.TH BLOWFISH 3
.SH NAME
setupBFstate, bfCBCencrypt, bfCBCdecrypt, bfECBencrypt, bfECBdecrypt  - blowfish encryption
.SH SYNOPSIS
.B #include <u.h>
.br
.B #include <libc.h>
.br
.B #include <mp.h>
.br
.B #include <libsec.h>
.PP
.B
void setupBFstate(BFstate *s, uchar key[], int keybytes, 
.B
			 uchar *ivec)
.PP
.B
void bfCBCencrypt(uchar *data, int len, BFstate *s)
.PP
.B
void bfCBCdecrypt(uchar *data, int len, BFstate *s)
.PP
.B
void bfECBencrypt(uchar *data, int len, BFstate *s)
.PP
.B
void bfECBdecrypt(uchar *data, int len, BFstate *s)
.SH DESCRIPTION
.PP
Blowfish is Bruce Schneier's symmetric block cipher.  It supports
variable length keys from 32 to 448 bits and has a block size of 64
bits.  Both CBC and ECB modes are supported.
.PP
setupBFstate takes a BFstate structure, a key of at most 56 bytes, the
length of the key in bytes, and an initialization vector of 8 bytes
(set to all zeroes if argument is nil).  The encryption and decryption
functions take a BFstate structure, a data buffer, and a length, which
must be a multiple of eight bytes as padding is currently unsupported.
.SH SOURCE
.B \*9/src/libsec
.SH SEE ALSO
.IM mp (3) ,
.IM aes (3) ,
.IM des (3) ,
.IM dsa (3) ,
.IM elgamal (3) ,
.IM rc4 (3) ,
.IM rsa (3) ,
.IM sechash (3) ,
.IM prime (3) ,
.IM rand (3)