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Link to figures in Java Cryptography Architecture (JCA) Reference Guide

Link to figures in How to Implement a Provider

Figure 1a Provider searching

This image consists of five cylinders that represent the following:

• Application
• Provider Framework
• ProviderA: Message digest implementations SHA384 and SHA512
• ProviderB: Message digest implementations SHA256 and SHA384
• ProviderC: Message digest implementations SHA256 and SHA512

An arrow representing a call to MessageDigest.getInstance("SHA-256") starts from the Application cylinder and passes through the following cylinders in the indicated order:

1. Provider Framework
2. ProviderA
3. ProviderB
4. Provider Framework

The arrow ends at the Application cylinder. The call to MessageDigest.getInstance("SHA-256") has returned a SHA-256 message digest implementation from ProviderB.

Figure 1b Specific provider requested

This image consists of five cylinders that represent the following:

• Application
• Provider Framework
• ProviderA: Message digest implementations SHA384 and SHA512
• ProviderB: Message digest implementations SHA256 and SHA384
• ProviderC: Message digest implementations SHA256 and SHA512

An arrow representing a call to MessageDigest.getInstance("SHA-256", "ProviderC") starts from the Application cylinder and passes through the following cylinders in the indicated order:

1. Provider Framework
2. ProviderC
3. Provider Framework

The arrow ends at the Application cylinder. The call to MessageDigest.getInstance("SHA-256", "ProviderC") has returned a SHA-256 message digest implementation from ProviderC.