As title suggests, the property HashAlgorithm does not set "sha256", so that I cannot create a .P7M file.
If I use as algorithm "sha1" or "md5" it works fine, anyone knows why?
The quote from the documentation: HashAlgorithm As String
Selects the hash algorithm used by methods that create hashes. The valid choices are "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320".
asked Sep 17 '14 at 06:33
Make sure to test with the very latest version of Chilkat.
Also, examine the contents of the LastErrorText property after calling CreateP7M (or whichever method you are using to create the .p7m file). Please post the contents of the LastErrorText here, with formatting intact using "pre" tags..
answered Sep 17 '14 at 16:00
ok, thanks very much for your help.
I have the latest version of Chilkat libraries.
This is the error Log I get, when I try to sign a document using a certificate from a smart card.
ChilkatLog: CreateP7M: DllDate: Jul 31 2014 ChilkatVersion: 188.8.131.52 UnlockPrefix: 30-day trial Username: EDITED HERE Personal Info Architecture: Little Endian; 64-bit Language: .NET 4.0 / x64 VerboseLogging: 0 inPath: test.txt outPath: test.p7m createOpaqueSignature: No private key seems to be available for signing (6) Continuing anyway in case it's a hardware CSP... Will use CryptoAPI for signing. Using Crypto API, therefore must load entire file into memory. msCryptoSignature: bDetached: 0 cert_def_provider: Bit4id Universal Middleware Provider hashAlgorithmName: sha1 hashAlgorithmOid: 184.108.40.206.2.26 buildCertChain: startCertDN: EDITED CENSURED personal info here Unable to build certificate chain to root. --buildCertChain signingCert: EDITED CENSURED personal info here pkcs7NumBytes: 1818 This is an opaque signature that includes the signed data. --msCryptoSignature --createOpaqueSignature --CreateP7M --ChilkatLog
This is the code snipper I did:
Chilkat.Csp csp = new Chilkat.Csp(); System.Console.WriteLine(csp.SetProviderMicrosoftRsaAes()); System.Console.WriteLine(csp.ProviderName);
I tried almost all formats (sha256 / SHA-256) but I got the same Chillkat Log.
After calling csp.SetHashAlgorithm("SHA256"), examine the contents of the csp.LastErrorText to see if the hash algorithm is offered by the particular cryptographic service provider.
Note: This problem is specific to the fact that the private key is non-exportable and internally, Chilkat must relegate the signing to the Microsoft Crypto API.
answered Sep 18 '14 at 07:56
the line csp.SetProviderMicrosoftRsaAes(); set up a Rsa/Aes Provider Name thet work only on Windows XP: "Microsoft Enhanced RSA and AES Cryptographic Provider (Prototype)"
use this code line instead: csp.ProviderName = "Microsoft Enhanced RSA and AES Cryptographic Provider"; and it will find the sha256 HashAlgorithm
answered Apr 09 '15 at 10:40