Initialize RSA object from PEM file









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I have the following method that is able to read in a private key that is in XML format.



private RSAParameters GetPrivateKey(string privateKeyPath)

RSAParameters privateKey;

string readContents;
using (StreamReader streamReader = new StreamReader(privateKeyPath, Encoding.UTF8))

readContents = streamReader.ReadToEnd();


using (var rsa = new RSACryptoServiceProvider(2048))

rsa.FromXmlString(readContents);
privateKey = rsa.ExportParameters(true);


return privateKey;



I want to change that method to us a private key that is in PEM format.



My private key looks like this:



-----BEGIN RSA PRIVATE KEY-----
MIIEpAIBAAKCAQEAuc7/6TDyberFapcC2XfXKXzF2W8IxfgVXigduvE6B0IQBfxD
J1WcWrNriERUsMpKw/2zphxIXHLrsMZ0l5FcxuZBEqtjSskMqOaMKitMfuZBrcaX
e/0W9HUgPEUBNEv35UHtZbInk7K72KEYaTkoxmI8pP/g82lWnGPw1HgjtFWbL9Vx
--8<-----------8<------------8<-----------8<-----------8<-------
SQBBCQKBgQCaOvc8cmtR8vm8HWKJ93qA0OFmUNcW5Rd32q5Zy2FSFfhODnajP7fE
kqOL1+QS4uxd5e35PCkhYVZkAigKt+I+Mx+M14HLyx6gdeU1fXJGh/LltyWM9cra
Rb059rp8d/1c128t7WdCctAcV09PDVbV8T7xVtr7agBLM47LbgL1QQ==
-----END RSA PRIVATE KEY-----


I would think this would be very simple to find on the RSCryptoServiceProvider class documentation:



https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.rsacryptoserviceprovider?redirectedfrom=MSDN&view=netframework-4.7.2



But it is not.



The FromXmlString method is documented as "Initializes an RSA Object from XML", I would expect to a see a similar method with "Initializes an RSA Object from PEM".



[EDIT]



I tried to use this solution:



https://stackoverflow.com/a/32243171/192044



But it gave this error:



enter image description here










share|improve this question























  • I would expect to a see a similar method with "Initializes an RSA Object from PEM". Why? It's an openssl format that's has uneven support across other platforms and languages. The Bouncycastle C# library contains support for it. While parsing DER-encoded ASN.1 objects is pretty horrible in general, yours is one of the simplest around being nothing more than a sequence of DERIntegers. I believe that user @bartonjs wrote an answer here on stackoverflow that contains code to parse it. I don't have the link handy unfortunately.
    – James K Polk
    Nov 10 at 1:27















up vote
0
down vote

favorite












I have the following method that is able to read in a private key that is in XML format.



private RSAParameters GetPrivateKey(string privateKeyPath)

RSAParameters privateKey;

string readContents;
using (StreamReader streamReader = new StreamReader(privateKeyPath, Encoding.UTF8))

readContents = streamReader.ReadToEnd();


using (var rsa = new RSACryptoServiceProvider(2048))

rsa.FromXmlString(readContents);
privateKey = rsa.ExportParameters(true);


return privateKey;



I want to change that method to us a private key that is in PEM format.



My private key looks like this:



-----BEGIN RSA PRIVATE KEY-----
MIIEpAIBAAKCAQEAuc7/6TDyberFapcC2XfXKXzF2W8IxfgVXigduvE6B0IQBfxD
J1WcWrNriERUsMpKw/2zphxIXHLrsMZ0l5FcxuZBEqtjSskMqOaMKitMfuZBrcaX
e/0W9HUgPEUBNEv35UHtZbInk7K72KEYaTkoxmI8pP/g82lWnGPw1HgjtFWbL9Vx
--8<-----------8<------------8<-----------8<-----------8<-------
SQBBCQKBgQCaOvc8cmtR8vm8HWKJ93qA0OFmUNcW5Rd32q5Zy2FSFfhODnajP7fE
kqOL1+QS4uxd5e35PCkhYVZkAigKt+I+Mx+M14HLyx6gdeU1fXJGh/LltyWM9cra
Rb059rp8d/1c128t7WdCctAcV09PDVbV8T7xVtr7agBLM47LbgL1QQ==
-----END RSA PRIVATE KEY-----


I would think this would be very simple to find on the RSCryptoServiceProvider class documentation:



https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.rsacryptoserviceprovider?redirectedfrom=MSDN&view=netframework-4.7.2



But it is not.



The FromXmlString method is documented as "Initializes an RSA Object from XML", I would expect to a see a similar method with "Initializes an RSA Object from PEM".



[EDIT]



I tried to use this solution:



https://stackoverflow.com/a/32243171/192044



But it gave this error:



enter image description here










share|improve this question























  • I would expect to a see a similar method with "Initializes an RSA Object from PEM". Why? It's an openssl format that's has uneven support across other platforms and languages. The Bouncycastle C# library contains support for it. While parsing DER-encoded ASN.1 objects is pretty horrible in general, yours is one of the simplest around being nothing more than a sequence of DERIntegers. I believe that user @bartonjs wrote an answer here on stackoverflow that contains code to parse it. I don't have the link handy unfortunately.
    – James K Polk
    Nov 10 at 1:27













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I have the following method that is able to read in a private key that is in XML format.



private RSAParameters GetPrivateKey(string privateKeyPath)

RSAParameters privateKey;

string readContents;
using (StreamReader streamReader = new StreamReader(privateKeyPath, Encoding.UTF8))

readContents = streamReader.ReadToEnd();


using (var rsa = new RSACryptoServiceProvider(2048))

rsa.FromXmlString(readContents);
privateKey = rsa.ExportParameters(true);


return privateKey;



I want to change that method to us a private key that is in PEM format.



My private key looks like this:



-----BEGIN RSA PRIVATE KEY-----
MIIEpAIBAAKCAQEAuc7/6TDyberFapcC2XfXKXzF2W8IxfgVXigduvE6B0IQBfxD
J1WcWrNriERUsMpKw/2zphxIXHLrsMZ0l5FcxuZBEqtjSskMqOaMKitMfuZBrcaX
e/0W9HUgPEUBNEv35UHtZbInk7K72KEYaTkoxmI8pP/g82lWnGPw1HgjtFWbL9Vx
--8<-----------8<------------8<-----------8<-----------8<-------
SQBBCQKBgQCaOvc8cmtR8vm8HWKJ93qA0OFmUNcW5Rd32q5Zy2FSFfhODnajP7fE
kqOL1+QS4uxd5e35PCkhYVZkAigKt+I+Mx+M14HLyx6gdeU1fXJGh/LltyWM9cra
Rb059rp8d/1c128t7WdCctAcV09PDVbV8T7xVtr7agBLM47LbgL1QQ==
-----END RSA PRIVATE KEY-----


I would think this would be very simple to find on the RSCryptoServiceProvider class documentation:



https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.rsacryptoserviceprovider?redirectedfrom=MSDN&view=netframework-4.7.2



But it is not.



The FromXmlString method is documented as "Initializes an RSA Object from XML", I would expect to a see a similar method with "Initializes an RSA Object from PEM".



[EDIT]



I tried to use this solution:



https://stackoverflow.com/a/32243171/192044



But it gave this error:



enter image description here










share|improve this question















I have the following method that is able to read in a private key that is in XML format.



private RSAParameters GetPrivateKey(string privateKeyPath)

RSAParameters privateKey;

string readContents;
using (StreamReader streamReader = new StreamReader(privateKeyPath, Encoding.UTF8))

readContents = streamReader.ReadToEnd();


using (var rsa = new RSACryptoServiceProvider(2048))

rsa.FromXmlString(readContents);
privateKey = rsa.ExportParameters(true);


return privateKey;



I want to change that method to us a private key that is in PEM format.



My private key looks like this:



-----BEGIN RSA PRIVATE KEY-----
MIIEpAIBAAKCAQEAuc7/6TDyberFapcC2XfXKXzF2W8IxfgVXigduvE6B0IQBfxD
J1WcWrNriERUsMpKw/2zphxIXHLrsMZ0l5FcxuZBEqtjSskMqOaMKitMfuZBrcaX
e/0W9HUgPEUBNEv35UHtZbInk7K72KEYaTkoxmI8pP/g82lWnGPw1HgjtFWbL9Vx
--8<-----------8<------------8<-----------8<-----------8<-------
SQBBCQKBgQCaOvc8cmtR8vm8HWKJ93qA0OFmUNcW5Rd32q5Zy2FSFfhODnajP7fE
kqOL1+QS4uxd5e35PCkhYVZkAigKt+I+Mx+M14HLyx6gdeU1fXJGh/LltyWM9cra
Rb059rp8d/1c128t7WdCctAcV09PDVbV8T7xVtr7agBLM47LbgL1QQ==
-----END RSA PRIVATE KEY-----


I would think this would be very simple to find on the RSCryptoServiceProvider class documentation:



https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.rsacryptoserviceprovider?redirectedfrom=MSDN&view=netframework-4.7.2



But it is not.



The FromXmlString method is documented as "Initializes an RSA Object from XML", I would expect to a see a similar method with "Initializes an RSA Object from PEM".



[EDIT]



I tried to use this solution:



https://stackoverflow.com/a/32243171/192044



But it gave this error:



enter image description here







c# rsa






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 10 at 3:11

























asked Nov 9 at 23:29









Michael Potter

3,71353663




3,71353663











  • I would expect to a see a similar method with "Initializes an RSA Object from PEM". Why? It's an openssl format that's has uneven support across other platforms and languages. The Bouncycastle C# library contains support for it. While parsing DER-encoded ASN.1 objects is pretty horrible in general, yours is one of the simplest around being nothing more than a sequence of DERIntegers. I believe that user @bartonjs wrote an answer here on stackoverflow that contains code to parse it. I don't have the link handy unfortunately.
    – James K Polk
    Nov 10 at 1:27

















  • I would expect to a see a similar method with "Initializes an RSA Object from PEM". Why? It's an openssl format that's has uneven support across other platforms and languages. The Bouncycastle C# library contains support for it. While parsing DER-encoded ASN.1 objects is pretty horrible in general, yours is one of the simplest around being nothing more than a sequence of DERIntegers. I believe that user @bartonjs wrote an answer here on stackoverflow that contains code to parse it. I don't have the link handy unfortunately.
    – James K Polk
    Nov 10 at 1:27
















I would expect to a see a similar method with "Initializes an RSA Object from PEM". Why? It's an openssl format that's has uneven support across other platforms and languages. The Bouncycastle C# library contains support for it. While parsing DER-encoded ASN.1 objects is pretty horrible in general, yours is one of the simplest around being nothing more than a sequence of DERIntegers. I believe that user @bartonjs wrote an answer here on stackoverflow that contains code to parse it. I don't have the link handy unfortunately.
– James K Polk
Nov 10 at 1:27





I would expect to a see a similar method with "Initializes an RSA Object from PEM". Why? It's an openssl format that's has uneven support across other platforms and languages. The Bouncycastle C# library contains support for it. While parsing DER-encoded ASN.1 objects is pretty horrible in general, yours is one of the simplest around being nothing more than a sequence of DERIntegers. I believe that user @bartonjs wrote an answer here on stackoverflow that contains code to parse it. I don't have the link handy unfortunately.
– James K Polk
Nov 10 at 1:27


















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