diff options
| author | lloyd <[email protected]> | 2007-10-15 14:47:14 +0000 |
|---|---|---|
| committer | lloyd <[email protected]> | 2007-10-15 14:47:14 +0000 |
| commit | 4c10f9f00641d5826b388535bb76fc6ca6e48701 (patch) | |
| tree | 4dafcdd350dfb5e988c8f21b6337cd7a3bb456c1 | |
| parent | 24519471c61aa88c38c29475901e56616b34fe44 (diff) | |
Use shorter variable names in the TEA code.
| -rw-r--r-- | src/tea.cpp | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/src/tea.cpp b/src/tea.cpp index aa04b1df8..cb1cac79a 100644 --- a/src/tea.cpp +++ b/src/tea.cpp @@ -13,17 +13,17 @@ namespace Botan { *************************************************/ void TEA::enc(const byte in[], byte out[]) const { - u32bit left = load_be<u32bit>(in, 0), right = load_be<u32bit>(in, 1); + u32bit L = load_be<u32bit>(in, 0), R = load_be<u32bit>(in, 1); - u32bit sum = 0; + u32bit S = 0; for(u32bit j = 0; j != 32; ++j) { - sum += 0x9E3779B9; - left += ((right << 4) + K[0]) ^ (right + sum) ^ ((right >> 5) + K[1]); - right += ((left << 4) + K[2]) ^ (left + sum) ^ ((left >> 5) + K[3]); + S += 0x9E3779B9; + L += ((R << 4) + K[0]) ^ (R + S) ^ ((R >> 5) + K[1]); + R += ((L << 4) + K[2]) ^ (L + S) ^ ((L >> 5) + K[3]); } - store_be(out, left, right); + store_be(out, L, R); } /************************************************* @@ -31,17 +31,17 @@ void TEA::enc(const byte in[], byte out[]) const *************************************************/ void TEA::dec(const byte in[], byte out[]) const { - u32bit left = load_be<u32bit>(in, 0), right = load_be<u32bit>(in, 1); + u32bit L = load_be<u32bit>(in, 0), R = load_be<u32bit>(in, 1); - u32bit sum = 0xC6EF3720; + u32bit S = 0xC6EF3720; for(u32bit j = 0; j != 32; ++j) { - right -= ((left << 4) + K[2]) ^ (left + sum) ^ ((left >> 5) + K[3]); - left -= ((right << 4) + K[0]) ^ (right + sum) ^ ((right >> 5) + K[1]); - sum -= 0x9E3779B9; + R -= ((L << 4) + K[2]) ^ (L + S) ^ ((L >> 5) + K[3]); + L -= ((R << 4) + K[0]) ^ (R + S) ^ ((R >> 5) + K[1]); + S -= 0x9E3779B9; } - store_be(out, left, right); + store_be(out, L, R); } /************************************************* |