[Patch] b64Buf to short for certs with a key length longer than 1024 bits

[Michael Braunoeder]

Hi,
I noticed some problems generating XML-signatures with certificates 
which have a key longer than 1024 bits. DSIGSignature::sign produced an 
signature without an errors, but when I tried to verify the signature I 
 got an "OpenSSL:RSA::verify() - Error decrypting signature" execption.

The problem was the
char b64Buf[256];
in DSIGSignature::sign. This is to small for longer keys.
The attached patch changes the length to 1024. It works now for keys 
with a key length of 2048 and 4096.

kind regards,
Michael
diff -r -u xml-security-c-1.1.0.orig/src/dsig/DSIGSignature.cpp 
xml-security-c-1.1.0/src/dsig/DSIGSignature.cpp
--- xml-security-c-1.1.0.orig/src/dsig/DSIGSignature.cpp        2004-03-07 
04:20:51.000000000 +0100
+++ xml-security-c-1.1.0/src/dsig/DSIGSignature.cpp     2004-11-16 
12:07:08.000000000 +0100
@@ -1102,7 +1102,7 @@
        
        // Now check the calculated hash
 
-       char b64Buf[256];
+       char b64Buf[1024];
        unsigned int b64Len;
        safeBuffer b64SB;
        
@@ -1122,7 +1122,7 @@
                        hash, 
                        hashLen,
                        (char *) b64Buf, 
-                       256);
+                       1024);
 
                if (b64Len <= 0) {
 
@@ -1152,7 +1152,7 @@
                        hash, 
                        hashLen,
                        (char *) b64Buf, 
-                       256);
+                       1024);
 
                if (b64Len <= 0) {
 
@@ -1186,7 +1186,7 @@
                                                                hashLen, 
                                                                
mp_signedInfo->getHMACOutputLength());
                
-               strncpy(b64Buf, (char *) b64SB.rawBuffer(), 255);
+               strncpy(b64Buf, (char *) b64SB.rawBuffer(), 1024);
                break;
 
        default :