aboutsummaryrefslogtreecommitdiffstats
path: root/src/block/rc6
diff options
context:
space:
mode:
Diffstat (limited to 'src/block/rc6')
-rw-r--r--src/block/rc6/rc6.cpp140
-rw-r--r--src/block/rc6/rc6.h6
2 files changed, 80 insertions, 66 deletions
diff --git a/src/block/rc6/rc6.cpp b/src/block/rc6/rc6.cpp
index 3b30ea93a..8bda62259 100644
--- a/src/block/rc6/rc6.cpp
+++ b/src/block/rc6/rc6.cpp
@@ -15,85 +15,97 @@ namespace Botan {
/*
* RC6 Encryption
*/
-void RC6::enc(const byte in[], byte out[]) const
+void RC6::encrypt_n(const byte in[], byte out[], u32bit blocks) const
{
- u32bit A = load_le<u32bit>(in, 0);
- u32bit B = load_le<u32bit>(in, 1);
- u32bit C = load_le<u32bit>(in, 2);
- u32bit D = load_le<u32bit>(in, 3);
+ for(u32bit i = 0; i != blocks; ++i)
+ {
+ u32bit A = load_le<u32bit>(in, 0);
+ u32bit B = load_le<u32bit>(in, 1);
+ u32bit C = load_le<u32bit>(in, 2);
+ u32bit D = load_le<u32bit>(in, 3);
- B += S[0]; D += S[1];
+ B += S[0]; D += S[1];
- for(u32bit j = 0; j != 20; j += 4)
- {
- u32bit T1, T2;
-
- T1 = rotate_left(B*(2*B+1), 5);
- T2 = rotate_left(D*(2*D+1), 5);
- A = rotate_left(A ^ T1, T2 % 32) + S[2*j+2];
- C = rotate_left(C ^ T2, T1 % 32) + S[2*j+3];
-
- T1 = rotate_left(C*(2*C+1), 5);
- T2 = rotate_left(A*(2*A+1), 5);
- B = rotate_left(B ^ T1, T2 % 32) + S[2*j+4];
- D = rotate_left(D ^ T2, T1 % 32) + S[2*j+5];
-
- T1 = rotate_left(D*(2*D+1), 5);
- T2 = rotate_left(B*(2*B+1), 5);
- C = rotate_left(C ^ T1, T2 % 32) + S[2*j+6];
- A = rotate_left(A ^ T2, T1 % 32) + S[2*j+7];
-
- T1 = rotate_left(A*(2*A+1), 5);
- T2 = rotate_left(C*(2*C+1), 5);
- D = rotate_left(D ^ T1, T2 % 32) + S[2*j+8];
- B = rotate_left(B ^ T2, T1 % 32) + S[2*j+9];
- }
+ for(u32bit j = 0; j != 20; j += 4)
+ {
+ u32bit T1, T2;
+
+ T1 = rotate_left(B*(2*B+1), 5);
+ T2 = rotate_left(D*(2*D+1), 5);
+ A = rotate_left(A ^ T1, T2 % 32) + S[2*j+2];
+ C = rotate_left(C ^ T2, T1 % 32) + S[2*j+3];
+
+ T1 = rotate_left(C*(2*C+1), 5);
+ T2 = rotate_left(A*(2*A+1), 5);
+ B = rotate_left(B ^ T1, T2 % 32) + S[2*j+4];
+ D = rotate_left(D ^ T2, T1 % 32) + S[2*j+5];
- A += S[42]; C += S[43];
+ T1 = rotate_left(D*(2*D+1), 5);
+ T2 = rotate_left(B*(2*B+1), 5);
+ C = rotate_left(C ^ T1, T2 % 32) + S[2*j+6];
+ A = rotate_left(A ^ T2, T1 % 32) + S[2*j+7];
- store_le(out, A, B, C, D);
+ T1 = rotate_left(A*(2*A+1), 5);
+ T2 = rotate_left(C*(2*C+1), 5);
+ D = rotate_left(D ^ T1, T2 % 32) + S[2*j+8];
+ B = rotate_left(B ^ T2, T1 % 32) + S[2*j+9];
+ }
+
+ A += S[42]; C += S[43];
+
+ store_le(out, A, B, C, D);
+
+ in += BLOCK_SIZE;
+ out += BLOCK_SIZE;
+ }
}
/*
* RC6 Decryption
*/
-void RC6::dec(const byte in[], byte out[]) const
+void RC6::decrypt_n(const byte in[], byte out[], u32bit blocks) const
{
- u32bit A = load_le<u32bit>(in, 0);
- u32bit B = load_le<u32bit>(in, 1);
- u32bit C = load_le<u32bit>(in, 2);
- u32bit D = load_le<u32bit>(in, 3);
+ for(u32bit i = 0; i != blocks; ++i)
+ {
+ u32bit A = load_le<u32bit>(in, 0);
+ u32bit B = load_le<u32bit>(in, 1);
+ u32bit C = load_le<u32bit>(in, 2);
+ u32bit D = load_le<u32bit>(in, 3);
- C -= S[43]; A -= S[42];
+ C -= S[43]; A -= S[42];
- for(u32bit j = 0; j != 20; j += 4)
- {
- u32bit T1, T2;
-
- T1 = rotate_left(A*(2*A+1), 5);
- T2 = rotate_left(C*(2*C+1), 5);
- B = rotate_right(B - S[41 - 2*j], T1 % 32) ^ T2;
- D = rotate_right(D - S[40 - 2*j], T2 % 32) ^ T1;
-
- T1 = rotate_left(D*(2*D+1), 5);
- T2 = rotate_left(B*(2*B+1), 5);
- A = rotate_right(A - S[39 - 2*j], T1 % 32) ^ T2;
- C = rotate_right(C - S[38 - 2*j], T2 % 32) ^ T1;
-
- T1 = rotate_left(C*(2*C+1), 5);
- T2 = rotate_left(A*(2*A+1), 5);
- D = rotate_right(D - S[37 - 2*j], T1 % 32) ^ T2;
- B = rotate_right(B - S[36 - 2*j], T2 % 32) ^ T1;
-
- T1 = rotate_left(B*(2*B+1), 5);
- T2 = rotate_left(D*(2*D+1), 5);
- C = rotate_right(C - S[35 - 2*j], T1 % 32) ^ T2;
- A = rotate_right(A - S[34 - 2*j], T2 % 32) ^ T1;
- }
+ for(u32bit j = 0; j != 20; j += 4)
+ {
+ u32bit T1, T2;
+
+ T1 = rotate_left(A*(2*A+1), 5);
+ T2 = rotate_left(C*(2*C+1), 5);
+ B = rotate_right(B - S[41 - 2*j], T1 % 32) ^ T2;
+ D = rotate_right(D - S[40 - 2*j], T2 % 32) ^ T1;
+
+ T1 = rotate_left(D*(2*D+1), 5);
+ T2 = rotate_left(B*(2*B+1), 5);
+ A = rotate_right(A - S[39 - 2*j], T1 % 32) ^ T2;
+ C = rotate_right(C - S[38 - 2*j], T2 % 32) ^ T1;
- D -= S[1]; B -= S[0];
+ T1 = rotate_left(C*(2*C+1), 5);
+ T2 = rotate_left(A*(2*A+1), 5);
+ D = rotate_right(D - S[37 - 2*j], T1 % 32) ^ T2;
+ B = rotate_right(B - S[36 - 2*j], T2 % 32) ^ T1;
- store_le(out, A, B, C, D);
+ T1 = rotate_left(B*(2*B+1), 5);
+ T2 = rotate_left(D*(2*D+1), 5);
+ C = rotate_right(C - S[35 - 2*j], T1 % 32) ^ T2;
+ A = rotate_right(A - S[34 - 2*j], T2 % 32) ^ T1;
+ }
+
+ D -= S[1]; B -= S[0];
+
+ store_le(out, A, B, C, D);
+
+ in += BLOCK_SIZE;
+ out += BLOCK_SIZE;
+ }
}
/*
diff --git a/src/block/rc6/rc6.h b/src/block/rc6/rc6.h
index cb2800be7..5171006f5 100644
--- a/src/block/rc6/rc6.h
+++ b/src/block/rc6/rc6.h
@@ -18,13 +18,15 @@ namespace Botan {
class BOTAN_DLL RC6 : public BlockCipher
{
public:
+ void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
+ void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
+
void clear() throw() { S.clear(); }
std::string name() const { return "RC6"; }
BlockCipher* clone() const { return new RC6; }
+
RC6() : BlockCipher(16, 1, 32) {}
private:
- void enc(const byte[], byte[]) const;
- void dec(const byte[], byte[]) const;
void key_schedule(const byte[], u32bit);
SecureBuffer<u32bit, 44> S;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 12:27:35 +0000