2009/10/14 Reid Thompson :
> On Tue, 2009-10-13 at 08:58 +0800, jaze lee wrote:
>> hello guys,
>> recently i use openssl to implement a identify scheme, i need the
>> hash function. But the sha1 can not meet my needs，
>> the message digest i want are 200 bits or
jaze-lee
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e note is " Add polynomials a and b and store result in r; r could
be a or b, a and b could be equeal;
r is the bitwise XOR of a and b ."
i want to know when the r is the xor of a and b.
>
> Cheers,
> --
> Mounir IDRASSI
> IDRIX
> http://www.idrix.fr
>
> jaze lee wro
2009/9/14 jaze lee :
> 2009/9/14 Mounir IDRASSI :
>> Hi,
>>
>> There is no explicit function for this but you can use the function
>> BN_GF2m_add to perform the XOR of two BIGNUMs : for GF2m polynomials,
>> the addition is a simple bitwise XOR.
> Thank you
list
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I want to implement xor function of large number . I do not know
whether the similar function is already been implemented. If so, where
i can find it . And if not i have to try , thank you !
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OpenSSL Project
hello,
I find the structure of EC_GROUP, and there is a variable i
don't understand. it is the variable order, what 's the role of the
order . who knows ?
Thank u.
struct ec_group_st {
36 const EC_METHOD *meth;
37 EC_POINT *generator
hello,
when i traced ecdsa_do_sign, i can not find the definition of
ECDSA_SIG_new(), anyone know where it is ? thank you
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hello,
If i want to use elliptic curve encryption algorithm, i have to
express my data into the point in the curve, Is there some good
methods
do this job well ?
Thank u.
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OpenSSL Project ht
Hello,
Is there a function to implement the ecc encryption ? not ecc
signature. Thank you .
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hello,
how we change the data we want to encode to the point in the
ecliptic ? thank you
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2009/6/7 Victor Duchovni :
> On Sun, Jun 07, 2009 at 09:51:14AM +0800, jaze lee wrote:
>
>> The problem is we can not find the function yet ? or some other ways
>> to judge a big integer whether it's a prime. Is it so-called
>> mathematics problem that many cipher b
2009/6/6 Michael S. Zick :
> On Sat June 6 2009, jaze lee wrote:
>>
>> i still not understand the problem. although i don''t get the result.
>>
>
> Q1: Why is this problem "hard" - as in: "computationally hard" ?
>
> A1
2009/6/6 Rustam Rakhimov :
> So if you are so brave try the example given before.
> Than you will feel reality.
may be you are wright, i try , but i can not get the result.
if a integer with m bits and another integer with n bits, if the
multiple , there product has m+n bits or m+n-1 bits.
2489114
2009/6/6 David Schwartz :
>
>> hello,
>> when i read some books about cryptography, it always go that the
>> cryptography is based on the difficult math problem, for example big
>> integer decomposition,
>> i don't understand it, for if we know that n = p*q , p, q are prime ,
>> why it's diff
hello,
when i read some books about cryptography, it always go that the
cryptography is based on the difficult math problem, for example big
integer decomposition,
i don't understand it, for if we know that n = p*q , p, q are prime ,
why it's difficult to get p and q ? i think ,if we know the
hello,
#include
2 int main() {
3 BIO * b;
4char buf[100] = "hello world \n";
5 b = BIO_new(BIO_s_file());
6 BIO_set_fp(b, stdout, BIO_NOCLOSE);
7 BIO_write(b, buf, sizeof(buf));
8 return 0;
9 }
after compile , and run, i can see the hello world
but if
hello,
If there is a large file, I want to use BIO_read to read it
to buff[4096] in a loop, but i found it start from the second loop,
BIO_read from the file begining. I use BIO_seek to solve it.
But it not work. Is there any good suggestion ? Thank you
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