fix broken curve25519 decryption
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1 changed files with 8 additions and 2 deletions
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@ -164,9 +164,15 @@ public class PsoDecryptTokenOp {
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*/
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byte[] keyEncryptionKey = response.getData();
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int xLen = (keyEncryptionKey.length - 1) / 2;
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int xLen;
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boolean isCurve25519 = CryptlibObjectIdentifiers.curvey25519.equals(eckf.getCurveOID());
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if (isCurve25519) {
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xLen = keyEncryptionKey.length;
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} else {
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xLen = (keyEncryptionKey.length - 1) / 2;
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}
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final byte[] kekX = new byte[xLen];
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System.arraycopy(keyEncryptionKey, 1, kekX, 0, xLen);
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System.arraycopy(keyEncryptionKey, isCurve25519 ? 0 : 1, kekX, 0, xLen);
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final byte[] keyEnc = new byte[encryptedSessionKeyMpi[mpiLength + 2]];
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