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add support for parsing compactseedqr without header or ec bytes

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This commit is contained in:
Craig Raw 2023-07-23 12:45:43 +02:00
parent e15eb7c7f3
commit d7b97c99dc
1 changed files with 24 additions and 16 deletions
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40
src/main/java/com/sparrowwallet/drongo/wallet/SeedQR.java
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@ -31,25 +31,33 @@ public class SeedQR {
}
public static DeterministicSeed getSeed(byte[] compactSeedQr) {
if(compactSeedQr[0] != 0x41 && compactSeedQr[0] != 0x42) {
throw new IllegalArgumentException("Invalid CompactSeedQR header");
}
byte[] seed;
if(compactSeedQr.length < 19) {
throw new IllegalArgumentException("Invalid CompactSeedQR length");
}
String qrHex = Utils.bytesToHex(compactSeedQr);
String seedHex;
if(qrHex.endsWith("0ec11ec11")) {
seedHex = qrHex.substring(3, qrHex.length() - 9); //12 word, high EC
} else if(qrHex.endsWith("0ec")) {
seedHex = qrHex.substring(3, qrHex.length() - 3); //12 word, low EC
if(compactSeedQr.length == 16 || compactSeedQr.length == 32) {
//Assume scan contains seed only
seed = compactSeedQr;
} else {
seedHex = qrHex.substring(3, qrHex.length() - 1); //24 word
}
//Assume scan contains header, seed and EC bytes
if(compactSeedQr[0] != 0x41 && compactSeedQr[0] != 0x42) {
throw new IllegalArgumentException("Invalid CompactSeedQR header");
}
byte[] seed = Utils.hexToBytes(seedHex);
if(compactSeedQr.length < 19) {
throw new IllegalArgumentException("Invalid CompactSeedQR length");
}
String qrHex = Utils.bytesToHex(compactSeedQr);
String seedHex;
if(qrHex.endsWith("0ec11ec11")) {
seedHex = qrHex.substring(3, qrHex.length() - 9); //12 word, high EC
} else if(qrHex.endsWith("0ec")) {
seedHex = qrHex.substring(3, qrHex.length() - 3); //12 word, low EC
} else {
seedHex = qrHex.substring(3, qrHex.length() - 1); //24 word
}
seed = Utils.hexToBytes(seedHex);
}
if(seed.length < 16 || seed.length > 32 || seed.length % 4 > 0) {
throw new IllegalArgumentException("Invalid CompactSeedQR length: " + compactSeedQr.length);