8 #include <botan/tiger.h>
9 #include <botan/exceptn.h>
10 #include <botan/parsing.h>
19 inline void mix(secure_vector<uint64_t>& X)
21 X[0] -= X[7] ^ 0xA5A5A5A5A5A5A5A5;
24 X[3] -= X[2] ^ ((~X[1]) << 19);
27 X[6] -= X[5] ^ ((~X[4]) >> 23);
31 X[1] -= X[0] ^ ((~X[7]) << 19);
34 X[4] -= X[3] ^ ((~X[2]) >> 23);
37 X[7] -= X[6] ^ 0x0123456789ABCDEF;
45 void Tiger::compress_n(
const uint8_t input[],
size_t blocks)
47 uint64_t A = m_digest[0], B = m_digest[1], C = m_digest[2];
49 for(
size_t i = 0; i != blocks; ++i)
51 load_le(m_X.data(), input, m_X.size());
53 pass(A, B, C, m_X, 5); mix(m_X);
54 pass(C, A, B, m_X, 7); mix(m_X);
55 pass(B, C, A, m_X, 9);
57 for(
size_t j = 3; j != m_passes; ++j)
60 pass(A, B, C, m_X, 9);
61 uint64_t T = A; A = C; C = B; B = T;
64 A = (m_digest[0] ^= A);
65 B = m_digest[1] = B - m_digest[1];
66 C = (m_digest[2] += C);
75 void Tiger::copy_out(uint8_t output[])
83 void Tiger::pass(uint64_t& A, uint64_t& B, uint64_t& C,
84 const secure_vector<uint64_t>& X,
151 m_digest[0] = 0x0123456789ABCDEF;
152 m_digest[1] = 0xFEDCBA9876543210;
153 m_digest[2] = 0xF096A5B4C3B2E187;
172 m_hash_len(hash_len),
std::string name() const override
std::string to_string(const BER_Object &obj)
size_t hash_block_size() const override
Tiger(size_t out_size=24, size_t passes=3)
T load_le(const uint8_t in[], size_t off)
size_t output_length() const override
uint8_t get_byte(size_t byte_num, T input)
void zeroise(std::vector< T, Alloc > &vec)
void copy_out_vec_le(uint8_t out[], size_t out_bytes, const std::vector< T, Alloc > &in)