36 lines
1.1 KiB
Python
36 lines
1.1 KiB
Python
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# file: rsasign.py
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import cyassl
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# start Random Number Generator
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rng = cyassl.GetRng()
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if rng == None:
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print "Couldn't get an RNG"
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exit(-1)
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# load RSA private key in DER format
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key = cyassl.GetRsaPrivateKey("../certs/client-key.der")
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if key == None:
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print "Couldn't load DER private key file"
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exit(-1)
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# Make byte Arrays and fill input
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signOutput = cyassl.byteArray(128) # 128 allows 1024 bit private key
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signStr = cyassl.byteArray(25) # input can't be larger then key size
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# 64 for 512 bit 128 for 1024 bit
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cyassl.FillSignStr(signStr, "Everybody gets Friday off", 25)
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# Do RSA Sign
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signedSize = cyassl.RsaSSL_Sign(signStr, 25, signOutput, 128, key, rng)
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# Show output
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print "Signed Size = ", signedSize, " signed array = ", cyassl.cdata(signOutput, signedSize)
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# let's verify this worked
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signVerify = cyassl.byteArray(signedSize)
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verifySize = cyassl.RsaSSL_Verify(signOutput, signedSize, signVerify, signedSize, key)
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print "Verify Size = ", verifySize, " verify array = ", cyassl.cdata(signVerify, verifySize)
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