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Fix testjwt crash when built with GNUTLS #1287

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Fix testjwt crash when built with GNUTLS #1287

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22 changes: 15 additions & 7 deletions cups/jwt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -517,19 +517,27 @@ cupsJWTHasValidSignature(
{
gnutls_datum_t r, s; // Signature coordinates

text_datum.data = (unsigned char *)text;
text_datum.size = (unsigned)text_len;
text_datum.data = (unsigned char *)text;
text_datum.size = (unsigned)text_len;

r.data = jwt->signature;
r.size = (unsigned)jwt->sigsize / 2;
r.data = jwt->signature;
r.size = (unsigned)jwt->sigsize / 2;
s.data = jwt->signature + jwt->sigsize / 2;
s.size = (unsigned)jwt->sigsize / 2;
s.size = (unsigned)jwt->sigsize / 2;

gnutls_encode_rs_value(&sig_datum, &r, &s);

ret = !gnutls_pubkey_verify_data2(key, algs[jwt->sigalg - CUPS_JWA_RS256], 0, &text_datum, &sig_datum);
ret = !gnutls_pubkey_verify_data2(key, algs[jwt->sigalg - CUPS_JWA_RS256], 0, &text_datum, &sig_datum);

gnutls_pubkey_deinit(key);

if (!ret)
{
free(text);
break;
}

gnutls_free(sig_datum.data);
gnutls_pubkey_deinit(key);
}
#endif // HAVE_OPENSSL

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