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Irita open alliance chain SDK (java)
package irita.sdk.crypto;
import org.bouncycastle.util.StringList;
import org.bouncycastle.util.Strings;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
public class ArmoredInputStream extends InputStream {
private static final byte[] decodingTable = new byte[128];
InputStream in;
boolean start;
int[] outBuf;
int bufPtr;
CRC24 crc;
boolean crcFound;
boolean hasHeaders;
String header;
boolean newLineFound;
boolean clearText;
boolean restart;
StringList headerList;
int lastC;
boolean isEndOfStream;
private int decode(int var1, int var2, int var3, int var4, int[] var5) throws EOFException {
if (var4 < 0) {
throw new EOFException("unexpected end of file in armored stream.");
} else if (var3 == 61) {
int var10 = decodingTable[var1] & 255;
int var11 = decodingTable[var2] & 255;
var5[2] = (var10 << 2 | var11 >> 4) & 255;
return 2;
} else {
byte var6;
byte var7;
byte var8;
if (var4 == 61) {
var6 = decodingTable[var1];
var7 = decodingTable[var2];
var8 = decodingTable[var3];
var5[1] = (var6 << 2 | var7 >> 4) & 255;
var5[2] = (var7 << 4 | var8 >> 2) & 255;
return 1;
} else {
var6 = decodingTable[var1];
var7 = decodingTable[var2];
var8 = decodingTable[var3];
byte var9 = decodingTable[var4];
var5[0] = (var6 << 2 | var7 >> 4) & 255;
var5[1] = (var7 << 4 | var8 >> 2) & 255;
var5[2] = (var8 << 6 | var9) & 255;
return 0;
}
}
}
public ArmoredInputStream(InputStream var1) throws IOException {
this(var1, true);
}
public ArmoredInputStream(InputStream var1, boolean var2) throws IOException {
this.start = true;
this.outBuf = new int[3];
this.bufPtr = 3;
this.crc = new CRC24();
this.crcFound = false;
this.hasHeaders = true;
this.header = null;
this.newLineFound = false;
this.clearText = false;
this.restart = false;
this.headerList = Strings.newList();
this.lastC = 0;
this.in = var1;
this.hasHeaders = var2;
if (var2) {
this.parseHeaders();
}
this.start = false;
}
public int available() throws IOException {
return this.in.available();
}
private boolean parseHeaders() throws IOException {
this.header = null;
int var2 = 0;
boolean var3 = false;
this.headerList = Strings.newList();
int var1;
if (this.restart) {
var3 = true;
} else {
while((var1 = this.in.read()) >= 0) {
if (var1 == 45 && (var2 == 0 || var2 == 10 || var2 == 13)) {
var3 = true;
break;
}
var2 = var1;
}
}
if (var3) {
StringBuffer var4 = new StringBuffer("-");
boolean var5 = false;
boolean var6 = false;
if (this.restart) {
var4.append('-');
}
for(; (var1 = this.in.read()) >= 0; var2 = var1) {
if (var2 == 13 && var1 == 10) {
var6 = true;
}
if (var5 && var2 != 13 && var1 == 10 || var5 && var1 == 13) {
break;
}
if (var1 == 13 || var2 != 13 && var1 == 10) {
String var7 = var4.toString();
if (var7.trim().length() == 0) {
break;
}
this.headerList.add(var7);
var4.setLength(0);
}
if (var1 != 10 && var1 != 13) {
var4.append((char)var1);
var5 = false;
} else if (var1 == 13 || var2 != 13 && var1 == 10) {
var5 = true;
}
}
if (var6) {
this.in.read();
}
}
if (this.headerList.size() > 0) {
this.header = this.headerList.get(0);
}
this.clearText = "-----BEGIN PGP SIGNED MESSAGE-----".equals(this.header);
this.newLineFound = true;
return var3;
}
public boolean isClearText() {
return this.clearText;
}
public boolean isEndOfStream() {
return this.isEndOfStream;
}
public String getArmorHeaderLine() {
return this.header;
}
public String[] getArmorHeaders() {
return this.headerList.size() <= 1 ? null : this.headerList.toStringArray(1, this.headerList.size());
}
private int readIgnoreSpace() throws IOException {
int var1;
for(var1 = this.in.read(); var1 == 32 || var1 == 9; var1 = this.in.read()) {
}
return var1;
}
public int read() throws IOException {
if (this.start) {
if (this.hasHeaders) {
this.parseHeaders();
}
this.crc.reset();
this.start = false;
}
int var1;
if (this.clearText) {
var1 = this.in.read();
if (var1 != 13 && (var1 != 10 || this.lastC == 13)) {
if (this.newLineFound && var1 == 45) {
var1 = this.in.read();
if (var1 == 45) {
this.clearText = false;
this.start = true;
this.restart = true;
} else {
var1 = this.in.read();
}
this.newLineFound = false;
} else if (var1 != 10 && this.lastC != 13) {
this.newLineFound = false;
}
} else {
this.newLineFound = true;
}
this.lastC = var1;
if (var1 < 0) {
this.isEndOfStream = true;
}
return var1;
} else {
if (this.bufPtr > 2 || this.crcFound) {
var1 = this.readIgnoreSpace();
if (var1 != 13 && var1 != 10) {
if (var1 < 0) {
this.isEndOfStream = true;
return -1;
}
this.bufPtr = this.decode(var1, this.readIgnoreSpace(), this.readIgnoreSpace(), this.readIgnoreSpace(), this.outBuf);
} else {
for(var1 = this.readIgnoreSpace(); var1 == 10 || var1 == 13; var1 = this.readIgnoreSpace()) {
}
if (var1 < 0) {
this.isEndOfStream = true;
return -1;
}
if (var1 == 61) {
this.bufPtr = this.decode(this.readIgnoreSpace(), this.readIgnoreSpace(), this.readIgnoreSpace(), this.readIgnoreSpace(), this.outBuf);
if (this.bufPtr == 0) {
int var2 = (this.outBuf[0] & 255) << 16 | (this.outBuf[1] & 255) << 8 | this.outBuf[2] & 255;
this.crcFound = true;
if (var2 != this.crc.getValue()) {
throw new IOException("crc check failed in armored message.");
}
return this.read();
}
throw new IOException("no crc found in armored message.");
}
if (var1 == 45) {
while((var1 = this.in.read()) >= 0 && var1 != 10 && var1 != 13) {
}
if (!this.crcFound) {
throw new IOException("crc check not found.");
}
this.crcFound = false;
this.start = true;
this.bufPtr = 3;
if (var1 < 0) {
this.isEndOfStream = true;
}
return -1;
}
this.bufPtr = this.decode(var1, this.readIgnoreSpace(), this.readIgnoreSpace(), this.readIgnoreSpace(), this.outBuf);
}
}
var1 = this.outBuf[this.bufPtr++];
this.crc.update(var1);
return var1;
}
}
public void close() throws IOException {
this.in.close();
}
static {
int var0;
for(var0 = 65; var0 <= 90; ++var0) {
decodingTable[var0] = (byte)(var0 - 65);
}
for(var0 = 97; var0 <= 122; ++var0) {
decodingTable[var0] = (byte)(var0 - 97 + 26);
}
for(var0 = 48; var0 <= 57; ++var0) {
decodingTable[var0] = (byte)(var0 - 48 + 52);
}
decodingTable[43] = 62;
decodingTable[47] = 63;
}
}