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cryptix.jce.provider.md
Class RIPEMD
java.lang.Objectjava.security.MessageDigestSpi
- public final class RIPEMD
- extends PaddingMD
RIPEMD message digest algorithm as described in ISO/IEC 10118-3:1998 Information technology - Security techniques - Hash-functions - Part 3: Dedicated hash-functions. RIPEMD basically is a slightly modified version of MD4 with a set of parallel rounds added. It is not much more secure than MD4 and its use is not recommended for anything but compatibility with legacy applications. http://www.iso.ch/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=25428 http://link.springer.de/link/service/journals/00145/bibs/10n1p51.html http://www.ietf.org/rfc/rfc1320.txt
- Version:
- $Revision: 1.2 $
| Field Summary | |
private int[] |
context
4 32-bit words (interim result) |
private static int |
HASH_SIZE
Size (in bytes) of this hash |
(package private) static int |
MODE_MD
|
(package private) static int |
MODE_SHA
|
(package private) static int |
MODE_TIGER
|
private int[] |
savedContext
4 32-bit words (saved results) |
private int[] |
X
512 bits work buffer = 16 x 32-bit words |
| Constructor Summary | |
|
RIPEMD()
|
private |
RIPEMD(RIPEMD src)
|
| Method Summary | |
java.lang.Object |
clone()
Returns a clone of this class. |
protected void |
coreDigest(byte[] buf,
int off)
Return the hash bytes in buf, starting at offset
off. |
protected void |
coreReset()
Reset the hash internal structures to initial state. |
protected void |
coreUpdate(byte[] block,
int offset)
Update the internal state with a single block. |
protected byte[] |
engineDigest()
Computes the final digest of the stored bytes and returns them. |
protected int |
engineDigest(byte[] buf,
int offset,
int len)
Computes the final digest of the stored bytes and returns them. |
protected int |
engineGetDigestLength()
Returns the length of the digest. |
protected void |
engineReset()
Resets the digest engine. |
protected void |
engineUpdate(byte input)
Updates the digest with the specified byte. |
protected void |
engineUpdate(byte[] input,
int offset,
int length)
Updates the digest with the specified bytes starting with the offset and proceeding for the specified length. |
private int |
FF(int a,
int b,
int c,
int d,
int x,
int s)
|
private int |
FFP(int a,
int b,
int c,
int d,
int x,
int s)
|
private int |
GG(int a,
int b,
int c,
int d,
int x,
int s)
|
private int |
GGP(int a,
int b,
int c,
int d,
int x,
int s)
|
private int |
HH(int a,
int b,
int c,
int d,
int x,
int s)
|
private int |
HHP(int a,
int b,
int c,
int d,
int x,
int s)
|
| Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
HASH_SIZE
private static final int HASH_SIZE
- Size (in bytes) of this hash
- See Also:
- Constant Field Values
context
private int[] context
- 4 32-bit words (interim result)
savedContext
private int[] savedContext
- 4 32-bit words (saved results)
X
private int[] X
- 512 bits work buffer = 16 x 32-bit words
MODE_MD
static final int MODE_MD
- See Also:
- Constant Field Values
MODE_SHA
static final int MODE_SHA
- See Also:
- Constant Field Values
MODE_TIGER
static final int MODE_TIGER
- See Also:
- Constant Field Values
| Constructor Detail |
RIPEMD
public RIPEMD()
RIPEMD
private RIPEMD(RIPEMD src)
| Method Detail |
clone
public java.lang.Object clone()
- Description copied from class:
java.security.MessageDigestSpi - Returns a clone of this class.
If cloning is not supported, then by default the class throws a
CloneNotSupportedException. The MessageDigestSpi provider
implementation has to overload this class in order to be
cloneable.
coreDigest
protected void coreDigest(byte[] buf,
int off)
- Description copied from class:
PaddingMD - Return the hash bytes in
buf, starting at offsetoff. The subclass is expected to write exactlyhashSizebytes in the given buffer. The buffer is guaranteed to be large enough.- Specified by:
coreDigestin classPaddingMD
coreReset
protected void coreReset()
- Description copied from class:
PaddingMD - Reset the hash internal structures to initial state.
coreUpdate
protected void coreUpdate(byte[] block,
int offset)
- Description copied from class:
PaddingMD - Update the internal state with a single block.
bufcontains a single block (64 bytes, 512 bits) of data, starting at offsetoff.- Specified by:
coreUpdatein classPaddingMD
FF
private int FF(int a,
int b,
int c,
int d,
int x,
int s)
GG
private int GG(int a,
int b,
int c,
int d,
int x,
int s)
HH
private int HH(int a,
int b,
int c,
int d,
int x,
int s)
FFP
private int FFP(int a,
int b,
int c,
int d,
int x,
int s)
GGP
private int GGP(int a,
int b,
int c,
int d,
int x,
int s)
HHP
private int HHP(int a,
int b,
int c,
int d,
int x,
int s)
engineGetDigestLength
protected int engineGetDigestLength()
- Description copied from class:
java.security.MessageDigestSpi - Returns the length of the digest. It may be overridden by the
provider to return the length of the digest. Default is to
return 0. It is concrete for backwards compatibility with JDK1.1
message digest classes.
engineUpdate
protected void engineUpdate(byte input)
- Description copied from class:
java.security.MessageDigestSpi - Updates the digest with the specified byte.
engineUpdate
protected void engineUpdate(byte[] input,
int offset,
int length)
- Description copied from class:
java.security.MessageDigestSpi - Updates the digest with the specified bytes starting with the
offset and proceeding for the specified length.
engineDigest
protected byte[] engineDigest()
- Description copied from class:
java.security.MessageDigestSpi - Computes the final digest of the stored bytes and returns
them. It performs any necessary padding. The message digest
should reset sensitive data after performing the digest.
engineDigest
protected int engineDigest(byte[] buf,
int offset,
int len)
throws java.security.DigestException
- Description copied from class:
java.security.MessageDigestSpi - Computes the final digest of the stored bytes and returns
them. It performs any necessary padding. The message digest
should reset sensitive data after performing the digest. This
method is left concrete for backwards compatibility with JDK1.1
message digest classes.
engineReset
protected void engineReset()
- Description copied from class:
java.security.MessageDigestSpi - Resets the digest engine. Reinitializes internal variables
and clears sensitive data.
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DETAIL: FIELD | CONSTR | METHOD | ||||||||