1 | |
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2 | /* abac_openssl.c */ |
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3 | |
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4 | #define _GNU_SOURCE |
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5 | #include <stdio.h> |
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6 | #include <stdlib.h> |
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7 | #include <assert.h> |
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8 | #include <ctype.h> |
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9 | #include <unistd.h> |
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10 | |
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11 | #include <fcntl.h> |
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12 | #include <sys/types.h> |
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13 | #include <sys/stat.h> |
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14 | #include <sys/mman.h> |
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15 | #include <time.h> |
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16 | |
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17 | #include <stdbool.h> |
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18 | |
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19 | #include <openssl/conf.h> |
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20 | #include <openssl/x509.h> |
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21 | #include <openssl/x509v3.h> |
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22 | #include <openssl/x509_vfy.h> |
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23 | |
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24 | #include <openssl/rsa.h> |
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25 | #include <openssl/evp.h> |
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26 | #include <openssl/err.h> |
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27 | #include <openssl/pem.h> |
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28 | #include <openssl/ssl.h> |
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29 | #include <openssl/sha.h> |
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30 | #include <openssl/rand.h> |
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31 | |
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32 | |
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33 | #ifdef HAVE_READPASSPHRASE |
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34 | # include <readpassphrase.h> |
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35 | #else |
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36 | # include "compat/readpassphrase.h" |
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37 | #endif |
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38 | |
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39 | static int debug=0; |
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40 | |
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41 | int _potato_cb(char *buf, int sz, int rwflag, void *u); |
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42 | |
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43 | /***********************************************************************/ |
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44 | int init_openssl() { |
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45 | if(debug) ERR_load_crypto_strings(); |
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46 | OpenSSL_add_all_algorithms(); |
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47 | return 0; |
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48 | } |
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49 | |
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50 | int deinit_openssl() { |
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51 | CRYPTO_cleanup_all_ex_data(); |
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52 | return 0; |
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53 | } |
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54 | |
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55 | /* int RAND_bytes(unsigned char *buf, int num); */ |
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56 | unsigned char *abac_generate_serial() { |
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57 | unsigned char *serial=(unsigned char *) malloc(sizeof(unsigned char)*8); |
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58 | |
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59 | memset(serial, '\0', 8); |
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60 | |
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61 | if(!RAND_bytes(serial,8)) { |
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62 | fprintf(stderr,"RAT, RAN^D out of seeds!!!\n"); |
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63 | assert(0); |
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64 | } |
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65 | // zap leading 0's |
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66 | while (serial[0] == 0) |
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67 | RAND_bytes(&serial[0],1); |
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68 | |
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69 | RAND_cleanup(); |
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70 | return serial; |
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71 | } |
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72 | |
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73 | |
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74 | static BIGNUM *_make_bn_from_string(unsigned char *str) |
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75 | { |
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76 | assert(str); |
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77 | BIGNUM *tmp; |
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78 | tmp=BN_bin2bn(str,8,NULL); |
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79 | /* BN_print_fp(stderr,tmp); */ |
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80 | int n=BN_num_bytes(tmp); |
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81 | if(n) return tmp; |
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82 | return NULL; |
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83 | } |
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84 | |
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85 | unsigned char *_encode_m64(unsigned char *orig_ptr, int orig_len) |
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86 | { |
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87 | BIO *mbio,*b64bio,*bio; |
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88 | |
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89 | unsigned char *m64_ptr=NULL; |
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90 | int m64_len=0; |
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91 | |
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92 | unsigned char *ptr=NULL; |
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93 | |
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94 | if(orig_len==0) return NULL; |
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95 | |
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96 | /*bio pointing at b64->mem, the base64 bio encodes on |
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97 | write and decodes on read */ |
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98 | mbio=BIO_new(BIO_s_mem()); |
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99 | b64bio=BIO_new(BIO_f_base64()); |
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100 | bio=BIO_push(b64bio,mbio); |
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101 | |
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102 | BIO_write(bio,orig_ptr,orig_len); |
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103 | |
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104 | /* We need to 'flush' things to push out the encoding of the |
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105 | * last few bytes. There is special encoding if it is not a |
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106 | * multiple of 3 |
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107 | */ |
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108 | BIO_flush(bio); |
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109 | |
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110 | /* pointer to the data and the number of elements. */ |
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111 | m64_len=(int)BIO_ctrl(mbio,BIO_CTRL_INFO,0,ptr); |
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112 | |
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113 | if(m64_len!=0) { |
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114 | m64_ptr=malloc(m64_len+1); |
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115 | if(m64_ptr) { |
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116 | strcpy((char *)m64_ptr, (char *)ptr); |
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117 | } else { |
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118 | fprintf(stderr,"ERROR: malloc failed\n"); |
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119 | } |
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120 | } |
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121 | |
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122 | /* This call will walk the chain freeing all the BIOs */ |
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123 | BIO_free_all(bio); |
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124 | return m64_ptr; |
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125 | } |
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126 | |
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127 | unsigned char *_decode_m64(unsigned char *m64_ptr, int m64_len) |
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128 | { |
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129 | unsigned char *orig_ptr=NULL; |
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130 | int orig_len=0; |
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131 | |
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132 | BIO *b64bio, *mbio, *bio; |
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133 | char *ptr=NULL; |
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134 | |
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135 | if(m64_len==0) return NULL; |
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136 | |
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137 | ptr = (char *)malloc(sizeof(char)*m64_len); |
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138 | memset(ptr, '\0', m64_len); |
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139 | |
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140 | b64bio = BIO_new(BIO_f_base64()); |
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141 | mbio = BIO_new_mem_buf(m64_ptr, m64_len); |
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142 | bio = BIO_push(b64bio, mbio); |
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143 | |
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144 | orig_len=BIO_read(bio, ptr, m64_len); |
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145 | |
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146 | if(orig_len) { |
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147 | orig_ptr=malloc(orig_len+1); |
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148 | if(orig_ptr) |
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149 | strcpy((char *)orig_ptr, ptr); |
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150 | else fprintf(stderr,"ERROR: malloc failed..\n"); |
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151 | } |
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152 | |
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153 | BIO_free_all(bio); |
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154 | return orig_ptr; |
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155 | } |
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156 | |
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157 | /*** not used |
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158 | static char *_read_blob_from_file(char *fname, int *len) |
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159 | { |
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160 | struct stat sb; |
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161 | char *dptr=NULL; |
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162 | |
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163 | int fd = open(fname, O_RDONLY); |
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164 | if (fd == -1) { return NULL; } |
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165 | if(stat(fname, &sb) == -1) { |
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166 | close(fd); |
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167 | return NULL; |
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168 | } |
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169 | dptr= (char *)mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0); |
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170 | close(fd); |
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171 | |
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172 | if(dptr == MAP_FAILED) { |
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173 | return NULL; |
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174 | } |
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175 | *len=sb.st_size; |
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176 | return dptr; |
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177 | } |
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178 | ***/ |
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179 | |
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180 | /* Read ID in PEM */ |
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181 | X509 *abac_load_id_from_fp(FILE *fp) |
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182 | { |
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183 | X509 *cert=PEM_read_X509(fp,NULL,NULL,NULL); |
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184 | |
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185 | if (cert == NULL) { |
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186 | if(debug) ERR_print_errors_fp (stderr); |
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187 | return NULL; |
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188 | } |
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189 | return cert; |
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190 | } |
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191 | |
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192 | X509 *abac_load_id_from_chunk(unsigned char *chunk_ptr, int chunk_len) |
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193 | { |
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194 | X509 *n509=NULL; |
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195 | BIO *mbio=BIO_new(BIO_s_mem()); |
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196 | |
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197 | BIO_write(mbio,chunk_ptr,chunk_len); |
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198 | BIO_flush(mbio); |
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199 | |
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200 | PEM_read_bio_X509(mbio,&n509,NULL,NULL); |
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201 | |
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202 | BIO_free_all(mbio); |
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203 | |
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204 | if (n509 == NULL) { |
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205 | if(debug) ERR_print_errors_fp (stderr); |
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206 | return NULL; |
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207 | } |
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208 | return n509; |
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209 | } |
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210 | |
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211 | int abac_write_id_to_fp(X509 *cert, FILE *fp) |
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212 | { |
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213 | assert(cert); |
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214 | |
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215 | if(!PEM_write_X509(fp,cert)) { |
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216 | if(debug) ERR_print_errors_fp (stderr); |
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217 | return 1; |
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218 | } |
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219 | return 0; |
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220 | } |
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221 | |
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222 | /* make stringfy a private key PEM struct */ |
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223 | unsigned char *abac_string_privkey(EVP_PKEY *key) |
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224 | { |
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225 | unsigned char *ptr=NULL; |
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226 | unsigned char *tmp=NULL; |
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227 | |
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228 | assert(key); |
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229 | |
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230 | BIO *mbio=BIO_new(BIO_s_mem()); |
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231 | /* PEM_write_PrivateKey(fp,key,NULL,NULL,0,_potato_cb, "privateKey to file"); */ |
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232 | PEM_write_bio_PrivateKey(mbio,key,NULL,NULL,0,_potato_cb,"stringify privateKey"); |
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233 | BIO_flush(mbio); |
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234 | int len=(int)BIO_ctrl(mbio,BIO_CTRL_INFO,0,tmp); |
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235 | |
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236 | if(debug) fprintf(stderr,"CHUNKING PrivateKey... %d\n",len); |
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237 | |
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238 | if(len) { |
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239 | ptr=(unsigned char *)malloc(sizeof(unsigned char *)*(len+1)); |
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240 | int ret=BIO_read(mbio, (void *)ptr, len); |
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241 | if(ret==0) |
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242 | fprintf(stderr," abac_string_privkey failed!!\n"); |
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243 | ptr[len]='\0'; |
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244 | } |
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245 | BIO_free_all(mbio); |
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246 | return ptr; |
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247 | } |
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248 | |
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249 | /* make stringfy a x509 PEM struct */ |
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250 | unsigned char *abac_string_cert(X509 *cert) { |
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251 | unsigned char *ptr=NULL; |
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252 | unsigned char *tmp=NULL; |
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253 | |
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254 | assert(cert); |
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255 | |
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256 | BIO *mbio=BIO_new(BIO_s_mem()); |
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257 | PEM_write_bio_X509(mbio,cert); |
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258 | BIO_flush(mbio); |
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259 | int len=(int)BIO_ctrl(mbio,BIO_CTRL_INFO,0,tmp); |
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260 | if(debug) fprintf(stderr,"CHUNKING X509... %d\n",len); |
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261 | |
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262 | if(len) { |
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263 | ptr=(unsigned char *)malloc(sizeof(unsigned char *)*(len+1)); |
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264 | int ret=BIO_read(mbio, (void *)ptr, len); |
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265 | if(ret==0) |
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266 | fprintf(stderr," abac_string_cert failed!!\n"); |
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267 | ptr[len]='\0'; |
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268 | } |
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269 | |
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270 | BIO_free_all(mbio); |
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271 | return ptr; |
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272 | } |
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273 | |
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274 | |
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275 | /* not used, sign data with privkey |
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276 | static int _sign_with_privkey(EVP_PKEY *privkey, char *data, |
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277 | unsigned char* signed_buf) |
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278 | { |
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279 | int err; |
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280 | unsigned int signed_len; |
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281 | EVP_MD_CTX md_ctx; |
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282 | |
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283 | EVP_SignInit (&md_ctx, EVP_md5()); |
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284 | EVP_SignUpdate (&md_ctx, data, strlen(data)); |
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285 | signed_len = sizeof(signed_buf); |
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286 | err = EVP_SignFinal (&md_ctx, |
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287 | signed_buf, |
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288 | &signed_len, |
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289 | privkey); |
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290 | if (err != 1) { |
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291 | if(debug) ERR_print_errors_fp (stderr); |
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292 | return 1; |
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293 | } |
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294 | return 0; |
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295 | } |
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296 | **/ |
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297 | |
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298 | /* nost used, verify the signature.. |
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299 | static int _verify_with_pubkey(EVP_PKEY *pubkey, char *data, |
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300 | unsigned char* signed_buf ) |
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301 | { |
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302 | int err; |
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303 | int signed_len; |
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304 | EVP_MD_CTX md_ctx; |
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305 | |
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306 | EVP_VerifyInit (&md_ctx, EVP_sha1()); |
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307 | EVP_VerifyUpdate (&md_ctx, data, strlen((char*)data)); |
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308 | signed_len=sizeof(signed_buf); |
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309 | err = EVP_VerifyFinal (&md_ctx, |
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310 | signed_buf, |
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311 | signed_len, |
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312 | pubkey); |
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313 | |
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314 | if (err != 1) { |
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315 | if(debug) ERR_print_errors_fp (stderr); |
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316 | return 1; |
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317 | } |
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318 | fprintf(stderr, "Signature Verified Ok.\n"); |
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319 | return 0; |
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320 | } |
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321 | ***/ |
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322 | |
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323 | |
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324 | #define PWLEN 128 |
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325 | /* EVP_PKEY *PEM_read_PrivateKey(FILE *,EVP_PKEY **,pem_cb *,void *) */ |
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326 | int _potato_cb(char *buf, int sz, int rwflag, void *u) |
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327 | { |
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328 | int len; |
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329 | char *prompt=NULL; |
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330 | int rc; |
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331 | if(u) |
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332 | rc=asprintf(&prompt,"Enter passphrase for %s:", (char *)u); |
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333 | else rc=asprintf(&prompt,"Enter passphrase :"); |
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334 | char *secret = malloc(PWLEN); |
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335 | memset(secret, '\0', PWLEN); |
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336 | if(!secret) { |
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337 | perror("malloc()"); |
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338 | free(prompt); |
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339 | return 0; |
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340 | } |
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341 | if (readpassphrase( prompt, secret, PWLEN, RPP_ECHO_OFF) == NULL) { |
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342 | perror("readpassphrase()"); |
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343 | memset(secret, '\0', PWLEN); |
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344 | len=0; |
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345 | } else { |
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346 | len=strlen(secret); |
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347 | memcpy(buf, secret, len); |
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348 | memset(secret, '\0', len); |
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349 | } |
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350 | free(secret); |
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351 | free(prompt); |
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352 | return len; |
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353 | } |
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354 | |
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355 | EVP_PKEY *abac_load_privkey_from_chunk(unsigned char *chunk_ptr, int chunk_len) |
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356 | { |
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357 | EVP_PKEY *nkey=NULL; |
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358 | BIO *mbio=BIO_new(BIO_s_mem()); |
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359 | |
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360 | BIO_write(mbio,chunk_ptr,chunk_len); |
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361 | BIO_flush(mbio); |
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362 | |
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363 | PEM_read_bio_PrivateKey(mbio,&nkey,NULL,NULL); |
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364 | |
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365 | BIO_free_all(mbio); |
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366 | |
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367 | if (nkey == NULL) { |
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368 | if(debug) ERR_print_errors_fp (stderr); |
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369 | return NULL; |
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370 | } |
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371 | return nkey; |
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372 | } |
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373 | |
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374 | EVP_PKEY *abac_load_privkey_from_fp(FILE *fp) |
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375 | { |
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376 | assert(fp); |
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377 | |
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378 | EVP_PKEY *privkey = PEM_read_PrivateKey(fp, NULL, _potato_cb, "privateKey from file"); |
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379 | |
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380 | if (privkey == NULL) { |
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381 | if(debug) ERR_print_errors_fp (stderr); |
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382 | return NULL; |
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383 | } |
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384 | return privkey; |
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385 | } |
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386 | |
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387 | /* not adding passphrase */ |
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388 | int abac_write_privkey_to_fp(EVP_PKEY *key, FILE *fp) { |
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389 | assert(key); |
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390 | |
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391 | if(!PEM_write_PrivateKey(fp,key,NULL,NULL,0,NULL, NULL)) { |
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392 | if(debug) ERR_print_errors_fp (stderr); |
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393 | return 1; |
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394 | } |
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395 | return 0; |
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396 | } |
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397 | |
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398 | /* adding passphrase */ |
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399 | int abac_write_encrypt_privkey_to_fp(EVP_PKEY *key, FILE *fp) { |
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400 | assert(key); |
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401 | |
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402 | if(!PEM_write_PrivateKey(fp,key,NULL,NULL,0,_potato_cb, "privateKey to file")) { |
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403 | if(debug) ERR_print_errors_fp (stderr); |
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404 | return 1; |
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405 | } |
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406 | return 0; |
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407 | } |
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408 | |
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409 | EVP_PKEY *extract_pubkey_from_cert(X509 *cert) |
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410 | { |
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411 | EVP_PKEY *pubkey=X509_get_pubkey(cert); |
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412 | return pubkey; |
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413 | } |
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414 | |
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415 | |
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416 | /** not used, |
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417 | static void _callback(int p, int n, void *arg) |
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418 | { |
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419 | char c='B'; |
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420 | |
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421 | if (p == 0) c='.'; |
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422 | if (p == 1) c='+'; |
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423 | if (p == 2) c='*'; |
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424 | if (p == 3) c='\n'; |
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425 | fputc(c,stderr); |
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426 | } |
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427 | ***/ |
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428 | |
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429 | /* |
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430 | RSA *RSA_generate_key(int num, unsigned long e, |
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431 | void (*callback)(int,int,void *), void *cb_arg); |
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432 | The exponent is an odd number, typically 3, 17 or 65537 |
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433 | */ |
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434 | EVP_PKEY* abac_generate_key() |
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435 | { |
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436 | EVP_PKEY *pk=NULL; |
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437 | int keysize=2048; |
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438 | |
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439 | if((pk=EVP_PKEY_new()) == NULL){ |
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440 | if(debug) ERR_print_errors_fp (stderr); |
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441 | return NULL; |
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442 | } |
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443 | |
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444 | // RSA *rsa=RSA_generate_key(keysize,RSA_F4,_callback,NULL); |
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445 | RSA *rsa=RSA_generate_key(keysize,RSA_F4,NULL,NULL); |
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446 | if (!EVP_PKEY_assign_RSA(pk,rsa)) { |
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447 | if(debug) ERR_print_errors_fp (stderr); |
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448 | return NULL; |
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449 | } |
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450 | rsa=NULL; |
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451 | |
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452 | return pk; |
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453 | } |
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454 | |
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455 | /* Add extension using V3 code: we can set the config file as NULL |
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456 | * because we wont reference any other sections. |
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457 | */ |
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458 | static int _add_ext(X509 *cert, int nid, char *value) |
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459 | { |
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460 | X509_EXTENSION *ex; |
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461 | X509V3_CTX ctx; |
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462 | /* This sets the 'context' of the extensions. */ |
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463 | /* No configuration database */ |
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464 | X509V3_set_ctx_nodb(&ctx); |
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465 | /* Issuer and subject certs: both the target since it is self signed, |
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466 | * no request and no CRL |
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467 | */ |
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468 | X509V3_set_ctx(&ctx, cert, cert, NULL, NULL, 0); |
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469 | ex = X509V3_EXT_conf_nid(NULL, &ctx, nid, value); |
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470 | if (!ex) |
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471 | return 0; |
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472 | |
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473 | X509_add_ext(cert,ex,-1); |
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474 | X509_EXTENSION_free(ex); |
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475 | return 1; |
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476 | } |
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477 | |
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478 | |
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479 | /** |
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480 | * Generate ID certificate. |
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481 | * |
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482 | * validity is measured in seconds (as of 0.2.0) |
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483 | */ |
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484 | X509 *abac_generate_cert(EVP_PKEY *pkey, char *cn, long validity) { |
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485 | |
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486 | /* must have a privkey before generating an ID cert */ |
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487 | assert(pkey); |
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488 | X509 *cert=NULL; |
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489 | |
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490 | if((cert=X509_new()) == NULL) |
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491 | goto error; |
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492 | |
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493 | unsigned char *serial=abac_generate_serial(); |
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494 | |
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495 | if(validity == 0) validity=(long)(60*60*24*(365)); |
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496 | |
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497 | X509_set_version(cert,2); |
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498 | |
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499 | BIGNUM *bn=_make_bn_from_string(serial); |
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500 | BN_to_ASN1_INTEGER(bn, X509_get_serialNumber(cert)); |
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501 | /* this is prone to problem with very big days on 32 bit machines, |
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502 | In newer openssl, can migrate to X509_time_adj_ex */ |
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503 | X509_gmtime_adj(X509_get_notBefore(cert),0); |
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504 | X509_gmtime_adj(X509_get_notAfter(cert),validity); |
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505 | X509_set_pubkey(cert,pkey); |
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506 | |
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507 | X509_NAME *name=X509_get_subject_name(cert); |
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508 | |
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509 | if(!name) goto error; |
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510 | |
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511 | /* This function creates and adds the entry, working out the |
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512 | * correct string type and performing checks on its length. |
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513 | */ |
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514 | if(!(X509_NAME_add_entry_by_txt(name,"CN", MBSTRING_ASC, (unsigned char *)cn, -1, -1, 0))) |
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515 | goto error; // fail to add cn to cert |
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516 | |
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517 | /* Self signed, set the issuer name to be the same as the subject. */ |
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518 | if(!(X509_set_issuer_name(cert,name))) |
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519 | goto error; // fail to set issuer name on cert |
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520 | |
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521 | /* Add various extensions: standard extensions */ |
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522 | if(!(_add_ext(cert, NID_basic_constraints, "critical,CA:TRUE"))) |
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523 | goto error; // fail to set basic constraint |
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524 | if(!(_add_ext(cert, NID_key_usage, "critical,keyCertSign,cRLSign"))) |
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525 | goto error; // fail to set key usage |
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526 | if(!(_add_ext(cert, NID_subject_key_identifier, "hash"))) |
---|
527 | goto error; // fail to set subject key identifier |
---|
528 | if(!(_add_ext(cert, NID_authority_key_identifier, "keyid:always"))) |
---|
529 | goto error; // fail to set authority key identifier (self-signing) |
---|
530 | |
---|
531 | /* make sure it is signed */ |
---|
532 | if (!X509_sign(cert,pkey,EVP_sha1())) |
---|
533 | goto error; |
---|
534 | |
---|
535 | return cert; |
---|
536 | |
---|
537 | error: |
---|
538 | if(cert) X509_free(cert); |
---|
539 | if(serial) free(serial); |
---|
540 | if(bn) BN_free(bn); |
---|
541 | return NULL; |
---|
542 | } |
---|
543 | |
---|
544 | /*** not used, |
---|
545 | static char *_time_in_string(ASN1_TIME *tm) |
---|
546 | { |
---|
547 | char *ptr=NULL; |
---|
548 | BIO *mbio=BIO_new(BIO_s_mem()); |
---|
549 | ASN1_TIME_print(mbio, tm); |
---|
550 | BIO_flush(mbio); |
---|
551 | int len=BIO_number_written(mbio); |
---|
552 | ptr=(char *) malloc(sizeof(char *)*(len+1)); |
---|
553 | int ret=BIO_read(mbio, (void *)ptr, len); |
---|
554 | |
---|
555 | BIO_free_all(mbio); |
---|
556 | if(ret) |
---|
557 | return ptr; |
---|
558 | else return NULL; |
---|
559 | } |
---|
560 | ***/ |
---|
561 | |
---|
562 | |
---|
563 | /* atime->data, YYmmddHHMMSS or YYYYmmddHHMMSSZZ |
---|
564 | * V_ASN1_UTCTIME, V_ASN1_GENERALIZEDTIME |
---|
565 | */ |
---|
566 | static int _convert_time(struct tm *ttime, ASN1_TIME *atime) { |
---|
567 | assert(atime); assert(atime->data); |
---|
568 | |
---|
569 | int type=atime->type; |
---|
570 | int len=strlen((char *)atime->data); |
---|
571 | if(len==0) return 0; |
---|
572 | |
---|
573 | char *astring=strndup((char *)atime->data,len); |
---|
574 | |
---|
575 | /* setting ttime structure */ |
---|
576 | if (type == V_ASN1_UTCTIME) { |
---|
577 | strptime(astring, "%y%m%d%H%M%S", ttime); |
---|
578 | } else { |
---|
579 | if (type == V_ASN1_GENERALIZEDTIME) |
---|
580 | strptime(astring, "%Y%m%d%H%M%S", ttime); |
---|
581 | else fprintf(stderr,"ERROR,.. unknown type in ASN1_TIME struct\n"); |
---|
582 | } |
---|
583 | |
---|
584 | if(debug) { |
---|
585 | char *tstring=asctime(ttime); |
---|
586 | fprintf(stderr,"PPP final time string is %s\n",tstring); |
---|
587 | } |
---|
588 | return 1; |
---|
589 | } |
---|
590 | |
---|
591 | /* check whether the cert is still valid or not and also extract what its |
---|
592 | not_before and not_after field, 0 is okay, 1 is not */ |
---|
593 | int abac_check_validity(X509 *cert, struct tm *not_before, struct tm *not_after) { |
---|
594 | assert(cert); |
---|
595 | |
---|
596 | int valid=0; |
---|
597 | int ret=0; |
---|
598 | memset(not_before, 0, sizeof(struct tm)); |
---|
599 | memset(not_after, 0, sizeof(struct tm)); |
---|
600 | ASN1_TIME *notAfter= X509_get_notAfter(cert); |
---|
601 | ASN1_TIME *notBefore=X509_get_notBefore(cert); |
---|
602 | |
---|
603 | ret=_convert_time(not_before, notBefore); |
---|
604 | if(ret==0) return 1; |
---|
605 | ret=_convert_time(not_after, notAfter); |
---|
606 | if(ret==0) return 1; |
---|
607 | |
---|
608 | if((X509_cmp_current_time(notBefore) >=0) || |
---|
609 | (X509_cmp_current_time(notAfter) <=0) ) |
---|
610 | valid=1; |
---|
611 | |
---|
612 | if(valid) return 0; |
---|
613 | else return 1; |
---|
614 | } |
---|
615 | |
---|
616 | /* check if cert is still valid at current time, 1 for yes, 0 for no*/ |
---|
617 | int abac_still_valid(X509 *cert) |
---|
618 | { |
---|
619 | ASN1_TIME *notAfter= X509_get_notAfter(cert); |
---|
620 | ASN1_TIME *notBefore=X509_get_notBefore(cert); |
---|
621 | if(0) { |
---|
622 | fprintf(stderr,"((X509_cmp_current_time(notBefore) is %d\n", |
---|
623 | X509_cmp_current_time(notBefore)); |
---|
624 | fprintf(stderr,"((X509_cmp_current_time(notAfter) is %d\n", |
---|
625 | X509_cmp_current_time(notAfter)); |
---|
626 | } |
---|
627 | if((X509_cmp_current_time(notBefore) >=0) || |
---|
628 | (X509_cmp_current_time(notAfter) <=0) ) |
---|
629 | return 0; |
---|
630 | return 1; |
---|
631 | } |
---|
632 | |
---|
633 | char *abac_get_cn(X509 *cert) |
---|
634 | { |
---|
635 | X509_NAME *nptr=X509_get_subject_name (cert); |
---|
636 | int pos=X509_NAME_get_index_by_NID(nptr, NID_commonName,-1); |
---|
637 | X509_NAME_ENTRY *ent=X509_NAME_get_entry(nptr,pos); |
---|
638 | ASN1_STRING *adata=X509_NAME_ENTRY_get_data(ent); |
---|
639 | unsigned char *val=ASN1_STRING_data(adata); |
---|
640 | if(debug) fprintf(stderr," cn:(%zu)(%s)\n", strlen((char *)val), val); |
---|
641 | return (char *) val; |
---|
642 | } |
---|
643 | |
---|
644 | char *abac_get_serial(X509 *cert) |
---|
645 | { |
---|
646 | char *ret=NULL; |
---|
647 | ASN1_INTEGER *num=X509_get_serialNumber(cert); |
---|
648 | BIGNUM *bnser=ASN1_INTEGER_to_BN(num,NULL); |
---|
649 | int n=BN_num_bytes(bnser); |
---|
650 | unsigned char buf[n]; |
---|
651 | int b=BN_bn2bin(bnser,buf); |
---|
652 | if(debug) { |
---|
653 | fprintf(stderr," extract serial number:->(%d)",b); |
---|
654 | BN_print_fp(stderr,bnser); |
---|
655 | } |
---|
656 | if(n) |
---|
657 | ret=strndup((char *)buf,n); |
---|
658 | return ret; |
---|
659 | } |
---|
660 | |
---|
661 | char *abac_get_subject(X509 *cert) |
---|
662 | { |
---|
663 | char *ptr=X509_NAME_oneline(X509_get_subject_name(cert),0,0); |
---|
664 | return ptr; |
---|
665 | } |
---|
666 | |
---|
667 | char *abac_get_issuer(X509 *cert) |
---|
668 | { |
---|
669 | char *ptr=X509_NAME_oneline(X509_get_issuer_name(cert),0,0); |
---|
670 | return ptr; |
---|
671 | } |
---|
672 | |
---|
673 | // success: malloc'd calculated SHA1 of the key (as per RFC3280) |
---|
674 | // fail: NULL |
---|
675 | unsigned char *abac_get_keyid(X509 *cert) |
---|
676 | { |
---|
677 | char digest[SHA_DIGEST_LENGTH]; /* SSL computed key digest */ |
---|
678 | /* ASCII (UTF-8 compatible) text for the digest */ |
---|
679 | unsigned char *sha=(unsigned char *) malloc(2*SHA_DIGEST_LENGTH+1); |
---|
680 | int i; /* Scratch */ |
---|
681 | |
---|
682 | if ( !sha) return NULL; |
---|
683 | |
---|
684 | if ( !X509_pubkey_digest(cert, EVP_sha1(), digest, NULL)) { |
---|
685 | free(sha); |
---|
686 | return NULL; |
---|
687 | } |
---|
688 | |
---|
689 | /* Translate to ASCII */ |
---|
690 | for ( i = 0; i < SHA_DIGEST_LENGTH; i++) |
---|
691 | snprintf((char *) sha+2*i, 3, "%02x", digest[i] & 0xff); |
---|
692 | sha[2*SHA_DIGEST_LENGTH] = '\0'; |
---|
693 | |
---|
694 | if(debug) fprintf(stderr,"SHA1 -> %s\n",sha); |
---|
695 | return sha; |
---|
696 | } |
---|