diff options
Diffstat (limited to 'source4')
| -rw-r--r-- | source4/auth/credentials/credentials.h | 4 | ||||
| -rw-r--r-- | source4/auth/credentials/credentials_files.c | 14 | ||||
| -rw-r--r-- | source4/auth/credentials/credentials_krb5.c | 56 | ||||
| -rw-r--r-- | source4/auth/kerberos/kerberos.h | 6 | ||||
| -rw-r--r-- | source4/auth/kerberos/kerberos_util.c | 362 | ||||
| -rw-r--r-- | source4/dsdb/samdb/ldb_modules/update_keytab.c | 54 | ||||
| -rw-r--r-- | source4/param/secrets.c | 25 | ||||
| -rw-r--r-- | source4/param/secrets.h | 4 |
8 files changed, 286 insertions, 239 deletions
diff --git a/source4/auth/credentials/credentials.h b/source4/auth/credentials/credentials.h index b7a9540d86..b7023cd17b 100644 --- a/source4/auth/credentials/credentials.h +++ b/source4/auth/credentials/credentials.h @@ -142,6 +142,7 @@ struct cli_credentials { }; struct ldb_context; +struct ldb_message; struct loadparm_context; struct ccache_container; @@ -268,9 +269,6 @@ int cli_credentials_set_keytab_name(struct cli_credentials *cred, struct loadparm_context *lp_ctx, const char *keytab_name, enum credentials_obtained obtained); -int cli_credentials_update_keytab(struct cli_credentials *cred, - struct tevent_context *event_ctx, - struct loadparm_context *lp_ctx); void cli_credentials_set_gensec_features(struct cli_credentials *creds, uint32_t gensec_features); uint32_t cli_credentials_get_gensec_features(struct cli_credentials *creds); int cli_credentials_set_ccache(struct cli_credentials *cred, diff --git a/source4/auth/credentials/credentials_files.c b/source4/auth/credentials/credentials_files.c index 8ad395ddc8..e1990a8713 100644 --- a/source4/auth/credentials/credentials_files.c +++ b/source4/auth/credentials/credentials_files.c @@ -35,7 +35,6 @@ #include "lib/events/events.h" #include "dsdb/samdb/samdb.h" - /** * Read a file descriptor, and parse it for a password (eg from a file or stdin) * @@ -193,7 +192,7 @@ _PUBLIC_ NTSTATUS cli_credentials_set_secrets(struct cli_credentials *cred, const char *realm; enum netr_SchannelType sct; const char *salt_principal; - const char *keytab; + char *keytab; const struct ldb_val *whenChanged; /* ok, we are going to get it now, don't recurse back here */ @@ -310,17 +309,10 @@ _PUBLIC_ NTSTATUS cli_credentials_set_secrets(struct cli_credentials *cred, /* If there was an external keytab specified by reference in * the LDB, then use this. Otherwise we will make one up * (chewing CPU time) from the password */ - keytab = ldb_msg_find_attr_as_string(msg, "krb5Keytab", NULL); + keytab = keytab_name_from_msg(cred, ldb, msg); if (keytab) { cli_credentials_set_keytab_name(cred, event_ctx, lp_ctx, keytab, CRED_SPECIFIED); - } else { - keytab = ldb_msg_find_attr_as_string(msg, "privateKeytab", NULL); - if (keytab) { - keytab = talloc_asprintf(mem_ctx, "FILE:%s", samdb_relative_path(ldb, mem_ctx, keytab)); - if (keytab) { - cli_credentials_set_keytab_name(cred, event_ctx, lp_ctx, keytab, CRED_SPECIFIED); - } - } + talloc_free(keytab); } talloc_free(mem_ctx); diff --git a/source4/auth/credentials/credentials_krb5.c b/source4/auth/credentials/credentials_krb5.c index 4021146821..6e11a5fb02 100644 --- a/source4/auth/credentials/credentials_krb5.c +++ b/source4/auth/credentials/credentials_krb5.c @@ -595,7 +595,6 @@ _PUBLIC_ int cli_credentials_get_keytab(struct cli_credentials *cred, krb5_error_code ret; struct keytab_container *ktc; struct smb_krb5_context *smb_krb5_context; - const char **enctype_strings; TALLOC_CTX *mem_ctx; if (cred->keytab_obtained >= (MAX(cred->principal_obtained, @@ -619,11 +618,8 @@ _PUBLIC_ int cli_credentials_get_keytab(struct cli_credentials *cred, return ENOMEM; } - enctype_strings = cli_credentials_get_enctype_strings(cred); - ret = smb_krb5_create_memory_keytab(mem_ctx, cred, - smb_krb5_context, - enctype_strings, &ktc); + smb_krb5_context, &ktc); if (ret) { talloc_free(mem_ctx); return ret; @@ -682,41 +678,6 @@ _PUBLIC_ int cli_credentials_set_keytab_name(struct cli_credentials *cred, return ret; } -_PUBLIC_ int cli_credentials_update_keytab(struct cli_credentials *cred, - struct tevent_context *event_ctx, - struct loadparm_context *lp_ctx) -{ - krb5_error_code ret; - struct keytab_container *ktc; - struct smb_krb5_context *smb_krb5_context; - const char **enctype_strings; - TALLOC_CTX *mem_ctx; - - mem_ctx = talloc_new(cred); - if (!mem_ctx) { - return ENOMEM; - } - - ret = cli_credentials_get_krb5_context(cred, event_ctx, lp_ctx, &smb_krb5_context); - if (ret) { - talloc_free(mem_ctx); - return ret; - } - - enctype_strings = cli_credentials_get_enctype_strings(cred); - - ret = cli_credentials_get_keytab(cred, event_ctx, lp_ctx, &ktc); - if (ret != 0) { - talloc_free(mem_ctx); - return ret; - } - - ret = smb_krb5_update_keytab(mem_ctx, cred, smb_krb5_context, enctype_strings, ktc); - - talloc_free(mem_ctx); - return ret; -} - /* Get server gss credentials (in gsskrb5, this means the keytab) */ _PUBLIC_ int cli_credentials_get_server_gss_creds(struct cli_credentials *cred, @@ -810,21 +771,6 @@ _PUBLIC_ int cli_credentials_get_kvno(struct cli_credentials *cred) } -const char **cli_credentials_get_enctype_strings(struct cli_credentials *cred) -{ - /* If this is ever made user-configurable, we need to add code - * to remove/hide the other entries from the generated - * keytab */ - static const char *default_enctypes[] = { - "des-cbc-md5", - "aes256-cts-hmac-sha1-96", - "des3-cbc-sha1", - "arcfour-hmac-md5", - NULL - }; - return default_enctypes; -} - const char *cli_credentials_get_salt_principal(struct cli_credentials *cred) { return cred->salt_principal; diff --git a/source4/auth/kerberos/kerberos.h b/source4/auth/kerberos/kerberos.h index b58014f493..091242dc82 100644 --- a/source4/auth/kerberos/kerberos.h +++ b/source4/auth/kerberos/kerberos.h @@ -142,9 +142,15 @@ NTSTATUS kerberos_decode_pac(TALLOC_CTX *mem_ctx, time_t tgs_authtime, DATA_BLOB *pac); struct loadparm_context; +struct ldb_message; +struct ldb_context; uint32_t kerberos_enctype_to_bitmap(krb5_enctype enc_type_enum); /* Translate between the Microsoft msDS-SupportedEncryptionTypes values and the IETF encryption type values */ krb5_enctype kerberos_enctype_bitmap_to_enctype(uint32_t enctype_bitmap); +krb5_error_code smb_krb5_update_keytab(struct smb_krb5_context *smb_krb5_context, + struct ldb_context *ldb, + struct ldb_message *msg, + bool delete_all_kvno); #include "auth/kerberos/proto.h" diff --git a/source4/auth/kerberos/kerberos_util.c b/source4/auth/kerberos/kerberos_util.c index d77a51916f..dbe8c83865 100644 --- a/source4/auth/kerberos/kerberos_util.c +++ b/source4/auth/kerberos/kerberos_util.c @@ -27,6 +27,8 @@ #include "auth/credentials/credentials_proto.h" #include "auth/credentials/credentials_krb5.h" #include "auth/kerberos/kerberos_credentials.h" +#include "ldb.h" +#include "param/secrets.h" struct principal_container { struct smb_krb5_context *smb_krb5_context; @@ -77,51 +79,158 @@ static krb5_error_code parse_principal(TALLOC_CTX *parent_ctx, 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 principal_from_msg(TALLOC_CTX *parent_ctx, + struct ldb_message *msg, + struct smb_krb5_context *smb_krb5_context, + krb5_principal *principal, + char **_princ_string, + const char **error_string) { krb5_error_code ret; - char *machine_username; - char *salt_body; - char *lower_realm; - const char *salt_principal; - const char *error_string; + char *upper_realm; + const char *servicePrincipalName = ldb_msg_find_attr_as_string(msg, "servicePrincipalName", NULL); + 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 principal_container *mem_ctx = talloc(parent_ctx, struct principal_container); + TALLOC_CTX *tmp_ctx; + char *princ_string; if (!mem_ctx) { + *error_string = "Cannot allocate mem_ctx"; return ENOMEM; } - salt_principal = cli_credentials_get_salt_principal(machine_account); - if (salt_principal) { - ret = parse_principal(parent_ctx, salt_principal, smb_krb5_context, salt_princ, &error_string); + 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; + } + + upper_realm = strupper_talloc(tmp_ctx, realm); + if (!upper_realm) { + talloc_free(mem_ctx); + *error_string = "Cannot allocate full upper case realm"; + return ENOMEM; + } + + if (samAccountName) { + princ_string = talloc_asprintf(parent_ctx, "%s@%s", samAccountName, upper_realm); + if (!princ_string) { + *error_string = "Cannot allocate full samAccountName"; + return ENOMEM; + } + + ret = krb5_make_principal(smb_krb5_context->krb5_context, principal, upper_realm, samAccountName, + NULL); + } else if (servicePrincipalName) { + princ_string = talloc_asprintf(parent_ctx, "%s@%s", servicePrincipalName, upper_realm); + if (!princ_string) { + *error_string = "Cannot allocate full servicePrincipalName"; + return ENOMEM; + } + + ret = krb5_parse_name(smb_krb5_context->krb5_context, princ_string, principal); + } else { + *error_string = "Cannot have a kerberos secret without a samAccountName or servicePrinipcalName!"; + return EINVAL; + } + + 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 = *principal; + talloc_set_destructor(mem_ctx, free_principal); + if (_princ_string) { + *_princ_string = princ_string; + } } else { - machine_username = talloc_strdup(mem_ctx, cli_credentials_get_username(machine_account)); + (*error_string) = smb_get_krb5_error_message(smb_krb5_context->krb5_context, ret, parent_ctx); + } + + 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(mem_ctx, cli_credentials_get_realm(machine_account)); + + 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(mem_ctx, "%s.%s", machine_username, + 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); - return ENOMEM; + *error_string = "Cannot form salt principal body"; + return ENOMEM; } ret = krb5_make_principal(smb_krb5_context->krb5_context, salt_princ, - cli_credentials_get_realm(machine_account), + upper_realm, "host", salt_body, NULL); if (ret == 0) { /* This song-and-dance effectivly puts the principal @@ -129,10 +238,15 @@ static krb5_error_code salt_principal_from_credentials(TALLOC_CTX *parent_ctx, 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 { + /* Catch the servicePrincipalName case */ + return principal_from_msg(parent_ctx, msg, smb_krb5_context, salt_princ, NULL, error_string); } - - return ret; } /* Obtain the principal set on this context. Requires a @@ -140,7 +254,7 @@ static krb5_error_code salt_principal_from_credentials(TALLOC_CTX *parent_ctx, * 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, +krb5_error_code principal_from_credentials(TALLOC_CTX *parent_ctx, struct cli_credentials *credentials, struct smb_krb5_context *smb_krb5_context, krb5_principal *princ, @@ -371,7 +485,7 @@ static krb5_error_code keytab_add_keys(TALLOC_CTX *parent_ctx, int kvno, const char *password_s, struct smb_krb5_context *smb_krb5_context, - const char **enctype_strings, + krb5_enctype *enctypes, krb5_keytab keytab) { int i; @@ -385,20 +499,10 @@ static krb5_error_code keytab_add_keys(TALLOC_CTX *parent_ctx, password.data = discard_const_p(char *, password_s); password.length = strlen(password_s); - for (i=0; enctype_strings[i]; i++) { + for (i=0; enctypes[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); + salt_princ, &password, &entry.keyblock, enctypes[i]); if (ret != 0) { talloc_free(mem_ctx); return ret; @@ -408,8 +512,8 @@ static krb5_error_code keytab_add_keys(TALLOC_CTX *parent_ctx, 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], + DEBUG(1, ("Failed to add enctype %d entry for %s(kvno %d) to keytab: %s\n", + (int)enctypes[i], princ_string, kvno, smb_get_krb5_error_message(smb_krb5_context->krb5_context, @@ -419,9 +523,9 @@ static krb5_error_code keytab_add_keys(TALLOC_CTX *parent_ctx, return ret; } - DEBUG(5, ("Added %s(kvno %d) to keytab (%s)\n", + DEBUG(5, ("Added %s(kvno %d) to keytab (enctype %d)\n", princ_string, kvno, - enctype_strings[i])); + (int)enctypes[i])); krb5_free_keyblock_contents(smb_krb5_context->krb5_context, &entry.keyblock); } @@ -430,110 +534,65 @@ static krb5_error_code keytab_add_keys(TALLOC_CTX *parent_ctx, } 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) + struct ldb_message *msg, + struct smb_krb5_context *smb_krb5_context, + krb5_keytab keytab, + bool add_old) { krb5_error_code ret; const char *password_s; const char *old_secret; int kvno; + uint32_t enctype_bitmap; krb5_principal salt_princ; krb5_principal princ; - const char *princ_string; + char *princ_string; + krb5_enctype *enctypes; const char *error_string; - enum credentials_obtained obtained; 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, &obtained, &error_string); + ret = principal_from_msg(mem_ctx, msg, smb_krb5_context, &princ, &princ_string, &error_string); if (ret) { - DEBUG(1,("create_keytab: makeing krb5 principal failed (%s)\n", error_string)); + DEBUG(1,("create_keytab: getting krb5 principal from ldb message failed: %s\n", error_string)); 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); + ret = salt_principal_from_msg(mem_ctx, msg, + smb_krb5_context, + &salt_princ, &error_string); 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))); + error_string)); 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; - } + password_s = ldb_msg_find_attr_as_string(msg, "secret", NULL); + kvno = ldb_msg_find_attr_as_int(msg, "msDS-KeyVersionNumber", 0); - 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 */ + 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) { + DEBUG(1,("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 0; + return ret; } - - 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); + enctypes, keytab); if (!ret) { talloc_free(mem_ctx); return ret; @@ -544,15 +603,15 @@ static krb5_error_code create_keytab(TALLOC_CTX *parent_ctx, return 0; } - old_secret = cli_credentials_get_old_password(machine_account); + old_secret = ldb_msg_find_attr_as_string(msg, "priorSecret", NULL); 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); + enctypes, keytab); if (!ret) { talloc_free(mem_ctx); return ret; @@ -562,7 +621,6 @@ static krb5_error_code create_keytab(TALLOC_CTX *parent_ctx, return 0; } - /* * Walk the keytab, looking for entries of this principal name, with KVNO other than current kvno -1. * @@ -573,7 +631,8 @@ static krb5_error_code create_keytab(TALLOC_CTX *parent_ctx, */ static krb5_error_code remove_old_entries(TALLOC_CTX *parent_ctx, - struct cli_credentials *machine_account, + struct ldb_message *msg, + bool delete_all_kvno, struct smb_krb5_context *smb_krb5_context, krb5_keytab keytab, bool *found_previous) { @@ -582,26 +641,23 @@ static krb5_error_code remove_old_entries(TALLOC_CTX *parent_ctx, krb5_principal princ; int kvno; TALLOC_CTX *mem_ctx = talloc_new(parent_ctx); - const char *princ_string; + char *princ_string; const char *error_string; - enum credentials_obtained obtained; 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, &obtained, &error_string); + ret = principal_from_msg(mem_ctx, msg, smb_krb5_context, &princ, &princ_string, &error_string); if (ret) { - DEBUG(1,("update_keytab: makeing krb5 principal failed (%s)\n", error_string)); + DEBUG(1,("remove_old_entries: getting krb5 principal from ldb message failed: %s\n", error_string)); talloc_free(mem_ctx); return ret; } - kvno = cli_credentials_get_kvno(machine_account); + 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); @@ -694,34 +750,51 @@ static krb5_error_code remove_old_entries(TALLOC_CTX *parent_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 smb_krb5_update_keytab(struct smb_krb5_context *smb_krb5_context, + struct ldb_context *ldb, + struct ldb_message *msg, + bool delete_all_kvno) { krb5_error_code ret; bool found_previous; - TALLOC_CTX *mem_ctx = talloc_new(parent_ctx); + TALLOC_CTX *mem_ctx = talloc_new(NULL); + struct keytab_container *keytab_container; + const char *keytab_name; + if (!mem_ctx) { return ENOMEM; } - ret = remove_old_entries(mem_ctx, machine_account, + keytab_name = keytab_name_from_msg(mem_ctx, ldb, msg); + if (!keytab_name) { + return ENOENT; + } + + ret = smb_krb5_open_keytab(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)); + + ret = remove_old_entries(mem_ctx, msg, delete_all_kvno, 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); + 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, smb_krb5_context, + keytab_container->keytab, + found_previous ? false : true); + } talloc_free(mem_ctx); return ret; } @@ -729,13 +802,13 @@ krb5_error_code smb_krb5_update_keytab(TALLOC_CTX *parent_ctx, 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; + struct ldb_message *msg; if (!mem_ctx) { return ENOMEM; } @@ -760,7 +833,18 @@ krb5_error_code smb_krb5_create_memory_keytab(TALLOC_CTX *parent_ctx, return ret; } - ret = smb_krb5_update_keytab(mem_ctx, machine_account, smb_krb5_context, enctype_strings, *keytab_container); + msg = ldb_msg_new(mem_ctx); + if (!msg) { + talloc_free(mem_ctx); + 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(smb_krb5_context, NULL, msg, false); if (ret == 0) { talloc_steal(parent_ctx, *keytab_container); } else { @@ -769,7 +853,6 @@ krb5_error_code smb_krb5_create_memory_keytab(TALLOC_CTX *parent_ctx, 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) { @@ -812,7 +895,7 @@ krb5_enctype kerberos_enctype_bitmap_to_enctype(uint32_t enctype_bitmap) 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)); + *enctypes = talloc_zero_array(mem_ctx, krb5_enctype, (8*sizeof(enctype_bitmap))+1); if (!*enctypes) { return ENOMEM; } @@ -821,10 +904,11 @@ krb5_error_code kerberos_enctype_bitmap_to_enctypes(TALLOC_CTX *mem_ctx, uint32_ if (bit_value & enctype_bitmap) { (*enctypes)[j] = kerberos_enctype_bitmap_to_enctype(bit_value); if (!(*enctypes)[j]) { - return KRB5_PROG_ETYPE_NOSUPP; + continue; } j++; } } + (*enctypes)[j] = 0; return 0; } diff --git a/source4/dsdb/samdb/ldb_modules/update_keytab.c b/source4/dsdb/samdb/ldb_modules/update_keytab.c index 071974f5e4..86ced73b5d 100644 --- a/source4/dsdb/samdb/ldb_modules/update_keytab.c +++ b/source4/dsdb/samdb/ldb_modules/update_keytab.c @@ -33,9 +33,11 @@ #include "auth/credentials/credentials.h" #include "auth/credentials/credentials_krb5.h" #include "system/kerberos.h" +#include "auth/kerberos/kerberos.h" struct dn_list { - struct cli_credentials *creds; + struct ldb_message *msg; + bool do_delete; struct dn_list *prev, *next; }; @@ -81,11 +83,8 @@ static int add_modified(struct ldb_module *module, struct ldb_dn *dn, bool do_de struct update_kt_private *data = talloc_get_type(ldb_module_get_private(module), struct update_kt_private); struct dn_list *item; char *filter; - char *errstring; struct ldb_result *res; - const char *attrs[] = { NULL }; int ret; - NTSTATUS status; filter = talloc_asprintf(data, "(&(dn=%s)(&(objectClass=kerberosSecret)(privateKeytab=*)))", ldb_dn_get_linearized(dn)); @@ -94,9 +93,9 @@ static int add_modified(struct ldb_module *module, struct ldb_dn *dn, bool do_de } ret = ldb_search(ldb, data, &res, - dn, LDB_SCOPE_BASE, attrs, "%s", filter); + dn, LDB_SCOPE_BASE, NULL, "%s", filter); + talloc_free(filter); if (ret != LDB_SUCCESS) { - talloc_free(filter); return ret; } @@ -106,34 +105,19 @@ static int add_modified(struct ldb_module *module, struct ldb_dn *dn, bool do_de talloc_free(filter); return LDB_SUCCESS; } - talloc_free(res); item = talloc(data->changed_dns? (void *)data->changed_dns: (void *)data, struct dn_list); if (!item) { + talloc_free(res); talloc_free(filter); return ldb_oom(ldb); } - item->creds = cli_credentials_init(item); - if (!item->creds) { - DEBUG(1, ("cli_credentials_init failed!")); - talloc_free(filter); - return ldb_oom(ldb); - } + item->msg = talloc_steal(item, res->msgs[0]); + item->do_delete = do_delete; + talloc_free(res); - cli_credentials_set_conf(item->creds, ldb_get_opaque(ldb, "loadparm")); - status = cli_credentials_set_secrets(item->creds, ldb_get_event_context(ldb), ldb_get_opaque(ldb, "loadparm"), ldb, NULL, filter, &errstring); - talloc_free(filter); - if (NT_STATUS_IS_OK(status)) { - if (do_delete) { - /* Ensure we don't helpfully keep an old keytab entry */ - cli_credentials_set_kvno(item->creds, cli_credentials_get_kvno(item->creds)+2); - /* Wipe passwords */ - cli_credentials_set_nt_hash(item->creds, NULL, - CRED_SPECIFIED); - } - DLIST_ADD_END(data->changed_dns, item, struct dn_list *); - } + DLIST_ADD_END(data->changed_dns, item, struct dn_list *); return LDB_SUCCESS; } @@ -379,19 +363,27 @@ static int update_kt_rename(struct ldb_module *module, struct ldb_request *req) /* prepare for a commit */ static int update_kt_prepare_commit(struct ldb_module *module) { - struct ldb_context *ldb; + struct ldb_context *ldb = ldb_module_get_ctx(module); struct update_kt_private *data = talloc_get_type(ldb_module_get_private(module), struct update_kt_private); struct dn_list *p; + struct smb_krb5_context *smb_krb5_context; + int krb5_ret = smb_krb5_init_context(data, ldb_get_event_context(ldb), ldb_get_opaque(ldb, "loadparm"), + &smb_krb5_context); + if (krb5_ret != 0) { + talloc_free(data->changed_dns); + data->changed_dns = NULL; + ldb_asprintf_errstring(ldb, "Failed to setup krb5_context: %s", error_message(krb5_ret)); + return LDB_ERR_OPERATIONS_ERROR; + } ldb = ldb_module_get_ctx(module); for (p=data->changed_dns; p; p = p->next) { - int kret; - kret = cli_credentials_update_keytab(p->creds, ldb_get_event_context(ldb), ldb_get_opaque(ldb, "loadparm")); - if (kret != 0) { + krb5_ret = smb_krb5_update_keytab(smb_krb5_context, ldb, p->msg, p->do_delete); + if (krb5_ret != 0) { talloc_free(data->changed_dns); data->changed_dns = NULL; - ldb_asprintf_errstring(ldb, "Failed to update keytab: %s", error_message(kret)); + ldb_asprintf_errstring(ldb, "Failed to update keytab: %s", error_message(krb5_ret)); return LDB_ERR_OPERATIONS_ERROR; } } diff --git a/source4/param/secrets.c b/source4/param/secrets.c index f6ab5e93fb..5e9b0a977f 100644 --- a/source4/param/secrets.c +++ b/source4/param/secrets.c @@ -167,3 +167,28 @@ struct dom_sid *secrets_get_domain_sid(TALLOC_CTX *mem_ctx, return result; } + +char *keytab_name_from_msg(TALLOC_CTX *mem_ctx, struct ldb_context *ldb, struct ldb_message *msg) +{ + const char *krb5keytab = ldb_msg_find_attr_as_string(msg, "krb5Keytab", NULL); + if (krb5keytab) { + return talloc_strdup(mem_ctx, krb5keytab); + } else { + char *file_keytab; + char *relative_path; + const char *privateKeytab = ldb_msg_find_attr_as_string(msg, "privateKeytab", NULL); + if (!privateKeytab) { + return NULL; + } + + relative_path = samdb_relative_path(ldb, mem_ctx, privateKeytab); + if (!relative_path) { + return NULL; + } + file_keytab = talloc_asprintf(mem_ctx, "FILE:%s", relative_path); + talloc_free(relative_path); + return file_keytab; + } + return NULL; +} + diff --git a/source4/param/secrets.h b/source4/param/secrets.h index 018bd36337..49fe8c31c7 100644 --- a/source4/param/secrets.h +++ b/source4/param/secrets.h @@ -39,6 +39,9 @@ struct loadparm_context; struct tevent_context; enum netr_SchannelType; +struct ldb_message; +struct ldb_context; + struct tdb_wrap *secrets_init(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx); struct ldb_context *secrets_db_connect(TALLOC_CTX *mem_ctx, struct tevent_context *ev_ctx, struct loadparm_context *lp_ctx); struct dom_sid *secrets_get_domain_sid(TALLOC_CTX *mem_ctx, @@ -47,6 +50,7 @@ struct dom_sid *secrets_get_domain_sid(TALLOC_CTX *mem_ctx, const char *domain, enum netr_SchannelType *sec_channel_type, char **errstring); +char *keytab_name_from_msg(TALLOC_CTX *mem_ctx, struct ldb_context *ldb, struct ldb_message *msg); #endif /* _SECRETS_H */ |