--- /dev/null
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+#include <poll.h>
+#include <sys/mman.h>
+
+#include "libwebsockets.h"
+
+void md5(const unsigned char *input, int ilen, unsigned char output[16]);
+
+void dostuff(struct libwebsocket *wsi, int sock);
+
+const struct lws_tokens lws_tokens[WSI_TOKEN_COUNT] = {
+ { "GET ", 4 },
+ { "Host:", 5 },
+ { "Connection:", 11 },
+ { "Sec-WebSocket-Key1:", 19 },
+ { "Sec-WebSocket-Key2:", 19 },
+ { "Sec-WebSocket-Protocol:", 23 },
+ { "Upgrade:", 8 },
+ { "Origin:", 7 },
+ { "\x0d\x0a", 2 },
+};
+
+int libwebsocket_init(struct libwebsocket *wsi, int port)
+{
+ int n;
+ int sockfd, newsockfd;
+ unsigned int clilen;
+ struct sockaddr_in serv_addr, cli_addr;
+ int pid;
+
+ wsi->state = WSI_STATE_CLOSED;
+ wsi->name_buffer_pos = 0;
+ wsi->response = NULL;
+
+ for (n = 0; n < WSI_TOKEN_COUNT; n++) {
+ wsi->utf8_token[n].token = NULL;
+ wsi->utf8_token[n].token_len = 0;
+ }
+
+ /* fork off a master server for this websocket server */
+
+ n = fork();
+ if (n < 0) {
+ fprintf(stderr, "Failed on forking server thread: %d\n", n);
+ exit(1);
+ }
+
+ /* we are done as far as the caller is concerned */
+
+ if (n)
+ return 0;
+
+ /* sit there listening for connects, accept and spawn session servers */
+
+ sockfd = socket(AF_INET, SOCK_STREAM, 0);
+ if (sockfd < 0)
+ fprintf(stderr, "ERROR opening socket");
+ bzero((char *) &serv_addr, sizeof(serv_addr));
+
+ serv_addr.sin_family = AF_INET;
+ serv_addr.sin_addr.s_addr = INADDR_ANY;
+ serv_addr.sin_port = htons(port);
+ if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0)
+ fprintf(stderr, "ERROR on binding");
+
+ listen(sockfd, 5);
+
+ while (1) {
+ clilen = sizeof(cli_addr);
+
+ newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
+ if (newsockfd < 0)
+ fprintf(stderr, "ERROR on accept");
+
+ /* fork off a new server instance */
+
+ pid = fork();
+ if (pid < 0)
+ fprintf(stderr, "ERROR on fork");
+ if (!pid) {
+ close(sockfd);
+
+ /* sit in dostuff() until session socket closed */
+
+ dostuff(wsi, newsockfd);
+ exit(0);
+ } else
+ close(newsockfd);
+ }
+}
+
+void libwebsocket_close(struct libwebsocket *wsi)
+{
+ int n;
+
+ wsi->state = WSI_STATE_DEAD_SOCKET;
+
+ if (wsi->websocket_closed_callback)
+ wsi->websocket_closed_callback(wsi);
+
+ for (n = 0; n < WSI_TOKEN_COUNT; n++)
+ if (wsi->utf8_token[n].token)
+ free(wsi->utf8_token[n].token);
+
+ if (wsi->response)
+ free(wsi->response);
+}
+
+
+static int libwebsocket_parse(struct libwebsocket *wsi, unsigned char c)
+{
+ int n;
+
+ switch (wsi->parser_state) {
+ case WSI_TOKEN_GET_URI:
+ case WSI_TOKEN_HOST:
+ case WSI_TOKEN_CONNECTION:
+ case WSI_TOKEN_KEY1:
+ case WSI_TOKEN_KEY2:
+ case WSI_TOKEN_PROTOCOL:
+ case WSI_TOKEN_UPGRADE:
+ case WSI_TOKEN_ORIGIN:
+ case WSI_TOKEN_CHALLENGE:
+
+// fprintf(stderr, "WSI_TOKEN_(body %d) '%c'\n", wsi->parser_state, c);
+
+ /* collect into malloc'd buffers */
+ /* optional space swallow */
+ if (!wsi->utf8_token[wsi->parser_state].token_len && c == ' ')
+ break;
+
+ /* special case space terminator for get-uri */
+ if (wsi->parser_state == WSI_TOKEN_GET_URI && c == ' ') {
+ wsi->utf8_token[wsi->parser_state].token[
+ wsi->utf8_token[wsi->parser_state].token_len] = '\0';
+ wsi->parser_state = WSI_TOKEN_SKIPPING;
+ break;
+ }
+
+ /* allocate appropriate memory */
+ if (wsi->utf8_token[wsi->parser_state].token_len == wsi->current_alloc_len - 1) {
+ /* need to extend */
+ wsi->current_alloc_len += LWS_ADDITIONAL_HDR_ALLOC;
+ if (wsi->current_alloc_len >= LWS_MAX_HEADER_LEN) {
+ /* it's waaay to much payload, fail it */
+ strcpy(wsi->utf8_token[wsi->parser_state].token,
+ "!!! Length exceeded maximum supported !!!");
+ wsi->parser_state = WSI_TOKEN_SKIPPING;
+ break;
+ }
+ wsi->utf8_token[wsi->parser_state].token =
+ realloc(wsi->utf8_token[wsi->parser_state].token,
+ wsi->current_alloc_len);
+ }
+
+ /* bail at EOL */
+ if (wsi->parser_state != WSI_TOKEN_CHALLENGE && c == '\x0d') {
+ wsi->utf8_token[wsi->parser_state].token[
+ wsi->utf8_token[wsi->parser_state].token_len] = '\0';
+ wsi->parser_state = WSI_TOKEN_SKIPPING_SAW_CR;
+ break;
+ }
+
+ wsi->utf8_token[wsi->parser_state].token[
+ wsi->utf8_token[wsi->parser_state].token_len++] = c;
+
+ /* special payload limiting */
+ if (wsi->parser_state == WSI_TOKEN_CHALLENGE)
+ if (wsi->utf8_token[wsi->parser_state].token_len == 8) {
+// fprintf(stderr, "Setting WSI_PARSING_COMPLETE\n");
+ wsi->parser_state = WSI_PARSING_COMPLETE;
+ break;
+ }
+
+ break;
+
+ /* collecting and checking a name part */
+ case WSI_TOKEN_NAME_PART:
+// fprintf(stderr, "WSI_TOKEN_NAME_PART '%c'\n", c);
+
+ if (wsi->name_buffer_pos == sizeof(wsi->name_buffer) - 1) {
+ /* name bigger than we can handle, skip until next */
+ wsi->parser_state = WSI_TOKEN_SKIPPING;
+ break;
+ }
+ wsi->name_buffer[wsi->name_buffer_pos++] = c;
+ wsi->name_buffer[wsi->name_buffer_pos] = '\0';
+
+ for (n = 0; n < WSI_TOKEN_COUNT; n++) {
+ if (wsi->name_buffer_pos != lws_tokens[n].token_len)
+ continue;
+ if (strcmp(lws_tokens[n].token, wsi->name_buffer))
+ continue;
+ wsi->parser_state = WSI_TOKEN_GET_URI + n;
+ wsi->current_alloc_len = LWS_INITIAL_HDR_ALLOC;
+ wsi->utf8_token[wsi->parser_state].token =
+ malloc(wsi->current_alloc_len);
+ wsi->utf8_token[wsi->parser_state].token_len = 0;
+ n = WSI_TOKEN_COUNT;
+ }
+ if (wsi->parser_state != WSI_TOKEN_NAME_PART)
+ break;
+ break;
+
+ /* skipping arg part of a name we didn't recognize */
+ case WSI_TOKEN_SKIPPING:
+// fprintf(stderr, "WSI_TOKEN_SKIPPING '%c'\n", c);
+ if (c == '\x0d')
+ wsi->parser_state = WSI_TOKEN_SKIPPING_SAW_CR;
+ break;
+ case WSI_TOKEN_SKIPPING_SAW_CR:
+// fprintf(stderr, "WSI_TOKEN_SKIPPING_SAW_CR '%c'\n", c);
+ if (c == '\x0a')
+ wsi->parser_state = WSI_TOKEN_NAME_PART;
+ else
+ wsi->parser_state = WSI_TOKEN_SKIPPING;
+ wsi->name_buffer_pos = 0;
+ break;
+ /* we're done, ignore anything else */
+ case WSI_PARSING_COMPLETE:
+// fprintf(stderr, "WSI_PARSING_COMPLETE '%c'\n", c);
+ break;
+
+ default: /* keep gcc happy */
+ break;
+ }
+
+ return 0;
+}
+
+static int interpret_key(const char *key, unsigned int *result)
+{
+ char digits[20];
+ int digit_pos = 0;
+ const char *p = key;
+ int spaces = 0;
+
+ while (*p) {
+ if (isdigit(*p)) {
+ if (digit_pos == sizeof(digits) - 1)
+ return -1;
+ digits[digit_pos++] = *p;
+ }
+ p++;
+ }
+ digits[digit_pos] = '\0';
+ if (!digit_pos)
+ return -2;
+
+ while (*key) {
+ if (*key == ' ')
+ spaces++;
+ key++;
+ }
+
+ if (!spaces)
+ return -3;
+
+ *result = atol(digits) / spaces;
+
+ return 0;
+}
+
+
+/*
+ * We have to take care about parsing because the headers may be split
+ * into multiple fragments. They may contain unknown headers with arbitrary
+ * argument lengths.
+ */
+
+int libwebsocket_read(struct libwebsocket *wsi, unsigned char * buf, size_t len)
+{
+ size_t n;
+ char *p;
+ unsigned int key1, key2;
+ unsigned char sum[16];
+
+ switch (wsi->state) {
+ case WSI_STATE_CLOSED:
+ wsi->state = WSI_STATE_HANDSHAKE_RX;
+ wsi->parser_state = WSI_TOKEN_NAME_PART;
+ case WSI_STATE_HANDSHAKE_RX:
+
+ fprintf(stderr, "issuing %ld bytes to parser\n", len);
+
+
+ fwrite(buf, 1, len, stderr);
+ for (n = 0; n< len; n++)
+ libwebsocket_parse(wsi, *buf++);
+
+ if (wsi->parser_state != WSI_PARSING_COMPLETE)
+ break;
+
+ fprintf(stderr, "Preparing return packet\n");
+
+
+ /* Confirm we have all the necessary pieces */
+
+ if (
+ !wsi->utf8_token[WSI_TOKEN_UPGRADE].token_len ||
+ !wsi->utf8_token[WSI_TOKEN_CONNECTION].token_len ||
+ !wsi->utf8_token[WSI_TOKEN_ORIGIN].token_len ||
+ !wsi->utf8_token[WSI_TOKEN_HOST].token_len ||
+ !wsi->utf8_token[WSI_TOKEN_CHALLENGE].token_len ||
+ !wsi->utf8_token[WSI_TOKEN_KEY1].token_len ||
+ !wsi->utf8_token[WSI_TOKEN_KEY2].token_len) {
+
+ /* completed header processing, but missing some bits */
+ goto bail;
+ }
+
+ /* create the response packet */
+
+ wsi->response = malloc(256 +
+ wsi->utf8_token[WSI_TOKEN_UPGRADE].token_len +
+ wsi->utf8_token[WSI_TOKEN_CONNECTION].token_len +
+ wsi->utf8_token[WSI_TOKEN_HOST].token_len +
+ wsi->utf8_token[WSI_TOKEN_ORIGIN].token_len +
+ wsi->utf8_token[WSI_TOKEN_GET_URI].token_len +
+ wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len);
+
+
+ fprintf(stderr, "'%s;\n", wsi->utf8_token[WSI_TOKEN_HOST].token);
+
+ p = wsi->response;
+ strcpy(p, "HTTP/1.1 101 WebSocket Protocol Handshake\x0d\x0aUpgrade: WebSocket\x0d\x0a");
+ p += strlen("HTTP/1.1 101 WebSocket Protocol Handshake\x0d\x0aUpgrade: WebSocket\x0d\x0a");
+ strcpy(p, "Connection: Upgrade\x0d\x0aSec-WebSocket-Origin: ");
+ p += strlen("Connection: Upgrade\x0d\x0aSec-WebSocket-Origin: ");
+ strcpy(p, wsi->utf8_token[WSI_TOKEN_ORIGIN].token);
+ p += wsi->utf8_token[WSI_TOKEN_ORIGIN].token_len;
+ strcpy(p, "\x0d\x0aSec-WebSocket-Location: ws://");
+ p += strlen("\x0d\x0aSec-WebSocket-Location: ws://");
+ strcpy(p, wsi->utf8_token[WSI_TOKEN_HOST].token);
+ p += wsi->utf8_token[WSI_TOKEN_HOST].token_len;
+ strcpy(p, wsi->utf8_token[WSI_TOKEN_GET_URI].token);
+ p += wsi->utf8_token[WSI_TOKEN_GET_URI].token_len;
+ strcpy(p, "\x0d\x0aSec-WebSocket-Protocol: ");
+ p += strlen("\x0d\x0aSec-WebSocket-Protocol: ");
+ if (wsi->utf8_token[WSI_TOKEN_PROTOCOL].token) {
+ strcpy(p, wsi->utf8_token[WSI_TOKEN_PROTOCOL].token);
+ p += wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len;
+ }
+ strcpy(p, "\x0d\x0a\x0d\x0a");
+ p += strlen("\x0d\x0a\x0d\x0a");
+
+ if (interpret_key(wsi->utf8_token[WSI_TOKEN_KEY1].token, &key1))
+ goto bail;
+
+ if (interpret_key(wsi->utf8_token[WSI_TOKEN_KEY2].token, &key2))
+ goto bail;
+
+ sum[0] = key1 >> 24;
+ sum[1] = key1 >> 16;
+ sum[2] = key1 >> 8;
+ sum[3] = key1;
+ sum[4] = key2 >> 24;
+ sum[5] = key2 >> 16;
+ sum[6] = key2 >> 8;
+ sum[7] = key2;
+ memcpy(&sum[8], wsi->utf8_token[WSI_TOKEN_CHALLENGE].token, 8);
+
+ md5(sum, 16, (unsigned char *)p);
+ p += 16;
+
+ wsi->response_length = p - wsi->response;
+
+ wsi->state = WSI_STATE_ISSUE_HANDSHAKE;
+
+ if (wsi->websocket_established_callback)
+ wsi->websocket_established_callback(wsi);
+ break;
+
+ case WSI_STATE_ESTABLISHED:
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+
+bail:
+ libwebsocket_close(wsi);
+ return -1;
+}
+
+
+void dostuff(struct libwebsocket *wsi, int sock)
+{
+ int n;
+ unsigned char buf[256];
+ struct pollfd fds;
+
+ wsi->sock = sock;
+
+ fds.fd = sock;
+ fds.events = POLLIN | POLLOUT;
+
+ while (1) {
+
+ n = poll(&fds, 1, 10);
+ if (n < 0) {
+ fprintf(stderr, "Socket dead (poll = %d)\n", n);
+ return;
+ }
+
+ if (fds.revents & (POLLERR | POLLHUP)) {
+ fprintf(stderr, "Socket dead\n");
+ return;
+ }
+
+ if (wsi->state == WSI_STATE_DEAD_SOCKET)
+ return;
+
+
+ if (fds.revents & POLLIN) {
+
+// fprintf(stderr, "POLLIN\n");
+
+ n = read(sock, buf, sizeof(buf));
+ if (n < 0) {
+ fprintf(stderr, "Socket read returned %d\n", n);
+ continue;
+ }
+ if (n)
+ libwebsocket_read(wsi, buf, n);
+ }
+
+ if (wsi->state == WSI_STATE_ISSUE_HANDSHAKE) {
+
+ fprintf(stderr, "issuing response packet %d len\n", wsi->response_length);
+
+ fwrite(wsi->response, 1, wsi->response_length, stderr);
+
+ n = write(sock, wsi->response, wsi->response_length);
+ if (n < 0) {
+ fprintf(stderr, "ERROR writing to socket");
+ exit(1);
+ }
+ wsi->state = WSI_STATE_ESTABLISHED;
+ continue;
+ }
+
+ if (wsi->websocket_send_callback)
+ wsi->websocket_send_callback(wsi);
+ }
+}
+
--- /dev/null
+/*
+ * Originally from Polarssl here
+ * http://polarssl.org/show_source?file=md5
+ * under GPL2 or later
+ * truncated to remove hmac support
+ */
+
+
+#include <string.h>
+#include <stdio.h>
+
+
+typedef struct
+{
+ unsigned long total[2]; /*!< number of bytes processed */
+ unsigned long state[4]; /*!< intermediate digest state */
+ unsigned char buffer[64]; /*!< data block being processed */
+}
+md5_context;
+
+
+/**
+ * \brief MD5 context setup
+ *
+ * \param ctx context to be initialized
+ */
+void md5_starts( md5_context *ctx );
+
+/**
+ * \brief MD5 process buffer
+ *
+ * \param ctx MD5 context
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ */
+void md5_update( md5_context *ctx, const unsigned char *input, int ilen );
+
+/**
+ * \brief MD5 final digest
+ *
+ * \param ctx MD5 context
+ * \param output MD5 checksum result
+ */
+void md5_finish( md5_context *ctx, unsigned char output[16] );
+
+/**
+ * \brief Output = MD5( input buffer )
+ *
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output MD5 checksum result
+ */
+void md5( const unsigned char *input, int ilen, unsigned char output[16] );
+
+/**
+ * \brief Output = MD5( file contents )
+ *
+ * \param path input file name
+ * \param output MD5 checksum result
+ *
+ * \return 0 if successful, 1 if fopen failed,
+ * or 2 if fread failed
+ */
+int md5_file( const char *path, unsigned char output[16] );
+
+
+
+/*
+ * 32-bit integer manipulation macros (little endian)
+ */
+#ifndef GET_ULONG_LE
+#define GET_ULONG_LE(n,b,i) \
+{ \
+ (n) = ( (unsigned long) (b)[(i) ] ) \
+ | ( (unsigned long) (b)[(i) + 1] << 8 ) \
+ | ( (unsigned long) (b)[(i) + 2] << 16 ) \
+ | ( (unsigned long) (b)[(i) + 3] << 24 ); \
+}
+#endif
+
+#ifndef PUT_ULONG_LE
+#define PUT_ULONG_LE(n,b,i) \
+{ \
+ (b)[(i) ] = (unsigned char) ( (n) ); \
+ (b)[(i) + 1] = (unsigned char) ( (n) >> 8 ); \
+ (b)[(i) + 2] = (unsigned char) ( (n) >> 16 ); \
+ (b)[(i) + 3] = (unsigned char) ( (n) >> 24 ); \
+}
+#endif
+
+/*
+ * MD5 context setup
+ */
+void md5_starts( md5_context *ctx )
+{
+ ctx->total[0] = 0;
+ ctx->total[1] = 0;
+
+ ctx->state[0] = 0x67452301;
+ ctx->state[1] = 0xEFCDAB89;
+ ctx->state[2] = 0x98BADCFE;
+ ctx->state[3] = 0x10325476;
+}
+
+static void md5_process( md5_context *ctx, const unsigned char data[64] )
+{
+ unsigned long X[16], A, B, C, D;
+
+ GET_ULONG_LE( X[ 0], data, 0 );
+ GET_ULONG_LE( X[ 1], data, 4 );
+ GET_ULONG_LE( X[ 2], data, 8 );
+ GET_ULONG_LE( X[ 3], data, 12 );
+ GET_ULONG_LE( X[ 4], data, 16 );
+ GET_ULONG_LE( X[ 5], data, 20 );
+ GET_ULONG_LE( X[ 6], data, 24 );
+ GET_ULONG_LE( X[ 7], data, 28 );
+ GET_ULONG_LE( X[ 8], data, 32 );
+ GET_ULONG_LE( X[ 9], data, 36 );
+ GET_ULONG_LE( X[10], data, 40 );
+ GET_ULONG_LE( X[11], data, 44 );
+ GET_ULONG_LE( X[12], data, 48 );
+ GET_ULONG_LE( X[13], data, 52 );
+ GET_ULONG_LE( X[14], data, 56 );
+ GET_ULONG_LE( X[15], data, 60 );
+
+#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
+
+#define P(a,b,c,d,k,s,t) \
+{ \
+ a += F(b,c,d) + X[k] + t; a = S(a,s) + b; \
+}
+
+ A = ctx->state[0];
+ B = ctx->state[1];
+ C = ctx->state[2];
+ D = ctx->state[3];
+
+#define F(x,y,z) (z ^ (x & (y ^ z)))
+
+ P( A, B, C, D, 0, 7, 0xD76AA478 );
+ P( D, A, B, C, 1, 12, 0xE8C7B756 );
+ P( C, D, A, B, 2, 17, 0x242070DB );
+ P( B, C, D, A, 3, 22, 0xC1BDCEEE );
+ P( A, B, C, D, 4, 7, 0xF57C0FAF );
+ P( D, A, B, C, 5, 12, 0x4787C62A );
+ P( C, D, A, B, 6, 17, 0xA8304613 );
+ P( B, C, D, A, 7, 22, 0xFD469501 );
+ P( A, B, C, D, 8, 7, 0x698098D8 );
+ P( D, A, B, C, 9, 12, 0x8B44F7AF );
+ P( C, D, A, B, 10, 17, 0xFFFF5BB1 );
+ P( B, C, D, A, 11, 22, 0x895CD7BE );
+ P( A, B, C, D, 12, 7, 0x6B901122 );
+ P( D, A, B, C, 13, 12, 0xFD987193 );
+ P( C, D, A, B, 14, 17, 0xA679438E );
+ P( B, C, D, A, 15, 22, 0x49B40821 );
+
+#undef F
+
+#define F(x,y,z) (y ^ (z & (x ^ y)))
+
+ P( A, B, C, D, 1, 5, 0xF61E2562 );
+ P( D, A, B, C, 6, 9, 0xC040B340 );
+ P( C, D, A, B, 11, 14, 0x265E5A51 );
+ P( B, C, D, A, 0, 20, 0xE9B6C7AA );
+ P( A, B, C, D, 5, 5, 0xD62F105D );
+ P( D, A, B, C, 10, 9, 0x02441453 );
+ P( C, D, A, B, 15, 14, 0xD8A1E681 );
+ P( B, C, D, A, 4, 20, 0xE7D3FBC8 );
+ P( A, B, C, D, 9, 5, 0x21E1CDE6 );
+ P( D, A, B, C, 14, 9, 0xC33707D6 );
+ P( C, D, A, B, 3, 14, 0xF4D50D87 );
+ P( B, C, D, A, 8, 20, 0x455A14ED );
+ P( A, B, C, D, 13, 5, 0xA9E3E905 );
+ P( D, A, B, C, 2, 9, 0xFCEFA3F8 );
+ P( C, D, A, B, 7, 14, 0x676F02D9 );
+ P( B, C, D, A, 12, 20, 0x8D2A4C8A );
+
+#undef F
+
+#define F(x,y,z) (x ^ y ^ z)
+
+ P( A, B, C, D, 5, 4, 0xFFFA3942 );
+ P( D, A, B, C, 8, 11, 0x8771F681 );
+ P( C, D, A, B, 11, 16, 0x6D9D6122 );
+ P( B, C, D, A, 14, 23, 0xFDE5380C );
+ P( A, B, C, D, 1, 4, 0xA4BEEA44 );
+ P( D, A, B, C, 4, 11, 0x4BDECFA9 );
+ P( C, D, A, B, 7, 16, 0xF6BB4B60 );
+ P( B, C, D, A, 10, 23, 0xBEBFBC70 );
+ P( A, B, C, D, 13, 4, 0x289B7EC6 );
+ P( D, A, B, C, 0, 11, 0xEAA127FA );
+ P( C, D, A, B, 3, 16, 0xD4EF3085 );
+ P( B, C, D, A, 6, 23, 0x04881D05 );
+ P( A, B, C, D, 9, 4, 0xD9D4D039 );
+ P( D, A, B, C, 12, 11, 0xE6DB99E5 );
+ P( C, D, A, B, 15, 16, 0x1FA27CF8 );
+ P( B, C, D, A, 2, 23, 0xC4AC5665 );
+
+#undef F
+
+#define F(x,y,z) (y ^ (x | ~z))
+
+ P( A, B, C, D, 0, 6, 0xF4292244 );
+ P( D, A, B, C, 7, 10, 0x432AFF97 );
+ P( C, D, A, B, 14, 15, 0xAB9423A7 );
+ P( B, C, D, A, 5, 21, 0xFC93A039 );
+ P( A, B, C, D, 12, 6, 0x655B59C3 );
+ P( D, A, B, C, 3, 10, 0x8F0CCC92 );
+ P( C, D, A, B, 10, 15, 0xFFEFF47D );
+ P( B, C, D, A, 1, 21, 0x85845DD1 );
+ P( A, B, C, D, 8, 6, 0x6FA87E4F );
+ P( D, A, B, C, 15, 10, 0xFE2CE6E0 );
+ P( C, D, A, B, 6, 15, 0xA3014314 );
+ P( B, C, D, A, 13, 21, 0x4E0811A1 );
+ P( A, B, C, D, 4, 6, 0xF7537E82 );
+ P( D, A, B, C, 11, 10, 0xBD3AF235 );
+ P( C, D, A, B, 2, 15, 0x2AD7D2BB );
+ P( B, C, D, A, 9, 21, 0xEB86D391 );
+
+#undef F
+
+ ctx->state[0] += A;
+ ctx->state[1] += B;
+ ctx->state[2] += C;
+ ctx->state[3] += D;
+}
+
+/*
+ * MD5 process buffer
+ */
+void md5_update( md5_context *ctx, const unsigned char *input, int ilen )
+{
+ int fill;
+ unsigned long left;
+
+ if( ilen <= 0 )
+ return;
+
+ left = ctx->total[0] & 0x3F;
+ fill = 64 - left;
+
+ ctx->total[0] += ilen;
+ ctx->total[0] &= 0xFFFFFFFF;
+
+ if( ctx->total[0] < (unsigned long) ilen )
+ ctx->total[1]++;
+
+ if( left && ilen >= fill )
+ {
+ memcpy( (void *) (ctx->buffer + left),
+ (void *) input, fill );
+ md5_process( ctx, ctx->buffer );
+ input += fill;
+ ilen -= fill;
+ left = 0;
+ }
+
+ while( ilen >= 64 )
+ {
+ md5_process( ctx, input );
+ input += 64;
+ ilen -= 64;
+ }
+
+ if( ilen > 0 )
+ {
+ memcpy( (void *) (ctx->buffer + left),
+ (void *) input, ilen );
+ }
+}
+
+static const unsigned char md5_padding[64] =
+{
+ 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+/*
+ * MD5 final digest
+ */
+void md5_finish( md5_context *ctx, unsigned char output[16] )
+{
+ unsigned long last, padn;
+ unsigned long high, low;
+ unsigned char msglen[8];
+
+ high = ( ctx->total[0] >> 29 )
+ | ( ctx->total[1] << 3 );
+ low = ( ctx->total[0] << 3 );
+
+ PUT_ULONG_LE( low, msglen, 0 );
+ PUT_ULONG_LE( high, msglen, 4 );
+
+ last = ctx->total[0] & 0x3F;
+ padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
+
+ md5_update( ctx, (unsigned char *) md5_padding, padn );
+ md5_update( ctx, msglen, 8 );
+
+ PUT_ULONG_LE( ctx->state[0], output, 0 );
+ PUT_ULONG_LE( ctx->state[1], output, 4 );
+ PUT_ULONG_LE( ctx->state[2], output, 8 );
+ PUT_ULONG_LE( ctx->state[3], output, 12 );
+}
+
+/*
+ * output = MD5( input buffer )
+ */
+void md5( const unsigned char *input, int ilen, unsigned char output[16] )
+{
+ md5_context ctx;
+
+ md5_starts( &ctx );
+ md5_update( &ctx, input, ilen );
+ md5_finish( &ctx, output );
+
+ memset( &ctx, 0, sizeof( md5_context ) );
+}
+
+/*
+ * output = MD5( file contents )
+ */
+int md5_file( const char *path, unsigned char output[16] )
+{
+ FILE *f;
+ size_t n;
+ md5_context ctx;
+ unsigned char buf[1024];
+
+ if( ( f = fopen( path, "rb" ) ) == NULL )
+ return( 1 );
+
+ md5_starts( &ctx );
+
+ while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
+ md5_update( &ctx, buf, (int) n );
+
+ md5_finish( &ctx, output );
+
+ memset( &ctx, 0, sizeof( md5_context ) );
+
+ if( ferror( f ) != 0 )
+ {
+ fclose( f );
+ return( 2 );
+ }
+
+ fclose( f );
+ return( 0 );
+}
+
projects / platform / upstream / libwebsockets.git / commitdiff