Mercurial > dropbear
annotate signkey.c @ 805:724c3e0c8734 ecc
Add m_mp_alloc_init_multi() helper
author | Matt Johnston <matt@ucc.asn.au> |
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date | Thu, 23 May 2013 22:18:16 +0800 |
parents | 7dcb46da72d9 |
children | 75509065db53 |
rev | line source |
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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 "ecdsa-sha2-nistp256", |
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41 "ecdsa-sha2-nistp384", |
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42 "ecdsa-sha2-nistp521", |
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43 "ecdsa" // for keygen |
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44 #endif // DROPBEAR_ECDSA |
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45 }; |
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46 |
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47 /* malloc a new sign_key and set the dss and rsa keys to NULL */ |
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48 sign_key * new_sign_key() { |
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49 |
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50 sign_key * ret; |
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51 |
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52 ret = (sign_key*)m_malloc(sizeof(sign_key)); |
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53 ret->type = DROPBEAR_SIGNKEY_NONE; |
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54 ret->source = SIGNKEY_SOURCE_INVALID; |
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55 return ret; |
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56 } |
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57 |
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58 /* Returns key name corresponding to the type. Exits fatally |
44 | 59 * if the type is invalid */ |
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60 const char* signkey_name_from_type(enum signkey_type type, unsigned int *namelen) { |
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61 if (type >= DROPBEAR_SIGNKEY_NUM_NAMED) { |
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62 dropbear_exit("Bad key type %d", type); |
44 | 63 } |
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64 |
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65 if (namelen) { |
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66 *namelen = strlen(signkey_names[type]); |
44 | 67 } |
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68 return signkey_names[type]; |
44 | 69 } |
70 | |
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71 /* Returns DROPBEAR_SIGNKEY_NONE if none match */ |
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72 enum signkey_type signkey_type_from_name(const char* name, unsigned int namelen) { |
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73 int i; |
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74 for (i = 0; i < DROPBEAR_SIGNKEY_NUM_NAMED; i++) { |
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75 const char *fixed_name = signkey_names[i]; |
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76 if (namelen == strlen(fixed_name) |
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77 && memcmp(fixed_name, name, namelen) == 0) { |
44 | 78 |
795 | 79 #ifdef DROPBEAR_ECDSA |
80 /* Some of the ECDSA key sizes are defined even if they're not compiled in */ | |
81 if (0 | |
82 #ifndef DROPBEAR_ECC_256 | |
83 || i == DROPBEAR_SIGNKEY_ECDSA_NISTP256 | |
84 #endif | |
85 #ifndef DROPBEAR_ECC_384 | |
86 || i == DROPBEAR_SIGNKEY_ECDSA_NISTP384 | |
44 | 87 #endif |
795 | 88 #ifndef DROPBEAR_ECC_521 |
89 || i == DROPBEAR_SIGNKEY_ECDSA_NISTP521 | |
90 #endif | |
91 ) { | |
92 TRACE(("attempt to use ecdsa type %d not compiled in", i)) | |
93 return DROPBEAR_SIGNKEY_NONE; | |
94 } | |
95 #endif | |
96 | |
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97 return i; |
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98 } |
44 | 99 } |
100 | |
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101 TRACE(("signkey_type_from_name unexpected key type.")) |
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102 |
44 | 103 return DROPBEAR_SIGNKEY_NONE; |
104 } | |
105 | |
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106 /* returns DROPBEAR_SUCCESS on success, DROPBEAR_FAILURE on fail. |
26 | 107 * type should be set by the caller to specify the type to read, and |
108 * on return is set to the type read (useful when type = _ANY) */ | |
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109 int buf_get_pub_key(buffer *buf, sign_key *key, int *type) { |
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110 |
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111 unsigned char* ident; |
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112 unsigned int len; |
44 | 113 int keytype; |
114 int ret = DROPBEAR_FAILURE; | |
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115 |
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116 TRACE2(("enter buf_get_pub_key")) |
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117 |
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118 ident = buf_getstring(buf, &len); |
44 | 119 keytype = signkey_type_from_name(ident, len); |
120 m_free(ident); | |
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121 |
44 | 122 if (*type != DROPBEAR_SIGNKEY_ANY && *type != keytype) { |
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123 TRACE(("buf_get_pub_key bad type - got %d, expected %d", keytype, *type)) |
44 | 124 return DROPBEAR_FAILURE; |
125 } | |
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126 |
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127 TRACE2(("buf_get_pub_key keytype is %d", keytype)) |
44 | 128 |
129 *type = keytype; | |
130 | |
131 /* Rewind the buffer back before "ssh-rsa" etc */ | |
132 buf_incrpos(buf, -len - 4); | |
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133 |
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134 #ifdef DROPBEAR_DSS |
44 | 135 if (keytype == DROPBEAR_SIGNKEY_DSS) { |
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136 dss_key_free(key->dsskey); |
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137 key->dsskey = m_malloc(sizeof(*key->dsskey)); |
44 | 138 ret = buf_get_dss_pub_key(buf, key->dsskey); |
139 if (ret == DROPBEAR_FAILURE) { | |
140 m_free(key->dsskey); | |
141 } | |
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142 } |
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143 #endif |
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144 #ifdef DROPBEAR_RSA |
44 | 145 if (keytype == DROPBEAR_SIGNKEY_RSA) { |
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146 rsa_key_free(key->rsakey); |
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147 key->rsakey = m_malloc(sizeof(*key->rsakey)); |
44 | 148 ret = buf_get_rsa_pub_key(buf, key->rsakey); |
149 if (ret == DROPBEAR_FAILURE) { | |
150 m_free(key->rsakey); | |
151 } | |
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152 } |
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153 #endif |
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154 #ifdef DROPBEAR_ECDSA |
795 | 155 if (IS_ECDSA_KEY(keytype)) { |
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156 if (key->ecckey) { |
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157 ecc_free(key->ecckey); |
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158 } |
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159 key->ecckey = buf_get_ecdsa_pub_key(buf); |
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160 if (key->ecckey) { |
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161 ret = DROPBEAR_SUCCESS; |
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162 } |
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163 } |
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164 #endif |
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165 |
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166 TRACE2(("leave buf_get_pub_key")) |
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167 |
44 | 168 return ret; |
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169 |
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170 } |
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171 |
44 | 172 /* returns DROPBEAR_SUCCESS on success, DROPBEAR_FAILURE on fail. |
173 * type should be set by the caller to specify the type to read, and | |
174 * on return is set to the type read (useful when type = _ANY) */ | |
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175 int buf_get_priv_key(buffer *buf, sign_key *key, int *type) { |
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176 |
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177 unsigned char* ident; |
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178 unsigned int len; |
44 | 179 int keytype; |
180 int ret = DROPBEAR_FAILURE; | |
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181 |
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182 TRACE2(("enter buf_get_priv_key")) |
44 | 183 |
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184 ident = buf_getstring(buf, &len); |
44 | 185 keytype = signkey_type_from_name(ident, len); |
186 m_free(ident); | |
187 | |
188 if (*type != DROPBEAR_SIGNKEY_ANY && *type != keytype) { | |
165
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189 TRACE(("wrong key type: %d %d", *type, keytype)) |
44 | 190 return DROPBEAR_FAILURE; |
191 } | |
192 | |
193 *type = keytype; | |
194 | |
195 /* Rewind the buffer back before "ssh-rsa" etc */ | |
196 buf_incrpos(buf, -len - 4); | |
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197 |
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198 #ifdef DROPBEAR_DSS |
44 | 199 if (keytype == DROPBEAR_SIGNKEY_DSS) { |
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200 dss_key_free(key->dsskey); |
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201 key->dsskey = m_malloc(sizeof(*key->dsskey)); |
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202 ret = buf_get_dss_priv_key(buf, key->dsskey); |
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203 if (ret == DROPBEAR_FAILURE) { |
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204 m_free(key->dsskey); |
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205 } |
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206 } |
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207 #endif |
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208 #ifdef DROPBEAR_RSA |
44 | 209 if (keytype == DROPBEAR_SIGNKEY_RSA) { |
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210 rsa_key_free(key->rsakey); |
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211 key->rsakey = m_malloc(sizeof(*key->rsakey)); |
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212 ret = buf_get_rsa_priv_key(buf, key->rsakey); |
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213 if (ret == DROPBEAR_FAILURE) { |
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214 m_free(key->rsakey); |
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215 } |
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216 } |
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217 #endif |
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218 #ifdef DROPBEAR_ECDSA |
795 | 219 if (IS_ECDSA_KEY(keytype)) { |
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220 if (key->ecckey) { |
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221 ecc_free(key->ecckey); |
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222 } |
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223 key->ecckey = buf_get_ecdsa_priv_key(buf); |
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224 if (key->ecckey) { |
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225 ret = DROPBEAR_SUCCESS; |
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226 } |
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227 } |
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228 #endif |
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229 |
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230 TRACE2(("leave buf_get_priv_key")) |
44 | 231 |
232 return ret; | |
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233 |
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234 } |
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235 |
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236 /* type is either DROPBEAR_SIGNKEY_DSS or DROPBEAR_SIGNKEY_RSA */ |
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237 void buf_put_pub_key(buffer* buf, sign_key *key, int type) { |
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238 |
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239 buffer *pubkeys; |
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240 |
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241 TRACE2(("enter buf_put_pub_key")) |
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242 pubkeys = buf_new(MAX_PUBKEY_SIZE); |
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243 |
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244 #ifdef DROPBEAR_DSS |
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245 if (type == DROPBEAR_SIGNKEY_DSS) { |
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246 buf_put_dss_pub_key(pubkeys, key->dsskey); |
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247 } |
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248 #endif |
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249 #ifdef DROPBEAR_RSA |
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250 if (type == DROPBEAR_SIGNKEY_RSA) { |
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251 buf_put_rsa_pub_key(pubkeys, key->rsakey); |
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252 } |
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253 #endif |
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254 #ifdef DROPBEAR_ECDSA |
795 | 255 if (IS_ECDSA_KEY(type)) { |
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256 buf_put_ecdsa_pub_key(pubkeys, key->ecckey); |
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257 } |
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258 #endif |
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259 if (pubkeys->len == 0) { |
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260 dropbear_exit("Bad key types in buf_put_pub_key"); |
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261 } |
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262 |
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263 buf_putbufstring(buf, pubkeys); |
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264 buf_free(pubkeys); |
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265 TRACE2(("leave buf_put_pub_key")) |
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266 } |
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267 |
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268 /* type is either DROPBEAR_SIGNKEY_DSS or DROPBEAR_SIGNKEY_RSA */ |
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269 void buf_put_priv_key(buffer* buf, sign_key *key, int type) { |
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270 |
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271 TRACE(("enter buf_put_priv_key")) |
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272 TRACE(("type is %d", type)) |
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273 |
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274 #ifdef DROPBEAR_DSS |
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275 if (type == DROPBEAR_SIGNKEY_DSS) { |
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276 buf_put_dss_priv_key(buf, key->dsskey); |
165
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277 TRACE(("leave buf_put_priv_key: dss 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_RSA |
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282 if (type == DROPBEAR_SIGNKEY_RSA) { |
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283 buf_put_rsa_priv_key(buf, key->rsakey); |
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284 TRACE(("leave buf_put_priv_key: rsa done")) |
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285 return; |
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286 } |
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287 #endif |
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288 #ifdef DROPBEAR_ECDSA |
795 | 289 if (IS_ECDSA_KEY(type)) { |
290 buf_put_ecdsa_priv_key(buf, key->ecckey); | |
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291 return; |
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292 } |
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293 #endif |
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294 dropbear_exit("Bad key types in put pub key"); |
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295 } |
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296 |
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297 void sign_key_free(sign_key *key) { |
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298 |
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299 TRACE2(("enter sign_key_free")) |
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300 |
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301 #ifdef DROPBEAR_DSS |
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302 dss_key_free(key->dsskey); |
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303 key->dsskey = NULL; |
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304 #endif |
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305 #ifdef DROPBEAR_RSA |
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306 rsa_key_free(key->rsakey); |
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307 key->rsakey = NULL; |
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308 #endif |
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309 #ifdef DROPBEAR_ECDSA |
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310 if (key->ecckey) { |
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311 ecc_free(key->ecckey); |
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312 key->ecckey = NULL; |
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313 } |
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314 #endif |
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315 |
551
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316 m_free(key->filename); |
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317 |
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318 m_free(key); |
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319 TRACE2(("leave sign_key_free")) |
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320 } |
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321 |
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322 static char hexdig(unsigned char x) { |
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323 if (x > 0xf) |
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324 return 'X'; |
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325 |
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326 if (x < 10) |
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327 return '0' + x; |
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328 else |
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329 return 'a' + x - 10; |
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330 } |
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331 |
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332 /* Since we're not sure if we'll have md5 or sha1, we present both. |
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333 * MD5 is used in preference, but sha1 could still be useful */ |
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334 #ifdef DROPBEAR_MD5_HMAC |
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335 static char * sign_key_md5_fingerprint(unsigned char* keyblob, |
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336 unsigned int keybloblen) { |
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337 |
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338 char * ret; |
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339 hash_state hs; |
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340 unsigned char hash[MD5_HASH_SIZE]; |
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341 unsigned int i; |
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342 unsigned int buflen; |
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343 |
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344 md5_init(&hs); |
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345 |
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346 /* skip the size int of the string - this is a bit messy */ |
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347 md5_process(&hs, keyblob, keybloblen); |
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348 |
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349 md5_done(&hs, hash); |
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350 |
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351 /* "md5 hexfingerprinthere\0", each hex digit is "AB:" etc */ |
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352 buflen = 4 + 3*MD5_HASH_SIZE; |
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353 ret = (char*)m_malloc(buflen); |
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354 |
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355 memset(ret, 'Z', buflen); |
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356 strcpy(ret, "md5 "); |
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357 |
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358 for (i = 0; i < MD5_HASH_SIZE; i++) { |
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359 unsigned int pos = 4 + i*3; |
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360 ret[pos] = hexdig(hash[i] >> 4); |
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361 ret[pos+1] = hexdig(hash[i] & 0x0f); |
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362 ret[pos+2] = ':'; |
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363 } |
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364 ret[buflen-1] = 0x0; |
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365 |
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366 return ret; |
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367 } |
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368 |
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369 #else /* use SHA1 rather than MD5 for fingerprint */ |
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370 static char * sign_key_sha1_fingerprint(unsigned char* keyblob, |
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371 unsigned int keybloblen) { |
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372 |
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373 char * ret; |
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374 hash_state hs; |
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375 unsigned char hash[SHA1_HASH_SIZE]; |
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376 unsigned int i; |
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377 unsigned int buflen; |
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378 |
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379 sha1_init(&hs); |
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380 |
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381 /* skip the size int of the string - this is a bit messy */ |
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382 sha1_process(&hs, keyblob, keybloblen); |
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383 |
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384 sha1_done(&hs, hash); |
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385 |
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386 /* "sha1!! hexfingerprinthere\0", each hex digit is "AB:" etc */ |
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387 buflen = 7 + 3*SHA1_HASH_SIZE; |
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388 ret = (char*)m_malloc(buflen); |
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389 |
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390 strcpy(ret, "sha1!! "); |
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391 |
214
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392 for (i = 0; i < SHA1_HASH_SIZE; i++) { |
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393 unsigned int pos = 7 + 3*i; |
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394 ret[pos] = hexdig(hash[i] >> 4); |
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395 ret[pos+1] = hexdig(hash[i] & 0x0f); |
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396 ret[pos+2] = ':'; |
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397 } |
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398 ret[buflen-1] = 0x0; |
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399 |
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400 return ret; |
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401 } |
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402 |
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403 #endif /* MD5/SHA1 switch */ |
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404 |
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405 /* This will return a freshly malloced string, containing a fingerprint |
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406 * in either sha1 or md5 */ |
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407 char * sign_key_fingerprint(unsigned char* keyblob, unsigned int keybloblen) { |
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408 |
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409 #ifdef DROPBEAR_MD5_HMAC |
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410 return sign_key_md5_fingerprint(keyblob, keybloblen); |
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411 #else |
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412 return sign_key_sha1_fingerprint(keyblob, keybloblen); |
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413 #endif |
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414 } |
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415 |
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416 void buf_put_sign(buffer* buf, sign_key *key, int type, |
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417 buffer *data_buf) { |
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418 buffer *sigblob; |
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419 sigblob = buf_new(MAX_PUBKEY_SIZE); |
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420 |
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421 #ifdef DROPBEAR_DSS |
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422 if (type == DROPBEAR_SIGNKEY_DSS) { |
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423 buf_put_dss_sign(sigblob, key->dsskey, data_buf); |
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424 } |
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425 #endif |
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426 #ifdef DROPBEAR_RSA |
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427 if (type == DROPBEAR_SIGNKEY_RSA) { |
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428 buf_put_rsa_sign(sigblob, key->rsakey, data_buf); |
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429 } |
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430 #endif |
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431 #ifdef DROPBEAR_ECDSA |
795 | 432 if (IS_ECDSA_KEY(type)) { |
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433 buf_put_ecdsa_sign(sigblob, key->ecckey, data_buf); |
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434 } |
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435 #endif |
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436 if (sigblob->len == 0) { |
594
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Improve capitalisation for all logged strings
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|
437 dropbear_exit("Non-matching signing type"); |
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438 } |
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439 buf_putbufstring(buf, sigblob); |
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|
440 buf_free(sigblob); |
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441 |
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442 } |
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443 |
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444 #ifdef DROPBEAR_SIGNKEY_VERIFY |
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|
445 /* Return DROPBEAR_SUCCESS or DROPBEAR_FAILURE. |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
446 * If FAILURE is returned, the position of |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
447 * 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
|
448 * 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
|
449 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
|
450 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
451 unsigned int bloblen; |
794
d386defb5376
more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
452 unsigned char * type_name = NULL; |
d386defb5376
more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
453 unsigned int type_name_len = 0; |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
454 |
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
|
455 TRACE(("enter buf_verify")) |
34
e2a1eaa19f22
Client mostly works up to password auth
Matt Johnston <matt@ucc.asn.au>
parents:
26
diff
changeset
|
456 |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
457 bloblen = buf_getint(buf); |
794
d386defb5376
more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
458 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
|
459 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
|
460 m_free(type_name); |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
461 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
462 #ifdef DROPBEAR_DSS |
794
d386defb5376
more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
463 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
|
464 if (key->dsskey == NULL) { |
594
a98a2138364a
Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents:
586
diff
changeset
|
465 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
|
466 } |
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
|
467 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
|
468 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
469 #endif |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
470 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
471 #ifdef DROPBEAR_RSA |
794
d386defb5376
more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
472 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
|
473 if (key->rsakey == NULL) { |
594
a98a2138364a
Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents:
586
diff
changeset
|
474 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
|
475 } |
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
|
476 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
|
477 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
478 #endif |
794
d386defb5376
more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
479 #ifdef DROPBEAR_ECDSA |
795 | 480 if (IS_ECDSA_KEY(type)) { |
794
d386defb5376
more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
481 return buf_ecdsa_verify(buf, key->ecckey, data_buf); |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
482 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
483 #endif |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
484 |
594
a98a2138364a
Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents:
586
diff
changeset
|
485 dropbear_exit("Non-matching signing type"); |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
486 return DROPBEAR_FAILURE; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
487 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
488 #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
|
489 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
490 #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
|
491 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
492 /* 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
|
493 * 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
|
494 * base64 data, and contains no trailing data */ |
436
7282370416a0
Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents:
244
diff
changeset
|
495 /* 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
|
496 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
|
497 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
|
498 const unsigned char* algoname, unsigned int algolen, |
436
7282370416a0
Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents:
244
diff
changeset
|
499 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
|
500 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
501 buffer * decodekey = NULL; |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
502 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
|
503 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
|
504 unsigned long decodekeylen; |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
505 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
|
506 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
507 /* 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
|
508 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
|
509 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
|
510 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
|
511 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
512 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
|
513 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
|
514 &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
|
515 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
|
516 goto out; |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
517 } |
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
|
518 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
|
519 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
|
520 |
436
7282370416a0
Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents:
244
diff
changeset
|
521 if (fingerprint) { |
7282370416a0
Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents:
244
diff
changeset
|
522 *fingerprint = sign_key_fingerprint(buf_getptr(decodekey, decodekeylen), |
7282370416a0
Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents:
244
diff
changeset
|
523 decodekeylen); |
7282370416a0
Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents:
244
diff
changeset
|
524 } |
7282370416a0
Improve known_hosts checking.
Matt Johnston <matt@ucc.asn.au>
parents:
244
diff
changeset
|
525 |
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
526 /* compare the keys */ |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
527 if ( ( decodekeylen != keybloblen ) |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
528 || 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
|
529 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
|
530 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
|
531 goto out; |
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 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
534 /* ... 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
|
535 * itself match */ |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
536 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
|
537 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
|
538 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
|
539 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
|
540 goto out; |
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 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
543 /* All checks passed */ |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
544 ret = DROPBEAR_SUCCESS; |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
545 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
546 out: |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
547 buf_free(decodekey); |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
548 decodekey = NULL; |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
549 return ret; |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
550 } |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
551 #endif |