diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lib/modes/cbc/cbc.cpp | 8 | ||||
| -rw-r--r-- | src/lib/modes/xts/xts.cpp | 12 |
2 files changed, 16 insertions, 4 deletions
diff --git a/src/lib/modes/cbc/cbc.cpp b/src/lib/modes/cbc/cbc.cpp index 31834bade..3095875f5 100644 --- a/src/lib/modes/cbc/cbc.cpp +++ b/src/lib/modes/cbc/cbc.cpp @@ -179,8 +179,8 @@ void CTS_Encryption::finish(secure_vector<byte>& buffer, size_t offset) for(size_t i = 0; i != final_bytes - BS; ++i) { - std::swap(last[i], last[i + BS]); last[i] ^= last[i + BS]; + last[i + BS] ^= last[i]; } cipher().encrypt(&last[0]); @@ -286,7 +286,11 @@ void CTS_Decryption::finish(secure_vector<byte>& buffer, size_t offset) xor_buf(&last[0], &last[BS], final_bytes - BS); for(size_t i = 0; i != final_bytes - BS; ++i) - std::swap(last[i], last[i + BS]); + { + last[i] ^= last[i + BS]; + last[i + BS] ^= last[i]; + last[i] ^= last[i + BS]; + } cipher().decrypt(&last[0]); xor_buf(&last[0], state_ptr(), BS); diff --git a/src/lib/modes/xts/xts.cpp b/src/lib/modes/xts/xts.cpp index 02da5fa5d..1b41a5a5d 100644 --- a/src/lib/modes/xts/xts.cpp +++ b/src/lib/modes/xts/xts.cpp @@ -197,7 +197,11 @@ void XTS_Encryption::finish(secure_vector<byte>& buffer, size_t offset) xor_buf(last, tweak(), BS); for(size_t i = 0; i != final_bytes - BS; ++i) - std::swap(last[i], last[i + BS]); + { + last[i] ^= last[i + BS]; + last[i + BS] ^= last[i]; + last[i] ^= last[i + BS]; + } xor_buf(last, tweak() + BS, BS); cipher().encrypt(last); @@ -272,7 +276,11 @@ void XTS_Decryption::finish(secure_vector<byte>& buffer, size_t offset) xor_buf(last, tweak() + BS, BS); for(size_t i = 0; i != final_bytes - BS; ++i) - std::swap(last[i], last[i + BS]); + { + last[i] ^= last[i + BS]; + last[i + BS] ^= last[i]; + last[i] ^= last[i + BS]; + } xor_buf(last, tweak(), BS); cipher().decrypt(last); |