1 | /* |
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2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
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3 | * unrestricted use provided that this legend is included on all tape |
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4 | * media and as a part of the software program in whole or part. Users |
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5 | * may copy or modify Sun RPC without charge, but are not authorized |
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6 | * to license or distribute it to anyone else except as part of a product or |
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7 | * program developed by the user. |
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8 | * |
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9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
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10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
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11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
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12 | * |
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13 | * Sun RPC is provided with no support and without any obligation on the |
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14 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
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15 | * modification or enhancement. |
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16 | * |
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17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
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18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
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19 | * OR ANY PART THEREOF. |
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20 | * |
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21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
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22 | * or profits or other special, indirect and consequential damages, even if |
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23 | * Sun has been advised of the possibility of such damages. |
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24 | * |
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25 | * Sun Microsystems, Inc. |
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26 | * 2550 Garcia Avenue |
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27 | * Mountain View, California 94043 |
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28 | */ |
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29 | /* |
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30 | * des_crypt.c, DES encryption library routines |
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31 | * Copyright (C) 1986, Sun Microsystems, Inc. |
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32 | */ |
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33 | |
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34 | #include <sys/types.h> |
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35 | #include <rpc/des_crypt.h> |
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36 | #include <rpc/des.h> |
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37 | |
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38 | #ifndef lint |
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39 | /* from: static char sccsid[] = "@(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI"; */ |
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40 | static const char rcsid[] = "$FreeBSD: src/lib/libc/rpc/des_crypt.c,v 1.3 1999/08/28 00:00:38 peter Exp $"; |
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41 | #endif |
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42 | |
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43 | static int common_crypt __P(( char *, char *, register unsigned, unsigned, struct desparams * )); |
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44 | int (*__des_crypt_LOCAL)() = 0; |
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45 | extern _des_crypt_call __P(( char *, int, struct desparams * )); |
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46 | /* |
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47 | * Copy 8 bytes |
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48 | */ |
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49 | #define COPY8(src, dst) { \ |
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50 | register char *a = (char *) dst; \ |
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51 | register char *b = (char *) src; \ |
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52 | *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ |
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53 | *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ |
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54 | } |
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55 | |
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56 | /* |
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57 | * Copy multiple of 8 bytes |
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58 | */ |
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59 | #define DESCOPY(src, dst, len) { \ |
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60 | register char *a = (char *) dst; \ |
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61 | register char *b = (char *) src; \ |
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62 | register int i; \ |
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63 | for (i = (int) len; i > 0; i -= 8) { \ |
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64 | *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ |
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65 | *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ |
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66 | } \ |
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67 | } |
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68 | |
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69 | /* |
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70 | * CBC mode encryption |
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71 | */ |
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72 | int |
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73 | cbc_crypt(key, buf, len, mode, ivec) |
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74 | char *key; |
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75 | char *buf; |
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76 | unsigned len; |
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77 | unsigned mode; |
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78 | char *ivec; |
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79 | { |
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80 | int err; |
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81 | struct desparams dp; |
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82 | |
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83 | #ifdef BROKEN_DES |
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84 | dp.UDES.UDES_buf = buf; |
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85 | dp.des_mode = ECB; |
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86 | #else |
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87 | dp.des_mode = CBC; |
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88 | #endif |
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89 | COPY8(ivec, dp.des_ivec); |
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90 | err = common_crypt(key, buf, len, mode, &dp); |
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91 | COPY8(dp.des_ivec, ivec); |
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92 | return(err); |
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93 | } |
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94 | |
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95 | |
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96 | /* |
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97 | * ECB mode encryption |
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98 | */ |
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99 | int |
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100 | ecb_crypt(key, buf, len, mode) |
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101 | char *key; |
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102 | char *buf; |
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103 | unsigned len; |
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104 | unsigned mode; |
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105 | { |
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106 | struct desparams dp; |
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107 | |
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108 | #ifdef BROKEN_DES |
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109 | dp.UDES.UDES_buf = buf; |
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110 | dp.des_mode = CBC; |
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111 | #else |
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112 | dp.des_mode = ECB; |
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113 | #endif |
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114 | return(common_crypt(key, buf, len, mode, &dp)); |
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115 | } |
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116 | |
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117 | |
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118 | |
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119 | /* |
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120 | * Common code to cbc_crypt() & ecb_crypt() |
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121 | */ |
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122 | static int |
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123 | common_crypt(key, buf, len, mode, desp) |
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124 | char *key; |
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125 | char *buf; |
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126 | register unsigned len; |
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127 | unsigned mode; |
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128 | register struct desparams *desp; |
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129 | { |
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130 | register int desdev; |
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131 | |
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132 | if ((len % 8) != 0 || len > DES_MAXDATA) { |
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133 | return(DESERR_BADPARAM); |
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134 | } |
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135 | desp->des_dir = |
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136 | ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT; |
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137 | |
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138 | desdev = mode & DES_DEVMASK; |
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139 | COPY8(key, desp->des_key); |
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140 | /* |
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141 | * software |
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142 | */ |
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143 | if (__des_crypt_LOCAL != NULL) { |
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144 | if (!__des_crypt_LOCAL(buf, len, desp)) { |
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145 | return (DESERR_HWERROR); |
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146 | } |
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147 | } else { |
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148 | if (!_des_crypt_call(buf, len, desp)) { |
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149 | return (DESERR_HWERROR); |
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150 | } |
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151 | } |
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152 | return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE); |
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153 | } |
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