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1.1 root 1: /*
2: ---------------------------------------------------------------------------
3: Copyright (c) 2003, Dr Brian Gladman, Worcester, UK. All rights reserved.
4:
5: LICENSE TERMS
6:
7: The free distribution and use of this software in both source and binary
8: form is allowed (with or without changes) provided that:
9:
10: 1. distributions of this source code include the above copyright
11: notice, this list of conditions and the following disclaimer;
12:
13: 2. distributions in binary form include the above copyright
14: notice, this list of conditions and the following disclaimer
15: in the documentation and/or other associated materials;
16:
17: 3. the copyright holder's name is not used to endorse products
18: built using this software without specific written permission.
19:
20: ALTERNATIVELY, provided that this notice is retained in full, this product
21: may be distributed under the terms of the GNU General Public License (GPL),
22: in which case the provisions of the GPL apply INSTEAD OF those given above.
23:
24: DISCLAIMER
25:
26: This software is provided 'as is' with no explicit or implied warranties
27: in respect of its properties, including, but not limited to, correctness
28: and/or fitness for purpose.
29: ---------------------------------------------------------------------------
30: Issue 28/01/2004
31:
32: This file contains the definitions required to use AES in C. See aesopt.h
33: for optimisation details.
34: */
35:
36: #if !defined( _AES_H )
37: #define _AES_H
38:
39: /* This include is used to find 8 & 32 bit unsigned integer types */
1.1.1.2 ! root 40: #ifndef LINUX_DRIVER
! 41: #include <limits.h>
! 42: #else
! 43: #undef UCHAR_MAX
! 44: #define UCHAR_MAX 0xff
! 45: #undef UINT_MAX
! 46: #define UINT_MAX 4294967295
! 47: #endif
1.1 root 48:
49: #if defined(__cplusplus)
50: extern "C"
51: {
52: #endif
53:
54: #define AES_128 /* define if AES with 128 bit keys is needed */
55: #define AES_192 /* define if AES with 192 bit keys is needed */
56: #define AES_256 /* define if AES with 256 bit keys is needed */
57: #define AES_VAR /* define if a variable key size is needed */
58:
59: /* The following must also be set in assembler files if being used */
60:
61: #define AES_ENCRYPT /* if support for encryption is needed */
62: #define AES_DECRYPT /* if support for decryption is needed */
63: #define AES_ERR_CHK /* for parameter checks & error return codes */
64:
65: #if UCHAR_MAX == 0xff /* an unsigned 8 bit type */
66: typedef unsigned char aes_08t;
67: #else
68: # error Please define aes_08t as an 8-bit unsigned integer type in aes.h
69: #endif
70:
71: #if UINT_MAX == 4294967295 /* an unsigned 32 bit type */
72: typedef unsigned int aes_32t;
73: #elif ULONG_MAX == 4294967295ul
1.1.1.2 ! root 74: typedef unsigned __int32 aes_32t;
1.1 root 75: #else
76: # error Please define aes_32t as a 32-bit unsigned integer type in aes.h
77: #endif
78:
79: #define AES_BLOCK_SIZE 16 /* the AES block size in bytes */
80: #define N_COLS 4 /* the number of columns in the state */
81:
82: /* The key schedule length is 11, 13 or 15 16-byte blocks for 128, */
83: /* 192 or 256-bit keys respectively. That is 176, 208 or 240 bytes */
84: /* or 44, 52 or 60 32-bit words. For simplicity this code allocates */
85: /* the maximum 60 word array for the key schedule for all key sizes */
86:
87: #if defined( AES_VAR ) || defined( AES_256 )
88: #define KS_LENGTH 60
89: #elif defined( AES_192 )
90: #define KS_LENGTH 52
91: #else
92: #define KS_LENGTH 44
93: #endif
94:
95: #if defined( AES_ERR_CHK )
96: #define aes_ret int
97: #define aes_good 0
98: #define aes_error -1
99: #else
100: #define aes_ret void
101: #endif
102:
103: #if !defined( AES_DLL ) /* implement normal/DLL functions */
104: #define aes_rval aes_ret
105: #else
106: #define aes_rval aes_ret __declspec(dllexport) _stdcall
107: #endif
108:
109: typedef struct
110: { aes_32t ks[KS_LENGTH];
111: aes_32t rn;
112: } aes_encrypt_ctx;
113:
114: typedef struct
115: { aes_32t ks[KS_LENGTH];
116: aes_32t rn;
117: } aes_decrypt_ctx;
118:
119: /* This routine must be called before first use if non-static */
120: /* tables are being used */
121:
122: void gen_tabs(void);
123:
124: /* The key length (klen) is input in bytes when it is in the range */
125: /* 16 <= klen <= 32 or in bits when in the range 128 <= klen <= 256 */
126:
127: #if defined( AES_ENCRYPT )
128:
129: #if defined(AES_128) || defined(AES_VAR)
130: aes_rval aes_encrypt_key128(const unsigned char *in_key, aes_encrypt_ctx cx[1]);
131: #endif
132:
133: #if defined(AES_192) || defined(AES_VAR)
134: aes_rval aes_encrypt_key192(const unsigned char *in_key, aes_encrypt_ctx cx[1]);
135: #endif
136:
137: #if defined(AES_256) || defined(AES_VAR)
138: aes_rval aes_encrypt_key256(const unsigned char *in_key, aes_encrypt_ctx cx[1]);
139: #endif
140:
141: #if defined(AES_VAR)
142: aes_rval _cdecl aes_encrypt_key(const unsigned char *in_key, int key_len, aes_encrypt_ctx cx[1]);
143: #endif
144:
145: aes_rval _cdecl aes_encrypt(const unsigned char *in_blk, unsigned char *out_blk, const aes_encrypt_ctx cx[1]);
146: #endif
147:
148: #if defined( AES_DECRYPT )
149:
150: #if defined(AES_128) || defined(AES_VAR)
151: aes_rval aes_decrypt_key128(const unsigned char *in_key, aes_decrypt_ctx cx[1]);
152: #endif
153:
154: #if defined(AES_192) || defined(AES_VAR)
155: aes_rval aes_decrypt_key192(const unsigned char *in_key, aes_decrypt_ctx cx[1]);
156: #endif
157:
158: #if defined(AES_256) || defined(AES_VAR)
159: aes_rval aes_decrypt_key256(const unsigned char *in_key, aes_decrypt_ctx cx[1]);
160: #endif
161:
162: #if defined(AES_VAR)
163: aes_rval _cdecl aes_decrypt_key(const unsigned char *in_key, int key_len, aes_decrypt_ctx cx[1]);
164: #endif
165:
166: aes_rval _cdecl aes_decrypt(const unsigned char *in_blk, unsigned char *out_blk, const aes_decrypt_ctx cx[1]);
167: #endif
168:
169: #if defined(__cplusplus)
170: }
171: #endif
172:
173: #endif
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