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| 1 | +/* | |
| 2 | + * Copyright (c) 1996, 2002, Oracle and/or its affiliates. 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | + | |
| 27 | +package sun.security.pkcs; | |
| 28 | + | |
| 29 | +import java.io.ByteArrayOutputStream; | |
| 30 | +import java.io.PrintStream; | |
| 31 | +import java.io.IOException; | |
| 32 | +import java.math.BigInteger; | |
| 33 | + | |
| 34 | +import java.security.cert.CertificateException; | |
| 35 | +import java.security.NoSuchAlgorithmException; | |
| 36 | +import java.security.InvalidKeyException; | |
| 37 | +import java.security.Signature; | |
| 38 | +import java.security.SignatureException; | |
| 39 | +import java.security.PublicKey; | |
| 40 | + | |
| 41 | +import sun.misc.BASE64Encoder; | |
| 42 | + | |
| 43 | +import sun.security.util.*; | |
| 44 | +import sun.security.x509.AlgorithmId; | |
| 45 | +import sun.security.x509.X509Key; | |
| 46 | +import sun.security.x509.X500Name; | |
| 47 | + | |
| 48 | +/** | |
| 49 | + * A PKCS #10 certificate request is created and sent to a Certificate | |
| 50 | + * Authority, which then creates an X.509 certificate and returns it to | |
| 51 | + * the entity that requested it. A certificate request basically consists | |
| 52 | + * of the subject's X.500 name, public key, and optionally some attributes, | |
| 53 | + * signed using the corresponding private key. | |
| 54 | + * | |
| 55 | + * The ASN.1 syntax for a Certification Request is: | |
| 56 | + * <pre> | |
| 57 | + * CertificationRequest ::= SEQUENCE { | |
| 58 | + * certificationRequestInfo CertificationRequestInfo, | |
| 59 | + * signatureAlgorithm SignatureAlgorithmIdentifier, | |
| 60 | + * signature Signature | |
| 61 | + * } | |
| 62 | + * | |
| 63 | + * SignatureAlgorithmIdentifier ::= AlgorithmIdentifier | |
| 64 | + * Signature ::= BIT STRING | |
| 65 | + * | |
| 66 | + * CertificationRequestInfo ::= SEQUENCE { | |
| 67 | + * version Version, | |
| 68 | + * subject Name, | |
| 69 | + * subjectPublicKeyInfo SubjectPublicKeyInfo, | |
| 70 | + * attributes [0] IMPLICIT Attributes | |
| 71 | + * } | |
| 72 | + * Attributes ::= SET OF Attribute | |
| 73 | + * </pre> | |
| 74 | + * | |
| 75 | + * @author David Brownell | |
| 76 | + * @author Amit Kapoor | |
| 77 | + * @author Hemma Prafullchandra | |
| 78 | + */ | |
| 79 | +public class PKCS10 { | |
| 80 | + /** | |
| 81 | + * Constructs an unsigned PKCS #10 certificate request. Before this | |
| 82 | + * request may be used, it must be encoded and signed. Then it | |
| 83 | + * must be retrieved in some conventional format (e.g. string). | |
| 84 | + * | |
| 85 | + * @param publicKey the public key that should be placed | |
| 86 | + * into the certificate generated by the CA. | |
| 87 | + */ | |
| 88 | + public PKCS10(PublicKey publicKey) { | |
| 89 | + subjectPublicKeyInfo = publicKey; | |
| 90 | + attributeSet = new PKCS10Attributes(); | |
| 91 | + } | |
| 92 | + | |
| 93 | + /** | |
| 94 | + * Constructs an unsigned PKCS #10 certificate request. Before this | |
| 95 | + * request may be used, it must be encoded and signed. Then it | |
| 96 | + * must be retrieved in some conventional format (e.g. string). | |
| 97 | + * | |
| 98 | + * @param publicKey the public key that should be placed | |
| 99 | + * into the certificate generated by the CA. | |
| 100 | + * @param attributes additonal set of PKCS10 attributes requested | |
| 101 | + * for in the certificate. | |
| 102 | + */ | |
| 103 | + public PKCS10(PublicKey publicKey, PKCS10Attributes attributes) { | |
| 104 | + subjectPublicKeyInfo = publicKey; | |
| 105 | + attributeSet = attributes; | |
| 106 | + } | |
| 107 | + | |
| 108 | + /** | |
| 109 | + * Parses an encoded, signed PKCS #10 certificate request, verifying | |
| 110 | + * the request's signature as it does so. This constructor would | |
| 111 | + * typically be used by a Certificate Authority, from which a new | |
| 112 | + * certificate would then be constructed. | |
| 113 | + * | |
| 114 | + * @param data the DER-encoded PKCS #10 request. | |
| 115 | + * @exception IOException for low level errors reading the data | |
| 116 | + * @exception SignatureException when the signature is invalid | |
| 117 | + * @exception NoSuchAlgorithmException when the signature | |
| 118 | + * algorithm is not supported in this environment | |
| 119 | + */ | |
| 120 | + public PKCS10(byte[] data) | |
| 121 | + throws IOException, SignatureException, NoSuchAlgorithmException { | |
| 122 | + DerInputStream in; | |
| 123 | + DerValue[] seq; | |
| 124 | + AlgorithmId id; | |
| 125 | + byte[] sigData; | |
| 126 | + Signature sig; | |
| 127 | + | |
| 128 | + encoded = data; | |
| 129 | + | |
| 130 | + // | |
| 131 | + // Outer sequence: request, signature algorithm, signature. | |
| 132 | + // Parse, and prepare to verify later. | |
| 133 | + // | |
| 134 | + in = new DerInputStream(data); | |
| 135 | + seq = in.getSequence(3); | |
| 136 | + | |
| 137 | + if (seq.length != 3) | |
| 138 | + throw new IllegalArgumentException("not a PKCS #10 request"); | |
| 139 | + | |
| 140 | + data = seq[0].toByteArray(); // reusing this variable | |
| 141 | + id = AlgorithmId.parse(seq[1]); | |
| 142 | + sigData = seq[2].getBitString(); | |
| 143 | + | |
| 144 | + // | |
| 145 | + // Inner sequence: version, name, key, attributes | |
| 146 | + // | |
| 147 | + BigInteger serial; | |
| 148 | + DerValue val; | |
| 149 | + | |
| 150 | + serial = seq[0].data.getBigInteger(); | |
| 151 | + if (!serial.equals(BigInteger.ZERO)) | |
| 152 | + throw new IllegalArgumentException("not PKCS #10 v1"); | |
| 153 | + | |
| 154 | + subject = new X500Name(seq[0].data); | |
| 155 | + subjectPublicKeyInfo = X509Key.parse(seq[0].data.getDerValue()); | |
| 156 | + | |
| 157 | + // Cope with a somewhat common illegal PKCS #10 format | |
| 158 | + if (seq[0].data.available() != 0) | |
| 159 | + attributeSet = new PKCS10Attributes(seq[0].data); | |
| 160 | + else | |
| 161 | + attributeSet = new PKCS10Attributes(); | |
| 162 | + | |
| 163 | + if (seq[0].data.available() != 0) | |
| 164 | + throw new IllegalArgumentException("illegal PKCS #10 data"); | |
| 165 | + | |
| 166 | + // | |
| 167 | + // OK, we parsed it all ... validate the signature using the | |
| 168 | + // key and signature algorithm we found. | |
| 169 | + // | |
| 170 | + try { | |
| 171 | + sig = Signature.getInstance(id.getName()); | |
| 172 | + sig.initVerify(subjectPublicKeyInfo); | |
| 173 | + sig.update(data); | |
| 174 | + if (!sig.verify(sigData)) | |
| 175 | + throw new SignatureException("Invalid PKCS #10 signature"); | |
| 176 | + } catch (InvalidKeyException e) { | |
| 177 | + throw new SignatureException("invalid key"); | |
| 178 | + } | |
| 179 | + } | |
| 180 | + | |
| 181 | + /** | |
| 182 | + * Create the signed certificate request. This will later be | |
| 183 | + * retrieved in either string or binary format. | |
| 184 | + * | |
| 185 | + * @param subject identifies the signer (by X.500 name). | |
| 186 | + * @param signature private key and signing algorithm to use. | |
| 187 | + * @exception IOException on errors. | |
| 188 | + * @exception CertificateException on certificate handling errors. | |
| 189 | + * @exception SignatureException on signature handling errors. | |
| 190 | + */ | |
| 191 | + public void encodeAndSign(X500Name subject, Signature signature) | |
| 192 | + throws CertificateException, IOException, SignatureException { | |
| 193 | + DerOutputStream out, scratch; | |
| 194 | + byte[] certificateRequestInfo; | |
| 195 | + byte[] sig; | |
| 196 | + | |
| 197 | + if (encoded != null) | |
| 198 | + throw new SignatureException("request is already signed"); | |
| 199 | + | |
| 200 | + this.subject = subject; | |
| 201 | + | |
| 202 | + /* | |
| 203 | + * Encode cert request info, wrap in a sequence for signing | |
| 204 | + */ | |
| 205 | + scratch = new DerOutputStream(); | |
| 206 | + scratch.putInteger(BigInteger.ZERO); // PKCS #10 v1.0 | |
| 207 | + subject.encode(scratch); // X.500 name | |
| 208 | + scratch.write(subjectPublicKeyInfo.getEncoded()); // public key | |
| 209 | + attributeSet.encode(scratch); | |
| 210 | + | |
| 211 | + out = new DerOutputStream(); | |
| 212 | + out.write(DerValue.tag_Sequence, scratch); // wrap it! | |
| 213 | + certificateRequestInfo = out.toByteArray(); | |
| 214 | + scratch = out; | |
| 215 | + | |
| 216 | + /* | |
| 217 | + * Sign it ... | |
| 218 | + */ | |
| 219 | + signature.update(certificateRequestInfo, 0, | |
| 220 | + certificateRequestInfo.length); | |
| 221 | + sig = signature.sign(); | |
| 222 | + | |
| 223 | + /* | |
| 224 | + * Build guts of SIGNED macro | |
| 225 | + */ | |
| 226 | + AlgorithmId algId = null; | |
| 227 | + try { | |
| 228 | + algId = AlgorithmId.getAlgorithmId(signature.getAlgorithm()); | |
| 229 | + } catch (NoSuchAlgorithmException nsae) { | |
| 230 | + throw new SignatureException(nsae); | |
| 231 | + } | |
| 232 | + algId.encode(scratch); // sig algorithm | |
| 233 | + scratch.putBitString(sig); // sig | |
| 234 | + | |
| 235 | + /* | |
| 236 | + * Wrap those guts in a sequence | |
| 237 | + */ | |
| 238 | + out = new DerOutputStream(); | |
| 239 | + out.write(DerValue.tag_Sequence, scratch); | |
| 240 | + encoded = out.toByteArray(); | |
| 241 | + } | |
| 242 | + | |
| 243 | + /** | |
| 244 | + * Returns the subject's name. | |
| 245 | + */ | |
| 246 | + public X500Name getSubjectName() { return subject; } | |
| 247 | + | |
| 248 | + /** | |
| 249 | + * Returns the subject's public key. | |
| 250 | + */ | |
| 251 | + public PublicKey getSubjectPublicKeyInfo() | |
| 252 | + { return subjectPublicKeyInfo; } | |
| 253 | + | |
| 254 | + /** | |
| 255 | + * Returns the additional attributes requested. | |
| 256 | + */ | |
| 257 | + public PKCS10Attributes getAttributes() | |
| 258 | + { return attributeSet; } | |
| 259 | + | |
| 260 | + /** | |
| 261 | + * Returns the encoded and signed certificate request as a | |
| 262 | + * DER-encoded byte array. | |
| 263 | + * | |
| 264 | + * @return the certificate request, or null if encodeAndSign() | |
| 265 | + * has not yet been called. | |
| 266 | + */ | |
| 267 | + public byte[] getEncoded() { | |
| 268 | + if (encoded != null) | |
| 269 | + return encoded.clone(); | |
| 270 | + else | |
| 271 | + return null; | |
| 272 | + } | |
| 273 | + | |
| 274 | + /** | |
| 275 | + * Prints an E-Mailable version of the certificate request on the print | |
| 276 | + * stream passed. The format is a common base64 encoded one, supported | |
| 277 | + * by most Certificate Authorities because Netscape web servers have | |
| 278 | + * used this for some time. Some certificate authorities expect some | |
| 279 | + * more information, in particular contact information for the web | |
| 280 | + * server administrator. | |
| 281 | + * | |
| 282 | + * @param out the print stream where the certificate request | |
| 283 | + * will be printed. | |
| 284 | + * @exception IOException when an output operation failed | |
| 285 | + * @exception SignatureException when the certificate request was | |
| 286 | + * not yet signed. | |
| 287 | + */ | |
| 288 | + public void print(PrintStream out) | |
| 289 | + throws IOException, SignatureException { | |
| 290 | + if (encoded == null) | |
| 291 | + throw new SignatureException("Cert request was not signed"); | |
| 292 | + | |
| 293 | + BASE64Encoder encoder = new BASE64Encoder(); | |
| 294 | + | |
| 295 | + out.println("-----BEGIN NEW CERTIFICATE REQUEST-----"); | |
| 296 | + encoder.encodeBuffer(encoded, out); | |
| 297 | + out.println("-----END NEW CERTIFICATE REQUEST-----"); | |
| 298 | + } | |
| 299 | + | |
| 300 | + /** | |
| 301 | + * Provides a short description of this request. | |
| 302 | + */ | |
| 303 | + public String toString() { | |
| 304 | + return "[PKCS #10 certificate request:\n" | |
| 305 | + + subjectPublicKeyInfo.toString() | |
| 306 | + + " subject: <" + subject + ">" + "\n" | |
| 307 | + + " attributes: " + attributeSet.toString() | |
| 308 | + + "\n]"; | |
| 309 | + } | |
| 310 | + | |
| 311 | + /** | |
| 312 | + * Compares this object for equality with the specified | |
| 313 | + * object. If the <code>other</code> object is an | |
| 314 | + * <code>instanceof</code> <code>PKCS10</code>, then | |
| 315 | + * its encoded form is retrieved and compared with the | |
| 316 | + * encoded form of this certificate request. | |
| 317 | + * | |
| 318 | + * @param other the object to test for equality with this object. | |
| 319 | + * @return true iff the encoded forms of the two certificate | |
| 320 | + * requests match, false otherwise. | |
| 321 | + */ | |
| 322 | + public boolean equals(Object other) { | |
| 323 | + if (this == other) | |
| 324 | + return true; | |
| 325 | + if (!(other instanceof PKCS10)) | |
| 326 | + return false; | |
| 327 | + if (encoded == null) // not signed yet | |
| 328 | + return false; | |
| 329 | + byte[] otherEncoded = ((PKCS10)other).getEncoded(); | |
| 330 | + if (otherEncoded == null) | |
| 331 | + return false; | |
| 332 | + | |
| 333 | + return java.util.Arrays.equals(encoded, otherEncoded); | |
| 334 | + } | |
| 335 | + | |
| 336 | + /** | |
| 337 | + * Returns a hashcode value for this certificate request from its | |
| 338 | + * encoded form. | |
| 339 | + * | |
| 340 | + * @return the hashcode value. | |
| 341 | + */ | |
| 342 | + public int hashCode() { | |
| 343 | + int retval = 0; | |
| 344 | + if (encoded != null) | |
| 345 | + for (int i = 1; i < encoded.length; i++) | |
| 346 | + retval += encoded[i] * i; | |
| 347 | + return(retval); | |
| 348 | + } | |
| 349 | + | |
| 350 | + private X500Name subject; | |
| 351 | + private PublicKey subjectPublicKeyInfo; | |
| 352 | + private PKCS10Attributes attributeSet; | |
| 353 | + private byte[] encoded; // signed | |
| 354 | +} | |