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(CkPython) Duplicate openssl dgst -sha256 -sign private.pem -out sha256.sig in.datDemonstrates how to duplicate this OpenSSL command: openssl dgst -sha256 -sign private.pem -out sha256.sig in.datThe in.dat file can contain text or binary data of any type. The OpenSSL command does the following:
import sys import chilkat # This example requires the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. pkey = chilkat.CkPrivateKey() # Load the private key from an PEM file: success = pkey.LoadPemFile("private.pem") if (success != True): print(pkey.lastErrorText()) sys.exit() # Load the file to be signed. inData = chilkat.CkByteData() success = inData.loadFile("in.dat") if (success != True): print("Failed to load input data.") sys.exit() rsa = chilkat.CkRsa() # Import the private key into the RSA component: success = rsa.ImportPrivateKeyObj(pkey) if (success != True): print(rsa.lastErrorText()) sys.exit() # OpenSSL uses big-endian... rsa.put_LittleEndian(False) sigData = chilkat.CkByteData() success = rsa.SignBytes(inData,"sha256",sigData) if (success != True): print(rsa.lastErrorText()) sys.exit() # Save the binary signature to a file. success = sigData.saveFile("signature.sig") if (success != True): print("Failed to save signature file.") sys.exit() print("Success.") |
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