PSS verification - padding bug?

[sbheinric]

I am using jsrsasign-latest-all-min.js

1. I compute PSS signature:

var msg = "hello";
var sig = rsa.signStringPSS(msg, "sha1");

2. I try to verify:

console.log("verified: " + rsa.verifyStringPSS( msg, sig, "sha1" ) );

Error: on line 389 of rsasign-1.2.js, "encoded message does not end in 0xbc";

Let me know if you have any difficulty reproducing

3. I think there may be another error, because the signature given by this method cannot be validated using Crypto++ signature scheme RSASS<PSS, SHA1>, which is the same scheme

[sbheinric]

Found the problem. Rsa key was initialized with values that prevent decryption from inverting the encryption result.

[kjur]

@sbheinric I'm happy to hear your issue was solved. Thanks.

[maiermic]

@sbheinric I try to solve a similar problem (same error). What do you mean by values that prevent decryption from inverting the encryption result?

[maiermic]

Found the problem: A bug in an unicode-to-hex converter (not part of jsrsasign).