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by using a prompter function we can avoid the bug in the MIT kerberos

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libraries with handling blank passwords.
(This used to be commit 59d755ffb57c322a104ff8f52819956cafff1bac)
This commit is contained in:
Andrew Tridgell 2002-04-15 04:55:37 +00:00
parent 1667a82106
commit f6929068a1
1 changed files with 25 additions and 7 deletions
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32
source3/libads/kerberos.c
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@ -24,6 +24,28 @@
#ifdef HAVE_KRB5
/*
we use a prompter to avoid a crash bug in the kerberos libs when
dealing with empty passwords
this prompter is just a string copy ...
*/
static krb5_error_code
kerb_prompter(krb5_context ctx, void *data,
const char *name,
const char *banner,
int num_prompts,
krb5_prompt prompts[])
{
if (num_prompts == 0) return 0;
memset(prompts[0].reply->data, 0, prompts[0].reply->length);
if (prompts[0].reply->length > 0) {
strncpy(prompts[0].reply->data, data, prompts[0].reply->length-1);
prompts[0].reply->length = strlen(prompts[0].reply->data);
}
return 0;
}
/*
simulate a kinit, putting the tgt in the default cache location
remus@snapserver.com
@ -36,11 +58,6 @@ int kerberos_kinit_password(const char *principal, const char *password)
krb5_principal me;
krb5_creds my_creds;
if (! *password) {
/* kerberos dies on an empty password! */
return KRB5_PARSE_MALFORMED;
}
if ((code = krb5_init_context(&ctx)))
return code;
@ -54,8 +71,9 @@ int kerberos_kinit_password(const char *principal, const char *password)
return code;
}
if ((code = krb5_get_init_creds_password(ctx, &my_creds, me, (char*)password, NULL,
NULL, 0, NULL, NULL))) {
if ((code = krb5_get_init_creds_password(ctx, &my_creds, me, NULL,
kerb_prompter,
password, 0, NULL, NULL))) {
krb5_free_principal(ctx, me);
krb5_free_context(ctx);
return code;