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(Chilkat2-Python) 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 chilkat2 # This example requires the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. pkey = chilkat2.PrivateKey() # 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. fac = chilkat2.FileAccess() # inData is a memoryview inData = fac.ReadEntireFile("in.dat") rsa = chilkat2.Rsa() # 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.LittleEndian = False # sigBytes is a memoryview sigBytes = rsa.SignBytes(inData,"sha256") if (rsa.LastMethodSuccess != True): print(rsa.LastErrorText) sys.exit() # Save the binary signature to a file. success = fac.WriteEntireFile("signature.sig",sigBytes) if (success != True): print(fac.LastErrorText) sys.exit() print("Success.") |
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