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source:
trunk/third/gnome-keyring/aes.h
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Revision 21094, 3.2 KB checked in by ghudson, 20 years ago (diff) |
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1 | /* |

2 | * Copyright (c) 2002, 2003 Bob Deblier |

3 | * |

4 | * This library is free software; you can redistribute it and/or |

5 | * modify it under the terms of the GNU Lesser General Public |

6 | * License as published by the Free Software Foundation; either |

7 | * version 2.1 of the License, or (at your option) any later version. |

8 | * |

9 | * This library is distributed in the hope that it will be useful, |

10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |

11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |

12 | * Lesser General Public License for more details. |

13 | * |

14 | * You should have received a copy of the GNU Lesser General Public |

15 | * License along with this library; if not, write to the Free Software |

16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |

17 | * |

18 | */ |

19 | |

20 | /*!\file aes.h |

21 | * \brief AES block cipher, as specified by NIST FIPS 197. |

22 | * \author Bob Deblier <bob.deblier@pandora.be> |

23 | * \ingroup BC_m BC_aes_m |

24 | */ |

25 | |

26 | #ifndef _AES_H |

27 | #define _AES_H |

28 | |

29 | #include <glib.h> |

30 | #include "beecrypt_compat.h" |

31 | |

32 | /*!\brief Holds all the parameters necessary for the AES cipher. |

33 | * \ingroup BC_aes_m |

34 | */ |

35 | typedef struct |

36 | { |

37 | /*!\var k |

38 | * \brief Holds the key expansion. |

39 | */ |

40 | guint32 k[64]; |

41 | /*!\var nr |

42 | * \brief Number of rounds to be used in encryption/decryption. |

43 | */ |

44 | guint32 nr; |

45 | /*!\var fdback |

46 | * \brief Buffer to be used by block chaining or feedback modes. |

47 | */ |

48 | guint32 fdback[4]; |

49 | } aesParam; |

50 | |

51 | #ifdef __cplusplus |

52 | extern "C" { |

53 | #endif |

54 | |

55 | /*!\fn int aesSetup(aesParam* ap, const byte* key, size_t keybits, cipherOperation op) |

56 | * \brief This function performs the cipher's key expansion. |

57 | * \param ap The cipher's parameter block. |

58 | * \param key The key value. |

59 | * \param keybits The number of bits in the key; legal values are: |

60 | * 128, 192 and 256. |

61 | * \param op ENCRYPT or DECRYPT. |

62 | * \retval 0 on success. |

63 | * \retval -1 on failure. |

64 | */ |

65 | |

66 | int aesSetup (aesParam* ap, const byte* key, size_t keybits, cipherOperation op); |

67 | |

68 | /*!\fn int aesSetIV(aesParam* ap, const byte* iv) |

69 | * \brief This function sets the Initialization Vector. |

70 | * \note This function is only useful in block chaining or feedback modes. |

71 | * \param ap The cipher's parameter block. |

72 | * \param iv The initialization vector; may be null. |

73 | * \retval 0 on success. |

74 | */ |

75 | |

76 | int aesSetIV (aesParam* ap, const byte* iv); |

77 | |

78 | /*!\fn aesEncrypt(aesParam* ap, guint32* dst, const guint32* src) |

79 | * \brief This function performs the raw AES encryption; it encrypts one block |

80 | * of 128 bits. |

81 | * \param ap The cipher's parameter block. |

82 | * \param dst The ciphertext; should be aligned on 32-bit boundary. |

83 | * \param src The cleartext; should be aligned on 32-bit boundary. |

84 | * \retval 0 on success. |

85 | */ |

86 | |

87 | int aesEncrypt (aesParam* ap, guint32* dst, const guint32* src); |

88 | |

89 | /*!\fn aesDecrypt(aesParam* ap, guint32* dst, const guint32* src) |

90 | * \brief This function performs the raw AES decryption; it decrypts one block |

91 | * of 128 bits. |

92 | * \param ap The cipher's parameter block. |

93 | * \param dst The cleartext; should be aligned on 32-bit boundary. |

94 | * \param src The ciphertext; should be aligned on 32-bit boundary. |

95 | * \retval 0 on success. |

96 | */ |

97 | |

98 | int aesDecrypt (aesParam* ap, guint32* dst, const guint32* src); |

99 | |

100 | |

101 | guint32* aesFeedback(aesParam* ap); |

102 | |

103 | #ifdef __cplusplus |

104 | } |

105 | #endif |

106 | |

107 | #endif |

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