sha256

I'm looking to create a hash with sha256 using openssl and C++. I know there's a similar post at Generate SHA hash in C++ using OpenSSL library , but I'm looking to specifically create sha256. UPDATE: Seems to be a problem with the include paths. It can't find any OpenSSL functions even though I included #include "openssl/sha.h" and I included the paths in my build -I/opt/ssl/include/ -L/opt/ssl/lib/ -lcrypto Adam Lamers Here's how I did it: void sha256_hash_string (unsigned char hash[SHA256_DIGEST_LENGTH], char outputBuffer[65]) { int i = 0; for(i = 0; i < SHA256_DIGEST_LENGTH; i++) { sprintf

The Security services API doesn't appear to allow me to compute a hash directly. There are plenty of public domain and liberally licensed versions available, but I'd rather use a system library implementation if possible. The data is accessible via NSData, or plain pointers. The cryptographic strength of the hash is important to me. SHA-256 is the minimum acceptable hash size. alex-i This is what I'm using for SHA1: #import <CommonCrypto/CommonDigest.h> + (NSData *)sha1:(NSData *)data { unsigned char hash[CC_SHA1_DIGEST_LENGTH]; if ( CC_SHA1([data bytes], [data length], hash) ) { NSData *sha1

I am writing a login for a forum, and need to hash the password client side in javascript before sending it on to the server. I'm having trouble figuring out which SHA-256 implementation I can actually trust. I was expecting there to be some kind of authoritative script that everyone used, but I'm finding loads of different projects all with their own implementations. I realize using other people's crypto is always a leap of faith unless you're qualified to review it yourself, and that there is no universal definition of "trustworthy", but this seems like something common and important enough

I have some string and I want to hash it with the SHA-256 hash function using C#. I want something like this: string hashString = sha256_hash("samplestring"); Is there something built into the framework to do this? Dmitry Bychenko The implementation could be like that public static String sha256_hash(String value) { StringBuilder Sb = new StringBuilder(); using (SHA256 hash = SHA256Managed.Create()) { Encoding enc = Encoding.UTF8; Byte[] result = hash.ComputeHash(enc.GetBytes(value)); foreach (Byte b in result) Sb.Append(b.ToString("x2")); } return Sb.ToString(); } Edit: Linq implementation is

I'm writing a register form for a application but still having problems with being new to c#. I am looking to encrypt/hash passwords to md5 or sha-256, preferably sha-256. Any good examples? I want it to be able to take the information from "string password;" and then hash it and store in the variable "string hPassword;". Any ideas? Don't use a simple hash, or even a salted hash. Use some sort of key-strengthening technique like bcrypt (with a .NET implementation here ) or PBKDF2 (with a built-in implementation ). Here's an example using PBKDF2. To generate a key from your password... string

I want to use sha256 in my project, but I had some troubles rewriting objC code to swift code. Help me please. I used this answer: How can I compute a SHA-2 (ideally SHA 256 or SHA 512) hash in iOS? Here's my code var hash : [CUnsignedChar] CC_SHA256(data.bytes, data.length, hash) var res : NSData = NSData.dataWithBytes(hash, length: CC_SHA256_DIGEST_LENGTH) it gives me error everything because swift cannot convert Int to CC_LONG , for example. You have to convert explicitly between Int and CC_LONG , because Swift does not do implicit conversions, as in (Objective-)C. You also have to define

I'm making a php login, and I'm trying to decide whether to use SHA1 or Md5, or SHA256 which I read about in another stackoverflow article. Are any of them more secure than others? For SHA1/256, do I still use a salt? Also, is this a secure way to store the password as a hash in mysql? function createSalt() { $string = md5(uniqid(rand(), true)); return substr($string, 0, 3); } $salt = createSalt(); $hash = sha1($salt . $hash); Johannes Gorset Neither. You should use bcrypt . The hashes you mention are all optimized to be quick and easy on hardware, and so cracking them share the same qualities

I want to generate a RSA-SHA256 signature in Java, but I can't get it to produce the same signature as with OpenSSL on the console. This is what I did with OpenSSL (following this tutorial ): Generate key pair: openssl genrsa -out private.pem 1024 Extract public key: openssl rsa -in private.pem -out public.pem -outform PEM -pubout Create hash of data: echo 'data to sign' > data.txt openssl dgst -sha256 < data.txt > hash The generated hash file starts with (stdin)= what I removed by hand (first forgot to mention it, thanks mata). Sign hash: openssl rsautl -sign -inkey private.pem -keyform PEM