diff options
| -rw-r--r-- | src/main/java/at/knowcenter/wag/egov/egiz/pdf/BinarySignature.java | 136 |
1 files changed, 133 insertions, 3 deletions
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;
@@ -1362,6 +1463,27 @@ 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.
*
* @param iui
@@ -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.
|