Package org.acplt.oncrpc.apps.jrpcgen
Class JrpcgenSHA
java.lang.Object
org.acplt.oncrpc.apps.jrpcgen.JrpcgenSHA
This class implements the SHA-1 algorithm as described in
"Federal Information Processing Standards Publication 180-1:
Specifications for the Secure Hash Standard. April 17, 1995."
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Field Summary
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionbyte[]
Retrieve the digest (that is, informally spoken, the "hash value").long
getHash()
Return first 64 bits of hash digest for use as a serialization UID, etc.private void
process()
Process a single block.void
reset()
Reset the hashing engine to start hashing another set of innocent bytes.void
update
(byte b) Update the hash using a single byte (8 bits).void
update
(int i) Update the hash using an integer (32 bits).void
update
(short s) Update the hash using a short integer (16 bits).void
Update the hash using a string.
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Field Details
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W
private final int[] WWork buffer for calculating the hash. -
bytecount
private long bytecount -
H0
private int H0 -
H1
private int H1 -
H2
private int H2 -
H3
private int H3 -
H4
private int H4
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Constructor Details
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JrpcgenSHA
public JrpcgenSHA()Create a new SHA-1 hashing object.
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Method Details
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update
public void update(byte b) Update the hash using a single byte (8 bits).- Parameters:
b
- Byte to hash.
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update
public void update(short s) Update the hash using a short integer (16 bits).- Parameters:
s
- Short integer to hash.
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update
public void update(int i) Update the hash using an integer (32 bits).- Parameters:
i
- Integer to hash.
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update
Update the hash using a string.- Parameters:
s
- String to hash.
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reset
public void reset()Reset the hashing engine to start hashing another set of innocent bytes. -
getDigest
public byte[] getDigest()Retrieve the digest (that is, informally spoken, the "hash value").- Returns:
- digest as a series of 20 bytes (80 bits).
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getHash
public long getHash()Return first 64 bits of hash digest for use as a serialization UID, etc.- Returns:
- hash digest with only 64 bit size.
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process
private void process()Process a single block. This is pretty much copied verbatim from "Federal Information Processing Standards Publication 180-1: Specifications for the Secure Hash Standard. April 17, 1995.", pp. 9, 10.
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