RIPEMD-160: Difference between revisions
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<pre>b3be159860842cebaa7174c8fff0aa9e50a5199f</pre>
=={{header|C++}}==
<syntaxhighlight lang="c++">
#include <bit>
#include <cstdint>
#include <iomanip>
#include <iostream>
#include <stdexcept>
#include <sstream>
#include <string>
#include <vector>
class RIPEMD160 {
public:
std::string message_digest(const std::string& message) {
std::vector<int64_t> state = { 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0 };
std::vector<uint8_t> bytes = add_padding(message);
for ( uint64_t i = 0; i < bytes.size() / BLOCK_LENGTH; ++i ) {
std::vector<uint32_t> schedule(16, 0);
for ( uint32_t j = 0; j < BLOCK_LENGTH; ++j ) {
schedule[j / 4] |= ( bytes[i + j] ) << ( j % 4 * 8 );
}
int32_t a = state[0], b = state[1], c = state[2], d = state[3], e = state[4];
int32_t aa = state[0], bb = state[1], cc = state[2], dd = state[3], ee = state[4];
int32_t t = 0, tt = 0;
for ( uint32_t j = 0; j < 80; ++j ) {
uint32_t jj = j / 16;
t = std::rotl(a + ff(jj + 1, b, c, d) + schedule[RL[j]] + KL[jj], SL[j]) + e;
tt = std::rotl(aa + ff(5 - jj, bb, cc, dd) + schedule[RR[j]] + KR[jj], SR[j]) + ee;
a = e; e = d; d = std::rotl(static_cast<uint32_t>(c), 10); c = b; b = t;
aa = ee; ee = dd; dd = std::rotl(static_cast<uint32_t>(cc), 10); cc = bb; bb = tt;
}
t = state[1] + c + dd;
state[1] = state[2] + d + ee;
state[2] = state[3] + e + aa;
state[3] = state[4] + a + bb;
state[4] = state[0] + b + cc;
state[0] = t;
}
std::stringstream stream;
for ( uint32_t i = 0; i < state.size() * 4; ++i ) {
int8_t byte_value = static_cast<int8_t>(unsigned_right_shift(state[i / 4], i % 4 * 8));
stream << std::setfill('0') << std::setw(2) << std::hex << ( byte_value & 0xff );
}
return stream.str();
}
private:
const uint64_t TWO_POWER_32 = 4'294'967'296;
const uint32_t BLOCK_LENGTH = 64;
const std::vector<uint32_t> SR = { 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11 };
const std::vector<uint32_t> SL = { 11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6 };
const std::vector<uint32_t> RR = { 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11 };
const std::vector<uint32_t> RL = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13 };
const std::vector<uint32_t> KL = { 0x00000000, 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xa953fd4e };
const std::vector<uint32_t> KR = { 0x50a28be6, 0x5c4dd124, 0x6d703ef3, 0x7a6d76e9, 0x00000000 };
int32_t unsigned_right_shift(const int32_t& base, const int32_t& shift) {
if ( base == 0 || shift >= 32 ) {
return 0;
}
return ( base > 0 ) ? base >> shift : ( base + TWO_POWER_32 ) >> shift;
}
uint32_t ff(const uint32_t& group, const uint32_t& x, const uint32_t& y, const uint32_t& z) {
uint32_t result;
switch ( group ) {
case 1: result = x ^ y ^ z; break;
case 2: result = ( x & y ) | ( ~x & z ); break;
case 3: result = ( x | ~y ) ^ z; break;
case 4: result = ( x & z ) | ( y & ~z ); break;
case 5: result = x ^ ( y | ~z ); break;
default: throw std::invalid_argument("Unexpected argument: " + group);
};
return result;
}
std::vector<uint8_t> add_padding(const std::string& message) {
std::vector<uint8_t> bytes(message.begin(), message.end());
bytes.emplace_back(static_cast<uint8_t>(0x80));
uint32_t padding = BLOCK_LENGTH - ( bytes.size() % BLOCK_LENGTH );
if ( padding < 8 ) {
padding += BLOCK_LENGTH;
}
bytes.resize(bytes.size() + padding - 8, static_cast<uint8_t>(0x0));
const uint64_t bit_length = 8 * message.length();
for ( uint32_t i = 0; i < 8; ++i ) {
bytes.emplace_back(static_cast<uint8_t>( bit_length >> ( 8 * i ) ));
}
return bytes;
}
};
int main() {
RIPEMD160 ripemd160;
std::cout << ripemd160.message_digest("Rosetta Code") << std::endl;
}
</syntaxhighlight>
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<pre>
b3be159860842cebaa7174c8fff0aa9e50a5199f
</pre>
=={{header|Clojure}}==
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