#include "auth/credentials/credentials.h"
#include "auth/credentials/credentials_proto.h"
#include "auth/credentials/credentials_krb5.h"
+#include "auth/kerberos/kerberos_credentials.h"
+#include "auth/kerberos/kerberos_util.h"
struct principal_container {
struct smb_krb5_context *smb_krb5_context;
krb5_principal principal;
+ const char *string_form; /* Optional */
};
static krb5_error_code free_principal(struct principal_container *pc)
return 0;
}
-static krb5_error_code salt_principal_from_credentials(TALLOC_CTX *parent_ctx,
- struct cli_credentials *machine_account,
- struct smb_krb5_context *smb_krb5_context,
- krb5_principal *salt_princ)
+
+static krb5_error_code parse_principal(TALLOC_CTX *parent_ctx,
+ const char *princ_string,
+ struct smb_krb5_context *smb_krb5_context,
+ krb5_principal *princ,
+ const char **error_string)
{
- krb5_error_code ret;
- char *machine_username;
- char *salt_body;
- char *lower_realm;
- const char *salt_principal;
- struct principal_container *mem_ctx = talloc(parent_ctx, struct principal_container);
- if (!mem_ctx) {
- return ENOMEM;
+ int ret;
+ struct principal_container *mem_ctx;
+ if (princ_string == NULL) {
+ *princ = NULL;
+ return 0;
}
- salt_principal = cli_credentials_get_salt_principal(machine_account);
- if (salt_principal) {
- ret = krb5_parse_name(smb_krb5_context->krb5_context, salt_principal, salt_princ);
- } else {
- machine_username = talloc_strdup(mem_ctx, cli_credentials_get_username(machine_account));
-
- if (!machine_username) {
- talloc_free(mem_ctx);
- return ENOMEM;
- }
-
- if (machine_username[strlen(machine_username)-1] == '$') {
- machine_username[strlen(machine_username)-1] = '\0';
- }
- lower_realm = strlower_talloc(mem_ctx, cli_credentials_get_realm(machine_account));
- if (!lower_realm) {
- talloc_free(mem_ctx);
- return ENOMEM;
- }
-
- salt_body = talloc_asprintf(mem_ctx, "%s.%s", machine_username,
- lower_realm);
- if (!salt_body) {
- talloc_free(mem_ctx);
- return ENOMEM;
- }
-
- ret = krb5_make_principal(smb_krb5_context->krb5_context, salt_princ,
- cli_credentials_get_realm(machine_account),
- "host", salt_body, NULL);
- }
+ ret = krb5_parse_name(smb_krb5_context->krb5_context,
+ princ_string, princ);
- if (ret == 0) {
- /* 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->principal = *salt_princ;
- talloc_set_destructor(mem_ctx, free_principal);
+ if (ret) {
+ (*error_string) = smb_get_krb5_error_message(
+ smb_krb5_context->krb5_context,
+ ret, parent_ctx);
+ return ret;
}
- return ret;
+
+ mem_ctx = talloc(parent_ctx, struct principal_container);
+ if (!mem_ctx) {
+ (*error_string) = error_message(ENOMEM);
+ return ENOMEM;
+ }
+
+ /* 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->principal = *princ;
+ talloc_set_destructor(mem_ctx, free_principal);
+ return 0;
}
/* Obtain the principal set on this context. Requires a
* 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)
+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;
- struct principal_container *mem_ctx = talloc(parent_ctx, struct principal_container);
+ 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(credentials, mem_ctx);
-
- /* A NULL here has meaning, as the gssapi server case will
- * then use the principal from the client */
+ princ_string = cli_credentials_get_principal_and_obtained(credentials,
+ mem_ctx,
+ obtained);
if (!princ_string) {
- talloc_free(mem_ctx);
- princ = NULL;
+ *princ = NULL;
return 0;
}
- ret = krb5_parse_name(smb_krb5_context->krb5_context,
- princ_string, princ);
-
- if (ret == 0) {
- /* 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->principal = *princ;
- talloc_set_destructor(mem_ctx, free_principal);
- }
+ ret = parse_principal(parent_ctx, princ_string,
+ smb_krb5_context, princ, error_string);
+ talloc_free(mem_ctx);
return ret;
}
+/* 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). */
+
+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);
+}
+
/**
* Return a freshly allocated ccache (destroyed by destructor on child
* of parent_ctx), for a given set of client credentials
krb5_error_code kinit_to_ccache(TALLOC_CTX *parent_ctx,
struct cli_credentials *credentials,
struct smb_krb5_context *smb_krb5_context,
- krb5_ccache ccache)
+ struct tevent_context *event_ctx,
+ krb5_ccache ccache,
+ enum credentials_obtained *obtained,
+ const char **error_string)
{
krb5_error_code ret;
const char *password;
+ const char *self_service;
+ const char *target_service;
time_t kdc_time = 0;
krb5_principal princ;
+ krb5_principal impersonate_principal;
int tries;
TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
+ krb5_get_init_creds_opt *krb_options;
if (!mem_ctx) {
+ (*error_string) = strerror(ENOMEM);
return ENOMEM;
}
- ret = principal_from_credentials(mem_ctx, credentials, smb_krb5_context, &princ);
+ ret = principal_from_credentials(mem_ctx, credentials, smb_krb5_context, &princ, obtained, error_string);
if (ret) {
talloc_free(mem_ctx);
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;
+ }
+
+ self_service = cli_credentials_get_self_service(credentials);
+ target_service = cli_credentials_get_target_service(credentials);
+
password = cli_credentials_get_password(credentials);
+ /* setup the krb5 options we want */
+ if ((ret = krb5_get_init_creds_opt_alloc(smb_krb5_context->krb5_context, &krb_options))) {
+ (*error_string) = talloc_asprintf(credentials, "krb5_get_init_creds_opt_alloc failed (%s)\n",
+ smb_get_krb5_error_message(smb_krb5_context->krb5_context,
+ ret, mem_ctx));
+ 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;
+ case CRED_NO_KRB_FORWARDABLE:
+ krb5_get_init_creds_opt_set_forwardable(krb_options, FALSE);
+ break;
+ case CRED_FORCE_KRB_FORWARDABLE:
+ krb5_get_init_creds_opt_set_forwardable(krb_options, TRUE);
+ 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;
+ */
+ krb5_get_init_creds_opt_set_win2k(smb_krb5_context->krb5_context,
+ krb_options, true);
+#endif
+
tries = 2;
while (tries--) {
+ struct tevent_context *previous_ev;
+ /* Do this every time, in case we have weird recursive issues here */
+#ifdef SAMBA4_USES_HEIMDAL
+ ret = smb_krb5_context_set_event_ctx(smb_krb5_context, event_ctx, &previous_ev);
+ if (ret) {
+ talloc_free(mem_ctx);
+ return ret;
+ }
+#endif
if (password) {
- ret = kerberos_kinit_password_cc(smb_krb5_context->krb5_context, ccache,
- princ,
- password, 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";
+ return EINVAL;
} else {
/* No password available, try to use a keyblock instead */
mach_pwd = cli_credentials_get_nt_hash(credentials, mem_ctx);
if (!mach_pwd) {
talloc_free(mem_ctx);
- DEBUG(1, ("kinit_to_ccache: No password available for kinit\n"));
+ (*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,
- ETYPE_ARCFOUR_HMAC_MD5,
+ ENCTYPE_ARCFOUR_HMAC,
mach_pwd->hash, sizeof(mach_pwd->hash),
&keyblock);
if (ret == 0) {
ret = kerberos_kinit_keyblock_cc(smb_krb5_context->krb5_context, ccache,
- princ,
- &keyblock, NULL, &kdc_time);
+ princ, &keyblock,
+ target_service, krb_options,
+ NULL, &kdc_time);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context, &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 */
time_t t = time(NULL);
}
}
+ krb5_get_init_creds_opt_free(smb_krb5_context->krb5_context, krb_options);
+
if (ret == KRB5KRB_AP_ERR_SKEW || ret == KRB5_KDCREP_SKEW) {
- DEBUG(1,("kinit for %s failed (%s)\n",
- cli_credentials_get_principal(credentials, mem_ctx),
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx)));
+ (*error_string) = talloc_asprintf(credentials, "kinit for %s failed (%s)\n",
+ cli_credentials_get_principal(credentials, mem_ctx),
+ smb_get_krb5_error_message(smb_krb5_context->krb5_context,
+ ret, mem_ctx));
talloc_free(mem_ctx);
return ret;
}
ret = kinit_to_ccache(parent_ctx,
credentials,
smb_krb5_context,
- ccache);
+ event_ctx,
+ ccache, obtained,
+ error_string);
}
+
if (ret) {
- DEBUG(1,("kinit for %s failed (%s)\n",
- cli_credentials_get_principal(credentials, mem_ctx),
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx)));
+ (*error_string) = talloc_asprintf(credentials, "kinit for %s failed (%s)\n",
+ cli_credentials_get_principal(credentials, mem_ctx),
+ smb_get_krb5_error_message(smb_krb5_context->krb5_context,
+ ret, mem_ctx));
talloc_free(mem_ctx);
return ret;
}
return 0;
}
-static krb5_error_code free_keytab(struct keytab_container *ktc)
+static krb5_error_code free_keytab_container(struct keytab_container *ktc)
{
- krb5_kt_close(ktc->smb_krb5_context->krb5_context, ktc->keytab);
-
- return 0;
+ return krb5_kt_close(ktc->smb_krb5_context->krb5_context, ktc->keytab);
}
-krb5_error_code smb_krb5_open_keytab(TALLOC_CTX *mem_ctx,
- struct smb_krb5_context *smb_krb5_context,
- const char *keytab_name, struct keytab_container **ktc)
+krb5_error_code smb_krb5_get_keytab_container(TALLOC_CTX *mem_ctx,
+ 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;
+
+ if (opt_keytab) {
+ keytab = opt_keytab;
+ } else {
+ 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);
(*ktc)->smb_krb5_context = talloc_reference(*ktc, smb_krb5_context);
(*ktc)->keytab = keytab;
- talloc_set_destructor(*ktc, free_keytab);
+ talloc_set_destructor(*ktc, free_keytab_container);
return 0;
}
-
-static krb5_error_code keytab_add_keys(TALLOC_CTX *parent_ctx,
- const char *princ_string,
- krb5_principal princ,
- krb5_principal salt_princ,
- int kvno,
- const char *password_s,
- struct smb_krb5_context *smb_krb5_context,
- const char **enctype_strings,
- krb5_keytab keytab)
-{
- int i;
- krb5_error_code ret;
- krb5_data password;
- TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
- if (!mem_ctx) {
- return ENOMEM;
- }
-
- password.data = discard_const_p(char *, password_s);
- password.length = strlen(password_s);
-
- for (i=0; enctype_strings[i]; i++) {
- krb5_keytab_entry entry;
- krb5_enctype enctype;
- ret = krb5_string_to_enctype(smb_krb5_context->krb5_context, enctype_strings[i], &enctype);
- if (ret != 0) {
- DEBUG(1, ("Failed to interpret %s as a krb5 encryption type: %s\n",
- enctype_strings[i],
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx)));
- talloc_free(mem_ctx);
- return ret;
- }
- ret = create_kerberos_key_from_string(smb_krb5_context->krb5_context,
- salt_princ, &password, &entry.keyblock, enctype);
- if (ret != 0) {
- talloc_free(mem_ctx);
- return ret;
- }
-
- entry.principal = princ;
- entry.vno = kvno;
- ret = krb5_kt_add_entry(smb_krb5_context->krb5_context, keytab, &entry);
- if (ret != 0) {
- DEBUG(1, ("Failed to add %s entry for %s(kvno %d) to keytab: %s\n",
- enctype_strings[i],
- princ_string,
- kvno,
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx)));
- talloc_free(mem_ctx);
- krb5_free_keyblock_contents(smb_krb5_context->krb5_context, &entry.keyblock);
- return ret;
- }
-
- DEBUG(5, ("Added %s(kvno %d) to keytab (%s)\n",
- princ_string, kvno,
- enctype_strings[i]));
-
- krb5_free_keyblock_contents(smb_krb5_context->krb5_context, &entry.keyblock);
- }
- talloc_free(mem_ctx);
- return 0;
-}
-
-static krb5_error_code create_keytab(TALLOC_CTX *parent_ctx,
- struct cli_credentials *machine_account,
- struct smb_krb5_context *smb_krb5_context,
- const char **enctype_strings,
- krb5_keytab keytab,
- bool add_old)
-{
- krb5_error_code ret;
- const char *password_s;
- const char *old_secret;
- int kvno;
- krb5_principal salt_princ;
- krb5_principal princ;
- const char *princ_string;
-
- TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
- if (!mem_ctx) {
- return ENOMEM;
- }
-
- princ_string = cli_credentials_get_principal(machine_account, mem_ctx);
- /* Get the principal we will store the new keytab entries under */
- ret = principal_from_credentials(mem_ctx, machine_account, smb_krb5_context, &princ);
- if (ret) {
- DEBUG(1,("create_keytab: makeing krb5 principal failed (%s)\n",
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx)));
- talloc_free(mem_ctx);
- return ret;
- }
-
- /* The salt used to generate these entries may be different however, fetch that */
- ret = salt_principal_from_credentials(mem_ctx, machine_account,
- smb_krb5_context,
- &salt_princ);
- if (ret) {
- DEBUG(1,("create_keytab: makeing salt principal failed (%s)\n",
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx)));
- talloc_free(mem_ctx);
- return ret;
- }
-
- /* Finally, do the dance to get the password to put in the entry */
- password_s = cli_credentials_get_password(machine_account);
- if (!password_s) {
- krb5_keytab_entry entry;
- const struct samr_Password *mach_pwd;
-
- if (!str_list_check(enctype_strings, "arcfour-hmac-md5")) {
- DEBUG(1, ("Asked to create keytab, but with only an NT hash supplied, "
- "but not listing arcfour-hmac-md5 as an enc type to include in the keytab!\n"));
- talloc_free(mem_ctx);
- return EINVAL;
- }
-
- /* If we don't have the plaintext password, try for
- * the MD4 password hash */
- mach_pwd = cli_credentials_get_nt_hash(machine_account, mem_ctx);
- if (!mach_pwd) {
- /* OK, nothing to do here */
- talloc_free(mem_ctx);
- return 0;
- }
- ret = krb5_keyblock_init(smb_krb5_context->krb5_context,
- ETYPE_ARCFOUR_HMAC_MD5,
- mach_pwd->hash, sizeof(mach_pwd->hash),
- &entry.keyblock);
- if (ret) {
- DEBUG(1, ("create_keytab: krb5_keyblock_init failed: %s\n",
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx)));
- talloc_free(mem_ctx);
- return ret;
- }
-
- entry.principal = princ;
- entry.vno = cli_credentials_get_kvno(machine_account);
- ret = krb5_kt_add_entry(smb_krb5_context->krb5_context, keytab, &entry);
- if (ret) {
- DEBUG(1, ("Failed to add ARCFOUR_HMAC (only) entry for %s to keytab: %s",
- cli_credentials_get_principal(machine_account, mem_ctx),
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx)));
- talloc_free(mem_ctx);
- krb5_free_keyblock_contents(smb_krb5_context->krb5_context, &entry.keyblock);
- return ret;
- }
-
- DEBUG(5, ("Added %s(kvno %d) to keytab (arcfour-hmac-md5)\n",
- cli_credentials_get_principal(machine_account, mem_ctx),
- cli_credentials_get_kvno(machine_account)));
-
- krb5_free_keyblock_contents(smb_krb5_context->krb5_context, &entry.keyblock);
-
- /* Can't go any further, we only have this one key */
- talloc_free(mem_ctx);
- return 0;
- }
-
- kvno = cli_credentials_get_kvno(machine_account);
- /* good, we actually have the real plaintext */
- ret = keytab_add_keys(mem_ctx, princ_string, princ, salt_princ,
- kvno, password_s, smb_krb5_context,
- enctype_strings, keytab);
- if (!ret) {
- talloc_free(mem_ctx);
- return ret;
- }
-
- if (!add_old || kvno == 0) {
- talloc_free(mem_ctx);
- return 0;
- }
-
- old_secret = cli_credentials_get_old_password(machine_account);
- if (!old_secret) {
- talloc_free(mem_ctx);
- return 0;
- }
-
- ret = keytab_add_keys(mem_ctx, princ_string, princ, salt_princ,
- kvno - 1, old_secret, smb_krb5_context,
- enctype_strings, keytab);
- if (!ret) {
- talloc_free(mem_ctx);
- return ret;
- }
-
- talloc_free(mem_ctx);
- return 0;
-}
-
-
-/*
- * 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 cli_credentials *machine_account,
- struct smb_krb5_context *smb_krb5_context,
- krb5_keytab keytab, bool *found_previous)
-{
- krb5_error_code ret, ret2;
- krb5_kt_cursor cursor;
- krb5_principal princ;
- int kvno;
- TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
- const char *princ_string;
- if (!mem_ctx) {
- return ENOMEM;
- }
-
- *found_previous = false;
- princ_string = cli_credentials_get_principal(machine_account, mem_ctx);
-
- /* Get the principal we will store the new keytab entries under */
- ret = principal_from_credentials(mem_ctx, machine_account, smb_krb5_context, &princ);
- if (ret) {
- DEBUG(1,("update_keytab: makeing krb5 principal failed (%s)\n",
- smb_get_krb5_error_message(smb_krb5_context->krb5_context,
- ret, mem_ctx)));
- talloc_free(mem_ctx);
- return ret;
- }
-
- kvno = cli_credentials_get_kvno(machine_account);
-
- /* 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:
- DEBUG(1,("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) {
- krb5_keytab_entry entry;
- ret = krb5_kt_next_entry(smb_krb5_context->krb5_context, keytab, &entry, &cursor);
- if (ret) {
- break;
- }
- /* if it matches our principal */
- if (!krb5_kt_compare(smb_krb5_context->krb5_context, &entry, princ, 0, 0)) {
- /* 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 consistant.
- *
- * 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:
- DEBUG(1,("failed in deleting old entries for principal: %s: %s\n",
- princ_string,
- 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 cli_credentials *machine_account,
- struct smb_krb5_context *smb_krb5_context,
- const char **enctype_strings,
- struct keytab_container *keytab_container)
-{
- krb5_error_code ret;
- bool found_previous;
- TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
- if (!mem_ctx) {
- return ENOMEM;
- }
-
- ret = remove_old_entries(mem_ctx, machine_account,
- smb_krb5_context, keytab_container->keytab, &found_previous);
- if (ret != 0) {
- talloc_free(mem_ctx);
- return ret;
- }
-
- /* 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, machine_account, smb_krb5_context,
- enctype_strings,
- keytab_container->keytab,
- found_previous ? false : true);
- 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,
- const char **enctype_strings,
- 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;
- 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_open_keytab(mem_ctx, smb_krb5_context, keytab_name, keytab_container);
- if (ret) {
- return ret;
- }
-
- ret = smb_krb5_update_keytab(mem_ctx, machine_account, smb_krb5_context, enctype_strings, *keytab_container);
- if (ret == 0) {
- talloc_steal(parent_ctx, *keytab_container);
- } else {
- *keytab_container = NULL;
- }
- talloc_free(mem_ctx);
- return ret;
-}
-
git.samba.org / idra / samba.git / blobdiff