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Diffstat (limited to 'libjava/gnu/java/security/der/DERReader.java')
| -rw-r--r-- | libjava/gnu/java/security/der/DERReader.java | 437 |
1 files changed, 0 insertions, 437 deletions
diff --git a/libjava/gnu/java/security/der/DERReader.java b/libjava/gnu/java/security/der/DERReader.java deleted file mode 100644 index cb07f14325f..00000000000 --- a/libjava/gnu/java/security/der/DERReader.java +++ /dev/null @@ -1,437 +0,0 @@ -/* DERReader.java -- parses ASN.1 DER sequences - Copyright (C) 2003 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package gnu.java.security.der; - -import gnu.java.security.OID; - -import java.io.BufferedInputStream; -import java.io.ByteArrayInputStream; -import java.io.ByteArrayOutputStream; -import java.io.EOFException; -import java.io.IOException; -import java.io.InputStream; -import java.math.BigInteger; -import java.util.Calendar; -import java.util.Date; -import java.util.TimeZone; - -/** - * This class decodes DER sequences into Java objects. The methods of - * this class do not have knowledge of higher-levels of structure in the - * DER stream -- such as ASN.1 constructions -- and it is therefore up - * to the calling application to determine if the data are structured - * properly by inspecting the {@link DERValue} that is returned. - * - * @author Casey Marshall (csm@gnu.org) - */ -public class DERReader implements DER -{ - - // Fields. - // ------------------------------------------------------------------------ - - protected InputStream in; - - protected final ByteArrayOutputStream encBuf; - - // Constructor. - // ------------------------------------------------------------------------ - - /** - * Create a new DER reader from a byte array. - * - * @param in The encoded bytes. - */ - public DERReader(byte[] in) - { - this(new ByteArrayInputStream(in)); - } - - public DERReader (byte[] in, int off, int len) - { - this (new ByteArrayInputStream (in, off, len)); - } - - /** - * Create a new DER readed from an input stream. - * - * @param in The encoded bytes. - */ - public DERReader(InputStream in) - { - if (!in.markSupported()) - this.in = new BufferedInputStream(in, 16384); - else - this.in = in; - encBuf = new ByteArrayOutputStream(2048); - } - - // Class methods. - // ------------------------------------------------------------------------ - - /** - * Convenience method for reading a single primitive value from the - * given byte array. - * - * @param encoded The encoded bytes. - * @throws IOException If the bytes do not represent an encoded - * object. - */ - public static DERValue read(byte[] encoded) throws IOException - { - return new DERReader(encoded).read(); - } - - // Instance methods. - // ------------------------------------------------------------------------ - - public void skip (int bytes) throws IOException - { - in.skip (bytes); - } - - /** - * Decode a single value from the input stream, returning it in a new - * {@link DERValue}. By "single value" we mean any single type in its - * entirety -- including constructed types such as SEQUENCE and all - * the values they contain. Usually it is sufficient to call this - * method once to parse and return the top-level structure, then to - * inspect the returned value for the proper contents. - * - * @return The parsed DER structure. - * @throws IOException If an error occurs reading from the input - * stream. - * @throws DEREncodingException If the input does not represent a - * valid DER stream. - */ - public DERValue read() throws IOException - { - int tag = in.read(); - if (tag == -1) - throw new EOFException(); - encBuf.write(tag); - int len = readLength(); - DERValue value = null; - if ((tag & CONSTRUCTED) == CONSTRUCTED) - { - in.mark(2048); - byte[] encoded = new byte[len]; - in.read(encoded); - encBuf.write(encoded); - value = new DERValue(tag, len, CONSTRUCTED_VALUE, encBuf.toByteArray()); - in.reset(); - encBuf.reset(); - return value; - } - switch (tag & 0xC0) - { - case UNIVERSAL: - value = new DERValue(tag, len, readUniversal(tag, len), - encBuf.toByteArray()); - encBuf.reset(); - break; - case CONTEXT: - byte[] encoded = new byte[len]; - in.read(encoded); - encBuf.write(encoded); - value = new DERValue(tag, len, encoded, encBuf.toByteArray()); - encBuf.reset(); - break; - case APPLICATION: - // This should not be reached, since (I think) APPLICATION is - // always constructed. - throw new DEREncodingException("non-constructed APPLICATION data"); - default: - throw new DEREncodingException("PRIVATE class not supported"); - } - return value; - } - - protected int readLength() throws IOException - { - int i = in.read(); - if (i == -1) - throw new EOFException(); - encBuf.write(i); - if ((i & ~0x7F) == 0) - { - return i; - } - else if (i < 0xFF) - { - byte[] octets = new byte[i & 0x7F]; - in.read(octets); - encBuf.write(octets); - return new BigInteger(1, octets).intValue(); - } - throw new DEREncodingException(); - } - - // Own methods. - // ------------------------------------------------------------------------ - - private Object readUniversal(int tag, int len) throws IOException - { - byte[] value = new byte[len]; - in.read(value); - encBuf.write(value); - switch (tag & 0x1F) - { - case BOOLEAN: - if (value.length != 1) - throw new DEREncodingException(); - return Boolean.valueOf(value[0] != 0); - case NULL: - if (len != 0) - throw new DEREncodingException(); - return null; - case INTEGER: - case ENUMERATED: - return new BigInteger(value); - case BIT_STRING: - byte[] bits = new byte[len - 1]; - System.arraycopy(value, 1, bits, 0, bits.length); - return new BitString(bits, value[0] & 0xFF); - case OCTET_STRING: - return value; - case NUMERIC_STRING: - case PRINTABLE_STRING: - case T61_STRING: - case VIDEOTEX_STRING: - case IA5_STRING: - case GRAPHIC_STRING: - case ISO646_STRING: - case GENERAL_STRING: - case UNIVERSAL_STRING: - case BMP_STRING: - case UTF8_STRING: - return makeString(tag, value); - case UTC_TIME: - case GENERALIZED_TIME: - return makeTime(tag, value); - case OBJECT_IDENTIFIER: - return new OID(value); - case RELATIVE_OID: - return new OID(value, true); - default: - throw new DEREncodingException("unknown tag " + tag); - } - } - - private static String makeString(int tag, byte[] value) - throws IOException - { - switch (tag & 0x1F) - { - case NUMERIC_STRING: - case PRINTABLE_STRING: - case T61_STRING: - case VIDEOTEX_STRING: - case IA5_STRING: - case GRAPHIC_STRING: - case ISO646_STRING: - case GENERAL_STRING: - return fromIso88591(value); - - case UNIVERSAL_STRING: - // XXX The docs say UniversalString is encoded in four bytes - // per character, but Java has no support (yet) for UTF-32. - //return new String(buf, "UTF-32"); - case BMP_STRING: - return fromUtf16Be(value); - - case UTF8_STRING: - return fromUtf8(value); - - default: - throw new DEREncodingException("unknown string tag"); - } - } - - private static String fromIso88591(byte[] bytes) - { - StringBuffer str = new StringBuffer(bytes.length); - for (int i = 0; i < bytes.length; i++) - str.append((char) (bytes[i] & 0xFF)); - return str.toString(); - } - - private static String fromUtf16Be(byte[] bytes) throws IOException - { - if ((bytes.length & 0x01) != 0) - throw new IOException("UTF-16 bytes are odd in length"); - StringBuffer str = new StringBuffer(bytes.length / 2); - for (int i = 0; i < bytes.length; i += 2) - { - char c = (char) ((bytes[i] << 8) & 0xFF); - c |= (char) (bytes[i+1] & 0xFF); - str.append(c); - } - return str.toString(); - } - - private static String fromUtf8(byte[] bytes) throws IOException - { - StringBuffer str = new StringBuffer((int)(bytes.length / 1.5)); - for (int i = 0; i < bytes.length; ) - { - char c = 0; - if ((bytes[i] & 0xE0) == 0xE0) - { - if ((i + 2) >= bytes.length) - throw new IOException("short UTF-8 input"); - c = (char) ((bytes[i++] & 0x0F) << 12); - if ((bytes[i] & 0x80) != 0x80) - throw new IOException("malformed UTF-8 input"); - c |= (char) ((bytes[i++] & 0x3F) << 6); - if ((bytes[i] & 0x80) != 0x80) - throw new IOException("malformed UTF-8 input"); - c |= (char) (bytes[i++] & 0x3F); - } - else if ((bytes[i] & 0xC0) == 0xC0) - { - if ((i + 1) >= bytes.length) - throw new IOException("short input"); - c = (char) ((bytes[i++] & 0x1F) << 6); - if ((bytes[i] & 0x80) != 0x80) - throw new IOException("malformed UTF-8 input"); - c |= (char) (bytes[i++] & 0x3F); - } - else if ((bytes[i] & 0xFF) < 0x80) - { - c = (char) (bytes[i++] & 0xFF); - } - else - throw new IOException("badly formed UTF-8 sequence"); - str.append(c); - } - return str.toString(); - } - - private Date makeTime(int tag, byte[] value) throws IOException - { - Calendar calendar = Calendar.getInstance(); - String str = makeString(PRINTABLE_STRING, value); - - // Classpath's SimpleDateFormat does not work for parsing these - // types of times, so we do this by hand. - String date = str; - String tz = ""; - if (str.indexOf("+") > 0) - { - date = str.substring(0, str.indexOf("+")); - tz = str.substring(str.indexOf("+")); - } - else if (str.indexOf("-") > 0) - { - date = str.substring(0, str.indexOf("-")); - tz = str.substring(str.indexOf("-")); - } - else if (str.endsWith("Z")) - { - date = str.substring(0, str.length()-2); - tz = "Z"; - } - if (!tz.equals("Z") && tz.length() > 0) - calendar.setTimeZone(TimeZone.getTimeZone(tz)); - else - calendar.setTimeZone(TimeZone.getTimeZone("UTC")); - if ((tag & 0x1F) == UTC_TIME) - { - if (date.length() < 10) // must be at least 10 chars long - throw new DEREncodingException("cannot parse date"); - // UTCTime is of the form "yyMMddHHmm[ss](Z|(+|-)hhmm)" - try - { - int year = Integer.parseInt(str.substring(0, 2)); - if (year < 50) - year += 2000; - else - year += 1900; - calendar.set(year, - Integer.parseInt(str.substring( 2, 4))-1, // month - Integer.parseInt(str.substring( 4, 6)), // day - Integer.parseInt(str.substring( 6, 8)), // hour - Integer.parseInt(str.substring( 8, 10))); // minute - if (date.length() == 12); - calendar.set(Calendar.SECOND, - Integer.parseInt(str.substring(10, 12))); - } - catch (NumberFormatException nfe) - { - throw new DEREncodingException("cannot parse date"); - } - } - else - { - if (date.length() < 10) // must be at least 10 chars long - throw new DEREncodingException("cannot parse date"); - // GeneralTime is of the form "yyyyMMddHH[mm[ss[(.|,)SSSS]]]" - // followed by "Z" or "(+|-)hh[mm]" - try - { - calendar.set( - Integer.parseInt(date.substring(0, 4)), // year - Integer.parseInt(date.substring(4, 6))-1, // month - Integer.parseInt(date.substring(6, 8)), // day - Integer.parseInt(date.substring(8, 10)), 0); // hour, min - switch (date.length()) - { - case 19: - case 18: - case 17: - case 16: - calendar.set(Calendar.MILLISECOND, - Integer.parseInt(date.substring(15))); - case 14: - calendar.set(Calendar.SECOND, - Integer.parseInt(date.substring(12, 14))); - case 12: - calendar.set(Calendar.MINUTE, - Integer.parseInt(date.substring(10, 12))); - } - } - catch (NumberFormatException nfe) - { - throw new DEREncodingException("cannot parse date"); - } - } - return calendar.getTime(); - } -} |
