| 1 | (* HCoop Domtool (http://hcoop.sourceforge.net/) |
| 2 | * Copyright (c) 2006, Adam Chlipala |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version 2 |
| 7 | * of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | *) |
| 18 | |
| 19 | (* OpenSSL *) |
| 20 | |
| 21 | structure OpenSSL :> OPENSSL = struct |
| 22 | |
| 23 | val () = (F_OpenSSL_SML_init.f' (); |
| 24 | F_OpenSSL_SML_load_error_strings.f' (); |
| 25 | F_OpenSSL_SML_load_BIO_strings.f' ()) |
| 26 | |
| 27 | exception OpenSSL of string |
| 28 | |
| 29 | type context = (ST_ssl_ctx_st.tag, C_Int.rw) C_Int.su_obj C_Int.ptr' |
| 30 | type bio = (ST_bio_st.tag, C_Int.rw) C_Int.su_obj C_Int.ptr' |
| 31 | type listener = bio |
| 32 | |
| 33 | fun ssl_err s = |
| 34 | let |
| 35 | val err = F_OpenSSL_SML_get_error.f () |
| 36 | |
| 37 | val lib = F_OpenSSL_SML_lib_error_string.f err |
| 38 | val func = F_OpenSSL_SML_func_error_string.f err |
| 39 | val reason = F_OpenSSL_SML_reason_error_string.f err |
| 40 | in |
| 41 | print s; |
| 42 | print "\nReason: "; |
| 43 | if C.Ptr.isNull lib then |
| 44 | () |
| 45 | else |
| 46 | (print (ZString.toML lib); |
| 47 | print ":"); |
| 48 | if C.Ptr.isNull func then |
| 49 | () |
| 50 | else |
| 51 | (print (ZString.toML func); |
| 52 | print ":"); |
| 53 | if C.Ptr.isNull reason then |
| 54 | () |
| 55 | else |
| 56 | print (ZString.toML reason); |
| 57 | print "\n" |
| 58 | end |
| 59 | |
| 60 | val readBuf : (C.uchar, C.rw) C.obj C.ptr' = C.alloc' C.S.uchar (Word.fromInt Config.bufSize) |
| 61 | val bufSize = Int32.fromInt Config.bufSize |
| 62 | val one = Int32.fromInt 1 |
| 63 | val four = Int32.fromInt 4 |
| 64 | |
| 65 | val eight = Word.fromInt 8 |
| 66 | val sixteen = Word.fromInt 16 |
| 67 | val twentyfour = Word.fromInt 24 |
| 68 | |
| 69 | val mask1 = Word32.fromInt 255 |
| 70 | |
| 71 | fun readChar bio = |
| 72 | let |
| 73 | val r = F_OpenSSL_SML_read.f' (bio, C.Ptr.inject' readBuf, one) |
| 74 | in |
| 75 | if r = 0 then |
| 76 | NONE |
| 77 | else if r < 0 then |
| 78 | (ssl_err "BIO_read"; |
| 79 | raise OpenSSL "BIO_read failed") |
| 80 | else |
| 81 | SOME (chr (Compat.Char.toInt (C.Get.uchar' |
| 82 | (C.Ptr.sub' C.S.uchar (readBuf, 0))))) |
| 83 | end |
| 84 | |
| 85 | val charToWord = Word32.fromLargeWord o Compat.Char.toLargeWord |
| 86 | |
| 87 | fun readInt bio = |
| 88 | let |
| 89 | val r = F_OpenSSL_SML_read.f' (bio, C.Ptr.inject' readBuf, four) |
| 90 | in |
| 91 | if r = 0 then |
| 92 | NONE |
| 93 | else if r < 0 then |
| 94 | (ssl_err "BIO_read"; |
| 95 | raise OpenSSL "BIO_read failed") |
| 96 | else |
| 97 | SOME (Word32.toInt |
| 98 | (Word32.+ |
| 99 | (charToWord (C.Get.uchar' (C.Ptr.sub' C.S.uchar (readBuf, 0))), |
| 100 | Word32.+ |
| 101 | (Word32.<< (charToWord (C.Get.uchar' (C.Ptr.sub' C.S.uchar (readBuf, 1))), |
| 102 | eight), |
| 103 | Word32.+ |
| 104 | (Word32.<< (charToWord (C.Get.uchar' (C.Ptr.sub' C.S.uchar (readBuf, 2))), |
| 105 | sixteen), |
| 106 | Word32.<< (charToWord (C.Get.uchar' (C.Ptr.sub' C.S.uchar (readBuf, 3))), |
| 107 | twentyfour)))))) |
| 108 | end |
| 109 | |
| 110 | fun readLen (bio, len) = |
| 111 | if len = 0 then |
| 112 | SOME "" |
| 113 | else |
| 114 | let |
| 115 | val buf = |
| 116 | if len > Config.bufSize then |
| 117 | C.alloc' C.S.uchar (Word.fromInt len) |
| 118 | else |
| 119 | readBuf |
| 120 | |
| 121 | fun cleanup () = |
| 122 | if len > Config.bufSize then |
| 123 | C.free' buf |
| 124 | else |
| 125 | () |
| 126 | |
| 127 | fun loop (buf', needed) = |
| 128 | let |
| 129 | val r = F_OpenSSL_SML_read.f' (bio, C.Ptr.inject' buf, Int32.fromInt len) |
| 130 | in |
| 131 | if r = 0 then |
| 132 | (cleanup (); NONE) |
| 133 | else if r < 0 then |
| 134 | (cleanup (); |
| 135 | ssl_err "BIO_read"; |
| 136 | raise OpenSSL "BIO_read failed") |
| 137 | else if r = needed then |
| 138 | SOME (CharVector.tabulate (Int32.toInt needed, |
| 139 | fn i => chr (Compat.Char.toInt (C.Get.uchar' |
| 140 | (C.Ptr.sub' C.S.uchar (buf, i)))))) |
| 141 | else |
| 142 | loop (C.Ptr.|+! C.S.uchar (buf', Int32.toInt r), needed - r) |
| 143 | end |
| 144 | in |
| 145 | loop (buf, Int32.fromInt len) |
| 146 | before cleanup () |
| 147 | end |
| 148 | |
| 149 | fun readChunk bio = |
| 150 | let |
| 151 | val r = F_OpenSSL_SML_read.f' (bio, C.Ptr.inject' readBuf, bufSize) |
| 152 | in |
| 153 | if r = 0 then |
| 154 | NONE |
| 155 | else if r < 0 then |
| 156 | (ssl_err "BIO_read"; |
| 157 | raise OpenSSL "BIO_read failed") |
| 158 | else |
| 159 | SOME (CharVector.tabulate (Int32.toInt r, |
| 160 | fn i => chr (Compat.Char.toInt (C.Get.uchar' |
| 161 | (C.Ptr.sub' C.S.uchar (readBuf, i)))))) |
| 162 | end |
| 163 | |
| 164 | fun readString bio = |
| 165 | case readInt bio of |
| 166 | NONE => NONE |
| 167 | | SOME len => readLen (bio, len) |
| 168 | |
| 169 | fun writeChar (bio, ch) = |
| 170 | let |
| 171 | val _ = C.Set.uchar' (C.Ptr.sub' C.S.uchar (readBuf, 0), |
| 172 | Compat.Char.fromInt (ord ch)) |
| 173 | |
| 174 | fun trier () = |
| 175 | let |
| 176 | val r = F_OpenSSL_SML_write.f' (bio, C.Ptr.inject' readBuf, one) |
| 177 | in |
| 178 | if r = 0 then |
| 179 | trier () |
| 180 | else if r < 0 then |
| 181 | (ssl_err "BIO_write"; |
| 182 | raise OpenSSL "BIO_write") |
| 183 | else |
| 184 | () |
| 185 | end |
| 186 | in |
| 187 | trier () |
| 188 | end |
| 189 | |
| 190 | val wordToChar = Compat.Char.fromLargeWord o Word32.toLargeWord |
| 191 | |
| 192 | fun writeInt (bio, n) = |
| 193 | let |
| 194 | val w = Word32.fromInt n |
| 195 | |
| 196 | val _ = (C.Set.uchar' (C.Ptr.sub' C.S.uchar (readBuf, 0), |
| 197 | wordToChar (Word32.andb (w, mask1))); |
| 198 | C.Set.uchar' (C.Ptr.sub' C.S.uchar (readBuf, 1), |
| 199 | wordToChar (Word32.andb (Word32.>> (w, eight), mask1))); |
| 200 | C.Set.uchar' (C.Ptr.sub' C.S.uchar (readBuf, 2), |
| 201 | wordToChar (Word32.andb (Word32.>> (w, sixteen), mask1))); |
| 202 | C.Set.uchar' (C.Ptr.sub' C.S.uchar (readBuf, 3), |
| 203 | wordToChar (Word32.andb (Word32.>> (w, twentyfour), mask1)))) |
| 204 | |
| 205 | fun trier (buf, count) = |
| 206 | let |
| 207 | val r = F_OpenSSL_SML_write.f' (bio, C.Ptr.inject' buf, count) |
| 208 | in |
| 209 | if r < 0 then |
| 210 | (ssl_err "BIO_write"; |
| 211 | raise OpenSSL "BIO_write") |
| 212 | else if r = count then |
| 213 | () |
| 214 | else |
| 215 | trier (C.Ptr.|+! C.S.uchar (buf, Int32.toInt r), count - r) |
| 216 | end |
| 217 | in |
| 218 | trier (readBuf, 4) |
| 219 | end |
| 220 | |
| 221 | fun writeString' (bio, s) = |
| 222 | if size s = 0 then |
| 223 | () |
| 224 | else |
| 225 | let |
| 226 | val buf = ZString.dupML' s |
| 227 | in |
| 228 | if F_OpenSSL_SML_puts.f' (bio, buf) <= 0 then |
| 229 | (C.free' buf; |
| 230 | ssl_err "BIO_puts"; |
| 231 | raise OpenSSL "BIO_puts") |
| 232 | else |
| 233 | C.free' buf |
| 234 | end |
| 235 | |
| 236 | fun writeString (bio, s) = |
| 237 | (writeInt (bio, size s); |
| 238 | writeString' (bio, s)) |
| 239 | |
| 240 | fun context printErr (chain, key, root) = |
| 241 | let |
| 242 | val context = F_OpenSSL_SML_CTX_new.f' (F_OpenSSL_SML_SSLv23_method.f' ()) |
| 243 | in |
| 244 | if C.Ptr.isNull' context then |
| 245 | (if printErr then ssl_err "Error creating SSL context" else (); |
| 246 | raise OpenSSL "Can't create SSL context") |
| 247 | else if F_OpenSSL_SML_use_certificate_chain_file.f' (context, |
| 248 | ZString.dupML' chain) |
| 249 | = 0 then |
| 250 | (if printErr then ssl_err "Error using certificate chain" else (); |
| 251 | F_OpenSSL_SML_CTX_free.f' context; |
| 252 | raise OpenSSL "Can't load certificate chain") |
| 253 | else if F_OpenSSL_SML_use_PrivateKey_file.f' (context, |
| 254 | ZString.dupML' key) |
| 255 | = 0 then |
| 256 | (if printErr then ssl_err "Error using private key" else (); |
| 257 | F_OpenSSL_SML_CTX_free.f' context; |
| 258 | raise OpenSSL "Can't load private key") |
| 259 | else if F_OpenSSL_SML_load_verify_locations.f' (context, |
| 260 | ZString.dupML' root, |
| 261 | C.Ptr.null') = 0 then |
| 262 | (if printErr then ssl_err "Error loading trust store" else (); |
| 263 | F_OpenSSL_SML_CTX_free.f' context; |
| 264 | raise OpenSSL "Can't load trust store") |
| 265 | else |
| 266 | context |
| 267 | end |
| 268 | |
| 269 | fun connect printErr (context, hostname) = |
| 270 | let |
| 271 | val bio = F_OpenSSL_SML_new_ssl_connect.f' context |
| 272 | |
| 273 | val ssl_err = |
| 274 | if printErr then |
| 275 | ssl_err |
| 276 | else |
| 277 | (fn _ => ()) |
| 278 | in |
| 279 | if C.Ptr.isNull' bio then |
| 280 | (ssl_err ("Error initializating connection to " ^ hostname); |
| 281 | F_OpenSSL_SML_free_all.f' bio; |
| 282 | raise OpenSSL "Can't initialize connection") |
| 283 | else if F_OpenSSL_SML_set_conn_hostname.f' (bio, ZString.dupML' hostname) = 0 then |
| 284 | (ssl_err ("Error setting hostname: " ^ hostname); |
| 285 | F_OpenSSL_SML_free_all.f' bio; |
| 286 | raise OpenSSL "Can't set hostname") |
| 287 | else if F_OpenSSL_SML_do_connect.f' bio <= 0 then |
| 288 | (ssl_err ("Error connecting to " ^ hostname); |
| 289 | F_OpenSSL_SML_free_all.f' bio; |
| 290 | raise OpenSSL "Can't connect") |
| 291 | else |
| 292 | bio |
| 293 | end |
| 294 | |
| 295 | fun close bio = F_OpenSSL_SML_free_all.f' bio |
| 296 | |
| 297 | fun listen (context, port) = |
| 298 | let |
| 299 | val port = ZString.dupML' (Int.toString port) |
| 300 | val listener = F_OpenSSL_SML_new_accept.f' (context, port) |
| 301 | in |
| 302 | C.free' port; |
| 303 | if C.Ptr.isNull' listener then |
| 304 | (ssl_err "Null listener"; |
| 305 | raise OpenSSL "Null listener") |
| 306 | else if F_OpenSSL_SML_do_accept.f' listener <= 0 then |
| 307 | (ssl_err "Error initializing listener"; |
| 308 | close listener; |
| 309 | raise OpenSSL "Can't initialize listener") |
| 310 | else |
| 311 | listener |
| 312 | end |
| 313 | |
| 314 | val shutdown = close |
| 315 | |
| 316 | fun accept listener = |
| 317 | if F_OpenSSL_SML_do_accept.f' listener <= 0 then |
| 318 | NONE |
| 319 | else |
| 320 | let |
| 321 | val bio = F_OpenSSL_SML_pop.f' listener |
| 322 | in |
| 323 | if C.Ptr.isNull' bio then |
| 324 | (ssl_err "Null accepted"; |
| 325 | raise OpenSSL "Null accepted") |
| 326 | else if F_OpenSSL_SML_do_handshake.f' bio <= 0 then |
| 327 | (ssl_err "Handshake failed"; |
| 328 | raise OpenSSL "Handshake failed") |
| 329 | else |
| 330 | SOME bio |
| 331 | end |
| 332 | |
| 333 | fun peerCN bio = |
| 334 | let |
| 335 | val ssl = F_OpenSSL_SML_get_ssl.f' bio |
| 336 | val _ = if C.Ptr.isNull' ssl then |
| 337 | raise OpenSSL "Null SSL" |
| 338 | else |
| 339 | () |
| 340 | val subj = F_OpenSSL_SML_get_peer_name.f' ssl |
| 341 | in |
| 342 | if C.Ptr.isNull' subj then |
| 343 | raise OpenSSL "Null CN result" |
| 344 | else |
| 345 | ZString.toML' subj |
| 346 | end |
| 347 | |
| 348 | end |