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ipa-sam: replace encode_nt_key() with E_md4hash()

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Since ipa-sam is running as part of smbd is it safe to use the
E_md4hash() from Samba. This way ipa-sam does not depend on other crypto
libraries which might depend on other rules like e.g. FIPS mode.

Resolves https://pagure.io/freeipa/issue/7026

Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>
This commit is contained in:
Sumit Bose 2017-06-16 16:26:41 +02:00 committed by Pavel Vomacka
parent 52b43c7168
commit f169481b55
1 changed files with 2 additions and 25 deletions
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27
daemons/ipa-sam/ipa_sam.c
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@ -110,6 +110,7 @@ char *sid_string_dbg(const struct dom_sid *sid); /* available in libsmbconf.so *
char *escape_ldap_string(TALLOC_CTX *mem_ctx, const char *s); /* available in libsmbconf.so */
bool secrets_store(const char *key, const void *data, size_t size); /* available in libpdb.so */
void idmap_cache_set_sid2unixid(const struct dom_sid *sid, struct unixid *unix_id); /* available in libsmbconf.so */
bool E_md4hash(const char *passwd, uint8_t p16[16]); /* available in libcliauth-samba4.so */
#define LDAP_OBJ_SAMBASAMACCOUNT "ipaNTUserAttrs"
#define LDAP_OBJ_TRUSTED_DOMAIN "ipaNTTrustedDomain"
@ -2836,11 +2837,7 @@ static bool init_sam_from_td(struct samu *user, struct pdb_trusted_domain *td,
struct dom_sid *g_sid;
char *name;
char *trustpw = NULL;
char *trustpw_utf8 = NULL;
char *tmp_str = NULL;
int ret;
uint8_t nt_key[16];
size_t converted_size;
bool res;
char *sid_str;
enum idmap_error_code err;
@ -2899,19 +2896,7 @@ static bool init_sam_from_td(struct samu *user, struct pdb_trusted_domain *td,
return false;
}
if (!push_utf8_talloc(user, &trustpw_utf8, trustpw, &converted_size)) {
res = false;
goto done;
}
tmp_str = talloc_strdup_upper(user, trustpw);
if (tmp_str == NULL) {
res = false;
goto done;
}
ret = encode_nt_key(trustpw_utf8, nt_key);
if (ret != 0) {
if (!E_md4hash(trustpw, nt_key)) {
res = false;
goto done;
}
@ -2927,14 +2912,6 @@ done:
memset(trustpw, 0, strlen(trustpw));
talloc_free(trustpw);
}
if (trustpw_utf8 != NULL) {
memset(trustpw_utf8, 0, strlen(trustpw_utf8));
talloc_free(trustpw_utf8);
}
if (tmp_str != NULL) {
memset(tmp_str, 0, strlen(tmp_str));
talloc_free(tmp_str);
}
return res;
}