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| <h2 title="Class SecretKeyAccess" class="title">Class SecretKeyAccess</h2> |
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| <li>com.google.crypto.tink.SecretKeyAccess</li> |
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| <pre>@CheckReturnValue |
| <a href="../../../../com/google/crypto/tink/annotations/Alpha.html" title="annotation in com.google.crypto.tink.annotations">@Alpha</a> |
| @Immutable |
| public final class <span class="typeNameLabel">SecretKeyAccess</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Represents access to secret key material. |
| |
| <p>Tink restricts access to secret key material, and users who require such access need to have |
| an object of the class <code>SecretKeyAccess</code> to do this. For example, a function that outputs |
| individiual key bytes might look like this: |
| |
| <pre> |
| class HmacKey { |
| ... |
| public byte[] getKeyMaterial(SecretKeyAccess access) { |
| checkNotNull(access); |
| return keyMaterial; |
| } |
| } |
| </pre> |
| |
| Users who want to call <code>getKeyMaterial</code> then need to get a <code>SecretKeyAccess</code> object |
| via <code>InsecureSecretKeyAccess.get()</code>.</div> |
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| <td class="colFirst"><code>static <a href="../../../../com/google/crypto/tink/SecretKeyAccess.html" title="class in com.google.crypto.tink">SecretKeyAccess</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/google/crypto/tink/SecretKeyAccess.html#requireAccess-com.google.crypto.tink.SecretKeyAccess-">requireAccess</a></span>(<a href="../../../../com/google/crypto/tink/SecretKeyAccess.html" title="class in com.google.crypto.tink">SecretKeyAccess</a> access)</code> |
| <div class="block">Throws an exception if the passed in <a href="../../../../com/google/crypto/tink/SecretKeyAccess.html" title="class in com.google.crypto.tink"><code>SecretKeyAccess</code></a> is null, otherwise returns it.</div> |
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| <h4>requireAccess</h4> |
| <pre>@CanIgnoreReturnValue |
| public static <a href="../../../../com/google/crypto/tink/SecretKeyAccess.html" title="class in com.google.crypto.tink">SecretKeyAccess</a> requireAccess(<a href="https://docs.oracle.com/javase/8/docs/api/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</a> |
| <a href="../../../../com/google/crypto/tink/SecretKeyAccess.html" title="class in com.google.crypto.tink">SecretKeyAccess</a> access) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/security/GeneralSecurityException.html?is-external=true" title="class or interface in java.security">GeneralSecurityException</a></pre> |
| <div class="block">Throws an exception if the passed in <a href="../../../../com/google/crypto/tink/SecretKeyAccess.html" title="class in com.google.crypto.tink"><code>SecretKeyAccess</code></a> is null, otherwise returns it. |
| |
| <p>Note: Tink has two types of APIs, some which take a nullable <code>SecretKeyAccess</code>, and |
| some which take a <code>SecretKeyAccess</code> without annotation. When an API takes a nullable |
| <code>SecretKeyAccess</code>, this indicates that proper usage may call it with <code>null</code>, hence |
| we typically want to throw a checked exception and <code>requireAccess</code> here is appropriate. |
| Conversely, if an API takes an unannotated <code>SecretKeyAccess</code>, this indicates that the API |
| always requires a non-null object. In this case, using it with null warrants should usually |
| throw a null pointer exception (and one does not want to use <code>requireAccess</code>).</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/security/GeneralSecurityException.html?is-external=true" title="class or interface in java.security">GeneralSecurityException</a></code></dd> |
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