Method joseToDerEcdsa

CodenameOne/src/com/codename1/security/Jwt.java:420–450

(byte[] jose, int coordLen)

    }

    private static byte[] joseToDerEcdsa(byte[] jose, int coordLen) {
        if (jose.length != coordLen * 2) {
            throw new CryptoException("bad ECDSA JOSE signature length");
        }
        byte[] r = trimAndAddSignByte(jose, 0, coordLen);
        byte[] s = trimAndAddSignByte(jose, coordLen, coordLen);
        int seqLen = 2 + r.length + 2 + s.length;
        byte[] out;
        if (seqLen < 128) {
            out = new byte[2 + seqLen];
            out[0] = 0x30;
            out[1] = (byte) seqLen;
            int p = 2;
            out[p++] = 0x02; out[p++] = (byte) r.length;
            System.arraycopy(r, 0, out, p, r.length); p += r.length;
            out[p++] = 0x02; out[p++] = (byte) s.length;
            System.arraycopy(s, 0, out, p, s.length);
        } else {
            // 0x81 length form
            out = new byte[3 + seqLen];
            out[0] = 0x30;
            out[1] = (byte) 0x81;
            out[2] = (byte) seqLen;
            int p = 3;
            out[p++] = 0x02; out[p++] = (byte) r.length;
            System.arraycopy(r, 0, out, p, r.length); p += r.length;
            out[p++] = 0x02; out[p++] = (byte) s.length;
            System.arraycopy(s, 0, out, p, s.length);
        }
        return out;
    }

    private static byte[] trimAndAddSignByte(byte[] src, int off, int len) {
        int start = off;