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OpenSSL and CryptoJS SHA256 encryption conversion

By : user2174578
Date : October 17 2020, 08:10 PM
should help you out It seems that CryptoJS "as-is" does not provide this flexibility. This is because the use of MD5 is hard coded into the function used to derive the key from the passphrase. You can see it happening here in OpenSSLKdf:
code :
var key = EvpKDF.create({ keySize: keySize + ivSize }).compute(password, salt);
        cfg: Base.extend({
            keySize: 128/32,
            hasher: MD5,
            iterations: 1
var key = EvpKDF.create({ keySize: keySize + ivSize, hasher: C_algo.SHA256 }).compute(password, salt);

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CryptoJS and PHP SHA256

By : Waweru Kirumba
Date : March 29 2020, 07:55 AM
seems to work fine The CryptoJS API doesn't provide a way to specify a salt or the number of rounds for SHA256. You could add a salt manually if necessary, and specifying rounds doesn't make sense since "plain" SHA256 always uses a fixed number of rounds (64).
The number of rounds in PHP's crypt() actually defines how often the SHA256 algorithm is applied consecutively, in order to increase the complexity of brute force attacks. The PHP source code comments on this as follows: "Repeatedly run the collected hash value through SHA256 to burn CPU cycles".

How to get the same result with PHP and CryptoJS using SHA256?

By : Matthew
Date : March 29 2020, 07:55 AM
wish helps you I'm trying to decode Firefox Sync data using javascript, porting one php library which does it (https://github.com/mikerowehl/firefox-sync-client-php). The idea is to decode sync data without sending sync key to the server. This is just context, the problem I have is much more specific. , Solved. It was a problem with character codes. Instead of this:
code :
var text = "\x00\x44\xb0\x2c\x0b";
var key = "\xd6\xf8\xb0\x2c\x0b";
hash = CryptoJS.HmacSHA256(text,key);
var text = CryptoJS.enc.Latin1.parse("\x00\x44\xb0\x2c\x0b");
var key = CryptoJS.enc.Latin1.parse("\xd6\xf8\xb0\x2c\x0b");
hash = CryptoJS.HmacSHA256(text,key);

C++ openssl SHA256 running slower than JDK SHA256 implementation

By : user3342769
Date : March 29 2020, 07:55 AM
seems to work fine The bottleneck for your c++ code is your custom bytes_to_string function. Calling stringstream functions in a loop simply hits the performance.
You might want to look at this answer to another question.
code :
static const char characters[] = "0123456789ABCDEF";
std::string result (SHA256_DIGEST_LENGTH * 2, ' ');
for(int i = 0; i < SHA256_DIGEST_LENGTH; i++)
    result[2*i] = characters[(unsigned int) hash[i] >> 4];
    result[2*i+1] = characters[(unsigned int) hash[i] & 0x0F];
return result;

A way to do RSA "encryption" of padded SHA256 hash using command line openssl

By : Imamoto Deputi
Date : March 29 2020, 07:55 AM
Hope this helps The error you get, data too large for modulus, is because you entered the second if of the following code:

C# SHA256 ComputeHash result different with CryptoJS SHA256 function

By : Vikram Kumar
Date : March 29 2020, 07:55 AM
To fix this issue In my example I am using System.Security.Cryptography.SHA256Managed to get SHA256 in C#.
The method SHA256Managed.ComputeHash takes a byte array as a parameter and return another byte array. Now we need to convert back your byte array to a string.
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