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annotate signkey.c @ 794:d386defb5376 ecc

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more ecdsa signkey work, not correct
author Matt Johnston <matt@ucc.asn.au>
date Sun, 28 Apr 2013 23:17:43 +0800
parents 70625eed40c9
children 7f604f9b3756
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 #include "includes.h"
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26 #include "dbutil.h"
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27 #include "signkey.h"
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28 #include "buffer.h"
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29 #include "ssh.h"
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30 #include "ecdsa.h"
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31
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32 static const char *signkey_names[DROPBEAR_SIGNKEY_NUM_NAMED] = {
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33 #ifdef DROPBEAR_RSA
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34 "ssh-rsa",
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35 #endif
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36 #ifdef DROPBEAR_DSS
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37 "ssh-dss",
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38 #endif
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39 #ifdef DROPBEAR_ECDSA
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40 #ifdef DROPBEAR_ECC_256
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41 "ecdsa-sha2-nistp256",
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42 #endif
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43 #ifdef DROPBEAR_ECC_384
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44 "ecdsa-sha2-nistp384",
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45 #endif
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46 #ifdef DROPBEAR_ECC_521
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47 "ecdsa-sha2-nistp521",
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48 #endif
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49 "ecdsa" // for keygen
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50 #endif // DROPBEAR_ECDSA
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51 };
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52
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53 /* malloc a new sign_key and set the dss and rsa keys to NULL */
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54 sign_key * new_sign_key() {
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55
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56 sign_key * ret;
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57
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58 ret = (sign_key*)m_malloc(sizeof(sign_key));
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59 ret->type = DROPBEAR_SIGNKEY_NONE;
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60 ret->source = SIGNKEY_SOURCE_INVALID;
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61 return ret;
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62 }
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63
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64 /* Returns key name corresponding to the type. Exits fatally
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65 * if the type is invalid */
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66 const char* signkey_name_from_type(enum signkey_type type, unsigned int *namelen) {
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67 if (type >= DROPBEAR_SIGNKEY_NUM_NAMED) {
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68 dropbear_exit("Bad key type %d", type);
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69 }
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70
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71 if (namelen) {
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72 *namelen = strlen(signkey_names[type]);
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73 }
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74 return signkey_names[type];
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75 }
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76
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77 /* Returns DROPBEAR_SIGNKEY_NONE if none match */
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78 enum signkey_type signkey_type_from_name(const char* name, unsigned int namelen) {
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79 int i;
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80 for (i = 0; i < DROPBEAR_SIGNKEY_NUM_NAMED; i++) {
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81 const char *fixed_name = signkey_names[i];
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82 if (namelen == strlen(fixed_name)
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83 && memcmp(fixed_name, name, namelen) == 0) {
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84 return i;
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85 }
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86 }
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87
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88 TRACE(("signkey_type_from_name unexpected key type."))
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89
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90 return DROPBEAR_SIGNKEY_NONE;
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91 }
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92
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93 /* returns DROPBEAR_SUCCESS on success, DROPBEAR_FAILURE on fail.
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94 * type should be set by the caller to specify the type to read, and
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95 * on return is set to the type read (useful when type = _ANY) */
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96 int buf_get_pub_key(buffer *buf, sign_key *key, int *type) {
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97
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98 unsigned char* ident;
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99 unsigned int len;
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100 int keytype;
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101 int ret = DROPBEAR_FAILURE;
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102
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103 TRACE(("enter buf_get_pub_key"))
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104
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105 ident = buf_getstring(buf, &len);
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106 keytype = signkey_type_from_name(ident, len);
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107 m_free(ident);
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108
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109 if (*type != DROPBEAR_SIGNKEY_ANY && *type != keytype) {
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110 TRACE(("buf_get_pub_key bad type - got %d, expected %d", keytype, *type))
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111 return DROPBEAR_FAILURE;
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112 }
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113
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114 TRACE(("buf_get_pub_key keytype is %d", keytype))
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115
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116 *type = keytype;
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117
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118 /* Rewind the buffer back before "ssh-rsa" etc */
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119 buf_incrpos(buf, -len - 4);
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120
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121 #ifdef DROPBEAR_DSS
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122 if (keytype == DROPBEAR_SIGNKEY_DSS) {
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123 dss_key_free(key->dsskey);
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124 key->dsskey = m_malloc(sizeof(*key->dsskey));
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125 ret = buf_get_dss_pub_key(buf, key->dsskey);
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126 if (ret == DROPBEAR_FAILURE) {
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127 m_free(key->dsskey);
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128 }
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129 }
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130 #endif
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131 #ifdef DROPBEAR_RSA
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132 if (keytype == DROPBEAR_SIGNKEY_RSA) {
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133 rsa_key_free(key->rsakey);
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134 key->rsakey = m_malloc(sizeof(*key->rsakey));
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135 ret = buf_get_rsa_pub_key(buf, key->rsakey);
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136 if (ret == DROPBEAR_FAILURE) {
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137 m_free(key->rsakey);
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138 }
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139 }
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140 #endif
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141 #ifdef DROPBEAR_ECDSA
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142 if (keytype == DROPBEAR_SIGNKEY_ECDSA_NISTP256
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143 || keytype == DROPBEAR_SIGNKEY_ECDSA_NISTP384
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144 || keytype == DROPBEAR_SIGNKEY_ECDSA_NISTP521) {
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145 if (key->ecckey) {
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146 ecc_free(key->ecckey);
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147 }
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148 key->ecckey = buf_get_ecdsa_pub_key(buf);
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149 if (key->ecckey) {
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150 ret = DROPBEAR_SUCCESS;
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151 }
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152 }
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153 #endif
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154
165
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155 TRACE(("leave buf_get_pub_key"))
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156
44
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157 return ret;
4
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158
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159 }
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160
44
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161 /* returns DROPBEAR_SUCCESS on success, DROPBEAR_FAILURE on fail.
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162 * type should be set by the caller to specify the type to read, and
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163 * on return is set to the type read (useful when type = _ANY) */
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164 int buf_get_priv_key(buffer *buf, sign_key *key, int *type) {
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165
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166 unsigned char* ident;
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167 unsigned int len;
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168 int keytype;
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169 int ret = DROPBEAR_FAILURE;
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170
165
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171 TRACE(("enter buf_get_priv_key"))
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172
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173 ident = buf_getstring(buf, &len);
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174 keytype = signkey_type_from_name(ident, len);
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175 m_free(ident);
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176
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177 if (*type != DROPBEAR_SIGNKEY_ANY && *type != keytype) {
165
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178 TRACE(("wrong key type: %d %d", *type, keytype))
44
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179 return DROPBEAR_FAILURE;
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180 }
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181
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182 *type = keytype;
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183
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184 /* Rewind the buffer back before "ssh-rsa" etc */
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185 buf_incrpos(buf, -len - 4);
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186
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187 #ifdef DROPBEAR_DSS
44
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188 if (keytype == DROPBEAR_SIGNKEY_DSS) {
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189 dss_key_free(key->dsskey);
586
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190 key->dsskey = m_malloc(sizeof(*key->dsskey));
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191 ret = buf_get_dss_priv_key(buf, key->dsskey);
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192 if (ret == DROPBEAR_FAILURE) {
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193 m_free(key->dsskey);
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194 }
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195 }
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196 #endif
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197 #ifdef DROPBEAR_RSA
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198 if (keytype == DROPBEAR_SIGNKEY_RSA) {
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199 rsa_key_free(key->rsakey);
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200 key->rsakey = m_malloc(sizeof(*key->rsakey));
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201 ret = buf_get_rsa_priv_key(buf, key->rsakey);
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202 if (ret == DROPBEAR_FAILURE) {
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203 m_free(key->rsakey);
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204 }
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205 }
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206 #endif
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207 #ifdef DROPBEAR_ECDSA
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208 if (keytype == DROPBEAR_SIGNKEY_ECDSA_NISTP256
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209 || keytype == DROPBEAR_SIGNKEY_ECDSA_NISTP384
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210 || keytype == DROPBEAR_SIGNKEY_ECDSA_NISTP521) {
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211 if (key->ecckey) {
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212 ecc_free(key->ecckey);
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213 }
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214 key->ecckey = buf_get_ecdsa_priv_key(buf);
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215 if (key->ecckey) {
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216 ret = DROPBEAR_SUCCESS;
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217 }
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218 }
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219 #endif
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220
165
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221 TRACE(("leave buf_get_priv_key"))
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222
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223 return ret;
4
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224
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225 }
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226
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227 /* type is either DROPBEAR_SIGNKEY_DSS or DROPBEAR_SIGNKEY_RSA */
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228 void buf_put_pub_key(buffer* buf, sign_key *key, int type) {
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229
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230 buffer *pubkeys;
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231
165
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diff changeset
232 TRACE(("enter buf_put_pub_key"))
70
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233 pubkeys = buf_new(MAX_PUBKEY_SIZE);
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234
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235 #ifdef DROPBEAR_DSS
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236 if (type == DROPBEAR_SIGNKEY_DSS) {
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237 buf_put_dss_pub_key(pubkeys, key->dsskey);
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238 }
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239 #endif
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240 #ifdef DROPBEAR_RSA
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241 if (type == DROPBEAR_SIGNKEY_RSA) {
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242 buf_put_rsa_pub_key(pubkeys, key->rsakey);
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243 }
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244 #endif
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245 #ifdef DROPBEAR_ECDSA
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246 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP256
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247 || type == DROPBEAR_SIGNKEY_ECDSA_NISTP384
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248 || type == DROPBEAR_SIGNKEY_ECDSA_NISTP521) {
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249 buf_put_ecdsa_pub_key(pubkeys, key->ecckey);
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250 }
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251 #endif
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252 if (pubkeys->len == 0) {
594
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diff changeset
253 dropbear_exit("Bad key types in buf_put_pub_key");
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254 }
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255
760
f336d232fc63 Make _sign and _verify functions take a buffer* rather than void* and int
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diff changeset
256 buf_putbufstring(buf, pubkeys);
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257 buf_free(pubkeys);
165
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diff changeset
258 TRACE(("leave buf_put_pub_key"))
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259 }
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260
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261 /* type is either DROPBEAR_SIGNKEY_DSS or DROPBEAR_SIGNKEY_RSA */
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262 void buf_put_priv_key(buffer* buf, sign_key *key, int type) {
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263
165
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diff changeset
264 TRACE(("enter buf_put_priv_key"))
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diff changeset
265 TRACE(("type is %d", type))
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266
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267 #ifdef DROPBEAR_DSS
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268 if (type == DROPBEAR_SIGNKEY_DSS) {
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269 buf_put_dss_priv_key(buf, key->dsskey);
165
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diff changeset
270 TRACE(("leave buf_put_priv_key: dss done"))
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271 return;
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272 }
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273 #endif
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274 #ifdef DROPBEAR_RSA
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275 if (type == DROPBEAR_SIGNKEY_RSA) {
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276 buf_put_rsa_priv_key(buf, key->rsakey);
165
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277 TRACE(("leave buf_put_priv_key: rsa done"))
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278 return;
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279 }
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280 #endif
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281 #ifdef DROPBEAR_ECDSA
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282 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP256
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283 || type == DROPBEAR_SIGNKEY_ECDSA_NISTP384
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284 || type == DROPBEAR_SIGNKEY_ECDSA_NISTP521) {
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285 buf_put_ecdsa_pub_key(buf, key->ecckey);
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diff changeset
286 return;
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287 }
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diff changeset
288 #endif
594
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diff changeset
289 dropbear_exit("Bad key types in put pub key");
4
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290 }
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291
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292 void sign_key_free(sign_key *key) {
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293
165
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294 TRACE(("enter sign_key_free"))
4
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295
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296 #ifdef DROPBEAR_DSS
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297 dss_key_free(key->dsskey);
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298 key->dsskey = NULL;
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299 #endif
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300 #ifdef DROPBEAR_RSA
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301 rsa_key_free(key->rsakey);
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302 key->rsakey = NULL;
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303 #endif
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304 #ifdef DROPBEAR_ECDSA
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305 if (key->ecckey) {
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306 ecc_free(key->ecckey);
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307 key->ecckey = NULL;
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308 }
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309 #endif
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310
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311 m_free(key->filename);
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312
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313 m_free(key);
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314 TRACE(("leave sign_key_free"))
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315 }
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316
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317 static char hexdig(unsigned char x) {
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318 if (x > 0xf)
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319 return 'X';
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320
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321 if (x < 10)
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322 return '0' + x;
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323 else
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324 return 'a' + x - 10;
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325 }
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326
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327 /* Since we're not sure if we'll have md5 or sha1, we present both.
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328 * MD5 is used in preference, but sha1 could still be useful */
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329 #ifdef DROPBEAR_MD5_HMAC
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330 static char * sign_key_md5_fingerprint(unsigned char* keyblob,
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331 unsigned int keybloblen) {
4
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332
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333 char * ret;
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334 hash_state hs;
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335 unsigned char hash[MD5_HASH_SIZE];
214
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336 unsigned int i;
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337 unsigned int buflen;
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338
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339 md5_init(&hs);
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340
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341 /* skip the size int of the string - this is a bit messy */
51
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342 md5_process(&hs, keyblob, keybloblen);
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343
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344 md5_done(&hs, hash);
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345
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346 /* "md5 hexfingerprinthere\0", each hex digit is "AB:" etc */
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347 buflen = 4 + 3*MD5_HASH_SIZE;
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348 ret = (char*)m_malloc(buflen);
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349
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350 memset(ret, 'Z', buflen);
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351 strcpy(ret, "md5 ");
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352
214
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353 for (i = 0; i < MD5_HASH_SIZE; i++) {
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354 unsigned int pos = 4 + i*3;
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355 ret[pos] = hexdig(hash[i] >> 4);
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356 ret[pos+1] = hexdig(hash[i] & 0x0f);
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357 ret[pos+2] = ':';
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358 }
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359 ret[buflen-1] = 0x0;
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360
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361 return ret;
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362 }
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363
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364 #else /* use SHA1 rather than MD5 for fingerprint */
51
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365 static char * sign_key_sha1_fingerprint(unsigned char* keyblob,
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366 unsigned int keybloblen) {
4
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367
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368 char * ret;
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369 hash_state hs;
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370 unsigned char hash[SHA1_HASH_SIZE];
214
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371 unsigned int i;
4
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372 unsigned int buflen;
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373
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374 sha1_init(&hs);
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375
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376 /* skip the size int of the string - this is a bit messy */
51
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diff changeset
377 sha1_process(&hs, keyblob, keybloblen);
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378
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379 sha1_done(&hs, hash);
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380
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381 /* "sha1!! hexfingerprinthere\0", each hex digit is "AB:" etc */
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382 buflen = 7 + 3*SHA1_HASH_SIZE;
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383 ret = (char*)m_malloc(buflen);
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384
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385 strcpy(ret, "sha1!! ");
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386
214
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387 for (i = 0; i < SHA1_HASH_SIZE; i++) {
794
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388 unsigned int pos = 7 + 3*i;
214
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diff changeset
389 ret[pos] = hexdig(hash[i] >> 4);
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390 ret[pos+1] = hexdig(hash[i] & 0x0f);
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391 ret[pos+2] = ':';
4
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392 }
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393 ret[buflen-1] = 0x0;
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394
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diff changeset
395 return ret;
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diff changeset
396 }
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397
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diff changeset
398 #endif /* MD5/SHA1 switch */
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399
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diff changeset
400 /* This will return a freshly malloced string, containing a fingerprint
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diff changeset
401 * in either sha1 or md5 */
51
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diff changeset
402 char * sign_key_fingerprint(unsigned char* keyblob, unsigned int keybloblen) {
4
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403
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diff changeset
404 #ifdef DROPBEAR_MD5_HMAC
51
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diff changeset
405 return sign_key_md5_fingerprint(keyblob, keybloblen);
4
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diff changeset
406 #else
51
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diff changeset
407 return sign_key_sha1_fingerprint(keyblob, keybloblen);
4
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diff changeset
408 #endif
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diff changeset
409 }
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410
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diff changeset
411 void buf_put_sign(buffer* buf, sign_key *key, int type,
760
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diff changeset
412 buffer *data_buf) {
4
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diff changeset
413 buffer *sigblob;
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
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parents: 51
diff changeset
414 sigblob = buf_new(MAX_PUBKEY_SIZE);
4
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415
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diff changeset
416 #ifdef DROPBEAR_DSS
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diff changeset
417 if (type == DROPBEAR_SIGNKEY_DSS) {
760
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diff changeset
418 buf_put_dss_sign(sigblob, key->dsskey, data_buf);
4
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419 }
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diff changeset
420 #endif
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diff changeset
421 #ifdef DROPBEAR_RSA
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diff changeset
422 if (type == DROPBEAR_SIGNKEY_RSA) {
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diff changeset
423 buf_put_rsa_sign(sigblob, key->rsakey, data_buf);
4
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424 }
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diff changeset
425 #endif
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426 #ifdef DROPBEAR_ECDSA
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diff changeset
427 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP256
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diff changeset
428 || type == DROPBEAR_SIGNKEY_ECDSA_NISTP384
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diff changeset
429 || type == DROPBEAR_SIGNKEY_ECDSA_NISTP521) {
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diff changeset
430 buf_put_ecdsa_sign(sigblob, key->ecckey, data_buf);
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diff changeset
431 }
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diff changeset
432 #endif
4
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diff changeset
433 if (sigblob->len == 0) {
594
a98a2138364a Improve capitalisation for all logged strings
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parents: 586
diff changeset
434 dropbear_exit("Non-matching signing type");
4
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diff changeset
435 }
760
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diff changeset
436 buf_putbufstring(buf, sigblob);
4
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diff changeset
437 buf_free(sigblob);
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diff changeset
438
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diff changeset
439 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
440
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
441 #ifdef DROPBEAR_SIGNKEY_VERIFY
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
442 /* Return DROPBEAR_SUCCESS or DROPBEAR_FAILURE.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
443 * If FAILURE is returned, the position of
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
444 * buf is undefined. If SUCCESS is returned, buf will be positioned after the
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
445 * signature blob */
760
f336d232fc63 Make _sign and _verify functions take a buffer* rather than void* and int
Matt Johnston <matt@ucc.asn.au>
parents: 651
diff changeset
446 int buf_verify(buffer * buf, sign_key *key, buffer *data_buf) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
447
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
448 unsigned int bloblen;
794
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
449 unsigned char * type_name = NULL;
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
450 unsigned int type_name_len = 0;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
451
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
452 TRACE(("enter buf_verify"))
34
e2a1eaa19f22 Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents: 26
diff changeset
453
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
454 bloblen = buf_getint(buf);
794
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
455 type_name = buf_getstring(buf, &type_name_len);
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
456 enum signkey_type type = signkey_type_from_name(type_name, type_name_len);
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
457 m_free(type_name);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
458
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
459 #ifdef DROPBEAR_DSS
794
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
460 if (type == DROPBEAR_SIGNKEY_DSS) {
244
eb7b9f2bb8e8 - add explicit check that correct keytype exists for pubkey verification
Matt Johnston <matt@ucc.asn.au>
parents: 214
diff changeset
461 if (key->dsskey == NULL) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 586
diff changeset
462 dropbear_exit("No DSS key to verify signature");
244
eb7b9f2bb8e8 - add explicit check that correct keytype exists for pubkey verification
Matt Johnston <matt@ucc.asn.au>
parents: 214
diff changeset
463 }
760
f336d232fc63 Make _sign and _verify functions take a buffer* rather than void* and int
Matt Johnston <matt@ucc.asn.au>
parents: 651
diff changeset
464 return buf_dss_verify(buf, key->dsskey, data_buf);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
465 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
466 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
467
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
468 #ifdef DROPBEAR_RSA
794
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
469 if (type == DROPBEAR_SIGNKEY_RSA) {
244
eb7b9f2bb8e8 - add explicit check that correct keytype exists for pubkey verification
Matt Johnston <matt@ucc.asn.au>
parents: 214
diff changeset
470 if (key->rsakey == NULL) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 586
diff changeset
471 dropbear_exit("No RSA key to verify signature");
244
eb7b9f2bb8e8 - add explicit check that correct keytype exists for pubkey verification
Matt Johnston <matt@ucc.asn.au>
parents: 214
diff changeset
472 }
760
f336d232fc63 Make _sign and _verify functions take a buffer* rather than void* and int
Matt Johnston <matt@ucc.asn.au>
parents: 651
diff changeset
473 return buf_rsa_verify(buf, key->rsakey, data_buf);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
474 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
475 #endif
794
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
476 #ifdef DROPBEAR_ECDSA
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
477 if (type == DROPBEAR_SIGNKEY_ECDSA_NISTP256
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
478 || type == DROPBEAR_SIGNKEY_ECDSA_NISTP384
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
479 || type == DROPBEAR_SIGNKEY_ECDSA_NISTP521) {
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
480 return buf_ecdsa_verify(buf, key->ecckey, data_buf);
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
481 }
d386defb5376 more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents: 793
diff changeset
482 #endif
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
483
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 586
diff changeset
484 dropbear_exit("Non-matching signing type");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
485 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
486 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
487 #endif /* DROPBEAR_SIGNKEY_VERIFY */
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
488
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
489 #ifdef DROPBEAR_KEY_LINES /* ie we're using authorized_keys or known_hosts */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
490
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
491 /* Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE when given a buffer containing
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
492 * a key, a key, and a type. The buffer is positioned at the start of the
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
493 * base64 data, and contains no trailing data */
436
7282370416a0 Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents: 244
diff changeset
494 /* If fingerprint is non-NULL, it will be set to a malloc()ed fingerprint
7282370416a0 Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents: 244
diff changeset
495 of the key if it is successfully decoded */
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
496 int cmp_base64_key(const unsigned char* keyblob, unsigned int keybloblen,
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
497 const unsigned char* algoname, unsigned int algolen,
436
7282370416a0 Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents: 244
diff changeset
498 buffer * line, char ** fingerprint) {
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
499
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
500 buffer * decodekey = NULL;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
501 int ret = DROPBEAR_FAILURE;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
502 unsigned int len, filealgolen;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
503 unsigned long decodekeylen;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
504 unsigned char* filealgo = NULL;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
505
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
506 /* now we have the actual data */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
507 len = line->len - line->pos;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
508 decodekeylen = len * 2; /* big to be safe */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
509 decodekey = buf_new(decodekeylen);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
510
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
511 if (base64_decode(buf_getptr(line, len), len,
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
512 buf_getwriteptr(decodekey, decodekey->size),
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
513 &decodekeylen) != CRYPT_OK) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
514 TRACE(("checkpubkey: base64 decode failed"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
515 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
516 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
517 TRACE(("checkpubkey: base64_decode success"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
518 buf_incrlen(decodekey, decodekeylen);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
519
436
7282370416a0 Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents: 244
diff changeset
520 if (fingerprint) {
7282370416a0 Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents: 244
diff changeset
521 *fingerprint = sign_key_fingerprint(buf_getptr(decodekey, decodekeylen),
7282370416a0 Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents: 244
diff changeset
522 decodekeylen);
7282370416a0 Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents: 244
diff changeset
523 }
7282370416a0 Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents: 244
diff changeset
524
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
525 /* compare the keys */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
526 if ( ( decodekeylen != keybloblen )
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
527 || memcmp( buf_getptr(decodekey, decodekey->len),
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
528 keyblob, decodekey->len) != 0) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
529 TRACE(("checkpubkey: compare failed"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
530 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
531 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
532
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
533 /* ... and also check that the algo specified and the algo in the key
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
534 * itself match */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
535 filealgolen = buf_getint(decodekey);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
536 filealgo = buf_getptr(decodekey, filealgolen);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
537 if (filealgolen != algolen || memcmp(filealgo, algoname, algolen) != 0) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
538 TRACE(("checkpubkey: algo match failed"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
539 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
540 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
541
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
542 /* All checks passed */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
543 ret = DROPBEAR_SUCCESS;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
544
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
545 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
546 buf_free(decodekey);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
547 decodekey = NULL;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
548 return ret;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
549 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 44
diff changeset
550 #endif