sha | 易学教程

Android Studio only gives me SHA1, I need SHA256

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问题 I want to use assetlinks.json for appindexing. I am supposed to use an SHA256 fingerprint, but when I print out the signingReport in Android Studio, I only have SHA1. Can I use SHA1, if not, how can I get an SHA256 signed app? Using Manish Jain's answer I have managed to list only the debug keys, which is more than I could do by myself, but if I put my actual keystore path and jks file in the path, "keytool -list -v -keystore "C:\Users\myself\Keystores\android.jks" -alias mykey -storepass

Does every Android phone support SHA-256

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问题 So reading this post: How can I calculate the SHA-256 hash of a string in Android? and the docs: http://developer.android.com/reference/java/security/MessageDigest.html I'm curious; which phones will support SHA-256? In the docs, the line about the 'NoSuchAlgorithmException' makes me think that some phones don't support all algorithms. Before I go implementing this for an app and expecting it to work the same on all phones I want to know if anyone knows anything about this...? I find it

How to calculate SHA-256 checksum of S3 file content

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问题 S3 out of the box provides the MD5 checksum of the S3 object content. But I need to calculate the SHA-256 checksum of the file content. The file could be large enough so I do not want to load the file in memory and calculate the checksum, instead I need a solution to calculate the checksum without loading the whole file in memory. 回答1: It can be achieved by following steps in Java: Get InputStream of the S3 Object Use MessageDigest and DigestInputStream classes for the SHA-256 hash(or SHA-1

Difference in SHA Hash between git hash-object & git hash-object -t

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问题 I want to calculate git SHA hash without using the git hash object function, that is I want to use the shasum function to calculate it. I know that for the following case body="tree 491e9405120eaaa57cce3938fd38508d85a5e08b parent 8550f0f1a7e32fb1bb0933b0294c116a8dbe6dce author user <me@example.com> 1390718030 +0000 committer user <me@example.com> 1390718030 +0000 This is a test" echo $body | git hash-object -w --stdin #755481b921f13bcfd731d74287a0c5847519ee81 l=`expr ${#body} + 1` echo -e

How SHA and SHA1 certificates secure an API on your Android app like Facebook does?

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问题 I know what is a SHA and SHA1 cryptographic algorithm. I also know how to genarate these from a computer. But I have searched a lot on the internet and still unable to get a proper explanation on how using these keys will secure an API that you are using on an Android app? For example, Facebook needs your SHA1 key from your system along with your app's package name to be entered on their developer console and their API doesn't work on your app if the key you entered is wrong. How does this

SHA512 to generate random numbers in PHP

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问题 I'm filling an array with random numbers using $blockhash[$i] = rand().time().rand() Then, for each random number in that array I calculate the correspondent SHA512 $SecretKey = "60674ccb549f1988439774adb82ff187e63a2dfd403a0dee852e4e4eab75a0b3"; $sha = hash_hmac('sha512', $value, $SecretKey); Split it: $pool = str_split($sha, 2); Then I get the first number from the $pool array, convert hex to dec and limit it within 1 and 50: $dec = hexdec($pool[0]) % 50 + 1; The problem is that the numbers

Jenkins Invalid Git Revisions

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问题 In Jenkins I'm using the XML API to get the SHA(s) of a commit, e.g. http://jenkins/view/job/test/470/api/xml?xpath=//lastBuiltRevision/SHA1&wrapper=SHAS I put it in a wrapper because often it contains more than one SHA and I'm going to process these further. However one of the SHAs always is invalid... <SHAS> <SHA1>cbf26ebac6b4b3860a794c0b1ad86758e7757a3a</SHA1> <SHA1>7e861132ce428911585a818107ba35c44cf12bbf</SHA1> </SHAS> The second SHA is fine but when I check the first SHA here on our GIT

What does “vperm v0,v0,v0,v17” with unused v0 do?

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问题 I'm working on an SHA-256 implementation using Power8 built-ins. The performance is off a bit. I estimate it is off by about 2 cycles per byte (cpb). The C/C++ code to perform SHA on a block looks like so: // Schedule 64-byte message SHA256_SCHEDULE(W, data); uint32x4_p8 a = abcd, e = efgh; uint32x4_p8 b = VectorShiftLeft<4>(a); uint32x4_p8 f = VectorShiftLeft<4>(e); uint32x4_p8 c = VectorShiftLeft<4>(b); uint32x4_p8 g = VectorShiftLeft<4>(f); uint32x4_p8 d = VectorShiftLeft<4>(c); uint32x4

SHA256 digest in perl

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问题 I need to do SHA256 hashing of email addresses and I need the result as a String. I tried the following: use Digest::SHA qw(sha256); my $data = 'swaranga@gmail.com'; my $digest = sha256($data); print $digest; But it prints something like: B/D6i1Î¼û^Þ©Q;¢Þ I need the output as follows: cbc41284e23c8c7ed98f589b6d6ebfd6 The above hash is generated using SHA256 generator of Apache DigestUtils. What am I doing wrong? I am a newbie in perl, so excuse if it is something silly. Thanks. 回答1:

SHA-256 Padding

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To calculate the SHA-256 hash I need to pad my message. Am using the following description: (taken from http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf ) Pad the message in the usual way: Suppose the length of the message M, in bits, is l. Append the bit "1" to the end of the message, and then k zero bits, where k is the smallest non-negative solution to the equation l+1+k 448 mod 512. To this append the 64-bit block which is equal to the number l written in binary But what should one do if the message length in bits is less than 64-bits short of a 512bit block... i.e.,