19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <parser_dcf.h> 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <svc_drm.h> 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectstatic int32_t drm_parseUintVar(uint8_t * buffer, uint8_t * len) 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int32_t i; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int32_t byteLen; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int32_t sum; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (NULL == buffer) 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return DRM_UINT_VAR_ERR; 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byteLen = 0; 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while ((buffer[byteLen] & UINT_VAR_FLAG) > 0 && byteLen < MAX_UINT_VAR_BYTE) /* UINT_VAR_FLAG == 0x80 */ 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project byteLen++; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (byteLen >= MAX_UINT_VAR_BYTE) /* MAX_UINT_VAR_BYTE == 5 */ 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return DRM_UINT_VAR_ERR; /* The var int is too large, and that is impossible */ 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project *len = (uint8_t)(byteLen + 1); 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sum = buffer[byteLen]; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (i = byteLen - 1; i >= 0; i--) 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sum += ((buffer[i] & UINT_VAR_DATA) << 7 * (byteLen - i)); /* UINT_VAR_DATA == 0x7F */ 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return sum; 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* See parser_dcf.h */ 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectint32_t drm_dcfParser(uint8_t *buffer, int32_t bufferLen, T_DRM_DCF_Info *pDcfInfo, 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project uint8_t **ppEncryptedData) 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project uint8_t *tmpBuf; 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project uint8_t *pStart, *pEnd; 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project uint8_t *pHeader, *pData; 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project uint8_t varLen; 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (NULL == buffer || bufferLen <= 0 || NULL == pDcfInfo) 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return FALSE; 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project tmpBuf = buffer; 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 1. Parse the version, content-type and content-url */ 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pDcfInfo->Version = *(tmpBuf++); 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (0x01 != pDcfInfo->Version) /* Because it is OMA DRM v1.0, the vension must be 1 */ 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return FALSE; 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pDcfInfo->ContentTypeLen = *(tmpBuf++); 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pDcfInfo->ContentURILen = *(tmpBuf++); 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project strncpy((char *)pDcfInfo->ContentType, (char *)tmpBuf, pDcfInfo->ContentTypeLen); 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project tmpBuf += pDcfInfo->ContentTypeLen; 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project strncpy((char *)pDcfInfo->ContentURI, (char *)tmpBuf, pDcfInfo->ContentURILen); 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project tmpBuf += pDcfInfo->ContentURILen; 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 2. Get the headers length and data length */ 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pDcfInfo->HeadersLen = drm_parseUintVar(tmpBuf, &varLen); 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (DRM_UINT_VAR_ERR == pDcfInfo->HeadersLen) 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return FALSE; 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project tmpBuf += varLen; 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pDcfInfo->DecryptedDataLen = DRM_UNKNOWN_DATA_LEN; 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pDcfInfo->EncryptedDataLen = drm_parseUintVar(tmpBuf, &varLen); 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (DRM_UINT_VAR_ERR == pDcfInfo->EncryptedDataLen) 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return FALSE; 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project tmpBuf += varLen; 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pHeader = tmpBuf; 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project tmpBuf += pDcfInfo->HeadersLen; 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pData = tmpBuf; 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 3. Parse the headers */ 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pStart = pHeader; 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (pStart < pData) { 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pEnd = pStart; 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while ('\r' != *pEnd && pEnd < pData) 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pEnd++; 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (0 == strncmp((char *)pStart, HEADER_ENCRYPTION_METHOD, HEADER_ENCRYPTION_METHOD_LEN)) 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project strncpy((char *)pDcfInfo->Encryption_Method, 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (char *)(pStart + HEADER_ENCRYPTION_METHOD_LEN), 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pEnd - pStart - HEADER_ENCRYPTION_METHOD_LEN); 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project else if (0 == strncmp((char *)pStart, HEADER_RIGHTS_ISSUER, HEADER_RIGHTS_ISSUER_LEN)) 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project strncpy((char *)pDcfInfo->Rights_Issuer, 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (char *)(pStart + HEADER_RIGHTS_ISSUER_LEN), 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pEnd - pStart - HEADER_RIGHTS_ISSUER_LEN); 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project else if (0 == strncmp((char *)pStart, HEADER_CONTENT_NAME, HEADER_CONTENT_NAME_LEN)) 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project strncpy((char *)pDcfInfo->Content_Name, 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (char *)(pStart + HEADER_CONTENT_NAME_LEN), 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pEnd - pStart - HEADER_CONTENT_NAME_LEN); 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project else if (0 == strncmp((char *)pStart, HEADER_CONTENT_DESCRIPTION, HEADER_CONTENT_DESCRIPTION_LEN)) 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project strncpy((char *)pDcfInfo->ContentDescription, 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (char *)(pStart + HEADER_CONTENT_DESCRIPTION_LEN), 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pEnd - pStart - HEADER_CONTENT_DESCRIPTION_LEN); 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project else if (0 == strncmp((char *)pStart, HEADER_CONTENT_VENDOR, HEADER_CONTENT_VENDOR_LEN)) 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project strncpy((char *)pDcfInfo->ContentVendor, 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (char *)(pStart + HEADER_CONTENT_VENDOR_LEN), 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pEnd - pStart - HEADER_CONTENT_VENDOR_LEN); 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project else if (0 == strncmp((char *)pStart, HEADER_ICON_URI, HEADER_ICON_URI_LEN)) 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project strncpy((char *)pDcfInfo->Icon_URI, 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (char *)(pStart + HEADER_ICON_URI_LEN), 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pEnd - pStart - HEADER_ICON_URI_LEN); 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ('\n' == *(pEnd + 1)) 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pStart = pEnd + 2; /* Two bytes: a '\r' and a '\n' */ 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project else 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pStart = pEnd + 1; 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4. Give out the location of encrypted data */ 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (NULL != ppEncryptedData) 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project *ppEncryptedData = pData; 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return TRUE; 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 126