Package org.bouncycastle.asn1

Class ASN1InputStream

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable, BERTags
    public class ASN1InputStream
extends java.io.FilterInputStream
implements BERTags
    A general purpose ASN.1 decoder - note: this class differs from the others in that it returns null after it has read the last object in the stream. If an ASN.1 NULL is encountered a DER/BER Null object is returned.

    • Constructor Detail

      • ASN1InputStream

        public ASN1InputStream​(java.io.InputStream is)

      • ASN1InputStream

        public ASN1InputStream​(byte[] input)
        Create an ASN1InputStream based on the input byte array. The length of DER objects in the stream is automatically limited to the length of the input array.
        Parameters:
        input - array containing ASN.1 encoded data.

      • ASN1InputStream

        public ASN1InputStream​(byte[] input,
                       boolean lazyEvaluate)
        Create an ASN1InputStream based on the input byte array. The length of DER objects in the stream is automatically limited to the length of the input array.
        Parameters:
        input - array containing ASN.1 encoded data.
        lazyEvaluate - true if parsing inside constructed objects can be delayed.

      • ASN1InputStream

        public ASN1InputStream​(java.io.InputStream input,
                       int limit)
        Create an ASN1InputStream where no DER object will be longer than limit.
        Parameters:
        input - stream containing ASN.1 encoded data.
        limit - maximum size of a DER encoded object.

      • ASN1InputStream

        public ASN1InputStream​(java.io.InputStream input,
                       boolean lazyEvaluate)
        Create an ASN1InputStream where no DER object will be longer than limit, and constructed objects such as sequences will be parsed lazily.
        Parameters:
        input - stream containing ASN.1 encoded data.
        lazyEvaluate - true if parsing inside constructed objects can be delayed.

      • ASN1InputStream

        public ASN1InputStream​(java.io.InputStream input,
                       int limit,
                       boolean lazyEvaluate)
        Create an ASN1InputStream where no DER object will be longer than limit, and constructed objects such as sequences will be parsed lazily.
        Parameters:
        input - stream containing ASN.1 encoded data.
        limit - maximum size of a DER encoded object.
        lazyEvaluate - true if parsing inside constructed objects can be delayed.

    • Method Detail

      • readLength

        protected int readLength()
                  throws java.io.IOException
        Throws:
        java.io.IOException

      • readFully

        protected void readFully​(byte[] bytes)
                  throws java.io.IOException
        Throws:
        java.io.IOException

      • buildObject

        protected ASN1Primitive buildObject​(int tag,
                                    int tagNo,
                                    int length)
                             throws java.io.IOException
        build an object given its tag and the number of bytes to construct it from.
        Parameters:
        tag - the full tag details.
        tagNo - the tagNo defined.
        length - the length of the object.
        Returns:
        the resulting primitive.
        Throws:
        java.io.IOException - on processing exception.

      • readObject

        public ASN1Primitive readObject()
                         throws java.io.IOException
        Throws:
        java.io.IOException