signer | 易学教程

How to speedup jar signer?

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问题 I use ant for sign my jars for web-start deployment. Ant.signjar is very slow when web-start signing. How to speedup signing process ? 回答1: I found one possible solution. Earlier in build script ant.signjar called sequentially for all jars (We use gradle for build, more than 20 MB dependecies). Now i use groovy library GPars methods: withPool(4) and eachParallel { ant.signjar }. It is cool for 2 cores in my pc and 4 cores in build server. (for 3 times faster) Second trick is cache: we use

Creation of ECDSA private key given curve and private exponent?

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问题 I am new to cryptopp and have been struggling for a while with the creation of private keys for ECDSA signing. I have a hex encoded private exponent E4A6CFB431471CFCAE491FD566D19C87082CF9FA7722D7FA24B2B3F5669DBEFB . This is stored as a string. I want to use this to sign a text block using ECDSA. My code looks a bit like this string Sig::genSignature(const string& privKeyIn, const string& messageIn) { AutoSeededRandomPool prng; ECDSA<ECP, SHA256>::PrivateKey privateKey; privateKey

Creation of ECDSA private key given curve and private exponent?

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I am new to cryptopp and have been struggling for a while with the creation of private keys for ECDSA signing. I have a hex encoded private exponent E4A6CFB431471CFCAE491FD566D19C87082CF9FA7722D7FA24B2B3F5669DBEFB . This is stored as a string. I want to use this to sign a text block using ECDSA. My code looks a bit like this string Sig::genSignature(const string& privKeyIn, const string& messageIn) { AutoSeededRandomPool prng; ECDSA<ECP, SHA256>::PrivateKey privateKey; privateKey.AccessGroupParameters().Initialize(ASN1::secp256r1()); privateKey.Load(StringSource(privKeyIn, true, NULL).Ref());