#import "GLQyRsa.h"#import "GLSupprot.h"#import "GLLoginViewController.h"@implementation GLQyRsastatic SecKeyRef _public_key=nil;+ (SecKeyRef) getPublicKeyFile{ // 从公钥证书文件中获取到公钥的SecKeyRef指针    if(_public_key == nil){        //NSData *certificateData = http://www.mamicode.com/[RSA_KEY_BASE64 dataUsingEncoding:NSUTF8StringEncoding];>//        NSString *publicKeyPath = [[NSBundle mainBundle] pathForResource:@"public_key"//                                                                  ofType:@"der"];//        if (publicKeyPath == nil) {//            NSLog(@"Can not find pub.der");//            return nil;//        }        NSString *fielName = [[NSUserDefaults standardUserDefaults]objectForKey:my_publicKeyFileName];        //NSLog(@"fielName:%@",fielName); fileName为.cer证书        if(!fielName)        {            NSLog(@"fielName nil");            return nil;        }        NSDate *certificateData =http://www.mamicode.com/ [NSData dataWithContentsOfFile:fielName];        if (certificateData =http://www.mamicode.com/= nil) {            NSLog(@"Can not read from pub.der");            return nil;        }        SecCertificateRef myCertificate =  SecCertificateCreateWithData(kCFAllocatorDefault, (__bridge CFDataRef)certificateData);        SecPolicyRef myPolicy = SecPolicyCreateBasicX509();        SecTrustRef myTrust;        OSStatus status = SecTrustCreateWithCertificates(myCertificate,myPolicy,&myTrust);        SecTrustResultType trustResult;        if (status == noErr) {            status = SecTrustEvaluate(myTrust, &trustResult);        }        _public_key = SecTrustCopyPublicKey(myTrust);        CFRelease(myCertificate);        CFRelease(myPolicy);        CFRelease(myTrust);    }    return _public_key;}+ (NSData*) rsaEncryptString:(NSString*) string{        SecKeyRef key = [self getPublicKeyFile];    if(!key)    {        NSLog(@"secKeyRefNULL");        return nil;    }        size_t cipherBufferSize = SecKeyGetBlockSize(key);    uint8_t *cipherBuffer = malloc(cipherBufferSize * sizeof(uint8_t));    NSData *stringBytes = [string dataUsingEncoding:NSUTF8StringEncoding];    size_t blockSize = cipherBufferSize - 11;    size_t blockCount = (size_t)ceil([stringBytes length] / (double)blockSize);    NSMutableData *encryptedData =http://www.mamicode.com/ [[NSMutableData alloc] init];    for (int i=0; i<blockCount; i++) {        int bufferSize = MIN(blockSize,[stringBytes length] - i * blockSize);        NSData *buffer = [stringBytes subdataWithRange:NSMakeRange(i * blockSize, bufferSize)];        OSStatus status = SecKeyEncrypt(key, kSecPaddingPKCS1, (const uint8_t *)[buffer bytes],                                        [buffer length], cipherBuffer, &cipherBufferSize);        if (status == noErr){            NSData *encryptedBytes = [[NSData alloc] initWithBytes:(const void *)cipherBuffer length:cipherBufferSize];            [encryptedData appendData:encryptedBytes];                    }else{            if (cipherBuffer) free(cipherBuffer);            return nil;        }    }            if (cipherBuffer) free(cipherBuffer);    //  NSLog(@"Encrypted text (%d bytes): %@", [encryptedData length], [encryptedData description]);    //  NSLog(@"Encrypted text base64: %@", [Base64 encode:encryptedData]);    return encryptedData;}