diff --git a/Android.mk b/Android.mk
index c8f453a..6d3be1d 100644
--- a/Android.mk
+++ b/Android.mk
@@ -35,7 +35,10 @@
     firmware.c \
     partition.cpp \
     partitionmanager.cpp \
-    mtdutils/mtdutils.c
+    mtdutils/mtdutils.c \
+    twinstall.cpp \
+    twmincrypt/twrsa.c \
+    twmincrypt/twsha.c
 
 ifeq ($(TARGET_RECOVERY_REBOOT_SRC),)
   LOCAL_SRC_FILES += reboot.c
@@ -64,7 +67,7 @@
 LOCAL_SHARED_LIBRARIES :=
 
 LOCAL_STATIC_LIBRARIES += libmtdutils
-LOCAL_STATIC_LIBRARIES += libext4_utils libminadbd libminzip libunz libmincrypt
+LOCAL_STATIC_LIBRARIES += libext4_utils libminadbd libminzip libunz
 LOCAL_STATIC_LIBRARIES += libminuitwrp libpixelflinger_static libpng libjpegtwrp libgui
 LOCAL_SHARED_LIBRARIES += libz libc libstlport libcutils libstdc++
 
diff --git a/common.h b/common.h
index 4122e40..37c0e4c 100644
--- a/common.h
+++ b/common.h
@@ -23,11 +23,12 @@
 extern "C" {
 #endif
 
-#define ui_print(...) fprintf(stdout, __VA_ARGS__)
-#define ui_print_overwrite(...) fprintf(stdout, __VA_ARGS__)
+#define ui_print(...) gui_print(__VA_ARGS__)
+#define ui_print_overwrite(...) gui_print_overwrite(__VA_ARGS__)
 
+#include "gui/gui.h"
 // TODO: restore ui_print for LOGE
-#define LOGE(...) fprintf(stdout, "E:" __VA_ARGS__)
+#define LOGE(...) gui_print("E:" __VA_ARGS__)
 #define LOGW(...) fprintf(stdout, "W:" __VA_ARGS__)
 #define LOGI(...) fprintf(stdout, "I:" __VA_ARGS__)
 
diff --git a/extra-functions.c b/extra-functions.c
index 9157e23..e01ab83 100644
--- a/extra-functions.c
+++ b/extra-functions.c
@@ -222,487 +222,6 @@
 	return (pid == -1 ? -1 : pstat);
 }
 
-char* get_path (char* path) {
-        char *s;
-
-        /* Go to the end of the string.  */
-        s = path + strlen(path) - 1;
-
-        /* Strip off trailing /s (unless it is also the leading /).  */
-        while (path < s && s[0] == '/')
-                s--;
-
-        /* Strip the last component.  */
-        while (path <= s && s[0] != '/')
-                s--;
-
-        while (path < s && s[0] == '/')
-                s--;
-
-        if (s < path)
-                return ".";
-
-        s[1] = '\0';
-	return path;
-}
-
-char* basename(char* name) {
-	const char* base;	
-	for (base = name; *name; name++)
-	{
-		if(*name == '/')
-		{
-			base = name + 1;
-		}		
-	}
-	return (char *) base;
-}
-
-/*
-    Checks md5 for a path
-    Return values:
-        -1 : MD5 does not exist
-        0 : Failed
-        1 : Success
-*/
-int check_md5(char* path) {
-    int o; 
-    char cmd[PATH_MAX + 30];
-    char md5file[PATH_MAX + 40];
-    strcpy(md5file, path);
-    strcat(md5file, ".md5");
-    char dirpath[PATH_MAX];
-    char* file;
-    if (access(md5file, F_OK ) != -1) {
-	strcpy(dirpath, md5file);
-	get_path(dirpath);
-	chdir(dirpath);
-	file = basename(md5file);
-	sprintf(cmd, "/sbin/busybox md5sum -c '%s'", file);
-	FILE * cs = __popen(cmd, "r");
-	char cs_s[PATH_MAX + 50];
-	fgets(cs_s, PATH_MAX + 50, cs);
-	char* OK = strstr(cs_s, "OK");
-	if (OK != NULL) {
-		printf("MD5 is good. returning 1\n");
-		o = 1;
-	}
-	else {
-		printf("MD5 is bad. return -2\n");
-		o = -2;
-	}
-
-	__pclose(cs);
-    } 
-    else {
-	//No md5 file
-	printf("setting o to -1\n");
-	o = -1;
-    }
-
-    return o;
-}
-
-int TWtry_update_binary(const char *path, ZipArchive *zip, int* wipe_cache) {
-	const ZipEntry* binary_entry =
-            mzFindZipEntry(zip, ASSUMED_UPDATE_BINARY_NAME);
-    if (binary_entry == NULL) {
-        mzCloseZipArchive(zip);
-        return INSTALL_CORRUPT;
-    }
-    const char* binary = "/tmp/update_binary";
-    unlink(binary);
-    int fd = creat(binary, 0755);
-    if (fd < 0) {
-        mzCloseZipArchive(zip);
-        LOGE("Can't make %s\n", binary);
-        return INSTALL_ERROR;
-    }
-    bool ok = mzExtractZipEntryToFile(zip, binary_entry, fd);
-    close(fd);
-    mzCloseZipArchive(zip);
-
-    if (!ok) {
-        LOGE("Can't copy %s\n", ASSUMED_UPDATE_BINARY_NAME);
-        return INSTALL_ERROR;
-    }
-
-    int pipefd[2];
-    pipe(pipefd);
-
-    // When executing the update binary contained in the package, the
-    // arguments passed are:
-    //
-    //   - the version number for this interface
-    //
-    //   - an fd to which the program can write in order to update the
-    //     progress bar.  The program can write single-line commands:
-    //
-    //        progress <frac> <secs>
-    //            fill up the next <frac> part of of the progress bar
-    //            over <secs> seconds.  If <secs> is zero, use
-    //            set_progress commands to manually control the
-    //            progress of this segment of the bar
-    //
-    //        set_progress <frac>
-    //            <frac> should be between 0.0 and 1.0; sets the
-    //            progress bar within the segment defined by the most
-    //            recent progress command.
-    //
-    //        firmware <"hboot"|"radio"> <filename>
-    //            arrange to install the contents of <filename> in the
-    //            given partition on reboot.
-    //
-    //            (API v2: <filename> may start with "PACKAGE:" to
-    //            indicate taking a file from the OTA package.)
-    //
-    //            (API v3: this command no longer exists.)
-    //
-    //        ui_print <string>
-    //            display <string> on the screen.
-    //
-    //   - the name of the package zip file.
-    //
-
-    const char** args = (const char**)malloc(sizeof(char*) * 5);
-    args[0] = binary;
-    args[1] = EXPAND(RECOVERY_API_VERSION);   // defined in Android.mk
-    char* temp = (char*)malloc(10);
-    sprintf(temp, "%d", pipefd[1]);
-    args[2] = temp;
-    args[3] = (char*)path;
-    args[4] = NULL;
-
-    pid_t pid = fork();
-    if (pid == 0) {
-        close(pipefd[0]);
-        execv(binary, (char* const*)args);
-        fprintf(stdout, "E:Can't run %s (error)\n", binary);
-        _exit(-1);
-    }
-    close(pipefd[1]);
-    *wipe_cache = 0;
-
-    char buffer[1024];
-    FILE* from_child = fdopen(pipefd[0], "r");
-	LOGI("8\n");
-    while (fgets(buffer, sizeof(buffer), from_child) != NULL) {
-        char* command = strtok(buffer, " \n");
-        if (command == NULL) {
-            continue;
-        } else if (strcmp(command, "progress") == 0) {
-            char* fraction_s = strtok(NULL, " \n");
-            char* seconds_s = strtok(NULL, " \n");
-
-            float fraction = strtof(fraction_s, NULL);
-            int seconds = strtol(seconds_s, NULL, 10);
-
-            //ui->ShowProgress(fraction * (1-VERIFICATION_PROGRESS_FRACTION), seconds);
-        } else if (strcmp(command, "set_progress") == 0) {
-            char* fraction_s = strtok(NULL, " \n");
-            float fraction = strtof(fraction_s, NULL);
-            //ui->SetProgress(fraction);
-        } else if (strcmp(command, "ui_print") == 0) {
-            char* str = strtok(NULL, "\n");
-            if (str) {
-                //ui->Print("%s", str);
-            } else {
-                //ui->Print("\n");
-            }
-        } else if (strcmp(command, "wipe_cache") == 0) {
-            *wipe_cache = 1;
-        } else if (strcmp(command, "clear_display") == 0) {
-            //ui->SetBackground(RecoveryUI::NONE);
-        } else {
-            LOGE("unknown command [%s]\n", command);
-        }
-    }
-    fclose(from_child);
-
-    int status;
-    waitpid(pid, &status, 0);
-    if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
-        LOGE("Error in %s\n(Status %d)\n", path, WEXITSTATUS(status));
-        return INSTALL_ERROR;
-    }
-    return INSTALL_SUCCESS;
-}
-
-// Look for an RSA signature embedded in the .ZIP file comment given
-// the path to the zip.  Verify it matches one of the given public
-// keys.
-//
-// Return VERIFY_SUCCESS, VERIFY_FAILURE (if any error is encountered
-// or no key matches the signature).
-
-int TWverify_file(const char* path, const RSAPublicKey *pKeys, unsigned int numKeys) {
-    //ui->SetProgress(0.0);
-
-    FILE* f = fopen(path, "rb");
-    if (f == NULL) {
-        LOGE("failed to open %s (%s)\n", path, strerror(errno));
-        return VERIFY_FAILURE;
-    }
-
-    // An archive with a whole-file signature will end in six bytes:
-    //
-    //   (2-byte signature start) $ff $ff (2-byte comment size)
-    //
-    // (As far as the ZIP format is concerned, these are part of the
-    // archive comment.)  We start by reading this footer, this tells
-    // us how far back from the end we have to start reading to find
-    // the whole comment.
-
-#define FOOTER_SIZE 6
-
-    if (fseek(f, -FOOTER_SIZE, SEEK_END) != 0) {
-        LOGE("failed to seek in %s (%s)\n", path, strerror(errno));
-        fclose(f);
-        return VERIFY_FAILURE;
-    }
-
-    unsigned char footer[FOOTER_SIZE];
-    if (fread(footer, 1, FOOTER_SIZE, f) != FOOTER_SIZE) {
-        LOGE("failed to read footer from %s (%s)\n", path, strerror(errno));
-        fclose(f);
-        return VERIFY_FAILURE;
-    }
-
-    if (footer[2] != 0xff || footer[3] != 0xff) {
-        fclose(f);
-        return VERIFY_FAILURE;
-    }
-
-    size_t comment_size = footer[4] + (footer[5] << 8);
-    size_t signature_start = footer[0] + (footer[1] << 8);
-    LOGI("comment is %d bytes; signature %d bytes from end\n",
-         comment_size, signature_start);
-
-    if (signature_start - FOOTER_SIZE < RSANUMBYTES) {
-        // "signature" block isn't big enough to contain an RSA block.
-        LOGE("signature is too short\n");
-        fclose(f);
-        return VERIFY_FAILURE;
-    }
-
-#define EOCD_HEADER_SIZE 22
-
-    // The end-of-central-directory record is 22 bytes plus any
-    // comment length.
-    size_t eocd_size = comment_size + EOCD_HEADER_SIZE;
-
-    if (fseek(f, -eocd_size, SEEK_END) != 0) {
-        LOGE("failed to seek in %s (%s)\n", path, strerror(errno));
-        fclose(f);
-        return VERIFY_FAILURE;
-    }
-
-    // Determine how much of the file is covered by the signature.
-    // This is everything except the signature data and length, which
-    // includes all of the EOCD except for the comment length field (2
-    // bytes) and the comment data.
-    size_t signed_len = ftell(f) + EOCD_HEADER_SIZE - 2;
-
-    unsigned char* eocd = (unsigned char*)malloc(eocd_size);
-    if (eocd == NULL) {
-        LOGE("malloc for EOCD record failed\n");
-        fclose(f);
-        return VERIFY_FAILURE;
-    }
-    if (fread(eocd, 1, eocd_size, f) != eocd_size) {
-        LOGE("failed to read eocd from %s (%s)\n", path, strerror(errno));
-        fclose(f);
-        return VERIFY_FAILURE;
-    }
-
-    // If this is really is the EOCD record, it will begin with the
-    // magic number $50 $4b $05 $06.
-    if (eocd[0] != 0x50 || eocd[1] != 0x4b ||
-        eocd[2] != 0x05 || eocd[3] != 0x06) {
-        LOGE("signature length doesn't match EOCD marker\n");
-        fclose(f);
-        return VERIFY_FAILURE;
-    }
-
-    size_t i;
-    for (i = 4; i < eocd_size-3; ++i) {
-        if (eocd[i  ] == 0x50 && eocd[i+1] == 0x4b &&
-            eocd[i+2] == 0x05 && eocd[i+3] == 0x06) {
-            // if the sequence $50 $4b $05 $06 appears anywhere after
-            // the real one, minzip will find the later (wrong) one,
-            // which could be exploitable.  Fail verification if
-            // this sequence occurs anywhere after the real one.
-            LOGE("EOCD marker occurs after start of EOCD\n");
-            fclose(f);
-            return VERIFY_FAILURE;
-        }
-    }
-
-#define BUFFER_SIZE 4096
-
-    SHA_CTX ctx;
-    SHA_init(&ctx);
-    unsigned char* buffer = (unsigned char*)malloc(BUFFER_SIZE);
-    if (buffer == NULL) {
-        LOGE("failed to alloc memory for sha1 buffer\n");
-        fclose(f);
-        return VERIFY_FAILURE;
-    }
-
-    double frac = -1.0;
-    size_t so_far = 0;
-    fseek(f, 0, SEEK_SET);
-    while (so_far < signed_len) {
-        size_t size = BUFFER_SIZE;
-        if (signed_len - so_far < size) size = signed_len - so_far;
-        if (fread(buffer, 1, size, f) != size) {
-            LOGE("failed to read data from %s (%s)\n", path, strerror(errno));
-            fclose(f);
-            return VERIFY_FAILURE;
-        }
-        SHA_update(&ctx, buffer, size);
-        so_far += size;
-        double f = so_far / (double)signed_len;
-        if (f > frac + 0.02 || size == so_far) {
-            //ui->SetProgress(f);
-            frac = f;
-        }
-    }
-    fclose(f);
-    free(buffer);
-
-    const uint8_t* sha1 = SHA_final(&ctx);
-    for (i = 0; i < numKeys; ++i) {
-        // The 6 bytes is the "(signature_start) $ff $ff (comment_size)" that
-        // the signing tool appends after the signature itself.
-        if (RSA_verify(pKeys+i, eocd + eocd_size - 6 - RSANUMBYTES,
-                       RSANUMBYTES, sha1)) {
-            LOGI("whole-file signature verified against key %d\n", i);
-            free(eocd);
-            return VERIFY_SUCCESS;
-        }
-    }
-    free(eocd);
-    LOGE("failed to verify whole-file signature\n");
-    return VERIFY_FAILURE;
-}
-
-// Reads a file containing one or more public keys as produced by
-// DumpPublicKey:  this is an RSAPublicKey struct as it would appear
-// as a C source literal, eg:
-//
-//  "{64,0xc926ad21,{1795090719,...,-695002876},{-857949815,...,1175080310}}"
-//
-// (Note that the braces and commas in this example are actual
-// characters the parser expects to find in the file; the ellipses
-// indicate more numbers omitted from this example.)
-//
-// The file may contain multiple keys in this format, separated by
-// commas.  The last key must not be followed by a comma.
-//
-// Returns NULL if the file failed to parse, or if it contain zero keys.
-static RSAPublicKey*
-TWload_keys(const char* filename, int* numKeys) {
-    RSAPublicKey* out = NULL;
-    *numKeys = 0;
-
-    FILE* f = fopen(filename, "r");
-    if (f == NULL) {
-        LOGE("opening %s: ERROR\n", filename);
-        goto exit;
-    }
-
-    {
-        int i;
-        bool done = false;
-        while (!done) {
-            ++*numKeys;
-            out = (RSAPublicKey*)realloc(out, *numKeys * sizeof(RSAPublicKey));
-            RSAPublicKey* key = out + (*numKeys - 1);
-            if (fscanf(f, " { %i , 0x%x , { %u",
-                       &(key->len), &(key->n0inv), &(key->n[0])) != 3) {
-                goto exit;
-            }
-            if (key->len != RSANUMWORDS) {
-                LOGE("key length (%d) does not match expected size\n", key->len);
-                goto exit;
-            }
-            for (i = 1; i < key->len; ++i) {
-                if (fscanf(f, " , %u", &(key->n[i])) != 1) goto exit;
-            }
-            if (fscanf(f, " } , { %u", &(key->rr[0])) != 1) goto exit;
-            for (i = 1; i < key->len; ++i) {
-                if (fscanf(f, " , %u", &(key->rr[i])) != 1) goto exit;
-            }
-            fscanf(f, " } } ");
-
-            // if the line ends in a comma, this file has more keys.
-            switch (fgetc(f)) {
-            case ',':
-                // more keys to come.
-                break;
-
-            case EOF:
-                done = true;
-                break;
-
-            default:
-                LOGE("unexpected character between keys\n");
-                goto exit;
-            }
-        }
-    }
-
-    fclose(f);
-    return out;
-
-exit:
-    if (f) fclose(f);
-    free(out);
-    *numKeys = 0;
-    return NULL;
-}
-
-int TWinstall_zip(const char* path, int* wipe_cache) {
-	int err;
-
-	if (DataManager_GetIntValue(TW_SIGNED_ZIP_VERIFY_VAR)) {
-		int numKeys;
-		RSAPublicKey* loadedKeys = TWload_keys(PUBLIC_KEYS_FILE, &numKeys);
-		if (loadedKeys == NULL) {
-			LOGE("Failed to load keys\n");
-			return -1;
-		}
-		LOGI("%d key(s) loaded from %s\n", numKeys, PUBLIC_KEYS_FILE);
-
-		// Give verification half the progress bar...
-		//ui->Print("Verifying update package...\n");
-		//ui->SetProgressType(RecoveryUI::DETERMINATE);
-		//ui->ShowProgress(VERIFICATION_PROGRESS_FRACTION, VERIFICATION_PROGRESS_TIME);
-
-		err = TWverify_file(path, loadedKeys, numKeys);
-		free(loadedKeys);
-		LOGI("verify_file returned %d\n", err);
-		if (err != VERIFY_SUCCESS) {
-			LOGE("signature verification failed\n");
-			return -1;
-		}
-	}
-	/* Try to open the package.
-     */
-    ZipArchive zip;
-    err = mzOpenZipArchive(path, &zip);
-    if (err != 0) {
-        LOGE("Can't open %s\n(%s)\n", path, err != -1 ? strerror(err) : "bad");
-        return INSTALL_CORRUPT;
-    }
-
-    /* Verify and install the contents of the package.
-     */
-    //ui->Print("Installing update...\n");
-    return TWtry_update_binary(path, &zip, wipe_cache);
-}
-
 //partial kangbang from system/vold
 #ifndef CUSTOM_LUN_FILE
 #define CUSTOM_LUN_FILE "/sys/devices/platform/usb_mass_storage/lun%d/file"
diff --git a/extra-functions.h b/extra-functions.h
index d3a43cd..6145e77 100644
--- a/extra-functions.h
+++ b/extra-functions.h
@@ -8,12 +8,6 @@
 FILE * __popen(const char *program, const char *type);
 int __pclose(FILE *iop);
 
-// Install Zip functions
-int TWtry_update_binary(const char *path, ZipArchive *zip, int* wipe_cache);
-static RSAPublicKey* TWload_keys(const char* filename, int* numKeys);
-int TWverify_file(const char* path, const RSAPublicKey *pKeys, unsigned int numKeys);
-int TWinstall_zip(const char* path, int* wipe_cache);
-
 void wipe_dalvik_cache();
 void wipe_battery_stats();
 void wipe_rotate_data();
diff --git a/gui/action.cpp b/gui/action.cpp
index 3e19a61..a1f7dd3 100644
--- a/gui/action.cpp
+++ b/gui/action.cpp
@@ -28,7 +28,9 @@
 #include "../recovery_ui.h"
 #include "../extra-functions.h"
 #include "../variables.h"
+#include "../twinstall.h"
 
+int TWinstall_zip(const char* path, int* wipe_cache);
 void fix_perms();
 void wipe_dalvik_cache(void);
 int check_backup_name(int show_error);
@@ -656,6 +658,7 @@
 					ui_print("TWRP injection complete.\n");
 				}
 			}
+			PartitionManager.Update_System_Details();
 			operation_end(ret_val, simulate);
             return 0;
         }
diff --git a/gui/console.cpp b/gui/console.cpp
index 6d53ed1..b7713c7 100644
--- a/gui/console.cpp
+++ b/gui/console.cpp
@@ -38,6 +38,8 @@
     vsnprintf(buf, 512, fmt, ap);
     va_end(ap);
 
+	fputs(buf, stdout);
+
     char *start, *next;
 
 	if (buf[0] == '\n' && strlen(buf) < 2) {
@@ -75,6 +77,8 @@
     vsnprintf(buf, 512, fmt, ap);
     va_end(ap);
 
+	fputs(buf, stdout);
+
     // Pop the last line, and we can continue
     if (!gConsole.empty())   gConsole.pop_back();
 
diff --git a/gui/gui.h b/gui/gui.h
index f6745d7..948e11b 100644
--- a/gui/gui.h
+++ b/gui/gui.h
@@ -5,6 +5,8 @@
 int gui_init();
 int gui_loadResources();
 int gui_start();
+void gui_print(const char *fmt, ...);
+void gui_print_overwrite(const char *fmt, ...);
 
 #endif  // _GUI_HEADER
 
diff --git a/install.cpp b/install.cpp
index 8d36cb5..4d73aa9 100644
--- a/install.cpp
+++ b/install.cpp
@@ -46,7 +46,7 @@
 static const float DEFAULT_IMAGE_PROGRESS_FRACTION = 0.1;
 
 // If the package contains an update binary, extract it and run it.
-extern "C" int
+static int
 try_update_binary(const char *path, ZipArchive *zip, int* wipe_cache) {
     const ZipEntry* binary_entry =
             mzFindZipEntry(zip, ASSUMED_UPDATE_BINARY_NAME);
diff --git a/partitionmanager.cpp b/partitionmanager.cpp
index 47cc847..21752a0 100644
--- a/partitionmanager.cpp
+++ b/partitionmanager.cpp
@@ -629,7 +629,7 @@
 	std::vector<TWPartition*>::iterator iter;
 	int data_size = 0;
 
-	LOGI("Updating system details...\n");
+	ui_print("Updating partition details...\n");
 	for (iter = Partitions.begin(); iter != Partitions.end(); iter++) {
 		if ((*iter)->Can_Be_Mounted) {
 			(*iter)->Update_Size(true);
@@ -696,7 +696,7 @@
 			DataManager::SetValue(TW_IS_DECRYPTED, 1);
 			dat->Is_Decrypted = true;
 			dat->Decrypted_Block_Device = crypto_blkdev;
-			LOGI("Data successfully decrypted, new block device: '%s'\n", crypto_blkdev);
+			ui_print("Data successfully decrypted, new block device: '%s'\n", crypto_blkdev);
 			// Sleep for a bit so that the device will be ready
 			sleep(1);
 			Update_System_Details();
diff --git a/prebuilt/bbinstall.sh b/prebuilt/bbinstall.sh
index c59fec2..2aab969 100755
--- a/prebuilt/bbinstall.sh
+++ b/prebuilt/bbinstall.sh
@@ -1,5 +1,10 @@
 #!/sbin/sh
 
+if [ -f "/sbin/[" ];
+then
+exit
+fi
+
 for cmd in $(/sbin/busybox --list); do
 	/sbin/busybox ln -s /sbin/busybox /sbin/$cmd
 done
diff --git a/recovery.cpp b/recovery.cpp
index 450f363..567a42e 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -54,7 +54,6 @@
 #include "variables.h"
 
 TWPartitionManager PartitionManager;
-char device_id[64];
 
 struct selabel_handle *sehandle;
 
@@ -793,8 +792,8 @@
     // set by init
     umask(0);
 
-    //Device* device = make_device();
-    //ui = device->GetUI();
+    Device* device = make_device();
+    ui = device->GetUI();
 
 	//ui->Init();
     //ui->SetBackground(RecoveryUI::NONE);
diff --git a/screen_ui.cpp b/screen_ui.cpp
index 60a0ad4..4441f7a 100644
--- a/screen_ui.cpp
+++ b/screen_ui.cpp
@@ -36,7 +36,9 @@
 extern "C" {
 #include "minuitwrp/minui.h"
 int twgr_text(int x, int y, const char *s);
+#include "gui/gui.h"
 }
+#include "data.hpp"
 
 #define CHAR_WIDTH 10
 #define CHAR_HEIGHT 18
@@ -220,7 +222,7 @@
 // Updates only the progress bar, if possible, otherwise redraws the screen.
 // Should only be called with updateMutex locked.
 void ScreenRecoveryUI::update_progress_locked()
-{
+{return;
     if (show_text || !pagesIdentical) {
         draw_screen_locked();    // Must redraw the whole screen
         pagesIdentical = true;
@@ -364,6 +366,9 @@
 
 void ScreenRecoveryUI::ShowProgress(float portion, float seconds)
 {
+	DataManager::SetValue("ui_progress_portion", (float)(portion * 100.0));
+    DataManager::SetValue("ui_progress_frames", seconds * 30);
+
     pthread_mutex_lock(&updateMutex);
     progressBarType = DETERMINATE;
     progressScopeStart += progressScopeSize;
@@ -377,6 +382,8 @@
 
 void ScreenRecoveryUI::SetProgress(float fraction)
 {
+	DataManager::SetValue("ui_progress", (float) (fraction * 100.0)); return;
+
     pthread_mutex_lock(&updateMutex);
     if (fraction < 0.0) fraction = 0.0;
     if (fraction > 1.0) fraction = 1.0;
@@ -400,6 +407,9 @@
     vsnprintf(buf, 256, fmt, ap);
     va_end(ap);
 
+	gui_print("%s", buf);
+	return;
+
     fputs(buf, stdout);
 
     // This can get called before ui_init(), so be careful.
diff --git a/twinstall.cpp b/twinstall.cpp
new file mode 100644
index 0000000..0c3d837
--- /dev/null
+++ b/twinstall.cpp
@@ -0,0 +1,580 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include <string.h>
+#include <stdio.h>
+
+#include "common.h"
+#include "twmincrypt/twrsa.h"
+#include "twmincrypt/twsha.h"
+#include "minui/minui.h"
+#include "minzip/SysUtil.h"
+#include "minzip/Zip.h"
+#include "mtdutils/mounts.h"
+#include "mtdutils/mtdutils.h"
+#include "roots.h"
+#include "verifier.h"
+#include "ui.h"
+#include "variables.h"
+#include "data.hpp"
+#include "partitions.hpp"
+
+extern "C" {
+#include "extra-functions.h"
+int __system(const char *command);
+};
+
+extern RecoveryUI* ui;
+
+#define ASSUMED_UPDATE_BINARY_NAME  "META-INF/com/google/android/update-binary"
+#define PUBLIC_KEYS_FILE "/res/keys"
+
+// Default allocation of progress bar segments to operations
+static const int VERIFICATION_PROGRESS_TIME = 60;
+static const float VERIFICATION_PROGRESS_FRACTION = 0.25;
+static const float DEFAULT_FILES_PROGRESS_FRACTION = 0.4;
+static const float DEFAULT_IMAGE_PROGRESS_FRACTION = 0.1;
+
+enum { INSTALL_SUCCESS, INSTALL_ERROR, INSTALL_CORRUPT };
+
+// Look for an RSA signature embedded in the .ZIP file comment given
+// the path to the zip.  Verify it matches one of the given public
+// keys.
+//
+// Return VERIFY_SUCCESS, VERIFY_FAILURE (if any error is encountered
+// or no key matches the signature).
+
+int TWverify_file(const char* path, const RSAPublicKey *pKeys, unsigned int numKeys) {
+    ui->SetProgress(0.0);
+
+    FILE* f = fopen(path, "rb");
+    if (f == NULL) {
+        LOGE("failed to open %s (%s)\n", path, strerror(errno));
+        return VERIFY_FAILURE;
+    }
+
+    // An archive with a whole-file signature will end in six bytes:
+    //
+    //   (2-byte signature start) $ff $ff (2-byte comment size)
+    //
+    // (As far as the ZIP format is concerned, these are part of the
+    // archive comment.)  We start by reading this footer, this tells
+    // us how far back from the end we have to start reading to find
+    // the whole comment.
+
+#define FOOTER_SIZE 6
+
+    if (fseek(f, -FOOTER_SIZE, SEEK_END) != 0) {
+        LOGE("failed to seek in %s (%s)\n", path, strerror(errno));
+        fclose(f);
+        return VERIFY_FAILURE;
+    }
+
+    unsigned char footer[FOOTER_SIZE];
+    if (fread(footer, 1, FOOTER_SIZE, f) != FOOTER_SIZE) {
+        LOGE("failed to read footer from %s (%s)\n", path, strerror(errno));
+        fclose(f);
+        return VERIFY_FAILURE;
+    }
+
+    if (footer[2] != 0xff || footer[3] != 0xff) {
+        fclose(f);
+        return VERIFY_FAILURE;
+    }
+
+    size_t comment_size = footer[4] + (footer[5] << 8);
+    size_t signature_start = footer[0] + (footer[1] << 8);
+    LOGI("comment is %d bytes; signature %d bytes from end\n",
+         comment_size, signature_start);
+
+    if (signature_start - FOOTER_SIZE < RSANUMBYTES) {
+        // "signature" block isn't big enough to contain an RSA block.
+        LOGE("signature is too short\n");
+        fclose(f);
+        return VERIFY_FAILURE;
+    }
+
+#define EOCD_HEADER_SIZE 22
+
+    // The end-of-central-directory record is 22 bytes plus any
+    // comment length.
+    size_t eocd_size = comment_size + EOCD_HEADER_SIZE;
+
+    if (fseek(f, -eocd_size, SEEK_END) != 0) {
+        LOGE("failed to seek in %s (%s)\n", path, strerror(errno));
+        fclose(f);
+        return VERIFY_FAILURE;
+    }
+
+    // Determine how much of the file is covered by the signature.
+    // This is everything except the signature data and length, which
+    // includes all of the EOCD except for the comment length field (2
+    // bytes) and the comment data.
+    size_t signed_len = ftell(f) + EOCD_HEADER_SIZE - 2;
+
+    unsigned char* eocd = (unsigned char*)malloc(eocd_size);
+    if (eocd == NULL) {
+        LOGE("malloc for EOCD record failed\n");
+        fclose(f);
+        return VERIFY_FAILURE;
+    }
+    if (fread(eocd, 1, eocd_size, f) != eocd_size) {
+        LOGE("failed to read eocd from %s (%s)\n", path, strerror(errno));
+        fclose(f);
+        return VERIFY_FAILURE;
+    }
+
+    // If this is really is the EOCD record, it will begin with the
+    // magic number $50 $4b $05 $06.
+    if (eocd[0] != 0x50 || eocd[1] != 0x4b ||
+        eocd[2] != 0x05 || eocd[3] != 0x06) {
+        LOGE("signature length doesn't match EOCD marker\n");
+        fclose(f);
+        return VERIFY_FAILURE;
+    }
+
+    size_t i;
+    for (i = 4; i < eocd_size-3; ++i) {
+        if (eocd[i  ] == 0x50 && eocd[i+1] == 0x4b &&
+            eocd[i+2] == 0x05 && eocd[i+3] == 0x06) {
+            // if the sequence $50 $4b $05 $06 appears anywhere after
+            // the real one, minzip will find the later (wrong) one,
+            // which could be exploitable.  Fail verification if
+            // this sequence occurs anywhere after the real one.
+            LOGE("EOCD marker occurs after start of EOCD\n");
+            fclose(f);
+            return VERIFY_FAILURE;
+        }
+    }
+
+#define BUFFER_SIZE 4096
+
+    SHA_CTX ctx;
+    SHA_init(&ctx);
+    unsigned char* buffer = (unsigned char*)malloc(BUFFER_SIZE);
+    if (buffer == NULL) {
+        LOGE("failed to alloc memory for sha1 buffer\n");
+        fclose(f);
+        return VERIFY_FAILURE;
+    }
+
+    double frac = -1.0;
+    size_t so_far = 0;
+    fseek(f, 0, SEEK_SET);
+    while (so_far < signed_len) {
+        size_t size = BUFFER_SIZE;
+        if (signed_len - so_far < size) size = signed_len - so_far;
+        if (fread(buffer, 1, size, f) != size) {
+            LOGE("failed to read data from %s (%s)\n", path, strerror(errno));
+            fclose(f);
+            return VERIFY_FAILURE;
+        }
+        SHA_update(&ctx, buffer, size);
+        so_far += size;
+        double f = so_far / (double)signed_len;
+        if (f > frac + 0.02 || size == so_far) {
+            ui->SetProgress(f);
+            frac = f;
+        }
+    }
+    fclose(f);
+    free(buffer);
+
+    const uint8_t* sha1 = SHA_final(&ctx);
+    for (i = 0; i < numKeys; ++i) {
+        // The 6 bytes is the "(signature_start) $ff $ff (comment_size)" that
+        // the signing tool appends after the signature itself.
+        if (RSA_verify(pKeys+i, eocd + eocd_size - 6 - RSANUMBYTES,
+                       RSANUMBYTES, sha1)) {
+            LOGI("whole-file signature verified against key %d\n", i);
+            free(eocd);
+            return VERIFY_SUCCESS;
+        }
+    }
+    free(eocd);
+    LOGE("failed to verify whole-file signature\n");
+    return VERIFY_FAILURE;
+}
+
+// If the package contains an update binary, extract it and run it.
+static int
+try_update_binary(const char *path, ZipArchive *zip, int* wipe_cache) {
+    const ZipEntry* binary_entry =
+            mzFindZipEntry(zip, ASSUMED_UPDATE_BINARY_NAME);
+    if (binary_entry == NULL) {
+        mzCloseZipArchive(zip);
+        return INSTALL_CORRUPT;
+    }
+
+    const char* binary = "/tmp/update_binary";
+    unlink(binary);
+    int fd = creat(binary, 0755);
+    if (fd < 0) {
+        mzCloseZipArchive(zip);
+        LOGE("Can't make %s\n", binary);
+        return INSTALL_ERROR;
+    }
+    bool ok = mzExtractZipEntryToFile(zip, binary_entry, fd);
+    close(fd);
+    mzCloseZipArchive(zip);
+
+    if (!ok) {
+        LOGE("Can't copy %s\n", ASSUMED_UPDATE_BINARY_NAME);
+        return INSTALL_ERROR;
+    }
+
+    int pipefd[2];
+    pipe(pipefd);
+
+    // When executing the update binary contained in the package, the
+    // arguments passed are:
+    //
+    //   - the version number for this interface
+    //
+    //   - an fd to which the program can write in order to update the
+    //     progress bar.  The program can write single-line commands:
+    //
+    //        progress <frac> <secs>
+    //            fill up the next <frac> part of of the progress bar
+    //            over <secs> seconds.  If <secs> is zero, use
+    //            set_progress commands to manually control the
+    //            progress of this segment of the bar
+    //
+    //        set_progress <frac>
+    //            <frac> should be between 0.0 and 1.0; sets the
+    //            progress bar within the segment defined by the most
+    //            recent progress command.
+    //
+    //        firmware <"hboot"|"radio"> <filename>
+    //            arrange to install the contents of <filename> in the
+    //            given partition on reboot.
+    //
+    //            (API v2: <filename> may start with "PACKAGE:" to
+    //            indicate taking a file from the OTA package.)
+    //
+    //            (API v3: this command no longer exists.)
+    //
+    //        ui_print <string>
+    //            display <string> on the screen.
+    //
+    //   - the name of the package zip file.
+    //
+
+    const char** args = (const char**)malloc(sizeof(char*) * 5);
+    args[0] = binary;
+    args[1] = EXPAND(RECOVERY_API_VERSION);   // defined in Android.mk
+    char* temp = (char*)malloc(10);
+    sprintf(temp, "%d", pipefd[1]);
+    args[2] = temp;
+    args[3] = (char*)path;
+    args[4] = NULL;
+
+    pid_t pid = fork();
+    if (pid == 0) {
+        close(pipefd[0]);
+        execv(binary, (char* const*)args);
+        fprintf(stdout, "E:Can't run %s (%s)\n", binary, strerror(errno));
+        _exit(-1);
+    }
+    close(pipefd[1]);
+
+    *wipe_cache = 0;
+
+    char buffer[1024];
+    FILE* from_child = fdopen(pipefd[0], "r");
+    while (fgets(buffer, sizeof(buffer), from_child) != NULL) {
+        char* command = strtok(buffer, " \n");
+        if (command == NULL) {
+            continue;
+        } else if (strcmp(command, "progress") == 0) {
+            char* fraction_s = strtok(NULL, " \n");
+            char* seconds_s = strtok(NULL, " \n");
+
+            float fraction = strtof(fraction_s, NULL);
+            int seconds = strtol(seconds_s, NULL, 10);
+
+            ui->ShowProgress(fraction * (1-VERIFICATION_PROGRESS_FRACTION), seconds);
+        } else if (strcmp(command, "set_progress") == 0) {
+            char* fraction_s = strtok(NULL, " \n");
+            float fraction = strtof(fraction_s, NULL);
+            ui->SetProgress(fraction);
+        } else if (strcmp(command, "ui_print") == 0) {
+            char* str = strtok(NULL, "\n");
+            if (str) {
+                ui->Print("%s", str);
+            } else {
+                ui->Print("\n");
+            }
+        } else if (strcmp(command, "wipe_cache") == 0) {
+            *wipe_cache = 1;
+        } else if (strcmp(command, "clear_display") == 0) {
+            //ui->SetBackground(RecoveryUI::NONE);
+        } else {
+            LOGE("unknown command [%s]\n", command);
+        }
+    }
+    fclose(from_child);
+
+    int status;
+    waitpid(pid, &status, 0);
+    if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+        LOGE("Error in %s\n(Status %d)\n", path, WEXITSTATUS(status));
+        return INSTALL_ERROR;
+    }
+
+    return INSTALL_SUCCESS;
+}
+
+// Reads a file containing one or more public keys as produced by
+// DumpPublicKey:  this is an RSAPublicKey struct as it would appear
+// as a C source literal, eg:
+//
+//  "{64,0xc926ad21,{1795090719,...,-695002876},{-857949815,...,1175080310}}"
+//
+// (Note that the braces and commas in this example are actual
+// characters the parser expects to find in the file; the ellipses
+// indicate more numbers omitted from this example.)
+//
+// The file may contain multiple keys in this format, separated by
+// commas.  The last key must not be followed by a comma.
+//
+// Returns NULL if the file failed to parse, or if it contain zero keys.
+static RSAPublicKey*
+load_keys(const char* filename, int* numKeys) {
+    RSAPublicKey* out = NULL;
+    *numKeys = 0;
+
+    FILE* f = fopen(filename, "r");
+    if (f == NULL) {
+        LOGE("opening %s: %s\n", filename, strerror(errno));
+        goto exit;
+    }
+
+    {
+        int i;
+        bool done = false;
+        while (!done) {
+            ++*numKeys;
+            out = (RSAPublicKey*)realloc(out, *numKeys * sizeof(RSAPublicKey));
+            RSAPublicKey* key = out + (*numKeys - 1);
+            if (fscanf(f, " { %i , 0x%x , { %u",
+                       &(key->len), &(key->n0inv), &(key->n[0])) != 3) {
+                goto exit;
+            }
+            if (key->len != RSANUMWORDS) {
+                LOGE("key length (%d) does not match expected size\n", key->len);
+                goto exit;
+            }
+            for (i = 1; i < key->len; ++i) {
+                if (fscanf(f, " , %u", &(key->n[i])) != 1) goto exit;
+            }
+            if (fscanf(f, " } , { %u", &(key->rr[0])) != 1) goto exit;
+            for (i = 1; i < key->len; ++i) {
+                if (fscanf(f, " , %u", &(key->rr[i])) != 1) goto exit;
+            }
+            fscanf(f, " } } ");
+
+            // if the line ends in a comma, this file has more keys.
+            switch (fgetc(f)) {
+            case ',':
+                // more keys to come.
+                break;
+
+            case EOF:
+                done = true;
+                break;
+
+            default:
+                LOGE("unexpected character between keys\n");
+                goto exit;
+            }
+        }
+    }
+
+    fclose(f);
+    return out;
+
+exit:
+    if (f) fclose(f);
+    free(out);
+    *numKeys = 0;
+    return NULL;
+}
+
+char* get_path (char* path) {
+        char *s;
+
+        /* Go to the end of the string.  */
+        s = path + strlen(path) - 1;
+
+        /* Strip off trailing /s (unless it is also the leading /).  */
+        while (path < s && s[0] == '/')
+                s--;
+
+        /* Strip the last component.  */
+        while (path <= s && s[0] != '/')
+                s--;
+
+        while (path < s && s[0] == '/')
+                s--;
+
+        if (s < path)
+                return (char*)(".");
+
+        s[1] = '\0';
+	return path;
+}
+
+/*
+    Checks md5 for a path
+    Return values:
+        -1 : MD5 does not exist
+        0 : Failed
+        1 : Success
+*/
+int check_md5(const char* path) {
+	FILE* fp;
+	char command[255], line[512], actual_md5[512], md5[512];
+	char md5file[PATH_MAX + 40];
+	char *ptr;
+	unsigned int line_len, index = 0;
+	struct stat st;
+
+	// Check to see if the filename.zip.md5 file exists
+	strcpy(md5file, path);
+    strcat(md5file, ".md5");
+	if (stat(md5file, &st) != 0)
+		return -1; // no MD5 file found
+
+	// Dump the md5 of the zip to a text file for reading
+	sprintf(command, "md5sum '%s' > /tmp/md5output.txt", path);
+	__system(command);
+	fp = fopen("/tmp/md5output.txt", "rt");
+	if (fp == NULL) {
+		LOGI("Unable to open /tmp/md5output.txt.\n");
+		return false;
+	}
+
+	while (fgets(line, sizeof(line), fp) != NULL)
+	{
+		line_len = strlen(line);
+		for (index = 0; index < line_len; index++) {
+			if (line[index] <= 32)
+				line[index] = '\0';
+		}
+		strcpy(actual_md5, line);
+		break;
+	}
+	fclose(fp);
+
+	// Read the filename.zip.md5 file
+	fp = fopen(md5file, "rt");
+	if (fp == NULL) {
+		LOGI("Unable to open '%s'.\n", md5file);
+		return false;
+	}
+
+	while (fgets(line, sizeof(line), fp) != NULL)
+	{
+		line_len = strlen(line);
+		for (index = 0; index < line_len; index++) {
+			if (line[index] <= 32)
+				line[index] = '\0';
+		}
+		strcpy(md5, line);
+		break;
+	}
+	fclose(fp);
+
+	// Comare the 2 MD5 values
+	if (strcmp(actual_md5, md5) == 0)
+		return 1;
+	LOGI("MD5 did not match: '%s' != '%s'\n", actual_md5, md5);
+	return 0;
+}
+
+extern "C" int TWinstall_zip(const char* path, int* wipe_cache) {
+	int err, zip_verify, md5_return, md5_verify;
+
+	ui_print("Installing '%s'...\n", path);
+
+	if (!PartitionManager.Mount_By_Path(path, 0)) {
+		LOGE("Failed to mount '%s'\n", path);
+		return -1;
+	}
+
+	ui_print("Checking for MD5 file...\n");
+	md5_return = check_md5(path);
+	if (md5_return == 0) {
+		// MD5 did not match.
+		LOGE("Zip MD5 does not match.\nUnable to install zip.\n");
+		return INSTALL_CORRUPT;
+	} else if (md5_return == -1) {
+		DataManager::GetValue(TW_FORCE_MD5_CHECK_VAR, md5_verify);
+		if (md5_verify == 1) {
+			// Forced MD5 checking is on and no MD5 file found.
+			LOGE("No MD5 file found for '%s'.\nDisable force MD5 check to avoid this error.\n", path);
+			return INSTALL_CORRUPT;
+		} else
+			ui_print("No MD5 file found, this is not an error.\n");
+	} else if (md5_return == 1)
+		ui_print("Zip MD5 matched.\n"); // MD5 found and matched.
+
+	DataManager::GetValue(TW_SIGNED_ZIP_VERIFY_VAR, zip_verify);
+	if (zip_verify) {
+		ui_print("Verifying zip signature...\n");
+		int numKeys;
+		RSAPublicKey* loadedKeys = load_keys(PUBLIC_KEYS_FILE, &numKeys);
+		if (loadedKeys == NULL) {
+			LOGE("Failed to load keys\n");
+			return -1;
+		}
+		LOGI("%d key(s) loaded from %s\n", numKeys, PUBLIC_KEYS_FILE);
+
+		// Give verification half the progress bar...
+		ui->Print("Verifying update package...\n");
+		ui->SetProgressType(RecoveryUI::DETERMINATE);
+		ui->ShowProgress(VERIFICATION_PROGRESS_FRACTION, VERIFICATION_PROGRESS_TIME);
+
+		err = TWverify_file(path, loadedKeys, numKeys);
+		free(loadedKeys);
+		LOGI("verify_file returned %d\n", err);
+		if (err != VERIFY_SUCCESS) {
+			LOGE("signature verification failed\n");
+			return -1;
+		}
+	}
+	/* Try to open the package.
+     */
+    ZipArchive zip;
+    err = mzOpenZipArchive(path, &zip);
+    if (err != 0) {
+        LOGE("Can't open %s\n(%s)\n", path, err != -1 ? strerror(err) : "bad");
+        return INSTALL_CORRUPT;
+    }
+
+    /* Verify and install the contents of the package.
+     */
+    return try_update_binary(path, &zip, wipe_cache);
+}
diff --git a/twinstall.h b/twinstall.h
new file mode 100644
index 0000000..8fd940e
--- /dev/null
+++ b/twinstall.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef RECOVERY_INSTALL_H_
+#define RECOVERY_INSTALL_H_
+
+#include "common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int TWinstall_zip(const char* path, int* wipe_cache);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // RECOVERY_INSTALL_H_
diff --git a/twmincrypt/twrsa.c b/twmincrypt/twrsa.c
new file mode 100644
index 0000000..52d6bfb
--- /dev/null
+++ b/twmincrypt/twrsa.c
@@ -0,0 +1,199 @@
+/* rsa.c
+**
+** Copyright 2008, The Android Open Source Project
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of Google Inc. nor the names of its contributors may
+**       be used to endorse or promote products derived from this software
+**       without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR 
+** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 
+** EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
+** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
+** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
+** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include "twrsa.h"
+#include "twsha.h"
+#include "common.h"
+
+/* a[] -= mod */
+static void subM(const RSAPublicKey *key, uint32_t *a) {
+    int64_t A = 0;
+    int i;
+    for (i = 0; i < key->len; ++i) {
+        A += (uint64_t)a[i] - key->n[i];
+        a[i] = (uint32_t)A;
+        A >>= 32;
+    }
+}
+
+/* return a[] >= mod */
+static int geM(const RSAPublicKey *key, const uint32_t *a) {
+    int i;
+    for (i = key->len; i;) {
+        --i;
+        if (a[i] < key->n[i]) return 0;
+        if (a[i] > key->n[i]) return 1;
+    }
+    return 1;  /* equal */
+}
+
+/* montgomery c[] += a * b[] / R % mod */
+static void montMulAdd(const RSAPublicKey *key,
+                       uint32_t* c,
+                       const uint32_t a,
+                       const uint32_t* b) {
+    uint64_t A = (uint64_t)a * b[0] + c[0];
+    uint32_t d0 = (uint32_t)A * key->n0inv;
+    uint64_t B = (uint64_t)d0 * key->n[0] + (uint32_t)A;
+    int i;
+
+    for (i = 1; i < key->len; ++i) {
+        A = (A >> 32) + (uint64_t)a * b[i] + c[i];
+        B = (B >> 32) + (uint64_t)d0 * key->n[i] + (uint32_t)A;
+        c[i - 1] = (uint32_t)B;
+    }
+
+    A = (A >> 32) + (B >> 32);
+
+    c[i - 1] = (uint32_t)A;
+
+    if (A >> 32) {
+        subM(key, c);
+    }
+}
+
+/* montgomery c[] = a[] * b[] / R % mod */
+static void montMul(const RSAPublicKey *key,
+                    uint32_t* c,
+                    const uint32_t* a,
+                    const uint32_t* b) {
+    int i;
+    for (i = 0; i < key->len; ++i) {
+        c[i] = 0;
+    }
+    for (i = 0; i < key->len; ++i) {
+        montMulAdd(key, c, a[i], b);
+    }
+}
+
+/* In-place public exponentiation.
+** Input and output big-endian byte array in inout.
+*/
+static void modpow3(const RSAPublicKey *key,
+                    uint8_t* inout) {
+    uint32_t a[RSANUMWORDS];
+    uint32_t aR[RSANUMWORDS];
+    uint32_t aaR[RSANUMWORDS];
+    uint32_t *aaa = aR;  /* Re-use location. */
+    int i;
+
+    /* Convert from big endian byte array to little endian word array. */
+    for (i = 0; i < key->len; ++i) {
+        uint32_t tmp =
+            (inout[((key->len - 1 - i) * 4) + 0] << 24) |
+            (inout[((key->len - 1 - i) * 4) + 1] << 16) |
+            (inout[((key->len - 1 - i) * 4) + 2] << 8) |
+            (inout[((key->len - 1 - i) * 4) + 3] << 0);
+        a[i] = tmp;
+    }
+
+    montMul(key, aR, a, key->rr);  /* aR = a * RR / R mod M   */
+    montMul(key, aaR, aR, aR);     /* aaR = aR * aR / R mod M */
+    montMul(key, aaa, aaR, a);     /* aaa = aaR * a / R mod M */
+
+    /* Make sure aaa < mod; aaa is at most 1x mod too large. */
+    if (geM(key, aaa)) {
+        subM(key, aaa);
+    }
+
+    /* Convert to bigendian byte array */
+    for (i = key->len - 1; i >= 0; --i) {
+        uint32_t tmp = aaa[i];
+        *inout++ = tmp >> 24;
+        *inout++ = tmp >> 16;
+        *inout++ = tmp >> 8;
+        *inout++ = tmp >> 0;
+    }
+}
+
+/* Expected PKCS1.5 signature padding bytes, for a keytool RSA signature.
+** Has the 0-length optional parameter encoded in the ASN1 (as opposed to the
+** other flavor which omits the optional parameter entirely). This code does not
+** accept signatures without the optional parameter.
+*/
+static const uint8_t padding[RSANUMBYTES - SHA_DIGEST_SIZE] = {
+    0x00,0x01,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+    0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00,
+    0x30,0x21,0x30,0x09,0x06,0x05,0x2b,0x0e,0x03,0x02,0x1a,0x05,0x00,
+    0x04,0x14
+};
+
+/* Verify a 2048 bit RSA PKCS1.5 signature against an expected SHA-1 hash.
+** Returns 0 on failure, 1 on success.
+*/
+int RSA_verify(const RSAPublicKey *key,
+               const uint8_t *signature,
+               const int len,
+               const uint8_t *sha) {
+    uint8_t buf[RSANUMBYTES];
+    int i;
+
+    if (key->len != RSANUMWORDS) {
+        return 0;  /* Wrong key passed in. */
+    }
+
+    if (len != sizeof(buf)) {
+        return 0;  /* Wrong input length. */
+    }
+
+    for (i = 0; i < len; ++i) {
+        buf[i] = signature[i];
+    }
+
+    modpow3(key, buf);
+
+    /* Check pkcs1.5 padding bytes. */
+    for (i = 0; i < (int) sizeof(padding); ++i) {
+        if (buf[i] != padding[i]) {
+            return 0;
+        }
+    }
+
+    /* Check sha digest matches. */
+    for (; i < len; ++i) {
+        if (buf[i] != *sha++) {
+            return 0;
+        }
+    }
+
+    return 1;
+}
diff --git a/twmincrypt/twrsa.h b/twmincrypt/twrsa.h
new file mode 100644
index 0000000..7d7d571
--- /dev/null
+++ b/twmincrypt/twrsa.h
@@ -0,0 +1,56 @@
+/* rsa.h
+**
+** Copyright 2008, The Android Open Source Project
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of Google Inc. nor the names of its contributors may
+**       be used to endorse or promote products derived from this software
+**       without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR 
+** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 
+** EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
+** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
+** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
+** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef _EMBEDDED_RSA_H_
+#define _EMBEDDED_RSA_H_
+
+#include <inttypes.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RSANUMBYTES 256           /* 2048 bit key length */
+#define RSANUMWORDS (RSANUMBYTES / sizeof(uint32_t))
+
+typedef struct RSAPublicKey {
+    int len;                  /* Length of n[] in number of uint32_t */
+    uint32_t n0inv;           /* -1 / n[0] mod 2^32 */
+    uint32_t n[RSANUMWORDS];  /* modulus as little endian array */
+    uint32_t rr[RSANUMWORDS]; /* R^2 as little endian array */
+} RSAPublicKey;
+
+int RSA_verify(const RSAPublicKey *key,
+               const uint8_t* signature,
+               const int len,
+               const uint8_t* sha);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/twmincrypt/twsha.c b/twmincrypt/twsha.c
new file mode 100644
index 0000000..ac712c2
--- /dev/null
+++ b/twmincrypt/twsha.c
@@ -0,0 +1,307 @@
+/* sha.c
+**
+** Copyright 2008, The Android Open Source Project
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of Google Inc. nor the names of its contributors may
+**       be used to endorse or promote products derived from this software
+**       without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR
+** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+** EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include "twsha.h"
+
+// Some machines lack byteswap.h and endian.h.  These have to use the
+// slower code, even if they're little-endian.
+
+#if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)
+
+#include <byteswap.h>
+#include <memory.h>
+
+// This version is about 28% faster than the generic version below,
+// but assumes little-endianness.
+
+static inline uint32_t ror27(uint32_t val) {
+    return (val >> 27) | (val << 5);
+}
+static inline uint32_t ror2(uint32_t val) {
+    return (val >> 2) | (val << 30);
+}
+static inline uint32_t ror31(uint32_t val) {
+    return (val >> 31) | (val << 1);
+}
+
+static void SHA1_Transform(SHA_CTX* ctx) {
+    uint32_t W[80];
+    register uint32_t A, B, C, D, E;
+    int t;
+
+    A = ctx->state[0];
+    B = ctx->state[1];
+    C = ctx->state[2];
+    D = ctx->state[3];
+    E = ctx->state[4];
+
+#define SHA_F1(A,B,C,D,E,t)                     \
+    E += ror27(A) +                             \
+        (W[t] = bswap_32(ctx->buf.w[t])) +      \
+        (D^(B&(C^D))) + 0x5A827999;             \
+    B = ror2(B);
+
+    for (t = 0; t < 15; t += 5) {
+        SHA_F1(A,B,C,D,E,t + 0);
+        SHA_F1(E,A,B,C,D,t + 1);
+        SHA_F1(D,E,A,B,C,t + 2);
+        SHA_F1(C,D,E,A,B,t + 3);
+        SHA_F1(B,C,D,E,A,t + 4);
+    }
+    SHA_F1(A,B,C,D,E,t + 0);  // 16th one, t == 15
+
+#undef SHA_F1
+
+#define SHA_F1(A,B,C,D,E,t)                                     \
+    E += ror27(A) +                                             \
+        (W[t] = ror31(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16])) +   \
+        (D^(B&(C^D))) + 0x5A827999;                             \
+    B = ror2(B);
+
+    SHA_F1(E,A,B,C,D,t + 1);
+    SHA_F1(D,E,A,B,C,t + 2);
+    SHA_F1(C,D,E,A,B,t + 3);
+    SHA_F1(B,C,D,E,A,t + 4);
+
+#undef SHA_F1
+
+#define SHA_F2(A,B,C,D,E,t)                                     \
+    E += ror27(A) +                                             \
+        (W[t] = ror31(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16])) +   \
+        (B^C^D) + 0x6ED9EBA1;                                   \
+    B = ror2(B);
+
+    for (t = 20; t < 40; t += 5) {
+        SHA_F2(A,B,C,D,E,t + 0);
+        SHA_F2(E,A,B,C,D,t + 1);
+        SHA_F2(D,E,A,B,C,t + 2);
+        SHA_F2(C,D,E,A,B,t + 3);
+        SHA_F2(B,C,D,E,A,t + 4);
+    }
+
+#undef SHA_F2
+
+#define SHA_F3(A,B,C,D,E,t)                                     \
+    E += ror27(A) +                                             \
+        (W[t] = ror31(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16])) +   \
+        ((B&C)|(D&(B|C))) + 0x8F1BBCDC;                         \
+    B = ror2(B);
+
+    for (; t < 60; t += 5) {
+        SHA_F3(A,B,C,D,E,t + 0);
+        SHA_F3(E,A,B,C,D,t + 1);
+        SHA_F3(D,E,A,B,C,t + 2);
+        SHA_F3(C,D,E,A,B,t + 3);
+        SHA_F3(B,C,D,E,A,t + 4);
+    }
+
+#undef SHA_F3
+
+#define SHA_F4(A,B,C,D,E,t)                                     \
+    E += ror27(A) +                                             \
+        (W[t] = ror31(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16])) +   \
+        (B^C^D) + 0xCA62C1D6;                                   \
+    B = ror2(B);
+
+    for (; t < 80; t += 5) {
+        SHA_F4(A,B,C,D,E,t + 0);
+        SHA_F4(E,A,B,C,D,t + 1);
+        SHA_F4(D,E,A,B,C,t + 2);
+        SHA_F4(C,D,E,A,B,t + 3);
+        SHA_F4(B,C,D,E,A,t + 4);
+    }
+
+#undef SHA_F4
+
+    ctx->state[0] += A;
+    ctx->state[1] += B;
+    ctx->state[2] += C;
+    ctx->state[3] += D;
+    ctx->state[4] += E;
+}
+
+void SHA_update(SHA_CTX* ctx, const void* data, int len) {
+    int i = ctx->count % sizeof(ctx->buf);
+    const uint8_t* p = (const uint8_t*)data;
+
+    ctx->count += len;
+
+    while (len > sizeof(ctx->buf) - i) {
+        memcpy(&ctx->buf.b[i], p, sizeof(ctx->buf) - i);
+        len -= sizeof(ctx->buf) - i;
+        p += sizeof(ctx->buf) - i;
+        SHA1_Transform(ctx);
+        i = 0;
+    }
+
+    while (len--) {
+        ctx->buf.b[i++] = *p++;
+        if (i == sizeof(ctx->buf)) {
+            SHA1_Transform(ctx);
+            i = 0;
+        }
+    }
+}
+
+
+const uint8_t* SHA_final(SHA_CTX* ctx) {
+    uint64_t cnt = ctx->count * 8;
+    int i;
+
+    SHA_update(ctx, (uint8_t*)"\x80", 1);
+    while ((ctx->count % sizeof(ctx->buf)) != (sizeof(ctx->buf) - 8)) {
+        SHA_update(ctx, (uint8_t*)"\0", 1);
+    }
+    for (i = 0; i < 8; ++i) {
+        uint8_t tmp = cnt >> ((7 - i) * 8);
+        SHA_update(ctx, &tmp, 1);
+    }
+
+    for (i = 0; i < 5; i++) {
+        ctx->buf.w[i] = bswap_32(ctx->state[i]);
+    }
+
+    return ctx->buf.b;
+}
+
+#else   // #if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)
+
+#define rol(bits, value) (((value) << (bits)) | ((value) >> (32 - (bits))))
+
+static void SHA1_transform(SHA_CTX *ctx) {
+    uint32_t W[80];
+    uint32_t A, B, C, D, E;
+    uint8_t *p = ctx->buf;
+    int t;
+
+    for(t = 0; t < 16; ++t) {
+        uint32_t tmp =  *p++ << 24;
+        tmp |= *p++ << 16;
+        tmp |= *p++ << 8;
+        tmp |= *p++;
+        W[t] = tmp;
+    }
+
+    for(; t < 80; t++) {
+        W[t] = rol(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
+    }
+
+    A = ctx->state[0];
+    B = ctx->state[1];
+    C = ctx->state[2];
+    D = ctx->state[3];
+    E = ctx->state[4];
+
+    for(t = 0; t < 80; t++) {
+        uint32_t tmp = rol(5,A) + E + W[t];
+
+        if (t < 20)
+            tmp += (D^(B&(C^D))) + 0x5A827999;
+        else if ( t < 40)
+            tmp += (B^C^D) + 0x6ED9EBA1;
+        else if ( t < 60)
+            tmp += ((B&C)|(D&(B|C))) + 0x8F1BBCDC;
+        else
+            tmp += (B^C^D) + 0xCA62C1D6;
+
+        E = D;
+        D = C;
+        C = rol(30,B);
+        B = A;
+        A = tmp;
+    }
+
+    ctx->state[0] += A;
+    ctx->state[1] += B;
+    ctx->state[2] += C;
+    ctx->state[3] += D;
+    ctx->state[4] += E;
+}
+
+void SHA_update(SHA_CTX *ctx, const void *data, int len) {
+    int i = ctx->count % sizeof(ctx->buf);
+    const uint8_t* p = (const uint8_t*)data;
+
+    ctx->count += len;
+
+    while (len--) {
+        ctx->buf[i++] = *p++;
+        if (i == sizeof(ctx->buf)) {
+            SHA1_transform(ctx);
+            i = 0;
+        }
+    }
+}
+const uint8_t *SHA_final(SHA_CTX *ctx) {
+    uint8_t *p = ctx->buf;
+    uint64_t cnt = ctx->count * 8;
+    int i;
+
+    SHA_update(ctx, (uint8_t*)"\x80", 1);
+    while ((ctx->count % sizeof(ctx->buf)) != (sizeof(ctx->buf) - 8)) {
+        SHA_update(ctx, (uint8_t*)"\0", 1);
+    }
+    for (i = 0; i < 8; ++i) {
+        uint8_t tmp = cnt >> ((7 - i) * 8);
+        SHA_update(ctx, &tmp, 1);
+    }
+
+    for (i = 0; i < 5; i++) {
+        uint32_t tmp = ctx->state[i];
+        *p++ = tmp >> 24;
+        *p++ = tmp >> 16;
+        *p++ = tmp >> 8;
+        *p++ = tmp >> 0;
+    }
+
+    return ctx->buf;
+}
+
+#endif // endianness
+
+void SHA_init(SHA_CTX* ctx) {
+    ctx->state[0] = 0x67452301;
+    ctx->state[1] = 0xEFCDAB89;
+    ctx->state[2] = 0x98BADCFE;
+    ctx->state[3] = 0x10325476;
+    ctx->state[4] = 0xC3D2E1F0;
+    ctx->count = 0;
+}
+
+/* Convenience function */
+const uint8_t* SHA(const void *data, int len, uint8_t *digest) {
+    const uint8_t *p;
+    int i;
+    SHA_CTX ctx;
+    SHA_init(&ctx);
+    SHA_update(&ctx, data, len);
+    p = SHA_final(&ctx);
+    for (i = 0; i < SHA_DIGEST_SIZE; ++i) {
+        digest[i] = *p++;
+    }
+    return digest;
+}
diff --git a/twmincrypt/twsha.h b/twmincrypt/twsha.h
new file mode 100644
index 0000000..af63e87
--- /dev/null
+++ b/twmincrypt/twsha.h
@@ -0,0 +1,63 @@
+/* sha.h
+**
+** Copyright 2008, The Android Open Source Project
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of Google Inc. nor the names of its contributors may
+**       be used to endorse or promote products derived from this software
+**       without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR
+** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+** EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef _EMBEDDED_SHA_H_
+#define _EMBEDDED_SHA_H_
+
+#include <inttypes.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct SHA_CTX {
+    uint64_t count;
+    uint32_t state[5];
+#if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)
+    union {
+        uint8_t b[64];
+        uint32_t w[16];
+    } buf;
+#else
+    uint8_t buf[64];
+#endif
+} SHA_CTX;
+
+void SHA_init(SHA_CTX* ctx);
+void SHA_update(SHA_CTX* ctx, const void* data, int len);
+const uint8_t* SHA_final(SHA_CTX* ctx);
+
+/* Convenience method. Returns digest parameter value. */
+const uint8_t* SHA(const void* data, int len, uint8_t* digest);
+
+#define SHA_DIGEST_SIZE 20
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif