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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| /** | ||
| ****************************************************************************** | ||
| * Xenia : Xbox 360 Emulator Research Project * | ||
| ****************************************************************************** | ||
| * Copyright 2024 Ben Vanik. All rights reserved. * | ||
| * Released under the BSD license - see LICENSE in the root for more details. * | ||
| ****************************************************************************** | ||
| */ | ||
| #include <algorithm> | ||
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| #include "xenia/kernel/util/crypto_utils.h" | ||
| #include "xenia/xbox.h" | ||
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| #include "third_party/crypto/TinySHA1.hpp" | ||
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| namespace xe { | ||
| namespace kernel { | ||
| namespace util { | ||
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| uint8_t xekey_0x19[] = {0xE1, 0xBC, 0x15, 0x9C, 0x73, 0xB1, 0xEA, 0xE9, | ||
| 0xAB, 0x31, 0x70, 0xF3, 0xAD, 0x47, 0xEB, 0xF3}; | ||
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| uint8_t xekey_0x19_devkit[] = {0xDA, 0xB6, 0x9A, 0xD9, 0x8E, 0x28, 0x76, 0x4F, | ||
| 0x97, 0x7E, 0xE2, 0x48, 0x7E, 0x4F, 0x3F, 0x68}; | ||
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| const uint8_t* GetXeKey(uint32_t idx, bool devkit) { | ||
| if (idx != 0x19) { | ||
| return nullptr; | ||
| } | ||
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| return devkit ? xekey_0x19_devkit : xekey_0x19; | ||
| } | ||
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| void HmacSha(const uint8_t* key, uint32_t key_size_in, const uint8_t* inp_1, | ||
| uint32_t inp_1_size, const uint8_t* inp_2, uint32_t inp_2_size, | ||
| const uint8_t* inp_3, uint32_t inp_3_size, uint8_t* out, | ||
| uint32_t out_size) { | ||
| uint32_t key_size = key_size_in; | ||
| sha1::SHA1 sha; | ||
| uint8_t kpad_i[0x40]; | ||
| uint8_t kpad_o[0x40]; | ||
| uint8_t tmp_key[0x40]; | ||
| std::memset(kpad_i, 0x36, 0x40); | ||
| std::memset(kpad_o, 0x5C, 0x40); | ||
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| // Setup HMAC key | ||
| // If > block size, use its hash | ||
| if (key_size > 0x40) { | ||
| sha1::SHA1 sha_key; | ||
| sha_key.processBytes(key, key_size); | ||
| sha_key.finalize((uint8_t*)tmp_key); | ||
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| key_size = 0x14u; | ||
| } else { | ||
| std::memcpy(tmp_key, key, key_size); | ||
| } | ||
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| for (uint32_t i = 0; i < key_size; i++) { | ||
| kpad_i[i] = tmp_key[i] ^ 0x36; | ||
| kpad_o[i] = tmp_key[i] ^ 0x5C; | ||
| } | ||
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| // Inner | ||
| sha.processBytes(kpad_i, 0x40); | ||
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| if (inp_1_size) { | ||
| sha.processBytes(inp_1, inp_1_size); | ||
| } | ||
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| if (inp_2_size) { | ||
| sha.processBytes(inp_2, inp_2_size); | ||
| } | ||
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| if (inp_3_size) { | ||
| sha.processBytes(inp_3, inp_3_size); | ||
| } | ||
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| uint8_t digest[0x14]; | ||
| sha.finalize(digest); | ||
| sha.reset(); | ||
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| // Outer | ||
| sha.processBytes(kpad_o, 0x40); | ||
| sha.processBytes(digest, 0x14); | ||
| sha.finalize(digest); | ||
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| std::memcpy(out, digest, std::min((uint32_t)out_size, 0x14u)); | ||
| } | ||
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| void RC4(const uint8_t* key, uint32_t key_size_in, const uint8_t* data, | ||
| uint32_t data_size, uint8_t* out, uint32_t out_size) { | ||
| uint8_t tmp_key[0x10]; | ||
| uint32_t sbox_size; | ||
| uint8_t sbox[0x100]; | ||
| uint32_t i; | ||
| uint32_t j; | ||
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| // Setup RC4 session... | ||
| std::memcpy(tmp_key, key, 0x10); | ||
| i = j = 0; | ||
| sbox_size = 0x100; | ||
| for (uint32_t x = 0; x < sbox_size; x++) { | ||
| sbox[x] = (uint8_t)x; | ||
| } | ||
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| uint32_t idx = 0; | ||
| for (uint32_t x = 0; x < sbox_size; x++) { | ||
| idx = (idx + sbox[x] + key[x % 0x10]) % sbox_size; | ||
| uint8_t temp = sbox[idx]; | ||
| sbox[idx] = sbox[x]; | ||
| sbox[x] = temp; | ||
| } | ||
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| // Crypt data | ||
| for (uint32_t idx = 0; idx < data_size; idx++) { | ||
| i = (i + 1) % sbox_size; | ||
| j = (j + sbox[i]) % sbox_size; | ||
| uint8_t temp = sbox[i]; | ||
| sbox[i] = sbox[j]; | ||
| sbox[j] = temp; | ||
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| uint8_t a = data[idx]; | ||
| uint8_t b = sbox[(sbox[i] + sbox[j]) % sbox_size]; | ||
| out[idx] = (uint8_t)(a ^ b); | ||
| } | ||
| } | ||
|
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| } // namespace util | ||
| } // namespace kernel | ||
| } // namespace xe |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| /** | ||
| ****************************************************************************** | ||
| * Xenia : Xbox 360 Emulator Research Project * | ||
| ****************************************************************************** | ||
| * Copyright 2024 Ben Vanik. All rights reserved. * | ||
| * Released under the BSD license - see LICENSE in the root for more details. * | ||
| ****************************************************************************** | ||
| */ | ||
|
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| #include "xenia/xbox.h" | ||
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| namespace xe { | ||
| namespace kernel { | ||
| namespace util { | ||
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| const uint8_t* GetXeKey(uint32_t idx, bool devkit = false); | ||
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| void HmacSha(const uint8_t* key, uint32_t key_size_in, const uint8_t* inp_1, | ||
| uint32_t inp_1_size, const uint8_t* inp_2, uint32_t inp_2_size, | ||
| const uint8_t* inp_3, uint32_t inp_3_size, uint8_t* out, | ||
| uint32_t out_size); | ||
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| void RC4(const uint8_t* key, uint32_t key_size_in, const uint8_t* data, | ||
| uint32_t data_size, uint8_t* out, uint32_t out_size); | ||
|
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| } // namespace util | ||
| } // namespace kernel | ||
| } // namespace xe |
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