ideawu / objective-c-rsa

Doing RSA encryption and decryption with Objective-C on iOS

Objective-C-RSA

Doing RSA encryption with Objective-C iOS

If you have the same qustion as mine: iOS Objective-C RSA encrypt with only public key and descrypt with PHP

Usage

#import "RSA.h"

NSString *pubkey = @"-----BEGIN PUBLIC KEY-----\nMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDDI2bvVLVYrb4B0raZgFP60VXY\ncvRmk9q56QiTmEm9HXlSPq1zyhyPQHGti5FokYJMzNcKm0bwL1q6ioJuD4EFI56D\na+70XdRz1CjQPQE3yXrXXVvOsmq9LsdxTFWsVBTehdCmrapKZVVx6PKl7myh0cfX\nQmyveT/eqyZK1gYjvQIDAQAB\n-----END PUBLIC KEY-----";
NSString *privkey = @"-----BEGIN PRIVATE KEY-----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\n5xd0pcy9O2DOeso=\n-----END PRIVATE KEY-----";

NSString *encrypted = [RSA encryptString:@"hello world!" publicKey:pubkey];
NSLog(@"encrypted: %@", encrypted);
NSString *decrypted = [RSA decryptString:encrypted privateKey:privkey];
NSLog(@"decrypted: %@", decrypted);

Notice: iOS 10 requires Keychain Entitlements

Important

Not thread-safe.

History

2015-09-26

• New functions:
  • (NSString *)decryptString:(NSString *)str privateKey:(NSString *)privKey;
  • (NSData *)decryptData:(NSData *)data privateKey:(NSString *)privKey;

The PHP script for testing

See encrypt.php in the repository.

Swift version

• https://github.com/btnguyen2k/swift-rsautils

objective-c-rsa's Issues

为什么对同一字符串多次运行结果都不一样

我对 @"123456"

加密后，， 运行多次，发现每次结果都不一样

这个库有两个严重的问题，使用前必看！！！

前一段时间做 RSA 加密，使用了这个库，上线后出现大量解密失败的数据，整了这么大个坑，年终奖都要泡汤了，心里哇凉哇凉的。。。

• +[RSA addPublicKey:], +[RSA addPrivateKey:]这两个方法线程不安全，并发读写 Keychain 数据时，会出现获取密钥失败的情况，导致加密失败

• 读写 Keychain 数据时，用了一个默认的标记 tag RSAUtil_PubKey 、RSAUtil_PrivKey ，许多 SDK 都使用了这个库，而且没有修改 tag，如果不修改 tag，并发环境下，有可能读到其他 SDK 的密钥，导致加密数据错乱

Xcode8

Xcode8上运行demo失败，加密一直为空。

Mac OSX Support

Hello,

i found this useful obc-c class and tested it. It works on iOS but not on OSX. I was searching all over the internet an i didn't find any class for OSX. Can be this somehow modified or are u planning OSX support?

Thanks for info, have a nice day

加密解密与签名验签

这个好像只提供了加密解密,没有提供签名.签名是需要使用己方私钥加密的.

为什么我解密返回值为nil；

NSData *decryData= [[NSData alloc]initWithBytes:u->data length:256];

NSData *priData = [RSA decryptData:decryData privateKey:priKey];

decryData有值，priData 没有值。

貌似在这里返回为空的，是不是不能够解密长度为256的data。
unsigned char *c_key = (unsigned char *)[d_key bytes];
unsigned int idx = 22; //magic byte at offset 22

if (0x04 != c_key[idx++]) return nil;

ps，我需要加密和解密的都是byte数组，以为提供的接口是nsdata，所以我需要转为BYTE。
最后还是要感谢你的分享。

请问，用私钥加密的功能还不能用吗？

RSA.h的注释：
enc with private key NOT working YET!

我想请教一下如何改成NSASCIIStringEncoding编码来进行加密？

我自己想改成NSASCIIStringEncoding编码的加密方式，因为分段加密的分段逻辑是我们自己做的，但是考虑到汉字是多字节， 用NSASCIIStringEncoding编码后和密钥长度进行比较然后分段才才合适，但是我简单的改了编码方式后就出问题了，请问如何修改编码方式呢？

Decrypt pdf file with public key on iOS

Hello,
I want to encrypt a pdf file with public key before sending it to the server where i can decrypt it with a private key.
Before that, I was using the demo application on ios and I was trying to read pdf file as NSData then generate the encrytion and decryption result in order to validate the output of the hole process , in other words , I wanted to check if the output file after the encrytion and decryption is still a valid pdf file like the original one.
Unfortenetly , it seems that the output file is corrupted since I get this error when I tried to show the final pdf file on a webview .

failed to find `endstream' marker; trying to recover.
FlateDecode: decoding error: invalid bit length repeat.

Would I need any license to use this code if I submit my Application to the AppStore?

As stated in the Developer Program License Agreement:

Section 2.3, You certify that (i) none of the Licensed Applications contains, uses or supports any data encryption or cryptographic functions; or (ii) in the event that any Licensed Application contains, uses or supports any such data encryption or cryptographic functionality, You certify that You have complied with the United States Export Administration Regulations, and are in possession of, and will, upon request, provide Apple with a PDF copy of Your Encryption Registration Number (ERN), or export classification ruling (CCATS) issued by the United States Commerce Department, Bureau of Industry and Security and PDF copies of appropriate authorizations from other countries that mandate import authorizations for that Licensed Application, as required.

https://developer.apple.com/programs/terms/ios/standard/ios_program_standard_agreement_20140909.pdf

Or even better, have any successfully submit their app to the store with this code?

解密不成功，用的我自己生成公钥私钥，demo中的可以

生成方法 参考
http://blog.csdn.net/lvxiangan/article/details/45318443

生成的公钥私钥如下

NSString *pubkey3 = @"-----BEGIN PUBLIC KEY-----\
\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0kEAhcOo1tdfjDIJBVhK\
\nRHadXe3dkJNmcku93lXOIdP4KA60KiymAnCsDn5hnKXBsw9JRLjfVx7XUdXgo+ED\
\nQ/ik30tvRad7j7IMT4y+aThoe9v/cIFL1VPAaN6FKtbCbn/sLznU0B1hO77fSZIw\
\n70GIxIClmzQE4xn4f6FFphucawE8EMeCIEtyQPpL/UQ4QqCEmrZEUsooFnPMCEw8\
\nWtiQNqzvTVE0PQe3fAEToD5GGZ7zMDtZOW2QwlFsicNP9SgndDTSkGCkxM+qZIsn\
\ny5rOhCCdof62QjLRGiM4TnEwdc3V7LeV/vdVtp+pDQlUr/YEoV6blnib/NgTgDLh\
\nbwIDAQAB\
\n-----END PUBLIC KEY-----";
NSString *privkey3 = @"-----BEGIN RSA PRIVATE KEY-----\
\nMIIEpAIBAAKCAQEA0kEAhcOo1tdfjDIJBVhKRHadXe3dkJNmcku93lXOIdP4KA60\
\nKiymAnCsDn5hnKXBsw9JRLjfVx7XUdXgo+EDQ/ik30tvRad7j7IMT4y+aThoe9v/\
\ncIFL1VPAaN6FKtbCbn/sLznU0B1hO77fSZIw70GIxIClmzQE4xn4f6FFphucawE8\
\nEMeCIEtyQPpL/UQ4QqCEmrZEUsooFnPMCEw8WtiQNqzvTVE0PQe3fAEToD5GGZ7z\
\nMDtZOW2QwlFsicNP9SgndDTSkGCkxM+qZIsny5rOhCCdof62QjLRGiM4TnEwdc3V\
\n7LeV/vdVtp+pDQlUr/YEoV6blnib/NgTgDLhbwIDAQABAoIBAQCBhgPBY9B+UX2O\
\nC0DdZw+Rb5TwSVnF99gTry9PaYKr+j4Ux0Ib/Rdjx29nGlodu0tBeLhFOrJzpA83\
\nXc+ehT6Sv/kpifoJaezHkALfeq/OeC59pwCMmUpTJ94PfI2C33w1wF6KlVDRyFef\
\nC63YT9QPgEq16x6aJwifst8QGRSkB56CjMvsHE9PSOFMPMY/lR2J3G1EBZVyra5j\
\nM+7gQWFY6osgo1Pzn+4T8/9s2cJOu1nrLRbaWGyeNFuVOAF4Q8D8/6XLQa71oV7e\
\nhDxFIvmEmCy5c443XGq5B1re0hGJx8QuxYUuUaM76G92rxVHxk/a0D2r87XxiY71\
\nMQkF8KqRAoGBAOzzlNGlCA/HwSezx69NAXYowznol8bmIN9HM92XBAhLH8BOD8Ud\
\nz7Ue5/BFQDzkW+XvI4bcta8OXSJ3cGBUsfiiaACC32+RtxiktTFR0Q73QJj8qSHp\
\nn0TyVycm556yZNZGU7XwcDkPKBzMeXLu4S6q8tM8tvOJpvgXu7CIsDLnAoGBAOMn\
\n/U03JhpK8bUG1yxyTUOmyl6sSvSbFpthkdRhXWWmx/xOaEp1/eGHW1RJWzGR9Epz\
\nksOCrwukd3cKC9m9E/iRG+mE8I2DwU2uZFOQhZ2kS/9Hb1F/MxM0SZcAo0cAbBzD\
\nrYL8i9WoOr37wSAdqjIfnj/hf3Za509niUvI5pQ5AoGANolpu0bssBUd0/GBCEwF\
\nBhkjtfRe2pyk/D77JQlZGD+SM0TERG40HE/cumR2AI3eyPFdj/DEsGHx9bjf2Iwl\
\n2kAnB9cXbipvpfBi89MM9xDZgVzF4NRQoCHXBV/i95e/tcHCCqIocjmW1eoKGfX5\
\nRjB6azwSL8OC9p8fx+XuCAkCgYEAg77bwH7t0G4LBc0z2wloGoaP9JzE1F1mnTPX\
\nmm/l9WDnuEPZZOZOGxGgPKBXDcbzAoNJaa9PytbWmunuuZhaDt5KbAO4aLszz9QH\
\nSBgYBrgVg7dwrrmxa7/1tmieSj3KdlxfNAs5Ju/tMebjuba60VtZMv+cJ47NfVY1\
\nYQjiArECgYA229nt/888DntuvZQrSde4cEtthVFahgNqHq87lyC1htuwMirKkN+e\
\nnyFw/TV7RcDUctoJ9DRGfwwgIVGdzKx/2iiktfejryBxZX8RB/uIBEKuf+Z6VT8S\
\nkiAnhIGqUu8DUniqsyRztGTTcPx3DDCLBeo/00Q2k9ri1i7+r3Fj1A==\
\n-----END RSA PRIVATE KEY-----";

请问有C#服务器的解密算法么？

请问有C#服务器的加密和解密算法么？

使用公钥加密后 java后台不能解密

使用公钥加密后 java后台不能解密

iOS9真机 加密有时会不成功 怎么解决

这个不支持分段加密吧

Encryption not working sporadically

Sometimes the code would return nil at this point:

on RSA.m line 150

if ((status != noErr) && (status != errSecDuplicateItem)) {
    return nil;
}

I'm getting a status -34018

Sometimes it works just fine. Others it doesn't. Always using the same Public Key.
Why could that happen?

应用在锁屏的时候解密失败，返回nil

SecKeyRef keyRef = [self addPrivateKey:privKey];

锁屏的时候这行代码不执行，解密就返回nil

内存泄露

加密解密 都有内存泄露 怎么处理

RSA 加密线上失败，调试无法重现

你好，我们 App 在发布到 App Store 后，RSA 加密失败率挺高的，但是我们本地开发调试时，没有遇到过，也无法重现。发生错误的机型和系统，基本全覆盖。

需要说明的是，在这之前我们对代码做过一些修改。首先是把 RSA 类改为了 NSString 的分类；其次，由于需要对钥匙串做 Delete -> Add -> Matching 的操作，在多线程环境下发生了错误，就对这一部分代码加了 @synchronized 同步锁，如下：

    @synchronized ([UIApplication sharedApplication]) {
        //a tag to read/write keychain storage
        NSString *tag = @"RSAUtil_PubKey";
        NSData *d_tag = [NSData dataWithBytes:[tag UTF8String] length:[tag length]];
        
        // Delete any old lingering key with the same tag
        NSMutableDictionary *publicKey = [[NSMutableDictionary alloc] init];
        [publicKey setObject:(__bridge id)kSecClassKey forKey:(__bridge id)kSecClass];
        [publicKey setObject:(__bridge id)kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType];
        [publicKey setObject:d_tag forKey:(__bridge id)kSecAttrApplicationTag];
        SecItemDelete((__bridge CFDictionaryRef)publicKey);
        
        // Add persistent version of the key to system keychain
        [publicKey setObject:data forKey:(__bridge id)kSecValueData];
        [publicKey setObject:(__bridge id)kSecAttrKeyClassPublic forKey:(__bridge id)kSecAttrKeyClass];
        [publicKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnPersistentRef];
        
        CFTypeRef persistKey = nil;
        OSStatus status = SecItemAdd((__bridge CFDictionaryRef)publicKey, &persistKey);
        if (persistKey != nil){
            CFRelease(persistKey);
        }
        if ((status != noErr) && (status != errSecDuplicateItem)) {
            return nil;
        }
        
        [publicKey removeObjectForKey:(__bridge id)kSecValueData];
        [publicKey removeObjectForKey:(__bridge id)kSecReturnPersistentRef];
        [publicKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnRef];
        [publicKey setObject:(__bridge id)kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType];
        
        // Now fetch the SecKeyRef version of the key
        SecKeyRef keyRef = nil;
        status = SecItemCopyMatching((__bridge CFDictionaryRef)publicKey, (CFTypeRef *)&keyRef);
        if(status != noErr){
            return nil;
        }
        return keyRef;
    }

在真机上 加密解密 都有几百毫秒的等待时间 有办法优化 ？

放到项目中 每个请求参数都加密解密 真的很耗时

Skipping unpadding

Unpadding is there for a reason. Without unpadding you are not even sure if you're decrypting with the right key.

Do you have any experience creating this kind of crypto related code, and if not, why are you posting it here?

用自己生成的key解密不了

以下是我的key：
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCK6xfyRdsRmM1jkfTFznPlLRg
L46R+PsVjwpucZljLF4Vsjx4Vagfh/Vml8n3c6XdwC+//es1j5ia6jUkMoU8qYsA
H0zEgnMx/RLW3L93dt60kCUN0m9jd+gsSlFSAAprqGm6G2IPETWL7YKWSJuJWVVm
v+pDP7t+ORl0WuK7GQIDAQAB
-----END PUBLIC KEY-----

OSX 支持不能

Hi,

我最近在用 Swift 写一个类似的 RSA Public Key 的 Framework。比较奇怪的是 iOS 没问题，但 OSX 却卡在了 SecItemAdd 上了。

我用你的 Objective-C 代码简单弄了一个 OSX Framework，也是卡在同一个地方。无法通过 SecItemAdd 添加 Public Key，返回错误 -25303。应该是不能在 CFDictionary 里面包含 kSecAttrKeyClassPublic。如果删掉这个函数，Keychain Access 会弄一个 Symmetric Key 在里面，但是肯定是出错了，现在都无法通过 Keychain Access 删掉这个错误的 Key。

网上找了一下，都是关于 iOS 的，没有 OSX 的，你觉得有没有解决办法呢？

感谢！

请问什么时候能支持私钥加密公钥解密啊？

私钥加密不行啊~~~

Decryption of encrypted data not working

Hi, I have an issue with this RSA implementation and any help would be appreciated.
The first issue is that with rsa keys fetched from server(generated on server side), the RSA encryption fails on: ' if (memcmp(&c_key[idx], seqiod, 15)) return(nil);' but if i use they key from Usage section, i get some encrypted data.

What i am missing here?

我用命令行生成的公钥和私钥为什么不能用

公钥和私钥和你的格式一样，但是为什么可以加密 但解密出来的就是nil 啊 ？急问

RSA return -25308 errSecInteractionNotAllowed

Hello, ideawu,

When I use RSA api decryptData:publicKey:, I meet this error code, -25308

But this occurs very few times.

project returnung null values

I downloaded this project and run it, but it's returning empty values in the log:

2017-03-09 13:40:20.992 RSAUtil[1260:44798] Original string(207): hello world! hello world! hello world! hello world! hello world! hello world! hello world! hello world! hello world! hello world! hello world! hello world! hello world! hello world! hello world! hello world!
2017-03-09 13:40:21.007 RSAUtil[1260:44798] Enctypted with public key:
2017-03-09 13:40:21.015 RSAUtil[1260:44798] Decrypted with private key:
2017-03-09 13:40:21.024 RSAUtil[1260:44798] (PHP enc)Decrypted with private key:
2017-03-09 13:40:21.033 RSAUtil[1260:44798] (PHP enc)Decrypted with public key:

Please advise.
Thank you.

并发时，SecItemCopyMatching方法会返回errSecItemNotFound

dispatch_queue_t queue = dispatch_queue_create("test", DISPATCH_QUEUE_CONCURRENT);
for (int i = 0; i< 100; i++) {
dispatch_async(queue, ^{
NSString *test = [[params md5String] uppercaseString];
NSString *test1 = [self p_publicKey];
NSString *test2 = [RSA encryptString:test publicKey:test1];
if (test2.length == 0) {
NSLog(@"出错啦");
NSLog(@"md5===%@", test);
NSLog(@"pubkey===%@", test1);
NSLog(@"encrypted===%@", test2);
} else {
NSLog(@"任务ccc===%@", test2);
}
});
}

会有出现test2为空的情况

Equivalent openssl command

Sorry for my ignorance, but what is the equivalent openssl command for to encrypt a string using this your code?

I have tried openssl rsautl -in test.txt -out output.txt -encrypt -pubin -inkey public.pem

but gets different result from encrypting the same text using this library.

I am trying to verify that what I have encrypted in iOS will be able to decrypt using another library.

Thanks

并发的加解密会导致失败

并发的加解密会导致加密和解密失败

Add Decrypt function

很好用的一个 RSA 第三方库，希望能够加上解密的功能。

Public Key

Hi, I have a key from Java that looks like
OpenSSLRSAPublicKey{modulus=3b11f044.....58df890,publicExponent=10001}

Do I just use the modulus string as the public key or would I need to somehow convert this whole key to another format to use?

Thanks

SecItemAdd status -34018

WHy add KeyChain failed in Iphone device

iphone6 iOS10.1.1 加密失败

iphone6 iOS10.1.1，有时会出现加密失败的情况，错误代码为：SecItemCopyMatching((__bridge CFDictionaryRef)publicKey, (CFTypeRef *)&keyRef); 调用，返回的status 是-25300，
这个问题不是必现，手机放个几个小时，然后第一次build的时候想对比较容易出现，连续build的话后面就很难重现。

How to sign a pdf digitally

Dear all,

I have successfully generated the signature value (pkcs7 data) with swiftRSA. Now i want to embed that signature into pdf can one please tell me how to achive this in ios or share me if you have any demo code.

I am student , working on my sem project...

Thanks & Regards,
Naresh.

在swift上加密后台不能解密

在OC语言中使用公钥加密数据后台解密成功

但是在swift中同样的逻辑后台却解密不了, 而且加密出来的字符数量总是比OC的多很多

调用encryptString("", publicKey: publicKey)同样的一段代码, 为什么在OC与Swift调用 会有这么大区别呢?

从其他程序再进入自己的程序时，RSA加密为空。

程序从运行时始终在前台，加密是没有问题的，但是程序退到后台时，打开微信，QQ等应用进行操作后，再次进入自己的程序后，RSA加密就为空了，这是什么原因呢？

iOS 10 requires Keychain Entitlements

In order to properly encrypt a string with a public key, Keychain Entitlements must be enabled.

BEGIN RSA PUBLIC KEY

-----BEGIN RSA PUBLIC KEY-----
这种格式的公钥如何加密呢？能不能支持一下？

请问那些key是怎么来的。我是新手。

严重的bug

字符串加密都没有问题，现在是我们有一个NSData类型的数据
数据格式是{0x97, 0x0, 0x10}
先用+ (NSData *)encryptData:(NSData *)data publicKey:(NSString *)pubKey加密
接着用+ (NSData *)decryptData:(NSData *)data privateKey:(NSString *)privKey解密
你会发现解密出来的数据只有1字节，也就是说代码中用0x0做了分隔符

Can not decrypt

I created public key and private key by command line like in website https://rietta.com/blog/2012/01/27/openssl-generating-rsa-key-from-command/
It encrypt with public key very good but decWithPrivKey always empty.
Pls help me. Tks

thank u

Android sample

How to decrypt files/text in Android client?

Can not decrypt with PKCS#1.

I tried the demo in the README.md. If the *pubkey and *privkey is PKCS#8 format, it works good. But when I replace the *pubkey and *privkey with PKCS#1 format, the decrypted is empty.

解密不出来

请问demo中的密钥对从哪里来呀？为什么我用openssl生成的pem格式的密钥对在此解密不出来，在终端中使用openssl能解密出来？

在iOS9上加密图片转的data返回nil

demo :
NSData *oridata = UIImagePNGRepresentation([UIImage imageNamed:@"QQ20150805"]);
NSLog(@"oridata with public key: %@", oridata);
NSData *encdata = [RSA encryptData:oridata publicKey:pubkey];
NSLog(@"Enctypted with public key: %@", encdata);
result:Enctypted with public key: null

调试发现进入如下if语句里，不知为何？因为图片数据比较大？
size_t outlen = SecKeyGetBlockSize(keyRef) * sizeof(uint8_t);
if(srclen > outlen - 11){
CFRelease(keyRef);
return nil;
}

js怎么通过公钥解密？

同样的方法，js怎么通过公钥解密怎么做啊？

IOS10 回傳都會nil

IOS10 回傳都會nil,有沒有解決方法?