#include "keydb.h" #include "aes.h" #include "sha.h" #include "ff.h" typedef struct { u8 slot; // keyslot, 0x00...0x39 char type; // type 'X' / 'Y' / 'N' for normalKey char id[10]; // key ID for special keys, all zero for standard keys } __attribute__((packed)) AesKeyDesc; typedef struct { AesKeyDesc desc; // slot, type, id u8 isDevkitKey; // 1 if for DevKit unit, 0 otherwise u8 keySha256[32]; // SHA-256 of the key } __attribute__((packed)) AesKeyHashInfo; typedef struct { u8 slot; // keyslot, 0x00...0x39 u8 isDevkitKey; // 1 if for DevKit unit, 0 otherwise u8 sample[16]; // sample data, encoded with src = keyY = ctr = { 0 } } __attribute__((packed)) AesNcchSampleInfo; static u64 keyState = 0; static u64 keyXState = 0; static u64 keyYState = 0; u32 GetUnitKeysType(void) { static u32 keys_type = KEYS_UNKNOWN; if (keys_type == KEYS_UNKNOWN) { static const u8 slot0x2CSampleRetail[16] = { 0xBC, 0xC4, 0x16, 0x2C, 0x2A, 0x06, 0x91, 0xEE, 0x47, 0x18, 0x86, 0xB8, 0xEB, 0x2F, 0xB5, 0x48 }; static const u8 slot0x2CSampleDevkit[16] = { 0x29, 0xB5, 0x5D, 0x9F, 0x61, 0xAC, 0xD2, 0x28, 0x22, 0x23, 0xFB, 0x57, 0xDD, 0x50, 0x8A, 0xF5 }; static u8 zeroes[16] = { 0 }; u8 sample[16] = { 0 }; setup_aeskeyY(0x2C, zeroes); use_aeskey(0x2C); set_ctr(zeroes); aes_decrypt(sample, sample, 1, AES_CNT_CTRNAND_MODE); if (memcmp(sample, slot0x2CSampleRetail, 16) == 0) { keys_type = KEYS_RETAIL; } else if (memcmp(sample, slot0x2CSampleDevkit, 16) == 0) { keys_type = KEYS_DEVKIT; } } return keys_type; } void CryptAesKeyInfo(AesKeyInfo* info) { static u8 zeroes[16] = { 0 }; u8 ctr[16] = { 0 }; memcpy(ctr, (void*) info, 12); // CTR -> slot + type + id + zeroes setup_aeskeyY(0x2C, zeroes); use_aeskey(0x2C); set_ctr(ctr); aes_decrypt(info->key, info->key, 1, AES_CNT_CTRNAND_MODE); info->isEncrypted = !info->isEncrypted; } u32 CheckAesKeyInfo(u8* key, u32 keyslot, char type, char* id) { static const AesKeyHashInfo keyHashes[] = { { { 0x05, 'Y', "" }, 0, // Retail N3DS CTRNAND key SHA256 { 0x98, 0x24, 0x27, 0x14, 0x22, 0xB0, 0x6B, 0xF2, 0x10, 0x96, 0x9C, 0x36, 0x42, 0x53, 0x7C, 0x86, 0x62, 0x22, 0x5C, 0xFD, 0x6F, 0xAE, 0x9B, 0x0A, 0x85, 0xA5, 0xCE, 0x21, 0xAA, 0xB6, 0xC8, 0x4D } }, { { 0x18, 'X', "" }, 0, // Retail NCCH Secure3 key SHA256 { 0x76, 0xC7, 0x6B, 0x65, 0x5D, 0xB8, 0x52, 0x19, 0xC5, 0xD3, 0x5D, 0x51, 0x7F, 0xFA, 0xF7, 0xA4, 0x3E, 0xBA, 0xD6, 0x6E, 0x31, 0xFB, 0xDD, 0x57, 0x43, 0x92, 0x59, 0x37, 0xA8, 0x93, 0xCC, 0xFC } }, { { 0x1B, 'X', "" }, 0, // Retail NCCH Secure4 key SHA256 { 0x9A, 0x20, 0x1E, 0x7C, 0x37, 0x37, 0xF3, 0x72, 0x2E, 0x5B, 0x57, 0x8D, 0x11, 0x83, 0x7F, 0x19, 0x7C, 0xA6, 0x5B, 0xF5, 0x26, 0x25, 0xB2, 0x69, 0x06, 0x93, 0xE4, 0x16, 0x53, 0x52, 0xC6, 0xBB } }, { { 0x25, 'X', "" }, 0, // Retail NCCH 7x key SHA256 { 0x7E, 0x87, 0x8D, 0xDE, 0x92, 0x93, 0x8E, 0x4C, 0x71, 0x7D, 0xD5, 0x3D, 0x1E, 0xA3, 0x5A, 0x75, 0x63, 0x3F, 0x51, 0x30, 0xD8, 0xCF, 0xD7, 0xC7, 0x6C, 0x8F, 0x4A, 0x8F, 0xB8, 0x70, 0x50, 0xCD } }/*, { { 0x18, 'X', "" }, 1, // DevKit NCCH Secure3 key SHA256 { 0x08, 0xE1, 0x09, 0x62, 0xF6, 0x5A, 0x09, 0xAA, 0x12, 0x2C, 0x7C, 0xBE, 0xDE, 0xA1, 0x9C, 0x4B, 0x5C, 0x9A, 0x8A, 0xC3, 0xD9, 0x8E, 0xA1, 0x62, 0x04, 0x11, 0xD7, 0xE8, 0x55, 0x70, 0xA6, 0xC2 } }, { { 0x1B, 'X', "" }, 1, // DevKit NCCH Secure4 key SHA256 { 0xA5, 0x3C, 0x3E, 0x5D, 0x09, 0x5C, 0x73, 0x35, 0x21, 0x79, 0x3F, 0x2E, 0x4C, 0x10, 0xCA, 0xAE, 0x87, 0x83, 0x51, 0x53, 0x46, 0x0B, 0x52, 0x39, 0x9B, 0x00, 0x62, 0xF6, 0x39, 0xCB, 0x62, 0x16 } }*/ }; u8 keySha256[32]; sha_quick(keySha256, key, 16, SHA256_MODE); for (u32 p = 0; p < sizeof(keyHashes) / sizeof(AesKeyHashInfo); p++) { if ((keyHashes[p].desc.slot != keyslot) || (keyHashes[p].desc.type != type)) continue; if ((!id && keyHashes[p].desc.id[0]) || (id && strncmp(id, keyHashes[p].desc.id, 10) != 0)) continue; if ((bool) keyHashes[p].isDevkitKey != (GetUnitKeysType() == KEYS_DEVKIT)) continue; if (memcmp(keySha256, keyHashes[p].keySha256, 32) == 0) { return 0; } } return 1; } u32 CheckKeySlot(u32 keyslot, char type) { static const AesNcchSampleInfo keyNcchSamples[] = { { 0x18, 0, // Retail NCCH Secure3 { 0x78, 0xBB, 0x84, 0xFA, 0xB3, 0xA2, 0x49, 0x83, 0x9E, 0x4F, 0x50, 0x7B, 0x17, 0xA0, 0xDA, 0x23 } }, { 0x1B, 0, // Retail NCCH Secure4 { 0xF3, 0x6F, 0x84, 0x7E, 0x59, 0x43, 0x6E, 0xD5, 0xA0, 0x40, 0x4C, 0x71, 0x19, 0xED, 0xF7, 0x0A } }, { 0x25, 0, // Retail NCCH 7x { 0x34, 0x7D, 0x07, 0x48, 0xAE, 0x5D, 0xFB, 0xB0, 0xF5, 0x86, 0xD6, 0xB5, 0x14, 0x65, 0xF1, 0xFF } }, { 0x18, 1, // DevKit NCCH Secure3 { 0x20, 0x8B, 0xB5, 0x61, 0x94, 0x18, 0x6A, 0x84, 0x91, 0xD6, 0x37, 0x27, 0x91, 0xF3, 0x53, 0xC9 } }, { 0x1B, 1, // DevKit NCCH Secure4 { 0xB3, 0x9D, 0xC1, 0xDB, 0x5B, 0x0C, 0xE7, 0x60, 0xBE, 0xAD, 0x5A, 0xBF, 0xD0, 0x86, 0x99, 0x88 } }, { 0x25, 1, // DevKit NCCH 7x { 0xBC, 0x83, 0x7C, 0xC9, 0x99, 0xC8, 0x80, 0x9E, 0x8A, 0xDE, 0x4A, 0xFA, 0xAA, 0x72, 0x08, 0x28 } } }; u64* state = (type == 'X') ? &keyXState : (type == 'Y') ? &keyYState : &keyState; // just to be safe... if (keyslot >= 0x40) return 1; // check if key is already loaded if ((*state >> keyslot) & 1) return 0; // if is not, we may still be able to verify the currently set one (for NCCH keys) for (u32 p = 0; (type == 'X') && (p < sizeof(keyNcchSamples) / sizeof(AesNcchSampleInfo)); p++) { if (keyNcchSamples[p].slot != keyslot) // only for keyslots in the keyNcchSamples table! continue; if ((bool) keyNcchSamples[p].isDevkitKey != (GetUnitKeysType() == KEYS_DEVKIT)) continue; u8 zeroes[16] = { 0 }; u8 sample[16] = { 0 }; setup_aeskeyY(keyslot, zeroes); use_aeskey(keyslot); set_ctr(zeroes); aes_decrypt(sample, sample, 1, AES_CNT_CTRNAND_MODE); if (memcmp(keyNcchSamples[p].sample, sample, 16) == 0) { keyXState |= (u64) 1 << keyslot; return 0; } } // not set up if getting here return 1; } u32 LoadKeyFromFile(u8* key, u32 keyslot, char type, char* id) { const char* base[] = { INPUT_PATHS }; u8 keystore[16] __attribute__((aligned(32))) = {0}; bool found = false; // use keystore if key == NULL if (!key) key = keystore; // checking the obvious if ((keyslot >= 0x40) || ((type != 'X') && (type != 'Y') && (type != 'N'))) return 1; // check if already loaded if (!id && (CheckKeySlot(keyslot, type) == 0)) return 0; // try to get key from 'aeskeydb.bin' file for (u32 i = 0; !found && (i < (sizeof(base)/sizeof(char*))); i++) { FIL fp; char path[64]; AesKeyInfo info; UINT btr; snprintf(path, 64, "%s/%s", base[i], KEYDB_NAME); if (f_open(&fp, path, FA_READ | FA_OPEN_EXISTING) != FR_OK) continue; while ((f_read(&fp, &info, sizeof(AesKeyInfo), &btr) == FR_OK) && (btr == sizeof(AesKeyInfo))) { if ((info.slot == keyslot) && (info.type == type) && ((!id && !(info.id[0])) || (id && (strncmp(id, info.id, 10) == 0)))) { found = true; if (info.isEncrypted) CryptAesKeyInfo(&info); memcpy(key, info.key, 16); break; } } f_close(&fp); } // load legacy slot0x??Key?.bin file instead if (!found) { for (u32 i = 0; !found && (i < (sizeof(base)/sizeof(char*))); i++) { FIL fp; char path[64]; UINT btr; snprintf(path, 64, "%s/slot0x%02lXKey%s.bin", base[i], keyslot, (id) ? id : (type == 'X') ? "X" : (type == 'Y') ? "Y" : ""); if (f_open(&fp, path, FA_READ | FA_OPEN_EXISTING) != FR_OK) continue; if ((f_read(&fp, key, 16, &btr) == FR_OK) && (btr == 16)) found = true; f_close(&fp); } } // key still not found (duh) if (!found) return 1; // out of options here // verify key (verification is enforced) if (CheckAesKeyInfo(key, keyslot, type, id) != 0) return 1; // now, setup the key if (type == 'X') { setup_aeskeyX(keyslot, key); keyXState |= (u64) 1 << keyslot; } else if (type == 'Y') { setup_aeskeyY(keyslot, key); keyYState |= (u64) 1 << keyslot; } else { // normalKey includes keyX & keyY setup_aeskey(keyslot, key); keyState |= (u64) 1 << keyslot; keyXState |= (u64) 1 << keyslot; keyYState |= (u64) 1 << keyslot; } use_aeskey(keyslot); return 0; }