Problem - Kevin Tafuro

work, which severely limits portability across various Windows versions. (The .NET
framework is available only for Windows XP and Windows .NET Server 2003.)
Brian Gladman’s AES implementation
Brian Gladman has written the fastest freely available AES implementation to date.
He has a version in x86 assembly that works with Windows and a portable C version
that is faster than the assembly versions other people offer. It’s available from
his web page at http://fp.gladman.plus.com/AES/.
To bind his implementation to our macros, do the following:
#include "aes.h"
#define SPC_BLOCK_SZ 16
typedef aes_ctx SPC_KEY_SCHED;
#define SPC_ENCRYPT_INIT(sched, key, keybytes) aes_enc_key(key, keybytes, sched)
#define SPC_DECRYPT_INIT(sched, key, keybytes) aes_dec_key(key, keybytes, sched)
#define SPC_DO_ENCRYPT(sched, in, out) aes_enc_block(in, out, sched)
#define SPC_DO_DECRYPT(sched, in, out) aes_dec_block(in, out, sched)
OpenSSL block cipher implementations
Next, we’ll provide implementations for these macros for all of the ciphers in
OpenSSL0.9.7. Note that the block size for all of the algorithms listed in this section
is 8 bytes, except for AES, which is 16.
Table 5-2 lists the block ciphers that OpenSSLexports, along with the header file
you need to include for each cipher and the associated type for the key schedule.
Table 5-2. Block ciphers supported by OpenSSL
Cipher Header file Key schedule type
AES openssl/aes.h AES_KEY
Blowfish openssl/blowfish.h BF_KEY
CAST5 openssl/cast.h CAST_KEY
DES openssl/des.h DES_key_schedule
3-key Triple-DES openssl/des.h DES_EDE_KEY
2-key Triple-DES openssl/des.h DES_EDE_KEY
IDEA openssl/idea.h IDEA_KEY_SCHEDULE
RC2 openssl/rc2.h RC2_KEY
RC5 openssl/rc5.h RC5_32_KEY
Table 5-3 provides implementations of the SPC_ENCRYPT_INIT macro for each of the
block ciphers listed in Table 5-2.
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