/**
* Take a byte array and return the hex representation of its SHA-1 using the standard state
* values
*/
public static String encode(short[] shorts, boolean calculatePadding) {
// These are the default values
int[] stateValues = extractState("67452301EFCDAB8998BADCFE10325476C3D2E1F0");
checkAssertion(stateValues[0] == 1732584193);
checkAssertion(stateValues[1] == -271733879);
checkAssertion(stateValues[2] == -1732584194);
checkAssertion(stateValues[3] == 271733878);
checkAssertion(stateValues[4] == -1009589776);
return encode(shorts, stateValues, calculatePadding);
}
/**
* Extracts the state of a SHA-1 hash from a hex string containing 5 32-bit words
*
* @param state
* @return
*/
private static int[] extractState(String state) {
// Make sure the state isn't NULL
checkAssertion(state != null);
// Make sure the state is the correct length (40 characters)
checkAssertion(state.length() == 40);
// Extract the 5 32-bit words
int H0 = (int) Long.parseLong(state.substring(0, 8), 16);
int H1 = (int) Long.parseLong(state.substring(8, 16), 16);
int H2 = (int) Long.parseLong(state.substring(16, 24), 16);
int H3 = (int) Long.parseLong(state.substring(24, 32), 16);
int H4 = (int) Long.parseLong(state.substring(32, 40), 16);
// Put the 5 32-bit words into an array
int[] stateValues = new int[5];
stateValues[0] = H0;
stateValues[1] = H1;
stateValues[2] = H2;
stateValues[3] = H3;
stateValues[4] = H4;
return stateValues;
}
