1 | /* $Id$ |
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2 | * |
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3 | * Utility program to generate a public/private key pair |
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4 | * |
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5 | * Copyright (C) 1998 by the Massachusetts Institute of Technology |
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6 | * For copying and distribution information, please see the file |
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7 | * <mit-copyright.h>. |
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8 | * |
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9 | */ |
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10 | |
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11 | #include <mit-copyright.h> |
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12 | #include <moira.h> |
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13 | #include "reg_svr.h" |
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14 | |
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15 | #include <sys/param.h> |
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16 | |
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17 | #include <errno.h> |
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18 | #include <stdio.h> |
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19 | #include <stdlib.h> |
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20 | #include <string.h> |
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21 | |
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22 | #include <com_err.h> |
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23 | |
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24 | /* RSARef includes */ |
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25 | #include "global.h" |
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26 | #include "rsaref.h" |
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27 | |
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28 | RCSID("$Header$"); |
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29 | |
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30 | void printhex(FILE *out, unsigned char *buf, int len); |
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31 | |
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32 | int main(int argc, char **argv) |
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33 | { |
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34 | R_RSA_PRIVATE_KEY private; |
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35 | R_RSA_PUBLIC_KEY public; |
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36 | R_RSA_PROTO_KEY proto; |
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37 | R_RANDOM_STRUCT random; |
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38 | FILE *in, *out; |
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39 | int needed; |
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40 | unsigned char *buf; |
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41 | char pubname[MAXPATHLEN], oldname[MAXPATHLEN]; |
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42 | char *whoami = argv[0], *inname = argv[1], *outname = argv[2]; |
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43 | |
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44 | if (strchr(whoami, '/')) |
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45 | whoami = strrchr(whoami, '/'); |
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46 | |
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47 | if (argc != 3) |
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48 | { |
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49 | com_err(NULL, 0, "Usage: %s infile outfile\n" |
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50 | "where infile is a file of random data", whoami); |
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51 | exit(1); |
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52 | } |
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53 | in = fopen(inname, "r"); |
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54 | if (!in) |
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55 | { |
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56 | com_err(whoami, errno, "trying to open %s", inname); |
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57 | exit(1); |
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58 | } |
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59 | |
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60 | R_RandomInit(&random); |
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61 | R_GetRandomBytesNeeded(&needed, &random); |
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62 | buf = malloc(needed); |
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63 | if (fread(buf, needed, 1, in) != 1) |
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64 | { |
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65 | com_err(whoami, 0, "Not enough random input data: need %d bytes\n", |
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66 | needed); |
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67 | exit(1); |
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68 | } |
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69 | R_RandomUpdate(&random, buf, needed); |
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70 | |
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71 | proto.bits = 1024; |
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72 | proto.useFermat4 = 1; |
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73 | |
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74 | if (R_GeneratePEMKeys(&public, &private, &proto, &random)) |
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75 | { |
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76 | com_err(whoami, 0, "Couldn't generate key"); |
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77 | exit(1); |
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78 | } |
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79 | |
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80 | sprintf(oldname, "%s.old", outname); |
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81 | rename(outname, oldname); |
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82 | out = fopen(outname, "w"); |
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83 | if (!out) |
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84 | { |
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85 | com_err(whoami, errno, "opening %s", outname); |
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86 | exit(1); |
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87 | } |
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88 | if (fwrite(&private, sizeof(private), 1, out) != 1) |
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89 | { |
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90 | com_err(whoami, errno, "writing %s", outname); |
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91 | exit(1); |
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92 | } |
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93 | fclose(out); |
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94 | |
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95 | sprintf(pubname, "%s.pub", outname); |
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96 | sprintf(oldname, "%s.old", pubname); |
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97 | rename(pubname, oldname); |
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98 | out = fopen(pubname, "w"); |
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99 | if (!out) |
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100 | { |
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101 | com_err(whoami, errno, "opening %s", pubname); |
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102 | exit(1); |
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103 | } |
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104 | if (fwrite(&public, sizeof(public), 1, out) != 1) |
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105 | { |
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106 | com_err(whoami, errno, "writing %s", pubname); |
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107 | exit(1); |
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108 | } |
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109 | fclose(out); |
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110 | |
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111 | sprintf(pubname, "%s.pub.txt", outname); |
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112 | out = fopen(pubname, "w"); |
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113 | if (!out) |
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114 | { |
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115 | com_err(whoami, errno, "opening %s", pubname); |
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116 | exit(1); |
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117 | } |
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118 | printhex(out, public.modulus, MAX_RSA_MODULUS_LEN); |
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119 | fclose(out); |
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120 | |
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121 | exit(0); |
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122 | } |
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123 | |
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124 | char hexd[] = { '0', '1', '2', '3', '4', '5', '6', '7', |
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125 | '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; |
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126 | |
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127 | void printhex(FILE *out, unsigned char *buf, int len) |
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128 | { |
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129 | while (len--) |
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130 | { |
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131 | fprintf(out, "%c%c", hexd[*buf>>4], hexd[*buf%0x10]); |
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132 | buf++; |
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133 | } |
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134 | } |
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