Program: 171901
Project: 171901
Buggy source:
/** 
 * An ECDSA signature consists of two integers r and s, each of the bit length equal to the curve size. When Java is creating an ECDSA signature, it is encoding it in the DER (Distinguished Encoding Rules) format. But in ISO 15118, we do not expect DER encoded signatures. Thus, this function takes the DER encoded signature as input and returns the raw r and s integer values of the signature. 
 * @param derEncodedSignature The DER encoded signature as a result from java.security.Signature.sign()
 * @return A byte array containing only the r and s value of the signature
 */
public static byte[] getRawSignatureFromDEREncoding(byte[] derEncodedSignature){
  ByteArrayOutputStream baos=new ByteArrayOutputStream();
  byte[] r=new byte[32];
  byte[] s=new byte[32];
  int lengthOfR=derEncodedSignature[3];
  int lengthOfS=derEncodedSignature[lengthOfR + 5];
  try {
    if (lengthOfR == 33)     System.arraycopy(derEncodedSignature,5,r,0,32);
 else     System.arraycopy(derEncodedSignature,4,r,0,32);
    if (lengthOfS == 33)     System.arraycopy(derEncodedSignature,lengthOfR + 7,s,0,32);
 else     System.arraycopy(derEncodedSignature,lengthOfR + 6,s,0,32);
  }
 catch (  ArrayIndexOutOfBoundsException e) {
    getLogger().warn("String_Node_Str",e);
  }
  try {
    baos.write(r);
    baos.write(s);
  }
 catch (  IOException e) {
    e.printStackTrace();
  }
  byte[] rawRAndS=baos.toByteArray();
  return rawRAndS;
}

Fixed version (ground truth):
/** 
 * An ECDSA signature consists of two positive integers r and s, each of the bit length equal to the curve size. When Java is creating an ECDSA signature, it is encoding it in the DER (Distinguished Encoding Rules) format. But in ISO 15118, we do not expect DER encoded signatures. Thus, this function takes the DER encoded signature as input and returns the raw r and s integer values of the signature.  See further explanations in the @getDEREncodedSignature function for DER encoded ECDSA signatures.
 * @param derEncodedSignature The DER encoded signature as a result from java.security.Signature.sign()
 * @return A byte array containing only the r and s value of the signature
 */
public static byte[] getRawSignatureFromDEREncoding(byte[] derEncodedSignature){
  ByteArrayOutputStream baos=new ByteArrayOutputStream();
  byte[] r=new byte[32];
  byte[] s=new byte[32];
  int lengthOfR=derEncodedSignature[3];
  int lengthOfS=derEncodedSignature[lengthOfR + 5];
  try {
    if (lengthOfR == 33)     System.arraycopy(derEncodedSignature,5,r,0,lengthOfR - 1);
 else     if (lengthOfR == 32)     System.arraycopy(derEncodedSignature,4,r,0,lengthOfR);
 else     System.arraycopy(derEncodedSignature,4,r,32 - lengthOfR,lengthOfR);
    if (lengthOfS == 33)     System.arraycopy(derEncodedSignature,lengthOfR + 7,s,0,lengthOfS - 1);
 else     if (lengthOfS == 32)     System.arraycopy(derEncodedSignature,lengthOfR + 6,s,0,lengthOfS);
 else     System.arraycopy(derEncodedSignature,lengthOfR + 6,s,32 - lengthOfS,lengthOfS);
  }
 catch (  ArrayIndexOutOfBoundsException e) {
    getLogger().error("String_Node_Str",e);
  }
  try {
    baos.write(r);
    baos.write(s);
  }
 catch (  IOException e) {
    getLogger().error("String_Node_Str",e);
  }
  byte[] rawRAndS=baos.toByteArray();
  if (showSignatureVerificationLog) {
    StringBuilder sb=new StringBuilder();
    sb.append("String_Node_Str").append(System.lineSeparator());
    sb.append("String_Node_Str").append(ByteUtils.toHexString(derEncodedSignature)).append(System.lineSeparator());
    sb.append("String_Node_Str").append(ByteUtils.toHexString(r)).append(System.lineSeparator());
    sb.append("String_Node_Str").append(ByteUtils.toHexString(s)).append(System.lineSeparator());
    sb.append("String_Node_Str").append(ByteUtils.toHexString(rawRAndS));
    getLogger().debug(sb.toString());
  }
  return rawRAndS;
}