2 * Copyright (c) 2003 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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7 * modification, are permitted provided that the following conditions
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11 * notice, this list of conditions and the following disclaimer.
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14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
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18 * may be used to endorse or promote products derived from this software
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41 #include <krb5-types.h>
46 #include "rijndael-alg-fst.h"
50 AES_set_encrypt_key(const unsigned char *userkey
, const int bits
, AES_KEY
*key
)
52 key
->rounds
= rijndaelKeySetupEnc(key
->key
, userkey
, bits
);
59 AES_set_decrypt_key(const unsigned char *userkey
, const int bits
, AES_KEY
*key
)
61 key
->rounds
= rijndaelKeySetupDec(key
->key
, userkey
, bits
);
68 AES_encrypt(const unsigned char *in
, unsigned char *out
, const AES_KEY
*key
)
70 rijndaelEncrypt(key
->key
, key
->rounds
, in
, out
);
74 AES_decrypt(const unsigned char *in
, unsigned char *out
, const AES_KEY
*key
)
76 rijndaelDecrypt(key
->key
, key
->rounds
, in
, out
);
80 AES_cbc_encrypt(const unsigned char *in
, unsigned char *out
,
81 unsigned long size
, const AES_KEY
*key
,
82 unsigned char *iv
, int forward_encrypt
)
84 unsigned char tmp
[AES_BLOCK_SIZE
];
87 if (forward_encrypt
) {
88 while (size
>= AES_BLOCK_SIZE
) {
89 for (i
= 0; i
< AES_BLOCK_SIZE
; i
++)
90 tmp
[i
] = in
[i
] ^ iv
[i
];
91 AES_encrypt(tmp
, out
, key
);
92 memcpy(iv
, out
, AES_BLOCK_SIZE
);
93 size
-= AES_BLOCK_SIZE
;
95 out
+= AES_BLOCK_SIZE
;
98 for (i
= 0; i
< size
; i
++)
99 tmp
[i
] = in
[i
] ^ iv
[i
];
100 for (i
= size
; i
< AES_BLOCK_SIZE
; i
++)
102 AES_encrypt(tmp
, out
, key
);
103 memcpy(iv
, out
, AES_BLOCK_SIZE
);
106 while (size
>= AES_BLOCK_SIZE
) {
107 memcpy(tmp
, in
, AES_BLOCK_SIZE
);
108 AES_decrypt(tmp
, out
, key
);
109 for (i
= 0; i
< AES_BLOCK_SIZE
; i
++)
111 memcpy(iv
, tmp
, AES_BLOCK_SIZE
);
112 size
-= AES_BLOCK_SIZE
;
113 in
+= AES_BLOCK_SIZE
;
114 out
+= AES_BLOCK_SIZE
;
117 memcpy(tmp
, in
, AES_BLOCK_SIZE
);
118 AES_decrypt(tmp
, out
, key
);
119 for (i
= 0; i
< size
; i
++)
121 memcpy(iv
, tmp
, AES_BLOCK_SIZE
);