package com.aegiswallet.utils;
public class SMSTools {
private static String number;
private static String message;
private static boolean numbertype; // national/international dialing number
public SMSTools(String no, boolean notype, String msg) {
number = no;
message = msg;
numbertype = notype;
}
/**
* Convert a dialing number into the GSM format
* @param number dialing number
* @return coded dialing number
*/
private static byte[] convertDialNumber(String number) {
int l = number.length();
int j = 0; // index in addr
int n; // length of converted dial number
byte[] data;
// calculate length of converted dialing number
n = l / 2;
if (l % 2 != 0) {
n++;
}
data = new byte[n];
for (int i = 0; i < n; i++) {
switch (number.charAt(j)) {
case '0': data[i] += 0x00; break;
case '1': data[i] += 0x01; break;
case '2': data[i] += 0x02; break;
case '3': data[i] += 0x03; break;
case '4': data[i] += 0x04; break;
case '5': data[i] += 0x05; break;
case '6': data[i] += 0x06; break;
case '7': data[i] += 0x07; break;
case '8': data[i] += 0x08; break;
case '9': data[i] += 0x09; break;
} // switch
if (j + 1 < l) {
switch (number.charAt(j + 1)) {
case '0': data[i] += 0x00; break;
case '1': data[i] += 0x10; break;
case '2': data[i] += 0x20; break;
case '3': data[i] += 0x30; break;
case '4': data[i] += 0x40; break;
case '5': data[i] += 0x50; break;
case '6': data[i] += 0x60; break;
case '7': data[i] += 0x70; break;
case '8': data[i] += 0x80; break;
case '9': data[i] += 0x90; break;
} // switch
} // if
else {
data[i] += 0xF0;
} // else
j += 2;
} // for
return data;
} // convertDialNumber
/**
* Convert a Unicode text string into the GSM standard alphabet
* @param msg text string in ASCII
* @return text string in GSM standard alphabet
*/
public static byte[] convertUnicode2GSM(String msg) {
byte[] data = new byte[msg.length()];
for (int i = 0; i < msg.length(); i++) {
switch (msg.charAt(i)) {
case '@': data[i] = 0x00; break;
case '$': data[i] = 0x02; break;
case '\n': data[i] = 0x0A; break;
case '\r': data[i] = 0x0D; break;
case '_': data[i] = 0x11; break;
case 'ß': data[i] = 0x1E; break;
case ' ': data[i] = 0x20; break;
case '!': data[i] = 0x21; break;
case '\"': data[i] = 0x22; break;
case '#': data[i] = 0x23; break;
case '%': data[i] = 0x25; break;
case '&': data[i] = 0x26; break;
case '\'': data[i] = 0x27; break;
case '(': data[i] = 0x28; break;
case ')': data[i] = 0x29; break;
case '*': data[i] = 0x2A; break;
case '+': data[i] = 0x2B; break;
case ',': data[i] = 0x2C; break;
case '-': data[i] = 0x2D; break;
case '.': data[i] = 0x2E; break;
case '/': data[i] = 0x2F; break;
case '0': data[i] = 0x30; break;
case '1': data[i] = 0x31; break;
case '2': data[i] = 0x32; break;
case '3': data[i] = 0x33; break;
case '4': data[i] = 0x34; break;
case '5': data[i] = 0x35; break;
case '6': data[i] = 0x36; break;
case '7': data[i] = 0x37; break;
case '8': data[i] = 0x38; break;
case '9': data[i] = 0x39; break;
case ':': data[i] = 0x3A; break;
case ';': data[i] = 0x3B; break;
case '<': data[i] = 0x3C; break;
case '=': data[i] = 0x3D; break;
case '>': data[i] = 0x3E; break;
case '?': data[i] = 0x3F; break;
case 'A': data[i] = 0x41; break;
case 'B': data[i] = 0x42; break;
case 'C': data[i] = 0x43; break;
case 'D': data[i] = 0x44; break;
case 'E': data[i] = 0x45; break;
case 'F': data[i] = 0x46; break;
case 'G': data[i] = 0x47; break;
case 'H': data[i] = 0x48; break;
case 'I': data[i] = 0x49; break;
case 'J': data[i] = 0x4A; break;
case 'K': data[i] = 0x4B; break;
case 'L': data[i] = 0x4C; break;
case 'M': data[i] = 0x4D; break;
case 'N': data[i] = 0x4E; break;
case 'O': data[i] = 0x4F; break;
case 'P': data[i] = 0x50; break;
case 'Q': data[i] = 0x51; break;
case 'R': data[i] = 0x52; break;
case 'S': data[i] = 0x53; break;
case 'T': data[i] = 0x54; break;
case 'U': data[i] = 0x55; break;
case 'V': data[i] = 0x56; break;
case 'W': data[i] = 0x57; break;
case 'X': data[i] = 0x58; break;
case 'Y': data[i] = 0x59; break;
case 'Z': data[i] = 0x5A; break;
case 'Ä': data[i] = 0x5B; break;
case 'Ö': data[i] = 0x5C; break;
case 'Ü': data[i] = 0x5E; break;
case '§': data[i] = 0x5F; break;
case 'a': data[i] = 0x61; break;
case 'b': data[i] = 0x62; break;
case 'c': data[i] = 0x63; break;
case 'd': data[i] = 0x64; break;
case 'e': data[i] = 0x65; break;
case 'f': data[i] = 0x66; break;
case 'g': data[i] = 0x67; break;
case 'h': data[i] = 0x68; break;
case 'i': data[i] = 0x69; break;
case 'j': data[i] = 0x6A; break;
case 'k': data[i] = 0x6B; break;
case 'l': data[i] = 0x6C; break;
case 'm': data[i] = 0x6D; break;
case 'n': data[i] = 0x6E; break;
case 'o': data[i] = 0x6F; break;
case 'p': data[i] = 0x70; break;
case 'q': data[i] = 0x71; break;
case 'r': data[i] = 0x72; break;
case 's': data[i] = 0x73; break;
case 't': data[i] = 0x74; break;
case 'u': data[i] = 0x75; break;
case 'v': data[i] = 0x76; break;
case 'w': data[i] = 0x77; break;
case 'x': data[i] = 0x78; break;
case 'y': data[i] = 0x79; break;
case 'z': data[i] = 0x7A; break;
case 'ä': data[i] = 0x7B; break;
case 'ö': data[i] = 0x7C; break;
case 'ü': data[i] = 0x7E; break;
default: data[i] = 0x3F; break; // '?'
} // switch
} // for
return data;
} // convertUnicode2GSM
/**
* Convert one GSM standard alphabet character into a Unicode character
* @param b one GSM standard alphabet character
* @return one Unicode character
*/
public static char convertGSM2Unicode(int b) {
char c;
if ((b >= 0x41) && (b <= 0x5A)) { // character is between "A" and "Z"
c = (char) b;
return c;
} // if
if ((b >= 0x61) && (b <= 0x7A)) { // character is between "a" and "z"
c = (char) b;
return c;
} // if
if ((b >= 0x30) && (b <= 0x39)) { // character is between "0" and "9"
c = (char) b;
return c;
} // if
switch (b) {
case 0x00 : c = '@'; break;
case 0x02 : c = '$'; break;
case 0x0A : c = '\n'; break;
case 0x0D : c = '\r'; break;
case 0x11 : c = '_'; break;
case 0x1E : c = 'ß'; break;
case 0x20 : c = ' '; break;
case 0x21 : c = '!'; break;
case 0x22 : c = '\"'; break;
case 0x23 : c = '#'; break;
case 0x25 : c = '%'; break;
case 0x26 : c = '&'; break;
case 0x27 : c = '\''; break;
case 0x28 : c = '('; break;
case 0x29 : c = ')'; break;
case 0x2A : c = '*'; break;
case 0x2B : c = '+'; break;
case 0x2C : c = ','; break;
case 0x2D : c = '-'; break;
case 0x2E : c = '.'; break;
case 0x2F : c = '/'; break;
case 0x3A : c = ':'; break;
case 0x3B : c = ';'; break;
case 0x3C : c = '<'; break;
case 0x3D : c = '='; break;
case 0x3E : c = '>'; break;
case 0x3F : c = '?'; break;
case 0x5B : c = 'Ä'; break;
case 0x5C : c = 'Ö'; break;
case 0x5E : c = 'Ü'; break;
case 0x5F : c = '§'; break;
case 0x7B : c = 'ä'; break;
case 0x7C : c = 'ö'; break;
case 0x7E : c = 'ü'; break;
default: c = '?'; break;
} // switch
return c;
} // convertGSM2Unicode
/**
* Compress a readable text message into the GSM standard alphabet
* (1 character -> 7 bit data)
* @param data text string in Unicode
* @return text string in GSM standard alphabet
*/
public static byte[] compress(byte[] data) {
int l;
int n; // length of compressed data
byte[] comp;
// calculate length of message
l = data.length;
n = (l * 7) / 8;
if ((l * 7) % 8 != 0) {
n++;
} // if
comp = new byte[n];
int j = 0; // index in data
int s = 0; // shift from next data byte
for (int i = 0; i < n; i++) {
comp[i] = (byte)((data[j] & 0x7F) >>> s);
s++;
if (j + 1 < l) {
comp[i] += (byte)((data[j + 1] << (8 - s)) & 0xFF);
} // if
if (s < 7) {
j++;
} // if
else {
s = 0;
j += 2;
} // else
} // for
return comp;
} // compress
/**
* Extracts from a given SMS the Text
* @param data ms SMS string
* @return text date, time and SMS text string in Unicode
*/
public static String getSMSText(String data) {
int i, x, n;
String s, date="", time="";
// delete LF at the end of the PDU
i = data.lastIndexOf("\n");
if (data.length()-1 == i) {
data = data.substring(0, i-1);
} // if
// delete the AT command information at the beginning of the PDU
i = data.lastIndexOf("\n");
data = data.substring(i+1, data.length());
s = data.substring(0, 2);
x = Integer.parseInt(s, 10); // get length [byte] of delivering SMSC number
i = 2 + x * 2; // set index to message header flags
i = i + 2; // set index to length [digits] of originating adress
s = data.substring(i, i+2); // get length [digits] of originating adress
x = Integer.parseInt(s, 10);
i = i + 2 + x * 2; // set index to data coding scheme
i = i + 2; // set index to date and time
// get data and time
date = data.substring(i+1, i+2) + data.substring(i, i+1) ; // get year
date = data.substring(i+3, i+4) + data.substring(i+2, i+3) + "." + date; // get month
date = data.substring(i+5, i+6) + data.substring(i+4, i+5) + "." + date; // get day
time = data.substring(i+11, i+12) + data.substring(i+10, i+11); // get hour
time = data.substring(i+9, i+10) + data.substring(i+8, i+9) + ":" + time; // get minute
time = data.substring(i+7, i+8) + data.substring(i+6, i+7) + ":" + time; // get second
i = i + 14; // set index to length of user data (=SMS)
s = data.substring(i, i+2); // get length of user data (=SMS)
x = Integer.parseInt(s, 16); // calculate length [characters] of user data (=SMS)
data = data.substring(i+2, data.length()); // delete the transport information at the beginning of the PDU
// copy SMS from a string into a byte array
byte sms[] = new byte[data.length()/2];
for (n = 0; n < data.length()/2; n++) {
s = data.substring(n*2, n*2+2);
sms[n] = (byte)(0x000000FF & Integer.parseInt(s, 16));
} // for
data = expand(sms);
data = date + " " + time + " " + data;
return data;
} // getSMSText
/**
* Expands a compressed GSM message in a readable text message
* (7 bit data -> 1 character)
* @param indata text string in GSM standard alphabet
* @return text string in Unicode
*/
public static String expand(byte[] indata) {
int x, n, y, Bytebefore, Bitshift;
String msg = new String("");
byte data[] = new byte[indata.length+1];
for (n = 1; n < data.length; n++) {
data[n] = indata[n-1];
}
Bytebefore = 0;
for (n = 1; n < data.length; n++) {
x = (int) (0x000000FF & data[n]); // get a byte from the SMS
Bitshift = (n-1) % 7; // calculate number of neccssary bit shifts
y = x;
y = y << Bitshift; // shift to get a conversion 7 bit compact GSM -> Unicode
y = y | Bytebefore; // add bits from the byte before this byte
y = y & 0x0000007F; // delete all bits except bit 7 ... 1 of the byte
msg = msg + convertGSM2Unicode(y); // conversion: 7 bit GSM character -> Unicode
if (Bitshift == 6) {
Bitshift = 1;
y = x;
y = y >>> Bitshift; // shift to get a conversion 7 bit compact GSM -> Unicode
y = y & 0x0000007F; // delete all bits except bit 7 ... 1 of the byte
msg = msg + convertGSM2Unicode(y); // conversion: 7 bit GSM character -> Unicode
Bytebefore = 0;
} // if
else {
Bytebefore = x;
Bitshift = 7 - Bitshift;
Bytebefore = Bytebefore >>> Bitshift; // shift to get a conversion 7 bit compact GSM -> Unicode
Bytebefore = Bytebefore & 0x000000FF; // mask for one byte
} // else
} // for
return msg;
} // expand
/**
* Convert data into a hex string
* @param data to convert
* @return in hex string converted data
*/
public static char[] toHexString(byte[] data) {
int l = data.length;
char[] hex = new char[2 * l];
int j = 0; // index in hex
for (int i = 0; i < data.length; i++) {
switch (data[i] & 0xF0) {
case 0x00: hex[j] = '0'; break;
case 0x10: hex[j] = '1'; break;
case 0x20: hex[j] = '2'; break;
case 0x30: hex[j] = '3'; break;
case 0x40: hex[j] = '4'; break;
case 0x50: hex[j] = '5'; break;
case 0x60: hex[j] = '6'; break;
case 0x70: hex[j] = '7'; break;
case 0x80: hex[j] = '8'; break;
case 0x90: hex[j] = '9'; break;
case 0xA0: hex[j] = 'A'; break;
case 0xB0: hex[j] = 'B'; break;
case 0xC0: hex[j] = 'C'; break;
case 0xD0: hex[j] = 'D'; break;
case 0xE0: hex[j] = 'E'; break;
case 0xF0: hex[j] = 'F'; break;
} // switch
j++;
switch (data[i] & 0x0F) {
case 0x00: hex[j] = '0'; break;
case 0x01: hex[j] = '1'; break;
case 0x02: hex[j] = '2'; break;
case 0x03: hex[j] = '3'; break;
case 0x04: hex[j] = '4'; break;
case 0x05: hex[j] = '5'; break;
case 0x06: hex[j] = '6'; break;
case 0x07: hex[j] = '7'; break;
case 0x08: hex[j] = '8'; break;
case 0x09: hex[j] = '9'; break;
case 0x0A: hex[j] = 'A'; break;
case 0x0B: hex[j] = 'B'; break;
case 0x0C: hex[j] = 'C'; break;
case 0x0D: hex[j] = 'D'; break;
case 0x0E: hex[j] = 'E'; break;
case 0x0F: hex[j] = 'F'; break;
} // switch
j++;
} // for
return hex;
} // toHexString
} // SMSTools