digest

问题 i have developed a web application where a user can select multiple files via a input field. Then the sha-256 checksums are calculated by the following code. The code (taken from developer.mozilla.org) only works for small files. What do I have to change to handle large files (e.g. 1GB+) too? function sha256(buffer){ return crypto.subtle.digest("SHA-256", buffer).then(function (hash) { return hex(hash); }); } function hex(buffer) { var hexCodes = []; var view = new DataView(buffer); for (var

问题 I need to add a fingerprint to each row in a dataset so to check with a later version of the same set to look for difference. I know how to add hash for each row in R like below: data.frame(iris,hash=apply(iris,1,digest)) I am learning to use dplyr as the dataset is getting huge and I need to store them in SQL Server, I tried something like below but the hash is not working, all rows give the same hash: iris %>% rowwise() %>% mutate(hash=digest(.)) Any clue for row-wise hashing using dplyr?

问题 I have to write some code with Node.JS for an API documentation, but I tried the last few days all the solutions I could found on the web (including Stack of course) without succes... My API use HTTP Digest Auth and that's the problem, I was able to connect, that's was not a big deal but everytime I got the same return : Got response : 401 HTTP Digest Authentication required for "api.example.com" You can show my base code below without auth! Because I don't know what I can do after all the

来源： https://stackoverflow.com/questions/9986971/converting-a-hexadecimal-digest-to-base64-in-ruby

来源： https://stackoverflow.com/questions/9986971/converting-a-hexadecimal-digest-to-base64-in-ruby

问题 I'm using xades4j to crate a XAdES-T enveloped signature for an XML file. When I'm verifying the signed XML I get an error saying "Digest value computed does not match the digest value within the ds:Reference" where the reference points to the element of Type="http://uri.etsi.org/01903#SignedProperties". The digest value of the root XML element itself is OK. Has anybody faced with such a problem? The only thing I could detect is that the signing time is not in the Zulu format but looks like

问题 I recently started studying about digest and performance improvements in AngulaJs and found on my website that I'm using tons of ng-if . Sometimes in ng-if there is a variable that may change, but often is fixed at the startup of the controller and then never changes. What should I do so to improve performance avoiding digest to evaluate every loop those unchangeable ng-if ? Should I change directive? With what? E.g In my header template I have a div that can be seen only by particular type

问题 I can't make MessageDigest work, the program gives me two error: UnsupportedEncodingException, NoSuchAlgorithmException byte[] bytesOfchat_key = "lol".getBytes("UTF-8"); MessageDigest md = MessageDigest.getInstance("MD5"); byte[] Digest = md.digest(bytesOfchat_key); If I throw the errors, it give me ﾜ￟ﾴ9ￇﾇnp>0xd￉z as response ( 16 chars ) PS: I have used to print the Digest for (byte b : Digest) { System.out.print((char)b); } 回答1: md5 returns hexadecimal numbers, so for decoding it to a

问题 I can't make MessageDigest work, the program gives me two error: UnsupportedEncodingException, NoSuchAlgorithmException byte[] bytesOfchat_key = "lol".getBytes("UTF-8"); MessageDigest md = MessageDigest.getInstance("MD5"); byte[] Digest = md.digest(bytesOfchat_key); If I throw the errors, it give me ﾜ￟ﾴ9ￇﾇnp>0xd￉z as response ( 16 chars ) PS: I have used to print the Digest for (byte b : Digest) { System.out.print((char)b); } 回答1: md5 returns hexadecimal numbers, so for decoding it to a

问题 I have a quick question about calculating the digest of a PDF document to use for a digital signature (somewhat related to one of my earlier questions, I'm trying to figure out why you would need to know a client's certificate to create the correct digest). In Adobe's documentation about the PDF format the following is specified: A byte range digest shall be computed over a range of bytes in the file, that shall be indicated by the ByteRange entry in the signature dictionary. This range