef Nb
#undef Nk
#undef Nr
#undef getSBoxValue
#undef getSBoxInvert
#undef Multiply
/*------------------------------------------------------------------------------
* End of AES128-ECB implementation.
*------------------------------------------------------------------------------
*/
/*------------------------------------------------------------------------------
* Implementation of SHA256.
* Original author: Brad Conte (brad AT bradconte.com)
*------------------------------------------------------------------------------
*/
typedef struct {
uint8_t data[64];
uint32_t datalen;
uint64_t bitlen;
uint32_t state[8];
}
vgpu_unlock_sha256_ctx;
#define ROTLEFT(a,b) (((a) << (b)) | ((a) >> (32-(b))))
#define ROTRIGHT(a,b) (((a) >> (b)) | ((a) << (32-(b))))
#define CH(x,y,z) (((x) & (y)) ^ (~(x) & (z)))
#define MAJ(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
#define EP0(x) (ROTRIGHT(x,2) ^ ROTRIGHT(x,13) ^ ROTRIGHT(x,22))
#define EP1(x) (ROTRIGHT(x,6) ^ ROTRIGHT(x,11) ^ ROTRIGHT(x,25))
#define SIG0(x) (ROTRIGHT(x,7) ^ ROTRIGHT(x,18) ^ ((x) >> 3))
#define SIG1(x) (ROTRIGHT(x,17) ^ ROTRIGHT(x,19) ^ ((x) >> 10))
static void vgpu_unlock_sha256_transform(vgpu_unlock_sha256_ctx *ctx,
const uint8_t data[])
{
static const uint32_t k[64] = {
0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
};
uint32_t a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
for (i = 0, j = 0; i < 16; ++i, j += 4)
m[i] = (data[j] << 24) | (data[j + 1] << 16) | (data[j + 2] << 8) | (data[j + 3]);
for ( ; i < 64; ++i)
m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
a = ctx->state[0];
b = ctx->state[1];
c = ctx->state[2];
d = ctx->state[3];
e = ctx->state[4];
f = ctx->state[5];
g = ctx->state[6];
h = ctx->state[7];
for (i = 0; i < 64; ++i) {
t1 = h + EP1(e) + CH(e,f,g) + k[i] + m[i];
t2 = EP0(a) + MAJ(a,b,c);
h = g;
g = f;
f = e;
e = d + t1;
d = c;
c = b;
b = a;
a = t1 + t2;
}
ctx->state[0] += a;
ctx->state[1] += b;
ctx->state[2] += c;
ctx->state[3] += d;
ctx->state[4] += e;
ctx->state[5] += f;
ctx->state[6] += g;
ctx->state[7] += h;
}
static void vgpu_unlock_sha256_init(vgpu_unlock_sha256_ctx *ctx)
{
ctx->datalen = 0;
ctx->bitlen = 0;
ctx->state[0] = 0x6a09e667;
ctx->state[1] = 0xbb67ae85;
ctx->state[2] = 0x3c6ef372;
ctx->state[3] = 0xa54ff53a;
ctx->state[4] = 0x510e527f;
ctx->state[5] = 0x9b05688c;
ctx->state[6] = 0x1f83d9ab;
ctx->state[7] = 0x5be0cd19;
}
static void vgpu_unlock_sha256_update(vgpu_unlock_sha256_ctx *ctx,
const uint8_t data[],
size_t len)
{
uint32_t i;
for (i = 0; i < len; ++i) {
ctx->data[ctx->datalen] = data[i];
ctx->datalen++;
if (ctx->datalen == 64) {
vgpu_unlock_sha256_transform(ctx, ctx->data);
ctx->bitlen += 512;
ctx->datalen = 0;
}
}
}
static void vgpu_unlock_sha256_final(vgpu_unlock_sha256_ctx *ctx,
uint8_t hash[])
{
uint32_t i;
i = ctx->datalen;
/* Pad whatever data is left in the buffer. */
if (ctx->datalen < 56) {
ctx->data[i++] = 0x80;
while (i < 56)
ctx->data[i++] = 0x00;
}
else {
ctx->data[i++] = 0x80;
while (i < 64)
ctx->data[i++] = 0x00;
vgpu_unlock_sha256_transform(ctx, ctx->data);
memset(ctx->data, 0, 56);
}
/*
* Append to the padding the total message's length in bits and
* transform.
*/
ctx->bitlen += ctx->datalen * 8;
ctx->data[63] = ctx->bitlen;
ctx->data[62] = ctx->bitlen >> 8;
ctx->data[61] = ctx->bitlen >> 16;
ctx->data[60] = ctx->bitlen >> 24;
ctx->data[59] = ctx->bitlen >> 32;
ctx->data[58] = ctx->bitlen >> 40;
ctx->data[57] = ctx->bitlen >> 48;
ctx->data[56] = ctx->bitlen >> 56;
vgpu_unlock_sha256_transform(ctx, ctx->data);
/*
* Since this implementation uses little endian byte ordering and SHA
* uses big endian, reverse all the bytes when copying the final state
* to the output hash.
*/
for (i = 0; i < 4; ++i) {
hash[i] = (ctx->state[0] >> (24 - i * 8)) & 0x000000ff;
hash[i + 4] = (ctx->state[1] >> (24 - i * 8)) & 0x000000ff;
hash[i + 8] = (ctx->state[2] >> (24 - i * 8)) & 0x000000ff;
hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0x000000ff;
hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0x000000ff;
hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0x000000ff;
hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0x000000ff;
hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0x000000ff;
}
}
#undef ROTLEFT
#undef ROTRIGHT
#undef CH
#undef MAJ
#undef EP0
#undef EP1
#undef SIG0
#undef SIG1
/*------------------------------------------------------------------------------
* End of SHA256 implementation.
*------------------------------------------------------------------------------
*/
/*------------------------------------------------------------------------------
* Implementation of HMAC-SHA256.
*------------------------------------------------------------------------------
*/
static void vgpu_unlock_hmac_sha256(void* dst,
const void *msg,
size_t msg_size,
const void *key,
size_t key_size)
{
vgpu_unlock_sha256_ctx ctx;
uint8_t o_key[96];
uint8_t i_key_pad[64];
uint8_t i;
for (i = 0; i < 64; i++)
{
if (i < key_size)
{
o_key[i] = ((uint8_t*)key)[i] ^ 0x5c;
i_key_pad[i] = ((uint8_t*)key)[i] ^ 0x36;
}
else
{
o_key[i] = 0x5c;
i_key_pad[i] = 0x36;
}
}
vgpu_unlock_sha256_init(&ctx);
vgpu_unlock_sha256_update(&ctx, i_key_pad, sizeof(i_key_pad));
vgpu_unlock_sha256_update(&ctx, msg, msg_size);
vgpu_unlock_sha256_final(&ctx, &o_key[64]);
vgpu_unlock_sha256_init(&ctx);
vgpu_unlock_sha256_update(&ctx, o_key, sizeof(o_key));
vgpu_unlock_sha256_final(&ctx, dst);
}
/*------------------------------------------------------------------------------
* End of HMAC-SHA256 implementation.
*------------------------------------------------------------------------------
*/
/*------------------------------------------------------------------------------
* Implementation of vgpu_unlock hooks.
*------------------------------------------------------------------------------
*/
/* Debug logs can be enabled here. To enable it, change 0 to 1. */
#if 0
#define LOG(...) printk(__VA_ARGS__)
#else
#define LOG(...)
#endif
typedef struct {
uint8_t num_blocks; /* Number of 16 byte blocks up to 'sign'. */
uint8_t name1_len; /* Length of first name (unused?) */
uint8_t name2_len; /* Length of second name (used by VM) */
uint16_t dev_id;
uint16_t vend_id; /* Check skipped if zero. */
uint16_t subsys_id;
uint16_t subsys_vend_id; /* Check skipped if zero. */
char name1_2[38]; /* First and second name, no separation. */
uint8_t sign[0x20];
}
__attribute__((packed))
vgpu_unlock_vgpu_t;
/* Helper macro to initialize the structure above. */
#define VGPU(dev_id, subsys_id, name) \
{ (10 + 2 * strlen(name) + 15) / 16, /* num_blocks */ \
strlen(name), /* name1_len */ \
strlen(name), /* name2_len */ \
(dev_id), /* dev_id */ \
0, /* vend_id */ \
(subsys_id), /* subsys_id */ \
0, /* subsys_vend_id */ \
{ name name } } /* name1_2 */
static vgpu_unlock_vgpu_t vgpu_unlock_vgpu[] =
{
/* Tesla M10 (Maxwell) */
VGPU(0x13bd, 0x11cc, "GRID M10-0B"),
VGPU(0x13bd, 0x11cd, "GRID M10-1B"),
VGPU(0x13bd, 0x1339, "GRID M10-1B4"),
VGPU(0x13bd, 0x1286, "GRID M10-2B"),
VGPU(0x13bd, 0x12ee, "GRID M10-2B4"),
VGPU(0x13bd, 0x11ce, "GRID M10-0Q"),
VGPU(0x13bd, 0x11cf, "GRID M10-1Q"),
VGPU(0x13bd, 0x11d0, "GRID M10-2Q"),
VGPU(0x13bd, 0x11d1, "GRID M10-4Q"),
VGPU(0x13bd, 0x11d2, "GRID M10-8Q"),
VGPU(0x13bd, 0x11d3, "GRID M10-1A"),
VGPU(0x13bd, 0x11d4, "GRID M10-2A"),
VGPU(0x13bd, 0x11d5, "GRID M10-4A"),
VGPU(0x13bd, 0x11d6, "GRID M10-8A"),
/* Tesla M60 (Maxwell 2.0) */
VGPU(0x13f2, 0x114c, "GRID M60-0Q"),
VGPU(0x13f2, 0x114d, "GRID M60-1Q"),
VGPU(0x13f2, 0x114e, "GRID M60-2Q"),
VGPU(0x13f2, 0x114f, "GRID M60-4Q"),
VGPU(0x13f2, 0x1150, "GRID M60-8Q"),
VGPU(0x13f2, 0x1176, "GRID M60-0B"),
VGPU(0x13f2, 0x1177, "GRID M60-1B"),
VGPU(0x13f2, 0x117D, "GRID M60-2B"),
VGPU(0x13f2, 0x1337, "GRID M60-1B4"),
VGPU(0x13f2, 0x12ec, "GRID M60-2B4"),
VGPU(0x13f2, 0x11ae, "GRID M60-1A"),
VGPU(0x13f2, 0x11aF, "GRID M60-2A"),
VGPU(0x13f2, 0x11b0, "GRID M60-4A"),
VGPU(0x13f2, 0x11b1, "GRID M60-8A"),
/* Tesla P4 (Pascal) */
VGPU(0x1bb3, 0x1203, "GRID P4-1B"),
VGPU(0x1bb3, 0x1204, "GRID P4-1Q"),
VGPU(0x1bb3, 0x1205, "GRID P4-2Q"),
VGPU(0x1bb3, 0x1206, "GRID P4-4Q"),
VGPU(0x1bb3, 0x1207, "GRID P4-8Q"),
VGPU(0x1bb3, 0x1208, "GRID P4-1A"),
VGPU(0x1bb3, 0x1209, "GRID P4-2A"),
VGPU(0x1bb3, 0x120a, "GRID P4-4A"),
VGPU(0x1bb3, 0x120b, "GRID P4-8A"),
VGPU(0x1bb3, 0x1288, "GRID P4-2B"),
VGPU(0x1bb3, 0x12f1, "GRID P4-2B4"),
VGPU(0x1bb3, 0x133c, "GRID P4-1B4"),
VGPU(0x1bb3, 0x1380, "GRID P4-8C"),
VGPU(0x1bb3, 0x1385, "GRID P4-4C"),
/* Tesla P40 (Pascal) */
VGPU(0x1b38, 0x11e7, "GRID P40-1B"),
VGPU(0x1b38, 0x11e8, "GRID P40-1Q"),
VGPU(0x1b38, 0x11e9, "GRID P40-2Q"),
VGPU(0x1b38, 0x11ea, "GRID P40-3Q"),
VGPU(0x1b38, 0x11eb, "GRID P40-4Q"),
VGPU(0x1b38, 0x11ec, "GRID P40-6Q"),
VGPU(0x1b38, 0x11ed, "GRID P40-8Q"),
VGPU(0x1b38, 0x11ee, "GRID P40-12Q"),
VGPU(0x1b38, 0x11ef, "GRID P40-24Q"),
VGPU(0x1b38, 0x11f0, "GRID P40-1A"),
VGPU(0x1b38, 0x11f1, "GRID P40-2A"),
VGPU(0x1b38, 0x11f2, "GRID P40-3A"),
VGPU(0x1b38, 0x11f3, "GRID P40-4A"),
VGPU(0x1b38, 0x11f4, "GRID P40-6A"),
VGPU(0x1b38, 0x11f5, "GRID P40-8A"),
VGPU(0x1b38, 0x11f6, "GRID P40-12A"),
VGPU(0x1b38, 0x11f7, "GRID P40-24A"),
VGPU(0x1b38, 0x1287, "GRID P40-2B"),
VGPU(0x1b38, 0x12ef, "GRID P40-2B4"),
VGPU(0x1b38, 0x133a, "GRID P40-1B4"),
VGPU(0x1b38, 0x137e, "GRID P40-24C"),
VGPU(0x1b38, 0x1381, "GRID P40-4C"),
VGPU(0x1b38, 0x1382, "GRID P40-6C"),
VGPU(0x1b38, 0x1383, "GRID P40-8C"),
VGPU(0x1b38, 0x1384, "GRID P40-12C"),
/* Tesla V100 32GB PCIE (Volta) */
VGPU(0x1db6, 0x12bd, "GRID V100D-1B"),
VGPU(0x1db6, 0x12be, "GRID V100D-2B"),
VGPU(0x1db6, 0x12f7, "GRID V100D-2B4"),
VGPU(0x1db6, 0x1342, "GRID V100D-1B4"),
VGPU(0x1db6, 0x12bf, "GRID V100D-1Q"),
VGPU(0x1db6, 0x12c0, "GRID V100D-2Q"),
VGPU(0x1db6, 0x12c1, "GRID V100D-4Q"),
VGPU(0x1db6, 0x12c2, "GRID V100D-8Q"),
VGPU(0x1db6, 0x12c3, "GRID V100D-16Q"),
VGPU(0x1db6, 0x12c4, "GRID V100D-32Q"),
VGPU(0x1db6, 0x12c5, "GRID V100D-1A"),
VGPU(0x1db6, 0x12c6, "GRID V100D-2A"),
VGPU(0x1db6, 0x12c7, "GRID V100D-4A"),
VGPU(0x1db6, 0x12c8, "GRID V100D-8A"),
VGPU(0x1db6, 0x12c9, "GRID V100D-16A"),
VGPU(0x1db6, 0x12ca, "GRID V100D-32A"),
VGPU(0x1db6, 0x1395, "GRID V100D-4C"),
VGPU(0x1db6, 0x1396, "GRID V100D-8C"),
VGPU(0x1db6, 0x1397, "GRID V100D-16C"),
VGPU(0x1db6, 0x1377, "GRID V100D-32C"),
/* Tesla T4 (Turing) */
VGPU(0x1eb8, 0x1309, "GRID T4-1B"),
VGPU(0x1eb8, 0x130a, "GRID T4-2B"),
VGPU(0x1eb8, 0x130b, "GRID T4-2B4"),
VGPU(0x1eb8, 0x130c, "GRID T4-1Q"),
VGPU(0x1eb8, 0x130d, "GRID T4-2Q"),
VGPU(0x1eb8, 0x130e, "GRID T4-4Q"),
VGPU(0x1eb8, 0x130f, "GRID T4-8Q"),
VGPU(0x1eb8, 0x1310, "GRID T4-16Q"),
VGPU(0x1eb8, 0x1311, "GRID T4-1A"),
VGPU(0x1eb8, 0x1312, "GRID T4-2A"),
VGPU(0x1eb8, 0x1313, "GRID T4-4A"),
VGPU(0x1eb8, 0x1314, "GRID T4-8A"),
VGPU(0x1eb8, 0x1315, "GRID T4-16A"),
VGPU(0x1eb8, 0x1345, "GRID T4-1B4"),
VGPU(0x1eb8, 0x1375, "GRID T4-16C"),
VGPU(0x1eb8, 0x139a, "GRID T4-4C"),
VGPU(0x1eb8, 0x139b, "GRID T4-8C"),
/* Quadro RTX 6000 (Turing) */
VGPU(0x1e30, 0x1325, "GRID RTX6000-1Q"),
VGPU(0x1e30, 0x1326, "GRID RTX6000-2Q"),
VGPU(0x1e30, 0x1327, "GRID RTX6000-3Q"),
VGPU(0x1e30, 0x1328, "GRID RTX6000-4Q"),
VGPU(0x1e30, 0x1329, "GRID RTX6000-6Q"),
VGPU(0x1e30, 0x132a, "GRID RTX6000-8Q"),
VGPU(0x1e30, 0x132b, "GRID RTX6000-12Q"),
VGPU(0x1e30, 0x132c, "GRID RTX6000-24Q"),
VGPU(0x1e30, 0x13bf, "GRID RTX6000-4C"),
VGPU(0x1e30, 0x13c0, "GRID RTX6000-6C"),
VGPU(0x1e30, 0x13c1, "GRID RTX6000-8C"),
VGPU(0x1e30, 0x13c2, "GRID RTX6000-12C"),
VGPU(0x1e30, 0x13c3, "GRID RTX6000-24C"),
VGPU(0x1e30, 0x1437, "GRID RTX6000-1B"),
VGPU(0x1e30, 0x1438, "GRID RTX6000-2B"),
VGPU(0x1e30, 0x1439, "GRID RTX6000-1A"),
VGPU(0x1e30, 0x143a, "GRID RTX6000-2A"),
VGPU(0x1e30, 0x143b, "GRID RTX6000-3A"),
VGPU(0x1e30, 0x143c, "GRID RTX6000-4A"),
VGPU(0x1e30, 0x143d, "GRID RTX6000-6A"),
VGPU(0x1e30, 0x143e, "GRID RTX6000-8A"),
VGPU(0x1e30, 0x143f, "GRID RTX6000-12A"),
VGPU(0x1e30, 0x1440, "GRID RTX6000-24A"),
/* RTX A6000 (Ampere) */
VGPU(0x2230, 0x14fa, "NVIDIA RTXA6000-1B"),
VGPU(0x2230, 0x14fb, "NVIDIA RTXA6000-2B"),
VGPU(0x2230, 0x14fc, "NVIDIA RTXA6000-1Q"),
VGPU(0x2230, 0x14fd, "NVIDIA RTXA6000-2Q"),
VGPU(0x2230, 0x14fe, "NVIDIA RTXA6000-3Q"),
VGPU(0x2230, 0x14ff, "NVIDIA RTXA6000-4Q"),
VGPU(0x2230, 0x1500, "NVIDIA RTXA6000-6Q"),
VGPU(0x2230, 0x1501, "NVIDIA RTXA6000-8Q"),
VGPU(0x2230, 0x1502, "NVIDIA RTXA6000-12Q"),
VGPU(0x2230, 0x1503, "NVIDIA RTXA6000-16Q"),
VGPU(0x2230, 0x1504, "NVIDIA RTXA6000-24Q"),
VGPU(0x2230, 0x1505, "NVIDIA RTXA6000-48Q"),
VGPU(0x2230, 0x1506, "NVIDIA RTXA6000-1A"),
VGPU(0x2230, 0x1507, "NVIDIA RTXA6000-2A"),
VGPU(0x2230, 0x1508, "NVIDIA RTXA6000-3A"),
VGPU(0x2230, 0x1509, "NVIDIA RTXA6000-4A"),
VGPU(0x2230, 0x150a, "NVIDIA RTXA6000-6A"),
VGPU(0x2230, 0x150b, "NVIDIA RTXA6000-8A"),
VGPU(0x2230, 0x150c, "NVIDIA RTXA6000-12A"),
VGPU(0x2230, 0x150d, "NVIDIA RTXA6000-16A"),
VGPU(0x2230, 0x150e, "NVIDIA RTXA6000-24A"),
VGPU(0x2230, 0x150f, "NVIDIA RTXA6000-48A"),
VGPU(0x2230, 0x1514, "NVIDIA RTXA6000-4C"),
VGPU(0x2230, 0x1515, "NVIDIA RTXA6000-6C"),
VGPU(0x2230, 0x1516, "NVIDIA RTXA6000-8C"),
VGPU(0x2230, 0x1517, "NVIDIA RTXA6000-12C"),
VGPU(0x2230, 0x1518, "NVIDIA RTXA6000-16C"),
VGPU(0x2230, 0x1519, "NVIDIA RTXA6000-24C"),
VGPU(0x2230, 0x151a, "NVIDIA RTXA6000-48C"),
{ 0 } /* Sentinel */
};
#undef VGPU
static const uint8_t vgpu_unlock_magic_start[0x10] = {
0xf3, 0xf5, 0x9e, 0x3d, 0x13, 0x91, 0x75, 0x18,
0x6a, 0x7b, 0x55, 0xed, 0xce, 0x5d, 0x84, 0x67
};
static const uint8_t vgpu_unlock_magic_sacrifice[0x10] = {
0x46, 0x4f, 0x39, 0x49, 0x74, 0x91, 0xd7, 0x0f,
0xbc, 0x65, 0xc2, 0x70, 0xdd, 0xdd, 0x11, 0x54
};
static bool vgpu_unlock_patch_applied = FALSE;
static bool vgpu_unlock_bar3_mapped = FALSE;
static uint64_t vgpu_unlock_bar3_beg;
static uint64_t vgpu_unlock_bar3_end;
static uint8_t vgpu_unlock_magic[0x10];
static bool vgpu_unlock_magic_found = FALSE;
static uint8_t vgpu_unlock_key[0x10];
static bool vgpu_unlock_key_found = FALSE;
/* These need to be added to the linker script. */
extern uint8_t vgpu_unlock_nv_kern_rodata_beg;
extern uint8_t vgpu_unlock_nv_kern_rodata_end;
static uint16_t vgpu_unlock_pci_devid_to_vgpu_capable(uint16_t pci_devid)
{
switch (pci_devid)
{
/* Maxwell */
case 0x1340 ... 0x13bd:
case 0x174d ... 0x179c:
return 0x13bd; /* Tesla M10 */
/* Maxwell 2.0 */
case 0x13c0 ... 0x1436:
case 0x1617 ... 0x1667: /* GM204 */
case 0x17c2 ... 0x17fd: /* GM200 */
return 0x13f2; /* Tesla M60 */
/* Pascal */
case 0x15f0 ... 0x15f1: /* GP100GL */
case 0x1b00 ... 0x1d56:
case 0x1725 ... 0x172f: /* GP100 */
return 0x1b38; /* Tesla P40 */
/* Volta GV100 */
case 0x1d81: /* Titan V 16GB */
case 0x1dba: /* Quadro GV100 32GB */
return 0x1db6; /* Tesla V100 32GB PCIE */
/* Turing */
case 0x1e02 ... 0x1ff9:
case 0x2182 ... 0x21d1: /* TU116 */
return 0x1e30; /* Quadro RTX 6000 */
/* Ampere */
case 0x2200 ... 0x2600:
return 0x2230; /* RTX A6000 */
}
return pci_devid;
}
/* Our own memcmp that will bypass buffer overflow checks. */
static int vgpu_unlock_memcmp(const void *a, const void *b, size_t size)
{
uint8_t *pa = (uint8_t*)a;
uint8_t *pb = (uint8_t*)b;
while (size--)
{
if (*pa != *pb)
{
return *pa - *pb;
}
pa++;
pb++;
}
return 0;
}
/* Search for a certain pattern in the .rodata section of nv-kern.o_binary. */
static void *vgpu_unlock_find_in_rodata(const void *val, size_t size)
{
uint8_t *i;
for (i = &vgpu_unlock_nv_kern_rodata_beg;
i < &vgpu_unlock_nv_kern_rodata_end - size;
i++)
{
if (vgpu_unlock_memcmp(val, i, size) == 0)
{
return i;
}
}
return NULL;
}
/* Check if a value is within a range. */
static bool vgpu_unlock_in_range(uint64_t val, uint64_t beg, uint64_t end)
{
return (val >= beg) && (val <= end);
}
/* Check if range a is completely contained within range b. */
static bool vgpu_unlock_range_contained_in(uint64_t a_beg,
uint64_t a_end,
uint64_t b_beg,
uint64_t b_end)
{
return vgpu_unlock_in_range(a_beg, b_beg, b_end) &&
vgpu_unlock_in_range(a_end, b_beg, b_end);
}
/* Check if an address points into a specific BAR of an NVIDIA GPU. */
static bool vgpu_unlock_in_bar(uint64_t addr, int bar)
{
struct pci_dev *dev = NULL;
while (1)
{
dev = pci_get_device(0x10de, PCI_ANY_ID, dev);
if (dev)
{
if (vgpu_unlock_in_range(addr,
pci_resource_start(dev, bar),
pci_resource_end(dev, bar)))
{
return TRUE;
}
}
else
{
return FALSE;
}
}
}
/* Check if a potential magic value is valid. */
static bool vgpu_unlock_magic_valid(const uint8_t *magic)
{
void **gpu_list_item;
static void **gpu_list_start = NULL;
if (!gpu_list_start)
{
void *magic_start = vgpu_unlock_find_in_rodata(vgpu_unlock_magic_start,
sizeof(vgpu_unlock_magic_start));
if (!magic_start)
{
LOG(KERN_ERR "Failed to find start of gpu list in .rodata\n");
return NULL;
}
gpu_list_start = (void**)vgpu_unlock_find_in_rodata(&magic_start,
sizeof(magic_start));
if (!gpu_list_start)
{
LOG(KERN_ERR "Failed to find pointer to start of gpu list in .rodata\n");
return NULL;
}
}
for (gpu_list_item = gpu_list_start;
vgpu_unlock_in_range((uint64_t)*gpu_list_item,
(uint64_t)&vgpu_unlock_nv_kern_rodata_beg,
(uint64_t)&vgpu_unlock_nv_kern_rodata_end);
gpu_list_item += 3)
{
if (memcmp(magic, *gpu_list_item, 0x10) == 0)
{
return TRUE;
}
}
return FALSE;
}
static void vgpu_unlock_apply_patch(void)
{
uint8_t i;
void *magic;
void **magic_ptr;
void **blocks_ptr;
void **sign_ptr;
uint8_t sign[0x20];
uint8_t num_blocks;
void *sac_magic;
void **sac_magic_ptr;
void **sac_blocks_ptr;
void **sac_sign_ptr;
vgpu_unlock_aes128_ctx aes_ctx;
vgpu_unlock_vgpu_t* vgpu;
uint8_t first_block[0x10];
uint16_t device_id;
magic = vgpu_unlock_find_in_rodata(vgpu_unlock_magic,
sizeof(vgpu_unlock_magic));
if (!magic)
{
LOG(KERN_ERR "Failed to find magic in .rodata.\n");
goto failed;
}
LOG(KERN_WARNING "Magic is at: %px\n", magic);
magic_ptr = (void**)vgpu_unlock_find_in_rodata(&magic,
sizeof(magic));
if (!magic_ptr)
{
LOG(KERN_ERR "Failed to find pointer to magic in .rodata.\n");
goto failed;
}