diff options
Diffstat (limited to 'src/block')
| -rw-r--r-- | src/block/xtea/xtea.cpp | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/src/block/xtea/xtea.cpp b/src/block/xtea/xtea.cpp index 83c7d9ce5..1179d011a 100644 --- a/src/block/xtea/xtea.cpp +++ b/src/block/xtea/xtea.cpp @@ -16,10 +16,8 @@ namespace { void xtea_encrypt_4(const byte in[32], byte out[32], const u32bit EK[64]) { - u32bit L0 = load_be<u32bit>(in, 0), R0 = load_be<u32bit>(in, 1); - u32bit L1 = load_be<u32bit>(in, 2), R1 = load_be<u32bit>(in, 3); - u32bit L2 = load_be<u32bit>(in, 4), R2 = load_be<u32bit>(in, 5); - u32bit L3 = load_be<u32bit>(in, 6), R3 = load_be<u32bit>(in, 7); + u32bit L0, R0, L1, R1, L2, R2, L3, R3; + load_be(in, L0, R0, L1, R1, L2, R2, L3, R3); for(u32bit i = 0; i != 32; ++i) { @@ -34,16 +32,13 @@ void xtea_encrypt_4(const byte in[32], byte out[32], const u32bit EK[64]) R3 += (((L3 << 4) ^ (L3 >> 5)) + L3) ^ EK[2*i+1]; } - store_be(out , L0, R0, L1, R1); - store_be(out + 16, L2, R2, L3, R3); + store_be(out, L0, R0, L1, R1, L2, R2, L3, R3); } void xtea_decrypt_4(const byte in[32], byte out[32], const u32bit EK[64]) { - u32bit L0 = load_be<u32bit>(in, 0), R0 = load_be<u32bit>(in, 1); - u32bit L1 = load_be<u32bit>(in, 2), R1 = load_be<u32bit>(in, 3); - u32bit L2 = load_be<u32bit>(in, 4), R2 = load_be<u32bit>(in, 5); - u32bit L3 = load_be<u32bit>(in, 6), R3 = load_be<u32bit>(in, 7); + u32bit L0, R0, L1, R1, L2, R2, L3, R3; + load_be(in, L0, R0, L1, R1, L2, R2, L3, R3); for(u32bit i = 0; i != 32; ++i) { @@ -58,8 +53,7 @@ void xtea_decrypt_4(const byte in[32], byte out[32], const u32bit EK[64]) L3 -= (((R3 << 4) ^ (R3 >> 5)) + R3) ^ EK[62 - 2*i]; } - store_be(out , L0, R0, L1, R1); - store_be(out + 16, L2, R2, L3, R3); + store_be(out, L0, R0, L1, R1, L2, R2, L3, R3); } } |