diff options
Diffstat (limited to 'libcli/drsuapi')
| -rw-r--r-- | libcli/drsuapi/drsuapi.h | 5 | ||||
| -rw-r--r-- | libcli/drsuapi/repl_decrypt.c | 84 |
2 files changed, 78 insertions, 11 deletions
diff --git a/libcli/drsuapi/drsuapi.h b/libcli/drsuapi/drsuapi.h index b95350779a..a4fb15fa49 100644 --- a/libcli/drsuapi/drsuapi.h +++ b/libcli/drsuapi/drsuapi.h @@ -31,3 +31,8 @@ WERROR drsuapi_decrypt_attribute(TALLOC_CTX *mem_ctx, uint32_t rid, 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 index 33dfbe59df..924e79992f 100644 --- a/libcli/drsuapi/repl_decrypt.c +++ b/libcli/drsuapi/repl_decrypt.c @@ -94,14 +94,14 @@ WERROR drsuapi_decrypt_attribute_value(TALLOC_CTX *mem_ctx, */ crc32_given = IVAL(dec_buffer.data, 0); crc32_calc = crc32_calc_buffer(dec_buffer.data + 4 , dec_buffer.length - 4); - if (crc32_given != crc32_calc) { - return WERR_SEC_E_DECRYPT_FAILURE; - } 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) { + return WERR_SEC_E_DECRYPT_FAILURE; + } /* * The following rid_crypt obfuscation isn't session specific * and not really needed here, because we allways know the rid of the @@ -188,12 +188,12 @@ WERROR drsuapi_decrypt_attribute(TALLOC_CTX *mem_ctx, return WERR_OK; } -WERROR drsuapi_encrypt_attribute_value(TALLOC_CTX *mem_ctx, - const DATA_BLOB *gensec_skey, - bool rid_crypt, - uint32_t rid, - DATA_BLOB *in, - DATA_BLOB *out) +static WERROR drsuapi_encrypt_attribute_value(TALLOC_CTX *mem_ctx, + const DATA_BLOB *gensec_skey, + bool rid_crypt, + uint32_t rid, + DATA_BLOB *in, + DATA_BLOB *out) { DATA_BLOB rid_crypt_out = data_blob(NULL, 0); DATA_BLOB confounder; @@ -273,7 +273,7 @@ WERROR drsuapi_encrypt_attribute_value(TALLOC_CTX *mem_ctx, * of the remaining bytes */ crc32_calc = crc32_calc_buffer(in->data, in->length); - SIVAL(enc_buffer.data, 4, crc32_calc); + SIVAL(enc_buffer.data, 16, crc32_calc); /* * copy the plain buffer part and @@ -282,9 +282,71 @@ WERROR drsuapi_encrypt_attribute_value(TALLOC_CTX *mem_ctx, memcpy(enc_buffer.data+20, in->data, in->length); talloc_free(rid_crypt_out.data); - arcfour_crypt_blob(enc_buffer.data+20, enc_buffer.length-20, &enc_key); + arcfour_crypt_blob(enc_buffer.data+16, enc_buffer.length-16, &enc_key); *out = enc_buffer; + + return WERR_OK; +} + +/* + 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_ATTRIBUTE_dBCSPwd: + case DRSUAPI_ATTRIBUTE_unicodePwd: + case DRSUAPI_ATTRIBUTE_ntPwdHistory: + case DRSUAPI_ATTRIBUTE_lmPwdHistory: + rid_crypt = true; + break; + case DRSUAPI_ATTRIBUTE_supplementalCredentials: + case DRSUAPI_ATTRIBUTE_priorValue: + case DRSUAPI_ATTRIBUTE_currentValue: + case DRSUAPI_ATTRIBUTE_trustAuthOutgoing: + case DRSUAPI_ATTRIBUTE_trustAuthIncoming: + case DRSUAPI_ATTRIBUTE_initialAuthOutgoing: + case DRSUAPI_ATTRIBUTE_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; } |