sha256

问题 I am trying to connect to an API that uses an outdated hmac hash authentication mechanism for the API's. For an instance: $signature = hash_hmac('sha256', $string_to_sign, $api_sec); vs the one generated in Go: h := hmac.New(sha256.New, []byte(authSecret)) h.Write([]byte(stringToSign)) signature := hex.EncodeToString(h.Sum(nil)) When I use the same stringToSign($string_to_sign) and same authSecret($api_sec) the signature generated with Go results as an invalid signature for the API. But if I

问题 I'm trying to better understand the docker history output. When I run docker history nginx:latest I get output that nearly matches the Dockerfile: /bin/sh -c #(nop) CMD ["nginx" "-g" "daemon off;"] /bin/sh -c #(nop) EXPOSE 443/tcp 80/tcp/bin/sh -c ln -sf /dev/stdout /var/log/nginx/access.log && ln -sf /dev/stderr /var/log/nginx/error.log /bin/sh -c apt-key adv --keyserver hkp://pgp.mit.edu:80 --recv-keys 573BFD6B3D8FBC641079A6ABABF5BD827BD9BF62 && echo "deb http://nginx.org/packages/mainline

问题 I am trying to generate a valid SAS token (shared access signatures) to connect to the Azure IoT Hub, but I keep getting the error Connection refused: Not authorized when using the token. I know the way I am connecting is working because when using a SAS token generated with the Microsoft Device Explorer (https://github.com/Azure/azure-iot-sdk-csharp/tree/master/tools/DeviceExplorer) it works as expected. To write the Javascript code I started from this documentation https://docs.microsoft

问题 I need to generate in PHP the same hash as as the PBKDF2WithHmacSHA256 algorithm generates in Java. I did some research and found two functions that seem to be connected to PBKDF2 and HMAC : hash_pbkdf2 - http://php.net/manual/en/function.hash-pbkdf2.php hash_hmac - http://php.net/manual/en/function.hash-hmac.php What PHP functions should I use? Is it even possible with native PHP functions? Edit #1 My Java code, the same result I need achieve in PHP public static byte[] derivateKey(char[]

问题 This has been surprisingly confusing for me. I thought Docker's Image ID is its SHA256 hash. However, apparently the result from docker image ls --digests (listed under the column header DIGEST ) is different from the IMAGE ID of that image. For example docker image ls --digests alpine REPOSITORY TAG DIGEST IMAGE ID CREATED SIZE alpine latest sha256:769fddc7cc2f0a1c35abb2f91432e8beecf83916c421420e6a6da9f8975464b6 055936d39205 2 weeks ago 5.53MB while docker image ls --no-trunc REPOSITORY TAG

问题 This has been surprisingly confusing for me. I thought Docker's Image ID is its SHA256 hash. However, apparently the result from docker image ls --digests (listed under the column header DIGEST ) is different from the IMAGE ID of that image. For example docker image ls --digests alpine REPOSITORY TAG DIGEST IMAGE ID CREATED SIZE alpine latest sha256:769fddc7cc2f0a1c35abb2f91432e8beecf83916c421420e6a6da9f8975464b6 055936d39205 2 weeks ago 5.53MB while docker image ls --no-trunc REPOSITORY TAG

问题 This has been surprisingly confusing for me. I thought Docker's Image ID is its SHA256 hash. However, apparently the result from docker image ls --digests (listed under the column header DIGEST ) is different from the IMAGE ID of that image. For example docker image ls --digests alpine REPOSITORY TAG DIGEST IMAGE ID CREATED SIZE alpine latest sha256:769fddc7cc2f0a1c35abb2f91432e8beecf83916c421420e6a6da9f8975464b6 055936d39205 2 weeks ago 5.53MB while docker image ls --no-trunc REPOSITORY TAG

问题 By using an online tool and wikipedia I found out that every sha-256 encrypted string is 64 chars longs containing numbers and characters. Hence I assumed that there are 34^36 combinations ( 2^216 simplified by an algebra calculator ). After doing some research I found out that most people said there are 2^256 combinations. Could someone explain ? To make the context clear, I write a paper about cryptocurrencies and try to explain how many different combinations there are to encrypt and how

问题 By using an online tool and wikipedia I found out that every sha-256 encrypted string is 64 chars longs containing numbers and characters. Hence I assumed that there are 34^36 combinations ( 2^216 simplified by an algebra calculator ). After doing some research I found out that most people said there are 2^256 combinations. Could someone explain ? To make the context clear, I write a paper about cryptocurrencies and try to explain how many different combinations there are to encrypt and how

问题 By using an online tool and wikipedia I found out that every sha-256 encrypted string is 64 chars longs containing numbers and characters. Hence I assumed that there are 34^36 combinations ( 2^216 simplified by an algebra calculator ). After doing some research I found out that most people said there are 2^256 combinations. Could someone explain ? To make the context clear, I write a paper about cryptocurrencies and try to explain how many different combinations there are to encrypt and how