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