shishi_crypto(3) [debian man page]
shishi_crypto(3) shishi shishi_crypto(3) NAME
shishi_crypto - API function SYNOPSIS
#include <shishi.h> Shishi_crypto * shishi_crypto(Shishi * handle, Shishi_key * key, int keyusage, int32_t etype, const char * iv, size_t ivlen); ARGUMENTS
Shishi * handle shishi handle as allocated by shishi_init(). Shishi_key * key key to encrypt with. int keyusage integer specifying what this key will encrypt/decrypt. int32_t etype integer specifying what cipher to use. const char * iv input array with initialization vector size_t ivlen size of input array with initialization vector. DESCRIPTION
Initialize a crypto context. This store a key, keyusage, encryption type and initialization vector in a "context", and the caller can then use this context to perform encryption via shishi_crypto_encrypt() and decryption via shishi_crypto_encrypt() without supplying all those details again. The functions also takes care of propagating the IV between calls. When the application no longer need to use the context, it should deallocate resources associated with it by calling shishi_crypto_close(). RETURN VALUE
Return a newly allocated crypto context. 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_crypto(3)
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shishi_encrypt_iv_etype(3) shishi shishi_encrypt_iv_etype(3) NAME
shishi_encrypt_iv_etype - API function SYNOPSIS
#include <shishi.h> int shishi_encrypt_iv_etype(Shishi * handle, Shishi_key * key, int keyusage, int32_t etype, 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. int32_t etype integer specifying what cipher to use. 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 as per encryption method 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_etype 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_etype(3)