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add a class that does all hex encoding #213

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add a class that does all hex encoding #213

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ef933c5
add a class that does all hex encoding
mkleene Nov 22, 2024
66e1b4f
get this working
mkleene Nov 26, 2024
b2f8e54
missed policybinding
mkleene Nov 26, 2024
2b178c2
fix test
mkleene Nov 26, 2024
b30a3bf
Update TDF.java
mkleene Nov 26, 2024
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13 changes: 13 additions & 0 deletions sdk/src/main/java/io/opentdf/platform/sdk/HexString.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,13 @@
package io.opentdf.platform.sdk;

import org.apache.commons.codec.binary.Hex;

public class HexString {
private final byte[] value;

public HexString(byte[] value) {
this.value = value;
}

byte[] byteValue() { return value; }
}
5 changes: 2 additions & 3 deletions sdk/src/main/java/io/opentdf/platform/sdk/Manifest.java
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Expand Up @@ -13,7 +13,6 @@

import io.opentdf.platform.sdk.TDF.AssertionException;

import org.apache.commons.codec.binary.Hex;
import org.erdtman.jcs.JsonCanonicalizer;

import java.io.IOException;
Expand Down Expand Up @@ -343,7 +342,7 @@ public int hashCode() {
return Objects.hash(id, type, scope, appliesToState, statement, binding);
}

public String hash() throws IOException {
public HexString hash() throws IOException {
MessageDigest digest;
try {
digest = MessageDigest.getInstance("SHA-256");
Expand All @@ -353,7 +352,7 @@ public String hash() throws IOException {

var assertionAsJson = gson.toJson(this);
JsonCanonicalizer jc = new JsonCanonicalizer(assertionAsJson);
return Hex.encodeHexString(digest.digest(jc.getEncodedUTF8()));
return new HexString(digest.digest(jc.getEncodedUTF8()));
}

// Sign the assertion with the given hash and signature using the key.
Expand Down
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