The Tor Browser: mozglue/android/NSSBridge.cpp@129ffea94266 (annotated)

mozglue/android/NSSBridge.cpp@129ffea94266 (annotated)

mozglue/android/NSSBridge.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include <stdlib.h>
 #include "dlfcn.h"
 #include "NSSBridge.h"
 #include "APKOpen.h"
 #ifdef ANDROID
 #include <jni.h>
 #include <android/log.h>
 #endif
 #include "ElfLoader.h"
 #ifdef DEBUG
 #define LOG(x...) __android_log_print(ANDROID_LOG_INFO, "GeckoJNI", x)
 #else
 #define LOG(x...)
 #endif
 static bool initialized = false;
 #define NSS_WRAPPER_INT(name) name ## _t f_ ## name;
 NSS_WRAPPER_INT(NSS_Initialize)
 NSS_WRAPPER_INT(NSS_Shutdown)
 NSS_WRAPPER_INT(SECITEM_ZfreeItem)
 NSS_WRAPPER_INT(PK11SDR_Encrypt)
 NSS_WRAPPER_INT(PK11SDR_Decrypt)
 NSS_WRAPPER_INT(PK11_GetInternalKeySlot)
 NSS_WRAPPER_INT(PK11_NeedUserInit)
 NSS_WRAPPER_INT(PK11_InitPin)
 NSS_WRAPPER_INT(PR_ErrorToString)
 NSS_WRAPPER_INT(PR_GetError)
 NSS_WRAPPER_INT(PR_Free)
 NSS_WRAPPER_INT(PL_Base64Encode)
 NSS_WRAPPER_INT(PL_Base64Decode)
 NSS_WRAPPER_INT(PL_strfree)
 int
 setup_nss_functions(void *nss_handle,
                         void *nspr_handle,
                         void *plc_handle)
 {
   if (nss_handle == nullptr || nspr_handle == nullptr || plc_handle == nullptr) {
     LOG("Missing handle\n");
     return FAILURE;
   }
 #define GETFUNC(name) f_ ## name = (name ## _t) (uintptr_t) __wrap_dlsym(nss_handle, #name); \
   if (!f_ ##name) { __android_log_print(ANDROID_LOG_ERROR, "GeckoJNI", "missing %s", #name);  return FAILURE; }
   GETFUNC(NSS_Initialize);
   GETFUNC(NSS_Shutdown);
   GETFUNC(PK11SDR_Encrypt);
   GETFUNC(PK11SDR_Decrypt);
   GETFUNC(PK11_GetInternalKeySlot);
   GETFUNC(PK11_NeedUserInit);
   GETFUNC(PK11_InitPin);
   GETFUNC(SECITEM_ZfreeItem);
 #undef GETFUNC
 #define NSPRFUNC(name) f_ ## name = (name ## _t) (uintptr_t) __wrap_dlsym(nspr_handle, #name); \
   if (!f_ ##name) { __android_log_print(ANDROID_LOG_ERROR, "GeckoJNI", "missing %s", #name);  return FAILURE; }
   NSPRFUNC(PR_ErrorToString);
   NSPRFUNC(PR_GetError);
   NSPRFUNC(PR_Free);
 #undef NSPRFUNC
 #define PLCFUNC(name) f_ ## name = (name ## _t) (uintptr_t) __wrap_dlsym(plc_handle, #name); \
   if (!f_ ##name) { __android_log_print(ANDROID_LOG_ERROR, "GeckoJNI", "missing %s", #name);  return FAILURE; }
   PLCFUNC(PL_Base64Encode);
   PLCFUNC(PL_Base64Decode);
   PLCFUNC(PL_strfree);
 #undef PLCFUNC
   return SUCCESS;
 }
 /* Throws the current NSS error. */
 static void
 throwError(JNIEnv* jenv, const char * funcString) {
     char *msg;
     PRErrorCode perr = f_PR_GetError();
     char * errString = f_PR_ErrorToString(perr, 0);
     asprintf(&msg, "%s returned error %d: %s\n", funcString, perr, errString);
     LOG("Throwing error: %s\n", msg);
     JNI_Throw(jenv, "java/lang/Exception", msg);
     free(msg);
     LOG("Error thrown\n");
 }
 extern "C" NS_EXPORT jstring JNICALL
 Java_org_mozilla_gecko_NSSBridge_nativeEncrypt(JNIEnv* jenv, jclass,
                                                jstring jPath,
                                                jstring jValue)
 {
     jstring ret = jenv->NewStringUTF("");
     const char* path;
     path = jenv->GetStringUTFChars(jPath, nullptr);
     const char* value;
     value = jenv->GetStringUTFChars(jValue, nullptr);
     char* result;
     SECStatus rv = doCrypto(jenv, path, value, &result, true);
     if (rv == SECSuccess) {
       ret = jenv->NewStringUTF(result);
       free(result);
     }
     jenv->ReleaseStringUTFChars(jValue, value);
     jenv->ReleaseStringUTFChars(jPath, path);
     return ret;
 }
 extern "C" NS_EXPORT jstring JNICALL
 Java_org_mozilla_gecko_NSSBridge_nativeDecrypt(JNIEnv* jenv, jclass,
                                                jstring jPath,
                                                jstring jValue)
 {
     jstring ret = jenv->NewStringUTF("");
     const char* path;
     path = jenv->GetStringUTFChars(jPath, nullptr);
     const char* value;
     value = jenv->GetStringUTFChars(jValue, nullptr);
     char* result;
     SECStatus rv = doCrypto(jenv, path, value, &result, false);
     if (rv == SECSuccess) {
       ret = jenv->NewStringUTF(result);
       free(result);
     }
     jenv->ReleaseStringUTFChars(jValue, value);
     jenv->ReleaseStringUTFChars(jPath, path);
     return ret;
 }
 /* Encrypts or decrypts a string. result should be freed with free() when done */
 SECStatus
 doCrypto(JNIEnv* jenv, const char *path, const char *value, char** result, bool encrypt)
 {
     SECStatus rv;
     PK11SlotInfo *slot;
     if (!initialized) {
       LOG("Initialize crypto in %s\n", path);
       rv = f_NSS_Initialize(path, "", "", "secmod.db", NSS_INIT_NOROOTINIT);
       if (rv != SECSuccess) {
           throwError(jenv, "NSS_Initialize");
           return rv;
       }
       initialized = true;
     }
     slot = f_PK11_GetInternalKeySlot();
     if (!slot) {
       throwError(jenv, "PK11_GetInternalKeySlot");
       return SECFailure;
     }
     if (f_PK11_NeedUserInit(slot)) {
       LOG("Initializing key3.db with default blank password.\n");
       rv = f_PK11_InitPin(slot, nullptr, nullptr);
       if (rv != SECSuccess) {
         throwError(jenv, "PK11_InitPin");
         return rv;
       }
     }
     SECItem request;
     SECItem reply;
     reply.data = 0;
     reply.len = 0;
     if (encrypt) {
       // This can print sensitive data. Uncomment if you need it.
       // LOG("Encrypting: %s\n", value);
       request.data = (unsigned char*)value;
       request.len = strlen(value);
       SECItem keyid;
       keyid.data = 0;
       keyid.len = 0;
       rv = f_PK11SDR_Encrypt(&keyid, &request, &reply, nullptr);
       if (rv != SECSuccess) {
         throwError(jenv, "PK11SDR_Encrypt");
         goto done;
       }
       rv = encode(reply.data, reply.len, result);
       if (rv != SECSuccess) {
           throwError(jenv, "encode");
           goto done;
       }
       LOG("Encrypted: %s\n", *result);
     } else {
       LOG("Decoding: %s\n", value);
       rv = decode(value, &request.data, (int32_t*)&request.len);
       if (rv != SECSuccess) {
           throwError(jenv, "decode");
           return rv;
       }
       rv = f_PK11SDR_Decrypt(&request, &reply, nullptr);
       if (rv != SECSuccess) {
         throwError(jenv, "PK11SDR_Decrypt");
         goto done;
       }
       *result = (char *)malloc(reply.len+1);
       strncpy(*result, (char *)reply.data, reply.len);
       (*result)[reply.len] = '\0';
       // This can print sensitive data. Uncomment if you need it.
       // LOG("Decoded %i letters: %s\n", reply.len, *result);
       free(request.data);
     }
 done:
     f_SECITEM_ZfreeItem(&reply, false);
     return rv;
 }
 /*
  * Base64 encodes the data passed in. The caller must deallocate _retval using free();
  */
 SECStatus
 encode(const unsigned char *data, int32_t dataLen, char **_retval)
 {
   SECStatus rv = SECSuccess;
   char *encoded = f_PL_Base64Encode((const char *)data, dataLen, nullptr);
   if (!encoded)
     rv = SECFailure;
   if (!*encoded)
     rv = SECFailure;
   if (rv == SECSuccess) {
     *_retval = (char *)malloc(strlen(encoded)+1);
     strcpy(*_retval, encoded);
   }
   if (encoded) {
     f_PR_Free(encoded);
   }
   return rv;
 }
 /*
  * Base64 decodes the data passed in. The caller must deallocate result using free();
  */
 SECStatus
 decode(const char *data, unsigned char **result, int32_t *length)
 {
   SECStatus rv = SECSuccess;
   uint32_t len = strlen(data);
   int adjust = 0;
   /* Compute length adjustment */
   if (len > 0 && data[len-1] == '=') {
     adjust++;
     if (data[len-2] == '=') adjust++;
   }
   char *decoded;
   decoded = f_PL_Base64Decode(data, len, nullptr);
   if (!decoded) {
     return SECFailure;
   }
   if (!*decoded) {
     return SECFailure;
   }
   *length = (len*3)/4 - adjust;
   LOG("Decoded %i chars into %i chars\n", len, *length);
   *result = (unsigned char*)malloc((size_t)len);
   if (!*result) {
     rv = SECFailure;
   } else {
     memcpy((char*)*result, decoded, len);
   }
   f_PR_Free(decoded);
   return rv;
 }

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mozglue/android/NSSBridge.cpp@129ffea94266 (annotated)

mozglue/android/NSSBridge.cpp