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Cipher.xml
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Cipher.xml
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<Type Name="Cipher" FullName="Javax.Crypto.Cipher">
<TypeSignature Language="C#" Value="public class Cipher : Java.Lang.Object" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit Cipher extends Java.Lang.Object" />
<TypeSignature Language="DocId" Value="T:Javax.Crypto.Cipher" />
<TypeSignature Language="F#" Value="type Cipher = class
 inherit Object" />
<AssemblyInfo>
<AssemblyName>Mono.Android</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Base>
<BaseTypeName>Java.Lang.Object</BaseTypeName>
</Base>
<Interfaces />
<Attributes>
<Attribute>
<AttributeName Language="C#">[Android.Runtime.Register("javax/crypto/Cipher", DoNotGenerateAcw=true)]</AttributeName>
<AttributeName Language="F#">[<Android.Runtime.Register("javax/crypto/Cipher", DoNotGenerateAcw=true)>]</AttributeName>
</Attribute>
</Attributes>
<Docs since="1">
<summary>This class provides the functionality of a cryptographic cipher for
encryption and decryption.</summary>
<remarks>
<para>This class provides the functionality of a cryptographic cipher for
encryption and decryption. It forms the core of the Java Cryptographic
Extension (JCE) framework.</para>
<para>In order to create a Cipher object, the application calls the
Cipher's <c>getInstance</c> method, and passes the name of the
requested <i>transformation</i> to it. Optionally, the name of a provider
may be specified.</para>
<para>A <i>transformation</i> is a string that describes the operation (or
set of operations) to be performed on the given input, to produce some
output. A transformation always includes the name of a cryptographic
algorithm (e.g., <i>DES</i>), and may be followed by a feedback mode and
padding scheme.</para>
<para>A transformation is of the form:
<ul>
<li>"<i>algorithm/mode/padding</i>" or
<li>"<i>algorithm</i>"
</ul></para>
<para>(in the latter case,
provider-specific default values for the mode and padding scheme are used).
For example, the following is a valid transformation:</para>
<code lang="text/java">{@code
Cipher c = Cipher.getInstance("DES/CBC/PKCS5Padding");
}</code>
<para>Using modes such as <c>CFB</c> and <c>OFB</c>, block
ciphers can encrypt data in units smaller than the cipher's actual
block size. When requesting such a mode, you may optionally specify
the number of bits to be processed at a time by appending this number
to the mode name as shown in the "<c>DES/CFB8/NoPadding</c>" and
"<c>DES/OFB32/PKCS5Padding</c>" transformations. If no such
number is specified, a provider-specific default is used. (For
example, the SunJCE provider uses a default of 64 bits for DES.)
Thus, block ciphers can be turned into byte-oriented stream ciphers by
using an 8 bit mode such as CFB8 or OFB8.</para>
<para>Modes such as Authenticated Encryption with Associated Data (AEAD)
provide authenticity assurances for both confidential data and
Additional Associated Data (AAD) that is not encrypted. (Please see
<see href="http://www.ietf.org/rfc/rfc5116.txt"> RFC 5116 </see> for more
information on AEAD and AEAD algorithms such as GCM/CCM.) Both
confidential and AAD data can be used when calculating the
authentication tag (similar to a <c>Mac</c>). This tag is appended
to the ciphertext during encryption, and is verified on decryption.</para>
<para>AEAD modes such as GCM/CCM perform all AAD authenticity calculations
before starting the ciphertext authenticity calculations. To avoid
implementations having to internally buffer ciphertext, all AAD data
must be supplied to GCM/CCM implementations (via the <c>updateAAD</c> methods) <b>before</b> the ciphertext is processed (via
the <c>update</c> and <c>doFinal</c> methods).</para>
<para>Note that GCM mode has a uniqueness requirement on IVs used in
encryption with a given key. When IVs are repeated for GCM
encryption, such usages are subject to forgery attacks. Thus, after
each encryption operation using GCM mode, callers should re-initialize
the cipher objects with GCM parameters which has a different IV value.</para>
<code lang="text/java">GCMParameterSpec s = ...;
cipher.init(..., s);
// If the GCM parameters were generated by the provider, it can
// be retrieved by:
// cipher.getParameters().getParameterSpec(GCMParameterSpec.class);
cipher.updateAAD(...); // AAD
cipher.update(...); // Multi-part update
cipher.doFinal(...); // conclusion of operation
// Use a different IV value for every encryption
byte[] newIv = ...;
s = new GCMParameterSpec(s.getTLen(), newIv);
cipher.init(..., s);
...
</code>
<para>Android provides the following <c>Cipher</c> transformations:
<table>
<thead>
<tr>
<th>Algorithm</th>
<th>Modes</th>
<th>Paddings</th>
<th>Supported API Levels</th>
<th>Notes</th>
</tr>
</thead>
<tbody>
<tr>
<td rowspan="2"><span style="white-space: nowrap">AES</span></td>
<td><span style="white-space: nowrap">CBC</span><br><span style="white-space: nowrap">CFB</span><br><span style="white-space: nowrap">CTR</span><br><span style="white-space: nowrap">CTS</span><br><span style="white-space: nowrap">ECB</span><br><span style="white-space: nowrap">OFB</span></td>
<td><span style="white-space: nowrap">ISO10126Padding</span><br><span style="white-space: nowrap">NoPadding</span><br><span style="white-space: nowrap">PKCS5Padding</span></td>
<td><span style="white-space: nowrap">1+</span></td>
<td></td>
</tr>
<tr>
<td><span style="white-space: nowrap">GCM</span></td>
<td><span style="white-space: nowrap">NoPadding</span></td>
<td><span style="white-space: nowrap">10+</span></td>
<td></td>
</tr>
<tr>
<td rowspan="2"><span style="white-space: nowrap">AES_128</span></td>
<td><span style="white-space: nowrap">CBC</span><br><span style="white-space: nowrap">ECB</span></td>
<td><span style="white-space: nowrap">NoPadding</span><br><span style="white-space: nowrap">PKCS5Padding</span></td>
<td><span style="white-space: nowrap">26+</span></td>
<td></td>
</tr>
<tr>
<td><span style="white-space: nowrap">GCM</span></td>
<td><span style="white-space: nowrap">NoPadding</span></td>
<td><span style="white-space: nowrap">26+</span></td>
<td></td>
</tr>
<tr>
<td rowspan="2"><span style="white-space: nowrap">AES_256</span></td>
<td><span style="white-space: nowrap">CBC</span><br><span style="white-space: nowrap">ECB</span></td>
<td><span style="white-space: nowrap">NoPadding</span><br><span style="white-space: nowrap">PKCS5Padding</span></td>
<td><span style="white-space: nowrap">26+</span></td>
<td></td>
</tr>
<tr>
<td><span style="white-space: nowrap">GCM</span></td>
<td><span style="white-space: nowrap">NoPadding</span></td>
<td><span style="white-space: nowrap">26+</span></td>
<td></td>
</tr>
<tr>
<td rowspan="2"><span style="white-space: nowrap">ARC4</span></td>
<td><span style="white-space: nowrap">ECB</span></td>
<td><span style="white-space: nowrap">NoPadding</span></td>
<td><span style="white-space: nowrap">10+</span></td>
<td></td>
</tr>
<tr>
<td><span style="white-space: nowrap">NONE</span></td>
<td><span style="white-space: nowrap">NoPadding</span></td>
<td><span style="white-space: nowrap">28+</span></td>
<td></td>
</tr>
<tr>
<td><span style="white-space: nowrap">BLOWFISH</span></td>
<td><span style="white-space: nowrap">CBC</span><br><span style="white-space: nowrap">CFB</span><br><span style="white-space: nowrap">CTR</span><br><span style="white-space: nowrap">CTS</span><br><span style="white-space: nowrap">ECB</span><br><span style="white-space: nowrap">OFB</span></td>
<td><span style="white-space: nowrap">ISO10126Padding</span><br><span style="white-space: nowrap">NoPadding</span><br><span style="white-space: nowrap">PKCS5Padding</span></td>
<td><span style="white-space: nowrap">10+</span></td>
<td></td>
</tr>
<tr>
<td><span style="white-space: nowrap">ChaCha20</span></td>
<td><span style="white-space: nowrap">NONE</span><br><span style="white-space: nowrap">Poly1305</span></td>
<td><span style="white-space: nowrap">NoPadding</span></td>
<td><span style="white-space: nowrap">28+</span></td>
<td>ChaCha with 20 rounds, 96-bit nonce, and 32-bit counter as described in RFC 7539.</td>
</tr>
<tr>
<td><span style="white-space: nowrap">DES</span></td>
<td><span style="white-space: nowrap">CBC</span><br><span style="white-space: nowrap">CFB</span><br><span style="white-space: nowrap">CTR</span><br><span style="white-space: nowrap">CTS</span><br><span style="white-space: nowrap">ECB</span><br><span style="white-space: nowrap">OFB</span></td>
<td><span style="white-space: nowrap">ISO10126Padding</span><br><span style="white-space: nowrap">NoPadding</span><br><span style="white-space: nowrap">PKCS5Padding</span></td>
<td><span style="white-space: nowrap">1+</span></td>
<td></td>
</tr>
<tr>
<td><span style="white-space: nowrap">DESede</span></td>
<td><span style="white-space: nowrap">CBC</span><br><span style="white-space: nowrap">CFB</span><br><span style="white-space: nowrap">CTR</span><br><span style="white-space: nowrap">CTS</span><br><span style="white-space: nowrap">ECB</span><br><span style="white-space: nowrap">OFB</span></td>
<td><span style="white-space: nowrap">ISO10126Padding</span><br><span style="white-space: nowrap">NoPadding</span><br><span style="white-space: nowrap">PKCS5Padding</span></td>
<td><span style="white-space: nowrap">1+</span></td>
<td></td>
</tr>
<tr>
<td rowspan="3"><span style="white-space: nowrap">RSA</span></td>
<td rowspan="3"><span style="white-space: nowrap">ECB</span><br><span style="white-space: nowrap">NONE</span></td>
<td><span style="white-space: nowrap">NoPadding</span><br><span style="white-space: nowrap">OAEPPadding</span><br><span style="white-space: nowrap">PKCS1Padding</span></td>
<td><span style="white-space: nowrap">1+</span></td>
<td></td>
</tr>
<tr>
<td><span style="white-space: nowrap">OAEPwithSHA-1andMGF1Padding</span><br><span style="white-space: nowrap">OAEPwithSHA-256andMGF1Padding</span></td>
<td><span style="white-space: nowrap">10+</span></td>
<td></td>
</tr>
<tr>
<td><span style="white-space: nowrap">OAEPwithSHA-224andMGF1Padding</span><br><span style="white-space: nowrap">OAEPwithSHA-384andMGF1Padding</span><br><span style="white-space: nowrap">OAEPwithSHA-512andMGF1Padding</span></td>
<td><span style="white-space: nowrap">23+</span></td>
<td></td>
</tr>
</tbody>
</table>
These transformations are described in the
<see href="https://developer.android.com//../technotes/guides/security/StandardNames.html#Cipher">
Cipher section</see> of the
Java Cryptography Architecture Standard Algorithm Name Documentation.</para>
<para>Added in 1.4.</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
</Docs>
<Members>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="protected Cipher (IntPtr javaReference, Android.Runtime.JniHandleOwnership transfer);" />
<MemberSignature Language="ILAsm" Value=".method familyhidebysig specialname rtspecialname instance void .ctor(native int javaReference, valuetype Android.Runtime.JniHandleOwnership transfer) cil managed" />
<MemberSignature Language="DocId" Value="M:Javax.Crypto.Cipher.#ctor(System.IntPtr,Android.Runtime.JniHandleOwnership)" />
<MemberSignature Language="F#" Value="new Javax.Crypto.Cipher : nativeint * Android.Runtime.JniHandleOwnership -> Javax.Crypto.Cipher" Usage="new Javax.Crypto.Cipher (javaReference, transfer)" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>Mono.Android</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Parameters>
<Parameter Name="javaReference" Type="System.IntPtr" />
<Parameter Name="transfer" Type="Android.Runtime.JniHandleOwnership" />
</Parameters>
<Docs>
<param name="javaReference">A <see cref="T:System.IntPtr" />containing a Java Native Interface (JNI) object reference.</param>
<param name="transfer">A <see cref="T:Android.Runtime.JniHandleOwnership" />indicating how to handle <paramref name="javaReference" /></param>
<summary>A constructor used when creating managed representations of JNI objects; called by the runtime.</summary>
<remarks>
<para>Portions of this page are modifications based on work created and shared by the <format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format> and used according to terms described in the <format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
</Docs>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="protected Cipher (Javax.Crypto.CipherSpi? cipherSpi, Java.Security.Provider? provider, string? transformation);" />
<MemberSignature Language="ILAsm" Value=".method familyhidebysig specialname rtspecialname instance void .ctor(class Javax.Crypto.CipherSpi cipherSpi, class Java.Security.Provider provider, string transformation) cil managed" />
<MemberSignature Language="DocId" Value="M:Javax.Crypto.Cipher.#ctor(Javax.Crypto.CipherSpi,Java.Security.Provider,System.String)" />
<MemberSignature Language="F#" Value="new Javax.Crypto.Cipher : Javax.Crypto.CipherSpi * Java.Security.Provider * string -> Javax.Crypto.Cipher" Usage="new Javax.Crypto.Cipher (cipherSpi, provider, transformation)" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>Mono.Android</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[Android.Runtime.Register(".ctor", "(Ljavax/crypto/CipherSpi;Ljava/security/Provider;Ljava/lang/String;)V", "")]</AttributeName>
<AttributeName Language="F#">[<Android.Runtime.Register(".ctor", "(Ljavax/crypto/CipherSpi;Ljava/security/Provider;Ljava/lang/String;)V", "")>]</AttributeName>
</Attribute>
</Attributes>
<Parameters>
<Parameter Name="cipherSpi" Type="Javax.Crypto.CipherSpi" />
<Parameter Name="provider" Type="Java.Security.Provider" />
<Parameter Name="transformation" Type="System.String" />
</Parameters>
<Docs>
<param name="cipherSpi">the delegate</param>
<param name="provider">the provider</param>
<param name="transformation">the transformation</param>
<summary>Creates a Cipher object.</summary>
<remarks>
<para>Creates a Cipher object.</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#Cipher(javax.crypto.CipherSpi,%20java.security.Provider,%20java.lang.String)" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.Cipher(javax.crypto.CipherSpi, java.security.Provider, java.lang.String)</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
<exception cref="T:Java.Lang.NullPointerException">if either cipherSpi is <c>null</c> or provider is <c>null</c> and <c>cipherSpi</c> is a <c>NullCipherSpi</c>.
</exception>
</Docs>
</Member>
<Member MemberName="Algorithm">
<MemberSignature Language="C#" Value="public string? Algorithm { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance string Algorithm" />
<MemberSignature Language="DocId" Value="P:Javax.Crypto.Cipher.Algorithm" />
<MemberSignature Language="F#" Value="member this.Algorithm : string" Usage="Javax.Crypto.Cipher.Algorithm" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>Mono.Android</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[get: Android.Runtime.Register("getAlgorithm", "()Ljava/lang/String;", "")]</AttributeName>
<AttributeName Language="F#">[<get: Android.Runtime.Register("getAlgorithm", "()Ljava/lang/String;", "")>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.String</ReturnType>
</ReturnValue>
<Docs>
<summary>Returns the algorithm name of this <c>Cipher</c> object.</summary>
<value>the algorithm name of this <c>Cipher</c> object.</value>
<remarks>
<para>Returns the algorithm name of this <c>Cipher</c> object.</para>
<para>This is the same name that was specified in one of the
<c>getInstance</c> calls that created this <c>Cipher</c>
object..</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#getAlgorithm()" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.getAlgorithm()</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
</Docs>
</Member>
<Member MemberName="BlockSize">
<MemberSignature Language="C#" Value="public int BlockSize { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance int32 BlockSize" />
<MemberSignature Language="DocId" Value="P:Javax.Crypto.Cipher.BlockSize" />
<MemberSignature Language="F#" Value="member this.BlockSize : int" Usage="Javax.Crypto.Cipher.BlockSize" />
<MemberType>Property</MemberType>
<AssemblyInfo>
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<AssemblyVersion>0.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute>
<AttributeName Language="C#">[get: Android.Runtime.Register("getBlockSize", "()I", "")]</AttributeName>
<AttributeName Language="F#">[<get: Android.Runtime.Register("getBlockSize", "()I", "")>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Docs>
<summary>Returns the block size (in bytes).</summary>
<value>the block size (in bytes), or 0 if the underlying algorithm is
not a block cipher</value>
<remarks>
<para>Returns the block size (in bytes).</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#getBlockSize()" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.getBlockSize()</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
</Docs>
</Member>
<Member MemberName="DecryptMode">
<MemberSignature Language="C#" Value="public const Javax.Crypto.CipherMode DecryptMode = 2;" />
<MemberSignature Language="ILAsm" Value=".field public static literal valuetype Javax.Crypto.CipherMode DecryptMode = (2)" />
<MemberSignature Language="DocId" Value="F:Javax.Crypto.Cipher.DecryptMode" />
<MemberSignature Language="F#" Value="val mutable DecryptMode : Javax.Crypto.CipherMode" Usage="Javax.Crypto.Cipher.DecryptMode" />
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<Attributes>
<Attribute>
<AttributeName Language="C#">[Android.Runtime.Register("DECRYPT_MODE")]</AttributeName>
<AttributeName Language="F#">[<Android.Runtime.Register("DECRYPT_MODE")>]</AttributeName>
</Attribute>
<Attribute>
<AttributeName Language="C#">[System.Obsolete("This constant will be removed in the future version. Use Javax.Crypto.CipherMode enum directly instead of this field.", true)]</AttributeName>
<AttributeName Language="F#">[<System.Obsolete("This constant will be removed in the future version. Use Javax.Crypto.CipherMode enum directly instead of this field.", true)>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>Javax.Crypto.CipherMode</ReturnType>
</ReturnValue>
<MemberValue>2</MemberValue>
<Docs>
<summary>Constant used to initialize cipher to decryption mode.</summary>
<remarks>
<para>Constant used to initialize cipher to decryption mode.</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#DECRYPT_MODE" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.DECRYPT_MODE</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
</Docs>
</Member>
<Member MemberName="DoFinal">
<MemberSignature Language="C#" Value="public byte[]? DoFinal ();" />
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<MemberSignature Language="DocId" Value="M:Javax.Crypto.Cipher.DoFinal" />
<MemberSignature Language="F#" Value="member this.DoFinal : unit -> byte[]" Usage="cipher.DoFinal " />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>Mono.Android</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
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<Attributes>
<Attribute>
<AttributeName Language="C#">[Android.Runtime.Register("doFinal", "()[B", "")]</AttributeName>
<AttributeName Language="F#">[<Android.Runtime.Register("doFinal", "()[B", "")>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Byte[]</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Finishes a multiple-part encryption or decryption operation, depending
on how this cipher was initialized.</summary>
<returns>the new buffer with the result</returns>
<remarks>
<para>Finishes a multiple-part encryption or decryption operation, depending
on how this cipher was initialized.</para>
<para>Input data that may have been buffered during a previous
<c>update</c> operation is processed, with padding (if requested)
being applied.
If an AEAD mode such as GCM/CCM is being used, the authentication
tag is appended in the case of encryption, or verified in the
case of decryption.
The result is stored in a new buffer.</para>
<para>Upon finishing, this method resets this cipher object to the state
it was in when previously initialized via a call to <c>init</c>.
That is, the object is reset and available to encrypt or decrypt
(depending on the operation mode that was specified in the call to
<c>init</c>) more data.</para>
<para>Note: if any exception is thrown, this cipher object may need to
be reset before it can be used again.</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#doFinal()" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.doFinal()</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
<exception cref="T:Javax.Crypto.IllegalBlockSizeException">if the size of the resulting bytes is not a multiple of the
cipher block size.</exception>
<exception cref="T:Javax.Crypto.BadPaddingException">if the padding of the data does not match the padding scheme.</exception>
<exception cref="T:Java.Lang.IllegalStateException">if this cipher instance is not initialized for encryption or
decryption.
</exception>
</Docs>
</Member>
<Member MemberName="DoFinal">
<MemberSignature Language="C#" Value="public byte[]? DoFinal (byte[]? input);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig instance unsigned int8[] DoFinal(unsigned int8[] input) cil managed" />
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<MemberSignature Language="F#" Value="member this.DoFinal : byte[] -> byte[]" Usage="cipher.DoFinal input" />
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<AssemblyInfo>
<AssemblyName>Mono.Android</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
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<Attributes>
<Attribute>
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</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Byte[]</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="input" Type="System.Byte[]" />
</Parameters>
<Docs>
<param name="input">the input buffer</param>
<summary>Encrypts or decrypts data in a single-part operation, or finishes a
multiple-part operation.</summary>
<returns>the new buffer with the result</returns>
<remarks>
<para>Encrypts or decrypts data in a single-part operation, or finishes a
multiple-part operation. The data is encrypted or decrypted,
depending on how this cipher was initialized.</para>
<para>The bytes in the <c>input</c> buffer, and any input bytes that
may have been buffered during a previous <c>update</c> operation,
are processed, with padding (if requested) being applied.
If an AEAD mode such as GCM/CCM is being used, the authentication
tag is appended in the case of encryption, or verified in the
case of decryption.
The result is stored in a new buffer.</para>
<para>Upon finishing, this method resets this cipher object to the state
it was in when previously initialized via a call to <c>init</c>.
That is, the object is reset and available to encrypt or decrypt
(depending on the operation mode that was specified in the call to
<c>init</c>) more data.</para>
<para>Note: if any exception is thrown, this cipher object may need to
be reset before it can be used again.</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#doFinal(byte[])" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.doFinal(byte[])</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
<exception cref="T:Javax.Crypto.IllegalBlockSizeException">if the size of the resulting bytes is not a multiple of the
cipher block size.</exception>
<exception cref="T:Javax.Crypto.BadPaddingException">if the padding of the data does not match the padding scheme.</exception>
<exception cref="T:Java.Lang.IllegalStateException">if this cipher instance is not initialized for encryption or
decryption.
</exception>
</Docs>
</Member>
<Member MemberName="DoFinal">
<MemberSignature Language="C#" Value="public int DoFinal (Java.Nio.ByteBuffer? input, Java.Nio.ByteBuffer? output);" />
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<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="input" Type="Java.Nio.ByteBuffer" />
<Parameter Name="output" Type="Java.Nio.ByteBuffer" />
</Parameters>
<Docs>
<param name="input">the input ByteBuffer</param>
<param name="output">the output ByteBuffer</param>
<summary>Encrypts or decrypts data in a single-part operation, or finishes a
multiple-part operation.</summary>
<returns>the number of bytes stored in <c>output</c></returns>
<remarks>
<para>Encrypts or decrypts data in a single-part operation, or finishes a
multiple-part operation. The data is encrypted or decrypted,
depending on how this cipher was initialized.</para>
<para>All <c>input.remaining()</c> bytes starting at
<c>input.position()</c> are processed.
If an AEAD mode such as GCM/CCM is being used, the authentication
tag is appended in the case of encryption, or verified in the
case of decryption.
The result is stored in the output buffer.
Upon return, the input buffer's position will be equal
to its limit; its limit will not have changed. The output buffer's
position will have advanced by n, where n is the value returned
by this method; the output buffer's limit will not have changed.</para>
<para>If <c>output.remaining()</c> bytes are insufficient to
hold the result, a <c>ShortBufferException</c> is thrown.
In this case, repeat this call with a larger output buffer. Use
<c>#getOutputSize(int) getOutputSize</c> to determine how big
the output buffer should be.</para>
<para>Upon finishing, this method resets this cipher object to the state
it was in when previously initialized via a call to <c>init</c>.
That is, the object is reset and available to encrypt or decrypt
(depending on the operation mode that was specified in the call to
<c>init</c>) more data.</para>
<para>Note: if any exception is thrown, this cipher object may need to
be reset before it can be used again.</para>
<para>Note: this method should be copy-safe, which means the
<c>input</c> and <c>output</c> buffers can reference
the same byte array and no unprocessed input data is overwritten
when the result is copied into the output buffer.</para>
<para>Added in 1.5.</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#doFinal(java.nio.ByteBuffer,%20java.nio.ByteBuffer)" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.doFinal(java.nio.ByteBuffer, java.nio.ByteBuffer)</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
<exception cref="T:Javax.Crypto.ShortBufferException">if the size of the <c>output</c> buffer is too small.</exception>
<exception cref="T:Javax.Crypto.IllegalBlockSizeException">if the size of the resulting bytes is not a multiple of the
cipher block size.</exception>
<exception cref="T:Javax.Crypto.BadPaddingException">if the padding of the data does not match the padding scheme.</exception>
<exception cref="T:Java.Lang.IllegalArgumentException">if the input buffer and the output buffer are the same
object.</exception>
<exception cref="T:Java.Lang.IllegalStateException">if this cipher instance is not initialized for encryption or
decryption.
</exception>
</Docs>
</Member>
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<Attributes>
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<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="output" Type="System.Byte[]" />
<Parameter Name="outputOffset" Type="System.Int32" />
</Parameters>
<Docs>
<param name="output">the buffer for the result</param>
<param name="outputOffset">the offset in <c>output</c> where the result
is stored</param>
<summary>Finishes a multiple-part encryption or decryption operation, depending
on how this cipher was initialized.</summary>
<returns>the number of bytes stored in <c>output</c></returns>
<remarks>
<para>Finishes a multiple-part encryption or decryption operation, depending
on how this cipher was initialized.</para>
<para>Input data that may have been buffered during a previous
<c>update</c> operation is processed, with padding (if requested)
being applied.
If an AEAD mode such as GCM/CCM is being used, the authentication
tag is appended in the case of encryption, or verified in the
case of decryption.
The result is stored in the <c>output</c> buffer, starting at
<c>outputOffset</c> inclusive.</para>
<para>If the <c>output</c> buffer is too small to hold the result,
a <c>ShortBufferException</c> is thrown. In this case, repeat this
call with a larger output buffer. Use
<c>#getOutputSize(int) getOutputSize</c> to determine how big
the output buffer should be.</para>
<para>Upon finishing, this method resets this cipher object to the state
it was in when previously initialized via a call to <c>init</c>.
That is, the object is reset and available to encrypt or decrypt
(depending on the operation mode that was specified in the call to
<c>init</c>) more data.</para>
<para>Note: if any exception is thrown, this cipher object may need to
be reset before it can be used again.</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#doFinal(byte[],%20int)" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.doFinal(byte[], int)</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
<exception cref="T:Javax.Crypto.IllegalBlockSizeException">if the size of the resulting bytes is not a multiple of the
cipher block size.</exception>
<exception cref="T:Javax.Crypto.ShortBufferException">if the size of the <c>output</c> buffer is too small.</exception>
<exception cref="T:Javax.Crypto.BadPaddingException">if the padding of the data does not match the padding scheme.</exception>
<exception cref="T:Java.Lang.IllegalStateException">if this cipher instance is not initialized for encryption or
decryption.
</exception>
</Docs>
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<ReturnValue>
<ReturnType>System.Byte[]</ReturnType>
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<Parameters>
<Parameter Name="input" Type="System.Byte[]" />
<Parameter Name="inputOffset" Type="System.Int32" />
<Parameter Name="inputLen" Type="System.Int32" />
</Parameters>
<Docs>
<param name="input">the input buffer</param>
<param name="inputOffset">the offset in <c>input</c> where the input
starts</param>
<param name="inputLen">the input length</param>
<summary>Encrypts or decrypts data in a single-part operation, or finishes a
multiple-part operation.</summary>
<returns>the new buffer with the result</returns>
<remarks>
<para>Encrypts or decrypts data in a single-part operation, or finishes a
multiple-part operation. The data is encrypted or decrypted,
depending on how this cipher was initialized.</para>
<para>The first <c>inputLen</c> bytes in the <c>input</c>
buffer, starting at <c>inputOffset</c> inclusive, and any input
bytes that may have been buffered during a previous <c>update</c>
operation, are processed, with padding (if requested) being applied.
If an AEAD mode such as GCM/CCM is being used, the authentication
tag is appended in the case of encryption, or verified in the
case of decryption.
The result is stored in a new buffer.</para>
<para>Upon finishing, this method resets this cipher object to the state
it was in when previously initialized via a call to <c>init</c>.
That is, the object is reset and available to encrypt or decrypt
(depending on the operation mode that was specified in the call to
<c>init</c>) more data.</para>
<para>Note: if any exception is thrown, this cipher object may need to
be reset before it can be used again.</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#doFinal(byte[],%20int,%20int)" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.doFinal(byte[], int, int)</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
<exception cref="T:Javax.Crypto.IllegalBlockSizeException">if the size of the resulting bytes is not a multiple of the
cipher block size.</exception>
<exception cref="T:Javax.Crypto.BadPaddingException">if the padding of the data does not match the padding scheme.</exception>
<exception cref="T:Java.Lang.IllegalStateException">if this cipher instance is not initialized for encryption or
decryption.</exception>
<exception cref="T:Java.Lang.IllegalArgumentException">if <c>inputOffset</c> and <c>inputLen</c> do not specify an
valid chunk in the input buffer.
</exception>
</Docs>
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<Member MemberName="DoFinal">
<MemberSignature Language="C#" Value="public int DoFinal (byte[]? input, int inputOffset, int inputLen, byte[]? output);" />
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<Attributes>
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<ReturnValue>
<ReturnType>System.Int32</ReturnType>
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<Parameters>
<Parameter Name="input" Type="System.Byte[]" />
<Parameter Name="inputOffset" Type="System.Int32" />
<Parameter Name="inputLen" Type="System.Int32" />
<Parameter Name="output" Type="System.Byte[]" />
</Parameters>
<Docs>
<param name="input">the input buffer</param>
<param name="inputOffset">the offset in <c>input</c> where the input
starts</param>
<param name="inputLen">the input length</param>
<param name="output">the buffer for the result</param>
<summary>Encrypts or decrypts data in a single-part operation, or finishes a
multiple-part operation.</summary>
<returns>the number of bytes stored in <c>output</c></returns>
<remarks>
<para>Encrypts or decrypts data in a single-part operation, or finishes a
multiple-part operation. The data is encrypted or decrypted,
depending on how this cipher was initialized.</para>
<para>The first <c>inputLen</c> bytes in the <c>input</c>
buffer, starting at <c>inputOffset</c> inclusive, and any input
bytes that may have been buffered during a previous <c>update</c>
operation, are processed, with padding (if requested) being applied.
If an AEAD mode such as GCM/CCM is being used, the authentication
tag is appended in the case of encryption, or verified in the
case of decryption.
The result is stored in the <c>output</c> buffer.</para>
<para>If the <c>output</c> buffer is too small to hold the result,
a <c>ShortBufferException</c> is thrown. In this case, repeat this
call with a larger output buffer. Use
<c>#getOutputSize(int) getOutputSize</c> to determine how big
the output buffer should be.</para>
<para>Upon finishing, this method resets this cipher object to the state
it was in when previously initialized via a call to <c>init</c>.
That is, the object is reset and available to encrypt or decrypt
(depending on the operation mode that was specified in the call to
<c>init</c>) more data.</para>
<para>Note: if any exception is thrown, this cipher object may need to
be reset before it can be used again.</para>
<para>Note: this method should be copy-safe, which means the
<c>input</c> and <c>output</c> buffers can reference
the same byte array and no unprocessed input data is overwritten
when the result is copied into the output buffer.</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#doFinal(byte[],%20int,%20int,%20byte[])" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.doFinal(byte[], int, int, byte[])</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
<exception cref="T:Javax.Crypto.ShortBufferException">if the size of the <c>output</c> buffer is too small.</exception>
<exception cref="T:Javax.Crypto.IllegalBlockSizeException">if the size of the resulting bytes is not a multiple of the
cipher block size.</exception>
<exception cref="T:Javax.Crypto.BadPaddingException">if the padding of the data does not match the padding scheme.</exception>
<exception cref="T:Java.Lang.IllegalStateException">if this cipher instance is not initialized for encryption or
decryption.</exception>
<exception cref="T:Java.Lang.IllegalArgumentException">if <c>inputOffset</c> and <c>inputLen</c> do not specify an
valid chunk in the input buffer.
</exception>
</Docs>
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<MemberSignature Language="C#" Value="public int DoFinal (byte[]? input, int inputOffset, int inputLen, byte[]? output, int outputOffset);" />
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<AssemblyName>Mono.Android</AssemblyName>
<AssemblyVersion>0.0.0.0</AssemblyVersion>
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<Attributes>
<Attribute>
<AttributeName Language="C#">[Android.Runtime.Register("doFinal", "([BII[BI)I", "")]</AttributeName>
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</Attributes>
<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="input" Type="System.Byte[]" />
<Parameter Name="inputOffset" Type="System.Int32" />
<Parameter Name="inputLen" Type="System.Int32" />
<Parameter Name="output" Type="System.Byte[]" />
<Parameter Name="outputOffset" Type="System.Int32" />
</Parameters>
<Docs>
<param name="input">the input buffer</param>
<param name="inputOffset">the offset in <c>input</c> where the input
starts</param>
<param name="inputLen">the input length</param>
<param name="output">the buffer for the result</param>
<param name="outputOffset">the offset in <c>output</c> where the result
is stored</param>
<summary>Encrypts or decrypts data in a single-part operation, or finishes a
multiple-part operation.</summary>
<returns>the number of bytes stored in <c>output</c></returns>
<remarks>
<para>Encrypts or decrypts data in a single-part operation, or finishes a
multiple-part operation. The data is encrypted or decrypted,
depending on how this cipher was initialized.</para>
<para>The first <c>inputLen</c> bytes in the <c>input</c>
buffer, starting at <c>inputOffset</c> inclusive, and any input
bytes that may have been buffered during a previous
<c>update</c> operation, are processed, with padding
(if requested) being applied.
If an AEAD mode such as GCM/CCM is being used, the authentication
tag is appended in the case of encryption, or verified in the
case of decryption.
The result is stored in the <c>output</c> buffer, starting at
<c>outputOffset</c> inclusive.</para>
<para>If the <c>output</c> buffer is too small to hold the result,
a <c>ShortBufferException</c> is thrown. In this case, repeat this
call with a larger output buffer. Use
<c>#getOutputSize(int) getOutputSize</c> to determine how big
the output buffer should be.</para>
<para>Upon finishing, this method resets this cipher object to the state
it was in when previously initialized via a call to <c>init</c>.
That is, the object is reset and available to encrypt or decrypt
(depending on the operation mode that was specified in the call to
<c>init</c>) more data.</para>
<para>Note: if any exception is thrown, this cipher object may need to
be reset before it can be used again.</para>
<para>Note: this method should be copy-safe, which means the
<c>input</c> and <c>output</c> buffers can reference
the same byte array and no unprocessed input data is overwritten
when the result is copied into the output buffer.</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#doFinal(byte[],%20int,%20int,%20byte[],%20int)" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.doFinal(byte[], int, int, byte[], int)</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
<exception cref="T:Javax.Crypto.ShortBufferException">if the size of the <c>output</c> buffer is too small.</exception>
<exception cref="T:Javax.Crypto.IllegalBlockSizeException">if the size of the resulting bytes is not a multiple of the
cipher block size.</exception>
<exception cref="T:Javax.Crypto.BadPaddingException">if the padding of the data does not match the padding scheme.</exception>
<exception cref="T:Java.Lang.IllegalStateException">if this cipher instance is not initialized for encryption or
decryption.</exception>
<exception cref="T:Java.Lang.IllegalArgumentException">if <c>inputOffset</c> and <c>inputLen</c> do not specify an
valid chunk in the input buffer.
</exception>
</Docs>
</Member>
<Member MemberName="EncryptMode">
<MemberSignature Language="C#" Value="public const Javax.Crypto.CipherMode EncryptMode = 1;" />
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<ReturnType>Javax.Crypto.CipherMode</ReturnType>
</ReturnValue>
<MemberValue>1</MemberValue>
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<summary>Constant used to initialize cipher to encryption mode.</summary>
<remarks>
<para>Constant used to initialize cipher to encryption mode.</para>
<para>
<format type="text/html">
<a href="https://developer.android.com/reference/javax/crypto/Cipher#ENCRYPT_MODE" title="Reference documentation">Java documentation for <code>javax.crypto.Cipher.ENCRYPT_MODE</code>.</a>
</format>
</para>
<para>
Portions of this page are modifications based on work created and shared by the
<format type="text/html"><a href="https://developers.google.com/terms/site-policies" title="Android Open Source Project">Android Open Source Project</a></format>
and used according to terms described in the
<format type="text/html"><a href="https://creativecommons.org/licenses/by/2.5/" title="Creative Commons 2.5 Attribution License">Creative Commons 2.5 Attribution License.</a></format></para>
</remarks>
<since version="Added in API level 1" />
</Docs>
</Member>
<Member MemberName="ExemptionMechanism">
<MemberSignature Language="C#" Value="public Javax.Crypto.ExemptionMechanism? ExemptionMechanism { get; }" />
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