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(krb5_rd_cred): try both the session key and the sender subkey. Both

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RFC1510 and RFC4120 say that you have to use the session key, Heimdal
uses subkey.


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@16092 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2005-09-23 03:37:57 +00:00
parent 57dfd2209e
commit f0bf8a5c1e
1 changed files with 38 additions and 13 deletions
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51
lib/krb5/rd_cred.c
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@@ -99,24 +99,49 @@ krb5_rd_cred(krb5_context context,
enc_krb_cred_part_data.length = cred.enc_part.cipher.length;
enc_krb_cred_part_data.data = cred.enc_part.cipher.data;
} else {
if (auth_context->remote_subkey)
/* Try both subkey and session key.
*
* RFC2140 claims we should use the session key, but Heimdal
* before 0.8 used the remote subkey if it was send in the
* auth_context.
*/
if (auth_context->remote_subkey) {
ret = krb5_crypto_init(context, auth_context->remote_subkey,
0, &crypto);
else
if (ret)
goto out;
ret = krb5_decrypt_EncryptedData(context,
crypto,
KRB5_KU_KRB_CRED,
&cred.enc_part,
&enc_krb_cred_part_data);
krb5_crypto_destroy(context, crypto);
}
/*
* If there was not subkey, or we failed using subkey,
* retry using the session key
*/
if (auth_context->remote_subkey == NULL || ret == KRB5KRB_AP_ERR_BAD_INTEGRITY)
{
ret = krb5_crypto_init(context, auth_context->keyblock,
0, &crypto);
/* DK: MIT rsh */
if (ret)
goto out;
ret = krb5_decrypt_EncryptedData(context,
crypto,
KRB5_KU_KRB_CRED,
&cred.enc_part,
&enc_krb_cred_part_data);
krb5_crypto_destroy(context, crypto);
if (ret)
goto out;
ret = krb5_decrypt_EncryptedData(context,
crypto,
KRB5_KU_KRB_CRED,
&cred.enc_part,
&enc_krb_cred_part_data);
krb5_crypto_destroy(context, crypto);
}
if (ret)
goto out;
}