|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object org.bouncycastle.crypto.digests.GeneralDigest org.bouncycastle.crypto.digests.SHA1Digest
public class SHA1Digest
implementation of SHA-1 as outlined in "Handbook of Applied Cryptography", pages 346 - 349. It is interesting to ponder why the, apart from the extra IV, the other difference here from MD5 is the "endienness" of the word processing!
Field Summary | |
---|---|
private static int |
DIGEST_LENGTH
|
private int |
H1
|
private int |
H2
|
private int |
H3
|
private int |
H4
|
private int |
H5
|
private int[] |
X
|
private int |
xOff
|
private static int |
Y1
|
private static int |
Y2
|
private static int |
Y3
|
private static int |
Y4
|
Constructor Summary | |
---|---|
SHA1Digest()
Standard constructor |
|
SHA1Digest(SHA1Digest t)
Copy constructor. |
Method Summary | |
---|---|
int |
doFinal(byte[] out,
int outOff)
close the digest, producing the final digest value. |
private int |
f(int u,
int v,
int w)
|
private int |
g(int u,
int v,
int w)
|
java.lang.String |
getAlgorithmName()
return the algorithm name |
int |
getDigestSize()
return the size, in bytes, of the digest produced by this message digest. |
private int |
h(int u,
int v,
int w)
|
protected void |
processBlock()
|
protected void |
processLength(long bitLength)
|
protected void |
processWord(byte[] in,
int inOff)
|
void |
reset()
reset the chaining variables |
private void |
unpackWord(int word,
byte[] out,
int outOff)
|
Methods inherited from class org.bouncycastle.crypto.digests.GeneralDigest |
---|
finish, getByteLength, update, update |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
private static final int DIGEST_LENGTH
private int H1
private int H2
private int H3
private int H4
private int H5
private int[] X
private int xOff
private static final int Y1
private static final int Y2
private static final int Y3
private static final int Y4
Constructor Detail |
---|
public SHA1Digest()
public SHA1Digest(SHA1Digest t)
Method Detail |
---|
public java.lang.String getAlgorithmName()
Digest
public int getDigestSize()
Digest
protected void processWord(byte[] in, int inOff)
processWord
in class GeneralDigest
private void unpackWord(int word, byte[] out, int outOff)
protected void processLength(long bitLength)
processLength
in class GeneralDigest
public int doFinal(byte[] out, int outOff)
Digest
out
- the array the digest is to be copied into.outOff
- the offset into the out array the digest is to start at.public void reset()
reset
in interface Digest
reset
in class GeneralDigest
private int f(int u, int v, int w)
private int h(int u, int v, int w)
private int g(int u, int v, int w)
protected void processBlock()
processBlock
in class GeneralDigest
|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |