/* * AES * (C) 1999-2010,2015,2017,2018 Jack Lloyd * * Based on the public domain reference implementation by Paulo Baretto * * Botan is released under the Simplified BSD License (see license.txt) */ #include #include #include #include #include /* * This implementation is based on table lookups which are known to be * vulnerable to timing and cache based side channel attacks. Some * countermeasures are used which may be helpful in some situations: * * - Only a single 256-word T-table is used, with rotations applied. * Most implementations use 4 (or sometimes 5) T-tables, which leaks * much more information via cache usage. * * - The TE and TD tables are computed at runtime to avoid flush+reload * attacks using clflush. As different processes will not share the * same underlying table data, an attacker can't manipulate another * processes cache lines via their shared reference to the library * read only segment. (However, prime+probe attacks are still possible.) * * - Each cache line of the lookup tables is accessed at the beginning * of each call to encrypt or decrypt. (See the Z variable below) * * If available SSSE3 or AES-NI are used instead of this version, as both * are faster and immune to side channel attacks. * * Some AES cache timing papers for reference: * * "Software mitigations to hedge AES against cache-based software side * channel vulnerabilities" https://eprint.iacr.org/2006/052.pdf * * "Cache Games - Bringing Access-Based Cache Attacks on AES to Practice" * http://www.ieee-security.org/TC/SP2011/PAPERS/2011/paper031.pdf * * "Cache-Collision Timing Attacks Against AES" Bonneau, Mironov * http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.88.4753 */ namespace Botan { namespace { alignas(64) const uint8_t SE[256] = { 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 }; alignas(64) const uint8_t SD[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 }; inline constexpr uint8_t xtime(uint8_t s) { return static_cast(s << 1) ^ ((s >> 7) * 0x1B); } inline constexpr uint8_t xtime4(uint8_t s) { return xtime(xtime(s)); } inline constexpr uint8_t xtime8(uint8_t s) { return xtime(xtime(xtime(s))); } inline constexpr uint8_t xtime3(uint8_t s) { return xtime(s) ^ s; } inline constexpr uint8_t xtime9(uint8_t s) { return xtime8(s) ^ s; } inline constexpr uint8_t xtime11(uint8_t s) { return xtime8(s) ^ xtime(s) ^ s; } inline constexpr uint8_t xtime13(uint8_t s) { return xtime8(s) ^ xtime4(s) ^ s; } inline constexpr uint8_t xtime14(uint8_t s) { return xtime8(s) ^ xtime4(s) ^ xtime(s); } inline uint32_t SE_word(uint32_t x) { return make_uint32(SE[get_byte(0, x)], SE[get_byte(1, x)], SE[get_byte(2, x)], SE[get_byte(3, x)]); } const uint32_t* AES_TE() { class TE_Table final { public: TE_Table() { uint32_t* p = reinterpret_cast(&data); for(size_t i = 0; i != 256; ++i) { const uint8_t s = SE[i]; p[i] = make_uint32(xtime(s), s, s, xtime3(s)); } } const uint32_t* ptr() const { return reinterpret_cast(&data); } private: std::aligned_storage<256*sizeof(uint32_t), 64>::type data; }; static TE_Table table; return table.ptr(); } const uint32_t* AES_TD() { class TD_Table final { public: TD_Table() { uint32_t* p = reinterpret_cast(&data); for(size_t i = 0; i != 256; ++i) { const uint8_t s = SD[i]; p[i] = make_uint32(xtime14(s), xtime9(s), xtime13(s), xtime11(s)); } } const uint32_t* ptr() const { return reinterpret_cast(&data); } private: std::aligned_storage<256*sizeof(uint32_t), 64>::type data; }; static TD_Table table; return table.ptr(); } #define AES_T(T, K, V0, V1, V2, V3) \ (K ^ T[get_byte(0, V0)] ^ \ rotr< 8>(T[get_byte(1, V1)]) ^ \ rotr<16>(T[get_byte(2, V2)]) ^ \ rotr<24>(T[get_byte(3, V3)])) /* * AES Encryption */ void aes_encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks, const secure_vector& EK, const secure_vector& ME) { BOTAN_ASSERT(EK.size() && ME.size() == 16, "Key was set"); const size_t cache_line_size = CPUID::cache_line_size(); const uint32_t* TE = AES_TE(); // Hit every cache line of TE volatile uint32_t Z = 0; for(size_t i = 0; i < 256; i += cache_line_size / sizeof(uint32_t)) { Z |= TE[i]; } Z &= TE[82]; // this is zero, which hopefully the compiler cannot deduce for(size_t i = 0; i < blocks; ++i) { uint32_t T0, T1, T2, T3; load_be(in + 16*i, T0, T1, T2, T3); T0 ^= EK[0]; T1 ^= EK[1]; T2 ^= EK[2]; T3 ^= EK[3]; T0 ^= Z; uint32_t B0 = AES_T(TE, EK[4], T0, T1, T2, T3); uint32_t B1 = AES_T(TE, EK[5], T1, T2, T3, T0); uint32_t B2 = AES_T(TE, EK[6], T2, T3, T0, T1); uint32_t B3 = AES_T(TE, EK[7], T3, T0, T1, T2); for(size_t r = 2*4; r < EK.size(); r += 2*4) { T0 = AES_T(TE, EK[r ], B0, B1, B2, B3); T1 = AES_T(TE, EK[r+1], B1, B2, B3, B0); T2 = AES_T(TE, EK[r+2], B2, B3, B0, B1); T3 = AES_T(TE, EK[r+3], B3, B0, B1, B2); B0 = AES_T(TE, EK[r+4], T0, T1, T2, T3); B1 = AES_T(TE, EK[r+5], T1, T2, T3, T0); B2 = AES_T(TE, EK[r+6], T2, T3, T0, T1); B3 = AES_T(TE, EK[r+7], T3, T0, T1, T2); } /* * Use TE[x] >> 8 instead of SE[] so encryption only references a single * lookup table. */ out[16*i+ 0] = static_cast(TE[get_byte(0, B0)] >> 8) ^ ME[0]; out[16*i+ 1] = static_cast(TE[get_byte(1, B1)] >> 8) ^ ME[1]; out[16*i+ 2] = static_cast(TE[get_byte(2, B2)] >> 8) ^ ME[2]; out[16*i+ 3] = static_cast(TE[get_byte(3, B3)] >> 8) ^ ME[3]; out[16*i+ 4] = static_cast(TE[get_byte(0, B1)] >> 8) ^ ME[4]; out[16*i+ 5] = static_cast(TE[get_byte(1, B2)] >> 8) ^ ME[5]; out[16*i+ 6] = static_cast(TE[get_byte(2, B3)] >> 8) ^ ME[6]; out[16*i+ 7] = static_cast(TE[get_byte(3, B0)] >> 8) ^ ME[7]; out[16*i+ 8] = static_cast(TE[get_byte(0, B2)] >> 8) ^ ME[8]; out[16*i+ 9] = static_cast(TE[get_byte(1, B3)] >> 8) ^ ME[9]; out[16*i+10] = static_cast(TE[get_byte(2, B0)] >> 8) ^ ME[10]; out[16*i+11] = static_cast(TE[get_byte(3, B1)] >> 8) ^ ME[11]; out[16*i+12] = static_cast(TE[get_byte(0, B3)] >> 8) ^ ME[12]; out[16*i+13] = static_cast(TE[get_byte(1, B0)] >> 8) ^ ME[13]; out[16*i+14] = static_cast(TE[get_byte(2, B1)] >> 8) ^ ME[14]; out[16*i+15] = static_cast(TE[get_byte(3, B2)] >> 8) ^ ME[15]; } } /* * AES Decryption */ void aes_decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks, const secure_vector& DK, const secure_vector& MD) { BOTAN_ASSERT(DK.size() && MD.size() == 16, "Key was set"); const size_t cache_line_size = CPUID::cache_line_size(); const uint32_t* TD = AES_TD(); volatile uint32_t Z = 0; for(size_t i = 0; i < 256; i += cache_line_size / sizeof(uint32_t)) { Z |= TD[i]; } for(size_t i = 0; i < 256; i += cache_line_size) { Z |= SD[i]; } Z &= TD[99]; // this is zero, which hopefully the compiler cannot deduce for(size_t i = 0; i != blocks; ++i) { uint32_t T0 = load_be(in, 0) ^ DK[0]; uint32_t T1 = load_be(in, 1) ^ DK[1]; uint32_t T2 = load_be(in, 2) ^ DK[2]; uint32_t T3 = load_be(in, 3) ^ DK[3]; T0 ^= Z; uint32_t B0 = AES_T(TD, DK[4], T0, T3, T2, T1); uint32_t B1 = AES_T(TD, DK[5], T1, T0, T3, T2); uint32_t B2 = AES_T(TD, DK[6], T2, T1, T0, T3); uint32_t B3 = AES_T(TD, DK[7], T3, T2, T1, T0); for(size_t r = 2*4; r < DK.size(); r += 2*4) { T0 = AES_T(TD, DK[r ], B0, B3, B2, B1); T1 = AES_T(TD, DK[r+1], B1, B0, B3, B2); T2 = AES_T(TD, DK[r+2], B2, B1, B0, B3); T3 = AES_T(TD, DK[r+3], B3, B2, B1, B0); B0 = AES_T(TD, DK[r+4], T0, T3, T2, T1); B1 = AES_T(TD, DK[r+5], T1, T0, T3, T2); B2 = AES_T(TD, DK[r+6], T2, T1, T0, T3); B3 = AES_T(TD, DK[r+7], T3, T2, T1, T0); } out[ 0] = SD[get_byte(0, B0)] ^ MD[0]; out[ 1] = SD[get_byte(1, B3)] ^ MD[1]; out[ 2] = SD[get_byte(2, B2)] ^ MD[2]; out[ 3] = SD[get_byte(3, B1)] ^ MD[3]; out[ 4] = SD[get_byte(0, B1)] ^ MD[4]; out[ 5] = SD[get_byte(1, B0)] ^ MD[5]; out[ 6] = SD[get_byte(2, B3)] ^ MD[6]; out[ 7] = SD[get_byte(3, B2)] ^ MD[7]; out[ 8] = SD[get_byte(0, B2)] ^ MD[8]; out[ 9] = SD[get_byte(1, B1)] ^ MD[9]; out[10] = SD[get_byte(2, B0)] ^ MD[10]; out[11] = SD[get_byte(3, B3)] ^ MD[11]; out[12] = SD[get_byte(0, B3)] ^ MD[12]; out[13] = SD[get_byte(1, B2)] ^ MD[13]; out[14] = SD[get_byte(2, B1)] ^ MD[14]; out[15] = SD[get_byte(3, B0)] ^ MD[15]; in += 16; out += 16; } } void aes_key_schedule(const uint8_t key[], size_t length, secure_vector& EK, secure_vector& DK, secure_vector& ME, secure_vector& MD) { static const uint32_t RC[10] = { 0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000, 0x20000000, 0x40000000, 0x80000000, 0x1B000000, 0x36000000 }; const size_t rounds = (length / 4) + 6; secure_vector XEK(length + 32), XDK(length + 32); const size_t X = length / 4; // Can't happen, but make static analyzers happy BOTAN_ARG_CHECK(X == 4 || X == 6 || X == 8, "Invalid AES key size"); const uint32_t* TD = AES_TD(); // Prefetch TD and SE which are used later on in this function volatile uint32_t Z = 0; const size_t cache_line_size = CPUID::cache_line_size(); for(size_t i = 0; i < 256; i += cache_line_size / sizeof(uint32_t)) { Z |= TD[i]; } for(size_t i = 0; i < 256; i += cache_line_size) { Z |= SE[i]; } Z &= TD[99]; // this is zero, which hopefully the compiler cannot deduce for(size_t i = 0; i != X; ++i) XEK[i] = Z ^ load_be(key, i); for(size_t i = X; i < 4*(rounds+1); i += X) { XEK[i] = XEK[i-X] ^ RC[(i-X)/X] ^ SE_word(rotl<8>(XEK[i-1])); for(size_t j = 1; j != X; ++j) { XEK[i+j] = XEK[i+j-X]; if(X == 8 && j == 4) XEK[i+j] ^= SE_word(XEK[i+j-1]); else XEK[i+j] ^= XEK[i+j-1]; } } for(size_t i = 0; i != 4*(rounds+1); i += 4) { XDK[i ] = XEK[4*rounds-i ]; XDK[i+1] = XEK[4*rounds-i+1]; XDK[i+2] = XEK[4*rounds-i+2]; XDK[i+3] = XEK[4*rounds-i+3]; } for(size_t i = 4; i != length + 24; ++i) { XDK[i] = Z ^ SE_word(XDK[i]); XDK[i] = AES_T(TD, 0, XDK[i], XDK[i], XDK[i], XDK[i]); } ME.resize(16); MD.resize(16); for(size_t i = 0; i != 4; ++i) { store_be(XEK[i+4*rounds], &ME[4*i]); store_be(XEK[i], &MD[4*i]); } EK.resize(length + 24); DK.resize(length + 24); copy_mem(EK.data(), XEK.data(), EK.size()); copy_mem(DK.data(), XDK.data(), DK.size()); #if defined(BOTAN_HAS_AES_ARMV8) if(CPUID::has_arm_aes()) { // ARM needs the subkeys to be byte reversed for(size_t i = 0; i != EK.size(); ++i) EK[i] = reverse_bytes(EK[i]); for(size_t i = 0; i != DK.size(); ++i) DK[i] = reverse_bytes(DK[i]); } #endif } #undef AES_T size_t aes_parallelism() { #if defined(BOTAN_HAS_AES_NI) if(CPUID::has_aes_ni()) { return 4; } #endif return 1; } const char* aes_provider() { #if defined(BOTAN_HAS_AES_NI) if(CPUID::has_aes_ni()) { return "aesni"; } #endif #if defined(BOTAN_HAS_AES_SSSE3) if(CPUID::has_ssse3()) { return "ssse3"; } #endif #if defined(BOTAN_HAS_AES_POWER8) if(CPUID::has_ppc_crypto()) { return "power8"; } #endif #if defined(BOTAN_HAS_AES_ARMV8) if(CPUID::has_arm_aes()) { return "armv8"; } #endif return "base"; } } std::string AES_128::provider() const { return aes_provider(); } std::string AES_192::provider() const { return aes_provider(); } std::string AES_256::provider() const { return aes_provider(); } size_t AES_128::parallelism() const { return aes_parallelism(); } size_t AES_192::parallelism() const { return aes_parallelism(); } size_t AES_256::parallelism() const { return aes_parallelism(); } void AES_128::encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const { verify_key_set(m_EK.empty() == false); #if defined(BOTAN_HAS_AES_NI) if(CPUID::has_aes_ni()) { return aesni_encrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_SSSE3) if(CPUID::has_ssse3()) { return ssse3_encrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_ARMV8) if(CPUID::has_arm_aes()) { return armv8_encrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_POWER8) if(CPUID::has_ppc_crypto()) { return power8_encrypt_n(in, out, blocks); } #endif aes_encrypt_n(in, out, blocks, m_EK, m_ME); } void AES_128::decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const { verify_key_set(m_DK.empty() == false); #if defined(BOTAN_HAS_AES_NI) if(CPUID::has_aes_ni()) { return aesni_decrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_SSSE3) if(CPUID::has_ssse3()) { return ssse3_decrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_ARMV8) if(CPUID::has_arm_aes()) { return armv8_decrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_POWER8) if(CPUID::has_ppc_crypto()) { return power8_decrypt_n(in, out, blocks); } #endif aes_decrypt_n(in, out, blocks, m_DK, m_MD); } void AES_128::key_schedule(const uint8_t key[], size_t length) { #if defined(BOTAN_HAS_AES_NI) if(CPUID::has_aes_ni()) { return aesni_key_schedule(key, length); } #endif #if defined(BOTAN_HAS_AES_SSSE3) if(CPUID::has_ssse3()) { return ssse3_key_schedule(key, length); } #endif aes_key_schedule(key, length, m_EK, m_DK, m_ME, m_MD); } void AES_128::clear() { zap(m_EK); zap(m_DK); zap(m_ME); zap(m_MD); } void AES_192::encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const { verify_key_set(m_EK.empty() == false); #if defined(BOTAN_HAS_AES_NI) if(CPUID::has_aes_ni()) { return aesni_encrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_SSSE3) if(CPUID::has_ssse3()) { return ssse3_encrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_ARMV8) if(CPUID::has_arm_aes()) { return armv8_encrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_POWER8) if(CPUID::has_ppc_crypto()) { return power8_encrypt_n(in, out, blocks); } #endif aes_encrypt_n(in, out, blocks, m_EK, m_ME); } void AES_192::decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const { verify_key_set(m_DK.empty() == false); #if defined(BOTAN_HAS_AES_NI) if(CPUID::has_aes_ni()) { return aesni_decrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_SSSE3) if(CPUID::has_ssse3()) { return ssse3_decrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_ARMV8) if(CPUID::has_arm_aes()) { return armv8_decrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_POWER8) if(CPUID::has_ppc_crypto()) { return power8_decrypt_n(in, out, blocks); } #endif aes_decrypt_n(in, out, blocks, m_DK, m_MD); } void AES_192::key_schedule(const uint8_t key[], size_t length) { #if defined(BOTAN_HAS_AES_NI) if(CPUID::has_aes_ni()) { return aesni_key_schedule(key, length); } #endif #if defined(BOTAN_HAS_AES_SSSE3) if(CPUID::has_ssse3()) { return ssse3_key_schedule(key, length); } #endif aes_key_schedule(key, length, m_EK, m_DK, m_ME, m_MD); } void AES_192::clear() { zap(m_EK); zap(m_DK); zap(m_ME); zap(m_MD); } void AES_256::encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const { verify_key_set(m_EK.empty() == false); #if defined(BOTAN_HAS_AES_NI) if(CPUID::has_aes_ni()) { return aesni_encrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_SSSE3) if(CPUID::has_ssse3()) { return ssse3_encrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_ARMV8) if(CPUID::has_arm_aes()) { return armv8_encrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_POWER8) if(CPUID::has_ppc_crypto()) { return power8_encrypt_n(in, out, blocks); } #endif aes_encrypt_n(in, out, blocks, m_EK, m_ME); } void AES_256::decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const { verify_key_set(m_DK.empty() == false); #if defined(BOTAN_HAS_AES_NI) if(CPUID::has_aes_ni()) { return aesni_decrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_SSSE3) if(CPUID::has_ssse3()) { return ssse3_decrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_ARMV8) if(CPUID::has_arm_aes()) { return armv8_decrypt_n(in, out, blocks); } #endif #if defined(BOTAN_HAS_AES_POWER8) if(CPUID::has_ppc_crypto()) { return power8_decrypt_n(in, out, blocks); } #endif aes_decrypt_n(in, out, blocks, m_DK, m_MD); } void AES_256::key_schedule(const uint8_t key[], size_t length) { #if defined(BOTAN_HAS_AES_NI) if(CPUID::has_aes_ni()) { return aesni_key_schedule(key, length); } #endif #if defined(BOTAN_HAS_AES_SSSE3) if(CPUID::has_ssse3()) { return ssse3_key_schedule(key, length); } #endif aes_key_schedule(key, length, m_EK, m_DK, m_ME, m_MD); } void AES_256::clear() { zap(m_EK); zap(m_DK); zap(m_ME); zap(m_MD); } }