Revision 0:7ddb56bfde0c, committed 2011-03-23

Comitter:

soramimi

Date:

Wed Mar 23 19:53:42 2011 +0000

Child:

1:c3f74457cad4

Commit message:

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EthernetNetIf.lib	Wed Mar 23 19:53:42 2011 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mamezu/code/EthernetNetIf/#0f6c82fcde82

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HTTPClient.lib	Wed Mar 23 19:53:42 2011 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mamezu/code/HTTPClient/#62fac7f06c8d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NTPClient.lib	Wed Mar 23 19:53:42 2011 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/donatien/code/NTPClient/#7c3f1199256a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hash.cpp	Wed Mar 23 19:53:42 2011 +0000
@@ -0,0 +1,56 @@
+
+#include "oauth.h" // base64 encode fn's.
+#include "sha1.h"
+
+#include <string.h>
+
+void hmac_sha1(unsigned char const *key, size_t keylen, unsigned char const *in, size_t inlen, unsigned char *resbuf)
+{
+    struct SHA1Context inner;
+    struct SHA1Context outer;
+    unsigned char tmpkey[20];
+    unsigned char digest[20];
+    unsigned char block[64];
+
+    const int IPAD = 0x36;
+    const int OPAD = 0x5c;
+
+    if (keylen > 64) {
+        struct SHA1Context keyhash;
+        SHA1Reset(&keyhash);
+        SHA1Input(&keyhash, key, keylen);
+        SHA1Result(&keyhash, tmpkey);
+        key = tmpkey;
+        keylen = 20;
+    }
+
+    for (size_t i = 0; i < sizeof(block); i++) {
+        block[i] = IPAD ^ (i < keylen ? key[i] : 0);
+    }
+    SHA1Reset(&inner);
+    SHA1Input(&inner, block, 64);
+    SHA1Input(&inner, in, inlen);
+    SHA1Result(&inner, digest);
+
+    for (size_t i = 0; i < sizeof(block); i++) {
+        block[i] = OPAD ^ (i < keylen ? key[i] : 0);
+    }
+    SHA1Reset(&outer);
+    SHA1Input(&outer, block, 64);
+    SHA1Input(&outer, digest, 20);
+    SHA1Result(&outer, resbuf);
+}
+
+
+std::string oauth_sign_hmac_sha1(const char *m, const char *k)
+{
+    return oauth_sign_hmac_sha1_raw(m, strlen(m), k, strlen(k));
+}
+
+std::string oauth_sign_hmac_sha1_raw(const char *m, const size_t ml, const char *k, const size_t kl)
+{
+    unsigned char result[20];
+    hmac_sha1((unsigned char const *)k, kl, (unsigned char const *)m, ml, result);
+    return oauth_encode_base64(result, 20);
+}
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Mar 23 19:53:42 2011 +0000
@@ -0,0 +1,66 @@
+#include "mbed.h"
+#include "EthernetNetIf.h"
+#include "HTTPClient.h"
+#include "NTPClient.h"
+
+#include "oauth.h"
+
+EthernetNetIf eth(IpAddr(192,168,0,100), //IP Address
+                  IpAddr(255,255,255,0), //Network Mask
+                  IpAddr(192,168,0,1), //Gateway
+                  IpAddr(192,168,0,1)  //DNS
+);
+NTPClient ntp;
+HTTPClient http;
+
+DigitalOut led(LED1);
+
+// IMPORTANT: please change the following keys for your application.
+
+static char const consumer_key[] = "AAAAAAAAAAAAAAAAAAAAAA";
+static char const consumer_secret[] = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
+
+static char const token_key[] = "00000000-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
+static char const token_secret[] = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
+
+// get current time and set to system clock
+
+void reset_time()
+{
+    Host server(IpAddr(), 123, "ntp.jst.mfeed.ad.jp");
+    ntp.setTime(server);
+}
+
+// post message to Twitter
+
+void tweet(char const *message)
+{
+
+    std::string uri = "http://api.twitter.com/statuses/update.xml";
+    uri += "?status=";
+    uri += oauth_url_escape(message);
+
+    std::string req_url;
+    std::string postarg;
+
+    req_url = oauth_sign_url2(uri.c_str(), &postarg, OA_HMAC, 0, consumer_key, consumer_secret, token_key, token_secret);
+    oauth_http_post(req_url.c_str(), postarg.c_str());
+}
+
+//
+
+int main()
+{
+    eth.setup();
+
+    reset_time();
+
+    tweet("Hello, world");
+
+    while(1) {
+        led = 1;
+        wait(0.5);
+        led = 0;
+        wait(0.5);
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Mar 23 19:53:42 2011 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/oauth.cpp	Wed Mar 23 19:53:42 2011 +0000
@@ -0,0 +1,719 @@
+/*
+ * OAuth string functions in POSIX-C.
+ *
+ * Copyright 2007-2010 Robin Gareus <robin@gareus.org>
+ * 
+ * The base64 functions are by Jan-Henrik Haukeland, <hauk@tildeslash.com>
+ * and un/escape_url() was inspired by libcurl's curl_escape under ISC-license
+ * many thanks to Daniel Stenberg <daniel@haxx.se>.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ * 
+ */
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#define WIPE_MEMORY ///< overwrite sensitve data before free()ing it.
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <math.h>
+#include <ctype.h> // isxdigit
+
+#include "oauth.h"
+
+#include <vector>
+#include <algorithm>
+#include <sstream>
+
+/**
+ * Base64 encode one byte
+ */
+char oauth_b64_encode(unsigned char u)
+{
+    if (u < 26)  return 'A' + u;
+    if (u < 52)  return 'a' + (u - 26);
+    if (u < 62)  return '0' + (u - 52);
+    if (u == 62) return '+';
+    return '/';
+}
+
+/**
+ * Decode a single base64 character.
+ */
+unsigned char oauth_b64_decode(char c)
+{
+    if (c >= 'A' && c <= 'Z') return(c - 'A');
+    if (c >= 'a' && c <= 'z') return(c - 'a' + 26);
+    if (c >= '0' && c <= '9') return(c - '0' + 52);
+    if (c == '+')             return 62;
+    return 63;
+}
+
+/**
+ * Return TRUE if 'c' is a valid base64 character, otherwise FALSE
+ */
+bool oauth_b64_is_base64(char c)
+{
+    return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || (c == '+') || (c == '/') || (c == '='));
+}
+
+/**
+ * Base64 encode and return size data in 'src'. The caller must free the
+ * returned string.
+ *
+ * @param size The size of the data in src
+ * @param src The data to be base64 encode
+ * @return encoded string otherwise NULL
+ */
+std::string oauth_encode_base64(const unsigned char *src, int size)
+{
+    int i;
+    std::stringbuf sb;
+
+    if (!src) return NULL;
+    if (!size) size= strlen((char *)src);
+
+    for (i = 0; i < size; i += 3) {
+        unsigned char b1 = 0, b2 = 0, b3 = 0, b4 = 0, b5 = 0, b6 = 0, b7 = 0;
+        b1= src[i];
+        if (i + 1 < size) b2 = src[i + 1];
+        if (i + 2 < size) b3 = src[i + 2];
+
+        b4= b1 >> 2;
+        b5= ((b1 & 0x3) << 4) | (b2 >> 4);
+        b6= ((b2 & 0xf) << 2) | (b3 >> 6);
+        b7= b3 & 0x3f;
+
+        sb.sputc(oauth_b64_encode(b4));
+        sb.sputc(oauth_b64_encode(b5));
+
+        if (i + 1 < size) {
+            sb.sputc(oauth_b64_encode(b6));
+        } else {
+            sb.sputc('=');
+        }
+
+        if (i + 2 < size) {
+            sb.sputc(oauth_b64_encode(b7));
+        } else {
+            sb.sputc('=');
+        }
+    }
+    return sb.str();
+}
+
+/**
+ * Decode the base64 encoded string 'src' into the memory pointed to by
+ * 'dest'. 
+ *
+ * @param dest Pointer to memory for holding the decoded string.
+ * Must be large enough to receive the decoded string.
+ * @param src A base64 encoded string.
+ * @return the length of the decoded string if decode
+ * succeeded otherwise 0.
+ */
+std::string oauth_decode_base64(const char *src)
+{
+    if (src && *src) {
+        std::stringbuf sb;
+        //unsigned char *p= dest;
+        int k, l= strlen(src)+1;
+        std::vector<unsigned char> buf(l);
+
+        /* Ignore non base64 chars as per the POSIX standard */
+        for (k = 0, l = 0; src[k]; k++) {
+            if (oauth_b64_is_base64(src[k])) {
+                buf[l++]= src[k];
+            }
+        } 
+
+        for (k = 0; k < l; k += 4) {
+            char c1='A', c2='A', c3='A', c4='A';
+            unsigned char b1 = 0, b2 = 0, b3 = 0, b4 = 0;
+            c1= buf[k];
+
+            if (k + 1 < l) c2 = buf[k + 1];
+            if (k + 2 < l) c3 = buf[k + 2];
+            if (k + 3 < l) c4 = buf[k + 3];
+
+            b1 = oauth_b64_decode(c1);
+            b2 = oauth_b64_decode(c2);
+            b3 = oauth_b64_decode(c3);
+            b4 = oauth_b64_decode(c4);
+
+            sb.sputc((b1 << 2) | (b2 >> 4));
+
+            if (c3 != '=') sb.sputc(((b2 & 0xf) << 4) | (b3 >> 2));
+            if (c4 != '=') sb.sputc(((b3 & 0x3) << 6) | b4);
+        }
+
+        return sb.str();
+    }
+    return 0;
+}
+
+/**
+ * Escape 'string' according to RFC3986 and
+ * http://oauth.net/core/1.0/#encoding_parameters.
+ *
+ * @param string The data to be encoded
+ * @return encoded string otherwise NULL
+ * The caller must free the returned string.
+ */
+std::string oauth_url_escape(const char *string)
+{
+    unsigned char in; 
+    size_t length;
+
+    if (!string) {
+        return std::string();
+    }
+
+    length = strlen(string);
+
+    std::stringbuf sb;
+
+    while (length--) {
+        in = *string;
+        if (strchr("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_~.-", in)) {
+            sb.sputc(in);
+        } else {
+            char tmp[10];
+            snprintf(tmp, 4, "%%%02X", in);
+            sb.sputc(tmp[0]);
+            sb.sputc(tmp[1]);
+            sb.sputc(tmp[2]);
+        }
+        string++;
+    }
+    return sb.str();
+}
+
+#ifndef ISXDIGIT
+# define ISXDIGIT(x) (isxdigit((int) ((unsigned char)x)))
+#endif
+
+/**
+ * Parse RFC3986 encoded 'string' back to  unescaped version.
+ *
+ * @param string The data to be unescaped
+ * @param olen unless NULL the length of the returned string is stored there.
+ * @return decoded string or NULL
+ * The caller must free the returned string.
+ */
+std::string oauth_url_unescape(const char *string)
+{
+    size_t alloc, strindex=0;
+    unsigned char in;
+    long hex;
+
+    if (!string) return NULL;
+
+    alloc = strlen(string)+1;
+    std::vector<char> ns(alloc);
+
+    while(--alloc > 0) {
+        in = *string;
+        if (('%' == in) && ISXDIGIT(string[1]) && ISXDIGIT(string[2])) {
+            char hexstr[3]; // '%XX'
+            hexstr[0] = string[1];
+            hexstr[1] = string[2];
+            hexstr[2] = 0;
+            hex = strtol(hexstr, NULL, 16);
+            in = (unsigned char)hex; /* hex is always < 256 */
+            string += 2;
+            alloc -= 2;
+        }
+        ns[strindex++] = in;
+        string++;
+    }
+    ns[strindex]=0;
+    return &ns[0];
+}
+
+/**
+ * returns plaintext signature for the given key.
+ *
+ * the returned string needs to be freed by the caller
+ *
+ * @param m message to be signed
+ * @param k key used for signing
+ * @return signature string
+ */
+std::string oauth_sign_plaintext (const char *m, const char *k)
+{
+    return oauth_url_escape(k);
+}
+
+/**
+ * encode strings and concatenate with '&' separator.
+ * The number of strings to be concatenated must be
+ * given as first argument.
+ * all arguments thereafter must be of type (char *) 
+ *
+ * @param len the number of arguments to follow this parameter
+ * @param ... string to escape and added (may be NULL)
+ *
+ * @return pointer to memory holding the concatenated 
+ * strings - needs to be free(d) by the caller. or NULL
+ * in case we ran out of memory.
+ */
+std::string oauth_catenc(int len, ...)
+{
+    va_list va;
+    std::string str;
+    va_start(va, len);
+    for (int i = 0; i < len; i++) {
+        char *arg = va_arg(va, char *);
+        std::string enc = oauth_url_escape(arg);
+        if (i > 0) str += "&";
+        str += enc;
+    }
+    va_end(va);
+    return str;
+}
+
+/**
+ * splits the given url into a parameter array. 
+ * (see \ref oauth_serialize_url and \ref oauth_serialize_url_parameters for the reverse)
+ *
+ * NOTE: Request-parameters-values may include an ampersand character.
+ * However if unescaped this function will use them as parameter delimiter. 
+ * If you need to make such a request, this function since version 0.3.5 allows
+ * to use the ASCII SOH (0x01) character as alias for '&' (0x26).
+ * (the motivation is convenience: SOH is /untypeable/ and much more 
+ * unlikely to appear than '&' - If you plan to sign fancy URLs you 
+ * should not split a query-string, but rather provide the parameter array
+ * directly to \ref oauth_serialize_url)
+ *
+ * @param url the url or query-string to parse. 
+ * @param argv pointer to a (char *) array where the results are stored.
+ *  The array is re-allocated to match the number of parameters and each 
+ *  parameter-string is allocated with strdup. - The memory needs to be freed
+ *  by the caller.
+ * @param qesc use query parameter escape (vs post-param-escape) - if set
+ *        to 1 all '+' are treated as spaces ' '
+ * 
+ * @return number of parameter(s) in array.
+ */
+void oauth_split_post_paramters(const char *url, std::vector<std::string> *argv, short qesc)
+{
+    int argc=0;
+    char *token, *tmp;
+    if (!argv) return;
+    if (!url) return;
+    std::vector<char> t1(strlen(url) + 1);
+    strcpy(&t1[0], url);
+
+    // '+' represents a space, in a URL query string
+    while ((qesc&1) && (tmp = strchr(&t1[0],'+'))) *tmp = ' ';
+
+    tmp = &t1[0];
+    while ((token = strtok(tmp,"&?"))) {
+        if (!strncasecmp("oauth_signature=", token, 16)) continue;
+        while (!(qesc & 2) && (tmp = strchr(token, '\001'))) *tmp = '&';
+        argv->push_back(oauth_url_unescape(token));
+        if (argc == 0 && strstr(token, ":/")) {
+            // HTTP does not allow empty absolute paths, so the URL 
+            // 'http://example.com' is equivalent to 'http://example.com/' and should
+            // be treated as such for the purposes of OAuth signing (rfc2616, section 3.2.1)
+            // see http://groups.google.com/group/oauth/browse_thread/thread/c44b6f061bfd98c?hl=en
+            char *slash = strstr(token, ":/");
+            while (slash && *(++slash) == '/')  ; // skip slashes eg /xxx:[\/]*/
+#if 0
+            // skip possibly unescaped slashes in the userinfo - they're not allowed by RFC2396 but have been seen.
+            // the hostname/IP may only contain alphanumeric characters - so we're safe there.
+            if (slash && strchr(slash,'@')) slash=strchr(slash, '@'); 
+#endif
+            if (slash && !strchr(slash,'/')) {
+#ifdef DEBUG_OAUTH
+                fprintf(stderr, "\nliboauth: added trailing slash to URL: '%s'\n\n", token);
+#endif
+                argv->push_back(std::string(token) + "/");
+            }
+        }
+        if (argc == 0 && (tmp = strstr((char *)argv->at(argc).c_str(), ":80/"))) {
+            memmove(tmp, tmp + 3, strlen(tmp + 2));
+        }
+        tmp = NULL;
+        argc++;
+    }
+}
+
+void oauth_split_url_parameters(const char *url, std::vector<std::string> *argv)
+{
+    oauth_split_post_paramters(url, argv, 1);
+}
+
+/**
+ * build a url query string from an array.
+ *
+ * @param argc the total number of elements in the array
+ * @param start element in the array at which to start concatenating.
+ * @param argv parameter-array to concatenate.
+ * @return url string needs to be freed by the caller.
+ *
+ */
+std::string oauth_serialize_url (std::vector<std::string> const &argv, int start)
+{
+    return oauth_serialize_url_sep(argv, start, "&", 0);
+}
+
+/**
+ * encode query parameters from an array.
+ *
+ * @param argc the total number of elements in the array
+ * @param start element in the array at which to start concatenating.
+ * @param argv parameter-array to concatenate.
+ * @param sep separator for parameters (usually "&") 
+ * @param mod - bitwise modifiers: 
+ *   1: skip all values that start with "oauth_"
+ *   2: skip all values that don't start with "oauth_"
+ *   4: add double quotation marks around values (use with sep=", " to generate HTTP Authorization header).
+ * @return url string needs to be freed by the caller.
+ */
+std::string oauth_serialize_url_sep(std::vector<std::string> const &argv, int start, char const *sep, int mod)
+{
+    int i;
+    int first = 0;
+    int seplen = strlen(sep);
+    std::string query;
+    for (i = start; i < (int)argv.size(); i++) {
+        std::string tmp;
+
+        if ((mod & 1) == 1 && (strncmp(argv[i].c_str(), "oauth_", 6) == 0 || strncmp(argv[i].c_str(), "x_oauth_", 8) == 0)) continue;
+        if ((mod & 2) == 2 && (strncmp(argv[i].c_str(), "oauth_", 6) != 0 && strncmp(argv[i].c_str(), "x_oauth_", 8) != 0) && i != 0) continue;
+
+        if (i == start && i == 0 && strstr(argv[i].c_str(), ":/")) {
+            tmp = argv[i];
+        } else {
+            char *p = strchr((char *)argv[i].c_str(), '=');
+            if (p) {
+                tmp = oauth_url_escape(std::string(argv[i].c_str(), (char const *)p).c_str());
+                std::string t2 = oauth_url_escape(p + 1);
+                tmp += "=";
+                if (mod & 4) tmp += "\"";
+                tmp += t2;
+                if (mod & 4) tmp += "\"";
+            } else {
+                // see http://oauth.net/core/1.0/#anchor14
+                // escape parameter names and arguments but not the '='
+                tmp=argv[i];
+                tmp += "=";
+            }
+        }
+        query += ((i == start || first) ? "" : sep);
+        query += tmp;
+        first = 0;
+        if (i == start && i == 0 && strstr((char *)tmp.c_str(), ":/")) {
+            query += "?";
+            first = 1;
+        }
+    }
+    return (query);
+}
+
+/**
+ * build a query parameter string from an array.
+ *
+ * This function is a shortcut for \ref oauth_serialize_url (argc, 1, argv). 
+ * It strips the leading host/path, which is usually the first 
+ * element when using oauth_split_url_parameters on an URL.
+ *
+ * @param argc the total number of elements in the array
+ * @param argv parameter-array to concatenate.
+ * @return url string needs to be freed by the caller.
+ */
+std::string oauth_serialize_url_parameters (std::vector<std::string> const &argv)
+{
+    return oauth_serialize_url(argv, 1);
+}
+
+/**
+ * generate a random string between 15 and 32 chars length
+ * and return a pointer to it. The value needs to be freed by the
+ * caller
+ *
+ * @return zero terminated random string.
+ */
+std::string oauth_gen_nonce()
+{
+    static const char *chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_";
+    const unsigned int max = 26 + 26 + 10 + 1; //strlen(chars);
+    char tmp[50];
+    int i, len;
+
+    srand((unsigned int)time(0));
+    len = 15 + rand() % 16;
+    for (i = 0; i < len; i++) {
+        tmp[i] = chars[rand() % max];
+    }
+    tmp[i]='\0';
+    return &tmp[0];
+}
+
+/**
+ * string compare function for oauth parameters.
+ *
+ * used with qsort. needed to normalize request parameters.
+ * see http://oauth.net/core/1.0/#anchor14
+ */
+int oauth_cmpstringp(const void *p1, const void *p2)
+{
+    char const *e1;
+    char const *e2;
+    e1 = strchr((char *)p1, '=');
+    e2 = strchr((char *)p2, '=');
+    if (e1 && e2) {
+        std::string left((char const *)p1, e1);
+        std::string right((char const *)p2, e2);
+        return strcmp(left.c_str(), right.c_str());
+    }
+
+    std::string left = oauth_url_escape((char const *)p1);
+    std::string right = oauth_url_escape((char const *)p2);
+    return strcmp(left.c_str(), right.c_str());
+}
+
+bool oauth_cmpstringp_ex(std::string const &left, std::string const &right)
+{
+    return oauth_cmpstringp(left.c_str(), right.c_str()) < 0;
+}
+
+/**
+ * search array for parameter key.
+ * @param argv length of array to search
+ * @param argc parameter array to search
+ * @param key key of parameter to check.
+ *
+ * @return FALSE (0) if array does not contain a parameter with given key, TRUE (1) otherwise.
+ */
+bool oauth_param_exists(std::vector<std::string> const &argv, char const *key)
+{
+    int i;
+    size_t l = strlen(key);
+    for (i = 0; i < (int)argv.size(); i++) {
+        if (!strncmp(argv[i].c_str(), key, l) && argv[i][l] == '=') {
+            return true;
+        }
+    }
+    return false;
+}
+
+/**
+ *
+ */
+void oauth_add_protocol(
+    std::vector<std::string> *argvp, 
+    OAuthMethod method, 
+    const char *c_key, //< consumer key - posted plain text
+    const char *t_key //< token key - posted plain text in URL
+)
+{
+    char oarg[1024];
+
+    // add OAuth specific arguments
+    if (!oauth_param_exists(*argvp,"oauth_nonce")) {
+        std::string tmp = oauth_gen_nonce();
+        snprintf(oarg, 1024, "oauth_nonce=%s", tmp.c_str());
+        argvp->push_back(oarg);
+    }
+
+    if (!oauth_param_exists(*argvp,"oauth_timestamp")) {
+        long t = time(0);
+        snprintf(oarg, 1024, "oauth_timestamp=%u", t);
+        argvp->push_back(oarg);
+    }
+
+    if (t_key) {
+        snprintf(oarg, 1024, "oauth_token=%s", t_key);
+        argvp->push_back(oarg);
+    }
+
+    snprintf(oarg, 1024, "oauth_consumer_key=%s", c_key);
+    argvp->push_back(oarg);
+
+    snprintf(oarg, 1024, "oauth_signature_method=%s", method==0?"HMAC-SHA1":method==1?"RSA-SHA1":"PLAINTEXT");
+    argvp->push_back(oarg);
+
+    if (!oauth_param_exists(*argvp,"oauth_version")) {
+        snprintf(oarg, 1024, "oauth_version=1.0");
+        argvp->push_back(oarg);
+    }
+
+#if 0 // oauth_version 1.0 Rev A
+    if (!oauth_param_exists(argv,argc,"oauth_callback")) {
+        snprintf(oarg, 1024, "oauth_callback=oob");
+        argvp->push_back(oarg);
+    }
+#endif
+
+}
+
+std::string oauth_sign_url(
+    const char *url,
+    std::string *postargs, 
+    OAuthMethod method, 
+    const char *c_key, //< consumer key - posted plain text
+    const char *c_secret, //< consumer secret - used as 1st part of secret-key 
+    const char *t_key, //< token key - posted plain text in URL
+    const char *t_secret //< token secret - used as 2st part of secret-key
+)
+{
+    return oauth_sign_url2(url, postargs, method, NULL, c_key, c_secret, t_key, t_secret);
+} 
+
+std::string oauth_sign_url2(
+    const char *url,
+    std::string *postargs, 
+    OAuthMethod method, 
+    const char *http_method, //< HTTP request method
+    const char *c_key, //< consumer key - posted plain text
+    const char *c_secret, //< consumer secret - used as 1st part of secret-key 
+    const char *t_key, //< token key - posted plain text in URL
+    const char *t_secret //< token secret - used as 2st part of secret-key
+)
+{
+    //char **argv = NULL;
+    std::vector<std::string> argv;
+    std::string rv;
+
+    if (postargs) {
+        oauth_split_post_paramters(url, &argv, 0);
+    } else {
+        oauth_split_url_parameters(url, &argv);
+    }
+
+    rv = oauth_sign_array2(&argv, postargs, method, http_method, c_key, c_secret, t_key, t_secret);
+
+    return(rv);
+}
+
+std::string oauth_sign_array(
+    std::vector<std::string> *argvp,
+    std::string *postargs,
+    OAuthMethod method, 
+    const char *c_key, //< consumer key - posted plain text
+    const char *c_secret, //< consumer secret - used as 1st part of secret-key 
+    const char *t_key, //< token key - posted plain text in URL
+    const char *t_secret //< token secret - used as 2st part of secret-key
+)
+{
+    return oauth_sign_array2(
+        argvp, 
+        postargs, method,
+        NULL,
+        c_key, c_secret,
+        t_key, t_secret
+        );
+}
+
+void oauth_sign_array2_process(
+    std::vector<std::string> *argvp,
+    std::string *postargs,
+    OAuthMethod method, 
+    const char *http_method, //< HTTP request method
+    const char *c_key, //< consumer key - posted plain text
+    const char *c_secret, //< consumer secret - used as 1st part of secret-key 
+    const char *t_key, //< token key - posted plain text in URL
+    const char *t_secret //< token secret - used as 2st part of secret-key
+)
+{
+    char oarg[1024];
+    std::string query;
+    std::string sign;
+    std::string http_request_method;
+
+    if (!http_method) {
+        http_request_method = postargs ? "POST" : "GET";
+    } else {
+        std::vector<char> tmp(strlen(http_method) + 1);
+        int i;
+        for (i = 0; http_method[i]; i++) {
+            tmp[i] = toupper(http_method[i]);
+        }
+        tmp[i] = 0;
+        http_request_method = &tmp[0];
+    }
+
+    // add required OAuth protocol parameters
+    oauth_add_protocol(argvp, method, c_key, t_key);
+
+    // sort parameters
+    //qsort(&(*argvp)[1], (*argcp)-1, sizeof(char *), oauth_cmpstringp);
+    std::sort(argvp->begin() + 1, argvp->end(), oauth_cmpstringp_ex);
+
+    // serialize URL - base-url 
+    query= oauth_serialize_url_parameters(*argvp);
+
+    // generate signature
+    std::string okey = oauth_catenc(2, c_secret, t_secret);
+    std::string odat = oauth_catenc(3, http_request_method.c_str(), (*argvp)[0].c_str(), query.c_str()); // base-string
+#ifdef DEBUG_OAUTH
+    fprintf (stderr, "\nliboauth: data to sign='%s'\n\n", odat.c_str());
+    fprintf (stderr, "\nliboauth: key='%s'\n\n", okey.c_str());
+#endif
+    switch(method) {
+    //case OA_RSA:
+    //    sign = oauth_sign_rsa_sha1(odat.c_str(), okey.c_str()); // XXX okey needs to be RSA key!
+    //    break;
+    case OA_PLAINTEXT:
+        sign = oauth_sign_plaintext(odat.c_str(), okey.c_str()).c_str();
+        break;
+    default:
+        sign = oauth_sign_hmac_sha1(odat.c_str(), okey.c_str());
+        break;
+    }
+
+    // append signature to query args.
+    snprintf(oarg, 1024, "oauth_signature=%s",sign.c_str());
+    argvp->push_back(oarg);
+}
+
+std::string oauth_sign_array2(
+    std::vector<std::string> *argvp,
+    std::string *postargs,
+    OAuthMethod method, 
+    const char *http_method, //< HTTP request method
+    const char *c_key, //< consumer key - posted plain text
+    const char *c_secret, //< consumer secret - used as 1st part of secret-key 
+    const char *t_key, //< token key - posted plain text in URL
+    const char *t_secret //< token secret - used as 2st part of secret-key
+)
+{
+
+    std::string result;
+    oauth_sign_array2_process(argvp, postargs, method, http_method, c_key, c_secret, t_key, t_secret);
+
+    // build URL params
+    result = oauth_serialize_url(*argvp, (postargs?1:0));
+
+    if (postargs) { 
+        *postargs = result;
+        result = argvp->at(0);
+    }
+
+    return result;
+}
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/oauth.h	Wed Mar 23 19:53:42 2011 +0000
@@ -0,0 +1,476 @@
+/**
+ *  @brief OAuth.net implementation in POSIX-C.
+ *  @file oauth.h
+ *  @author Robin Gareus <robin@gareus.org>
+ *
+ * Copyright 2007-2010 Robin Gareus <robin@gareus.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+#ifndef _OAUTH_H
+#define _OAUTH_H      1 
+
+#include <vector>
+#include <string>
+
+#include <stdlib.h>
+
+#ifndef DOXYGEN_IGNORE
+// liboauth version
+#define LIBOAUTH_VERSION "0.8.9"
+#define LIBOAUTH_VERSION_MAJOR  0
+#define LIBOAUTH_VERSION_MINOR  8
+#define LIBOAUTH_VERSION_MICRO  9
+
+//interface revision number
+//http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
+#define LIBOAUTH_CUR  7
+#define LIBOAUTH_REV  0
+#define LIBOAUTH_AGE  7
+#endif
+
+#ifdef __GNUC__
+#    define OA_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > x || __GNUC__ == x && __GNUC_MINOR__ >= y)
+#else
+#    define OA_GCC_VERSION_AT_LEAST(x,y) 0
+#endif
+
+#ifndef attribute_deprecated
+#if OA_GCC_VERSION_AT_LEAST(3,1)
+#    define attribute_deprecated __attribute__((deprecated))
+#else
+#    define attribute_deprecated
+#endif
+#endif
+
+/** \enum OAuthMethod
+ * signature method to used for signing the request.
+ */ 
+typedef enum { 
+    OA_HMAC=0, ///< use HMAC-SHA1 request signing method
+    OA_RSA, ///< use RSA signature 
+    OA_PLAINTEXT ///< use plain text signature (for testing only)
+  } OAuthMethod;
+
+/**
+ * Base64 encode and return size data in 'src'. The caller must free the
+ * returned string.
+ *
+ * @param size The size of the data in src
+ * @param src The data to be base64 encode
+ * @return encoded string otherwise NULL
+ */
+std::string oauth_encode_base64(const unsigned char *src, int size);
+
+/**
+ * Decode the base64 encoded string 'src' into the memory pointed to by
+ * 'dest'. 
+ *
+ * @param dest Pointer to memory for holding the decoded string.
+ * Must be large enough to receive the decoded string.
+ * @param src A base64 encoded string.
+ * @return the length of the decoded string if decode
+ * succeeded otherwise 0.
+ */
+std::string oauth_decode_base64(const char *src);
+
+/**
+ * Escape 'string' according to RFC3986 and
+ * http://oauth.net/core/1.0/#encoding_parameters.
+ *
+ * @param string The data to be encoded
+ * @return encoded string otherwise NULL
+ * The caller must free the returned string.
+ */
+std::string oauth_url_escape(const char *string);
+
+/**
+ * Parse RFC3986 encoded 'string' back to  unescaped version.
+ *
+ * @param string The data to be unescaped
+ * @param olen unless NULL the length of the returned string is stored there.
+ * @return decoded string or NULL
+ * The caller must free the returned string.
+ */
+std::string oauth_url_unescape(const char *string);
+ 
+
+/**
+ * returns base64 encoded HMAC-SHA1 signature for
+ * given message and key.
+ * both data and key need to be urlencoded.
+ *
+ * the returned string needs to be freed by the caller
+ *
+ * @param m message to be signed
+ * @param k key used for signing
+ * @return signature string.
+ */
+std::string oauth_sign_hmac_sha1 (const char *m, const char *k);
+
+/**
+ * same as \ref oauth_sign_hmac_sha1 but allows
+ * to specify length of message and key (in case they contain null chars).
+ *
+ * @param m message to be signed
+ * @param ml length of message
+ * @param k key used for signing
+ * @param kl length of key
+ * @return signature string.
+ */
+std::string oauth_sign_hmac_sha1_raw(const char *m, const size_t ml, const char *k, const size_t kl);
+
+/**
+ * returns plaintext signature for the given key.
+ *
+ * the returned string needs to be freed by the caller
+ *
+ * @param m message to be signed
+ * @param k key used for signing
+ * @return signature string
+ */
+std::string oauth_sign_plaintext(const char *m, const char *k);
+
+/**
+ * returns RSA-SHA1 signature for given data.
+ * the returned signature needs to be freed by the caller.
+ *
+ * @param m message to be signed
+ * @param k private-key PKCS and Base64-encoded 
+ * @return base64 encoded signature string.
+ */
+//std::string oauth_sign_rsa_sha1 (const char *m, const char *k);
+
+/**
+ * verify RSA-SHA1 signature.
+ *
+ * returns the output of EVP_VerifyFinal() for a given message,
+ * cert/pubkey and signature.
+ *
+ * @param m message to be verified
+ * @param c public-key or x509 certificate
+ * @param s base64 encoded signature
+ * @return 1 for a correct signature, 0 for failure and -1 if some other error occurred
+ */
+int oauth_verify_rsa_sha1(const char *m, const char *c, const char *s);
+
+/**
+ * url-escape strings and concatenate with '&' separator.
+ * The number of strings to be concatenated must be
+ * given as first argument.
+ * all arguments thereafter must be of type (char *) 
+ *
+ * @param len the number of arguments to follow this parameter
+ *
+ * @return pointer to memory holding the concatenated 
+ * strings - needs to be free(d) by the caller. or NULL
+ * in case we ran out of memory.
+ */
+std::string oauth_catenc(int len, ...);
+
+/**
+ * splits the given url into a parameter array. 
+ * (see \ref oauth_serialize_url and \ref oauth_serialize_url_parameters for the reverse)
+ * (see \ref oauth_split_post_paramters for a more generic version)
+ *
+ * @param url the url or query-string to parse; may be NULL
+ * @param argv pointer to a (char *) array where the results are stored.
+ *  The array is re-allocated to match the number of parameters and each 
+ *  parameter-string is allocated with strdup. - The memory needs to be freed
+ *  by the caller.
+ * 
+ * @return number of parameter(s) in array.
+ */
+void oauth_split_url_parameters(const char *url, char ***argv);
+
+/**
+ * splits the given url into a parameter array. 
+ * (see \ref oauth_serialize_url and \ref oauth_serialize_url_parameters for the reverse)
+ *
+ * @param url the url or query-string to parse. 
+ * @param argv pointer to a (char *) array where the results are stored.
+ *  The array is re-allocated to match the number of parameters and each 
+ *  parameter-string is allocated with strdup. - The memory needs to be freed
+ *  by the caller.
+ * @param qesc use query parameter escape (vs post-param-escape) - if set
+ *        to 1 all '+' are treated as spaces ' '
+ * 
+ * @return number of parameter(s) in array.
+ */
+void oauth_split_post_paramters(const char *url, char ***argv, short qesc);
+
+/**
+ * build a url query string from an array.
+ *
+ * @param argc the total number of elements in the array
+ * @param start element in the array at which to start concatenating.
+ * @param argv parameter-array to concatenate.
+ * @return url string needs to be freed by the caller.
+ *
+ */
+std::string oauth_serialize_url (std::vector<std::string> const &argv, int start);
+
+/**
+ * encode query parameters from an array.
+ *
+ * @param argc the total number of elements in the array
+ * @param start element in the array at which to start concatenating.
+ * @param argv parameter-array to concatenate.
+ * @param sep separator for parameters (usually "&") 
+ * @param mod - bitwise modifiers: 
+ *   1: skip all values that start with "oauth_"
+ *   2: skip all values that don't start with "oauth_"
+ *   4: double quotation marks are added around values (use with sep ", " for HTTP Authorization header).
+ * @return url string needs to be freed by the caller.
+ */
+std::string oauth_serialize_url_sep (std::vector<std::string> const &argv, int start, char const *sep, int mod);
+
+/**
+ * build a query parameter string from an array.
+ *
+ * This function is a shortcut for \ref oauth_serialize_url (argc, 1, argv). 
+ * It strips the leading host/path, which is usually the first 
+ * element when using oauth_split_url_parameters on an URL.
+ *
+ * @param argc the total number of elements in the array
+ * @param argv parameter-array to concatenate.
+ * @return url string needs to be freed by the caller.
+ */
+std::string oauth_serialize_url_parameters (std::vector<std::string> const &argv);
+ 
+/**
+ * generate a random string between 15 and 32 chars length
+ * and return a pointer to it. The value needs to be freed by the
+ * caller
+ *
+ * @return zero terminated random string.
+ */
+std::string oauth_gen_nonce();
+
+/**
+ * string compare function for oauth parameters.
+ *
+ * used with qsort. needed to normalize request parameters.
+ * see http://oauth.net/core/1.0/#anchor14
+ */
+int oauth_cmpstringp(const void *p1, const void *p2);
+
+
+/**
+ * search array for parameter key.
+ * @param argv length of array to search
+ * @param argc parameter array to search
+ * @param key key of parameter to check.
+ *
+ * @return FALSE (0) if array does not contain a parameter with given key, TRUE (1) otherwise.
+ */
+bool oauth_param_exists(std::vector<std::string> const &argv, char const *key);
+
+/**
+ * free array args
+ *
+ * @param argcp pointer to array length int
+ * @param argvp pointer to array values to be free()d
+ */
+void oauth_free_array(int *argcp, std::vector<std::string> *argvp);
+
+/**
+ * calculate OAuth-signature for a given HTTP request URL, parameters and oauth-tokens.
+ *
+ * if 'postargs' is NULL a "GET" request is signed and the 
+ * signed URL is returned. Else this fn will modify 'postargs' 
+ * to point to memory that contains the signed POST-variables 
+ * and returns the base URL.
+ *
+ * both, the return value and (if given) 'postargs' need to be freed
+ * by the caller.
+ *
+ * @param url The request URL to be signed. append all GET or POST 
+ * query-parameters separated by either '?' or '&' to this parameter.
+ *
+ * @param postargs This parameter points to an area where the return value
+ * is stored. If 'postargs' is NULL, no value is stored.
+ *
+ * @param method specify the signature method to use. It is of type 
+ * \ref OAuthMethod and most likely \ref OA_HMAC.
+ *
+ * @param http_method The HTTP request method to use (ie "GET", "PUT",..)
+ * If NULL is given as 'http_method' this defaults to "GET" when 
+ * 'postargs' is also NULL and when postargs is not NULL "POST" is used.
+ *
+ * @param c_key consumer key
+ * @param c_secret consumer secret
+ * @param t_key token key
+ * @param t_secret token secret
+ *
+ * @return the signed url or NULL if an error occurred.
+ *
+ */
+std::string oauth_sign_url2 (const char *url, std::string *postargs, 
+  OAuthMethod method, 
+  const char *http_method, //< HTTP request method
+  const char *c_key, //< consumer key - posted plain text
+  const char *c_secret, //< consumer secret - used as 1st part of secret-key 
+  const char *t_key, //< token key - posted plain text in URL
+  const char *t_secret //< token secret - used as 2st part of secret-key
+  );
+
+/**
+ * @deprecated Use oauth_sign_url2() instead.
+ */
+std::string oauth_sign_url (const char *url, std::string *postargs, 
+  OAuthMethod method, 
+  const char *c_key, //< consumer key - posted plain text
+  const char *c_secret, //< consumer secret - used as 1st part of secret-key 
+  const char *t_key, //< token key - posted plain text in URL
+  const char *t_secret //< token secret - used as 2st part of secret-key
+  ) attribute_deprecated;
+
+
+/**
+ * the back-end behind by /ref oauth_sign_array2.
+ * however it does not serialize the signed URL again.
+ * The user needs to call /ref oauth_serialize_url (oA)
+ * and /ref oauth_free_array to do so.
+ *
+ * This allows to split parts of the URL to be used for
+ * OAuth HTTP Authorization header:
+ * see http://oauth.net/core/1.0a/#consumer_req_param
+ * the oauthtest2 example code does so.
+ * 
+ *
+ * @param argcp pointer to array length int
+ * @param argvp pointer to array values  
+ * (argv[0]="http://example.org:80/" argv[1]="first=QueryParamater" ..
+ *  the array is modified: fi. oauth_ parameters are added)
+ *  These arrays can be generated with /ref oauth_split_url_parameters
+ *  or /ref oauth_split_post_paramters.
+ *
+ * @param postargs This parameter points to an area where the return value
+ * is stored. If 'postargs' is NULL, no value is stored.
+ *
+ * @param method specify the signature method to use. It is of type 
+ * \ref OAuthMethod and most likely \ref OA_HMAC.
+ *
+ * @param http_method The HTTP request method to use (ie "GET", "PUT",..)
+ * If NULL is given as 'http_method' this defaults to "GET" when 
+ * 'postargs' is also NULL and when postargs is not NULL "POST" is used.
+ *
+ * @param c_key consumer key
+ * @param c_secret consumer secret
+ * @param t_key token key
+ * @param t_secret token secret
+ *
+ * @return void
+ *
+ */
+void oauth_sign_array2_process (std::vector<std::string> *argvp,
+  std::string *postargs,
+  OAuthMethod method, 
+  const char *http_method, //< HTTP request method
+  const char *c_key, //< consumer key - posted plain text
+  const char *c_secret, //< consumer secret - used as 1st part of secret-key 
+  const char *t_key, //< token key - posted plain text in URL
+  const char *t_secret //< token secret - used as 2st part of secret-key
+  );
+
+/**
+ * same as /ref oauth_sign_url
+ * with the url already split into parameter array 
+ *
+ * @param argcp pointer to array length int
+ * @param argvp pointer to array values  
+ * (argv[0]="http://example.org:80/" argv[1]="first=QueryParamater" ..
+ *  the array is modified: fi. oauth_ parameters are added)
+ *  These arrays can be generated with /ref oauth_split_url_parameters
+ *  or /ref oauth_split_post_paramters.
+ *
+ * @param postargs This parameter points to an area where the return value
+ * is stored. If 'postargs' is NULL, no value is stored.
+ *
+ * @param method specify the signature method to use. It is of type 
+ * \ref OAuthMethod and most likely \ref OA_HMAC.
+ *
+ * @param http_method The HTTP request method to use (ie "GET", "PUT",..)
+ * If NULL is given as 'http_method' this defaults to "GET" when 
+ * 'postargs' is also NULL and when postargs is not NULL "POST" is used.
+ *
+ * @param c_key consumer key
+ * @param c_secret consumer secret
+ * @param t_key token key
+ * @param t_secret token secret
+ *
+ * @return the signed url or NULL if an error occurred.
+ */
+std::string oauth_sign_array2 (std::vector<std::string> *argvp,
+  std::string *postargs,
+  OAuthMethod method, 
+  const char *http_method, //< HTTP request method
+  const char *c_key, //< consumer key - posted plain text
+  const char *c_secret, //< consumer secret - used as 1st part of secret-key 
+  const char *t_key, //< token key - posted plain text in URL
+  const char *t_secret //< token secret - used as 2st part of secret-key
+  );
+
+/**
+ * @deprecated Use oauth_sign_array2() instead.
+ */
+char *oauth_sign_array(
+    std::vector<std::string> *argvp,
+    char **postargs,
+    OAuthMethod method, 
+    const char *c_key, //< consumer key - posted plain text
+    const char *c_secret, //< consumer secret - used as 1st part of secret-key 
+    const char *t_key, //< token key - posted plain text in URL
+    const char *t_secret //< token secret - used as 2st part of secret-key
+    ) attribute_deprecated;
+
+/**
+ * do a HTTP POST request, wait for it to finish 
+ * and return the content of the reply.
+ * (requires libcurl or a command-line HTTP client)
+ *
+ * If compiled <b>without</b> libcurl this function calls
+ * a command-line executable defined in the environment variable
+ * OAUTH_HTTP_CMD - it defaults to 
+ * <tt>curl -sA 'liboauth-agent/0.1' -d '%%p' '%%u'</tt>
+ * where %%p is replaced with the postargs and %%u is replaced with 
+ * the URL. 
+ *
+ * bash & wget example:
+ * <tt>export OAUTH_HTTP_CMD="wget -q -U 'liboauth-agent/0.1' --post-data='%p' '%u' "</tt>
+ *
+ * NOTE: This function uses the curl's default HTTP-POST Content-Type:
+ * application/x-www-form-urlencoded which is the only option allowed
+ * by oauth core 1.0 spec. Experimental code can use the Environment variable
+ * to transmit custom HTTP headers or parameters.
+ *
+ * WARNING: this is a tentative function. it's convenient and handy for testing
+ * or developing OAuth code. But don't rely on this function
+ * to become a stable part of this API. It does not do 
+ * much error checking for one thing..
+ *
+ * @param u url to query
+ * @param p postargs to send along with the HTTP request.
+ * @return replied content from HTTP server. needs to be freed by caller.
+ */
+std::string oauth_http_post(const char *u, const char *p);
+
+#endif

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/oauth_http.cpp	Wed Mar 23 19:53:42 2011 +0000
@@ -0,0 +1,61 @@
+/*
+ * OAuth http functions in POSIX-C.
+ *
+ * Copyright 2007, 2008, 2009, 2010 Robin Gareus <robin@gareus.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "oauth.h"
+
+#include <HTTPClient.h>
+
+/* wrapper functions */
+
+/**
+ * do a HTTP POST request, wait for it to finish 
+ * and return the content of the reply.
+ * (requires libcurl or a command-line HTTP client)
+ *
+ * more documentation in oauth.h
+ *
+ * @param u url to query
+ * @param p postargs to send along with the HTTP request.
+ * @return  In case of an error NULL is returned; otherwise a pointer to the
+ * replied content from HTTP server. latter needs to be freed by caller.
+ */
+std::string oauth_http_post(const char *u, const char *p)
+{
+    HTTPClient http;
+    HTTPText req("application/x-www-form-urlencoded");
+    HTTPText res;
+    req.set(p);
+    http.post(u, req, &res);
+    return res.get();
+}
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sha1.c	Wed Mar 23 19:53:42 2011 +0000
@@ -0,0 +1,385 @@
+/*
+ *  sha1.c
+ *
+ *  Description:
+ *      This file implements the Secure Hashing Algorithm 1 as
+ *      defined in FIPS PUB 180-1 published April 17, 1995.
+ *
+ *      The SHA-1, produces a 160-bit message digest for a given
+ *      data stream.  It should take about 2**n steps to find a
+ *      message with the same digest as a given message and
+ *      2**(n/2) to find any two messages with the same digest,
+ *      when n is the digest size in bits.  Therefore, this
+ *      algorithm can serve as a means of providing a
+ *      "fingerprint" for a message.
+ *
+ *  Portability Issues:
+ *      SHA-1 is defined in terms of 32-bit "words".  This code
+ *      uses <stdint.h> (included via "sha1.h" to define 32 and 8
+ *      bit unsigned integer types.  If your C compiler does not
+ *      support 32 bit unsigned integers, this code is not
+ *      appropriate.
+ *
+ *  Caveats:
+ *      SHA-1 is designed to work with messages less than 2^64 bits
+ *      long.  Although SHA-1 allows a message digest to be generated
+ *      for messages of any number of bits less than 2^64, this
+ *      implementation only works with messages with a length that is
+ *      a multiple of the size of an 8-bit character.
+ *
+ */
+
+#include "sha1.h"
+
+
+/*
+ *  Define the SHA1 circular left shift macro
+ */
+#define SHA1CircularShift(bits,word) \
+                (((word) << (bits)) | ((word) >> (32-(bits))))
+
+/* Local Function Prototyptes */
+void SHA1PadMessage(SHA1Context *);
+void SHA1ProcessMessageBlock(SHA1Context *);
+
+/*
+ *  SHA1Reset
+ *
+ *  Description:
+ *      This function will initialize the SHA1Context in preparation
+ *      for computing a new SHA1 message digest.
+ *
+ *  Parameters:
+ *      context: [in/out]
+ *          The context to reset.
+ *
+ *  Returns:
+ *      sha Error Code.
+ *
+ */
+int SHA1Reset(SHA1Context *context)
+{
+    if (!context)
+    {
+        return shaNull;
+    }
+
+    context->Length_Low             = 0;
+    context->Length_High            = 0;
+    context->Message_Block_Index    = 0;
+
+    context->Intermediate_Hash[0]   = 0x67452301;
+    context->Intermediate_Hash[1]   = 0xEFCDAB89;
+    context->Intermediate_Hash[2]   = 0x98BADCFE;
+    context->Intermediate_Hash[3]   = 0x10325476;
+    context->Intermediate_Hash[4]   = 0xC3D2E1F0;
+
+    context->Computed   = 0;
+    context->Corrupted  = 0;
+
+    return shaSuccess;
+}
+
+/*
+ *  SHA1Result
+ *
+ *  Description:
+ *      This function will return the 160-bit message digest into the
+ *      Message_Digest array  provided by the caller.
+ *      NOTE: The first octet of hash is stored in the 0th element,
+ *            the last octet of hash in the 19th element.
+ *
+ *  Parameters:
+ *      context: [in/out]
+ *          The context to use to calculate the SHA-1 hash.
+ *      Message_Digest: [out]
+ *          Where the digest is returned.
+ *
+ *  Returns:
+ *      sha Error Code.
+ *
+ */
+int SHA1Result( SHA1Context *context,
+                uint8_t Message_Digest[SHA1HashSize])
+{
+    int i;
+
+    if (!context || !Message_Digest)
+    {
+        return shaNull;
+    }
+
+    if (context->Corrupted)
+    {
+        return context->Corrupted;
+    }
+
+    if (!context->Computed)
+    {
+        SHA1PadMessage(context);
+        for(i=0; i<64; ++i)
+        {
+            /* message may be sensitive, clear it out */
+            context->Message_Block[i] = 0;
+        }
+        context->Length_Low = 0;    /* and clear length */
+        context->Length_High = 0;
+        context->Computed = 1;
+    }
+
+    for(i = 0; i < SHA1HashSize; ++i)
+    {
+        Message_Digest[i] = context->Intermediate_Hash[i>>2] >> 8 * ( 3 - ( i & 0x03 ) );
+    }
+
+    return shaSuccess;
+}
+
+/*
+ *  SHA1Input
+ *
+ *  Description:
+ *      This function accepts an array of octets as the next portion
+ *      of the message.
+ *
+ *  Parameters:
+ *      context: [in/out]
+ *          The SHA context to update
+ *      message_array: [in]
+ *          An array of characters representing the next portion of
+ *          the message.
+ *      length: [in]
+ *          The length of the message in message_array
+ *
+ *  Returns:
+ *      sha Error Code.
+ *
+ */
+int SHA1Input(    SHA1Context    *context,
+                  const uint8_t  *message_array,
+                  unsigned       length)
+{
+    if (!length)
+    {
+        return shaSuccess;
+    }
+
+    if (!context || !message_array)
+    {
+        return shaNull;
+    }
+
+    if (context->Computed)
+    {
+        context->Corrupted = shaStateError;
+        return shaStateError;
+    }
+
+    if (context->Corrupted)
+    {
+         return context->Corrupted;
+    }
+    while(length-- && !context->Corrupted)
+    {
+    context->Message_Block[context->Message_Block_Index++] =
+                    (*message_array & 0xFF);
+
+    context->Length_Low += 8;
+    if (context->Length_Low == 0)
+    {
+        context->Length_High++;
+        if (context->Length_High == 0)
+        {
+            /* Message is too long */
+            context->Corrupted = 1;
+        }
+    }
+
+    if (context->Message_Block_Index == 64)
+    {
+        SHA1ProcessMessageBlock(context);
+    }
+
+    message_array++;
+    }
+
+    return shaSuccess;
+}
+
+/*
+ *  SHA1ProcessMessageBlock
+ *
+ *  Description:
+ *      This function will process the next 512 bits of the message
+ *      stored in the Message_Block array.
+ *
+ *  Parameters:
+ *      None.
+ *
+ *  Returns:
+ *      Nothing.
+ *
+ *  Comments:
+ *      Many of the variable names in this code, especially the
+ *      single character names, were used because those were the
+ *      names used in the publication.
+ *
+ *
+ */
+void SHA1ProcessMessageBlock(SHA1Context *context)
+{
+    const uint32_t K[] =    {       /* Constants defined in SHA-1   */
+                            0x5A827999,
+                            0x6ED9EBA1,
+                            0x8F1BBCDC,
+                            0xCA62C1D6
+                            };
+    int           t;                 /* Loop counter                */
+    uint32_t      temp;              /* Temporary word value        */
+    uint32_t      W[80];             /* Word sequence               */
+    uint32_t      A, B, C, D, E;     /* Word buffers                */
+
+    /*
+     *  Initialize the first 16 words in the array W
+     */
+    for(t = 0; t < 16; t++)
+    {
+        W[t] = context->Message_Block[t * 4] << 24;
+        W[t] |= context->Message_Block[t * 4 + 1] << 16;
+        W[t] |= context->Message_Block[t * 4 + 2] << 8;
+        W[t] |= context->Message_Block[t * 4 + 3];
+    }
+
+    for(t = 16; t < 80; t++)
+    {
+       W[t] = SHA1CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
+    }
+
+    A = context->Intermediate_Hash[0];
+    B = context->Intermediate_Hash[1];
+    C = context->Intermediate_Hash[2];
+    D = context->Intermediate_Hash[3];
+    E = context->Intermediate_Hash[4];
+
+    for(t = 0; t < 20; t++)
+    {
+        temp =  SHA1CircularShift(5,A) +
+                ((B & C) | ((~B) & D)) + E + W[t] + K[0];
+        E = D;
+        D = C;
+        C = SHA1CircularShift(30,B);
+        B = A;
+        A = temp;
+    }
+
+    for(t = 20; t < 40; t++)
+    {
+        temp = SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[1];
+        E = D;
+        D = C;
+        C = SHA1CircularShift(30,B);
+        B = A;
+        A = temp;
+    }
+
+    for(t = 40; t < 60; t++)
+    {
+        temp = SHA1CircularShift(5,A) +
+               ((B & C) | (B & D) | (C & D)) + E + W[t] + K[2];
+        E = D;
+        D = C;
+        C = SHA1CircularShift(30,B);
+        B = A;
+        A = temp;
+    }
+
+    for(t = 60; t < 80; t++)
+    {
+        temp = SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[3];
+        E = D;
+        D = C;
+        C = SHA1CircularShift(30,B);
+        B = A;
+        A = temp;
+    }
+
+    context->Intermediate_Hash[0] += A;
+    context->Intermediate_Hash[1] += B;
+    context->Intermediate_Hash[2] += C;
+    context->Intermediate_Hash[3] += D;
+    context->Intermediate_Hash[4] += E;
+
+    context->Message_Block_Index = 0;
+}
+
+
+/*
+ *  SHA1PadMessage
+ *
+ *  Description:
+ *      According to the standard, the message must be padded to an even
+ *      512 bits.  The first padding bit must be a '1'.  The last 64
+ *      bits represent the length of the original message.  All bits in
+ *      between should be 0.  This function will pad the message
+ *      according to those rules by filling the Message_Block array
+ *      accordingly.  It will also call the ProcessMessageBlock function
+ *      provided appropriately.  When it returns, it can be assumed that
+ *      the message digest has been computed.
+ *
+ *  Parameters:
+ *      context: [in/out]
+ *          The context to pad
+ *      ProcessMessageBlock: [in]
+ *          The appropriate SHA*ProcessMessageBlock function
+ *  Returns:
+ *      Nothing.
+ *
+ */
+
+void SHA1PadMessage(SHA1Context *context)
+{
+    /*
+     *  Check to see if the current message block is too small to hold
+     *  the initial padding bits and length.  If so, we will pad the
+     *  block, process it, and then continue padding into a second
+     *  block.
+     */
+    if (context->Message_Block_Index > 55)
+    {
+        context->Message_Block[context->Message_Block_Index++] = 0x80;
+        while(context->Message_Block_Index < 64)
+        {
+            context->Message_Block[context->Message_Block_Index++] = 0;
+        }
+
+        SHA1ProcessMessageBlock(context);
+
+        while(context->Message_Block_Index < 56)
+        {
+            context->Message_Block[context->Message_Block_Index++] = 0;
+        }
+    }
+    else
+    {
+        context->Message_Block[context->Message_Block_Index++] = 0x80;
+        while(context->Message_Block_Index < 56)
+        {
+            context->Message_Block[context->Message_Block_Index++] = 0;
+        }
+    }
+
+    /*
+     *  Store the message length as the last 8 octets
+     */
+    context->Message_Block[56] = context->Length_High >> 24;
+    context->Message_Block[57] = context->Length_High >> 16;
+    context->Message_Block[58] = context->Length_High >> 8;
+    context->Message_Block[59] = context->Length_High;
+    context->Message_Block[60] = context->Length_Low >> 24;
+    context->Message_Block[61] = context->Length_Low >> 16;
+    context->Message_Block[62] = context->Length_Low >> 8;
+    context->Message_Block[63] = context->Length_Low;
+
+    SHA1ProcessMessageBlock(context);
+}
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sha1.h	Wed Mar 23 19:53:42 2011 +0000
@@ -0,0 +1,85 @@
+/*
+ *  sha1.h
+ *
+ *  Description:
+ *      This is the header file for code which implements the Secure
+ *      Hashing Algorithm 1 as defined in FIPS PUB 180-1 published
+ *      April 17, 1995.
+ *
+ *      Many of the variable names in this code, especially the
+ *      single character names, were used because those were the names
+ *      used in the publication.
+ *
+ *      Please read the file sha1.c for more information.
+ *
+ */
+
+#ifndef _SHA1_H_
+#define _SHA1_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+//#include <stdint.h>
+typedef unsigned long uint32_t;
+typedef int int_least16_t;
+typedef unsigned char uint8_t;
+
+/*
+ * If you do not have the ISO standard stdint.h header file, then you
+ * must typdef the following:
+ *    name              meaning
+ *  uint32_t         unsigned 32 bit integer
+ *  uint8_t          unsigned 8 bit integer (i.e., unsigned char)
+ *  int_least16_t    integer of >= 16 bits
+ *
+ */
+
+#ifndef _SHA_enum_
+#define _SHA_enum_
+enum
+{
+    shaSuccess = 0,
+    shaNull,            /* Null pointer parameter */
+    shaInputTooLong,    /* input data too long */
+    shaStateError       /* called Input after Result */
+};
+#endif
+#define SHA1HashSize 20
+
+/*
+ *  This structure will hold context information for the SHA-1
+ *  hashing operation
+ */
+typedef struct SHA1Context
+{
+    uint32_t Intermediate_Hash[SHA1HashSize/4]; /* Message Digest  */
+
+    uint32_t Length_Low;            /* Message length in bits      */
+    uint32_t Length_High;           /* Message length in bits      */
+
+                               /* Index into message block array   */
+    int_least16_t Message_Block_Index;
+    uint8_t Message_Block[64];      /* 512-bit message blocks      */
+
+    int Computed;               /* Is the digest computed?         */
+    int Corrupted;             /* Is the message digest corrupted? */
+} SHA1Context;
+
+/*
+ *  Function Prototypes
+ */
+
+int SHA1Reset(  SHA1Context *);
+int SHA1Input(  SHA1Context *,
+                const uint8_t *,
+                unsigned int);
+int SHA1Result( SHA1Context *,
+                uint8_t Message_Digest[SHA1HashSize]);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif