diff options
Diffstat (limited to 'src/block/blowfish/blowfish.cpp')
| -rw-r--r-- | src/block/blowfish/blowfish.cpp | 70 |
1 files changed, 41 insertions, 29 deletions
diff --git a/src/block/blowfish/blowfish.cpp b/src/block/blowfish/blowfish.cpp index b0599d6c5..312603c3a 100644 --- a/src/block/blowfish/blowfish.cpp +++ b/src/block/blowfish/blowfish.cpp @@ -1,6 +1,6 @@ /* * Blowfish -* (C) 1999-2007 Jack Lloyd +* (C) 1999-2009 Jack Lloyd * * Distributed under the terms of the Botan license */ @@ -13,59 +13,71 @@ namespace Botan { /* * Blowfish Encryption */ -void Blowfish::enc(const byte in[], byte out[]) const +void Blowfish::encrypt_n(const byte in[], byte out[], u32bit blocks) const { const u32bit* S1 = S + 0; const u32bit* S2 = S + 256; const u32bit* S3 = S + 512; const u32bit* S4 = S + 768; - u32bit L = load_be<u32bit>(in, 0); - u32bit R = load_be<u32bit>(in, 1); - - for(u32bit j = 0; j != 16; j += 2) + for(u32bit i = 0; i != blocks; ++i) { - L ^= P[j]; - R ^= ((S1[get_byte(0, L)] + S2[get_byte(1, L)]) ^ - S3[get_byte(2, L)]) + S4[get_byte(3, L)]; + u32bit L = load_be<u32bit>(in, 0); + u32bit R = load_be<u32bit>(in, 1); - R ^= P[j+1]; - L ^= ((S1[get_byte(0, R)] + S2[get_byte(1, R)]) ^ - S3[get_byte(2, R)]) + S4[get_byte(3, R)]; - } + for(u32bit j = 0; j != 16; j += 2) + { + L ^= P[j]; + R ^= ((S1[get_byte(0, L)] + S2[get_byte(1, L)]) ^ + S3[get_byte(2, L)]) + S4[get_byte(3, L)]; - L ^= P[16]; R ^= P[17]; + R ^= P[j+1]; + L ^= ((S1[get_byte(0, R)] + S2[get_byte(1, R)]) ^ + S3[get_byte(2, R)]) + S4[get_byte(3, R)]; + } + + L ^= P[16]; R ^= P[17]; - store_be(out, R, L); + store_be(out, R, L); + + in += BLOCK_SIZE; + out += BLOCK_SIZE; + } } /* * Blowfish Decryption */ -void Blowfish::dec(const byte in[], byte out[]) const +void Blowfish::decrypt_n(const byte in[], byte out[], u32bit blocks) const { const u32bit* S1 = S + 0; const u32bit* S2 = S + 256; const u32bit* S3 = S + 512; const u32bit* S4 = S + 768; - u32bit L = load_be<u32bit>(in, 0); - u32bit R = load_be<u32bit>(in, 1); - - for(u32bit j = 17; j != 1; j -= 2) + for(u32bit i = 0; i != blocks; ++i) { - L ^= P[j]; - R ^= ((S1[get_byte(0, L)] + S2[get_byte(1, L)]) ^ - S3[get_byte(2, L)]) + S4[get_byte(3, L)]; + u32bit L = load_be<u32bit>(in, 0); + u32bit R = load_be<u32bit>(in, 1); - R ^= P[j-1]; - L ^= ((S1[get_byte(0, R)] + S2[get_byte(1, R)]) ^ - S3[get_byte(2, R)]) + S4[get_byte(3, R)]; - } + for(u32bit j = 17; j != 1; j -= 2) + { + L ^= P[j]; + R ^= ((S1[get_byte(0, L)] + S2[get_byte(1, L)]) ^ + S3[get_byte(2, L)]) + S4[get_byte(3, L)]; - L ^= P[1]; R ^= P[0]; + R ^= P[j-1]; + L ^= ((S1[get_byte(0, R)] + S2[get_byte(1, R)]) ^ + S3[get_byte(2, R)]) + S4[get_byte(3, R)]; + } + + L ^= P[1]; R ^= P[0]; - store_be(out, R, L); + store_be(out, R, L); + + in += BLOCK_SIZE; + out += BLOCK_SIZE; + } } /* |