Add ability for some manifest attributes to reference resources.

This loosens our restriction on many manifest attributes requiring
literal string values, to allow various ones to use values from
resources.  This is only allowed if the resource value does not change
from configuration changes, and the restriction is still in place
for attributes that are core to security (requesting permissions) or
market operation (used libraries and features etc).

Change-Id: I4da02f6a5196cb6a7dbcff9ac25403904c42c2c8

1 files changed, 167 insertions, 100 deletions

diff --git a/tools/aapt/Resource.cpp b/tools/aapt/Resource.cpp
index b7580b33c723..c0ebb5963328 100644
--- a/tools/aapt/Resource.cpp
+++ b/tools/aapt/Resource.cpp
@@ -379,14 +379,64 @@ enum {
     ATTR_LEADING_SPACES = -3,
     ATTR_TRAILING_SPACES = -4
 };
-static int validateAttr(const String8& path, const ResXMLParser& parser,
+static int validateAttr(const String8& path, const ResTable& table,
+        const ResXMLParser& parser,
         const char* ns, const char* attr, const char* validChars, bool required)
 {
     size_t len;
 
     ssize_t index = parser.indexOfAttribute(ns, attr);
     const uint16_t* str;
-    if (index >= 0 && (str=parser.getAttributeStringValue(index, &len)) != NULL) {
+    Res_value value;
+    if (index >= 0 && parser.getAttributeValue(index, &value) >= 0) {
+        const ResStringPool* pool = &parser.getStrings();
+        if (value.dataType == Res_value::TYPE_REFERENCE) {
+            uint32_t specFlags = 0;
+            int strIdx;
+            if ((strIdx=table.resolveReference(&value, 0x10000000, NULL, &specFlags)) < 0) {
+                fprintf(stderr, "%s:%d: Tag <%s> attribute %s references unknown resid 0x%08x.\n",
+                        path.string(), parser.getLineNumber(),
+                        String8(parser.getElementName(&len)).string(), attr,
+                        value.data);
+                return ATTR_NOT_FOUND;
+            }
+            
+            pool = table.getTableStringBlock(strIdx);
+            #if 0
+            if (pool != NULL) {
+                str = pool->stringAt(value.data, &len);
+            }
+            printf("***** RES ATTR: %s specFlags=0x%x strIdx=%d: %s\n", attr,
+                    specFlags, strIdx, str != NULL ? String8(str).string() : "???");
+            #endif
+            if ((specFlags&~ResTable_typeSpec::SPEC_PUBLIC) != 0 && false) {
+                fprintf(stderr, "%s:%d: Tag <%s> attribute %s varies by configurations 0x%x.\n",
+                        path.string(), parser.getLineNumber(),
+                        String8(parser.getElementName(&len)).string(), attr,
+                        specFlags);
+                return ATTR_NOT_FOUND;
+            }
+        }
+        if (value.dataType == Res_value::TYPE_STRING) {
+            if (pool == NULL) {
+                fprintf(stderr, "%s:%d: Tag <%s> attribute %s has no string block.\n",
+                        path.string(), parser.getLineNumber(),
+                        String8(parser.getElementName(&len)).string(), attr);
+                return ATTR_NOT_FOUND;
+            }
+            if ((str=pool->stringAt(value.data, &len)) == NULL) {
+                fprintf(stderr, "%s:%d: Tag <%s> attribute %s has corrupt string value.\n",
+                        path.string(), parser.getLineNumber(),
+                        String8(parser.getElementName(&len)).string(), attr);
+                return ATTR_NOT_FOUND;
+            }
+        } else {
+            fprintf(stderr, "%s:%d: Tag <%s> attribute %s has invalid type %d.\n",
+                    path.string(), parser.getLineNumber(),
+                    String8(parser.getElementName(&len)).string(), attr,
+                    value.dataType);
+            return ATTR_NOT_FOUND;
+        }
         if (validChars) {
             for (size_t i=0; i<len; i++) {
                 uint16_t c = str[i];
@@ -959,21 +1009,102 @@ status_t buildResources(Bundle* bundle, const sp<AaptAssets>& assets)
         err = NO_ERROR;
     }
 
+    if (table.validateLocalizations()) {
+        hasErrors = true;
+    }
+    
+    if (hasErrors) {
+        return UNKNOWN_ERROR;
+    }
+
     const sp<AaptFile> manifestFile(androidManifestFile->getFiles().valueAt(0));
     String8 manifestPath(manifestFile->getPrintableSource());
 
+    // Generate final compiled manifest file.
+    manifestFile->clearData();
+    sp<XMLNode> manifestTree = XMLNode::parse(manifestFile);
+    if (manifestTree == NULL) {
+        return UNKNOWN_ERROR;
+    }
+    err = massageManifest(bundle, manifestTree);
+    if (err < NO_ERROR) {
+        return err;
+    }
+    err = compileXmlFile(assets, manifestTree, manifestFile, &table);
+    if (err < NO_ERROR) {
+        return err;
+    }
+
+    //block.restart();
+    //printXMLBlock(&block);
+
+    // --------------------------------------------------------------
+    // Generate the final resource table.
+    // Re-flatten because we may have added new resource IDs
+    // --------------------------------------------------------------
+
+    ResTable finalResTable;
+    sp<AaptFile> resFile;
+    
+    if (table.hasResources()) {
+        sp<AaptSymbols> symbols = assets->getSymbolsFor(String8("R"));
+        err = table.addSymbols(symbols);
+        if (err < NO_ERROR) {
+            return err;
+        }
+
+        resFile = getResourceFile(assets);
+        if (resFile == NULL) {
+            fprintf(stderr, "Error: unable to generate entry for resource data\n");
+            return UNKNOWN_ERROR;
+        }
+
+        err = table.flatten(bundle, resFile);
+        if (err < NO_ERROR) {
+            return err;
+        }
+
+        if (bundle->getPublicOutputFile()) {
+            FILE* fp = fopen(bundle->getPublicOutputFile(), "w+");
+            if (fp == NULL) {
+                fprintf(stderr, "ERROR: Unable to open public definitions output file %s: %s\n",
+                        (const char*)bundle->getPublicOutputFile(), strerror(errno));
+                return UNKNOWN_ERROR;
+            }
+            if (bundle->getVerbose()) {
+                printf("  Writing public definitions to %s.\n", bundle->getPublicOutputFile());
+            }
+            table.writePublicDefinitions(String16(assets->getPackage()), fp);
+            fclose(fp);
+        }
+        
+        // Read resources back in,
+        finalResTable.add(resFile->getData(), resFile->getSize(), NULL);
+        
+#if 0
+        NOISY(
+              printf("Generated resources:\n");
+              finalResTable.print();
+        )
+#endif
+    }
+    
     // Perform a basic validation of the manifest file.  This time we
     // parse it with the comments intact, so that we can use them to
     // generate java docs...  so we are not going to write this one
     // back out to the final manifest data.
-    err = compileXmlFile(assets, manifestFile, &table,
+    sp<AaptFile> outManifestFile = new AaptFile(manifestFile->getSourceFile(),
+            manifestFile->getGroupEntry(),
+            manifestFile->getResourceType());
+    err = compileXmlFile(assets, manifestFile,
+            outManifestFile, &table,
             XML_COMPILE_ASSIGN_ATTRIBUTE_IDS
             | XML_COMPILE_STRIP_WHITESPACE | XML_COMPILE_STRIP_RAW_VALUES);
     if (err < NO_ERROR) {
         return err;
     }
     ResXMLTree block;
-    block.setTo(manifestFile->getData(), manifestFile->getSize(), true);
+    block.setTo(outManifestFile->getData(), outManifestFile->getSize(), true);
     String16 manifest16("manifest");
     String16 permission16("permission");
     String16 permission_group16("permission-group");
@@ -1012,16 +1143,20 @@ status_t buildResources(Bundle* bundle, const sp<AaptAssets>& assets)
                 continue;
             }
             if (strcmp16(block.getElementName(&len), manifest16.string()) == 0) {
-                if (validateAttr(manifestPath, block, NULL, "package",
+                if (validateAttr(manifestPath, finalResTable, block, NULL, "package",
                                  packageIdentChars, true) != ATTR_OKAY) {
                     hasErrors = true;
                 }
+                if (validateAttr(manifestPath, finalResTable, block, RESOURCES_ANDROID_NAMESPACE,
+                                 "sharedUserId", packageIdentChars, false) != ATTR_OKAY) {
+                    hasErrors = true;
+                }
             } else if (strcmp16(block.getElementName(&len), permission16.string()) == 0
                     || strcmp16(block.getElementName(&len), permission_group16.string()) == 0) {
                 const bool isGroup = strcmp16(block.getElementName(&len),
                         permission_group16.string()) == 0;
-                if (validateAttr(manifestPath, block, RESOURCES_ANDROID_NAMESPACE, "name",
-                                 isGroup ? packageIdentCharsWithTheStupid
+                if (validateAttr(manifestPath, finalResTable, block, RESOURCES_ANDROID_NAMESPACE,
+                                 "name", isGroup ? packageIdentCharsWithTheStupid
                                  : packageIdentChars, true) != ATTR_OKAY) {
                     hasErrors = true;
                 }
@@ -1099,56 +1234,56 @@ status_t buildResources(Bundle* bundle, const sp<AaptAssets>& assets)
                 }
                 syms->makeSymbolPublic(String8(e), srcPos);
             } else if (strcmp16(block.getElementName(&len), uses_permission16.string()) == 0) {
-                if (validateAttr(manifestPath, block, RESOURCES_ANDROID_NAMESPACE, "name",
-                                 packageIdentChars, true) != ATTR_OKAY) {
+                if (validateAttr(manifestPath, finalResTable, block, RESOURCES_ANDROID_NAMESPACE,
+                                 "name", packageIdentChars, true) != ATTR_OKAY) {
                     hasErrors = true;
                 }
             } else if (strcmp16(block.getElementName(&len), instrumentation16.string()) == 0) {
-                if (validateAttr(manifestPath, block, RESOURCES_ANDROID_NAMESPACE, "name",
-                                 classIdentChars, true) != ATTR_OKAY) {
+                if (validateAttr(manifestPath, finalResTable, block, RESOURCES_ANDROID_NAMESPACE,
+                                 "name", classIdentChars, true) != ATTR_OKAY) {
                     hasErrors = true;
                 }
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "targetPackage",
                                  packageIdentChars, true) != ATTR_OKAY) {
                     hasErrors = true;
                 }
             } else if (strcmp16(block.getElementName(&len), application16.string()) == 0) {
-                if (validateAttr(manifestPath, block, RESOURCES_ANDROID_NAMESPACE, "name",
-                                 classIdentChars, false) != ATTR_OKAY) {
+                if (validateAttr(manifestPath, finalResTable, block, RESOURCES_ANDROID_NAMESPACE,
+                                 "name", classIdentChars, false) != ATTR_OKAY) {
                     hasErrors = true;
                 }
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "permission",
                                  packageIdentChars, false) != ATTR_OKAY) {
                     hasErrors = true;
                 }
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "process",
                                  processIdentChars, false) != ATTR_OKAY) {
                     hasErrors = true;
                 }
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "taskAffinity",
                                  processIdentChars, false) != ATTR_OKAY) {
                     hasErrors = true;
                 }
             } else if (strcmp16(block.getElementName(&len), provider16.string()) == 0) {
-                if (validateAttr(manifestPath, block, RESOURCES_ANDROID_NAMESPACE, "name",
-                                 classIdentChars, true) != ATTR_OKAY) {
+                if (validateAttr(manifestPath, finalResTable, block, RESOURCES_ANDROID_NAMESPACE,
+                                 "name", classIdentChars, true) != ATTR_OKAY) {
                     hasErrors = true;
                 }
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "authorities",
                                  authoritiesIdentChars, true) != ATTR_OKAY) {
                     hasErrors = true;
                 }
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "permission",
                                  packageIdentChars, false) != ATTR_OKAY) {
                     hasErrors = true;
                 }
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "process",
                                  processIdentChars, false) != ATTR_OKAY) {
                     hasErrors = true;
@@ -1156,39 +1291,39 @@ status_t buildResources(Bundle* bundle, const sp<AaptAssets>& assets)
             } else if (strcmp16(block.getElementName(&len), service16.string()) == 0
                        || strcmp16(block.getElementName(&len), receiver16.string()) == 0
                        || strcmp16(block.getElementName(&len), activity16.string()) == 0) {
-                if (validateAttr(manifestPath, block, RESOURCES_ANDROID_NAMESPACE, "name",
-                                 classIdentChars, true) != ATTR_OKAY) {
+                if (validateAttr(manifestPath, finalResTable, block, RESOURCES_ANDROID_NAMESPACE,
+                                 "name", classIdentChars, true) != ATTR_OKAY) {
                     hasErrors = true;
                 }
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "permission",
                                  packageIdentChars, false) != ATTR_OKAY) {
                     hasErrors = true;
                 }
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "process",
                                  processIdentChars, false) != ATTR_OKAY) {
                     hasErrors = true;
                 }
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "taskAffinity",
                                  processIdentChars, false) != ATTR_OKAY) {
                     hasErrors = true;
                 }
             } else if (strcmp16(block.getElementName(&len), action16.string()) == 0
                        || strcmp16(block.getElementName(&len), category16.string()) == 0) {
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "name",
                                  packageIdentChars, true) != ATTR_OKAY) {
                     hasErrors = true;
                 }
             } else if (strcmp16(block.getElementName(&len), data16.string()) == 0) {
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "mimeType",
                                  typeIdentChars, true) != ATTR_OKAY) {
                     hasErrors = true;
                 }
-                if (validateAttr(manifestPath, block,
+                if (validateAttr(manifestPath, finalResTable, block,
                                  RESOURCES_ANDROID_NAMESPACE, "scheme",
                                  schemeIdentChars, true) != ATTR_OKAY) {
                     hasErrors = true;
@@ -1197,76 +1332,7 @@ status_t buildResources(Bundle* bundle, const sp<AaptAssets>& assets)
         }
     }
 
-    if (table.validateLocalizations()) {
-        hasErrors = true;
-    }
-    
-    if (hasErrors) {
-        return UNKNOWN_ERROR;
-    }
-
-    // Generate final compiled manifest file.
-    manifestFile->clearData();
-    sp<XMLNode> manifestTree = XMLNode::parse(manifestFile);
-    if (manifestTree == NULL) {
-        return UNKNOWN_ERROR;
-    }
-    err = massageManifest(bundle, manifestTree);
-    if (err < NO_ERROR) {
-        return err;
-    }
-    err = compileXmlFile(assets, manifestTree, manifestFile, &table);
-    if (err < NO_ERROR) {
-        return err;
-    }
-
-    //block.restart();
-    //printXMLBlock(&block);
-
-    // --------------------------------------------------------------
-    // Generate the final resource table.
-    // Re-flatten because we may have added new resource IDs
-    // --------------------------------------------------------------
-
-    if (table.hasResources()) {
-        sp<AaptSymbols> symbols = assets->getSymbolsFor(String8("R"));
-        err = table.addSymbols(symbols);
-        if (err < NO_ERROR) {
-            return err;
-        }
-
-        sp<AaptFile> resFile(getResourceFile(assets));
-        if (resFile == NULL) {
-            fprintf(stderr, "Error: unable to generate entry for resource data\n");
-            return UNKNOWN_ERROR;
-        }
-
-        err = table.flatten(bundle, resFile);
-        if (err < NO_ERROR) {
-            return err;
-        }
-
-        if (bundle->getPublicOutputFile()) {
-            FILE* fp = fopen(bundle->getPublicOutputFile(), "w+");
-            if (fp == NULL) {
-                fprintf(stderr, "ERROR: Unable to open public definitions output file %s: %s\n",
-                        (const char*)bundle->getPublicOutputFile(), strerror(errno));
-                return UNKNOWN_ERROR;
-            }
-            if (bundle->getVerbose()) {
-                printf("  Writing public definitions to %s.\n", bundle->getPublicOutputFile());
-            }
-            table.writePublicDefinitions(String16(assets->getPackage()), fp);
-            fclose(fp);
-        }
-#if 0
-        NOISY(
-              ResTable rt;
-              rt.add(resFile->getData(), resFile->getSize(), NULL);
-              printf("Generated resources:\n");
-              rt.print();
-        )
-#endif
+    if (resFile != NULL) {
         // These resources are now considered to be a part of the included
         // resources, for others to reference.
         err = assets->addIncludedResources(resFile);
@@ -1275,6 +1341,7 @@ status_t buildResources(Bundle* bundle, const sp<AaptAssets>& assets)
             return err;
         }
     }
+    
     return err;
 }