| java.lang.Object
 com.sun.midp.crypto.SecureRandom
All known Subclasses: com.sun.midp.crypto.PRand,
| SecureRandom | | abstract public class SecureRandom (Code) | | Implements an abstract class that generalizes random number
generators.
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| Field Summary | |
| final public static byte | ALG_PSEUDO_RANDOM
Identifies a utility pseudo random number generation algorithm. | | final public static byte | ALG_SECURE_RANDOM
Identifies a cryptographically secure random number generation
algorithm. |
| Constructor Summary | |
| protected | SecureRandom()
Protected constructor for subclassing. |
| Method Summary | |
| public static SecureRandom | getInstance(byte alg)
Creates a RandomData instance of the selected algorithm. | | abstract public void | nextBytes(byte[] buf, int off, int len)
Generates the next bytes of random data. | | abstract public void | setSeed(byte[] buf, int off, int len)
Seeds the random number generator. |
| ALG_PSEUDO_RANDOM | | final public static byte ALG_PSEUDO_RANDOM(Code) | | Identifies a utility pseudo random number generation algorithm.
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| ALG_SECURE_RANDOM | | final public static byte ALG_SECURE_RANDOM(Code) | | Identifies a cryptographically secure random number generation
algorithm.
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| SecureRandom | | protected SecureRandom()(Code) | | Protected constructor for subclassing.
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| getInstance | | public static SecureRandom getInstance(byte alg) throws NoSuchAlgorithmException(Code) | | Creates a RandomData instance of the selected algorithm.
WARNING: Requests for a secure random number generator
are currently redirected to a class that implements a weakly
unpredictable source of random data. Licensees of this reference
implementation are strongly urged to link requests for
ALG_SECURE_RANDOM to better generators that may be available
on their specific platforms.
Parameters:
alg - the desired random number generation algorithm, e.g. ALG_PSEUDO_RANDOM a RandomData instance implementing the selected algorithm.
exception:
NoSuchAlgorithmException - if an unsupported algorithm isrequested. |
| nextBytes | | abstract public void nextBytes(byte[] buf, int off, int len)(Code) | | Generates the next bytes of random data.
Parameters:
buf - output buffer in which the random data is to be placed
Parameters:
off - starting offset within buf for the random data
Parameters:
len - number of bytes of random data to be placed in buf |
| setSeed | | abstract public void setSeed(byte[] buf, int off, int len)(Code) | | Seeds the random number generator.
Parameters:
buf - input buffer containing the seed
Parameters:
off - offset within buf where the seed starts
Parameters:
len - number of bytes of seed data in buf |
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