| java.lang.Object
 java.security.MessageDigestSpi
org.apache.harmony.security.provider.crypto.SHA1_MessageDigestImpl
| SHA1_MessageDigestImpl | | public class SHA1_MessageDigestImpl extends MessageDigestSpi implements Cloneable,SHA1_Data(Code) | | This class extends the MessageDigestSpi class implementing all its abstract methods;
it overrides the "Object clone()" and "int engineGetDigestLength()" methods.
The class implements the Cloneable interface.
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| Method Summary | |
| public Object | clone()
Returns a "deep" copy of this SHA1MDImpl object. | | protected byte[] | engineDigest()
Computes a message digest value. | | protected int | engineDigest(byte[] buf, int offset, int len)
Computes message digest value.
Upon return, the value is stored in "buf" buffer beginning "offset" byte. | | protected int | engineGetDigestLength()
Returns a message digest length. | | protected void | engineReset()
Resets the engine. | | protected void | engineUpdate(byte input)
Supplements a byte to current message. | | protected void | engineUpdate(byte[] input, int offset, int len)
Updates current message. |
| SHA1_MessageDigestImpl | | public SHA1_MessageDigestImpl()(Code) | | The constructor creates needed buffers and sets the engine at initial state
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| engineDigest | | protected byte[] engineDigest()(Code) | | Computes a message digest value.
The method resets the engine.
The method overrides "engineDigest()" in class MessageDigestSpi.
byte array containing message digest value |
| engineDigest | | protected int engineDigest(byte[] buf, int offset, int len) throws DigestException(Code) | | Computes message digest value.
Upon return, the value is stored in "buf" buffer beginning "offset" byte.
The method resets the engine.
The method overrides "engineDigest(byte[],int,int) in class MessageDigestSpi.
Parameters:
buf - byte array to store a message digest returned
Parameters:
offset - a position in the array for first byte of the message digest
Parameters:
len - number of bytes within buffer allotted for the message digest; as this implementation doesn't provide partial digests, len should be >= 20, DigestException is thrown otherwise the length of the message digest stored in the "buf" buffer; in this implementation the length=20
throws:
IllegalArgumentException - if null is passed to the "buf" argument
if offset + len > buf.length
if offset > buf.length or len > buf.length
throws:
DigestException - if len < 20
throws:
ArrayIndexOutOfBoundsException - if offset < 0 |
| engineGetDigestLength | | protected int engineGetDigestLength()(Code) | | Returns a message digest length.
The method overrides "engineGetDigestLength()" in class MessageDigestSpi.
total length of current message digest as an int value |
| engineReset | | protected void engineReset()(Code) | | Resets the engine.
The method overrides "engineReset()" in class MessageDigestSpi.
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| engineUpdate | | protected void engineUpdate(byte input)(Code) | | Supplements a byte to current message.
The method overrides "engineUpdate(byte)" in class MessageDigestSpi.
Parameters:
input - byte to add to current message |
| engineUpdate | | protected void engineUpdate(byte[] input, int offset, int len)(Code) | | Updates current message.
The method overrides "engineUpdate(byte[],int,int)" in class MessageDigestSpi.
The method silently returns if "len" <= 0.
Parameters:
input - a byte array
Parameters:
offset - a number of first byte in the "input" array to use for updating
Parameters:
len - a number of bytes to use
throws:
NullPointerException - if null is passed to the "buf" argument
throws:
IllegalArgumentException - if offset > buf.length or len > buf.length or (len + offset) > buf.length
throws:
ArrayIndexOutOfBoundsException - offset < 0 |
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