8 #include <botan/xtea_simd.h>     9 #include <botan/loadstor.h>    10 #include <botan/internal/simd_32.h>    16 void xtea_encrypt_8(
const byte in[64], 
byte out[64], 
const u32bit EK[64])
    23    SIMD_32::transpose(L0, R0, L1, R1);
    25    for(
size_t i = 0; i != 32; i += 2)
    28       SIMD_32 K1(EK[2*i+1]);
    29       SIMD_32 K2(EK[2*i+2]);
    30       SIMD_32 K3(EK[2*i+3]);
    32       L0 += (((R0 << 4) ^ (R0 >> 5)) + 
R0) ^ K0;
    33       L1 += (((R1 << 4) ^ (R1 >> 5)) + 
R1) ^ K0;
    35       R0 += (((L0 << 4) ^ (L0 >> 5)) + L0) ^ K1;
    36       R1 += (((L1 << 4) ^ (L1 >> 5)) + L1) ^ K1;
    38       L0 += (((R0 << 4) ^ (R0 >> 5)) + 
R0) ^ K2;
    39       L1 += (((R1 << 4) ^ (R1 >> 5)) + 
R1) ^ K2;
    41       R0 += (((L0 << 4) ^ (L0 >> 5)) + L0) ^ K3;
    42       R1 += (((L1 << 4) ^ (L1 >> 5)) + L1) ^ K3;
    45    SIMD_32::transpose(L0, R0, L1, R1);
    48    R0.store_be(out + 16);
    49    L1.store_be(out + 32);
    50    R1.store_be(out + 48);
    53 void xtea_decrypt_8(
const byte in[64], 
byte out[64], 
const u32bit EK[64])
    60    SIMD_32::transpose(L0, R0, L1, R1);
    62    for(
size_t i = 0; i != 32; i += 2)
    64       SIMD_32 K0(EK[63 - 2*i]);
    65       SIMD_32 K1(EK[62 - 2*i]);
    66       SIMD_32 K2(EK[61 - 2*i]);
    67       SIMD_32 K3(EK[60 - 2*i]);
    69       R0 -= (((L0 << 4) ^ (L0 >> 5)) + L0) ^ K0;
    70       R1 -= (((L1 << 4) ^ (L1 >> 5)) + L1) ^ K0;
    72       L0 -= (((R0 << 4) ^ (R0 >> 5)) + 
R0) ^ K1;
    73       L1 -= (((R1 << 4) ^ (R1 >> 5)) + 
R1) ^ K1;
    75       R0 -= (((L0 << 4) ^ (L0 >> 5)) + L0) ^ K2;
    76       R1 -= (((L1 << 4) ^ (L1 >> 5)) + L1) ^ K2;
    78       L0 -= (((R0 << 4) ^ (R0 >> 5)) + 
R0) ^ K3;
    79       L1 -= (((R1 << 4) ^ (R1 >> 5)) + 
R1) ^ K3;
    82    SIMD_32::transpose(L0, R0, L1, R1);
    85    R0.store_be(out + 16);
    86    L1.store_be(out + 32);
    87    R1.store_be(out + 48);
   101       xtea_encrypt_8(in, out, KS);
   120       xtea_decrypt_8(in, out, KS);
 T load_be(const byte in[], size_t off)
void encrypt_n(const byte in[], byte out[], size_t blocks) const
void encrypt_n(const byte in[], byte out[], size_t blocks) const
const SecureVector< u32bit > & get_EK() const
void decrypt_n(const byte in[], byte out[], size_t blocks) const
void decrypt_n(const byte in[], byte out[], size_t blocks) const