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6725 | siemargl | 1 | /* |
2 | Copyright (c) 1990-2007 Info-ZIP. All rights reserved. |
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3 | |||
4 | See the accompanying file LICENSE, version 2005-Feb-10 or later |
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5 | (the contents of which are also included in (un)zip.h) for terms of use. |
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6 | If, for some reason, all these files are missing, the Info-ZIP license |
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7 | also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html |
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8 | */ |
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9 | /* |
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10 | crypt.h (full version) by Info-ZIP. Last revised: [see CR_VERSION_DATE] |
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11 | |||
12 | The main encryption/decryption source code for Info-Zip software was |
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13 | originally written in Europe. To the best of our knowledge, it can |
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14 | be freely distributed in both source and object forms from any country, |
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15 | including the USA under License Exception TSU of the U.S. Export |
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16 | Administration Regulations (section 740.13(e)) of 6 June 2002. |
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17 | |||
18 | NOTE on copyright history: |
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19 | Previous versions of this source package (up to version 2.8) were |
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20 | not copyrighted and put in the public domain. If you cannot comply |
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21 | with the Info-Zip LICENSE, you may want to look for one of those |
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22 | public domain versions. |
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23 | */ |
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24 | |||
25 | #ifndef __crypt_h /* don't include more than once */ |
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26 | #define __crypt_h |
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27 | |||
28 | #ifdef CRYPT |
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29 | # undef CRYPT |
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30 | #endif |
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31 | /* |
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32 | Logic of selecting "full crypt" code: |
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33 | a) default behaviour: |
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34 | - dummy crypt code when compiling UnZipSFX stub, to minimize size |
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35 | - full crypt code when used to compile Zip, UnZip and fUnZip |
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36 | b) USE_CRYPT defined: |
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37 | - always full crypt code |
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38 | c) NO_CRYPT defined: |
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39 | - never full crypt code |
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40 | NO_CRYPT takes precedence over USE_CRYPT |
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41 | */ |
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42 | #if defined(NO_CRYPT) |
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43 | # define CRYPT 0 /* dummy version */ |
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44 | #else |
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45 | #if defined(USE_CRYPT) |
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46 | # define CRYPT 1 /* full version */ |
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47 | #else |
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48 | #if !defined(SFX) |
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49 | # define CRYPT 1 /* full version for zip and main unzip */ |
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50 | #else |
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51 | # define CRYPT 0 /* dummy version for unzip sfx */ |
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52 | #endif |
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53 | #endif /* ?USE_CRYPT */ |
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54 | #endif /* ?NO_CRYPT */ |
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55 | |||
56 | #if CRYPT |
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57 | /* full version */ |
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58 | |||
59 | #ifdef CR_BETA |
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60 | # undef CR_BETA /* this is not a beta release */ |
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61 | #endif |
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62 | |||
63 | #define CR_MAJORVER 2 |
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64 | #define CR_MINORVER 11 |
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65 | #ifdef CR_BETA |
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66 | # define CR_BETA_VER "c BETA" |
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67 | # define CR_VERSION_DATE "05 Jan 2007" /* last real code change */ |
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68 | #else |
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69 | # define CR_BETA_VER "" |
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70 | # define CR_VERSION_DATE "05 Jan 2007" /* last public release date */ |
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71 | # define CR_RELEASE |
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72 | #endif |
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73 | |||
74 | #ifndef __G /* UnZip only, for now (DLL stuff) */ |
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75 | # define __G |
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76 | # define __G__ |
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77 | # define __GDEF |
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78 | # define __GPRO void |
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79 | # define __GPRO__ |
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80 | #endif |
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81 | |||
82 | #if defined(MSDOS) || defined(OS2) || defined(WIN32) |
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83 | # ifndef DOS_OS2_W32 |
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84 | # define DOS_OS2_W32 |
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85 | # endif |
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86 | #endif |
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87 | |||
88 | #if defined(DOS_OS2_W32) || defined(__human68k__) |
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89 | # ifndef DOS_H68_OS2_W32 |
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90 | # define DOS_H68_OS2_W32 |
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91 | # endif |
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92 | #endif |
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93 | |||
94 | #if defined(VM_CMS) || defined(MVS) |
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95 | # ifndef CMS_MVS |
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96 | # define CMS_MVS |
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97 | # endif |
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98 | #endif |
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99 | |||
100 | /* To allow combining of Zip and UnZip static libraries in a single binary, |
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101 | * the Zip and UnZip versions of the crypt core functions have to be named |
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102 | * differently. |
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103 | */ |
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104 | #ifdef ZIP |
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105 | # ifdef REALLY_SHORT_SYMS |
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106 | # define decrypt_byte zdcrby |
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107 | # else |
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108 | # define decrypt_byte zp_decrypt_byte |
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109 | # endif |
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110 | # define update_keys zp_update_keys |
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111 | # define init_keys zp_init_keys |
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112 | #else /* !ZIP */ |
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113 | # ifdef REALLY_SHORT_SYMS |
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114 | # define decrypt_byte dcrbyt |
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115 | # endif |
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116 | #endif /* ?ZIP */ |
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117 | |||
118 | #define IZ_PWLEN 80 /* input buffer size for reading encryption key */ |
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119 | #ifndef PWLEN /* for compatibility with previous zcrypt release... */ |
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120 | # define PWLEN IZ_PWLEN |
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121 | #endif |
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122 | #define RAND_HEAD_LEN 12 /* length of encryption random header */ |
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123 | |||
124 | /* the crc_32_tab array has to be provided externally for the crypt calculus */ |
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125 | |||
126 | /* encode byte c, using temp t. Warning: c must not have side effects. */ |
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127 | #define zencode(c,t) (t=decrypt_byte(__G), update_keys(c), t^(c)) |
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128 | |||
129 | /* decode byte c in place */ |
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130 | #define zdecode(c) update_keys(__G__ c ^= decrypt_byte(__G)) |
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131 | |||
132 | int decrypt_byte OF((__GPRO)); |
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133 | int update_keys OF((__GPRO__ int c)); |
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134 | void init_keys OF((__GPRO__ ZCONST char *passwd)); |
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135 | |||
136 | #ifdef ZIP |
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137 | void crypthead OF((ZCONST char *, ulg, FILE *)); |
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138 | # ifdef UTIL |
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139 | int zipcloak OF((struct zlist far *, FILE *, FILE *, ZCONST char *)); |
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140 | int zipbare OF((struct zlist far *, FILE *, FILE *, ZCONST char *)); |
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141 | # else |
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142 | unsigned zfwrite OF((zvoid *, extent, extent, FILE *)); |
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143 | extern char *key; |
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144 | # endif |
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145 | #endif /* ZIP */ |
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146 | |||
147 | #if (defined(UNZIP) && !defined(FUNZIP)) |
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148 | int decrypt OF((__GPRO__ ZCONST char *passwrd)); |
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149 | #endif |
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150 | |||
151 | #ifdef FUNZIP |
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152 | extern int encrypted; |
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153 | # ifdef NEXTBYTE |
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154 | # undef NEXTBYTE |
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155 | # endif |
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156 | # define NEXTBYTE \ |
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157 | (encrypted? update_keys(__G__ getc(G.in)^decrypt_byte(__G)) : getc(G.in)) |
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158 | #endif /* FUNZIP */ |
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159 | |||
160 | #else /* !CRYPT */ |
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161 | /* dummy version */ |
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162 | |||
163 | #define zencode |
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164 | #define zdecode |
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165 | |||
166 | #define zfwrite fwrite |
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167 | |||
168 | #endif /* ?CRYPT */ |
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169 | #endif /* !__crypt_h */ |