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## org.mozilla.jss.pkcs7
Class ContentInfo

    java.lang.Object
      |
      +--org.mozilla.jss.pkcs7.ContentInfo

All Implemented Interfaces:
  ASN1Value

public class ContentInfo
extends java.lang.Object
implements ASN1Value

A PKCS #7 ContentInfo structure.

Nested Class Summary
`static class` | `ContentInfo.Template` A template for decoding a ContentInfo blob

Field Summary
`private ANY` | `content`
`private OBJECT_IDENTIFIER` | `contentType`
`static OBJECT_IDENTIFIER` | `DATA`
`static OBJECT_IDENTIFIER` | `DIGESTED_DATA`
`static OBJECT_IDENTIFIER` | `ENCRYPTED_DATA`
`static OBJECT_IDENTIFIER` | `ENVELOPED_DATA`
`private SEQUENCE` | `sequence`
`static OBJECT_IDENTIFIER` | `SIGNED_AND_ENVELOPED_DATA`
`static OBJECT_IDENTIFIER` | `SIGNED_DATA`
`static Tag` | `TAG`
`private static ContentInfo.Template` | `templateInstance`

Constructor Summary
`private` | `ContentInfo()`
`` | `ContentInfo(byte[] data)` Creates a ContentInfo of type `data`.
`` | `ContentInfo(DigestedData dd)` Creates a ContentInfo of type `digestedData`.
`` | `ContentInfo(EncryptedData ed)` Creates a ContentInfo of type `encryptedData`.
`` | `ContentInfo(EnvelopedData ed)` Creates a ContentInfo of type `envelopedData`.
`` | `ContentInfo(OBJECT_IDENTIFIER contentType, ASN1Value content)` Creates a ContentInfo with the given type and content.
`` | `ContentInfo(SignedAndEnvelopedData sed)` Creates a ContentInfo of type `signedAndEnvelopedData`.
`` | `ContentInfo(SignedData sd)` Creates a ContentInfo of type `signedData`.

Method Summary
`void` | `encode(java.io.OutputStream ostream)` Write this value's DER encoding to an output stream using its own base tag.
`void` | `encode(Tag implicitTag, java.io.OutputStream ostream)` Write this value's DER encoding to an output stream using an implicit tag.
`ANY` | `getContent()` Returns the content encoded as an ANY.
`OBJECT_IDENTIFIER` | `getContentType()` Returns the contentType field, which determines what kind of content is contained in this ContentInfo.
`ASN1Value` | `getInterpretedContent()` Returns the content, interpreted based on its type.
`Tag` | `getTag()` Returns the base tag for this type, not counting any tags that may be imposed on it by its context.
`static ContentInfo.Template` | `getTemplate()` Returns a singleton instance of a decoding template for ContentInfo.
`boolean` | `hasContent()` Returns `true` if the content field is present.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### TAG

    public static final Tag TAG

### DATA

    public static OBJECT_IDENTIFIER DATA

### SIGNED_DATA

    public static OBJECT_IDENTIFIER SIGNED_DATA

### ENVELOPED_DATA

    public static OBJECT_IDENTIFIER ENVELOPED_DATA

### SIGNED_AND_ENVELOPED_DATA

    public static OBJECT_IDENTIFIER SIGNED_AND_ENVELOPED_DATA

### DIGESTED_DATA

    public static OBJECT_IDENTIFIER DIGESTED_DATA

### ENCRYPTED_DATA

    public static OBJECT_IDENTIFIER ENCRYPTED_DATA

### contentType

    private OBJECT_IDENTIFIER contentType

### content

    private ANY content

### sequence

    private SEQUENCE sequence

### templateInstance

    private static ContentInfo.Template templateInstance

Constructor Detail

### ContentInfo

    private ContentInfo()

### ContentInfo

    public ContentInfo(OBJECT_IDENTIFIER contentType,
                       ASN1Value content)

  Creates a ContentInfo with the given type and content.

Parameters:
  `contentType` - The contentType of the ContentInfo.
  `content` - The content of the ContentInfo. May be `null` to signify that the optional content field is not present.

### ContentInfo

    public ContentInfo(byte[] data)

  Creates a ContentInfo of type `data`.

### ContentInfo

    public ContentInfo(SignedData sd)

  Creates a ContentInfo of type `signedData`.

### ContentInfo

    public ContentInfo(EnvelopedData ed)

  Creates a ContentInfo of type `envelopedData`.

### ContentInfo

    public ContentInfo(SignedAndEnvelopedData sed)

  Creates a ContentInfo of type `signedAndEnvelopedData`.

### ContentInfo

    public ContentInfo(DigestedData dd)

  Creates a ContentInfo of type `digestedData`.

### ContentInfo

    public ContentInfo(EncryptedData ed)

  Creates a ContentInfo of type `encryptedData`.

Method Detail

### getContentType

    public OBJECT_IDENTIFIER getContentType()

  Returns the contentType field, which determines what kind of content is contained in this ContentInfo. It will usually be one of the six predefined types, but may also be a user-defined type.

### hasContent

    public boolean hasContent()

  Returns `true` if the content field is present.

### getInterpretedContent

    public ASN1Value getInterpretedContent()
                                    throws InvalidBERException

  Returns the content, interpreted based on its type. If there is no content, `null` is returned.

  If the contentType is one of the six standard types, the returned object will be of that type. For example, if the ContentInfo has contentType signedData, a SignedData object will be returned. If the contentType is data, an OCTET_STRING will be returned.

  If the contentType is not one of the six standard types, the returned object will be an ANY.

    `InvalidBERException`

### getContent

    public ANY getContent()

  Returns the content encoded as an ANY. If there is no content, `null` is returned.

### encode

    public void encode(java.io.OutputStream ostream)
                throws java.io.IOException

  Description copied from interface: `ASN1Value`
  Write this value's DER encoding to an output stream using its own base tag.

  Specified by:
    `encode` in interface `ASN1Value`
    `java.io.IOException`

### encode

    public void encode(Tag implicitTag,
                       java.io.OutputStream ostream)
                throws java.io.IOException

  Description copied from interface: `ASN1Value`
  Write this value's DER encoding to an output stream using an implicit tag.

  Specified by:
    `encode` in interface `ASN1Value`
    `java.io.IOException`

### getTag

    public Tag getTag()

  Description copied from interface: `ASN1Value`
  Returns the base tag for this type, not counting any tags that may be imposed on it by its context.

  Specified by:
    `getTag` in interface `ASN1Value`

### getTemplate

    public static ContentInfo.Template getTemplate()

  Returns a singleton instance of a decoding template for ContentInfo.

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