J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.security.mscapi; |
| 27 | |
| 28 | import java.nio.ByteBuffer; |
| 29 | import java.security.PublicKey; |
| 30 | import java.security.PrivateKey; |
| 31 | import java.security.InvalidKeyException; |
| 32 | import java.security.InvalidParameterException; |
| 33 | import java.security.InvalidAlgorithmParameterException; |
| 34 | import java.security.NoSuchAlgorithmException; |
| 35 | import java.security.ProviderException; |
| 36 | import java.security.MessageDigest; |
| 37 | import java.security.SecureRandom; |
| 38 | import java.security.Signature; |
| 39 | import java.security.SignatureSpi; |
| 40 | import java.security.SignatureException; |
| 41 | |
| 42 | /** |
| 43 | * RSA signature implementation. Supports RSA signing using PKCS#1 v1.5 padding. |
| 44 | * |
| 45 | * Objects should be instantiated by calling Signature.getInstance() using the |
| 46 | * following algorithm names: |
| 47 | * |
| 48 | * . "SHA1withRSA" |
| 49 | * . "MD5withRSA" |
| 50 | * . "MD2withRSA" |
| 51 | * |
| 52 | * Note: RSA keys must be at least 512 bits long |
| 53 | * |
| 54 | * @since 1.6 |
| 55 | * @author Stanley Man-Kit Ho |
| 56 | */ |
| 57 | abstract class RSASignature extends java.security.SignatureSpi |
| 58 | { |
| 59 | // message digest implementation we use |
| 60 | private final MessageDigest messageDigest; |
| 61 | |
| 62 | // flag indicating whether the digest is reset |
| 63 | private boolean needsReset; |
| 64 | |
| 65 | // the signing key |
| 66 | private Key privateKey = null; |
| 67 | |
| 68 | // the verification key |
| 69 | private Key publicKey = null; |
| 70 | |
| 71 | |
| 72 | RSASignature(String digestName) { |
| 73 | |
| 74 | try { |
| 75 | messageDigest = MessageDigest.getInstance(digestName); |
| 76 | |
| 77 | } catch (NoSuchAlgorithmException e) { |
| 78 | throw new ProviderException(e); |
| 79 | } |
| 80 | |
| 81 | needsReset = false; |
| 82 | } |
| 83 | |
| 84 | public static final class SHA1 extends RSASignature { |
| 85 | public SHA1() { |
| 86 | super("SHA1"); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | public static final class MD5 extends RSASignature { |
| 91 | public MD5() { |
| 92 | super("MD5"); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | public static final class MD2 extends RSASignature { |
| 97 | public MD2() { |
| 98 | super("MD2"); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Initializes this signature object with the specified |
| 104 | * public key for verification operations. |
| 105 | * |
| 106 | * @param publicKey the public key of the identity whose signature is |
| 107 | * going to be verified. |
| 108 | * |
| 109 | * @exception InvalidKeyException if the key is improperly |
| 110 | * encoded, parameters are missing, and so on. |
| 111 | */ |
| 112 | protected void engineInitVerify(PublicKey key) |
| 113 | throws InvalidKeyException |
| 114 | { |
| 115 | // This signature accepts only RSAPublicKey |
| 116 | if ((key instanceof java.security.interfaces.RSAPublicKey) == false) { |
| 117 | throw new InvalidKeyException("Key type not supported"); |
| 118 | } |
| 119 | |
| 120 | java.security.interfaces.RSAPublicKey rsaKey = |
| 121 | (java.security.interfaces.RSAPublicKey) key; |
| 122 | |
| 123 | if ((key instanceof sun.security.mscapi.RSAPublicKey) == false) { |
| 124 | |
| 125 | // convert key to MSCAPI format |
| 126 | |
| 127 | byte[] modulusBytes = rsaKey.getModulus().toByteArray(); |
| 128 | |
| 129 | // Adjust key length due to sign bit |
| 130 | int keyBitLength = (modulusBytes[0] == 0) |
| 131 | ? (modulusBytes.length - 1) * 8 |
| 132 | : modulusBytes.length * 8; |
| 133 | |
| 134 | byte[] keyBlob = generatePublicKeyBlob( |
| 135 | keyBitLength, modulusBytes, |
| 136 | rsaKey.getPublicExponent().toByteArray()); |
| 137 | |
| 138 | publicKey = importPublicKey(keyBlob, keyBitLength); |
| 139 | |
| 140 | } else { |
| 141 | publicKey = (sun.security.mscapi.RSAPublicKey) key; |
| 142 | } |
| 143 | |
| 144 | if (needsReset) { |
| 145 | messageDigest.reset(); |
| 146 | needsReset = false; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Initializes this signature object with the specified |
| 152 | * private key for signing operations. |
| 153 | * |
| 154 | * @param privateKey the private key of the identity whose signature |
| 155 | * will be generated. |
| 156 | * |
| 157 | * @exception InvalidKeyException if the key is improperly |
| 158 | * encoded, parameters are missing, and so on. |
| 159 | */ |
| 160 | protected void engineInitSign(PrivateKey key) |
| 161 | throws InvalidKeyException |
| 162 | { |
| 163 | // This signature accepts only RSAPrivateKey |
| 164 | if ((key instanceof sun.security.mscapi.RSAPrivateKey) == false) { |
| 165 | throw new InvalidKeyException("Key type not supported"); |
| 166 | } |
| 167 | privateKey = (sun.security.mscapi.RSAPrivateKey) key; |
| 168 | |
| 169 | // Determine byte length from bit length |
| 170 | int keySize = (privateKey.bitLength() + 7) >> 3; |
| 171 | |
| 172 | if (keySize < 64) |
| 173 | throw new InvalidKeyException( |
| 174 | "RSA keys must be at least 512 bits long"); |
| 175 | |
| 176 | if (needsReset) { |
| 177 | messageDigest.reset(); |
| 178 | needsReset = false; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * Updates the data to be signed or verified |
| 184 | * using the specified byte. |
| 185 | * |
| 186 | * @param b the byte to use for the update. |
| 187 | * |
| 188 | * @exception SignatureException if the engine is not initialized |
| 189 | * properly. |
| 190 | */ |
| 191 | protected void engineUpdate(byte b) throws SignatureException |
| 192 | { |
| 193 | messageDigest.update(b); |
| 194 | needsReset = true; |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * Updates the data to be signed or verified, using the |
| 199 | * specified array of bytes, starting at the specified offset. |
| 200 | * |
| 201 | * @param b the array of bytes |
| 202 | * @param off the offset to start from in the array of bytes |
| 203 | * @param len the number of bytes to use, starting at offset |
| 204 | * |
| 205 | * @exception SignatureException if the engine is not initialized |
| 206 | * properly |
| 207 | */ |
| 208 | protected void engineUpdate(byte[] b, int off, int len) |
| 209 | throws SignatureException |
| 210 | { |
| 211 | messageDigest.update(b, off, len); |
| 212 | needsReset = true; |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * Updates the data to be signed or verified, using the |
| 217 | * specified ByteBuffer. |
| 218 | * |
| 219 | * @param input the ByteBuffer |
| 220 | */ |
| 221 | protected void engineUpdate(ByteBuffer input) |
| 222 | { |
| 223 | messageDigest.update(input); |
| 224 | needsReset = true; |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * Returns the signature bytes of all the data |
| 229 | * updated so far. |
| 230 | * The format of the signature depends on the underlying |
| 231 | * signature scheme. |
| 232 | * |
| 233 | * @return the signature bytes of the signing operation's result. |
| 234 | * |
| 235 | * @exception SignatureException if the engine is not |
| 236 | * initialized properly or if this signature algorithm is unable to |
| 237 | * process the input data provided. |
| 238 | */ |
| 239 | protected byte[] engineSign() throws SignatureException { |
| 240 | |
| 241 | byte[] hash = messageDigest.digest(); |
| 242 | needsReset = false; |
| 243 | |
| 244 | // Sign hash using MS Crypto APIs |
| 245 | |
| 246 | byte[] result = signHash(hash, hash.length, |
| 247 | messageDigest.getAlgorithm(), privateKey.getHCryptProvider(), |
| 248 | privateKey.getHCryptKey()); |
| 249 | |
| 250 | // Convert signature array from little endian to big endian |
| 251 | return convertEndianArray(result); |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * Convert array from big endian to little endian, or vice versa. |
| 256 | */ |
| 257 | private byte[] convertEndianArray(byte[] byteArray) |
| 258 | { |
| 259 | if (byteArray == null || byteArray.length == 0) |
| 260 | return byteArray; |
| 261 | |
| 262 | byte [] retval = new byte[byteArray.length]; |
| 263 | |
| 264 | // make it big endian |
| 265 | for (int i=0;i < byteArray.length;i++) |
| 266 | retval[i] = byteArray[byteArray.length - i - 1]; |
| 267 | |
| 268 | return retval; |
| 269 | } |
| 270 | |
| 271 | /** |
| 272 | * Sign hash using Microsoft Crypto API with HCRYPTKEY. |
| 273 | * The returned data is in little-endian. |
| 274 | */ |
| 275 | private native static byte[] signHash(byte[] hash, int hashSize, |
| 276 | String hashAlgorithm, long hCryptProv, long hCryptKey) |
| 277 | throws SignatureException; |
| 278 | |
| 279 | /** |
| 280 | * Verify a signed hash using Microsoft Crypto API with HCRYPTKEY. |
| 281 | */ |
| 282 | private native static boolean verifySignedHash(byte[] hash, int hashSize, |
| 283 | String hashAlgorithm, byte[] signature, int signatureSize, |
| 284 | long hCryptProv, long hCryptKey) throws SignatureException; |
| 285 | |
| 286 | /** |
| 287 | * Verifies the passed-in signature. |
| 288 | * |
| 289 | * @param sigBytes the signature bytes to be verified. |
| 290 | * |
| 291 | * @return true if the signature was verified, false if not. |
| 292 | * |
| 293 | * @exception SignatureException if the engine is not |
| 294 | * initialized properly, the passed-in signature is improperly |
| 295 | * encoded or of the wrong type, if this signature algorithm is unable to |
| 296 | * process the input data provided, etc. |
| 297 | */ |
| 298 | protected boolean engineVerify(byte[] sigBytes) |
| 299 | throws SignatureException |
| 300 | { |
| 301 | byte[] hash = messageDigest.digest(); |
| 302 | needsReset = false; |
| 303 | |
| 304 | return verifySignedHash(hash, hash.length, |
| 305 | messageDigest.getAlgorithm(), convertEndianArray(sigBytes), |
| 306 | sigBytes.length, publicKey.getHCryptProvider(), |
| 307 | publicKey.getHCryptKey()); |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * Sets the specified algorithm parameter to the specified |
| 312 | * value. This method supplies a general-purpose mechanism through |
| 313 | * which it is possible to set the various parameters of this object. |
| 314 | * A parameter may be any settable parameter for the algorithm, such as |
| 315 | * a parameter size, or a source of random bits for signature generation |
| 316 | * (if appropriate), or an indication of whether or not to perform |
| 317 | * a specific but optional computation. A uniform algorithm-specific |
| 318 | * naming scheme for each parameter is desirable but left unspecified |
| 319 | * at this time. |
| 320 | * |
| 321 | * @param param the string identifier of the parameter. |
| 322 | * |
| 323 | * @param value the parameter value. |
| 324 | * |
| 325 | * @exception InvalidParameterException if <code>param</code> is an |
| 326 | * invalid parameter for this signature algorithm engine, |
| 327 | * the parameter is already set |
| 328 | * and cannot be set again, a security exception occurs, and so on. |
| 329 | * |
| 330 | * @deprecated Replaced by {@link |
| 331 | * #engineSetParameter(java.security.spec.AlgorithmParameterSpec) |
| 332 | * engineSetParameter}. |
| 333 | */ |
| 334 | protected void engineSetParameter(String param, Object value) |
| 335 | throws InvalidParameterException |
| 336 | { |
| 337 | throw new InvalidParameterException("Parameter not supported"); |
| 338 | } |
| 339 | |
| 340 | |
| 341 | /** |
| 342 | * Gets the value of the specified algorithm parameter. |
| 343 | * This method supplies a general-purpose mechanism through which it |
| 344 | * is possible to get the various parameters of this object. A parameter |
| 345 | * may be any settable parameter for the algorithm, such as a parameter |
| 346 | * size, or a source of random bits for signature generation (if |
| 347 | * appropriate), or an indication of whether or not to perform a |
| 348 | * specific but optional computation. A uniform algorithm-specific |
| 349 | * naming scheme for each parameter is desirable but left unspecified |
| 350 | * at this time. |
| 351 | * |
| 352 | * @param param the string name of the parameter. |
| 353 | * |
| 354 | * @return the object that represents the parameter value, or null if |
| 355 | * there is none. |
| 356 | * |
| 357 | * @exception InvalidParameterException if <code>param</code> is an |
| 358 | * invalid parameter for this engine, or another exception occurs while |
| 359 | * trying to get this parameter. |
| 360 | * |
| 361 | * @deprecated |
| 362 | */ |
| 363 | protected Object engineGetParameter(String param) |
| 364 | throws InvalidParameterException |
| 365 | { |
| 366 | throw new InvalidParameterException("Parameter not supported"); |
| 367 | } |
| 368 | |
| 369 | /** |
| 370 | * Generates a public-key BLOB from a key's components. |
| 371 | */ |
| 372 | private native byte[] generatePublicKeyBlob( |
| 373 | int keyBitLength, byte[] modulus, byte[] publicExponent); |
| 374 | |
| 375 | /** |
| 376 | * Imports a public-key BLOB. |
| 377 | */ |
| 378 | private native RSAPublicKey importPublicKey(byte[] keyBlob, int keySize); |
| 379 | } |