wardrobe: libwardrobe is a last.fm scrobbling library

14 files changed, 733 insertions, 1 deletions

diff --git a/autogen.sh b/autogen.sh
index a0cb304..caf9b61 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,10 +1,12 @@
 #!/bin/sh
 
-for DIR in . libpiano; do
+for DIR in . libpiano libwardrobe; do
+	echo "autogen in " $DIR
 	cd $DIR
 	libtoolize --force \
 	&& aclocal \
 	&& autoheader \
 	&& automake --add-missing \
 	&& autoconf
+	cd -
 done
diff --git a/libwardrobe/AUTHORS b/libwardrobe/AUTHORS
new file mode 100644
index 0000000..54a9887
--- /dev/null
+++ b/libwardrobe/AUTHORS
@@ -0,0 +1,2 @@
+Main code:
+	Lars-Dominik Braun <PromyLOPh@gmail.com>
diff --git a/libwardrobe/COPYING b/libwardrobe/COPYING
new file mode 100644
index 0000000..ce56cec
--- /dev/null
+++ b/libwardrobe/COPYING
@@ -0,0 +1,19 @@
+Copyright (c) 2008 Lars-Dominik Braun
+
+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.
diff --git a/libwardrobe/ChangeLog b/libwardrobe/ChangeLog
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/libwardrobe/ChangeLog
diff --git a/libwardrobe/INSTALL b/libwardrobe/INSTALL
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/libwardrobe/INSTALL
diff --git a/libwardrobe/Makefile.am b/libwardrobe/Makefile.am
new file mode 100644
index 0000000..af437a6
--- /dev/null
+++ b/libwardrobe/Makefile.am
@@ -0,0 +1 @@
+SUBDIRS = src
diff --git a/libwardrobe/NEWS b/libwardrobe/NEWS
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/libwardrobe/NEWS
diff --git a/libwardrobe/README b/libwardrobe/README
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/libwardrobe/README
diff --git a/libwardrobe/configure.in b/libwardrobe/configure.in
new file mode 100644
index 0000000..55ec57e
--- /dev/null
+++ b/libwardrobe/configure.in
@@ -0,0 +1,20 @@
+AC_INIT([libwardrobe], [0.1], [PromyLOPh@gmail.com])
+AC_CONFIG_AUX_DIR([.])
+AC_CONFIG_SRCDIR([src/main.c])
+AM_CONFIG_HEADER([src/config.h])
+AM_INIT_AUTOMAKE([-Wall])
+
+AC_PROG_CC
+AM_PROG_CC_C_O
+AM_SANITY_CHECK
+AM_PROG_LIBTOOL
+
+PKG_PROG_PKG_CONFIG
+
+PKG_CHECK_MODULES(LIBCURL, libcurl >= 7.18.0)
+AC_SUBST(LIBCURL_CFLAGS)
+AC_SUBST(LIBCURL_LIBS)
+
+AC_CONFIG_FILES(Makefile src/Makefile)
+
+AC_OUTPUT
diff --git a/libwardrobe/src/Makefile.am b/libwardrobe/src/Makefile.am
new file mode 100644
index 0000000..470635a
--- /dev/null
+++ b/libwardrobe/src/Makefile.am
@@ -0,0 +1,6 @@
+lib_LTLIBRARIES = libwardrobe.la
+
+libwardrobe_la_SOURCES = main.c md5.c md5.h
+include_HEADERS = wardrobe.h
+libwardrobe_la_CPPFLAGS = ${LIBCURL_CFLAGS}
+libwardrobe_la_LIBADD = ${LIBCURL_LIBS}
diff --git a/libwardrobe/src/main.c b/libwardrobe/src/main.c
new file mode 100644
index 0000000..f188d46
--- /dev/null
+++ b/libwardrobe/src/main.c
@@ -0,0 +1,310 @@
+/*
+Copyright (c) 2008 Lars-Dominik Braun
+
+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.
+*/
+
+#include <time.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <curl/curl.h>
+
+#include "md5.h"
+
+typedef struct {
+	char *user;
+	char *password;
+	char authToken[100];
+	char postUrl[1024];
+	CURL *ch;
+} WardrobeHandle_t;
+
+typedef struct {
+	char *artist;
+	char *title;
+	time_t started;
+	time_t length;
+} WardrobeSong_t;
+
+typedef enum {WARDROBE_RET_ERR, WARDROBE_RET_OK,
+		WARDROBE_RET_CLIENT_BANNED, WARDROBE_RET_BADAUTH,
+		WARDROBE_RET_BADTIME, WARDROBE_RET_BADSESSION} WardrobeReturn_t;
+
+#define WARDROBE_HTTP_BUFFER_SIZE 10000
+
+void WardrobeSongInit (WardrobeSong_t *ws) {
+	memset (ws, 0, sizeof (*ws));
+}
+
+/*	callback for curl, writes data to buffer
+ *	@param received data
+ *	@param block size
+ *	@param blocks received
+ *	@param write data into this buffer
+ *	@return written bytes
+ */
+size_t WardrobeCurlRetToVar (void *ptr, size_t size, size_t nmemb,
+		void *stream) {
+	char *charPtr = ptr;
+	char *streamPtr = stream;
+
+	if (strlen (streamPtr) + nmemb > WARDROBE_HTTP_BUFFER_SIZE) {
+		printf ("buffer overflow...\n");
+		return 0;
+	} else {
+		memcpy (streamPtr+strlen(streamPtr), charPtr, size*nmemb);
+		return size*nmemb;
+	}
+}
+
+/*	receive data from url using GET method
+ *	@param initialized curl handle
+ *	@param call this url
+ *	@param put received data here, memory is allocated by this function
+ *	@return nothing yet
+ */
+void WardrobeHttpGet (CURL *ch, char *url, char **retData) {
+	/* Let's hope nothing will be bigger than this... */
+	char curlRet[WARDROBE_HTTP_BUFFER_SIZE];
+
+	memset (curlRet, 0, sizeof (curlRet));
+
+	curl_easy_setopt (ch, CURLOPT_URL, url);
+	curl_easy_setopt (ch, CURLOPT_WRITEFUNCTION, WardrobeCurlRetToVar);
+	curl_easy_setopt (ch, CURLOPT_WRITEDATA, curlRet);
+
+	curl_easy_perform (ch);
+
+	*retData = strdup (curlRet);
+}
+
+/*	post data to url and receive answer as string
+ *	@param initialized curl handle
+ *	@param call this url
+ *	@param post this data
+ *	@param put received data here, memory is allocated by this function
+ *	@return nothing yet
+ */
+void WardrobeHttpPost (CURL *ch, char *url, char *postData, char **retData) {
+	/* Let's hope nothing will be bigger than this... */
+	char curlRet[WARDROBE_HTTP_BUFFER_SIZE];
+
+	memset (curlRet, 0, sizeof (curlRet));
+	curl_easy_setopt (ch, CURLOPT_URL, url);
+	curl_easy_setopt (ch, CURLOPT_POSTFIELDS, postData);
+	curl_easy_setopt (ch, CURLOPT_WRITEFUNCTION, WardrobeCurlRetToVar);
+	curl_easy_setopt (ch, CURLOPT_WRITEDATA, curlRet);
+
+	curl_easy_perform (ch);
+
+	*retData = strdup (curlRet);
+}
+
+/*	initialize wardrobe handle (setup curl, e.g.)
+ *	@param wardrobe handle
+ */
+void WardrobeInit (WardrobeHandle_t *wh) {
+	memset (wh, 0, sizeof (*wh));
+	wh->ch = curl_easy_init ();
+}
+
+/*	free () replacement that does some checks and zeros memory
+ *	@param pointer
+ *	@param size or 0 to disable zeroing
+ */
+void WardrobeFree (void *ptr, size_t size) {
+	if (ptr != NULL) {
+		if (size > 0) {
+			memset (ptr, 0, size);
+		}
+		free (ptr);
+	}
+}
+
+/*	cleanup song
+ *	@param song
+ */
+void WardrobeSongDestroy (WardrobeSong_t *ws) {
+	WardrobeFree (ws->artist, 0);
+	WardrobeFree (ws->title, 0);
+	memset (ws, 0, sizeof (*ws));
+}
+
+/*	cleanup wardrobe handle
+ *	@param initialized wardrobe handle
+ */
+void WardrobeDestroy (WardrobeHandle_t *wh) {
+	WardrobeFree (wh->user, 0);
+	WardrobeFree (wh->password, 0);
+	curl_easy_cleanup (wh->ch);
+	memset (wh, 0, sizeof (*wh));
+}
+
+/*	get session id from last.fm; you don't have to call this manually
+ *	@param wardrobe handle
+ *	@return _OK or error
+ */
+WardrobeReturn_t WardrobeHandshake (WardrobeHandle_t *wh) {
+	/* we'll use gmt */
+	time_t currTime = time (NULL);
+	time_t currGmTime = mktime (gmtime (&currTime));
+	char url[1024], tmp[100], *tmpDigest, *pwDigest, *ret;
+	WardrobeReturn_t fRet = WARDROBE_RET_ERR;
+
+	tmpDigest = WardrobeMd5Calc (wh->password);
+	snprintf (tmp, sizeof (tmp), "%s%li", tmpDigest, currGmTime);
+	pwDigest = WardrobeMd5Calc (tmp);
+	snprintf (url, sizeof (url), "http://post.audioscrobbler.com/"
+			"?hs=true&p=1.2&c=tst&v=1.0&u=%s&t=%li&a=%s", wh->user,
+			currGmTime, pwDigest);
+	
+	WardrobeHttpGet (wh->ch, url, &ret);
+
+	/* parse answer */
+	if (memcmp (ret, "OK", 2) == 0) {
+		char *newlines[5];
+		size_t i;
+		newlines[0] = ret;
+		/* split string */
+		for (i = 1; i < sizeof (newlines) / sizeof (*newlines); i++) {
+			newlines[i] = strchr (newlines[i-1]+1, '\n');
+		}
+		/* copy needed values */
+		if (newlines[2] - newlines[1]-1 < sizeof (wh->authToken)) {
+			memcpy (wh->authToken, newlines[1]+1, newlines[2] -
+					newlines[1]-1);
+		} else {
+			printf ("buffer overflow!\n");
+		}
+		if (newlines[4] - newlines[3]-1 < sizeof (wh->postUrl)) {
+			memcpy (wh->postUrl, newlines[3]+1, newlines[4] -
+					newlines[3]-1);
+		} else {
+			printf ("buffer overflow!\n");
+		}
+		fRet = WARDROBE_RET_OK;
+	} else if (memcmp (ret, "BADAUTH", 7) == 0) {
+		fRet = WARDROBE_RET_BADAUTH;
+	} else if (memcmp (ret, "BADTIME", 7) == 0) {
+		fRet = WARDROBE_RET_BADTIME;
+	} else if (memcmp (ret, "BANNED", 6) == 0) {
+		fRet = WARDROBE_RET_CLIENT_BANNED;
+	}
+
+	WardrobeFree (tmpDigest, WARDROBE_MD5_DIGEST_LEN);
+	WardrobeFree (pwDigest, WARDROBE_MD5_DIGEST_LEN);
+	WardrobeFree (ret, 0);
+
+	return fRet;
+}
+
+/*	_really_ submit song to last.fm
+ *	@param wardrobe handle
+ *	@param song
+ *	@return _OK or error
+ */
+WardrobeReturn_t WardrobeSendSong (WardrobeHandle_t *wh,
+		WardrobeSong_t *ws) {
+	char postContent[10000];
+	char *urlencArtist, *urlencTitle, *ret;
+	WardrobeReturn_t fRet = WARDROBE_RET_ERR;
+
+	urlencArtist = curl_easy_escape (wh->ch, ws->artist, 0);
+	urlencTitle = curl_easy_escape (wh->ch, ws->title, 0);
+
+	snprintf (postContent, sizeof (postContent), "s=%s&a[0]=%s&t[0]=%s&"
+			"i[0]=%li&o[0]=P&r[0]=&l[0]=%li&b[0]=&n[0]=&m[0]=",
+			wh->authToken, urlencArtist, urlencTitle, ws->started,
+			ws->length);
+
+	WardrobeHttpPost (wh->ch, wh->postUrl, postContent, &ret);
+	if (memcmp (ret, "OK", 2) == 0) {
+		fRet = WARDROBE_RET_OK;
+	} else if (memcmp (ret, "BADSESSION", 10) == 0) {
+		fRet = WARDROBE_RET_BADSESSION;
+	}
+
+	curl_free (urlencArtist);
+	curl_free (urlencTitle);
+	WardrobeFree (ret, 0);
+
+	return fRet;
+}
+
+/*	submit played track to last.fm
+ *	@public yes
+ *	@param wardrobe handle
+ *	@param song data
+ *	@return _OK or error
+ */
+WardrobeReturn_t WardrobeSubmit (WardrobeHandle_t *wh,
+		WardrobeSong_t *ws) {
+	size_t i;
+	WardrobeReturn_t fRet = WARDROBE_RET_ERR;
+
+	if (strlen (wh->authToken) <= 0 && (fRet = WardrobeHandshake (wh)) !=
+			WARDROBE_RET_OK) {
+		return fRet;
+	}
+	for (i = 0; i < 2; i++) {
+		fRet = WardrobeSendSong (wh, ws);
+		if (fRet == WARDROBE_RET_OK) {
+			return WARDROBE_RET_OK;
+		} else if (fRet == WARDROBE_RET_BADSESSION &&
+				(fRet = WardrobeHandshake (wh)) != WARDROBE_RET_OK) {
+			return fRet;
+		}
+	}
+	return fRet;
+}
+
+/*	return dynamic allocated error string, don't forget to free it
+ *	@param error int
+ *	@return human readable error string or NULL on error
+ */
+char *WardrobeErrorToString (WardrobeReturn_t ret) {
+	switch (ret) {
+		case WARDROBE_RET_ERR:
+			return strdup ("Unknown error.\n");
+			break;
+
+		case WARDROBE_RET_OK:
+			return strdup ("Everything's fine :)\n");
+			break;
+
+		case WARDROBE_RET_CLIENT_BANNED:
+			return strdup ("Client banned. Try to update your software.\n");
+			break;
+			
+		case WARDROBE_RET_BADAUTH:
+			return strdup ("Wrong username or password.\n");
+			break;
+		
+		case WARDROBE_RET_BADTIME:
+			return strdup ("System time wrong. Check your system time and "
+					"correct it.\n");
+			break;
+		
+		case WARDROBE_RET_BADSESSION:
+			return strdup ("Bad session. Try to login again.\n");
+			break;
+	}
+	return NULL;
+}
diff --git a/libwardrobe/src/md5.c b/libwardrobe/src/md5.c
new file mode 100644
index 0000000..d41b5c9
--- /dev/null
+++ b/libwardrobe/src/md5.c
@@ -0,0 +1,316 @@
+/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
+rights reserved.
+
+License to copy and use this software is granted provided that it
+is identified as the "RSA Data Security, Inc. MD5 Message-Digest
+Algorithm" in all material mentioning or referencing this software
+or this function.
+
+License is also granted to make and use derivative works provided
+that such works are identified as "derived from the RSA Data
+Security, Inc. MD5 Message-Digest Algorithm" in all material
+mentioning or referencing the derived work.
+
+RSA Data Security, Inc. makes no representations concerning either
+the merchantability of this software or the suitability of this
+software for any particular purpose. It is provided "as is"
+without express or implied warranty of any kind.
+
+These notices must be retained in any copies of any part of this
+documentation and/or software.
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "md5.h"
+
+/* Constants for MD5Transform routine. */
+#define S11 7
+#define S12 12
+#define S13 17
+#define S14 22
+#define S21 5
+#define S22 9
+#define S23 14
+#define S24 20
+#define S31 4
+#define S32 11
+#define S33 16
+#define S34 23
+#define S41 6
+#define S42 10
+#define S43 15
+#define S44 21
+
+/* MD5 context. */
+typedef struct {
+	unsigned long int state[4]; /* state (ABCD) */
+	unsigned long int count[2]; /* number of bits, modulo 2^64 (lsb first) */
+	unsigned char buffer[64]; /* input buffer */
+} MD5_CTX;
+
+void MD5Init (MD5_CTX *);
+void MD5Update (MD5_CTX *, unsigned char *, unsigned int);
+void MD5Final (unsigned char [16], MD5_CTX *);
+
+static void MD5Transform (unsigned long int [4], unsigned char [64]);
+static void Encode (unsigned char *, unsigned long int *, unsigned int);
+static void Decode (unsigned long int *, unsigned char *, unsigned int);
+
+static unsigned char 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
+};
+
+/* F, G, H and I are basic MD5 functions. */
+#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
+#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
+#define H(x, y, z) ((x) ^ (y) ^ (z))
+#define I(x, y, z) ((y) ^ ((x) | (~z)))
+
+/* ROTATE_LEFT rotates x left n bits. */
+#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
+
+/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
+Rotation is separate from addition to prevent recomputation.
+ */
+#define FF(a, b, c, d, x, s, ac) { \
+ (a) += F ((b), (c), (d)) + (x) + (unsigned long int)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+#define GG(a, b, c, d, x, s, ac) { \
+ (a) += G ((b), (c), (d)) + (x) + (unsigned long int)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+#define HH(a, b, c, d, x, s, ac) { \
+ (a) += H ((b), (c), (d)) + (x) + (unsigned long int)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+#define II(a, b, c, d, x, s, ac) { \
+ (a) += I ((b), (c), (d)) + (x) + (unsigned long int)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+
+/*	MD5 initialization. Begins an MD5 operation, writing a new context.
+ *	@param context
+ */
+void MD5Init (MD5_CTX *context) {
+	context->count[0] = context->count[1] = 0;
+	/* Load magic initialization constants. */
+	context->state[0] = 0x67452301;
+	context->state[1] = 0xefcdab89;
+	context->state[2] = 0x98badcfe;
+	context->state[3] = 0x10325476;
+}
+
+/*	MD5 block update operation. Continues an MD5 message-digest
+ *	operation, processing another message block, and updating the
+ *	context.
+ *	@param context
+ *	@param input block
+ *	@param length of input block
+ */
+void MD5Update (MD5_CTX *context, unsigned char *input,
+		unsigned int inputLen) {
+	unsigned int i, index, partLen;
+
+	/* Compute number of bytes mod 64 */
+	index = (unsigned int)((context->count[0] >> 3) & 0x3F);
+
+	/* Update number of bits */
+	if ((context->count[0] += ((unsigned long int) inputLen << 3)) <
+			((unsigned long int)inputLen << 3)) {
+		context->count[1]++;
+	}
+	context->count[1] += ((unsigned long int) inputLen >> 29);
+
+	partLen = 64 - index;
+
+	/* Transform as many times as possible. */
+	if (inputLen >= partLen) {
+		memcpy (&context->buffer[index], input, partLen);
+		MD5Transform (context->state, context->buffer);
+
+		for (i = partLen; i + 63 < inputLen; i += 64) {
+			MD5Transform (context->state, &input[i]);
+		}
+
+		index = 0;
+	} else {
+		i = 0;
+	}
+
+	/* Buffer remaining input */
+	memcpy (&context->buffer[index], &input[i], inputLen-i);
+}
+
+/*	MD5 finalization. Ends an MD5 message-digest operation, writing the
+ *	the message digest and zeroizing the context.
+ *	@param message digest
+ *	@param context
+ */
+void MD5Final (unsigned char digest[16], MD5_CTX *context) {
+	unsigned char bits[8];
+	unsigned int index, padLen;
+
+	/* Save number of bits */
+	Encode (bits, context->count, 8);
+
+	/* Pad out to 56 mod 64. */
+	index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
+	padLen = (index < 56) ? (56 - index) : (120 - index);
+	MD5Update (context, PADDING, padLen);
+
+	/* Append length (before padding) */
+	MD5Update (context, bits, 8);
+	/* Store state in digest */
+	Encode (digest, context->state, 16);
+
+	/* Zeroize sensitive information. */
+	memset (context, 0, sizeof (*context));
+}
+
+/* MD5 basic transformation. Transforms state based on block. */
+static void MD5Transform (unsigned long int state[4],
+		unsigned char block[64]) {
+	unsigned long int a = state[0], b = state[1], c = state[2],
+			d = state[3], x[16];
+
+	Decode (x, block, 64);
+
+  /* Round 1 */
+  FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
+  FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
+  FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
+  FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
+  FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
+  FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
+  FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
+  FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
+  FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
+  FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
+  FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
+  FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
+  FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
+  FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
+  FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
+  FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
+
+ /* Round 2 */
+  GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
+  GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
+  GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
+  GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
+  GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
+  GG (d, a, b, c, x[10], S22,  0x2441453); /* 22 */
+  GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
+  GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
+  GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
+  GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
+  GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
+
+  GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
+  GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
+  GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
+  GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
+  GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
+
+  /* Round 3 */
+  HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
+  HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
+  HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
+  HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
+  HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
+  HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
+  HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
+  HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
+  HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
+  HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
+  HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
+  HH (b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
+  HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
+  HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
+  HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
+  HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
+
+  /* Round 4 */
+  II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
+  II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
+  II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
+  II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
+  II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
+  II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
+  II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
+  II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
+  II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
+  II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
+  II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
+  II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
+  II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
+  II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
+  II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
+  II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
+
+
+	state[0] += a;
+	state[1] += b;
+	state[2] += c;
+	state[3] += d;
+
+	/* Zeroize sensitive information. */
+	memset (x, 0, sizeof (x));
+}
+
+/*	Encodes input (UINT4) into output (unsigned char). Assumes len is
+ *	a multiple of 4.
+ */
+static void Encode (unsigned char *output, unsigned long int *input,
+		unsigned int len) {
+	unsigned int i, j;
+
+	for (i = 0, j = 0; j < len; i++, j += 4) {
+		output[j] = (unsigned char)(input[i] & 0xff);
+		output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
+		output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
+		output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
+	}
+}
+
+/*	Decodes input (unsigned char) into output (UINT4). Assumes len is
+ *	a multiple of 4.
+ */
+static void Decode (unsigned long int *output, unsigned char *input,
+		unsigned int len) {
+	unsigned int i, j;
+
+	for (i = 0, j = 0; j < len; i++, j += 4) {
+		output[i] = ((unsigned long int)input[j]) |
+				(((unsigned long int)input[j+1]) << 8) |
+				(((unsigned long int)input[j+2]) << 16) |
+				(((unsigned long int)input[j+3]) << 24);
+	}
+}
+
+char *WardrobeMd5Calc (char *string) {
+	MD5_CTX context;
+	unsigned char digest[16];
+	size_t i;
+	char *ret = calloc (WARDROBE_MD5_DIGEST_LEN + 1, sizeof (*ret));
+	
+	MD5Init (&context);
+	MD5Update (&context, (unsigned char *) string, strlen (string));
+	MD5Final (digest, &context);
+
+	for (i = 0; i < 16; i++) {
+		snprintf (ret+i*2, 2 + 1, "%02x", digest[i]);
+	}
+	return ret;
+}
+
diff --git a/libwardrobe/src/md5.h b/libwardrobe/src/md5.h
new file mode 100644
index 0000000..5499524
--- /dev/null
+++ b/libwardrobe/src/md5.h
@@ -0,0 +1,25 @@
+/*
+Copyright (c) 2008 Lars-Dominik Braun
+
+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.
+*/
+
+#define WARDROBE_MD5_DIGEST_LEN 32
+
+char *WardrobeMd5Calc (char *string);
diff --git a/libwardrobe/src/wardrobe.h b/libwardrobe/src/wardrobe.h
new file mode 100644
index 0000000..926f4df
--- /dev/null
+++ b/libwardrobe/src/wardrobe.h
@@ -0,0 +1,31 @@
+/*
+Copyright (c) 2008 Lars-Dominik Braun
+
+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.
+*/
+
+/* public api, not stable yet */
+
+void WardrobeInit (WardrobeHandle_t *wh);
+void WardrobeSongInit (WardrobeSong_t *ws);
+void WardrobeSongDestroy (WardrobeSong_t *ws);
+void WardrobeDestroy (WardrobeHandle_t *wh);
+WardrobeReturn_t WardrobeSubmit (WardrobeHandle_t *wh,
+		WardrobeSong_t *ws);
+char *WardrobeErrorToString (WardrobeReturn_t ret);