de.profhenry.sshsig.core

Class SshBuffer

java.lang.Object

de.profhenry.sshsig.core.SshBuffer

public final class SshBuffer
extends Object

Buffer for encoding blobs according to the SSH protocol spec.

Supported data types

• integer values
• byte arrays (also sub ranges/slices)
• strings
• BigIntegers
• preambles
• sequence of a string and a byte array

Author:

profhenry

Constructor Summary

Constructors

Constructor and Description
SshBuffer()

Method Summary

Modifier and Type	Method and Description
void	appendBigInteger(BigInteger aBigInteger) Appends an BigInteger.
void	appendByteArray(byte[] aByteArray) Appends a byte array.
void	appendByteArray(byte[] aByteArray, int anOffset, int aLength) Appends a part/slice of a byte array.
void	appendInt(int anInteger) Appends an integer value.
void	appendPreamble(String aPreamble) Appends a preamble.
void	appendString(String aString) Appends a string.
void	appendStringAndByteArray(String aString, byte[] aByteArray) Appends a sequence of a string and a byte array.
byte[]	toByteArray()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SshBuffer

public SshBuffer()

Method Detail

appendPreamble

public void appendPreamble(String aPreamble)

Appends a preamble.

Just writes the byte representation of the preamble (ASCII encoded).

Added bytes: number of chars

Parameters:

aPreamble - the preamble

appendString

public void appendString(String aString)

Appends a string.

First writes an integer with the length of the string followed by the byte representation of the string (ASCII encoded).

Added bytes: 4 + number of chars

Parameters:

aString - the string

appendByteArray

public void appendByteArray(byte[] aByteArray)

Appends a byte array.

First writes an integer with the length of the byte array followed by the complete content of the byte array.

Added bytes: 4 + length of the byte array

Parameters:

aByteArray - the byte array

appendByteArray

public void appendByteArray(byte[] aByteArray,
                            int anOffset,
                            int aLength)

Appends a part/slice of a byte array.

First writes an integer with the requested length followed by the requested bytes of the byte array.

Added bytes: 4 + specified length

Parameters:

aByteArray - the byte array

anOffset - the offset

aLength - the length

appendInt

public void appendInt(int anInteger)

Appends an integer value.

Integer values are encoded big endian.

Added bytes: 4

Parameters:

anInteger - the integer value

appendBigInteger

public void appendBigInteger(BigInteger aBigInteger)

Appends an BigInteger.

Writes the two's-complement representation (big endian encoded).

Added bytes: the minimal number of bytes required to represent this big integer

Parameters:

aBigInteger - the big integer

appendStringAndByteArray

public void appendStringAndByteArray(String aString,
                                     byte[] aByteArray)

Appends a sequence of a string and a byte array.

First writes the overall bytes required by this sequence followed by the string and the byte array (each with their length fields as well).

Added bytes: 4 + 4 + number of chars + 4 + length of the byte array

Parameters:

aString - the string

aByteArray - the byte array

toByteArray

public byte[] toByteArray()