Mercurial > trustbridge

annotate common/listutil.c @ 1331:8897c90b8166

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(issue108) Remove generate_cppcheck and cppcheck target This did not work correctly. It is better just to manually execute cppcheck on the files as it gives you more control over the options.
author Andre Heinecke <andre.heinecke@intevation.de>
date Wed, 15 Oct 2014 13:24:59 +0200
parents 3cd8dd706aaa
children 8d27c6d226cd
rev   line source
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1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details.
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7 */
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8 #include "listutil.h"
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9
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10 #include <stdio.h>
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11 #include <stdlib.h>
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12 #include <errno.h>
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13 #include <fcntl.h>
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14 #include <unistd.h>
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15 #include <sys/types.h>
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16 #include <sys/stat.h>
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17 #include <string.h>
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18
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19 #ifdef WIN32
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20 #include <share.h>
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21 #endif
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22
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23 #include "strhelp.h"
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24 #include "logging.h"
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25 #include "portpath.h"
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26
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27 #ifdef RELEASE_BUILD
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28 #include "pubkey-release.h"
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29 #else
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30 #include "pubkey-test.h"
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31 #endif
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32
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33 #ifndef __clang__
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34 #pragma GCC diagnostic ignored "-Wconversion"
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35 #endif
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36 /* Polarssl mh.h contains a conversion which gcc warns about */
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37 #include <polarssl/pk.h>
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38 #include <polarssl/base64.h>
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39 #include <polarssl/sha256.h>
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40 #ifndef __clang__
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41 #pragma GCC diagnostic pop
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42 #endif
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43
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44 #define MAX_FILESIZE (MAX_LINE_LENGTH * MAX_LINES)
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45
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46 #define READ_FILE_UNREADABLE -1
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47 #define READ_FILE_TOO_LARGE -2
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48 #define READ_FILE_NO_MEMORY -3
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49 #define READ_FILE_READ_FAILED -4
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50 #define READ_FILE_INVALID_CALL -5
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51 int
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52 read_file(const char *file_name, char **data, size_t *size,
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53 const size_t max_size, FILE **fptr)
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54 {
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55 FILE *f;
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56 long file_size;
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57
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58 if (!file_name || !data || !size || !max_size)
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59 {
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60 return READ_FILE_INVALID_CALL;
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61 }
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62
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63 f = port_fopen_rb(file_name, true);
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64 if (f == NULL)
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65 return READ_FILE_UNREADABLE;
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66
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67 fseek(f, 0, SEEK_END);
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68 file_size = ftell(f);
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69 if (file_size <= 0)
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70 {
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71 fclose(f);
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72 return READ_FILE_UNREADABLE;
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73 }
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74
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75 fseek(f, 0, SEEK_SET);
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76
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77 if (file_size + 1 == 0)
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78 {
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79 fclose(f);
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80 return READ_FILE_TOO_LARGE;
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81 }
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82 *size = (size_t) file_size;
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83
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84 if (*size > max_size)
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85 {
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86 fclose(f);
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87 return READ_FILE_TOO_LARGE;
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88 }
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89
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90 *data = (char *) malloc( *size + 1 );
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91 if (*data == NULL)
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92 {
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93 fclose(f);
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94 return READ_FILE_NO_MEMORY;
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95 }
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96
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97 if (fread(*data, 1, *size, f) != *size)
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98 {
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99 free(*data);
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100 fclose(f);
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101 return READ_FILE_READ_FAILED;
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102 }
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103
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104 if (fptr)
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105 {
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106 *fptr = f;
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107 }
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108 else
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109 {
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110 fclose(f);
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111 }
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112
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113 (*data)[*size] = '\0';
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114
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115 return 0;
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116 }
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117
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118 int verify_list(const char *data, const size_t size)
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119 {
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120 int ret = -1;
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121 pk_context pub_key_ctx;
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122 char *p;
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123
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124 /* Modulus / 8 are the necessary bytes. */
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125 #ifndef TRUSTBRIDGE_RSA_KEY_SIZE
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126 # error "Key size undefined"
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127 #endif
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128 const size_t sig_b64_size = TRUSTBRIDGE_RSA_KEY_SIZE / 8 * 4 / 3;
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129 size_t sig_size = TRUSTBRIDGE_RSA_KEY_SIZE / 8;
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130
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131 char signature_b64[sig_b64_size + 1];
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132 unsigned char signature[sig_size];
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133 /* Hash algroithm is sha256 */
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134 unsigned char hash[32];
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135
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136 if (!data || !size)
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137 {
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138 return -1;
93
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139 }
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140
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diff changeset
141 /* Fetch the signature from the first line od data */
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
142 p = strchr(data, '\r');
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diff changeset
143 if (p == 0 || (unsigned int)(p - (data + 2)) != sig_b64_size)
698b6a9bd75e Fix coding style for C code
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diff changeset
144 {
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diff changeset
145 /* printf("Invalid data. Signature might be too long.\n"); */
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diff changeset
146 return -1;
31
37fc66967517 Implement signature verification wiht polarssl
Andre Heinecke <aheinecke@intevation.de>
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diff changeset
147 }
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diff changeset
148 strncpy(signature_b64, data + 2, sig_b64_size);
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
149 signature_b64[sig_b64_size] = '\0';
31
37fc66967517 Implement signature verification wiht polarssl
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diff changeset
150
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
151 ret = base64_decode(signature, &sig_size,
698b6a9bd75e Fix coding style for C code
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diff changeset
152 (unsigned char *)signature_b64, sig_b64_size);
31
37fc66967517 Implement signature verification wiht polarssl
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diff changeset
153
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
154 if (ret != 0 || sig_size != TRUSTBRIDGE_RSA_KEY_SIZE / 8)
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
155 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
156 /* printf("failed to decode signature\n"); */
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diff changeset
157 return -1;
31
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Andre Heinecke <aheinecke@intevation.de>
parents: 28
diff changeset
158 }
37fc66967517 Implement signature verification wiht polarssl
Andre Heinecke <aheinecke@intevation.de>
parents: 28
diff changeset
159
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diff changeset
160 /* Hash is calculated over the data without the first line.
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diff changeset
161 * linebreaks are \r\n so the first char of the new line is
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
162 * p+2 */
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Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
163 p += 2;
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Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
164 /* Size of the data to hash is the size - signature line
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
165 * signature line is sig_b64_size - "S:" and - "\r\n" so -4*/
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
166 sha256((unsigned char *)p, size - sig_b64_size - 4, hash, 0);
28
e783fd99a9eb Add public key parsing
Andre Heinecke <aheinecke@intevation.de>
parents: 22
diff changeset
167
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diff changeset
168 pk_init(&pub_key_ctx);
28
e783fd99a9eb Add public key parsing
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parents: 22
diff changeset
169
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diff changeset
170 ret = pk_parse_public_key(&pub_key_ctx, public_key_pem,
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
171 public_key_pem_size);
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
172 if (ret != 0)
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
173 {
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
174 ERRORPRINTF ("pk_parse_public_key failed with -0x%04x\n\n", -ret);
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175 pk_free(&pub_key_ctx);
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
176 return ret;
28
e783fd99a9eb Add public key parsing
Andre Heinecke <aheinecke@intevation.de>
parents: 22
diff changeset
177 }
e783fd99a9eb Add public key parsing
Andre Heinecke <aheinecke@intevation.de>
parents: 22
diff changeset
178
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
179 ret = pk_verify(&pub_key_ctx, POLARSSL_MD_SHA256, hash, 0,
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
180 signature, sig_size);
31
37fc66967517 Implement signature verification wiht polarssl
Andre Heinecke <aheinecke@intevation.de>
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diff changeset
181
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diff changeset
182 if (ret != 0)
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Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
183 {
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
184 ERRORPRINTF ("pk_verify failed with -0x%04x\n\n", -ret);
31
37fc66967517 Implement signature verification wiht polarssl
Andre Heinecke <aheinecke@intevation.de>
parents: 28
diff changeset
185 }
905
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
186 pk_free(&pub_key_ctx);
31
37fc66967517 Implement signature verification wiht polarssl
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diff changeset
187
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diff changeset
188 return ret;
28
e783fd99a9eb Add public key parsing
Andre Heinecke <aheinecke@intevation.de>
parents: 22
diff changeset
189 }
e783fd99a9eb Add public key parsing
Andre Heinecke <aheinecke@intevation.de>
parents: 22
diff changeset
190
e783fd99a9eb Add public key parsing
Andre Heinecke <aheinecke@intevation.de>
parents: 22
diff changeset
191 list_status_t read_and_verify_list(const char *file_name, char **data,
e783fd99a9eb Add public key parsing
Andre Heinecke <aheinecke@intevation.de>
parents: 22
diff changeset
192 size_t *size)
e783fd99a9eb Add public key parsing
Andre Heinecke <aheinecke@intevation.de>
parents: 22
diff changeset
193 {
905
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diff changeset
194 list_status_t retval = UnknownError;
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
195 *data = NULL;
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
196 *size = 0;
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
197 int ret = 0;
4
9849250f50f2 Start implementation of certificatelist parser
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
198
1081
edbf5e5e88f4 (issue118) Extend verify_binary to carry an open file
Andre Heinecke <andre.heinecke@intevation.de>
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199 ret = read_file(file_name, data, size, MAX_FILESIZE, NULL);
905
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
200
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
201 /* printf ("Ret: %i \n", ret); */
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
202 if (ret != 0)
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
203 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
204 if (ret == READ_FILE_TOO_LARGE)
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
205 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
206 return TooLarge;
31
37fc66967517 Implement signature verification wiht polarssl
Andre Heinecke <aheinecke@intevation.de>
parents: 28
diff changeset
207 }
905
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
208 if (ret == READ_FILE_UNREADABLE)
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
209 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
210 return SeekFailed;
31
37fc66967517 Implement signature verification wiht polarssl
Andre Heinecke <aheinecke@intevation.de>
parents: 28
diff changeset
211 }
905
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Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
212 if (ret == READ_FILE_READ_FAILED)
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
213 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
214 return ReadFailed;
31
37fc66967517 Implement signature verification wiht polarssl
Andre Heinecke <aheinecke@intevation.de>
parents: 28
diff changeset
215 }
905
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
216 return UnknownError;
4
9849250f50f2 Start implementation of certificatelist parser
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
217 }
9849250f50f2 Start implementation of certificatelist parser
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
218
905
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
219 if (!*data || !*size)
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
220 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
221 /* File is probably empty */
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
222 return UnknownError;
4
9849250f50f2 Start implementation of certificatelist parser
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
223 }
9849250f50f2 Start implementation of certificatelist parser
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
224
905
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
225 if (**data != 'S')
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
226 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
227 retval = InvalidFormat;
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
228 }
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
229 else
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
230 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
231 ret = verify_list (*data, *size);
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
232 if (ret == 0)
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
233 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
234 /* Hooray */
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
235 return Valid;
31
37fc66967517 Implement signature verification wiht polarssl
Andre Heinecke <aheinecke@intevation.de>
parents: 28
diff changeset
236 }
905
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Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
237 if (ret == -1)
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
238 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
239 /* our error */
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
240 retval = InvalidFormat;
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
241 }
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
242 else
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
243 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
244 retval = InvalidSignature;
31
37fc66967517 Implement signature verification wiht polarssl
Andre Heinecke <aheinecke@intevation.de>
parents: 28
diff changeset
245 }
37fc66967517 Implement signature verification wiht polarssl
Andre Heinecke <aheinecke@intevation.de>
parents: 28
diff changeset
246 }
9
2ad9a96518e3 Actually parse all elements in the list
Andre Heinecke <aheinecke@intevation.de>
parents: 7
diff changeset
247
905
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
248 if (retval != Valid && *data)
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
249 {
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
250 free(*data);
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
251 *data = NULL;
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
parents: 770
diff changeset
252 *size = 0;
4
9849250f50f2 Start implementation of certificatelist parser
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
253 }
905
698b6a9bd75e Fix coding style for C code
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
254 return retval;
4
9849250f50f2 Start implementation of certificatelist parser
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
255 }
9849250f50f2 Start implementation of certificatelist parser
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
256
286
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
257 char **
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
258 get_certs_from_list (char *data, const size_t size)
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
259 {
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
260 char *cur = data;
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
261 char **retval = NULL;
68
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 66
diff changeset
262
286
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
263 if (!data || !size)
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
264 {
626
f595fcbe3e76 Replace "normal printfs" with DEBUG / ERROR printf macros
Andre Heinecke <andre.heinecke@intevation.de>
parents: 404
diff changeset
265 ERRORPRINTF ("Invalid call to get_certs_to_remove \n");
286
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
266 return NULL;
68
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 66
diff changeset
267 }
286
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
268
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
269 while (cur)
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
270 {
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
271 char *next = strchr(cur, '\n');
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
272 if (strlen(cur) > 3 && (cur[0] == 'I' || cur[0] == 'R') &&
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
273 next - cur > 4)
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
274 {
292
57867a523dcf Do not cut off the last character of the line. (next-cur does not include \n)
Andre Heinecke <aheinecke@intevation.de>
parents: 286
diff changeset
275 size_t len = (size_t) (next - cur - 3);
286
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
276 /* Remove I: or R: at the beginning and \r\n at the end */
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
277 strv_append(&retval, cur + 2, len);
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
278 }
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
279 cur = next ? (next + 1) : NULL;
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
280 }
881ce5126f07 Add helper function to get all certificates in a list
Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
281 return retval;
68
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 66
diff changeset
282 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 66
diff changeset
283
http://wald.intevation.org/projects/trustbridge/