diff options
Diffstat (limited to 'core/src/main/java/org/bouncycastle/crypto/StreamCipher.java')
-rw-r--r-- | core/src/main/java/org/bouncycastle/crypto/StreamCipher.java | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/StreamCipher.java b/core/src/main/java/org/bouncycastle/crypto/StreamCipher.java new file mode 100644 index 00000000..2a55d4f6 --- /dev/null +++ b/core/src/main/java/org/bouncycastle/crypto/StreamCipher.java @@ -0,0 +1,53 @@ +package org.bouncycastle.crypto; + +/** + * the interface stream ciphers conform to. + */ +public interface StreamCipher +{ + /** + * Initialise the cipher. + * + * @param forEncryption if true the cipher is initialised for + * encryption, if false for decryption. + * @param params the key and other data required by the cipher. + * @exception IllegalArgumentException if the params argument is + * inappropriate. + */ + public void init(boolean forEncryption, CipherParameters params) + throws IllegalArgumentException; + + /** + * Return the name of the algorithm the cipher implements. + * + * @return the name of the algorithm the cipher implements. + */ + public String getAlgorithmName(); + + /** + * encrypt/decrypt a single byte returning the result. + * + * @param in the byte to be processed. + * @return the result of processing the input byte. + */ + public byte returnByte(byte in); + + /** + * process a block of bytes from in putting the result into out. + * + * @param in the input byte array. + * @param inOff the offset into the in array where the data to be processed starts. + * @param len the number of bytes to be processed. + * @param out the output buffer the processed bytes go into. + * @param outOff the offset into the output byte array the processed data starts at. + * @exception DataLengthException if the output buffer is too small. + */ + public void processBytes(byte[] in, int inOff, int len, byte[] out, int outOff) + throws DataLengthException; + + /** + * reset the cipher. This leaves it in the same state + * it was at after the last init (if there was one). + */ + public void reset(); +} |