#include "auth/credentials/credentials_krb5.h"
#include "auth/kerberos/kerberos_credentials.h"
#include "auth/kerberos/kerberos_util.h"
-#include <ldb.h>
-#include "param/secrets.h"
struct principal_container {
struct smb_krb5_context *smb_krb5_context;
princ_string, princ);
if (ret) {
- (*error_string) = smb_get_krb5_error_message(smb_krb5_context->krb5_context, ret, parent_ctx);
+ (*error_string) = smb_get_krb5_error_message(
+ smb_krb5_context->krb5_context,
+ ret, parent_ctx);
return ret;
}
/* This song-and-dance effectivly puts the principal
* into talloc, so we can't loose it. */
- mem_ctx->smb_krb5_context = talloc_reference(mem_ctx, smb_krb5_context);
+ mem_ctx->smb_krb5_context = talloc_reference(mem_ctx,
+ smb_krb5_context);
mem_ctx->principal = *princ;
talloc_set_destructor(mem_ctx, free_principal);
return 0;
}
-static krb5_error_code principals_from_msg(TALLOC_CTX *parent_ctx,
- struct ldb_message *msg,
- struct smb_krb5_context *smb_krb5_context,
- struct principal_container ***principals_out,
- const char **error_string)
-{
- unsigned int i;
- krb5_error_code ret;
- char *upper_realm;
- const char *realm = ldb_msg_find_attr_as_string(msg, "realm", NULL);
- const char *samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
- struct ldb_message_element *spn_el = ldb_msg_find_element(msg, "servicePrincipalName");
- TALLOC_CTX *tmp_ctx;
- struct principal_container **principals;
- tmp_ctx = talloc_new(parent_ctx);
- if (!tmp_ctx) {
- *error_string = "Cannot allocate tmp_ctx";
- return ENOMEM;
- }
-
- if (!realm) {
- *error_string = "Cannot have a kerberos secret in secrets.ldb without a realm";
- return EINVAL;
- }
-
- upper_realm = strupper_talloc(tmp_ctx, realm);
- if (!upper_realm) {
- talloc_free(tmp_ctx);
- *error_string = "Cannot allocate full upper case realm";
- return ENOMEM;
- }
-
- principals = talloc_array(tmp_ctx, struct principal_container *, spn_el ? (spn_el->num_values + 2) : 2);
-
- spn_el = ldb_msg_find_element(msg, "servicePrincipalName");
- for (i=0; spn_el && i < spn_el->num_values; i++) {
- principals[i] = talloc(principals, struct principal_container);
- if (!principals[i]) {
- talloc_free(tmp_ctx);
- *error_string = "Cannot allocate mem_ctx";
- return ENOMEM;
- }
-
- principals[i]->smb_krb5_context = talloc_reference(principals[i], smb_krb5_context);
- principals[i]->string_form = talloc_asprintf(principals[i], "%*.*s@%s",
- (int)spn_el->values[i].length,
- (int)spn_el->values[i].length,
- (const char *)spn_el->values[i].data, upper_realm);
- if (!principals[i]->string_form) {
- talloc_free(tmp_ctx);
- *error_string = "Cannot allocate full samAccountName";
- return ENOMEM;
- }
-
- ret = krb5_parse_name(smb_krb5_context->krb5_context,
- principals[i]->string_form, &principals[i]->principal);
-
- if (ret) {
- talloc_free(tmp_ctx);
- (*error_string) = smb_get_krb5_error_message(smb_krb5_context->krb5_context, ret, parent_ctx);
- return ret;
- }
-
- /* This song-and-dance effectivly puts the principal
- * into talloc, so we can't loose it. */
- talloc_set_destructor(principals[i], free_principal);
- }
-
- if (samAccountName) {
- principals[i] = talloc(principals, struct principal_container);
- if (!principals[i]) {
- talloc_free(tmp_ctx);
- *error_string = "Cannot allocate mem_ctx";
- return ENOMEM;
- }
-
- principals[i]->smb_krb5_context = talloc_reference(principals[i], smb_krb5_context);
- principals[i]->string_form = talloc_asprintf(parent_ctx, "%s@%s", samAccountName, upper_realm);
- if (!principals[i]->string_form) {
- talloc_free(tmp_ctx);
- *error_string = "Cannot allocate full samAccountName";
- return ENOMEM;
- }
-
- ret = krb5_make_principal(smb_krb5_context->krb5_context, &principals[i]->principal, upper_realm, samAccountName,
- NULL);
- if (ret) {
- talloc_free(tmp_ctx);
- (*error_string) = smb_get_krb5_error_message(smb_krb5_context->krb5_context, ret, parent_ctx);
- return ret;
- }
-
- /* This song-and-dance effectively puts the principal
- * into talloc, so we can't loose it. */
- talloc_set_destructor(principals[i], free_principal);
- i++;
- }
-
- principals[i] = NULL;
- *principals_out = talloc_steal(parent_ctx, principals);
-
- talloc_free(tmp_ctx);
- return ret;
-}
-
-static krb5_error_code salt_principal_from_msg(TALLOC_CTX *parent_ctx,
- struct ldb_message *msg,
- struct smb_krb5_context *smb_krb5_context,
- krb5_principal *salt_princ,
- const char **error_string)
-{
- const char *salt_principal = ldb_msg_find_attr_as_string(msg, "saltPrincipal", NULL);
- const char *samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
- const char *realm = ldb_msg_find_attr_as_string(msg, "realm", NULL);
- if (salt_principal) {
- return parse_principal(parent_ctx, salt_principal, smb_krb5_context, salt_princ, error_string);
- } else if (samAccountName) {
- krb5_error_code ret;
- char *machine_username;
- char *salt_body;
- char *lower_realm;
- char *upper_realm;
-
- TALLOC_CTX *tmp_ctx;
- struct principal_container *mem_ctx = talloc(parent_ctx, struct principal_container);
- if (!mem_ctx) {
- *error_string = "Cannot allocate mem_ctx";
- return ENOMEM;
- }
-
- tmp_ctx = talloc_new(mem_ctx);
- if (!tmp_ctx) {
- talloc_free(mem_ctx);
- *error_string = "Cannot allocate tmp_ctx";
- return ENOMEM;
- }
-
- if (!realm) {
- *error_string = "Cannot have a kerberos secret in secrets.ldb without a realm";
- return EINVAL;
- }
-
- machine_username = talloc_strdup(tmp_ctx, samAccountName);
- if (!machine_username) {
- talloc_free(mem_ctx);
- *error_string = "Cannot duplicate samAccountName";
- return ENOMEM;
- }
-
- if (machine_username[strlen(machine_username)-1] == '$') {
- machine_username[strlen(machine_username)-1] = '\0';
- }
-
- lower_realm = strlower_talloc(tmp_ctx, realm);
- if (!lower_realm) {
- talloc_free(mem_ctx);
- *error_string = "Cannot allocate to lower case realm";
- return ENOMEM;
- }
-
- upper_realm = strupper_talloc(tmp_ctx, realm);
- if (!upper_realm) {
- talloc_free(mem_ctx);
- *error_string = "Cannot allocate to upper case realm";
- return ENOMEM;
- }
-
- salt_body = talloc_asprintf(tmp_ctx, "%s.%s", machine_username,
- lower_realm);
- talloc_free(lower_realm);
- talloc_free(machine_username);
- if (!salt_body) {
- talloc_free(mem_ctx);
- *error_string = "Cannot form salt principal body";
- return ENOMEM;
- }
-
- ret = krb5_make_principal(smb_krb5_context->krb5_context, salt_princ,
- upper_realm,
- "host", salt_body, NULL);
- if (ret == 0) {
- /* This song-and-dance effectively puts the principal
- * into talloc, so we can't loose it. */
- mem_ctx->smb_krb5_context = talloc_reference(mem_ctx, smb_krb5_context);
- mem_ctx->principal = *salt_princ;
- talloc_set_destructor(mem_ctx, free_principal);
- } else {
- (*error_string) = smb_get_krb5_error_message(smb_krb5_context->krb5_context, ret, parent_ctx);
- }
- talloc_free(tmp_ctx);
- return ret;
- } else {
- (*error_string) = "Cannot determine salt principal, no saltPrincipal or samAccountName specified";
- return EINVAL;
- }
-}
-
/* Obtain the principal set on this context. Requires a
* smb_krb5_context because we are doing krb5 principal parsing with
* the library routines. The returned princ is placed in the talloc
* system by means of a destructor (do *not* free). */
-krb5_error_code principal_from_credentials(TALLOC_CTX *parent_ctx,
- struct cli_credentials *credentials,
- struct smb_krb5_context *smb_krb5_context,
- krb5_principal *princ,
- enum credentials_obtained *obtained,
- const char **error_string)
+krb5_error_code principal_from_credentials(TALLOC_CTX *parent_ctx,
+ struct cli_credentials *credentials,
+ struct smb_krb5_context *smb_krb5_context,
+ krb5_principal *princ,
+ enum credentials_obtained *obtained,
+ const char **error_string)
{
krb5_error_code ret;
const char *princ_string;
TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
+ *obtained = CRED_UNINITIALISED;
+
if (!mem_ctx) {
(*error_string) = error_message(ENOMEM);
return ENOMEM;
}
- princ_string = cli_credentials_get_principal_and_obtained(credentials, mem_ctx, obtained);
+ princ_string = cli_credentials_get_principal_and_obtained(credentials,
+ mem_ctx,
+ obtained);
if (!princ_string) {
- (*error_string) = error_message(ENOMEM);
- return ENOMEM;
+ *princ = NULL;
+ return 0;
}
ret = parse_principal(parent_ctx, princ_string,
* the library routines. The returned princ is placed in the talloc
* system by means of a destructor (do *not* free). */
- krb5_error_code impersonate_principal_from_credentials(TALLOC_CTX *parent_ctx,
- struct cli_credentials *credentials,
- struct smb_krb5_context *smb_krb5_context,
- krb5_principal *princ,
- const char **error_string)
+static krb5_error_code impersonate_principal_from_credentials(
+ TALLOC_CTX *parent_ctx,
+ struct cli_credentials *credentials,
+ struct smb_krb5_context *smb_krb5_context,
+ krb5_principal *princ,
+ const char **error_string)
+{
+ return parse_principal(parent_ctx,
+ cli_credentials_get_impersonate_principal(credentials),
+ smb_krb5_context, princ, error_string);
+}
+
+krb5_error_code smb_krb5_create_principals_array(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ const char *account_name,
+ const char *realm,
+ uint32_t num_spns,
+ const char *spns[],
+ uint32_t *pnum_principals,
+ krb5_principal **pprincipals,
+ const char **error_string)
{
- return parse_principal(parent_ctx, cli_credentials_get_impersonate_principal(credentials),
- smb_krb5_context, princ, error_string);
+ krb5_error_code code;
+ TALLOC_CTX *tmp_ctx;
+ uint32_t num_principals = 0;
+ krb5_principal *principals;
+ uint32_t i;
+
+ tmp_ctx = talloc_new(mem_ctx);
+ if (tmp_ctx == NULL) {
+ *error_string = "Cannot allocate tmp_ctx";
+ return ENOMEM;
+ }
+
+ if (realm == NULL) {
+ *error_string = "Cannot create principal without a realm";
+ code = EINVAL;
+ goto done;
+ }
+
+ if (account_name == NULL && (num_spns == 0 || spns == NULL)) {
+ *error_string = "Cannot create principal without an account or SPN";
+ code = EINVAL;
+ goto done;
+ }
+
+ if (account_name != NULL && account_name[0] != '\0') {
+ num_principals++;
+ }
+ num_principals += num_spns;
+
+ principals = talloc_zero_array(tmp_ctx,
+ krb5_principal,
+ num_principals);
+ if (principals == NULL) {
+ *error_string = "Cannot allocate principals";
+ code = ENOMEM;
+ goto done;
+ }
+
+ for (i = 0; i < num_spns; i++) {
+ code = krb5_parse_name(context, spns[i], &(principals[i]));
+ if (code != 0) {
+ *error_string = smb_get_krb5_error_message(context,
+ code,
+ mem_ctx);
+ goto done;
+ }
+ }
+
+ if (account_name != NULL && account_name[0] != '\0') {
+ code = smb_krb5_make_principal(context,
+ &(principals[i]),
+ realm,
+ account_name,
+ NULL);
+ if (code != 0) {
+ *error_string = smb_get_krb5_error_message(context,
+ code,
+ mem_ctx);
+ goto done;
+ }
+ }
+
+ if (pnum_principals != NULL) {
+ *pnum_principals = num_principals;
+
+ if (pprincipals != NULL) {
+ *pprincipals = talloc_steal(mem_ctx, principals);
+ }
+ }
+
+ code = 0;
+done:
+ talloc_free(tmp_ctx);
+ return code;
}
/**
return ret;
}
+ if (princ == NULL) {
+ (*error_string) = talloc_asprintf(credentials, "principal, username or realm was not specified in the credentials");
+ talloc_free(mem_ctx);
+ return KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN;
+ }
+
ret = impersonate_principal_from_credentials(mem_ctx, credentials, smb_krb5_context, &impersonate_principal, error_string);
if (ret) {
talloc_free(mem_ctx);
return ret;
}
+#ifdef SAMBA4_USES_HEIMDAL /* Disable for now MIT reads defaults when needed */
/* get the defaults */
krb5_get_init_creds_opt_set_default_flags(smb_krb5_context->krb5_context, NULL, NULL, krb_options);
-
+#endif
/* set if we want a forwardable ticket */
switch (cli_credentials_get_krb_forwardable(credentials)) {
case CRED_AUTO_KRB_FORWARDABLE:
break;
}
+#ifdef SAMBA4_USES_HEIMDAL /* FIXME: MIT does not have this yet */
+ /*
+ * In order to work against windows KDCs even if we use
+ * the netbios domain name as realm, we need to add the following
+ * flags:
+ * KRB5_INIT_CREDS_NO_C_CANON_CHECK;
+ * KRB5_INIT_CREDS_NO_C_NO_EKU_CHECK;
+ *
+ * On MIT: Set pkinit_eku_checking to none
+ */
+ krb5_get_init_creds_opt_set_win2k(smb_krb5_context->krb5_context,
+ krb_options, true);
+#endif
+
tries = 2;
while (tries--) {
+#ifdef SAMBA4_USES_HEIMDAL
struct tevent_context *previous_ev;
/* Do this every time, in case we have weird recursive issues here */
ret = smb_krb5_context_set_event_ctx(smb_krb5_context, event_ctx, &previous_ev);
talloc_free(mem_ctx);
return ret;
}
+#endif
if (password) {
- ret = kerberos_kinit_password_cc(smb_krb5_context->krb5_context, ccache,
- princ, password,
- impersonate_principal,
- self_service,
- krb_options,
- NULL, &kdc_time);
+ if (impersonate_principal) {
+#ifdef SAMBA4_USES_HEIMDAL
+ ret = kerberos_kinit_s4u2_cc(
+ smb_krb5_context->krb5_context,
+ ccache, princ, password,
+ impersonate_principal,
+ self_service, target_service,
+ krb_options, NULL, &kdc_time);
+#else
+ talloc_free(mem_ctx);
+ (*error_string) = "INTERNAL error: s4u2 ops "
+ "are not supported with MIT build yet";
+ return EINVAL;
+#endif
+ } else {
+ ret = kerberos_kinit_password_cc(
+ smb_krb5_context->krb5_context,
+ ccache, princ, password,
+ target_service,
+ krb_options, NULL, &kdc_time);
+ }
} else if (impersonate_principal) {
talloc_free(mem_ctx);
(*error_string) = "INTERNAL error: Cannot impersonate principal with just a keyblock. A password must be specified in the credentials";
talloc_free(mem_ctx);
(*error_string) = "kinit_to_ccache: No password available for kinit\n";
krb5_get_init_creds_opt_free(smb_krb5_context->krb5_context, krb_options);
+#ifdef SAMBA4_USES_HEIMDAL
smb_krb5_context_remove_event_ctx(smb_krb5_context, previous_ev, event_ctx);
+#endif
return EINVAL;
}
- ret = krb5_keyblock_init(smb_krb5_context->krb5_context,
+ ret = smb_krb5_keyblock_init_contents(smb_krb5_context->krb5_context,
ENCTYPE_ARCFOUR_HMAC,
mach_pwd->hash, sizeof(mach_pwd->hash),
&keyblock);
}
}
+#ifdef SAMBA4_USES_HEIMDAL
smb_krb5_context_remove_event_ctx(smb_krb5_context, previous_ev, event_ctx);
+#endif
if (ret == KRB5KRB_AP_ERR_SKEW || ret == KRB5_KDCREP_SKEW) {
/* Perhaps we have been given an invalid skew, so try again without it */
}
krb5_error_code smb_krb5_get_keytab_container(TALLOC_CTX *mem_ctx,
- struct smb_krb5_context *smb_krb5_context,
- const char *keytab_name, struct keytab_container **ktc)
+ struct smb_krb5_context *smb_krb5_context,
+ krb5_keytab opt_keytab,
+ const char *keytab_name,
+ struct keytab_container **ktc)
{
krb5_keytab keytab;
krb5_error_code ret;
- ret = krb5_kt_resolve(smb_krb5_context->krb5_context, keytab_name, &keytab);
- if (ret) {
- DEBUG(1,("failed to open krb5 keytab: %s\n",
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx)));
- return ret;
- }
-
- *ktc = talloc(mem_ctx, struct keytab_container);
- if (!*ktc) {
- return ENOMEM;
- }
-
- (*ktc)->smb_krb5_context = talloc_reference(*ktc, smb_krb5_context);
- (*ktc)->keytab = keytab;
- talloc_set_destructor(*ktc, free_keytab_container);
-
- return 0;
-}
-
-static krb5_error_code keytab_add_keys(TALLOC_CTX *parent_ctx,
- struct principal_container **principals,
- krb5_principal salt_princ,
- int kvno,
- const char *password_s,
- struct smb_krb5_context *smb_krb5_context,
- krb5_enctype *enctypes,
- krb5_keytab keytab,
- const char **error_string)
-{
- unsigned int i, p;
- krb5_error_code ret;
- krb5_data password;
-
- password.data = discard_const_p(char *, password_s);
- password.length = strlen(password_s);
-
- for (i=0; enctypes[i]; i++) {
- krb5_keytab_entry entry;
-
- ZERO_STRUCT(entry);
-
- ret = create_kerberos_key_from_string_direct(smb_krb5_context->krb5_context,
- salt_princ, &password, &entry.keyblock, enctypes[i]);
- if (ret != 0) {
- return ret;
- }
-
- entry.vno = kvno;
-
- for (p=0; principals[p]; p++) {
- entry.principal = principals[p]->principal;
- ret = krb5_kt_add_entry(smb_krb5_context->krb5_context, keytab, &entry);
- if (ret != 0) {
- char *k5_error_string = smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, NULL);
- *error_string = talloc_asprintf(parent_ctx, "Failed to add enctype %d entry for %s(kvno %d) to keytab: %s\n",
- (int)enctypes[i],
- principals[p]->string_form,
- kvno,
- k5_error_string);
- talloc_free(k5_error_string);
- krb5_free_keyblock_contents(smb_krb5_context->krb5_context, &entry.keyblock);
- return ret;
- }
-
- DEBUG(5, ("Added %s(kvno %d) to keytab (enctype %d)\n",
- principals[p]->string_form, kvno,
- (int)enctypes[i]));
- }
- krb5_free_keyblock_contents(smb_krb5_context->krb5_context, &entry.keyblock);
- }
- return 0;
-}
-
-static krb5_error_code create_keytab(TALLOC_CTX *parent_ctx,
- struct ldb_message *msg,
- struct principal_container **principals,
- struct smb_krb5_context *smb_krb5_context,
- krb5_keytab keytab,
- bool add_old,
- const char **error_string)
-{
- krb5_error_code ret;
- const char *password_s;
- const char *old_secret;
- int kvno;
- uint32_t enctype_bitmap;
- krb5_principal salt_princ;
- krb5_enctype *enctypes;
- TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
- if (!mem_ctx) {
- *error_string = "unable to allocate tmp_ctx for create_keytab";
- return ENOMEM;
- }
-
- /* The salt used to generate these entries may be different however, fetch that */
- ret = salt_principal_from_msg(mem_ctx, msg,
- smb_krb5_context,
- &salt_princ, error_string);
- if (ret) {
- talloc_free(mem_ctx);
- return ret;
- }
-
- kvno = ldb_msg_find_attr_as_int(msg, "msDS-KeyVersionNumber", 0);
- /* Finally, do the dance to get the password to put in the entry */
- password_s = ldb_msg_find_attr_as_string(msg, "secret", NULL);
-
- if (!password_s) {
- /* There is no password here, so nothing to do */
- talloc_free(mem_ctx);
- return 0;
- }
-
- if (add_old && kvno != 0) {
- old_secret = ldb_msg_find_attr_as_string(msg, "priorSecret", NULL);
+ if (opt_keytab) {
+ keytab = opt_keytab;
} else {
- old_secret = NULL;
- }
-
- enctype_bitmap = (uint32_t)ldb_msg_find_attr_as_int(msg, "msDS-SupportedEncryptionTypes", ENC_ALL_TYPES);
-
- ret = kerberos_enctype_bitmap_to_enctypes(mem_ctx, enctype_bitmap, &enctypes);
- if (ret) {
- *error_string = talloc_asprintf(parent_ctx, "create_keytab: generating list of encryption types failed (%s)\n",
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx));
- talloc_free(mem_ctx);
- return ret;
- }
-
- ret = keytab_add_keys(mem_ctx, principals,
- salt_princ,
- kvno, password_s, smb_krb5_context,
- enctypes, keytab, error_string);
- if (ret) {
- talloc_free(mem_ctx);
- return ret;
- }
-
- if (old_secret) {
- ret = keytab_add_keys(mem_ctx, principals,
- salt_princ,
- kvno - 1, old_secret, smb_krb5_context,
- enctypes, keytab, error_string);
+ ret = krb5_kt_resolve(smb_krb5_context->krb5_context,
+ keytab_name, &keytab);
if (ret) {
- talloc_free(mem_ctx);
+ DEBUG(1,("failed to open krb5 keytab: %s\n",
+ smb_get_krb5_error_message(
+ smb_krb5_context->krb5_context,
+ ret, mem_ctx)));
return ret;
}
}
- talloc_free(mem_ctx);
- return ret;
-}
-
-/*
- * Walk the keytab, looking for entries of this principal name, with KVNO other than current kvno -1.
- *
- * These entries are now stale, we only keep the current, and previous entries around.
- *
- * Inspired by the code in Samba3 for 'use kerberos keytab'.
- *
- */
-
-static krb5_error_code remove_old_entries(TALLOC_CTX *parent_ctx,
- struct ldb_message *msg,
- struct principal_container **principals,
- bool delete_all_kvno,
- struct smb_krb5_context *smb_krb5_context,
- krb5_keytab keytab, bool *found_previous,
- const char **error_string)
-{
- krb5_error_code ret, ret2;
- krb5_kt_cursor cursor;
- int kvno;
- TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
-
- if (!mem_ctx) {
- return ENOMEM;
- }
-
- *found_previous = false;
-
- kvno = ldb_msg_find_attr_as_int(msg, "msDS-KeyVersionNumber", 0);
-
- /* for each entry in the keytab */
- ret = krb5_kt_start_seq_get(smb_krb5_context->krb5_context, keytab, &cursor);
- switch (ret) {
- case 0:
- break;
- case HEIM_ERR_OPNOTSUPP:
- case ENOENT:
- case KRB5_KT_END:
- /* no point enumerating if there isn't anything here */
- talloc_free(mem_ctx);
- return 0;
- default:
- *error_string = talloc_asprintf(parent_ctx, "failed to open keytab for read of old entries: %s\n",
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx));
- talloc_free(mem_ctx);
- return ret;
- }
-
- while (!ret) {
- unsigned int i;
- bool matched = false;
- krb5_keytab_entry entry;
- ret = krb5_kt_next_entry(smb_krb5_context->krb5_context, keytab, &entry, &cursor);
- if (ret) {
- break;
- }
- for (i = 0; principals[i]; i++) {
- /* if it matches our principal */
- if (krb5_kt_compare(smb_krb5_context->krb5_context, &entry, principals[i]->principal, 0, 0)) {
- matched = true;
- break;
- }
- }
-
- if (!matched) {
- /* Free the entry, it wasn't the one we were looking for anyway */
- krb5_kt_free_entry(smb_krb5_context->krb5_context, &entry);
- continue;
- }
-
- /* delete it, if it is not kvno -1 */
- if (entry.vno != (kvno - 1 )) {
- /* Release the enumeration. We are going to
- * have to start this from the top again,
- * because deletes during enumeration may not
- * always be consistent.
- *
- * Also, the enumeration locks a FILE: keytab
- */
-
- krb5_kt_end_seq_get(smb_krb5_context->krb5_context, keytab, &cursor);
-
- ret = krb5_kt_remove_entry(smb_krb5_context->krb5_context, keytab, &entry);
- krb5_kt_free_entry(smb_krb5_context->krb5_context, &entry);
-
- /* Deleted: Restart from the top */
- ret2 = krb5_kt_start_seq_get(smb_krb5_context->krb5_context, keytab, &cursor);
- if (ret2) {
- krb5_kt_free_entry(smb_krb5_context->krb5_context, &entry);
- DEBUG(1,("failed to restart enumeration of keytab: %s\n",
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx)));
-
- talloc_free(mem_ctx);
- return ret2;
- }
-
- if (ret) {
- break;
- }
-
- } else {
- *found_previous = true;
- }
-
- /* Free the entry, we don't need it any more */
- krb5_kt_free_entry(smb_krb5_context->krb5_context, &entry);
-
-
- }
- krb5_kt_end_seq_get(smb_krb5_context->krb5_context, keytab, &cursor);
-
- switch (ret) {
- case 0:
- break;
- case ENOENT:
- case KRB5_KT_END:
- ret = 0;
- break;
- default:
- *error_string = talloc_asprintf(parent_ctx, "failed in deleting old entries for principal: %s\n",
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx));
- }
- talloc_free(mem_ctx);
- return ret;
-}
-
-krb5_error_code smb_krb5_update_keytab(TALLOC_CTX *parent_ctx,
- struct smb_krb5_context *smb_krb5_context,
- struct ldb_context *ldb,
- struct ldb_message *msg,
- bool delete_all_kvno,
- const char **error_string)
-{
- krb5_error_code ret;
- bool found_previous;
- TALLOC_CTX *mem_ctx = talloc_new(NULL);
- struct keytab_container *keytab_container;
- struct principal_container **principals;
- const char *keytab_name;
-
- if (!mem_ctx) {
- return ENOMEM;
- }
-
- keytab_name = keytab_name_from_msg(mem_ctx, ldb, msg);
- if (!keytab_name) {
- return ENOENT;
- }
-
- ret = smb_krb5_get_keytab_container(mem_ctx, smb_krb5_context, keytab_name, &keytab_container);
-
- if (ret != 0) {
- talloc_free(mem_ctx);
- return ret;
- }
-
- DEBUG(5, ("Opened keytab %s\n", keytab_name));
-
- /* Get the principal we will store the new keytab entries under */
- ret = principals_from_msg(mem_ctx, msg, smb_krb5_context, &principals, error_string);
-
- if (ret != 0) {
- *error_string = talloc_asprintf(parent_ctx, "Failed to load principals from ldb message: %s\n", *error_string);
- talloc_free(mem_ctx);
- return ret;
- }
-
- ret = remove_old_entries(mem_ctx, msg, principals, delete_all_kvno,
- smb_krb5_context, keytab_container->keytab, &found_previous, error_string);
- if (ret != 0) {
- *error_string = talloc_asprintf(parent_ctx, "Failed to remove old principals from keytab: %s\n", *error_string);
- talloc_free(mem_ctx);
- return ret;
- }
-
- if (!delete_all_kvno) {
- /* Create a new keytab. If during the cleanout we found
- * entires for kvno -1, then don't try and duplicate them.
- * Otherwise, add kvno, and kvno -1 */
-
- ret = create_keytab(mem_ctx, msg, principals,
- smb_krb5_context,
- keytab_container->keytab,
- found_previous ? false : true, error_string);
- }
- talloc_free(mem_ctx);
- return ret;
-}
-
-krb5_error_code smb_krb5_create_memory_keytab(TALLOC_CTX *parent_ctx,
- struct cli_credentials *machine_account,
- struct smb_krb5_context *smb_krb5_context,
- struct keytab_container **keytab_container)
-{
- krb5_error_code ret;
- TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
- const char *rand_string;
- const char *keytab_name;
- struct ldb_message *msg;
- const char *error_string;
- if (!mem_ctx) {
- return ENOMEM;
- }
-
- *keytab_container = talloc(mem_ctx, struct keytab_container);
-
- rand_string = generate_random_str(mem_ctx, 16);
- if (!rand_string) {
- talloc_free(mem_ctx);
- return ENOMEM;
- }
-
- keytab_name = talloc_asprintf(mem_ctx, "MEMORY:%s",
- rand_string);
- if (!keytab_name) {
- talloc_free(mem_ctx);
- return ENOMEM;
- }
-
- ret = smb_krb5_get_keytab_container(mem_ctx, smb_krb5_context, keytab_name, keytab_container);
- if (ret) {
- return ret;
- }
-
- msg = ldb_msg_new(mem_ctx);
- if (!msg) {
- talloc_free(mem_ctx);
+ *ktc = talloc(mem_ctx, struct keytab_container);
+ if (!*ktc) {
return ENOMEM;
}
- ldb_msg_add_string(msg, "krb5Keytab", keytab_name);
- ldb_msg_add_string(msg, "secret", cli_credentials_get_password(machine_account));
- ldb_msg_add_string(msg, "samAccountName", cli_credentials_get_username(machine_account));
- ldb_msg_add_string(msg, "realm", cli_credentials_get_realm(machine_account));
- ldb_msg_add_fmt(msg, "msDS-KeyVersionNumber", "%d", (int)cli_credentials_get_kvno(machine_account));
-
- ret = smb_krb5_update_keytab(mem_ctx, smb_krb5_context, NULL, msg, false, &error_string);
- if (ret == 0) {
- talloc_steal(parent_ctx, *keytab_container);
- } else {
- DEBUG(0, ("Failed to create in-memory keytab: %s\n", error_string));
- *keytab_container = NULL;
- }
- talloc_free(mem_ctx);
- return ret;
-}
-/* Translate between the IETF encryption type values and the Microsoft msDS-SupportedEncryptionTypes values */
-uint32_t kerberos_enctype_to_bitmap(krb5_enctype enc_type_enum)
-{
- switch (enc_type_enum) {
- case ENCTYPE_DES_CBC_CRC:
- return ENC_CRC32;
- case ENCTYPE_DES_CBC_MD5:
- return ENC_RSA_MD5;
- case ENCTYPE_ARCFOUR_HMAC_MD5:
- return ENC_RC4_HMAC_MD5;
- case ENCTYPE_AES128_CTS_HMAC_SHA1_96:
- return ENC_HMAC_SHA1_96_AES128;
- case ENCTYPE_AES256_CTS_HMAC_SHA1_96:
- return ENC_HMAC_SHA1_96_AES256;
- default:
- return 0;
- }
-}
-/* Translate between the Microsoft msDS-SupportedEncryptionTypes values and the IETF encryption type values */
-krb5_enctype kerberos_enctype_bitmap_to_enctype(uint32_t enctype_bitmap)
-{
- switch (enctype_bitmap) {
- case ENC_CRC32:
- return ENCTYPE_DES_CBC_CRC;
- case ENC_RSA_MD5:
- return ENCTYPE_DES_CBC_MD5;
- case ENC_RC4_HMAC_MD5:
- return ENCTYPE_ARCFOUR_HMAC_MD5;
- case ENC_HMAC_SHA1_96_AES128:
- return ENCTYPE_AES128_CTS_HMAC_SHA1_96;
- case ENC_HMAC_SHA1_96_AES256:
- return ENCTYPE_AES256_CTS_HMAC_SHA1_96;
- default:
- return 0;
- }
-}
+ (*ktc)->smb_krb5_context = talloc_reference(*ktc, smb_krb5_context);
+ (*ktc)->keytab = keytab;
+ (*ktc)->password_based = false;
+ talloc_set_destructor(*ktc, free_keytab_container);
-/* Return an array of krb5_enctype values */
-krb5_error_code kerberos_enctype_bitmap_to_enctypes(TALLOC_CTX *mem_ctx, uint32_t enctype_bitmap, krb5_enctype **enctypes)
-{
- unsigned int i, j = 0;
- *enctypes = talloc_zero_array(mem_ctx, krb5_enctype, (8*sizeof(enctype_bitmap))+1);
- if (!*enctypes) {
- return ENOMEM;
- }
- for (i=0; i<(8*sizeof(enctype_bitmap)); i++) {
- uint32_t bit_value = (1 << i) & enctype_bitmap;
- if (bit_value & enctype_bitmap) {
- (*enctypes)[j] = kerberos_enctype_bitmap_to_enctype(bit_value);
- if (!(*enctypes)[j]) {
- continue;
- }
- j++;
- }
- }
- (*enctypes)[j] = 0;
return 0;
}
git.samba.org / samba.git / blobdiff