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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 17:20:00 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 17:20:00 +0000 |
commit | 8daa83a594a2e98f39d764422bfbdbc62c9efd44 (patch) | |
tree | 4099e8021376c7d8c05bdf8503093d80e9c7bad0 /libcli/drsuapi | |
parent | Initial commit. (diff) | |
download | samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.tar.xz samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.zip |
Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | libcli/drsuapi/drsuapi.h | 32 | ||||
-rw-r--r-- | libcli/drsuapi/repl_decrypt.c | 391 | ||||
-rw-r--r-- | libcli/drsuapi/tests/test_repl_decrypt.c | 522 | ||||
-rw-r--r-- | libcli/drsuapi/wscript_build | 19 |
4 files changed, 964 insertions, 0 deletions
diff --git a/libcli/drsuapi/drsuapi.h b/libcli/drsuapi/drsuapi.h new file mode 100644 index 0000000..3e1e5ce --- /dev/null +++ b/libcli/drsuapi/drsuapi.h @@ -0,0 +1,32 @@ +/* + Unix SMB/CIFS implementation. + Helper functions for applying replicated objects + + Copyright (C) Stefan Metzmacher <metze@samba.org> 2007 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + +*/ + +WERROR drsuapi_decrypt_attribute(TALLOC_CTX *mem_ctx, + const DATA_BLOB *gensec_skey, + uint32_t rid, + uint32_t dsdb_repl_flags, + struct drsuapi_DsReplicaAttribute *attr); + + +WERROR drsuapi_encrypt_attribute(TALLOC_CTX *mem_ctx, + const DATA_BLOB *gensec_skey, + uint32_t rid, + struct drsuapi_DsReplicaAttribute *attr); diff --git a/libcli/drsuapi/repl_decrypt.c b/libcli/drsuapi/repl_decrypt.c new file mode 100644 index 0000000..d289246 --- /dev/null +++ b/libcli/drsuapi/repl_decrypt.c @@ -0,0 +1,391 @@ +/* + Unix SMB/CIFS implementation. + Helper functions for applying replicated objects + + Copyright (C) Stefan Metzmacher <metze@samba.org> 2007 + Copyright (C) Andrew Bartlett <abartlet@samba.org> 2009 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + +*/ + +#include "includes.h" +#include "../lib/util/dlinklist.h" +#include "librpc/gen_ndr/ndr_misc.h" +#include "librpc/gen_ndr/ndr_drsuapi.h" +#include "librpc/gen_ndr/ndr_drsblobs.h" +#include "zlib.h" +#include "../libcli/drsuapi/drsuapi.h" +#include "libcli/auth/libcli_auth.h" +#include "dsdb/samdb/samdb.h" + +#include "lib/crypto/gnutls_helpers.h" +#include <gnutls/gnutls.h> +#include <gnutls/crypto.h> + +static WERROR drsuapi_decrypt_attribute_value(TALLOC_CTX *mem_ctx, + const DATA_BLOB *gensec_skey, + bool rid_crypt, + uint32_t rid, + const DATA_BLOB *in, + DATA_BLOB *out) +{ + DATA_BLOB confounder; + DATA_BLOB enc_buffer; + + DATA_BLOB dec_buffer; + + uint32_t crc32_given; + uint32_t crc32_calc; + DATA_BLOB checked_buffer; + + DATA_BLOB plain_buffer; + WERROR result; + int rc; + + /* + * users with rid == 0 should not exist + */ + if (rid_crypt && rid == 0) { + return WERR_DS_DRA_INVALID_PARAMETER; + } + + /* + * the first 16 bytes at the beginning are the confounder + * followed by the 4 byte crc32 checksum + */ + if (in->length < 20) { + return WERR_DS_DRA_INVALID_PARAMETER; + } + confounder = data_blob_const(in->data, 16); + enc_buffer = data_blob_const(in->data + 16, in->length - 16); + + /* + * decrypt with the encryption key, being md5 over the session + * key followed by the confounder. The parameter order to + * samba_gnutls_arcfour_confounded_md5() matters for this! + * + * here the gensec session key is used and + * not the dcerpc ncacn_ip_tcp "SystemLibraryDTC" key! + */ + + /* + * reference the encrypted buffer part and + * decrypt it using the created encryption key using arcfour + */ + dec_buffer = data_blob_const(enc_buffer.data, enc_buffer.length); + + rc = samba_gnutls_arcfour_confounded_md5(gensec_skey, + &confounder, + &dec_buffer, + SAMBA_GNUTLS_DECRYPT); + if (rc < 0) { + result = gnutls_error_to_werror(rc, WERR_INTERNAL_ERROR); + goto out; + } + + /* + * the first 4 byte are the crc32 checksum + * of the remaining bytes + */ + crc32_given = IVAL(dec_buffer.data, 0); + crc32_calc = crc32(0, Z_NULL, 0); + crc32_calc = crc32(crc32_calc, + dec_buffer.data + 4 , + dec_buffer.length - 4); + checked_buffer = data_blob_const(dec_buffer.data + 4, dec_buffer.length - 4); + + plain_buffer = data_blob_talloc(mem_ctx, checked_buffer.data, checked_buffer.length); + W_ERROR_HAVE_NO_MEMORY(plain_buffer.data); + + if (crc32_given != crc32_calc) { + result = W_ERROR(HRES_ERROR_V(HRES_SEC_E_DECRYPT_FAILURE)); + goto out; + } + /* + * The following rid_crypt obfuscation isn't session specific + * and not really needed here, because we always know the rid of the + * user account. + * + * some attributes with this 'additional encryption' include + * dBCSPwd, unicodePwd, ntPwdHistory, lmPwdHistory + * + * But for the rest of samba it's easier when we remove this static + * obfuscation here + */ + if (rid_crypt) { + uint32_t i, num_hashes; + + if ((checked_buffer.length % 16) != 0) { + result = WERR_DS_DRA_INVALID_PARAMETER; + goto out; + } + + num_hashes = plain_buffer.length / 16; + for (i = 0; i < num_hashes; i++) { + uint32_t offset = i * 16; + rc = sam_rid_crypt(rid, checked_buffer.data + offset, + plain_buffer.data + offset, + SAMBA_GNUTLS_DECRYPT); + if (rc != 0) { + result = gnutls_error_to_werror(rc, WERR_INTERNAL_ERROR); + goto out; + } + } + } + + *out = plain_buffer; + result = WERR_OK; +out: + return result; +} + +WERROR drsuapi_decrypt_attribute(TALLOC_CTX *mem_ctx, + const DATA_BLOB *gensec_skey, + uint32_t rid, + uint32_t dsdb_repl_flags, + struct drsuapi_DsReplicaAttribute *attr) +{ + WERROR status; + DATA_BLOB *enc_data; + DATA_BLOB plain_data; + bool rid_crypt = false; + + if (attr->value_ctr.num_values == 0) { + return WERR_OK; + } + + switch (attr->attid) { + case DRSUAPI_ATTID_dBCSPwd: + case DRSUAPI_ATTID_unicodePwd: + case DRSUAPI_ATTID_ntPwdHistory: + case DRSUAPI_ATTID_lmPwdHistory: + rid_crypt = true; + break; + case DRSUAPI_ATTID_supplementalCredentials: + case DRSUAPI_ATTID_priorValue: + case DRSUAPI_ATTID_currentValue: + case DRSUAPI_ATTID_trustAuthOutgoing: + case DRSUAPI_ATTID_trustAuthIncoming: + case DRSUAPI_ATTID_initialAuthOutgoing: + case DRSUAPI_ATTID_initialAuthIncoming: + break; + default: + return WERR_OK; + } + + if (dsdb_repl_flags & DSDB_REPL_FLAG_EXPECT_NO_SECRETS) { + return WERR_TOO_MANY_SECRETS; + } + + if (attr->value_ctr.num_values > 1) { + return WERR_DS_DRA_INVALID_PARAMETER; + } + + if (!attr->value_ctr.values[0].blob) { + return WERR_DS_DRA_INVALID_PARAMETER; + } + + enc_data = attr->value_ctr.values[0].blob; + + status = drsuapi_decrypt_attribute_value(mem_ctx, + gensec_skey, + rid_crypt, + rid, + enc_data, + &plain_data); + W_ERROR_NOT_OK_RETURN(status); + + talloc_free(attr->value_ctr.values[0].blob->data); + *attr->value_ctr.values[0].blob = plain_data; + + return WERR_OK; +} + +static WERROR drsuapi_encrypt_attribute_value(TALLOC_CTX *mem_ctx, + const DATA_BLOB *gensec_skey, + bool rid_crypt, + uint32_t rid, + const DATA_BLOB *in, + DATA_BLOB *out) +{ + DATA_BLOB rid_crypt_out = data_blob(NULL, 0); + DATA_BLOB confounder; + + DATA_BLOB enc_buffer; + + DATA_BLOB to_encrypt; + + uint32_t crc32_calc; + WERROR result; + int rc; + + /* + * users with rid == 0 should not exist + */ + if (rid_crypt && rid == 0) { + return WERR_DS_DRA_INVALID_PARAMETER; + } + + /* + * The following rid_crypt obfuscation isn't session specific + * and not really needed here, because we always know the rid of the + * user account. + * + * some attributes with this 'additional encryption' include + * dBCSPwd, unicodePwd, ntPwdHistory, lmPwdHistory + * + * But for the rest of samba it's easier when we remove this static + * obfuscation here + */ + if (rid_crypt) { + uint32_t i, num_hashes; + rid_crypt_out = data_blob_talloc(mem_ctx, in->data, in->length); + W_ERROR_HAVE_NO_MEMORY(rid_crypt_out.data); + + if ((rid_crypt_out.length % 16) != 0) { + return WERR_DS_DRA_INVALID_PARAMETER; + } + + num_hashes = rid_crypt_out.length / 16; + for (i = 0; i < num_hashes; i++) { + uint32_t offset = i * 16; + rc = sam_rid_crypt(rid, in->data + offset, + rid_crypt_out.data + offset, + SAMBA_GNUTLS_ENCRYPT); + if (rc != 0) { + result = gnutls_error_to_werror(rc, WERR_INTERNAL_ERROR); + goto out; + } + } + in = &rid_crypt_out; + } + + /* + * the first 16 bytes at the beginning are the confounder + * followed by the 4 byte crc32 checksum + */ + + enc_buffer = data_blob_talloc(mem_ctx, NULL, in->length+20); + if (!enc_buffer.data) { + talloc_free(rid_crypt_out.data); + return WERR_NOT_ENOUGH_MEMORY; + }; + + confounder = data_blob_const(enc_buffer.data, 16); + generate_random_buffer(confounder.data, confounder.length); + + /* + * the first 4 byte are the crc32 checksum + * of the remaining bytes + */ + crc32_calc = crc32(0, Z_NULL, 0); + crc32_calc = crc32(crc32_calc, in->data, in->length); + SIVAL(enc_buffer.data, 16, crc32_calc); + + /* + * copy the plain buffer part and + * encrypt it using the created encryption key using arcfour + */ + memcpy(enc_buffer.data+20, in->data, in->length); + talloc_free(rid_crypt_out.data); + + to_encrypt = data_blob_const(enc_buffer.data+16, + enc_buffer.length-16); + + /* + * encrypt with the encryption key, being md5 over the session + * key followed by the confounder. The parameter order to + * samba_gnutls_arcfour_confounded_md5() matters for this! + * + * here the gensec session key is used and + * not the dcerpc ncacn_ip_tcp "SystemLibraryDTC" key! + */ + + rc = samba_gnutls_arcfour_confounded_md5(gensec_skey, + &confounder, + &to_encrypt, + SAMBA_GNUTLS_ENCRYPT); + if (rc < 0) { + result = gnutls_error_to_werror(rc, WERR_INTERNAL_ERROR); + goto out; + } + + *out = enc_buffer; + result = WERR_OK; +out: + return result; +} + +/* + encrypt a DRSUAPI attribute ready for sending over the wire + Only some attribute types are encrypted + */ +WERROR drsuapi_encrypt_attribute(TALLOC_CTX *mem_ctx, + const DATA_BLOB *gensec_skey, + uint32_t rid, + struct drsuapi_DsReplicaAttribute *attr) +{ + WERROR status; + DATA_BLOB *plain_data; + DATA_BLOB enc_data; + bool rid_crypt = false; + + if (attr->value_ctr.num_values == 0) { + return WERR_OK; + } + + switch (attr->attid) { + case DRSUAPI_ATTID_dBCSPwd: + case DRSUAPI_ATTID_unicodePwd: + case DRSUAPI_ATTID_ntPwdHistory: + case DRSUAPI_ATTID_lmPwdHistory: + rid_crypt = true; + break; + case DRSUAPI_ATTID_supplementalCredentials: + case DRSUAPI_ATTID_priorValue: + case DRSUAPI_ATTID_currentValue: + case DRSUAPI_ATTID_trustAuthOutgoing: + case DRSUAPI_ATTID_trustAuthIncoming: + case DRSUAPI_ATTID_initialAuthOutgoing: + case DRSUAPI_ATTID_initialAuthIncoming: + break; + default: + return WERR_OK; + } + + if (attr->value_ctr.num_values > 1) { + return WERR_DS_DRA_INVALID_PARAMETER; + } + + if (!attr->value_ctr.values[0].blob) { + return WERR_DS_DRA_INVALID_PARAMETER; + } + + plain_data = attr->value_ctr.values[0].blob; + + status = drsuapi_encrypt_attribute_value(mem_ctx, + gensec_skey, + rid_crypt, + rid, + plain_data, + &enc_data); + W_ERROR_NOT_OK_RETURN(status); + + talloc_free(attr->value_ctr.values[0].blob->data); + *attr->value_ctr.values[0].blob = enc_data; + + return WERR_OK; +} + diff --git a/libcli/drsuapi/tests/test_repl_decrypt.c b/libcli/drsuapi/tests/test_repl_decrypt.c new file mode 100644 index 0000000..996c6e6 --- /dev/null +++ b/libcli/drsuapi/tests/test_repl_decrypt.c @@ -0,0 +1,522 @@ +/* + * Unit tests for source4/rpc_server/dnsserver/dnsutils.c + * + * Copyright (C) Catalyst.NET Ltd 2018 + * Copyright (C) Andrew Bartlett 2019 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +/* + * from cmocka.c: + * These headers or their equivalents should be included prior to + * including + * this header file. + * + * #include <stdarg.h> + * #include <stddef.h> + * #include <setjmp.h> + * + * This allows test applications to use custom definitions of C standard + * library functions and types. + * + */ + +#include <stdarg.h> +#include <stddef.h> +#include <setjmp.h> +#include <cmocka.h> + + +#include "../repl_decrypt.c" + + +/* + * test encryption and decryption including RID obfustincation + */ +static void test_drsuapi_rid_encrypt_decrypt_attribute_value(void **state) +{ + uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4, + 0xe1, 0xf2, 0x03, 0x14, + 0x21, 0x32, 0x43, 0x54, + 0x61, 0x72, 0x83, 0x94 }; + + uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04 }; + const uint32_t rid = 514; + + TALLOC_CTX *mem_ctx = talloc_new(NULL); + + WERROR werr; + + const DATA_BLOB key_blob = data_blob_const(key, sizeof(key)); + const DATA_BLOB plaintext = data_blob_const(test_data, + sizeof(test_data)); + DATA_BLOB encrypted; + DATA_BLOB decrypted = data_blob_null; + + werr = drsuapi_encrypt_attribute_value(mem_ctx, + &key_blob, + true, + rid, + &plaintext, + &encrypted); + + assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK)); + assert_int_not_equal(encrypted.length, plaintext.length); + + werr = drsuapi_decrypt_attribute_value(mem_ctx, + &key_blob, + true, + rid, + &encrypted, + &decrypted); + + assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK)); + + assert_int_equal(decrypted.length, plaintext.length); + + assert_memory_equal(decrypted.data, plaintext.data, plaintext.length); + TALLOC_FREE(mem_ctx); +} + +/* + * test encryption and decryption failing RID obfustincation (data length) + */ +static void test_drsuapi_bad_len_rid_encrypt_decrypt_attribute_value(void **state) +{ + uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4, + 0xe1, 0xf2, 0x03, 0x14, + 0x21, 0x32, 0x43, 0x54, + 0x61, 0x72, 0x83, 0x94 }; + + uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, 0x05 }; + const uint32_t rid = 514; + + TALLOC_CTX *mem_ctx = talloc_new(NULL); + + WERROR werr; + + const DATA_BLOB key_blob = data_blob_const(key, sizeof(key)); + const DATA_BLOB plaintext = data_blob_const(test_data, + sizeof(test_data)); + DATA_BLOB encrypted; + + werr = drsuapi_encrypt_attribute_value(mem_ctx, + &key_blob, + true, + rid, + &plaintext, + &encrypted); + + assert_int_equal(W_ERROR_V(werr), + W_ERROR_V(WERR_DS_DRA_INVALID_PARAMETER)); + TALLOC_FREE(mem_ctx); +} + +/* + * test encryption and decryption failing RID obfustincation (zero rid) + */ +static void test_drsuapi_zero_rid_encrypt_decrypt_attribute_value(void **state) +{ + uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4, + 0xe1, 0xf2, 0x03, 0x14, + 0x21, 0x32, 0x43, 0x54, + 0x61, 0x72, 0x83, 0x94 }; + + uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04 }; + const uint32_t rid = 0; + + TALLOC_CTX *mem_ctx = talloc_new(NULL); + + WERROR werr; + + const DATA_BLOB key_blob = data_blob_const(key, sizeof(key)); + const DATA_BLOB plaintext = data_blob_const(test_data, + sizeof(test_data)); + DATA_BLOB encrypted; + + werr = drsuapi_encrypt_attribute_value(mem_ctx, + &key_blob, + true, + rid, + &plaintext, + &encrypted); + + assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_DS_DRA_INVALID_PARAMETER)); + TALLOC_FREE(mem_ctx); +} + +/* + * test encryption and decryption without RID obfustication + */ +static void test_drsuapi_encrypt_decrypt_attribute_value(void **state) +{ + uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4, + 0xe1, 0xf2, 0x03, 0x14, + 0x21, 0x32, 0x43, 0x54, + 0x61, 0x72, 0x83, 0x94 }; + + /* Ensures we can cope with odd lengths */ + uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, 0x05 }; + + + TALLOC_CTX *mem_ctx = talloc_new(NULL); + + WERROR werr; + + const DATA_BLOB key_blob = data_blob_const(key, sizeof(key)); + const DATA_BLOB plaintext = data_blob_const(test_data, + sizeof(test_data)); + DATA_BLOB encrypted; + DATA_BLOB decrypted = data_blob_null; + + werr = drsuapi_encrypt_attribute_value(mem_ctx, + &key_blob, + false, + 0, + &plaintext, + &encrypted); + + assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK)); + assert_int_not_equal(encrypted.length, plaintext.length); + + werr = drsuapi_decrypt_attribute_value(mem_ctx, + &key_blob, + false, + 0, + &encrypted, + &decrypted); + + assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK)); + + assert_int_equal(decrypted.length, plaintext.length); + + assert_memory_equal(decrypted.data, plaintext.data, plaintext.length); + TALLOC_FREE(mem_ctx); +} + +/* + * test decryption of fixed buffer + */ +static void test_drsuapi_decrypt_attribute_value(void **state) +{ + uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4, + 0xe1, 0xf2, 0x03, 0x14, + 0x21, 0x32, 0x43, 0x54, + 0x61, 0x72, 0x83, 0x94 }; + + /* Ensures we can cope with odd lengths */ + uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, 0x05 }; + + uint8_t encrypted_test_data[] = { 0xFF, 0x5C, 0x58, 0x3F, + 0xD4, 0x41, 0xCA, 0xB0, + 0x14, 0xFE, 0xFB, 0xA6, + 0xB0, 0x32, 0x45, 0x45, + 0x9D, 0x76, 0x75, 0xD2, + 0xFB, 0x34, 0x77, 0xBD, + 0x8C, 0x1E, 0x09, 0x1A, + 0xF1, 0xAB, 0xD3, 0x0E, + 0xBE, 0x80, 0xAB, 0x19, 0xFC }; + + TALLOC_CTX *mem_ctx = talloc_new(NULL); + + WERROR werr; + + const DATA_BLOB key_blob = data_blob_const(key, sizeof(key)); + const DATA_BLOB plaintext = data_blob_const(test_data, + sizeof(test_data)); + const DATA_BLOB encrypted + = data_blob_const(encrypted_test_data, + sizeof(encrypted_test_data)); + DATA_BLOB decrypted = data_blob_null; + + werr = drsuapi_decrypt_attribute_value(mem_ctx, + &key_blob, + false, + 0, + &encrypted, + &decrypted); + + assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK)); + + assert_int_equal(decrypted.length, plaintext.length); + + assert_memory_equal(decrypted.data, plaintext.data, plaintext.length); + TALLOC_FREE(mem_ctx); +} + +/* + * test decryption of fixed buffer (rid decrypt) + */ +static void test_drsuapi_rid_decrypt_attribute_value(void **state) +{ + uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4, + 0xe1, 0xf2, 0x03, 0x14, + 0x21, 0x32, 0x43, 0x54, + 0x61, 0x72, 0x83, 0x94 }; + + /* Ensures we can cope with odd lengths */ + uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04 }; + + uint8_t encrypted_test_data[] = {0x95, 0xB2, 0xE8, 0x02, + 0x05, 0x5E, 0xFD, 0x3D, + 0x7D, 0x17, 0xB9, 0x76, + 0x4D, 0x91, 0xED, 0x59, + 0x98, 0x79, 0x7A, 0xFC, + 0x38, 0x73, 0x28, 0x55, + 0x62, 0x27, 0x99, 0x3B, + 0xD0, 0x18, 0xBD, 0x23, + 0x5D, 0x98, 0xFE, 0xA8}; + + const uint32_t rid = 514; + + TALLOC_CTX *mem_ctx = talloc_new(NULL); + + WERROR werr; + + const DATA_BLOB key_blob = data_blob_const(key, sizeof(key)); + const DATA_BLOB plaintext = data_blob_const(test_data, + sizeof(test_data)); + const DATA_BLOB encrypted + = data_blob_const(encrypted_test_data, + sizeof(encrypted_test_data)); + DATA_BLOB decrypted = data_blob_null; + + werr = drsuapi_decrypt_attribute_value(mem_ctx, + &key_blob, + true, + rid, + &encrypted, + &decrypted); + + assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK)); + + assert_int_equal(decrypted.length, plaintext.length); + + assert_memory_equal(decrypted.data, plaintext.data, plaintext.length); + + TALLOC_FREE(mem_ctx); +} + +/* + * test decryption of fixed buffer (rid decrypt) + */ +static void test_drsuapi_bad_len_rid_decrypt_attribute_value(void **state) +{ + uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4, + 0xe1, 0xf2, 0x03, 0x14, + 0x21, 0x32, 0x43, 0x54, + 0x61, 0x72, 0x83, 0x94 }; + + uint8_t encrypted_test_data[] = { 0xFF, 0x5C, 0x58, 0x3F, + 0xD4, 0x41, 0xCA, 0xB0, + 0x14, 0xFE, 0xFB, 0xA6, + 0xB0, 0x32, 0x45, 0x45, + 0x9D, 0x76, 0x75, 0xD2, + 0xFB, 0x34, 0x77, 0xBD, + 0x8C, 0x1E, 0x09, 0x1A, + 0xF1, 0xAB, 0xD3, 0x0E, + 0xBE, 0x80, 0xAB, 0x19, 0xFC }; + + const uint32_t rid = 514; + + TALLOC_CTX *mem_ctx = talloc_new(NULL); + + WERROR werr; + + const DATA_BLOB key_blob = data_blob_const(key, sizeof(key)); + const DATA_BLOB encrypted + = data_blob_const(encrypted_test_data, + sizeof(encrypted_test_data)); + DATA_BLOB decrypted; + + werr = drsuapi_decrypt_attribute_value(mem_ctx, + &key_blob, + true, + rid, + &encrypted, + &decrypted); + + assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_DS_DRA_INVALID_PARAMETER)); + + TALLOC_FREE(mem_ctx); +} + +/* + * test decryption of fixed buffer (rid decrypt) + */ +static void test_drsuapi_zero_rid_decrypt_attribute_value(void **state) +{ + uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4, + 0xe1, 0xf2, 0x03, 0x14, + 0x21, 0x32, 0x43, 0x54, + 0x61, 0x72, 0x83, 0x94 }; + + uint8_t encrypted_test_data[] = { 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, 0x05 }; + const uint32_t rid = 0; + + TALLOC_CTX *mem_ctx = talloc_new(NULL); + + WERROR werr; + + const DATA_BLOB key_blob = data_blob_const(key, sizeof(key)); + const DATA_BLOB encrypted + = data_blob_const(encrypted_test_data, + sizeof(encrypted_test_data)); + DATA_BLOB decrypted; + + werr = drsuapi_decrypt_attribute_value(mem_ctx, + &key_blob, + true, + rid, + &encrypted, + &decrypted); + + assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_DS_DRA_INVALID_PARAMETER)); + + TALLOC_FREE(mem_ctx); +} + +/* + * test decryption of fixed buffer (bad crc) + */ +static void test_drsuapi_bad_crc_decrypt_attribute_value(void **state) +{ + uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4, + 0xe1, 0xf2, 0x03, 0x14, + 0x21, 0x32, 0x43, 0x54, + 0x61, 0x72, 0x83, 0x94 }; + + uint8_t encrypted_test_data[] = { 0xFF, 0x5C, 0x58, 0x3F, + 0xD4, 0x41, 0xCA, 0xB0, + 0x14, 0xFE, 0xFB, 0xA6, + 0xB0, 0x32, 0x45, 0x45, + 0x9D, 0x76, 0x75, 0xD2, + 0xFB, 0x34, 0x77, 0xBD, + 0x8C, 0x1E, 0x09, 0x1A, + 0xF1, 0xAB, 0xD3, 0x0E, + 0xBE, 0x80, 0xAB, 0x19, 0xFF }; + + const uint32_t rid = 514; + + TALLOC_CTX *mem_ctx = talloc_new(NULL); + + WERROR werr; + + const DATA_BLOB key_blob = data_blob_const(key, sizeof(key)); + const DATA_BLOB encrypted + = data_blob_const(encrypted_test_data, + sizeof(encrypted_test_data)); + DATA_BLOB decrypted; + + werr = drsuapi_decrypt_attribute_value(mem_ctx, + &key_blob, + true, + rid, + &encrypted, + &decrypted); + + assert_int_equal(W_ERROR_V(werr), HRES_ERROR_V(HRES_SEC_E_DECRYPT_FAILURE)); + + TALLOC_FREE(mem_ctx); +} + +/* + * test decryption of short buffer + */ +static void test_drsuapi_short_decrypt_attribute_value(void **state) +{ + uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4, + 0xe1, 0xf2, 0x03, 0x14, + 0x21, 0x32, 0x43, 0x54, + 0x61, 0x72, 0x83, 0x94 }; + + uint8_t encrypted_test_data[] = { 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, + 0x01, 0x02, 0x03, 0x04, 0x05 }; + const uint32_t rid = 514; + + TALLOC_CTX *mem_ctx = talloc_new(NULL); + + WERROR werr; + + const DATA_BLOB key_blob = data_blob_const(key, sizeof(key)); + const DATA_BLOB encrypted + = data_blob_const(encrypted_test_data, + sizeof(encrypted_test_data)); + DATA_BLOB decrypted; + + werr = drsuapi_decrypt_attribute_value(mem_ctx, + &key_blob, + true, + rid, + &encrypted, + &decrypted); + + assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_DS_DRA_INVALID_PARAMETER)); + + TALLOC_FREE(mem_ctx); +} + +int main(int argc, const char **argv) +{ + const struct CMUnitTest tests[] = { + cmocka_unit_test( + test_drsuapi_rid_encrypt_decrypt_attribute_value), + cmocka_unit_test( + test_drsuapi_bad_len_rid_encrypt_decrypt_attribute_value), + cmocka_unit_test( + test_drsuapi_zero_rid_encrypt_decrypt_attribute_value), + cmocka_unit_test( + test_drsuapi_encrypt_decrypt_attribute_value), + cmocka_unit_test( + test_drsuapi_decrypt_attribute_value), + cmocka_unit_test( + test_drsuapi_bad_crc_decrypt_attribute_value), + cmocka_unit_test( + test_drsuapi_rid_decrypt_attribute_value), + cmocka_unit_test( + test_drsuapi_zero_rid_decrypt_attribute_value), + cmocka_unit_test( + test_drsuapi_bad_len_rid_decrypt_attribute_value), + cmocka_unit_test( + test_drsuapi_short_decrypt_attribute_value), + }; + + cmocka_set_message_output(CM_OUTPUT_SUBUNIT); + return cmocka_run_group_tests(tests, NULL, NULL); +} diff --git a/libcli/drsuapi/wscript_build b/libcli/drsuapi/wscript_build new file mode 100644 index 0000000..1aee095 --- /dev/null +++ b/libcli/drsuapi/wscript_build @@ -0,0 +1,19 @@ +#!/usr/bin/env python + + +bld.SAMBA_SUBSYSTEM('LIBCLI_DRSUAPI', + source='repl_decrypt.c', + public_deps='LIBCLI_AUTH samdb z' + ) + +bld.SAMBA_BINARY( + 'test_repl_decrypt', + source='tests/test_repl_decrypt.c', + deps=''' + LIBCLI_DRSUAPI + cmocka + talloc + ''', + for_selftest=True, + enabled=bld.AD_DC_BUILD_IS_ENABLED() +) |