RC4 man page on BSDOS

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rc4(3)			     OpenSSL			   rc4(3)

NAME
       RC4_set_key, RC4 - RC4 encryption

SYNOPSIS
	#include <openssl/rc4.h>

	void RC4_set_key(RC4_KEY *key, int len, const unsigned char *data);

	void RC4(RC4_KEY *key, unsigned long len, const unsigned char *indata,
		 unsigned char *outdata);

DESCRIPTION
       This library implements the Alleged RC4 cipher, which is
       described for example in Applied Cryptography.  It is
       believed to be compatible with RC4[TM], a proprietary
       cipher of RSA Security Inc.

       RC4 is a stream cipher with variable key length.
       Typically, 128 bit (16 byte) keys are used for strong
       encryption, but shorter insecure key sizes have been
       widely used due to export restrictions.

       RC4 consists of a key setup phase and the actual
       encryption or decryption phase.

       RC4_set_key() sets up the RC4_KEY key using the len bytes
       long key at data.

       RC4() encrypts or decrypts the len bytes of data at indata
       using key and places the result at outdata.  Repeated
       RC4() calls with the same key yield a continuous key
       stream.

       Since RC4 is a stream cipher (the input is XORed with a
       pseudo-random key stream to produce the output),
       decryption uses the same function calls as encryption.

       Applications should use the higher level functions
       EVP_EncryptInit(3) etc. instead of calling the RC4
       functions directly.

RETURN VALUES
       RC4_set_key() and RC4() do not return values.

NOTE
       Certain conditions have to be observed to securely use
       stream ciphers.	It is not permissible to perform multiple
       encryptions using the same key stream.

SEE ALSO
       blowfish(3), des(3), rc2(3)

16/Aug/2000		      0.9.6				1

rc4(3)			     OpenSSL			   rc4(3)

HISTORY
       RC4_set_key() and RC4() are available in all versions of
       SSLeay and OpenSSL.

16/Aug/2000		      0.9.6				2

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