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@@ -1,187 +1,27 @@
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#include <udpsocket.hpp>
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#include <cstdint>
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-constexpr std::uint32_t sha256_k[64] = {0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
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- 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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- 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
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- 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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- 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
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- 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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- 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
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- 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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- 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
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- 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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- 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
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- 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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- 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
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- 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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- 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
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- 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2};
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-class SHA256{
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-protected:
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- typedef unsigned char uint8;
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- typedef unsigned int uint32;
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- typedef unsigned long long uint64;
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- static const unsigned int SHA224_256_BLOCK_SIZE = (512/8);
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-public:
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- void init();
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- void update(const unsigned char *message, unsigned int len);
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- void final(unsigned char *digest);
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- static const unsigned int DIGEST_SIZE = ( 256 / 8);
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-
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-protected:
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- void transform(const unsigned char *message, unsigned int block_nb);
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- unsigned int m_tot_len;
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- unsigned int m_len;
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- unsigned char m_block[2*SHA224_256_BLOCK_SIZE];
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- uint32 m_h[8];
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-};
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-#define SHA2_SHFR(x, n) (x >> n)
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-#define SHA2_ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
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-#define SHA2_ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
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-#define SHA2_CH(x, y, z) ((x & y) ^ (~x & z))
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-#define SHA2_MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
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-#define SHA256_F1(x) (SHA2_ROTR(x, 2) ^ SHA2_ROTR(x, 13) ^ SHA2_ROTR(x, 22))
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-#define SHA256_F2(x) (SHA2_ROTR(x, 6) ^ SHA2_ROTR(x, 11) ^ SHA2_ROTR(x, 25))
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-#define SHA256_F3(x) (SHA2_ROTR(x, 7) ^ SHA2_ROTR(x, 18) ^ SHA2_SHFR(x, 3))
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-#define SHA256_F4(x) (SHA2_ROTR(x, 17) ^ SHA2_ROTR(x, 19) ^ SHA2_SHFR(x, 10))
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-#define SHA2_UNPACK32(x, str) \
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-{ \
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- *((str) + 3) = (uint8) ((x) ); \
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- *((str) + 2) = (uint8) ((x) >> 8); \
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- *((str) + 1) = (uint8) ((x) >> 16); \
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- *((str) + 0) = (uint8) ((x) >> 24); \
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-}
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-#define SHA2_PACK32(str, x) \
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-{ \
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- *(x) = ((uint32) *((str) + 3) ) \
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- | ((uint32) *((str) + 2) << 8) \
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- | ((uint32) *((str) + 1) << 16) \
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- | ((uint32) *((str) + 0) << 24); \
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-}
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-void sha256(std::uint64_t*, const std::string&);
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-
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-void SHA256::transform(const unsigned char *message, unsigned int block_nb){
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- uint32 w[64];
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- uint32 wv[8];
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- uint32 t1, t2;
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- const unsigned char *sub_block;
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- int i;
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- int j;
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- for (i = 0; i < (int) block_nb; i++) {
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- sub_block = message + (i << 6);
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- for (j = 0; j < 16; j++) {
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- SHA2_PACK32(&sub_block[j << 2], &w[j]);
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- }
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- for (j = 16; j < 64; j++) {
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- w[j] = SHA256_F4(w[j - 2]) + w[j - 7] + SHA256_F3(w[j - 15]) + w[j - 16];
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- }
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- for (j = 0; j < 8; j++) {
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- wv[j] = m_h[j];
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- }
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- for (j = 0; j < 64; j++) {
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- t1 = wv[7] + SHA256_F2(wv[4]) + SHA2_CH(wv[4], wv[5], wv[6])
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- + sha256_k[j] + w[j];
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- t2 = SHA256_F1(wv[0]) + SHA2_MAJ(wv[0], wv[1], wv[2]);
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- wv[7] = wv[6];
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- wv[6] = wv[5];
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- wv[5] = wv[4];
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- wv[4] = wv[3] + t1;
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- wv[3] = wv[2];
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- wv[2] = wv[1];
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- wv[1] = wv[0];
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- wv[0] = t1 + t2;
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- }
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- for (j = 0; j < 8; j++) {
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- m_h[j] += wv[j];
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- }
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- }
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-}
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-
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-void SHA256::init(){
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- m_h[0] = 0x6a09e667;
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- m_h[1] = 0xbb67ae85;
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- m_h[2] = 0x3c6ef372;
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- m_h[3] = 0xa54ff53a;
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- m_h[4] = 0x510e527f;
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- m_h[5] = 0x9b05688c;
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- m_h[6] = 0x1f83d9ab;
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- m_h[7] = 0x5be0cd19;
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- m_len = 0;
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- m_tot_len = 0;
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-}
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-
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-void SHA256::update(const unsigned char *message, unsigned int len){
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- unsigned int block_nb;
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- unsigned int new_len, rem_len, tmp_len;
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- const unsigned char *shifted_message;
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- tmp_len = SHA224_256_BLOCK_SIZE - m_len;
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- rem_len = len < tmp_len ? len : tmp_len;
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- memcpy(&m_block[m_len], message, rem_len);
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- if (m_len + len < SHA224_256_BLOCK_SIZE) {
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- m_len += len;
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- return;
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- }
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- new_len = len - rem_len;
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- block_nb = new_len / SHA224_256_BLOCK_SIZE;
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- shifted_message = message + rem_len;
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- transform(m_block, 1);
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- transform(shifted_message, block_nb);
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- rem_len = new_len % SHA224_256_BLOCK_SIZE;
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- memcpy(m_block, &shifted_message[block_nb << 6], rem_len);
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- m_len = rem_len;
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- m_tot_len += (block_nb + 1) << 6;
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-}
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-
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-void SHA256::final(unsigned char *digest){
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- unsigned int block_nb;
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- unsigned int pm_len;
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- unsigned int len_b;
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- int i;
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- block_nb = (1 + ((SHA224_256_BLOCK_SIZE - 9)
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- < (m_len % SHA224_256_BLOCK_SIZE)));
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- len_b = (m_tot_len + m_len) << 3;
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- pm_len = block_nb << 6;
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- memset(m_block + m_len, 0, pm_len - m_len);
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- m_block[m_len] = 0x80;
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- SHA2_UNPACK32(len_b, m_block + pm_len - 4);
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- transform(m_block, block_nb);
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- for (i = 0 ; i < 8; i++) {
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- SHA2_UNPACK32(m_h[i], &digest[i << 2]);
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- }
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-}
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-
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-void sha256(uint64_t* dest, const std::string& input){
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- unsigned char digest[SHA256::DIGEST_SIZE];
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- memset(digest,0,SHA256::DIGEST_SIZE);
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-
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- SHA256 ctx = SHA256();
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- ctx.init();
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- ctx.update((const unsigned char*)input.c_str(), input.length());
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- ctx.final(digest);
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- unsigned char* cdest = (unsigned char*) dest;
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- memcpy(dest, digest, SHA256::DIGEST_SIZE);
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-}
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-
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-packet::packet(const std::string& content, const std::string& dest, int port) : m_port(port){
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+#include <hash.hpp>
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+#include <algorithm>
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+packet::packet(const std::vector<char>& content, const std::string& dest, int port) : m_port(port){
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hostent *server_host;
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errno = 0;
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server_host = gethostbyname(dest.c_str());
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- if(errno){
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+ if(errno != 0){
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throw std::logic_error("Could not resolve hostname " + dest + ": " + strerror(errno));
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}
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/* configure the server address */
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- struct sockaddr_in server_addr;
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- server_addr.sin_family = AF_INET; // IPv4
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- memcpy(&server_addr.sin_addr, server_host->h_addr,
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- sizeof(struct in_addr)); server_addr.sin_port = htons(port);
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+ addr.sin_family = AF_INET; // IPv4
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+ memcpy(&addr.sin_addr, server_host->h_addr,
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+ sizeof(struct in_addr));
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+ addr.sin_port = htons(port);
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this->content = content;
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- sha256(checksum, this->content);
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+ hash(checksum, this->content);
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}
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-void packet::setContent(const std::string& content){
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- this->content = content;
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- sha256(checksum, this->content);
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+void packet::setContent(const std::vector<char>& _content){
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+ this->content = _content;
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+ hash(checksum, this->content);
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}
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-
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+packet::packet(const std::string& content, const std::string& dest, int port) : packet(std::vector<char>(content.begin(), content.end()),dest,port){}
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udpsocket::udpsocket(int port) : m_port(port){
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if ((s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
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throw std::logic_error(std::string("Socket creation failed: ") + strerror(errno));
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@@ -228,6 +68,13 @@ void udpsocket::write(const std::vector<char>& msg, const std::string& dest, int
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throw std::logic_error(std::string("Could not send packet: ") + strerror(errno));
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}
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}
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+
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+void udpsocket::write(const packet& pack)const{
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+ if(sendto(s, pack.content.data(), pack.content.size(), 0,(const sockaddr*)&pack.addr, sizeof(pack.addr)) < 0){
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+ throw std::logic_error(std::string("Could not send packet: ") + strerror(errno));
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+ }
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+}
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+
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std::vector<char> udpsocket::receive()const{
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std::vector<char> ret(1024);
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int l;
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@@ -243,3 +90,10 @@ void udpsocket::close(){
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int udpsocket::port()const {
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return this->m_port;
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}
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+int main(){
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+ udpsocket sock(18000);
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+ packet pack("Hhallo", "127.0.0.1", 15666);
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+ while(true)
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+ sock.write(pack);
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+ return 0;
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+}
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mawinkle