From cc9a121f2e9edf3a2a69594c2a5deded14509f41 Mon Sep 17 00:00:00 2001 From: ferbas Date: Fri, 13 Nov 2009 13:00:58 +0000 Subject: baik: timestamp, /alg git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@407 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c --- .../wag/egov/egiz/pdf/BinarySignature.java | 136 ++++++++++++++++++++- 1 file changed, 133 insertions(+), 3 deletions(-) (limited to 'src/main/java/at/knowcenter') diff --git a/src/main/java/at/knowcenter/wag/egov/egiz/pdf/BinarySignature.java b/src/main/java/at/knowcenter/wag/egov/egiz/pdf/BinarySignature.java index 24840e6..d0cd951 100644 --- a/src/main/java/at/knowcenter/wag/egov/egiz/pdf/BinarySignature.java +++ b/src/main/java/at/knowcenter/wag/egov/egiz/pdf/BinarySignature.java @@ -34,6 +34,7 @@ import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; +import at.gv.egiz.pdfas.api.timestamp.TimeStamper; import at.gv.egiz.pdfas.exceptions.ErrorCode; import at.gv.egiz.pdfas.exceptions.pdf.CaptionNotFoundException; import at.gv.egiz.pdfas.exceptions.pdf.KZSettingNotFoundException; @@ -94,6 +95,11 @@ public abstract class BinarySignature * The number of bytes left out for the certificate placeholder. */ public static final int CERTIFICATE_PLACEHOLDER_LENGTH = 10000; + + /** + * The number of bytes left out for the timestamp placeholder. + */ + public static final int TIMESTAMP_PLACEHOLDER_LENGTH = 5000; /** * The placeholder character used to fill out Strings in the layout process. @@ -135,6 +141,11 @@ public abstract class BinarySignature * The SIG_ID brev. */ public static final byte[] BREV_SID = { 's', 'i', 'd' }; + + /** + * The SIG_ALG brev. + */ + public static final byte[] BREV_ALG = { 'a', 'l', 'g' }; /** * No explicit encoding. @@ -194,6 +205,11 @@ public abstract class BinarySignature * The PdfName of the certificate array. */ public static final PdfName EGIZ_CERTIFICATE_NAME = new PdfName("Cert"); + + /** + * The PdfName of the Timestamp + */ + public static final PdfName EGIZ_TIMESTAMP_NAME = new PdfName("TimeStamp"); /** * The PdfName of the data array that contains various egiz-dict data. @@ -700,6 +716,26 @@ public abstract class BinarySignature } return certLen; } + + protected static int getTimestampPlaceholderLength(IncrementalUpdateInformation iui) throws SettingNotFoundException + { + SettingsReader settings; + try + { + settings = SettingsReader.getInstance(); + } + catch (SettingsException e) + { + throw new SettingNotFoundException(e); + } + String phLen = SignatureTypeDefinition.readPhLenStringFromSettings(settings, iui.signProfile, "timestamp"); + int tsLen = TIMESTAMP_PLACEHOLDER_LENGTH; + if (phLen != null) + { + tsLen = Integer.parseInt(phLen); + } + return tsLen; + } /** * Signs a document with the given signature table using the Incremental @@ -739,7 +775,7 @@ public abstract class BinarySignature * Forwarded exception. */ public static IncrementalUpdateInformation writeIncrementalUpdate(PdfDataSource original_document, DataSink written_pdf, PdfPTable pdf_table, String profile, PositioningInstruction pi, - List variable_field_definitions, List all_field_definitions, List invisible_field_definitions, String invisibleKZString) throws PresentableException + List variable_field_definitions, List all_field_definitions, List invisible_field_definitions, String invisibleKZString, TimeStamper timeStamper) throws PresentableException { try { @@ -747,6 +783,7 @@ public abstract class BinarySignature iui.original_document = original_document; iui.start_index = original_document.getLength(); iui.signProfile = profile; + iui.timeStamper = timeStamper; Document.compress = false; @@ -940,6 +977,10 @@ public abstract class BinarySignature int num_holes = num_replaces + 1 + 1; // +1 = the /encodings hole // +1 = the /Cert + // +1 = the /Timestamp + if (iui.timeStamper != null) { + num_holes += 1; + } boolean has_hidden_variable_fields = invisible_field_definitions != null && !invisible_field_definitions.isEmpty(); if (has_hidden_variable_fields) { @@ -966,6 +1007,12 @@ public abstract class BinarySignature // /encodings replaces_array.add(new PdfName(new String(BREV_NIL, "US-ASCII"))); // the // /Cert + + if (iui.timeStamper != null) { + encodings_array.add(new PdfName(new String(ENCODING_NIL))); // the /Timestamp + replaces_array.add(new PdfName(new String(BREV_NIL, "US-ASCII"))); // the /timestamp + + } // hidden replaces List hidden_replaces = null; @@ -1022,6 +1069,21 @@ public abstract class BinarySignature PdfString cert_placeholder = new PdfString(cert_bytes); cert_array.add(cert_placeholder); egiz_dict.put(EGIZ_CERTIFICATE_NAME, cert_array); + + // Timestamp + if (iui.timeStamper != null) { + // only if handler is available + PdfArray timestamp_array = new PdfArray(); + iui.timestamp_length = getTimestampPlaceholderLength(iui); + byte[] timestamp_bytes = new byte[iui.timestamp_length]; + for (int i = 0; i < timestamp_bytes.length; i++) + { + timestamp_bytes[i] = 0; + } + PdfString timestamp_placeholder = new PdfString(timestamp_bytes); + timestamp_array.add(timestamp_placeholder); + egiz_dict.put(EGIZ_TIMESTAMP_NAME, timestamp_array); + } // /Data array with hidden information @@ -1102,6 +1164,11 @@ public abstract class BinarySignature { return BREV_SID; } + if (type.equals(SignatureTypes.SIG_ALG)) + { + return BREV_ALG; + } + return BREV_NIL; } @@ -1157,19 +1224,34 @@ public abstract class BinarySignature byte[] cert_bytes = cert_str.getBytes("US-ASCII"); int cert_index = ByteArrayUtils.indexOf(signed_pdf, obj_start, cert_bytes); int cert_start = cert_index + cert_bytes.length; + + //Timestamp + int timestamp_index = 0; + int timestamp_start = 0; + if (iui.timeStamper != null) { + String timestamp_str = "/TimeStamp[("; + byte[] timestamp_bytes = timestamp_str.getBytes("US-ASCII"); + timestamp_index = ByteArrayUtils.indexOf(signed_pdf, obj_start, timestamp_bytes); + timestamp_start = timestamp_index + timestamp_bytes.length; + } replaceNumber(signed_pdf, ods_start, signed_pdf.length, num_digits); int cur_pos = array_start; int cur_br_start = 0; + // write the /encodings byte range { int num_replaces = calcNumReps(iui.replaces); - int num_holes = num_replaces + 1 + 1; + int num_holes = num_replaces + 1 + 1; // +1 = the /encodings hole - // +1 = the /Cert + // +1 = the /Cert + // +1 = the /Timestamp + if (iui.timeStamper != null) { + num_holes += 1; + } int enc_length = (1 + 3) * num_holes; @@ -1209,6 +1291,25 @@ public abstract class BinarySignature iui.cert_start = cert_start; } + + // write the /Timestamp byte range + if (iui.timeStamper != null) { + StringInfo byte_range = new StringInfo(); + byte_range.string_start = cur_br_start; + byte_range.string_length = timestamp_start - cur_br_start; + iui.byte_ranges.add(byte_range); + + replaceNumber(signed_pdf, cur_pos, byte_range.string_start, num_digits); + cur_pos += num_digits; + cur_pos += 1; + replaceNumber(signed_pdf, cur_pos, byte_range.string_length, num_digits); + cur_pos += num_digits; + cur_pos += 1; + + cur_br_start = timestamp_start + iui.timestamp_length; + + iui.timestamp_start = timestamp_start; + } // determine the /Data byte ranges if any List ifd = iui.invisible_field_definitions; @@ -1361,6 +1462,27 @@ public abstract class BinarySignature // } } + /** + * Replaces the timestam placeholder with the timestamp from the signed + * Signature Object. + * + * @param iui + * The IncrementalUpdateInformation. + * @throws PDFDocumentException + */ + public static void replaceTimestamp(IncrementalUpdateInformation iui) throws PDFDocumentException + { + String timestamp = iui.signed_signature_object.getSigTimeStamp(); + if (timestamp != null) { + byte[] escaped = Placeholder.escapePDFString(timestamp.getBytes()); + if (escaped.length > iui.timestamp_length) + { + throw new PlaceholderException("timestamp", escaped.length - iui.timestamp_length); + } + System.arraycopy(escaped, 0, iui.signed_pdf, iui.timestamp_start, escaped.length); + } + } + /** * Replaces the placeholders with values from the signed SignatureObject. * @@ -1392,6 +1514,13 @@ public abstract class BinarySignature System.arraycopy(ENCODING_NIL, 0, signed_pdf, enc_offset + 1, ENCODING_NIL.length); encoding_entry_index++; } + if (iui.signed_signature_object.getSigTimeStamp() != null) + {// /Timestamp itself + int enc_offset = iui.enc_start + encoding_entry_index * 4; + signed_pdf[enc_offset] = '/'; + System.arraycopy(ENCODING_NIL, 0, signed_pdf, enc_offset + 1, ENCODING_NIL.length); + encoding_entry_index++; + } for (int i = 0; i < iui.replaces.size(); i++) { @@ -1897,6 +2026,7 @@ public abstract class BinarySignature } } + // TODO old code - remove // /** // * For debugging purposes. -- cgit v1.2.3