生成從模公鑰和指數

-6

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和指數

請幫我生成使用係數和指數使用客觀-C公鑰。

來源

2016-11-15 Manjunath

的BIGNUM結構和加密我認爲這是一個重複http://stackoverflow.com/q/29669858/3484009 – Sunder

您可以在我的答案評論中回答我的問題，或者告訴您是否找到另一個解決方案？ – Sunder

對問題進行獎勵並不授予您發佈質量很低的「爲我做」類型問題的權利。請編輯你的問題。 –

正如this answer寫zaph，下面的代碼應該做你想要什麼：

NSData* bytesFromHexString(NSString * aString) { 
    NSString *theString = [[aString componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] componentsJoinedByString:nil]; 

    NSMutableData* data = [NSMutableData data]; 
    int idx; 
    for (idx = 0; idx+2 <= theString.length; idx+=2) { 
     NSRange range = NSMakeRange(idx, 2); 
     NSString* hexStr = [theString substringWithRange:range]; 
     NSScanner* scanner = [NSScanner scannerWithString:hexStr]; 
     unsigned int intValue; 
     if ([scanner scanHexInt:&intValue]) 
      [data appendBytes:&intValue length:1]; 
    } 
    return data; 
} 

NSString *modulusString = @"..."; 
NSString *exponentString = @"65537"; 

NSData *pubKeyModData = bytesFromHexString(modulusString); 
NSData *pubKeyExpData = bytesFromHexString(exponentString); 
NSArray *keyArray = @[pubKeyModData, pubKeyExpData]; 

//Given that you are using SCZ-BasicEncodingRules-iOS: 
NSData *berData = [keyArray berData]; 
NSLog(@"berData:\n%@", berData); 

NSString *berBase64 = [berData base64EncodedStringWithOptions:0]; 
NSString *preamble = @"-----BEGIN CERTIFICATE REQUEST-----"; 
NSString *postamble = @"-----END CERTIFICATE REQUEST-----"; 
NSString *pem = [NSString stringWithFormat:@"%@\n%@\n%@", preamble, berBase64, postamble]; 
NSLog(@"pem:\n%@", pem);

來源

2016-11-17 11:12:29 Sunder

我試過這個，但生成的公鑰沒有加密數據。 – Manjunath

它實際上是生成一個pem文件的內容。你能證明你是如何加密數據的？ – Sunder

iOS不提供生成公鑰的機制，因爲我們從java或android中獲取該公鑰是非常具體的。通過添加一個API並將mod和exp發送到服務器並將公鑰返回來解決問題。感謝幫助 – Manjunath

要做到這一點請確保您已經OpenSSL庫鏈接（這裏http://code.google.com/p/ios-static-libraries/指令）

一旦鏈接你將可以訪問多個BIGNUM轉換器。我把模數爲十六進制使用BN_hex2bn方法節省了十六進制字符串爲「指數」

然後創建一個使用RSA_public_encrypt

RSA *rsa = NULL; 
rsa->n = BN_new(); 
BN_copy(rsa->n,modulus); 
rsa->e = BN_new(); 
BN_copy(rsa->e,exponent);  
rsa->iqmp=NULL; 
rsa->d=NULL; 
rsa->p=NULL; 
rsa->q=NULL;

來源

2016-11-22 00:52:49 PureText

生成從模公鑰和指數

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