Mercurial > ~mikael > mcabber > hg
annotate mcabber/mcabber/pgp.c @ 2233:90c25a29fb35
New option: 'gpg_path'
The path to the gpg binary can now be specified in order to force the
use of GnuPG version 1 on systems which have both versions installed.
author | Holger Weiß <holger@zedat.fu-berlin.de> |
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date | Sat, 21 Nov 2015 17:44:55 +0100 |
parents | 778280b01bcb |
children | 232c26383fc4 |
rev | line source |
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1 /* |
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2 * pgp.c -- PGP utility functions |
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3 * |
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4 * Copyright (C) 2006-2015 Mikael Berthe <mikael@lilotux.net> |
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5 * Some parts inspired by centericq (impgp.cc) |
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6 * |
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7 * This program is free software; you can redistribute it and/or modify |
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8 * it under the terms of the GNU General Public License as published by |
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9 * the Free Software Foundation; either version 2 of the License, or (at |
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10 * your option) any later version. |
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11 * |
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12 * This program is distributed in the hope that it will be useful, but |
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU General Public License |
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18 * along with this program; if not, write to the Free Software |
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19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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20 * USA |
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21 */ |
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22 |
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23 #include <config.h> |
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24 |
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25 #ifdef HAVE_GPGME |
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26 |
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27 #include <stdlib.h> |
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28 #include <string.h> |
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29 #include <unistd.h> |
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30 #include <locale.h> |
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31 #include <sys/mman.h> |
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32 #include <glib.h> |
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33 |
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34 #include "pgp.h" |
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35 #include "settings.h" |
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36 #include "logprint.h" |
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37 |
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38 #define MIN_GPGME_VERSION "1.1.0" |
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39 |
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40 static struct gpg_struct |
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41 { |
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42 int enabled; |
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43 int version1; |
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44 char *private_key; |
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45 char *passphrase; |
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46 } gpg; |
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47 |
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48 |
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49 // gpg_init(priv_key, passphrase) |
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50 // Initialize the GPG sub-systems. This function must be invoked early. |
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51 // Note: priv_key & passphrase are optional, they can be set later. |
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52 // This function returns 0 if gpgme is available and initialized; |
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53 // if not it returns the gpgme error code. |
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54 int gpg_init(const char *priv_key, const char *passphrase) |
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55 { |
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56 gpgme_error_t err; |
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57 |
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58 gpgme_ctx_t ctx; |
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59 gpgme_engine_info_t info; |
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60 const char *gpg_path; |
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61 |
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62 // Check for version and OpenPGP protocol support. |
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63 if (!gpgme_check_version(MIN_GPGME_VERSION)) { |
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64 scr_LogPrint(LPRINT_LOGNORM, |
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65 "GPGME initialization error: Bad library version"); |
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66 return -1; |
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67 } |
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68 |
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69 err = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP); |
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70 if (err) { |
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71 scr_LogPrint(LPRINT_LOGNORM|LPRINT_NOTUTF8, |
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72 "GPGME initialization error: %s", gpgme_strerror(err)); |
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73 return err; |
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74 } |
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75 |
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76 // Set the locale information. |
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77 gpgme_set_locale(NULL, LC_CTYPE, setlocale(LC_CTYPE, NULL)); |
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78 gpgme_set_locale(NULL, LC_MESSAGES, setlocale(LC_MESSAGES, NULL)); |
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79 |
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80 // The path to the gpg binary can be specified in order to force |
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81 // version 1, for example. |
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82 gpg_path = settings_opt_get("gpg_path"); |
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83 if (gpg_path) { |
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84 err = gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP, gpg_path, NULL); |
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85 if (err) return -1; |
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86 } |
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87 |
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88 // Store private data. |
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89 gpg_set_private_key(priv_key); |
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90 gpg_set_passphrase(passphrase); |
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91 |
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92 err = gpgme_new(&ctx); |
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93 if (err) return -1; |
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94 |
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95 // Check OpenPGP engine version; with version 2+ the agent is mandatory |
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96 // and we do not manage the passphrase. |
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97 gpgme_set_protocol(ctx, GPGME_PROTOCOL_OpenPGP); |
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98 if (err) return -1; |
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99 |
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100 err = gpgme_get_engine_info (&info); |
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101 if (!err) { |
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102 while (info && info->protocol != gpgme_get_protocol (ctx)) |
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103 info = info->next; |
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104 |
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105 if (info && info->version) { |
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106 if (!strncmp(info->version, "1.", 2)) |
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107 gpg.version1 = TRUE; |
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108 scr_log_print(LPRINT_DEBUG, "GPGME: Engine version is '%s'.", |
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109 info->version); |
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110 } |
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111 } |
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112 |
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114 gpg.enabled = 1; |
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115 return 0; |
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116 } |
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117 |
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118 // gpg_is_version1() |
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119 // Return TRUE if the GnuPG OpenPGP engine version is 1.x |
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120 int gpg_is_version1(void) |
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121 { |
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122 return gpg.version1; |
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123 } |
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124 |
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125 // gpg_terminate() |
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126 // Destroy data and free memory. |
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127 void gpg_terminate(void) |
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128 { |
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129 gpg.enabled = 0; |
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130 gpg_set_passphrase(NULL); |
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131 gpg_set_private_key(NULL); |
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132 } |
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133 |
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134 // gpg_set_passphrase(passphrase) |
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135 // Set the current passphrase (use NULL to erase it). |
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136 void gpg_set_passphrase(const char *passphrase) |
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137 { |
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138 // Remove current passphrase |
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139 if (gpg.passphrase) { |
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140 ssize_t len = strlen(gpg.passphrase); |
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141 memset(gpg.passphrase, 0, len); |
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142 munlock(gpg.passphrase, len); |
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143 g_free(gpg.passphrase); |
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144 } |
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145 if (passphrase) { |
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146 gpg.passphrase = g_strdup(passphrase); |
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147 mlock(gpg.passphrase, strlen(gpg.passphrase)); |
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148 } else { |
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149 gpg.passphrase = NULL; |
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150 } |
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151 } |
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152 |
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153 // gpg_set_private_key(keyid) |
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154 // Set the current private key id (use NULL to unset it). |
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155 void gpg_set_private_key(const char *priv_keyid) |
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156 { |
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157 g_free(gpg.private_key); |
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158 if (priv_keyid) |
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159 gpg.private_key = g_strdup(priv_keyid); |
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160 else |
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161 gpg.private_key = NULL; |
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162 } |
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163 |
2188
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164 // gpg_get_private_key_id() |
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165 // Return the current private key id (static string). |
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166 const char *gpg_get_private_key_id(void) |
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167 { |
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168 return gpg.private_key; |
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169 } |
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170 |
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171 // strip_header_footer(data) |
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172 // Remove PGP header & footer from data. |
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173 // Return a new string, or NULL. |
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174 // The string must be freed by the caller with g_free() when no longer needed. |
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175 static char *strip_header_footer(const char *data) |
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176 { |
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177 char *p, *q; |
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178 |
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179 if (!data) |
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180 return NULL; |
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181 |
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182 // p: beginning of real data |
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183 // q: end of real data |
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184 |
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185 // Strip header (to the first empty line) |
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186 p = strstr(data, "\n\n"); |
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187 if (!p) |
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188 return g_strdup(data); |
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189 |
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190 // Strip footer |
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191 // We want to remove the last lines, until the line beginning with a '-' |
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192 p += 2; |
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193 for (q = p ; *q; q++) ; |
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194 // (q is at the end of data now) |
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195 for (q--; q > p && (*q != '\n' || *(q+1) != '-'); q--) ; |
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196 |
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197 if (q <= p) |
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198 return NULL; // Shouldn't happen... |
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199 |
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200 return g_strndup(p, q-p); |
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201 } |
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202 |
1598 | 203 // GCC ignores casts to void, thus we need to hack around that |
204 static inline void ignore(void*x) {} | |
205 | |
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206 // passphrase_cb() |
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207 // GPGME passphrase callback function. |
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208 static gpgme_error_t passphrase_cb(void *hook, const char *uid_hint, |
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209 const char *passphrase_info, int prev_was_bad, int fd) |
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210 { |
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211 ssize_t len; |
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212 |
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213 // Abort if we do not have the password. |
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214 if (!gpg.passphrase) { |
1598 | 215 ignore((void*)write(fd, "\n", 1)); // We have an error anyway, thus it does |
216 // not matter if we fail again. | |
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217 return gpg_error(GPG_ERR_CANCELED); |
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218 } |
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219 |
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220 // Write the passphrase to the file descriptor. |
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221 len = strlen(gpg.passphrase); |
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222 if (write(fd, gpg.passphrase, len) != len) |
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223 return gpg_error(GPG_ERR_CANCELED); |
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224 if (write(fd, "\n", 1) != 1) |
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225 return gpg_error(GPG_ERR_CANCELED); |
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226 |
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227 return 0; // Success |
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228 } |
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229 |
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230 // gpg_verify(gpg_data, text, *sigsum) |
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231 // Verify that gpg_data is a correct signature for text. |
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232 // Return the key id (or fingerprint), and set *sigsum to |
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233 // the gpgme signature summary value. |
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234 // The returned string must be freed with g_free() after use. |
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235 char *gpg_verify(const char *gpg_data, const char *text, |
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236 gpgme_sigsum_t *sigsum) |
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237 { |
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238 gpgme_ctx_t ctx; |
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239 gpgme_data_t data_sign, data_text; |
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240 char *data; |
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241 char *verified_key = NULL; |
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242 gpgme_key_t key; |
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243 gpgme_error_t err; |
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244 const char prefix[] = "-----BEGIN PGP SIGNATURE-----\n\n"; |
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245 const char suffix[] = "\n-----END PGP SIGNATURE-----\n"; |
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246 |
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247 // Reset the summary. |
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248 *sigsum = 0; |
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249 |
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250 if (!gpg.enabled) |
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251 return NULL; |
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252 |
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253 err = gpgme_new(&ctx); |
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254 if (err) { |
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255 scr_LogPrint(LPRINT_LOGNORM|LPRINT_NOTUTF8, |
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256 "GPGME error: %s", gpgme_strerror(err)); |
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257 return NULL; |
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258 } |
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259 |
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260 gpgme_set_protocol(ctx, GPGME_PROTOCOL_OpenPGP); |
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261 |
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262 // Surround the given data with the prefix & suffix |
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263 data = g_new(char, sizeof(prefix) + sizeof(suffix) + strlen(gpg_data)); |
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264 strcpy(data, prefix); |
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265 strcat(data, gpg_data); |
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266 strcat(data, suffix); |
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267 |
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268 err = gpgme_data_new_from_mem(&data_sign, data, strlen(data), 0); |
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269 if (!err) { |
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270 err = gpgme_data_new_from_mem(&data_text, text, strlen(text), 0); |
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271 if (!err) { |
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272 err = gpgme_op_verify(ctx, data_sign, data_text, 0); |
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273 if (!err) { |
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274 gpgme_verify_result_t vr = gpgme_op_verify_result(ctx); |
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275 if (vr && vr->signatures) { |
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276 gpgme_signature_t s = NULL; |
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277 // check all signatures and stop if the first could be verified |
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278 for (s = vr->signatures; s && !verified_key; s = s->next) { |
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279 // Found the fingerprint. Let's try to get the key id. |
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280 if (NULL != s->fpr) { |
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281 if (!gpgme_get_key(ctx, s->fpr, &key, 0)) { |
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282 if (key) { |
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283 verified_key = g_strdup(key->subkeys->keyid); |
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284 gpgme_key_release(key); |
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285 } |
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286 } |
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287 } |
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288 *sigsum = s->summary; |
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289 // For some reason summary could be 0 when status is 0 too, |
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290 // which means the signature is valid... |
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291 if ((!*sigsum) && (!s->status)) |
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292 *sigsum = GPGME_SIGSUM_GREEN; |
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293 } |
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294 } |
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295 } |
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296 gpgme_data_release(data_text); |
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297 } |
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298 gpgme_data_release(data_sign); |
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299 } |
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300 if (err) |
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301 scr_LogPrint(LPRINT_LOGNORM|LPRINT_NOTUTF8, |
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302 "GPGME verification error: %s", gpgme_strerror(err)); |
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303 gpgme_release(ctx); |
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304 g_free(data); |
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305 return verified_key; |
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306 } |
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307 |
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308 // gpg_sign(gpg_data) |
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309 // Return a signature of gpg_data (or NULL). |
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310 // The returned string must be freed with g_free() after use. |
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311 char *gpg_sign(const char *gpg_data) |
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312 { |
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313 gpgme_ctx_t ctx; |
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314 gpgme_data_t in, out; |
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315 char *signed_data = NULL; |
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316 size_t nread; |
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317 gpgme_key_t key; |
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318 gpgme_error_t err; |
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319 |
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320 if (!gpg.enabled || !gpg.private_key) |
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321 return NULL; |
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322 |
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323 err = gpgme_new(&ctx); |
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324 if (err) { |
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325 scr_LogPrint(LPRINT_LOGNORM|LPRINT_NOTUTF8, |
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326 "GPGME error: %s", gpgme_strerror(err)); |
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327 return NULL; |
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328 } |
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329 |
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330 gpgme_set_protocol(ctx, GPGME_PROTOCOL_OpenPGP); |
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331 gpgme_set_textmode(ctx, 0); |
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332 gpgme_set_armor(ctx, 1); |
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333 |
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334 if (gpg.version1) { |
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335 // GPG_AGENT_INFO isn't used by GnuPG version 2+ |
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336 char *p = getenv("GPG_AGENT_INFO"); |
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337 if (!(p && strchr(p, ':'))) |
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338 gpgme_set_passphrase_cb(ctx, passphrase_cb, 0); |
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339 } |
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340 |
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341 err = gpgme_get_key(ctx, gpg.private_key, &key, 1); |
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265e1d873d3e
PGP: Improve checks for missing keys
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diff
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342 if (err || !key) { |
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343 scr_LogPrint(LPRINT_LOGNORM, "GPGME error: private key not found"); |
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344 gpgme_release(ctx); |
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345 return NULL; |
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346 } |
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347 |
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348 gpgme_signers_clear(ctx); |
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349 gpgme_signers_add(ctx, key); |
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350 gpgme_key_release(key); |
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351 err = gpgme_data_new_from_mem(&in, gpg_data, strlen(gpg_data), 0); |
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352 if (!err) { |
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353 err = gpgme_data_new(&out); |
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|
354 if (!err) { |
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355 err = gpgme_op_sign(ctx, in, out, GPGME_SIG_MODE_DETACH); |
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diff
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356 if (err) { |
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|
357 gpgme_data_release(out); |
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358 } else { |
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359 signed_data = gpgme_data_release_and_get_mem(out, &nread); |
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|
360 if (signed_data) { |
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361 // We need to add a trailing NULL |
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362 char *dd = g_strndup(signed_data, nread); |
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|
363 free(signed_data); |
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|
364 signed_data = strip_header_footer(dd); |
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|
365 g_free(dd); |
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|
366 } |
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|
367 } |
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368 } |
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|
369 gpgme_data_release(in); |
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|
370 } |
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371 if (err && err != GPG_ERR_CANCELED) |
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|
372 scr_LogPrint(LPRINT_LOGNORM|LPRINT_NOTUTF8, |
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diff
changeset
|
373 "GPGME signature error: %s", gpgme_strerror(err)); |
1041
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374 gpgme_release(ctx); |
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375 return signed_data; |
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|
376 } |
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|
377 |
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378 // gpg_decrypt(gpg_data) |
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379 // Return decrypted gpg_data (or NULL). |
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380 // The returned string must be freed with g_free() after use. |
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381 char *gpg_decrypt(const char *gpg_data) |
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|
382 { |
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|
383 gpgme_ctx_t ctx; |
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384 gpgme_data_t in, out; |
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385 char *data; |
1041
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|
386 char *decrypted_data = NULL; |
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|
387 size_t nread; |
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|
388 gpgme_error_t err; |
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|
389 const char prefix[] = "-----BEGIN PGP MESSAGE-----\n\n"; |
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390 const char suffix[] = "\n-----END PGP MESSAGE-----\n"; |
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|
391 |
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|
392 if (!gpg.enabled) |
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393 return NULL; |
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|
394 |
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|
395 err = gpgme_new(&ctx); |
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|
396 if (err) { |
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397 scr_LogPrint(LPRINT_LOGNORM|LPRINT_NOTUTF8, |
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398 "GPGME error: %s", gpgme_strerror(err)); |
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|
399 return NULL; |
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|
400 } |
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|
401 |
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402 gpgme_set_protocol(ctx, GPGME_PROTOCOL_OpenPGP); |
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403 |
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404 if (gpg.version1) { |
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405 // GPG_AGENT_INFO isn't used by GnuPG version 2+ |
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406 char *p = getenv("GPG_AGENT_INFO"); |
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407 if (!(p && strchr(p, ':'))) |
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408 gpgme_set_passphrase_cb(ctx, passphrase_cb, 0); |
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409 } |
1041
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|
410 |
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|
411 // Surround the given data with the prefix & suffix |
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412 data = g_new(char, sizeof(prefix) + sizeof(suffix) + strlen(gpg_data)); |
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|
413 strcpy(data, prefix); |
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|
414 strcat(data, gpg_data); |
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|
415 strcat(data, suffix); |
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changeset
|
416 |
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417 err = gpgme_data_new_from_mem(&in, data, strlen(data), 0); |
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changeset
|
418 if (!err) { |
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|
419 err = gpgme_data_new(&out); |
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changeset
|
420 if (!err) { |
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changeset
|
421 err = gpgme_op_decrypt(ctx, in, out); |
2202
ff18feb75a6d
PGP: Add a trailing NULL after a message is PGP-encrypted
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2200
diff
changeset
|
422 if (err) { |
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PGP: Add a trailing NULL after a message is PGP-encrypted
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|
423 gpgme_data_release(out); |
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PGP: Add a trailing NULL after a message is PGP-encrypted
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|
424 } else { |
1041
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425 decrypted_data = gpgme_data_release_and_get_mem(out, &nread); |
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diff
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|
426 if (decrypted_data) { |
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changeset
|
427 // We need to add a trailing NULL |
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|
428 char *dd = g_strndup(decrypted_data, nread); |
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|
429 free(decrypted_data); |
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|
430 decrypted_data = dd; |
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changeset
|
431 } |
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changeset
|
432 } |
d4b97a2423eb
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|
433 } |
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diff
changeset
|
434 gpgme_data_release(in); |
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Introduce PGP utility functions
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diff
changeset
|
435 } |
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changeset
|
436 if (err && err != GPG_ERR_CANCELED) |
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diff
changeset
|
437 scr_LogPrint(LPRINT_LOGNORM|LPRINT_NOTUTF8, |
1047
0dc104d51dce
PGP: Better error messages
Mikael Berthe <mikael@lilotux.net>
parents:
1041
diff
changeset
|
438 "GPGME decryption error: %s", gpgme_strerror(err)); |
1041
d4b97a2423eb
Introduce PGP utility functions
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parents:
diff
changeset
|
439 gpgme_release(ctx); |
d4b97a2423eb
Introduce PGP utility functions
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changeset
|
440 g_free(data); |
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diff
changeset
|
441 return decrypted_data; |
d4b97a2423eb
Introduce PGP utility functions
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diff
changeset
|
442 } |
d4b97a2423eb
Introduce PGP utility functions
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parents:
diff
changeset
|
443 |
2187
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
444 // gpg_encrypt(gpg_data, keyids[], n) |
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PGP: Change gpg_encrypt() so that several encryption keys can be used
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1811
diff
changeset
|
445 // Return encrypted gpg_data with the n keys from the keyids array (or NULL). |
1041
d4b97a2423eb
Introduce PGP utility functions
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parents:
diff
changeset
|
446 // The returned string must be freed with g_free() after use. |
2187
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
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parents:
1811
diff
changeset
|
447 char *gpg_encrypt(const char *gpg_data, const char *keyids[], size_t nkeys) |
1041
d4b97a2423eb
Introduce PGP utility functions
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diff
changeset
|
448 { |
d4b97a2423eb
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changeset
|
449 gpgme_ctx_t ctx; |
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diff
changeset
|
450 gpgme_data_t in, out; |
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Introduce PGP utility functions
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parents:
diff
changeset
|
451 char *encrypted_data = NULL, *edata; |
d4b97a2423eb
Introduce PGP utility functions
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diff
changeset
|
452 size_t nread; |
2187
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
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parents:
1811
diff
changeset
|
453 gpgme_key_t *keys; |
1041
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Introduce PGP utility functions
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diff
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|
454 gpgme_error_t err; |
2187
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
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parents:
1811
diff
changeset
|
455 unsigned i; |
1041
d4b97a2423eb
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parents:
diff
changeset
|
456 |
d4b97a2423eb
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diff
changeset
|
457 if (!gpg.enabled) |
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diff
changeset
|
458 return NULL; |
d4b97a2423eb
Introduce PGP utility functions
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parents:
diff
changeset
|
459 |
2187
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
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parents:
1811
diff
changeset
|
460 if (!keyids || !nkeys) { |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
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1811
diff
changeset
|
461 return NULL; |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
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1811
diff
changeset
|
462 } |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
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parents:
1811
diff
changeset
|
463 |
1041
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diff
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|
464 err = gpgme_new(&ctx); |
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parents:
diff
changeset
|
465 if (err) { |
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diff
changeset
|
466 scr_LogPrint(LPRINT_LOGNORM|LPRINT_NOTUTF8, |
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Introduce PGP utility functions
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parents:
diff
changeset
|
467 "GPGME error: %s", gpgme_strerror(err)); |
d4b97a2423eb
Introduce PGP utility functions
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parents:
diff
changeset
|
468 return NULL; |
d4b97a2423eb
Introduce PGP utility functions
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parents:
diff
changeset
|
469 } |
d4b97a2423eb
Introduce PGP utility functions
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parents:
diff
changeset
|
470 |
d4b97a2423eb
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diff
changeset
|
471 gpgme_set_protocol(ctx, GPGME_PROTOCOL_OpenPGP); |
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Introduce PGP utility functions
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parents:
diff
changeset
|
472 gpgme_set_textmode(ctx, 0); |
d4b97a2423eb
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diff
changeset
|
473 gpgme_set_armor(ctx, 1); |
d4b97a2423eb
Introduce PGP utility functions
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diff
changeset
|
474 |
2187
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
475 keys = g_new0(gpgme_key_t, 1+nkeys); |
2195
40ddaebeb81e
PGP: Add a memory allocation check and compilation directives
Mikael Berthe <mikael@lilotux.net>
parents:
2188
diff
changeset
|
476 if (!keys) { |
40ddaebeb81e
PGP: Add a memory allocation check and compilation directives
Mikael Berthe <mikael@lilotux.net>
parents:
2188
diff
changeset
|
477 gpgme_release(ctx); |
40ddaebeb81e
PGP: Add a memory allocation check and compilation directives
Mikael Berthe <mikael@lilotux.net>
parents:
2188
diff
changeset
|
478 return NULL; |
40ddaebeb81e
PGP: Add a memory allocation check and compilation directives
Mikael Berthe <mikael@lilotux.net>
parents:
2188
diff
changeset
|
479 } |
2187
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
480 |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
481 for (i = 0; i < nkeys; i++) { |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
482 err = gpgme_get_key(ctx, keyids[i], &keys[i], 0); |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
483 if (err || !keys[i]) { |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
484 scr_LogPrint(LPRINT_LOGNORM, "GPGME encryption error: cannot use key %s", |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
485 keyids[i]); |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
486 // We need to have err not null to ensure we won't try to encrypt |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
487 // without this key. |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
488 if (!err) err = GPG_ERR_UNKNOWN_ERRNO; |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
489 break; |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
490 } |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
491 } |
e3b66c8ead4f
PGP: Change gpg_encrypt() so that several encryption keys can be used
Mikael Berthe <mikael@lilotux.net>
parents:
1811
diff
changeset
|
492 |
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493 if (!err) { |
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494 err = gpgme_data_new_from_mem(&in, gpg_data, strlen(gpg_data), 0); |
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495 if (!err) { |
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496 err = gpgme_data_new(&out); |
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497 if (!err) { |
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498 err = gpgme_op_encrypt(ctx, keys, GPGME_ENCRYPT_ALWAYS_TRUST, in, out); |
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499 if (err) { |
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500 gpgme_data_release(out); |
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501 } else { |
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502 encrypted_data = gpgme_data_release_and_get_mem(out, &nread); |
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503 if (encrypted_data) { |
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504 // We need to add a trailing NULL |
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505 char *dd = g_strndup(encrypted_data, nread); |
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506 free(encrypted_data); |
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507 encrypted_data = dd; |
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508 } |
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509 } |
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510 } |
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511 gpgme_data_release(in); |
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512 } |
2187
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513 |
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514 if (err && err != GPG_ERR_CANCELED) { |
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515 scr_LogPrint(LPRINT_LOGNORM|LPRINT_NOTUTF8, |
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516 "GPGME encryption error: %s", gpgme_strerror(err)); |
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517 } |
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518 } |
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519 |
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520 for (i = 0; keys[i]; i++) |
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521 gpgme_key_release(keys[i]); |
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522 g_free(keys); |
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523 gpgme_release(ctx); |
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524 edata = strip_header_footer(encrypted_data); |
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525 if (encrypted_data) |
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526 free(encrypted_data); |
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527 return edata; |
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528 } |
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529 |
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530 // gpg_test_passphrase() |
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531 // Test the current gpg.passphrase with gpg.private_key. |
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532 // If the test doesn't succeed, the passphrase is cleared and a non-null |
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533 // value is returned. |
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534 int gpg_test_passphrase(void) |
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535 { |
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536 char *s; |
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537 |
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538 if (!gpg.private_key) |
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539 return -1; // No private key... |
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540 |
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541 s = gpg_sign("test"); |
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542 if (s) { |
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543 free(s); |
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544 return 0; // Ok, test successful |
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545 } |
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546 // The passphrase is wrong (if provided) |
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547 gpg_set_passphrase(NULL); |
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548 return -1; |
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549 } |
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550 |
1413 | 551 int gpg_enabled(void) |
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552 { |
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553 return gpg.enabled; |
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554 } |
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555 |
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556 #else /* not HAVE_GPGME */ |
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557 |
1413 | 558 int gpg_enabled(void) |
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559 { |
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560 return 0; |
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561 } |
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562 |
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563 #endif /* HAVE_GPGME */ |
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564 |
1811 | 565 /* vim: set et cindent cinoptions=>2\:2(0 ts=2 sw=2: For Vim users... */ |