/* * Support classes for the Pedro mini-XMPP client * * Authors: * Bob Jamison * * Copyright (C) 2005-2006 Bob Jamison * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include "pedroutil.h" #ifdef __WIN32__ #include #else /* UNIX */ #include #include #include #include #include #include #include #endif /* UNIX */ namespace Pedro { //######################################################################## //######################################################################## //# B A S E 6 4 //######################################################################## //######################################################################## //################# //# ENCODER //################# static char *base64encode = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; /** * Writes the specified byte to the output buffer */ void Base64Encoder::append(int ch) { outBuf <<= 8; outBuf |= (ch & 0xff); bitCount += 8; if (bitCount >= 24) { int indx = (int)((outBuf & 0x00fc0000L) >> 18); int obyte = (int)base64encode[indx & 63]; buf.push_back(obyte); indx = (int)((outBuf & 0x0003f000L) >> 12); obyte = (int)base64encode[indx & 63]; buf.push_back(obyte); indx = (int)((outBuf & 0x00000fc0L) >> 6); obyte = (int)base64encode[indx & 63]; buf.push_back(obyte); indx = (int)((outBuf & 0x0000003fL) ); obyte = (int)base64encode[indx & 63]; buf.push_back(obyte); bitCount = 0; outBuf = 0L; } } /** * Writes the specified string to the output buffer */ void Base64Encoder::append(char *str) { while (*str) append((int)*str++); } /** * Writes the specified string to the output buffer */ void Base64Encoder::append(unsigned char *str, int len) { while (len>0) { append((int)*str++); len--; } } /** * Writes the specified string to the output buffer */ void Base64Encoder::append(const DOMString &str) { append((char *)str.c_str()); } /** * Closes this output stream and releases any system resources * associated with this stream. */ DOMString Base64Encoder::finish() { //get any last bytes (1 or 2) out of the buffer if (bitCount == 16) { outBuf <<= 2; //pad to make 18 bits int indx = (int)((outBuf & 0x0003f000L) >> 12); int obyte = (int)base64encode[indx & 63]; buf.push_back(obyte); indx = (int)((outBuf & 0x00000fc0L) >> 6); obyte = (int)base64encode[indx & 63]; buf.push_back(obyte); indx = (int)((outBuf & 0x0000003fL) ); obyte = (int)base64encode[indx & 63]; buf.push_back(obyte); buf.push_back('='); } else if (bitCount == 8) { outBuf <<= 4; //pad to make 12 bits int indx = (int)((outBuf & 0x00000fc0L) >> 6); int obyte = (int)base64encode[indx & 63]; buf.push_back(obyte); indx = (int)((outBuf & 0x0000003fL) ); obyte = (int)base64encode[indx & 63]; buf.push_back(obyte); buf.push_back('='); buf.push_back('='); } DOMString ret = buf; reset(); return ret; } DOMString Base64Encoder::encode(const DOMString &str) { Base64Encoder encoder; encoder.append(str); DOMString ret = encoder.finish(); return ret; } //################# //# DECODER //################# static int base64decode[] = { /*00*/ -1, -1, -1, -1, -1, -1, -1, -1, /*08*/ -1, -1, -1, -1, -1, -1, -1, -1, /*10*/ -1, -1, -1, -1, -1, -1, -1, -1, /*18*/ -1, -1, -1, -1, -1, -1, -1, -1, /*20*/ -1, -1, -1, -1, -1, -1, -1, -1, /*28*/ -1, -1, -1, 62, -1, -1, -1, 63, /*30*/ 52, 53, 54, 55, 56, 57, 58, 59, /*38*/ 60, 61, -1, -1, -1, -1, -1, -1, /*40*/ -1, 0, 1, 2, 3, 4, 5, 6, /*48*/ 7, 8, 9, 10, 11, 12, 13, 14, /*50*/ 15, 16, 17, 18, 19, 20, 21, 22, /*58*/ 23, 24, 25, -1, -1, -1, -1, -1, /*60*/ -1, 26, 27, 28, 29, 30, 31, 32, /*68*/ 33, 34, 35, 36, 37, 38, 39, 40, /*70*/ 41, 42, 43, 44, 45, 46, 47, 48, /*78*/ 49, 50, 51, -1, -1, -1, -1, -1 }; /** * Appends one char to the decoder */ void Base64Decoder::append(int ch) { if (isspace(ch)) return; else if (ch == '=') //padding { inBytes[inCount++] = 0; } else { int byteVal = base64decode[ch & 0x7f]; //printf("char:%c %d\n", ch, byteVal); if (byteVal < 0) { //Bad lookup value } inBytes[inCount++] = byteVal; } if (inCount >=4 ) { unsigned char b0 = ((inBytes[0]<<2) & 0xfc) | ((inBytes[1]>>4) & 0x03); unsigned char b1 = ((inBytes[1]<<4) & 0xf0) | ((inBytes[2]>>2) & 0x0f); unsigned char b2 = ((inBytes[2]<<6) & 0xc0) | ((inBytes[3] ) & 0x3f); buf.push_back(b0); buf.push_back(b1); buf.push_back(b2); inCount = 0; } } void Base64Decoder::append(char *str) { while (*str) append((int)*str++); } void Base64Decoder::append(const DOMString &str) { append((char *)str.c_str()); } std::vector Base64Decoder::finish() { std::vector ret = buf; reset(); return ret; } std::vector Base64Decoder::decode(const DOMString &str) { Base64Decoder decoder; decoder.append(str); std::vector ret = decoder.finish(); return ret; } DOMString Base64Decoder::decodeToString(const DOMString &str) { Base64Decoder decoder; decoder.append(str); std::vector ret = decoder.finish(); DOMString buf; for (unsigned int i=0 ; i>4) & 15 ]); ret.push_back(sha1hex[ ch & 15 ]); } return ret; } void Sha1::init() { lenW = 0; sizeHi = 0; sizeLo = 0; // Initialize H with the magic constants (see FIPS180 for constants) H[0] = 0x67452301L; H[1] = 0xefcdab89L; H[2] = 0x98badcfeL; H[3] = 0x10325476L; H[4] = 0xc3d2e1f0L; for (int i = 0; i < 80; i++) W[i] = 0; } void Sha1::append(unsigned char *dataIn, int len) { // Read the data into W and process blocks as they get full for (int i = 0; i < len; i++) { W[lenW / 4] <<= 8; W[lenW / 4] |= (unsigned long)dataIn[i]; if ((++lenW) % 64 == 0) { hashblock(); lenW = 0; } sizeLo += 8; sizeHi += (sizeLo < 8); } } void Sha1::finish(unsigned char hashout[20]) { unsigned char pad0x80 = 0x80; unsigned char pad0x00 = 0x00; unsigned char padlen[8]; // Pad with a binary 1 (e.g. 0x80), then zeroes, then length padlen[0] = (unsigned char)((sizeHi >> 24) & 255); padlen[1] = (unsigned char)((sizeHi >> 16) & 255); padlen[2] = (unsigned char)((sizeHi >> 8) & 255); padlen[3] = (unsigned char)((sizeHi >> 0) & 255); padlen[4] = (unsigned char)((sizeLo >> 24) & 255); padlen[5] = (unsigned char)((sizeLo >> 16) & 255); padlen[6] = (unsigned char)((sizeLo >> 8) & 255); padlen[7] = (unsigned char)((sizeLo >> 0) & 255); append(&pad0x80, 1); while (lenW != 56) append(&pad0x00, 1); append(padlen, 8); // Output hash for (int i = 0; i < 20; i++) { hashout[i] = (unsigned char)(H[i / 4] >> 24); H[i / 4] <<= 8; } // Re-initialize the context (also zeroizes contents) init(); } #define SHA_ROTL(X,n) ((((X) << (n)) | ((X) >> (32-(n)))) & 0xffffffffL) void Sha1::hashblock() { for (int t = 16; t <= 79; t++) W[t] = SHA_ROTL(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16], 1); unsigned long A = H[0]; unsigned long B = H[1]; unsigned long C = H[2]; unsigned long D = H[3]; unsigned long E = H[4]; unsigned long TEMP; for (int t = 0; t <= 19; t++) { TEMP = (SHA_ROTL(A,5) + (((C^D)&B)^D) + E + W[t] + 0x5a827999L) & 0xffffffffL; E = D; D = C; C = SHA_ROTL(B, 30); B = A; A = TEMP; } for (int t = 20; t <= 39; t++) { TEMP = (SHA_ROTL(A,5) + (B^C^D) + E + W[t] + 0x6ed9eba1L) & 0xffffffffL; E = D; D = C; C = SHA_ROTL(B, 30); B = A; A = TEMP; } for (int t = 40; t <= 59; t++) { TEMP = (SHA_ROTL(A,5) + ((B&C)|(D&(B|C))) + E + W[t] + 0x8f1bbcdcL) & 0xffffffffL; E = D; D = C; C = SHA_ROTL(B, 30); B = A; A = TEMP; } for (int t = 60; t <= 79; t++) { TEMP = (SHA_ROTL(A,5) + (B^C^D) + E + W[t] + 0xca62c1d6L) & 0xffffffffL; E = D; D = C; C = SHA_ROTL(B, 30); B = A; A = TEMP; } H[0] += A; H[1] += B; H[2] += C; H[3] += D; H[4] += E; } //######################################################################## //######################################################################## //### M D 5 H A S H I N G //######################################################################## //######################################################################## void Md5::hash(unsigned char *dataIn, unsigned long len, unsigned char *digest) { Md5 md5; md5.append(dataIn, len); md5.finish(digest); } DOMString Md5::hashHex(unsigned char *dataIn, unsigned long len) { Md5 md5; md5.append(dataIn, len); DOMString ret = md5.finishHex(); return ret; } /* * Note: this code is harmless on little-endian machines. */ /* static void byteReverse(unsigned char *buf, unsigned long longs) { do { unsigned long t = (unsigned long) ((unsigned) buf[3] << 8 | buf[2]) << 16 | ((unsigned) buf[1] << 8 | buf[0]); *(unsigned long *) buf = t; buf += 4; } while (--longs); } */ static void md5_memcpy(void *dest, void *src, int n) { unsigned char *s1 = (unsigned char *)dest; unsigned char *s2 = (unsigned char *)src; while (n--) *s1++ = *s2++; } static void md5_memset(void *dest, char v, int n) { unsigned char *s = (unsigned char *)dest; while (n--) *s++ = v; } /** * Initialize MD5 polynomials and storage */ void Md5::init() { buf[0] = 0x67452301; buf[1] = 0xefcdab89; buf[2] = 0x98badcfe; buf[3] = 0x10325476; bits[0] = 0; bits[1] = 0; } /* * Update context to reflect the concatenation of another buffer full * of bytes. */ void Md5::append(unsigned char *source, unsigned long len) { // Update bitcount unsigned long t = bits[0]; if ((bits[0] = t + ((unsigned long) len << 3)) < t) bits[1]++;// Carry from low to high bits[1] += len >> 29; //Bytes already in shsInfo->data t = (t >> 3) & 0x3f; // Handle any leading odd-sized chunks if (t) { unsigned char *p = (unsigned char *) in + t; t = 64 - t; if (len < t) { md5_memcpy(p, source, len); return; } md5_memcpy(p, source, t); //byteReverse(in, 16); transform(buf, (unsigned long *) in); source += t; len -= t; } // Process data in 64-byte chunks while (len >= 64) { md5_memcpy(in, source, 64); //byteReverse(in, 16); transform(buf, (unsigned long *) in); source += 64; len -= 64; } // Handle any remaining bytes of data. md5_memcpy(in, source, len); } /* * Update context to reflect the concatenation of another string */ void Md5::append(const DOMString &str) { append((unsigned char *)str.c_str(), str.size()); } /* * Final wrapup - pad to 64-byte boundary with the bit pattern * 1 0* (64-bit count of bits processed, MSB-first) */ void Md5::finish(unsigned char *digest) { // Compute number of bytes mod 64 unsigned int count = (bits[0] >> 3) & 0x3F; // Set the first char of padding to 0x80. // This is safe since there is always at least one byte free unsigned char *p = in + count; *p++ = 0x80; // Bytes of padding needed to make 64 bytes count = 64 - 1 - count; // Pad out to 56 mod 64 if (count < 8) { // Two lots of padding: Pad the first block to 64 bytes md5_memset(p, 0, count); //byteReverse(in, 16); transform(buf, (unsigned long *) in); // Now fill the next block with 56 bytes md5_memset(in, 0, 56); } else { // Pad block to 56 bytes md5_memset(p, 0, count - 8); } //byteReverse(in, 14); // Append length in bits and transform ((unsigned long *) in)[14] = bits[0]; ((unsigned long *) in)[15] = bits[1]; transform(buf, (unsigned long *) in); //byteReverse((unsigned char *) buf, 4); md5_memcpy(digest, buf, 16); init(); // Security! ;-) } static char *md5hex = "0123456789abcdef"; DOMString Md5::finishHex() { unsigned char hashout[16]; finish(hashout); DOMString ret; for (int i=0 ; i<16 ; i++) { unsigned char ch = hashout[i]; ret.push_back(md5hex[ (ch>>4) & 15 ]); ret.push_back(md5hex[ ch & 15 ]); } return ret; } //# The four core functions - F1 is optimized somewhat // #define F1(x, y, z) (x & y | ~x & z) #define F1(x, y, z) (z ^ (x & (y ^ z))) #define F2(x, y, z) F1(z, x, y) #define F3(x, y, z) (x ^ y ^ z) #define F4(x, y, z) (y ^ (x | ~z)) // ## This is the central step in the MD5 algorithm. #define MD5STEP(f, w, x, y, z, data, s) \ ( w += f(x, y, z) + data, w = w<>(32-s), w += x ) /* * The core of the MD5 algorithm, this alters an existing MD5 hash to * reflect the addition of 16 longwords of new data. MD5Update blocks * the data and converts bytes into longwords for this routine. * @parm buf points to an array of 4 unsigned longs * @parm in points to an array of 16 unsigned longs */ void Md5::transform(unsigned long *buf, unsigned long *in) { unsigned long a = buf[0]; unsigned long b = buf[1]; unsigned long c = buf[2]; unsigned long d = buf[3]; MD5STEP(F1, a, b, c, d, in[ 0] + 0xd76aa478, 7); MD5STEP(F1, d, a, b, c, in[ 1] + 0xe8c7b756, 12); MD5STEP(F1, c, d, a, b, in[ 2] + 0x242070db, 17); MD5STEP(F1, b, c, d, a, in[ 3] + 0xc1bdceee, 22); MD5STEP(F1, a, b, c, d, in[ 4] + 0xf57c0faf, 7); MD5STEP(F1, d, a, b, c, in[ 5] + 0x4787c62a, 12); MD5STEP(F1, c, d, a, b, in[ 6] + 0xa8304613, 17); MD5STEP(F1, b, c, d, a, in[ 7] + 0xfd469501, 22); MD5STEP(F1, a, b, c, d, in[ 8] + 0x698098d8, 7); MD5STEP(F1, d, a, b, c, in[ 9] + 0x8b44f7af, 12); MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); MD5STEP(F2, a, b, c, d, in[ 1] + 0xf61e2562, 5); MD5STEP(F2, d, a, b, c, in[ 6] + 0xc040b340, 9); MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); MD5STEP(F2, b, c, d, a, in[ 0] + 0xe9b6c7aa, 20); MD5STEP(F2, a, b, c, d, in[ 5] + 0xd62f105d, 5); MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); MD5STEP(F2, b, c, d, a, in[ 4] + 0xe7d3fbc8, 20); MD5STEP(F2, a, b, c, d, in[ 9] + 0x21e1cde6, 5); MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); MD5STEP(F2, c, d, a, b, in[ 3] + 0xf4d50d87, 14); MD5STEP(F2, b, c, d, a, in[ 8] + 0x455a14ed, 20); MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); MD5STEP(F2, d, a, b, c, in[ 2] + 0xfcefa3f8, 9); MD5STEP(F2, c, d, a, b, in[ 7] + 0x676f02d9, 14); MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); MD5STEP(F3, a, b, c, d, in[ 5] + 0xfffa3942, 4); MD5STEP(F3, d, a, b, c, in[ 8] + 0x8771f681, 11); MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); MD5STEP(F3, a, b, c, d, in[ 1] + 0xa4beea44, 4); MD5STEP(F3, d, a, b, c, in[ 4] + 0x4bdecfa9, 11); MD5STEP(F3, c, d, a, b, in[ 7] + 0xf6bb4b60, 16); MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); MD5STEP(F3, d, a, b, c, in[ 0] + 0xeaa127fa, 11); MD5STEP(F3, c, d, a, b, in[ 3] + 0xd4ef3085, 16); MD5STEP(F3, b, c, d, a, in[ 6] + 0x04881d05, 23); MD5STEP(F3, a, b, c, d, in[ 9] + 0xd9d4d039, 4); MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); MD5STEP(F3, b, c, d, a, in[ 2] + 0xc4ac5665, 23); MD5STEP(F4, a, b, c, d, in[ 0] + 0xf4292244, 6); MD5STEP(F4, d, a, b, c, in[ 7] + 0x432aff97, 10); MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); MD5STEP(F4, b, c, d, a, in[ 5] + 0xfc93a039, 21); MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); MD5STEP(F4, d, a, b, c, in[ 3] + 0x8f0ccc92, 10); MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); MD5STEP(F4, b, c, d, a, in[ 1] + 0x85845dd1, 21); MD5STEP(F4, a, b, c, d, in[ 8] + 0x6fa87e4f, 6); MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); MD5STEP(F4, c, d, a, b, in[ 6] + 0xa3014314, 15); MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); MD5STEP(F4, a, b, c, d, in[ 4] + 0xf7537e82, 6); MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); MD5STEP(F4, c, d, a, b, in[ 2] + 0x2ad7d2bb, 15); MD5STEP(F4, b, c, d, a, in[ 9] + 0xeb86d391, 21); buf[0] += a; buf[1] += b; buf[2] += c; buf[3] += d; } //######################################################################## //######################################################################## //### T H R E A D //######################################################################## //######################################################################## #ifdef __WIN32__ static DWORD WINAPI WinThreadFunction(LPVOID context) { Thread *thread = (Thread *)context; thread->execute(); return 0; } void Thread::start() { DWORD dwThreadId; HANDLE hThread = CreateThread(NULL, 0, WinThreadFunction, (LPVOID)this, 0, &dwThreadId); //Make sure the thread is started before 'this' is deallocated while (!started) sleep(10); CloseHandle(hThread); } void Thread::sleep(unsigned long millis) { Sleep(millis); } #else /* UNIX */ void *PthreadThreadFunction(void *context) { Thread *thread = (Thread *)context; thread->execute(); return NULL; } void Thread::start() { pthread_t thread; int ret = pthread_create(&thread, NULL, PthreadThreadFunction, (void *)this); if (ret != 0) printf("Thread::start: thread creation failed: %s\n", strerror(ret)); //Make sure the thread is started before 'this' is deallocated while (!started) sleep(10); } void Thread::sleep(unsigned long millis) { timespec requested; requested.tv_sec = millis / 1000; requested.tv_nsec = (millis % 1000 ) * 1000000L; nanosleep(&requested, NULL); } #endif //######################################################################## //######################################################################## //### S O C K E T //######################################################################## //######################################################################## //######################################################################### //# U T I L I T Y //######################################################################### static void mybzero(void *s, size_t n) { unsigned char *p = (unsigned char *)s; while (n > 0) { *p++ = (unsigned char)0; n--; } } static void mybcopy(void *src, void *dest, size_t n) { unsigned char *p = (unsigned char *)dest; unsigned char *q = (unsigned char *)src; while (n > 0) { *p++ = *q++; n--; } } //######################################################################### //# T C P C O N N E C T I O N //######################################################################### TcpSocket::TcpSocket() { init(); } TcpSocket::TcpSocket(const std::string &hostnameArg, int port) { init(); hostname = hostnameArg; portno = port; } #ifdef HAVE_SSL static void cryptoLockCallback(int mode, int type, const char *file, int line) { //printf("########### LOCK\n"); static int modes[CRYPTO_NUM_LOCKS]; /* = {0, 0, ... } */ const char *errstr = NULL; int rw = mode & (CRYPTO_READ|CRYPTO_WRITE); if (!((rw == CRYPTO_READ) || (rw == CRYPTO_WRITE))) { errstr = "invalid mode"; goto err; } if (type < 0 || type >= CRYPTO_NUM_LOCKS) { errstr = "type out of bounds"; goto err; } if (mode & CRYPTO_LOCK) { if (modes[type]) { errstr = "already locked"; /* must not happen in a single-threaded program * (would deadlock) */ goto err; } modes[type] = rw; } else if (mode & CRYPTO_UNLOCK) { if (!modes[type]) { errstr = "not locked"; goto err; } if (modes[type] != rw) { errstr = (rw == CRYPTO_READ) ? "CRYPTO_r_unlock on write lock" : "CRYPTO_w_unlock on read lock"; } modes[type] = 0; } else { errstr = "invalid mode"; goto err; } err: if (errstr) { /* we cannot use bio_err here */ fprintf(stderr, "openssl (lock_dbg_cb): %s (mode=%d, type=%d) at %s:%d\n", errstr, mode, type, file, line); } } static unsigned long cryptoIdCallback() { #ifdef __WIN32__ unsigned long ret = (unsigned long) GetCurrentThreadId(); #else unsigned long ret = (unsigned long) pthread_self(); #endif return ret; } #endif TcpSocket::TcpSocket(const TcpSocket &other) { init(); sock = other.sock; hostname = other.hostname; portno = other.portno; } static bool tcp_socket_inited = false; void TcpSocket::init() { if (!tcp_socket_inited) { #ifdef __WIN32__ WORD wVersionRequested = MAKEWORD( 2, 2 ); WSADATA wsaData; WSAStartup( wVersionRequested, &wsaData ); #endif #ifdef HAVE_SSL sslStream = NULL; sslContext = NULL; CRYPTO_set_locking_callback(cryptoLockCallback); CRYPTO_set_id_callback(cryptoIdCallback); SSL_library_init(); SSL_load_error_strings(); #endif tcp_socket_inited = true; } sock = -1; connected = false; hostname = ""; portno = -1; sslEnabled = false; receiveTimeout = 0; } TcpSocket::~TcpSocket() { disconnect(); } bool TcpSocket::isConnected() { if (!connected || sock < 0) return false; return true; } bool TcpSocket::getHaveSSL() { #ifdef HAVE_SSL return true; #else return false; #endif } void TcpSocket::enableSSL(bool val) { sslEnabled = val; } bool TcpSocket::getEnableSSL() { return sslEnabled; } bool TcpSocket::connect(const std::string &hostnameArg, int portnoArg) { hostname = hostnameArg; portno = portnoArg; return connect(); } #ifdef HAVE_SSL /* static int password_cb(char *buf, int bufLen, int rwflag, void *userdata) { char *password = "password"; if (bufLen < (int)(strlen(password)+1)) return 0; strcpy(buf,password); int ret = strlen(password); return ret; } static void infoCallback(const SSL *ssl, int where, int ret) { switch (where) { case SSL_CB_ALERT: { printf("## %d SSL ALERT: %s\n", where, SSL_alert_desc_string_long(ret)); break; } default: { printf("## %d SSL: %s\n", where, SSL_state_string_long(ssl)); break; } } } */ #endif bool TcpSocket::startTls() { #ifndef HAVE_SSL fprintf(stderr, "SSL starttls() error: client not compiled with SSL enabled\n"); return false; #else /*HAVE_SSL*/ sslStream = NULL; sslContext = NULL; //SSL_METHOD *meth = SSLv23_method(); //SSL_METHOD *meth = SSLv3_client_method(); SSL_METHOD *meth = TLSv1_client_method(); sslContext = SSL_CTX_new(meth); //SSL_CTX_set_info_callback(sslContext, infoCallback); /** * For now, let's accept all connections. Ignore this * block of code * char *keyFile = "client.pem"; char *caList = "root.pem"; //# Load our keys and certificates if (!(SSL_CTX_use_certificate_chain_file(sslContext, keyFile))) { fprintf(stderr, "Can't read certificate file\n"); disconnect(); return false; } SSL_CTX_set_default_passwd_cb(sslContext, password_cb); if (!(SSL_CTX_use_PrivateKey_file(sslContext, keyFile, SSL_FILETYPE_PEM))) { fprintf(stderr, "Can't read key file\n"); disconnect(); return false; } //## Load the CAs we trust if (!(SSL_CTX_load_verify_locations(sslContext, caList, 0))) { fprintf(stderr, "Can't read CA list\n"); disconnect(); return false; } */ /* Connect the SSL socket */ sslStream = SSL_new(sslContext); SSL_set_fd(sslStream, sock); int ret = SSL_connect(sslStream); if (ret == 0) { fprintf(stderr, "SSL connection not successful\n"); disconnect(); return false; } else if (ret < 0) { int err = SSL_get_error(sslStream, ret); fprintf(stderr, "SSL connect error %d\n", err); disconnect(); return false; } sslEnabled = true; return true; #endif /* HAVE_SSL */ } bool TcpSocket::connect() { if (hostname.size()<1) { fprintf(stderr, "open: null hostname\n"); return false; } if (portno<1) { fprintf(stderr, "open: bad port number\n"); return false; } sock = socket(PF_INET, SOCK_STREAM, 0); if (sock < 0) { fprintf(stderr, "open: error creating socket\n"); return false; } char *c_hostname = (char *)hostname.c_str(); struct hostent *server = gethostbyname(c_hostname); if (!server) { fprintf(stderr, "open: could not locate host '%s'\n", c_hostname); return false; } struct sockaddr_in serv_addr; mybzero((char *) &serv_addr, sizeof(serv_addr)); serv_addr.sin_family = AF_INET; mybcopy((char *)server->h_addr, (char *)&serv_addr.sin_addr.s_addr, server->h_length); serv_addr.sin_port = htons(portno); int ret = ::connect(sock, (const sockaddr *)&serv_addr, sizeof(serv_addr)); if (ret < 0) { fprintf(stderr, "open: could not connect to host '%s'\n", c_hostname); return false; } if (sslEnabled) { if (!startTls()) return false; } connected = true; return true; } bool TcpSocket::disconnect() { bool ret = true; connected = false; #ifdef HAVE_SSL if (sslEnabled) { if (sslStream) { int r = SSL_shutdown(sslStream); switch(r) { case 1: break; /* Success */ case 0: case -1: default: //printf("Shutdown failed"); ret = false; } SSL_free(sslStream); } if (sslContext) SSL_CTX_free(sslContext); } sslStream = NULL; sslContext = NULL; #endif /*HAVE_SSL*/ #ifdef __WIN32__ closesocket(sock); #else ::close(sock); #endif sock = -1; sslEnabled = false; return ret; } bool TcpSocket::setReceiveTimeout(unsigned long millis) { receiveTimeout = millis; return true; } /** * For normal sockets, return the number of bytes waiting to be received. * For SSL, just return >0 when something is ready to be read. */ long TcpSocket::available() { if (!isConnected()) return -1; long count = 0; #ifdef __WIN32__ if (ioctlsocket(sock, FIONREAD, (unsigned long *)&count) != 0) return -1; #else if (ioctl(sock, FIONREAD, &count) != 0) return -1; #endif if (count<=0 && sslEnabled) { #ifdef HAVE_SSL return SSL_pending(sslStream); #endif } return count; } bool TcpSocket::write(int ch) { if (!isConnected()) { fprintf(stderr, "write: socket closed\n"); return false; } unsigned char c = (unsigned char)ch; if (sslEnabled) { #ifdef HAVE_SSL int r = SSL_write(sslStream, &c, 1); if (r<=0) { switch(SSL_get_error(sslStream, r)) { default: fprintf(stderr, "SSL write problem"); return -1; } } #endif } else { if (send(sock, (const char *)&c, 1, 0) < 0) //if (send(sock, &c, 1, 0) < 0) { fprintf(stderr, "write: could not send data\n"); return false; } } return true; } bool TcpSocket::write(char *str) { if (!isConnected()) { fprintf(stderr, "write(str): socket closed\n"); return false; } int len = strlen(str); if (sslEnabled) { #ifdef HAVE_SSL int r = SSL_write(sslStream, (unsigned char *)str, len); if (r<=0) { switch(SSL_get_error(sslStream, r)) { default: fprintf(stderr, "SSL write problem"); return -1; } } #endif } else { if (send(sock, str, len, 0) < 0) //if (send(sock, &c, 1, 0) < 0) { fprintf(stderr, "write: could not send data\n"); return false; } } return true; } bool TcpSocket::write(const std::string &str) { return write((char *)str.c_str()); } int TcpSocket::read() { if (!isConnected()) return -1; //We'll use this loop for timeouts, so that SSL and plain sockets //will behave the same way if (receiveTimeout > 0) { unsigned long tim = 0; while (true) { int avail = available(); if (avail > 0) break; if (tim >= receiveTimeout) return -2; Thread::sleep(20); tim += 20; } } //check again if (!isConnected()) return -1; unsigned char ch; if (sslEnabled) { #ifdef HAVE_SSL if (!sslStream) return -1; int r = SSL_read(sslStream, &ch, 1); unsigned long err = SSL_get_error(sslStream, r); switch (err) { case SSL_ERROR_NONE: break; case SSL_ERROR_ZERO_RETURN: return -1; case SSL_ERROR_SYSCALL: fprintf(stderr, "SSL read problem(syscall) %s\n", ERR_error_string(ERR_get_error(), NULL)); return -1; default: fprintf(stderr, "SSL read problem %s\n", ERR_error_string(ERR_get_error(), NULL)); return -1; } #endif } else { if (recv(sock, (char *)&ch, 1, 0) <= 0) { fprintf(stderr, "read: could not receive data\n"); disconnect(); return -1; } } return (int)ch; } std::string TcpSocket::readLine() { std::string ret; while (isConnected()) { int ch = read(); if (ch<0) return ret; if (ch=='\r' || ch=='\n') return ret; ret.push_back((char)ch); } return ret; } } //namespace Pedro //######################################################################## //# E N D O F F I L E //########################################################################