Hello, I put the two lines but it doesn't work , at all: in fact, it works worth! :-/
Have u tried to do it before suggest it to me? What result did u get? Thanks Mounir IDRASSI wrote: > > Hi, > > What you are seeing is the side-effect of OpenSSL initialization > internals during the first time you access a cryptographic function that > uses random numbers (like ECDSA). > If, in your code, you do two signature in a raw before doing the > verification, you will notice that the first signature is always slower > that the second one and the second signature takes almost the same time > as the verification. > > If you want to remove this side-effect, add the following two lines at > beginning of your program before doing any cryptographic operation : > > BIGNUM *dummy = BN_new(); > BN_rand(dummy, 256, 1, 1); > > After adding these lines, you will see the magic! (the timings will > become more reasonable) > > FYI, the side-effect has to do with the entropy collection of the > OpenSSL random generator. During the first cryptographic operation, most > of the time is consumed by the function RAND_poll. > > Cheers, > -- > Mounir IDRASSI > IDRIX > http://www.idrix.fr > -- View this message in context: http://www.nabble.com/ECDSA_do_verify%28%29-tp26074867p26086514.html Sent from the OpenSSL - Dev mailing list archive at Nabble.com. ______________________________________________________________________ OpenSSL Project http://www.openssl.org Development Mailing List openssl-dev@openssl.org Automated List Manager majord...@openssl.org
