某应用sign签名算法还原

首先使用jadx对apk进行逆向

搜索关键字 QDSign，可以直接找到对应的类，可以看到参数经过加密得到

进一步跟踪，发现了c类中有如下三个so方法，还有3个loadlibrary,分别进行了hook，发现c-lib动态注册了sign,sos动态注册了s,没有发现crypto有动态注册，使用frida对3个so函数进行了hook，证实sign是QDSign的加密函数，s是AegisSign的加密函数，SignNew并没有调用，搜索java代码，也没有发现调用的地方，猜测可能该函数没有实现，暂时不管了。

先用frida进行hook看看返回结果

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C0025c.sign.implementation = function(v1,v2,v3,v4,v5,v6,v7) {         var ret = this.sign(v1,v2,v3,v4,v5,v6,v7)         console.log("sign params:", v1,v2,v3,v4,v5,v6,v7);         console.log("sign:", Base64Util.a(ret));         return ret;     }

确认结果确实为QDSign的值

通过 jnitrace -l libsos.so 包名 -i RegisterNatives 可以看到是动态注册的函数

直接再执行 jnitrace -l libsos.so 包名 发现程序卡在了闪屏页，原因不明，这种方法在很多应用上都会这样，有大神知道原因吗？

换成程序启动后，进行attach的方式， jnitrace -l libc-lib.so 应用名 -m attach ，貌似没有结果，这个方法在自己的程序上可以正常获取trace，但是在最近逆向的应用上都没有任何输出，原因不明，有没有知道的大佬解答一下？

祭出unidbg大杀器试试，使用模拟23版本，会报错

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JNIEnv->FindClass(android/content/ContextWrapper) was called from RX@0x40002629[libc-lib.so]0x2629 JNIEnv->GetMethodID(android/content/ContextWrapper.getPackageManager()Landroid/content/pm/PackageManager;) => 0x53f2c391 was called from RX@0x4000263f[libc-lib.so]0x263f [14:16:09 117]  WARN [com.github.unidbg.linux.ARM32SyscallHandler] (ARM32SyscallHandler:530) - handleInterrupt intno=2, NR=-1073744244, svcNumber=0x11f, PC=unidbg@0xfffe0284, LR=RX@0x40000af5[libc-lib.so]0xaf5, syscall=null com.github.unidbg.arm.backend.BackendException: dvmObject=android.content.Context@5f2050f6, dvmClass=class android/content/Context, jmethodID=unidbg@0x53f2c391

报以上错误，猜想是不是用的applcationContext、看了下日志,替换为android/content/ContextWrapper后，继续执行，又报错

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Invalid address 0x40344000 passed to free: value not allocated [crash]A/libc: Invalid address 0x40344000 passed to free: value not allocated Exception in thread "main" java.lang.NullPointerException

搜了一圈，没找到有用的信息。

最后想不到办法了，抱着侥幸心理、死马当活马医，换成19版本。。！！！居然成功了！！！

模拟执行sign方法，得到如下结果

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JNIEnv->FindClass(a/c) was called from RX@0x40000b57[libc-lib.so]0xb57 JNIEnv->RegisterNatives(a/c, RW@0x40007000[libc-lib.so]0x7000, 1) was called from RX@0x40000b6d[libc-lib.so]0xb6d RegisterNative(a/c, sign(Landroid/content/Context;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;I)[B, RX@0x400025a9[libc-lib.so]0x25a9) Find native function Java_a_c_sign => RX@0x400025a9[libc-lib.so]0x25a9 JNIEnv->GetStringUtfChars("bookid=1021617576&isoutbook=0") was called from RX@0x40002519[libc-lib.so]0x2519 JNIEnv->ReleaseStringUTFChars("bookid=1021617576&isoutbook=0") was called from RX@0x4000257f[libc-lib.so]0x257f JNIEnv->NewStringUTF("bf0fd95eb2cf2d1750cb5ff9364c5f49") was called from RX@0x4000258d[libc-lib.so]0x258d JNIEnv->GetStringUtfChars("bf0fd95eb2cf2d1750cb5ff9364c5f49") was called from RX@0x400025cf[libc-lib.so]0x25cf JNIEnv->GetStringUtfChars("1641450591209") was called from RX@0x400025df[libc-lib.so]0x25df JNIEnv->GetStringUtfChars("0") was called from RX@0x400025fb[libc-lib.so]0x25fb JNIEnv->GetStringUtfChars("9e450ea5f3dd0b8a") was called from RX@0x4000260b[libc-lib.so]0x260b JNIEnv->GetStringUtfChars("0") was called from RX@0x4000261b[libc-lib.so]0x261b JNIEnv->FindClass(android/content/ContextWrapper) was called from RX@0x40002629[libc-lib.so]0x2629 JNIEnv->GetMethodID(android/content/ContextWrapper.getPackageManager()Landroid/content/pm/PackageManager;) => 0x53f2c391 was called from RX@0x4000263f[libc-lib.so]0x263f JNIEnv->CallObjectMethodV(android.content.ContextWrapper@26ba2a48, getPackageManager() => android.content.pm.PackageManager@17550481) was called from RX@0x40000af5[libc-lib.so]0xaf5 JNIEnv->GetMethodID(android/content/ContextWrapper.getPackageName()Ljava/lang/String;) => 0x8bcc2d71 was called from RX@0x40002665[libc-lib.so]0x2665 JNIEnv->CallObjectMethodV(android.content.ContextWrapper@26ba2a48, getPackageName() => "com.xx") was called from RX@0x40000af5[libc-lib.so]0xaf5 JNIEnv->GetMethodID(android/content/pm/PackageManager.getPackageInfo(Ljava/lang/String;I)Landroid/content/pm/PackageInfo;) => 0x3bca8377 was called from RX@0x4000268f[libc-lib.so]0x268f JNIEnv->CallObjectMethodV(android.content.pm.PackageManager@17550481, getPackageInfo("com.xx", 0x40) => android.content.pm.PackageInfo@180bc464) was called from RX@0x40000af5[libc-lib.so]0xaf5 JNIEnv->GetFieldID(android/content/pm/PackageInfo.versionName Ljava/lang/String;) => 0xbcc0232a was called from RX@0x400026c5[libc-lib.so]0x26c5 JNIEnv->GetObjectField(android.content.pm.PackageInfo@180bc464, versionName Ljava/lang/String; => "7.9.178") was called from RX@0x400026d3[libc-lib.so]0x26d3 JNIEnv->GetStringUtfChars("7.9.178") was called from RX@0x400026e3[libc-lib.so]0x26e3 JNIEnv->GetFieldID(android/content/pm/PackageInfo.signatures [Landroid/content/pm/Signature;) => 0x25f17218 was called from RX@0x400026fb[libc-lib.so]0x26fb JNIEnv->GetObjectField(android.content.pm.PackageInfo@180bc464, signatures [Landroid/content/pm/Signature; => [android.content.pm.Signature@3a82f6ef]) was called from RX@0x4000270b[libc-lib.so]0x270b JNIEnv->GetArrayLength([android.content.pm.Signature@3a82f6ef] => 1) was called from RX@0x40002719[libc-lib.so]0x2719 JNIEnv->GetObjectArrayElement([android.content.pm.Signature@3a82f6ef], 0) => android.content.pm.Signature@3a82f6ef was called from RX@0x40002727[libc-lib.so]0x2727 JNIEnv->GetMethodID(android/content/pm/Signature.toCharsString()Ljava/lang/String;) => 0x7a908191 was called from RX@0x40002745[libc-lib.so]0x2745 JNIEnv->CallObjectMethodV(android.content.pm.Signature@3a82f6ef, toCharsString() => "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") was called from RX@0x40000af5[libc-lib.so]0xaf5 JNIEnv->GetStringUtfChars("308202253082018ea00302010202044e239460300d06092a864886f70d0101050500305731173015060355040a0c0ec386c3b0c2b5c3a3c396c390c38e311d301b060355040b0c14c386c3b0c2b5c3a3c396c390c38ec384c38dc3b8311d301b06035504030c14c386c3b0c2b5c3a3c396c390c38ec384c38dc3b8301e170d3131303731383032303331325a170d3431303731303032303331325a305731173015060355040a0c0ec386c3b0c2b5c3a3c396c390c38e311d301b060355040b0c14c386c3b0c2b5c3a3c396c390c38ec384c38dc3b8311d301b06035504030c14c386c3b0c2b5c3a3c396c390c38ec384c38dc3b830819f300d06092a864886f70d010101050003818d0030818902818100a3d47f8bfd8d54de1dfbc40a9caa88a43845e287e8f40da2056be126b17233669806bfa60799b3d1364e79a78f355fd4f72278650b377e5acc317ff4b2b3821351bcc735543dab0796c716f769c3a28fedc3bca7780e5fff6c87779f3f3cdec6e888b4d21de27df9e7c21fc8a8d9164bfafac6df7d843e59b88ec740fc52a3c50203010001300d06092a864886f70d0101050500038181001f7946581b8812961a383b2d860b89c3f79002d46feb96f2a505bdae57097a070f3533c42fc3e329846886281a2fbd5c87685f59ab6dd71cc98af24256d2fbf980ded749e2c35eb0151ffde993193eace0b4681be4bcee5f663dd71dd06ab64958e02a60d6a69f21290cb496dd8784a4c31ebadb1b3cc5cb0feebdaa2f686ee2") was called from RX@0x40002519[libc-lib.so]0x2519 JNIEnv->ReleaseStringUTFChars("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") was called from RX@0x4000257f[libc-lib.so]0x257f JNIEnv->NewStringUTF("f189adc92b816b3e9da29ea304d4a7e4") was called from RX@0x4000258d[libc-lib.so]0x258d JNIEnv->GetStringUtfChars("f189adc92b816b3e9da29ea304d4a7e4") was called from RX@0x40002767[libc-lib.so]0x2767 JNIEnv->ReleaseStringUTFChars("0") was called from RX@0x400027e1[libc-lib.so]0x27e1 JNIEnv->ReleaseStringUTFChars("9e450ea5f3dd0b8a") was called from RX@0x400027ef[libc-lib.so]0x27ef JNIEnv->ReleaseStringUTFChars("0") was called from RX@0x400027fd[libc-lib.so]0x27fd JNIEnv->ReleaseStringUTFChars("7.9.178") was called from RX@0x4000280b[libc-lib.so]0x280b JNIEnv->NewByteArray(128) was called from RX@0x400024b9[libc-lib.so]0x24b9 JNIEnv->SetByteArrayRegion([B@2a5ca609, 0, 128, unidbg@0x8048d38) was called from RX@0x400024cf[libc-lib.so]0x24cf JNIEnv->ReleaseStringUTFChars("bf0fd95eb2cf2d1750cb5ff9364c5f49") was called from RX@0x4000283d[libc-lib.so]0x283d JNIEnv->ReleaseStringUTFChars("f189adc92b816b3e9da29ea304d4a7e4") was called from RX@0x4000284d[libc-lib.so]0x284d

观察在sign方法中获取了参数、版本号、签名，然后进行了两次md5,最后输出了一个128位的字节数组，经过测试，两个md5分别为对请求参加md5,对签名进行md5。

sign函数返回的是字节数组，看了下jadx解析出来的工具类的名字为Base64Util，遂想到先用android的Base64一下，看看结果如何。可以看出，应用的base64函数做过特殊处理，在中间插入了两个空格，看来需要直接使用它原来的方法比较好。

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//m39789a(ret.getValue()) R7TCs6Tou2X528j+NblfBuhFR2mLg5WEyNivv5UU4IC0wPHa6I06PG69U9DL 3dCj1aYsauB5Fkf6kQJy57OjgGSf2EXDkAcm2Rvoe8vyU7K+oimgA0khxrjZ Tqqj7rjhmQzKcbXBnRQDC3cssqP8oyU0V/kcuXoJmeS5vvMPB8o= //Base64Android.encode(ret.getValue(),2) R7TCs6Tou2X528j+NblfBuhFR2mLg5WEyNivv5UU4IC0wPHa6I06PG69U9DL3dCj1aYsauB5Fkf6kQJy57OjgGSf2EXDkAcm2Rvoe8vyU7K+oimgA0khxrjZTqqj7rjhmQzKcbXBnRQDC3cssqP8oyU0V/kcuXoJmeS5vvMPB8o=

此时需要逆向 包名.core.util.e(这个类是Base64Util)下的public static String m39789a(byte[] bArr)函数，可以看出，该函数逻辑恢复不正确；

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public static String m39789a(byte[] bArr) {         AppMethodBeat.m13386i(132653);         int length = bArr.length;         StringBuilder sb = new StringBuilder((bArr.length * 3) / 2);         int i = length - 3;         int i2 = 0;         loop0: while (true) {             int i3 = 0;             while (i2 <= i) {                 int i4 = ((bArr[i2] & UByte.MAX_VALUE) << 16) | ((bArr[i2 + 1] & UByte.MAX_VALUE) << 8) | (bArr[i2 + 2] & UByte.MAX_VALUE);                 char[] cArr = f14341a;                 sb.append(cArr[(i4 >> 18) & 63]);                 sb.append(cArr[(i4 >> 12) & 63]);                 sb.append(cArr[(i4 >> 6) & 63]);                 sb.append(cArr[i4 & 63]);                 i2 += 3;                 int i5 = i3 + 1;                 if (i3 >= 14) {                     break;                 }                 i3 = i5;             }             sb.append(" ");         }         int i6 = 0 + length;         if (i2 == i6 - 2) {             int i7 = ((bArr[i2 + 1] & UByte.MAX_VALUE) << 8) | ((bArr[i2] & UByte.MAX_VALUE) << 16);             char[] cArr2 = f14341a;             sb.append(cArr2[(i7 >> 18) & 63]);             sb.append(cArr2[(i7 >> 12) & 63]);             sb.append(cArr2[(i7 >> 6) & 63]);             sb.append(ContainerUtils.KEY_VALUE_DELIMITER);         } else if (i2 == i6 - 1) {             int i8 = (bArr[i2] & UByte.MAX_VALUE) << 16;             char[] cArr3 = f14341a;             sb.append(cArr3[(i8 >> 18) & 63]);             sb.append(cArr3[(i8 >> 12) & 63]);             sb.append("==");         }         String sb2 = sb.toString();         AppMethodBeat.m13385o(132653);         return sb2;     }

于是通过jadx的信息，定位该dex位于classes3.dex中，通过dex2jar，获得了对应的jar压缩包；

由于压缩包中其他的类，并不是本次关注对象，单独提取 包名.core.util.e.class，扔到在线反编译网站，选择Procyon引擎进行逆向后得到

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public static String m39789a(byte[] array) {        System.out.println(leviathan.bytesToHexString(array));        final int length = array.length;        final StringBuilder sb = new StringBuilder(array.length * 3 / 2);        int i = 0;        Label_0025:        while (true) {            int n = 0;            while (i <= length - 3) {                final int n2 = (array[i] & 0xFF) << 16 | (array[i + 1] & 0xFF) << 8 | (array[i + 2] & 0xFF);                final char[] a = f14341a;                sb.append(a[n2 >> 18 & 0x3F]);                sb.append(a[n2 >> 12 & 0x3F]);                sb.append(a[n2 >> 6 & 0x3F]);                sb.append(a[n2 & 0x3F]);                i += 3;                if (n >= 14) {                    sb.append(" ");                    continue Label_0025;                }                ++n;            }            break;        }        final int n3 = 0 + length;        if (i == n3 - 2) {            final int n4 = (array[i + 1] & 0xFF) << 8 | (array[i] & 0xFF) << 16;            final char[] a2 = f14341a;            sb.append(a2[n4 >> 18 & 0x3F]);            sb.append(a2[n4 >> 12 & 0x3F]);            sb.append(a2[n4 >> 6 & 0x3F]);            sb.append("=");        } else if (i == n3 - 1) {            final int n5 = (array[i] & 0xFF) << 16;            final char[] a3 = f14341a;            sb.append(a3[n5 >> 18 & 0x3F]);            sb.append(a3[n5 >> 12 & 0x3F]);            sb.append("==");        }        final String string = sb.toString();        return string;    }

通过该函数解析字节数组，得到了最终的加密参数。

下面该还原so中的具体加密细节了。

打开IDA查看函数，通过unidbg模拟可以看到动态注册函数位置位于0x25a9，查看伪代码，可以看到对参数进行了拼接

这些参数通过对比unidbg日志，除了src不知道是什么，其余都对应上了，那接下来，hook下strcat

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xHook.register("libc-lib.so", "strcat", new ReplaceCallback() {            @Override            public HookStatus onCall(Emulator<?> emulator, HookContext context, long originFunction) {                Pointer pointer1 = context.getPointerArg(0);                Pointer pointer = context.getPointerArg(1);                String str = pointer0.getString(0);                String str1 = pointer1.getString(0);                System.out.println("strcat=" + str + ":" + str1);                return HookStatus.RET(emulator, originFunction);            }            @Override            public void postCall(Emulator<?> emulator, HookContext context) {                System.out.println("strcat=" + ", ret=" + context.getPointerArg(0).getString(0));            }        }, true);

可以得出src的值

再往下分析，得出2488函数是最终进行加密的函数，继续跟进，看到如下代码

可以看到DES_ede3_cbc_encrypt关键字，搜索google，发现有一个openssl库一模一样的函数，参数个数也对应上了，

得出v24是输入参数，v27、v26、v25分别为秘钥1、2、3，v21为初始化向量。懒得找一个openssl库来实验了，我先想办法得到秘钥，向量已经在代码中看到了，既是01234567。

hook函数DES_ede3_cbc_encrypt

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xHook.register("libc-lib.so", "DES_ede3_cbc_encrypt", new ReplaceCallback() {             @Override             public HookStatus onCall(Emulator<?> emulator, HookContext context, long originFunction) {                 Pointer pointer0 = context.getPointerArg(0);                 Pointer pointer3 = context.getPointerArg(3);                 Pointer pointer4 = context.getPointerArg(4);                 Pointer pointer5 = context.getPointerArg(5);                 Pointer pointer6 = context.getPointerArg(6);                 byte[] str = pointer0.getByteArray(0,8);                 byte[] str3 = pointer3.getByteArray(0,8);                 byte[] str4 = pointer4.getByteArray(0,8);                 byte[] str5 = pointer5.getByteArray(0,8);                 byte[] str6 = pointer6.getByteArray(0,8);                 Inspector.inspect(str, "memcpy src=" + pointer0);                 Inspector.inspect(str3, "memcpy v3=" + pointer3);                 Inspector.inspect(str4, "memcpy v4=" + pointer4);                 Inspector.inspect(str5, "memcpy v5=" + pointer5);                 Inspector.inspect(str6, "memcpy v6=" + pointer6); //                System.out.println("DES_ede3_cbc_encrypt=" + str + ":" + str3+":"+str4 +":"+str5+":"+str6);                 return HookStatus.RET(emulator, originFunction);             }             @Override             public void postCall(Emulator<?> emulator, HookContext context) { //                System.out.println("DES_ede3_cbc_encrypt=" + ", ret=" + context.getPointerArg(0).getString(0));             }         }, true);

结果如下

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[17:48:46 063]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 063]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 063]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 064]memcpy v6=unidbg@0xbffff480, md5=2e9ec317e197819358fbc43afca7d837, hex=3031323334353637 size: 8 0000: 30 31 32 33 34 35 36 37                            01234567 ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 067]memcpy src=unidbg@0xbffff490, md5=af22f93ebcfbe719516ed5198566bfe9, hex=7a63657c31363431 size: 8 0000: 7A 63 65 7C 31 36 34 31                            zce|1641 ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 067]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 067]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 067]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 068]memcpy v6=unidbg@0xbffff480, md5=bb5eac7391e75091af9cd5079c461b67, hex=47b4c2b3a4e8bb65 size: 8 0000: 47 B4 C2 B3 A4 E8 BB 65                            G......e ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 068]memcpy src=unidbg@0xbffff490, md5=7848ac6c12f2f4d327802cd176ac5772, hex=3435303539313230 size: 8 0000: 34 35 30 35 39 31 32 30                            45059120 ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 068]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 070]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 070]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 070]memcpy v6=unidbg@0xbffff480, md5=baa8e3fb252aee490431254a5717d676, hex=f9dbc8fe35b95f06 size: 8 0000: F9 DB C8 FE 35 B9 5F 06                            ....5._. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 071]memcpy src=unidbg@0xbffff490, md5=9064ae0c2b1da5f5ce4ab89da47fdf84, hex=397c307c39653435 size: 8 0000: 39 7C 30 7C 39 65 34 35                            9|0|9e45 ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 071]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 071]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 071]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 071]memcpy v6=unidbg@0xbffff480, md5=32c93a641f13a755bf0351cf834d391e, hex=e84547698b839584 size: 8 0000: E8 45 47 69 8B 83 95 84                            .EGi.... ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 071]memcpy src=unidbg@0xbffff490, md5=d8f51a6751018766110c703a4ec683cc, hex=3065613566336464 size: 8 0000: 30 65 61 35 66 33 64 64                            0ea5f3dd ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 072]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 072]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 072]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 072]memcpy v6=unidbg@0xbffff480, md5=e4041e6bb89cb6fa65bb1e1e9931bfe6, hex=c8d8afbf9514e080 size: 8 0000: C8 D8 AF BF 95 14 E0 80                            ........ ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 073]memcpy src=unidbg@0xbffff490, md5=d1354fdcee14fd741630488ec469f587, hex=306238617c317c37 size: 8 0000: 30 62 38 61 7C 31 7C 37                            0b8a|1|7 ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 073]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 073]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 073]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 073]memcpy v6=unidbg@0xbffff480, md5=7b92bd69841bb6940288ad15cc2d6f51, hex=b4c0f1dae88d3a3c size: 8 0000: B4 C0 F1 DA E8 8D 3A 3C                            ......:< ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 074]memcpy src=unidbg@0xbffff490, md5=0b118370d01046b8dd7d424c62736733, hex=2e392e3137387c30 size: 8 0000: 2E 39 2E 31 37 38 7C 30                            .9.178|0 ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 074]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 074]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 074]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 074]memcpy v6=unidbg@0xbffff480, md5=be9e6d23aa1673ecd64454aceed715a3, hex=6ebd53d0cbddd0a3 size: 8 0000: 6E BD 53 D0 CB DD D0 A3                            n.S..... ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 075]memcpy src=unidbg@0xbffff490, md5=2123366ad8ef13c3b1c60c9942a0cf62, hex=7c62663066643935 size: 8 0000: 7C 62 66 30 66 64 39 35                            |bf0fd95 ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 075]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 075]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 075]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 075]memcpy v6=unidbg@0xbffff480, md5=100457bc026ef3ba622f06c133bac14a, hex=d5a62c6ae0791647 size: 8 0000: D5 A6 2C 6A E0 79 16 47                            ..,j.y.G ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 075]memcpy src=unidbg@0xbffff490, md5=fb9842ea1ba2429f73b3b371399253cf, hex=6562326366326431 size: 8 0000: 65 62 32 63 66 32 64 31                            eb2cf2d1 ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 076]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 076]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 076]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 076]memcpy v6=unidbg@0xbffff480, md5=9529b4cda652c51d4fa7d31b71e9c6a1, hex=fa910272e7b3a380 size: 8 0000: FA 91 02 72 E7 B3 A3 80                            ...r.... ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 076]memcpy src=unidbg@0xbffff490, md5=d8c9b448f3b3b06be3cf184444d65210, hex=3735306362356666 size: 8 0000: 37 35 30 63 62 35 66 66                            750cb5ff ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 076]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 077]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 077]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 077]memcpy v6=unidbg@0xbffff480, md5=c035c2c6d97c6be7b07576e1c186d78b, hex=649fd845c3900726 size: 8 0000: 64 9F D8 45 C3 90 07 26                            d..E...& ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 077]memcpy src=unidbg@0xbffff490, md5=83cecf0241c488028fb908e9e93990ec, hex=3933363463356634 size: 8 0000: 39 33 36 34 63 35 66 34                            9364c5f4 ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 077]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 077]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 078]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 078]memcpy v6=unidbg@0xbffff480, md5=8966f02efec8d51bd3a6a118bccf2057, hex=d91be87bcbf253b2 size: 8 0000: D9 1B E8 7B CB F2 53 B2                            ...{..S. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 078]memcpy src=unidbg@0xbffff490, md5=4c82a29f8d6555410b5aa470eacf4f60, hex=397c663138396164 size: 8 0000: 39 7C 66 31 38 39 61 64                            9|f189ad ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 078]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 078]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 079]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 079]memcpy v6=unidbg@0xbffff480, md5=18cdd13b7aaf46150bd973bea901dd15, hex=bea229a0034921c6 size: 8 0000: BE A2 29 A0 03 49 21 C6                            ..)..I!. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 079]memcpy src=unidbg@0xbffff490, md5=142f4c4991a2701942ff4667ca0ff143, hex=6339326238313662 size: 8 0000: 63 39 32 62 38 31 36 62                            c92b816b ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 079]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 079]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 080]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 080]memcpy v6=unidbg@0xbffff480, md5=e452af0097e0b69bfcb0b0147e8a6aa0, hex=b8d94eaaa3eeb8e1 size: 8 0000: B8 D9 4E AA A3 EE B8 E1                            ..N..... ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 080]memcpy src=unidbg@0xbffff490, md5=999f4d65efbaabf5aeaa49dbfc040ac7, hex=3365396461323965 size: 8 0000: 33 65 39 64 61 32 39 65                            3e9da29e ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 080]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 080]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 081]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 081]memcpy v6=unidbg@0xbffff480, md5=70a57703e3c3cd8a08f251219fc0c0d4, hex=990cca71b5c19d14 size: 8 0000: 99 0C CA 71 B5 C1 9D 14                            ...q.... ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 081]memcpy src=unidbg@0xbffff490, md5=95e5fff13ce7c5e70115fc3973376d3d, hex=6133303464346137 size: 8 0000: 61 33 30 34 64 34 61 37                            a304d4a7 ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 081]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 081]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 081]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 082]memcpy v6=unidbg@0xbffff480, md5=872400f9cd80b45059b121ff47ad88ef, hex=030b772cb2a3fca3 size: 8 0000: 03 0B 77 2C B2 A3 FC A3                            ..w,.... ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 082]memcpy src=unidbg@0xbffff490, md5=bac52abca69fc8ba330f5328eee30c27, hex=6534060606060606 size: 8 0000: 65 34 06 06 06 06 06 06                            e4...... ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 082]memcpy v3=unidbg@0xbffff598, md5=7e504a51a397f262e2e74221ac9c0ed2, hex=105cbc14004d0409 size: 8 0000: 10 5C BC 14 00 4D 04 09                            .\...M.. ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 082]memcpy v4=unidbg@0xbffff518, md5=e3e90fb9215af3c1234464ee1e03fa59, hex=209c4c080d4d0043 size: 8 0000: 20 9C 4C 08 0D 4D 00 43                             .L..M.C ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 082]memcpy v5=unidbg@0xbffff498, md5=59cdb4763bce351d1c97d71662a0a67f, hex=14804cd4044dc746 size: 8 0000: 14 80 4C D4 04 4D C7 46                            ..L..M.F ^-----------------------------------------------------------------------------^ >-----------------------------------------------------------------------------< [17:48:46 082]memcpy v6=unidbg@0xbffff480, md5=e8f6f77bf6276dacec2da2bfbf84dfc2, hex=253457f91cb97a09 size: 8 0000: 25 34 57 F9 1C B9 7A 09                            %4W...z. ^-----------------------------------------------------------------------------^

看这个日志输出,三个秘钥都不相同,看不出是个啥，往回看秘钥来源于0xb88函数，hook这个函数

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hookZz.wrap(module.base + 0x00000b88 + 1, new WrapCallback<RegisterContext>() {             @Override             public void preCall(Emulator<?> emulator, RegisterContext ctx, HookEntryInfo info) {                 System.out.println(ctx.getPointerArg(0) +"     b88=" + ctx.getPointerArg(1) + ", R10=0x" + ctx.getPointerArg(2));             }             @Override             public void postCall(Emulator<?> emulator, RegisterContext ctx, HookEntryInfo info) {                 super.postCall(emulator, ctx, info);                 System.out.println("b88:  " + ctx.getPointerArg(0).getString(0));             }         });

得到了一个字符串，搜索google找到DES_ede3_cbc_encrypt对应的java方法实验一下

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public static void encrypt_des_ede_cbc_pkcs(String content) throws Exception     {         byte[] in = content.getBytes("UTF-8");         Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");         SecretKeyFactory skf = SecretKeyFactory.getInstance("DESede");         SecretKey sk = skf.generateSecret(new DESedeKeySpec("xxxx".getBytes()));         IvParameterSpec ips = new IvParameterSpec("xxx".getBytes());         cipher.init(Cipher.ENCRYPT_MODE, sk, ips);         byte[] out = cipher.doFinal(in);     }

然后把两个字节比较之后发现一模一样，说明秘钥正确。