[英]RSA public key generation — Swift
Azure key vault sends e and n parameters which equals RSA modulus( n ) and RSA public exponent( e ). Azure密钥保险库发送e和n参数,这些参数等于RSA模数( n )和RSA公共指数( e )。 It's easy to create with 3rd party libraries, but output value wouldn't be valid without modulus and exponent.
使用第三方库很容易创建,但没有模数和指数,输出值将无效。
I need to create RSA public key of these two parts.Then I have to create RSA OAEP. 我需要创建这两部分的RSA公钥。然后我必须创建RSA OAEP。 Has anyone encountered a similar problem?
有谁遇到过类似的问题? Any idea how to achieve this?
知道怎么做到这一点?
I have tried to use SCZ-BasicEncodingRules-iOS , but it output incorrect code. 我曾尝试使用SCZ-BasicEncodingRules-iOS ,但输出的代码不正确。
Here is code: 这是代码:
let moduleString: String = "mK-g0TLMqtefmosgBSTQi3dWh8h-rn4lQA8sQgNs_Gkf5TvgKWtYGJ4jRGUU-eK2bmyAAomVUojYBBlRYBkTRekm99DlD9T6U9yI3v11pZVl3yQgVXBEkiTZug3Inn_IAOGPQ3Q5OT6fEj1sRRxmMv93CQukQguSKuU4v2tmElgvyhg_eKIQbNx0JRCI4-1Z5GazxNjtwk7tWcA6PAbV0zZe2AaW0TlYVil_U8NckgHBguBoTHqVAbzb-MNa-HRa4QlBmdemcSaiDr5GikoOdmQ1-Lu6koqUkepx16pgqPvVw3o_NuXAZCS37c7bfgtXWTJcAIjiQaEyRcIV2bXsUQ"
let exponent: String = "AQAB"
let moduleData: NSData! = (moduleString
as NSString).dataUsingEncoding(NSUTF8StringEncoding) as NSData!
let expData: NSData! = (exponent
as NSString).dataUsingEncoding(NSUTF8StringEncoding) as NSData!
let arrayaaa: NSArray = [moduleData, expData]
let key: NSData = arrayaaa.berData()
So, I have found a solution. 所以,我找到了一个解决方案。 Unfortunately SCZ-BasicEncodingRules-iOS has wrong decoding algorithm for iOS 8 and above.
不幸的是, SCZ-BasicEncodingRules-iOS对iOS 8及更高版本的解码算法错误。 It outputs key with incorrect prefix.
它输出带有错误前缀的密钥。
If you faced with the same issue, here is a solution that helped me, but it's Objective-C code. 如果您遇到同样的问题,这里有一个帮助我的解决方案,但它是Objective-C代码。 Original source :
原始来源 :
+ (NSData *)generateRSAPublicKeyWithModulus:(NSData*)modulus exponent:(NSData*)exponent
{
const uint8_t DEFAULT_EXPONENT[] = {0x01, 0x00, 0x01,}; //default: 65537
const uint8_t UNSIGNED_FLAG_FOR_BYTE = 0x81;
const uint8_t UNSIGNED_FLAG_FOR_BYTE2 = 0x82;
const uint8_t UNSIGNED_FLAG_FOR_BIGNUM = 0x00;
const uint8_t SEQUENCE_TAG = 0x30;
const uint8_t INTEGER_TAG = 0x02;
uint8_t* modulusBytes = (uint8_t*)[modulus bytes];
uint8_t* exponentBytes = (uint8_t*)(exponent == nil ? DEFAULT_EXPONENT : [exponent bytes]);
//(1) calculate lengths
//- length of modulus
int lenMod = (int)[modulus length];
if(modulusBytes[0] >= 0x80)
lenMod ++; //place for UNSIGNED_FLAG_FOR_BIGNUM
int lenModHeader = 2 + (lenMod >= 0x80 ? 1 : 0) + (lenMod >= 0x0100 ? 1 : 0);
//- length of exponent
int lenExp = exponent == nil ? sizeof(DEFAULT_EXPONENT) : (int)[exponent length];
int lenExpHeader = 2;
//- length of body
int lenBody = lenModHeader + lenMod + lenExpHeader + lenExp;
//- length of total
int lenTotal = 2 + (lenBody >= 0x80 ? 1 : 0) + (lenBody >= 0x0100 ? 1 : 0) + lenBody;
int index = 0;
uint8_t* byteBuffer = malloc(sizeof(uint8_t) * lenTotal);
memset(byteBuffer, 0x00, sizeof(uint8_t) * lenTotal);
//(2) fill up byte buffer
//- sequence tag
byteBuffer[index ++] = SEQUENCE_TAG;
//- total length
if(lenBody >= 0x80)
byteBuffer[index ++] = (lenBody >= 0x0100 ? UNSIGNED_FLAG_FOR_BYTE2 : UNSIGNED_FLAG_FOR_BYTE);
if(lenBody >= 0x0100)
{
byteBuffer[index ++] = (uint8_t)(lenBody / 0x0100);
byteBuffer[index ++] = lenBody % 0x0100;
}
else
byteBuffer[index ++] = lenBody;
//- integer tag
byteBuffer[index ++] = INTEGER_TAG;
//- modulus length
if(lenMod >= 0x80)
byteBuffer[index ++] = (lenMod >= 0x0100 ? UNSIGNED_FLAG_FOR_BYTE2 : UNSIGNED_FLAG_FOR_BYTE);
if(lenMod >= 0x0100)
{
byteBuffer[index ++] = (int)(lenMod / 0x0100);
byteBuffer[index ++] = lenMod % 0x0100;
}
else
byteBuffer[index ++] = lenMod;
//- modulus value
if(modulusBytes[0] >= 0x80)
byteBuffer[index ++] = UNSIGNED_FLAG_FOR_BIGNUM;
memcpy(byteBuffer + index, modulusBytes, sizeof(uint8_t) * [modulus length]);
index += [modulus length];
//- exponent length
byteBuffer[index ++] = INTEGER_TAG;
byteBuffer[index ++] = lenExp;
//- exponent value
memcpy(byteBuffer + index, exponentBytes, sizeof(uint8_t) * lenExp);
index += lenExp;
if(index != lenTotal)
NSLog(@"lengths mismatch: index = %d, lenTotal = %d", index, lenTotal);
NSMutableData* buffer = [NSMutableData dataWithBytes:byteBuffer length:lenTotal];
free(byteBuffer);
return buffer;
}
This algorithm matches with standard Java KeyFactory generation class. 此算法与标准Java KeyFactory生成类匹配。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.