debian man page for shishi_encrypt_iv

shishi_encrypt_iv(3)						      shishi						      shishi_encrypt_iv(3)

NAME
       shishi_encrypt_iv - API function

SYNOPSIS
       #include <shishi.h>

       int  shishi_encrypt_iv(Shishi  * handle, Shishi_key * key, int keyusage, const char * iv, size_t ivlen, const char * in, size_t inlen, char
       ** out, size_t * outlen);

ARGUMENTS
       Shishi * handle
		   shishi handle as allocated by shishi_init().

       Shishi_key * key
		   key to encrypt with.

       int keyusage
		   integer specifying what this key is encrypting.

       const char * iv
		   input array with initialization vector

       size_t ivlen
		   size of input array with initialization vector.

       const char * in
		   input array with data to encrypt.

       size_t inlen
		   size of input array with data to encrypt.

       char ** out output array with newly allocated encrypted data.

       size_t * outlen
		   output variable with size of newly allocated output array.

DESCRIPTION
       Encrypts data using specified initialization vector and key.  The key actually used is derived using the key usage.  If key usage is 0,	no
       key  derivation	is  used.  The OUT buffer must be deallocated by the caller.  The next IV is lost, see shishi_encrypt_ivupdate if you need
       it.

       Note that DECRYPT(ENCRYPT(data)) does not necessarily yield data exactly.  Some encryption types add pad to make  the  data  fit  into  the
       block  size  of the encryption algorithm.  Furthermore, the pad is not guaranteed to look in any special way, although existing implementa-
       tions often pad with the zero byte.  This means that you may have to "frame" data, so it is possible to infer  the  original  length  after
       decryption.  Compare ASN.1 DER which contains such information.

RETURN VALUE
       Returns SHISHI_OK iff successful.

REPORTING BUGS
       Report bugs to <bug-shishi@gnu.org>.

COPYRIGHT
       Copyright (C) 2002-2010 Simon Josefsson.
       Copying	and  distribution  of  this file, with or without modification, are permitted in any medium without royalty provided the copyright
       notice and this notice are preserved.

SEE ALSO
       The full documentation for shishi is maintained as a Texinfo manual.  If the info and shishi programs are properly installed at your  site,
       the command

	      info shishi

       should give you access to the complete manual.

shishi								       1.0.1						      shishi_encrypt_iv(3)