diff options
| -rw-r--r-- | source4/dsdb/samdb/ldb_modules/password_hash.c | 219 |
1 files changed, 216 insertions, 3 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/password_hash.c b/source4/dsdb/samdb/ldb_modules/password_hash.c index 8d63aed0f5..413ec12479 100644 --- a/source4/dsdb/samdb/ldb_modules/password_hash.c +++ b/source4/dsdb/samdb/ldb_modules/password_hash.c @@ -141,6 +141,8 @@ struct setup_password_fields_io { uint32_t lm_history_len; struct samr_Password *lm_history; const char *salt; + DATA_BLOB aes_256; + DATA_BLOB aes_128; DATA_BLOB des_md5; DATA_BLOB des_crc; struct ldb_val supplemental; @@ -316,6 +318,56 @@ static int setup_kerberos_keys(struct setup_password_fields_io *io) salt.saltvalue.length = strlen(io->g.salt); /* + * create ENCTYPE_AES256_CTS_HMAC_SHA1_96 key out of + * the salt and the cleartext password + */ + krb5_ret = krb5_string_to_key_salt(io->smb_krb5_context->krb5_context, + ENCTYPE_AES256_CTS_HMAC_SHA1_96, + io->n.cleartext, + salt, + &key); + if (krb5_ret) { + ldb_asprintf_errstring(io->ac->module->ldb, + "setup_kerberos_keys: " + "generation of a aes256-cts-hmac-sha1-96 key failed: %s", + smb_get_krb5_error_message(io->smb_krb5_context->krb5_context, krb5_ret, io->ac)); + return LDB_ERR_OPERATIONS_ERROR; + } + io->g.aes_256 = data_blob_talloc(io->ac, + key.keyvalue.data, + key.keyvalue.length); + krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key); + if (!io->g.aes_256.data) { + ldb_oom(io->ac->module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + + /* + * create ENCTYPE_AES128_CTS_HMAC_SHA1_96 key out of + * the salt and the cleartext password + */ + krb5_ret = krb5_string_to_key_salt(io->smb_krb5_context->krb5_context, + ENCTYPE_AES128_CTS_HMAC_SHA1_96, + io->n.cleartext, + salt, + &key); + if (krb5_ret) { + ldb_asprintf_errstring(io->ac->module->ldb, + "setup_kerberos_keys: " + "generation of a aes128-cts-hmac-sha1-96 key failed: %s", + smb_get_krb5_error_message(io->smb_krb5_context->krb5_context, krb5_ret, io->ac)); + return LDB_ERR_OPERATIONS_ERROR; + } + io->g.aes_128 = data_blob_talloc(io->ac, + key.keyvalue.data, + key.keyvalue.length); + krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key); + if (!io->g.aes_128.data) { + ldb_oom(io->ac->module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + + /* * create ENCTYPE_DES_CBC_MD5 key out of * the salt and the cleartext password */ @@ -467,6 +519,117 @@ static int setup_primary_kerberos(struct setup_password_fields_io *io, return LDB_SUCCESS; } +static int setup_primary_kerberos_newer(struct setup_password_fields_io *io, + const struct supplementalCredentialsBlob *old_scb, + struct package_PrimaryKerberosNewerBlob *pkb) +{ + struct package_PrimaryKerberosNewerCtr4 *pkb4 = &pkb->ctr.ctr4; + struct supplementalCredentialsPackage *old_scp = NULL; + struct package_PrimaryKerberosNewerBlob _old_pkb; + struct package_PrimaryKerberosNewerCtr4 *old_pkb4 = NULL; + uint32_t i; + enum ndr_err_code ndr_err; + + /* + * prepare generation of keys + * + * ENCTYPE_AES256_CTS_HMAC_SHA1_96 + * ENCTYPE_AES128_CTS_HMAC_SHA1_96 + * ENCTYPE_DES_CBC_MD5 + * ENCTYPE_DES_CBC_CRC + */ + pkb4->salt.string = io->g.salt; + pkb4->num_keys = 4; + pkb4->keys = talloc_array(io->ac, + struct package_PrimaryKerberosNewerKey, + pkb4->num_keys); + if (!pkb4->keys) { + ldb_oom(io->ac->module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + + pkb4->keys[0].keytype = ENCTYPE_AES256_CTS_HMAC_SHA1_96; + pkb4->keys[0].value = &io->g.aes_256; + pkb4->keys[1].keytype = ENCTYPE_AES128_CTS_HMAC_SHA1_96; + pkb4->keys[1].value = &io->g.aes_128; + pkb4->keys[2].keytype = ENCTYPE_DES_CBC_MD5; + pkb4->keys[2].value = &io->g.des_md5; + pkb4->keys[3].keytype = ENCTYPE_DES_CBC_CRC; + pkb4->keys[3].value = &io->g.des_crc; + + /* initialize the old keys to zero */ + pkb4->num_old_keys1 = 0; + pkb4->old_keys1 = NULL; + pkb4->num_old_keys2 = 0; + pkb4->old_keys2 = NULL; + + /* if there're no old keys, then we're done */ + if (!old_scb) { + return LDB_SUCCESS; + } + + for (i=0; i < old_scb->sub.num_packages; i++) { + if (strcmp("Primary:Kerberos-Newer-Keys", old_scb->sub.packages[i].name) != 0) { + continue; + } + + if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) { + continue; + } + + old_scp = &old_scb->sub.packages[i]; + break; + } + /* Primary:Kerberos element of supplementalCredentials */ + if (old_scp) { + DATA_BLOB blob; + + blob = strhex_to_data_blob(old_scp->data); + if (!blob.data) { + ldb_oom(io->ac->module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + talloc_steal(io->ac, blob.data); + + /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */ + ndr_err = ndr_pull_struct_blob(&blob, io->ac, + lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")), + &_old_pkb, + (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosNewerBlob); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + NTSTATUS status = ndr_map_error2ntstatus(ndr_err); + ldb_asprintf_errstring(io->ac->module->ldb, + "setup_primary_kerberos_newer: " + "failed to pull old package_PrimaryKerberosNewerBlob: %s", + nt_errstr(status)); + return LDB_ERR_OPERATIONS_ERROR; + } + + if (_old_pkb.version != 4) { + ldb_asprintf_errstring(io->ac->module->ldb, + "setup_primary_kerberos: " + "package_PrimaryKerberosNewerBlob version[%u] expected[4]", + _old_pkb.version); + return LDB_ERR_OPERATIONS_ERROR; + } + + old_pkb4 = &_old_pkb.ctr.ctr4; + } + + /* if we didn't found the old keys we're done */ + if (!old_pkb4) { + return LDB_SUCCESS; + } + + /* fill in the old keys */ + pkb4->num_old_keys1 = old_pkb4->num_keys; + pkb4->old_keys1 = old_pkb4->keys; + pkb4->num_old_keys2 = old_pkb4->num_old_keys1; + pkb4->old_keys2 = old_pkb4->old_keys1; + + return LDB_SUCCESS; +} + static int setup_primary_wdigest(struct setup_password_fields_io *io, const struct supplementalCredentialsBlob *old_scb, struct package_PrimaryWDigestBlob *pdb) @@ -804,16 +967,22 @@ static int setup_supplemental_field(struct setup_password_fields_io *io) struct supplementalCredentialsBlob scb; struct supplementalCredentialsBlob _old_scb; struct supplementalCredentialsBlob *old_scb = NULL; - /* Packages + (Kerberos, WDigest and CLEARTEXT) */ + /* Packages + (Kerberos-Newer-Keys, Kerberos, WDigest and CLEARTEXT) */ uint32_t num_names = 0; - const char *names[1+3]; + const char *names[1+4]; uint32_t num_packages = 0; - struct supplementalCredentialsPackage packages[1+3]; + struct supplementalCredentialsPackage packages[1+4]; /* Packages */ struct supplementalCredentialsPackage *pp = NULL; struct package_PackagesBlob pb; DATA_BLOB pb_blob; char *pb_hexstr; + /* Primary:Kerberos-Newer-Keys */ + const char **nkn = NULL; + struct supplementalCredentialsPackage *pkn = NULL; + struct package_PrimaryKerberosNewerBlob pknb; + DATA_BLOB pknb_blob; + char *pknb_hexstr; /* Primary:Kerberos */ const char **nk = NULL; struct supplementalCredentialsPackage *pk = NULL; @@ -835,6 +1004,7 @@ static int setup_supplemental_field(struct setup_password_fields_io *io) int ret; enum ndr_err_code ndr_err; uint8_t zero16[16]; + bool do_newer_keys = false; bool do_cleartext = false; ZERO_STRUCT(zero16); @@ -873,6 +1043,10 @@ static int setup_supplemental_field(struct setup_password_fields_io *io) } } + /* TODO: do the correct check for this, it maybe depends on the functional level? */ + do_newer_keys = lp_parm_bool(ldb_get_opaque(io->ac->module->ldb, "loadparm"), + NULL, "password_hash", "create_aes_key", false); + if (io->domain->store_cleartext && (io->u.user_account_control & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED)) { do_cleartext = true; @@ -881,6 +1055,7 @@ static int setup_supplemental_field(struct setup_password_fields_io *io) /* * The ordering is this * + * Primary:Kerberos-Newer-Keys (optional) * Primary:Kerberos * Primary:WDigest * Primary:CLEARTEXT (optional) @@ -888,6 +1063,11 @@ static int setup_supplemental_field(struct setup_password_fields_io *io) * And the 'Packages' package is insert before the last * other package. */ + if (do_newer_keys) { + /* Primary:Kerberos-Newer-Keys */ + nkn = &names[num_names++]; + pkn = &packages[num_packages++]; + } /* Primary:Kerberos */ nk = &names[num_names++]; @@ -911,6 +1091,39 @@ static int setup_supplemental_field(struct setup_password_fields_io *io) pc = &packages[num_packages++]; } + if (pkn) { + /* + * setup 'Primary:Kerberos-Newer-Keys' element + */ + *nkn = "Kerberos-Newer-Keys"; + + ret = setup_primary_kerberos_newer(io, old_scb, &pknb); + if (ret != LDB_SUCCESS) { + return ret; + } + + ndr_err = ndr_push_struct_blob(&pknb_blob, io->ac, + lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")), + &pknb, + (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosNewerBlob); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + NTSTATUS status = ndr_map_error2ntstatus(ndr_err); + ldb_asprintf_errstring(io->ac->module->ldb, + "setup_supplemental_field: " + "failed to push package_PrimaryKerberosNeverBlob: %s", + nt_errstr(status)); + return LDB_ERR_OPERATIONS_ERROR; + } + pknb_hexstr = data_blob_hex_string(io->ac, &pknb_blob); + if (!pknb_hexstr) { + ldb_oom(io->ac->module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + pkn->name = "Primary:Kerberos-Newer-Keys"; + pkn->reserved = 1; + pkn->data = pknb_hexstr; + } + /* * setup 'Primary:Kerberos' element */ |