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fix for issue #128 - the application will no longer throw an exception on large files when generating the hash digest

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Former-commit-id: aae811e5d10ca0ee5ac7316fa992b5c45e43d2be
This commit is contained in:
Jeremy Long
2014-09-01 07:30:04 -04:00
parent fc0a556e5f
commit 9d78293437
1 changed files with 16 additions and 2 deletions
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18
dependency-check-utils/src/main/java/org/owasp/dependencycheck/utils/Checksum.java
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@@ -63,8 +63,22 @@ public final class Checksum {
try {
fis = new FileInputStream(file);
FileChannel ch = fis.getChannel();
MappedByteBuffer byteBuffer = ch.map(FileChannel.MapMode.READ_ONLY, 0, file.length());
digest.update(byteBuffer);
long remainingToRead = file.length();
long start = 0;
while (remainingToRead > 0) {
long amountToRead;
if (remainingToRead > Integer.MAX_VALUE) {
remainingToRead -= Integer.MAX_VALUE;
amountToRead = Integer.MAX_VALUE;
} else {
amountToRead = remainingToRead;
remainingToRead = 0;
}
MappedByteBuffer byteBuffer = ch.map(FileChannel.MapMode.READ_ONLY, start, amountToRead);
digest.update(byteBuffer);
start += amountToRead;
}
// BufferedInputStream bis = new BufferedInputStream(fis);
// DigestInputStream dis = new DigestInputStream(bis, digest);
// //yes, we are reading in a buffer for performance reasons - 1 byte at a time is SLOW