[Mono-dev] Data protection failed. ---> System.UnauthorizedAccessException: Access to the path "/usr/share/.mono/keypairs/

nikhil sehgal nikhil.jiet at gmail.com
Sat Oct 7 12:06:29 UTC 2017 

HI All ,

While calling ProtectedData.Protect(Encoding.Unicode.GetBytes("XXXXXXXXXXXXXXX"),
null, DataProtectionScope.LocalMachine);


I am getting following error ....i am running my application under
fast_cgi_mono+nginx and running as non root user..

And following error is coming randomly not always.

I don't want to run my application as root user for Security reasons
.please advice

System.Security.Cryptography.CryptographicException: Data protection
failed. ---> System.UnauthorizedAccessException: Access to the path
"/usr/share/.mono/keypairs/[1][98f3a7e3-0d6e-f432-8a18-e1144b53633f][-1].xml"
is denied.
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode
mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32
bufferSize, System.Boolean anonymous, System.IO.FileOptions options)
[0x001d8] in <77c9551943624fd18301ba6f78a841e5>:0
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode
mode, System.IO.FileAccess access, System.IO.FileShare share) [0x00000] in <
77c9551943624fd18301ba6f78a841e5>:0
  at (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor
(string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare)
  at System.IO.File.Open (System.String path, System.IO.FileMode mode)
[0x00000] in <77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.KeyPairPersistence.Save () [0x00006] in <
77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.RSACryptoServiceProvider.OnKeyGenerated
(System.Object sender, System.EventArgs e) [0x0002f] in <
77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.RSAManaged.GenerateKeyPair () [0x00151] in <
77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.RSAManaged.EncryptValue (System.Byte[] rgb)
[0x0001b] in <77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.PKCS1.RSAEP (System.Security.Cryptography.RSA
rsa, System.Byte[] m) [0x00000] in <77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.PKCS1.Encrypt_OAEP
(System.Security.Cryptography.RSA rsa,
System.Security.Cryptography.HashAlgorithm
hash, System.Security.Cryptography.RandomNumberGenerator rng, System.Byte[]
M) [0x000f6] in <77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.Utils.RsaOaepEncrypt
(System.Security.Cryptography.RSA rsa,
System.Security.Cryptography.HashAlgorithm
hash, System.Security.Cryptography.PKCS1MaskGenerationMethod mgf,
System.Security.Cryptography.RandomNumberGenerator rng, System.Byte[] data)
[0x00000] in <77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.RSAOAEPKeyExchangeFormatter.CreateKeyExchange
(System.Byte[] rgbData) [0x00047] in <77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.RSACryptoServiceProvider.Encrypt
(System.Byte[] rgb, System.Boolean fOAEP) [0x0001f] in <
77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.RSACryptoServiceProvider.Encrypt
(System.Byte[] data, System.Security.Cryptography.RSAEncryptionPadding
padding) [0x00045] in <77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.RSAOAEPKeyExchangeFormatter.CreateKeyExchange
(System.Byte[] rgbData) [0x0002c] in <77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.ManagedProtection.Protect (System.Byte[]
userData, System.Byte[] optionalEntropy,
System.Security.Cryptography.DataProtectionScope
scope) [0x0013e] in <2c890ca2f2c3434ca04011ecd5d57165>:0
  at System.Security.Cryptography.ProtectedData.Protect (System.Byte[]
userData, System.Byte[] optionalEntropy,
System.Security.Cryptography.DataProtectionScope
scope) [0x00023] in <2c890ca2f2c3434ca04011ecd5d57165>:0
   --- End of inner exception stack trace ---
  at System.Security.Cryptography.ProtectedData.Protect (System.Byte[]
userData, System.Byte[] optionalEntropy,
System.Security.Cryptography.DataProtectionScope
scope) [0x0003f] in <2c890ca2f2c3434ca04011ecd5d57165>:0
  at Writelog.Program.Main (System.String[] args) [0x00010] in <
e4a1cce0275a48f29c577f83bf71131e>:0
[ERROR] FATAL UNHANDLED EXCEPTION:
System.Security.Cryptography.CryptographicException:
Data protection failed. ---> System.UnauthorizedAccessException: Access to
the path "/usr/share/.mono/keypairs/[1][98f3a7e3-0d6e-f432-8a18-e1144b53633f][-1].xml"
is denied.
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode
mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32
bufferSize, System.Boolean anonymous, System.IO.FileOptions options)
[0x001d8] in <77c9551943624fd18301ba6f78a841e5>:0
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode
mode, System.IO.FileAccess access, System.IO.FileShare share) [0x00000] in <
77c9551943624fd18301ba6f78a841e5>:0
  at (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor
(string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare)
  at System.IO.File.Open (System.String path, System.IO.FileMode mode)
[0x00000] in <77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.KeyPairPersistence.Save () [0x00006] in <
77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.RSACryptoServiceProvider.OnKeyGenerated
(System.Object sender, System.EventArgs e) [0x0002f] in <
77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.RSAManaged.GenerateKeyPair () [0x00151] in <
77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.RSAManaged.EncryptValue (System.Byte[] rgb)
[0x0001b] in <77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.PKCS1.RSAEP (System.Security.Cryptography.RSA
rsa, System.Byte[] m) [0x00000] in <77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.PKCS1.Encrypt_OAEP
(System.Security.Cryptography.RSA rsa,
System.Security.Cryptography.HashAlgorithm
hash, System.Security.Cryptography.RandomNumberGenerator rng, System.Byte[]
M) [0x000f6] in <77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.Utils.RsaOaepEncrypt
(System.Security.Cryptography.RSA rsa,
System.Security.Cryptography.HashAlgorithm
hash, System.Security.Cryptography.PKCS1MaskGenerationMethod mgf,
System.Security.Cryptography.RandomNumberGenerator rng, System.Byte[] data)
[0x00000] in <77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.RSAOAEPKeyExchangeFormatter.CreateKeyExchange
(System.Byte[] rgbData) [0x00047] in <77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.RSACryptoServiceProvider.Encrypt
(System.Byte[] rgb, System.Boolean fOAEP) [0x0001f] in <
77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.RSACryptoServiceProvider.Encrypt
(System.Byte[] data, System.Security.Cryptography.RSAEncryptionPadding
padding) [0x00045] in <77c9551943624fd18301ba6f78a841e5>:0
  at System.Security.Cryptography.RSAOAEPKeyExchangeFormatter.CreateKeyExchange
(System.Byte[] rgbData) [0x0002c] in <77c9551943624fd18301ba6f78a841e5>:0
  at Mono.Security.Cryptography.ManagedProtection.Protect (System.Byte[]
userData, System.Byte[] optionalEntropy,
System.Security.Cryptography.DataProtectionScope
scope) [0x0013e] in <2c890ca2f2c3434ca04011ecd5d57165>:0
  at System.Security.Cryptography.ProtectedData.Protect (System.Byte[]
userData, System.Byte[] optionalEntropy,
System.Security.Cryptography.DataProtectionScope
scope) [0x00023] in <2c890ca2f2c3434ca04011ecd5d57165>:0
   --- End of inner exception stack trace ---
  at System.Security.Cryptography.ProtectedData.Protect (System.Byte[]
userData, System.Byte[] optionalEntropy,
System.Security.Cryptography.DataProtectionScope
scope) [0x0003f] in <2c890ca2f2c3434ca04011ecd5d57165>:0
  at Writelog.Program.Main (System.String[] args) [0x00010] in <
e4a1cce0275a48f29c577f83bf71131e>:0
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