Package co.ankatech.ankasecure.sdk.util

Class CryptoRandomProvider

java.lang.Object

co.ankatech.ankasecure.sdk.util.CryptoRandomProvider

public final class CryptoRandomProvider
extends Object

Centralized provider for cryptographically secure random number generation.

This class provides a singleton SecureRandom instance configured to use the JDK's NIST SP 800-90A Rev. 1 DRBG (Deterministic Random Bit Generator) when available. The instantiation requests only:

• 256-bit security strength
• the DrbgParameters.Capability.PR_AND_RESEED capability (prediction resistance and reseeding)
• no personalization string

The request names no DRBG mechanism. The mechanism and its underlying primitive are chosen by the provider from the securerandom.drbg.config security property of the JVM the SDK runs in; the JDK default is Hash_DRBG with SHA-256. getProviderInfo() reports the algorithm and provider actually obtained.

If DRBG is not available on the platform (e.g., older JVMs or Android), the provider falls back to SecureRandom.getInstanceStrong() or the platform's default SecureRandom.

This class mirrors the NIST DRBG pattern the ANKASecure server uses, ensuring consistent cryptographic random number generation across the platform.

Method Summary

Modifier and Type	Method	Description
static SecureRandom	get()	Returns the singleton SecureRandom instance.
static String	getProviderInfo()	Returns information about the underlying random provider.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

get

public static SecureRandom get()

Returns the singleton SecureRandom instance.

This instance is thread-safe and should be used for all cryptographic operations requiring secure random bytes.

Returns:

the singleton SecureRandom instance

getProviderInfo

public static String getProviderInfo()

Returns information about the underlying random provider.

Returns:

a string describing the algorithm and provider