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fix cbor exception exposure and improve crypto-psbt type handling

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This commit is contained in:
Craig Raw 2020-10-15 08:46:52 +02:00
parent d56dae6980
commit 4b012d1dce
3 changed files with 28 additions and 13 deletions
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3
README.md
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@ -39,8 +39,9 @@ Encoding a UR:
```java ```java
final int MIN_FRAGMENT_LENGTH = 10; final int MIN_FRAGMENT_LENGTH = 10;
final int MAX_FRAGMENT_LENGTH = 100; final int MAX_FRAGMENT_LENGTH = 100;
String type = UR.BYTES_TYPE;
UR ur = UR.fromBytes(data); UR ur = UR.fromBytes(type, data);
UREncoder encoder = new UREncoder(ur, MAX_FRAGMENT_LENGTH, MIN_FRAGMENT_LENGTH, 0); UREncoder encoder = new UREncoder(ur, MAX_FRAGMENT_LENGTH, MIN_FRAGMENT_LENGTH, 0);
while(true) { while(true) {
String fragment = encoder.nextPart(); String fragment = encoder.nextPart();

2
build.gradle
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@ -16,7 +16,7 @@ apply plugin: 'com.bmuschko.nexus'
archivesBaseName = 'hummingbird' archivesBaseName = 'hummingbird'
group 'com.sparrowwallet' group 'com.sparrowwallet'
version '1.1' version '1.2'
repositories { repositories {
mavenCentral() mavenCentral()

32
src/main/java/com/sparrowwallet/hummingbird/UR.java
View file

@ -41,14 +41,18 @@ public class UR {
return data; return data;
} }
public byte[] toBytes() throws InvalidTypeException, CborException { public byte[] toBytes() throws InvalidCBORException {
if(!BYTES_TYPE.equals(getType())) { try {
throw new InvalidTypeException("Not a " + BYTES_TYPE + " type");
}
ByteArrayInputStream bais = new ByteArrayInputStream(getCbor()); ByteArrayInputStream bais = new ByteArrayInputStream(getCbor());
List<DataItem> dataItems = new CborDecoder(bais).decode(); List<DataItem> dataItems = new CborDecoder(bais).decode();
if(!(dataItems.get(0) instanceof ByteString)) {
throw new IllegalArgumentException("First element of CBOR is not a byte string");
}
return ((ByteString)dataItems.get(0)).getBytes(); return ((ByteString)dataItems.get(0)).getBytes();
} catch(CborException e) {
throw new InvalidCBORException(e.getMessage());
}
} }
public static boolean isURType(String type) { public static boolean isURType(String type) {
@ -67,7 +71,11 @@ public class UR {
return false; return false;
} }
public static UR fromBytes(byte[] data) { public static UR fromBytes(byte[] data) throws InvalidTypeException, InvalidCBORException {
return fromBytes(BYTES_TYPE, data);
}
public static UR fromBytes(String type, byte[] data) throws InvalidTypeException, InvalidCBORException {
try { try {
ByteArrayOutputStream baos = new ByteArrayOutputStream(); ByteArrayOutputStream baos = new ByteArrayOutputStream();
new CborEncoder(baos).encode(new CborBuilder() new CborEncoder(baos).encode(new CborBuilder()
@ -75,9 +83,9 @@ public class UR {
.build()); .build());
byte[] cbor = baos.toByteArray(); byte[] cbor = baos.toByteArray();
return new UR("bytes", cbor); return new UR(type, cbor);
} catch(InvalidTypeException | CborException e) { } catch(CborException e) {
return null; throw new InvalidCBORException(e.getMessage());
} }
} }
@ -134,4 +142,10 @@ public class UR {
super(message); super(message);
} }
} }
public static class InvalidCBORException extends URException {
public InvalidCBORException(String message) {
super(message);
}
}
} }