sha1 | 易学教程

The new subject hash openssl algorithm differs

阅读更多关于 The new subject hash openssl algorithm differs

问题 I am running into an issue when managing openssl certificates from Java Framework. openssl x509 -subject_hash ... output differs to the one that Java framework returns when calling X509_NAME_hash() , see below. The reason for this is that openssl changed the way it calculates the SHA1. Now, instead of basing the hash in the ASN.1 DER representation of the subject, as it does for MD5, it first calculates the CANONICAL representation and then based on that, it calculates the ASN.1 DER, and then

Easy way to compile, sign, zipalign APK for Android Play Store (Also SHA1 Key Viewer)

阅读更多关于 Easy way to compile, sign, zipalign APK for Android Play Store (Also SHA1 Key Viewer)

问题 How do you easily compile and deploy your APK packages to the Google Play Store? i have been searching around for the easiest way i could find for my setup and ended up doing the following below? Would you suggest a better way for this? "Can you sign and zip align your APK file from within Android Studio using a GUI, not by using the terminal?" Two Batch Files to assist with your deployment process The following batch file i created to speed up the testing of my APK files across various

Different SHA1 Hash result between Java and C#

阅读更多关于 Different SHA1 Hash result between Java and C#

问题 I've a big problem. I using this C# function to encode my message: byte[] buffer = Encoding.ASCII.GetBytes(file_or_text); SHA1CryptoServiceProvider cryptoTransformSHA1 = new SHA1CryptoServiceProvider(); String hashText = BitConverter.ToString(cryptoTransformSHA1.ComputeHash(buffer)).Replace("-", ""); On java side, I use this snippet: MessageDigest md = MessageDigest.getInstance("SHA-1"); byte[] sha1hash = new byte[40]; md.update(text.getBytes("iso-8859-1"), 0, text.length()); sha1hash = md

failed to verify a dsawithSha1 signed message against a DSA public key in python/m2crypto

阅读更多关于 failed to verify a dsawithSha1 signed message against a DSA public key in python/m2crypto

问题 - I'm trying to verify a signed message using a x509 certificate holding a dsa public key. The x509 certificate was provided by an SAP System in PKCS7 encoding and after converting in PEM with openssl I'm able to read the contents (openssl x509 -in sapcert.pem -inform pem -text) It holds a public key in dsaEncryption, showing me the DSA parameters y(pub), p, q and g. Because I did not found a DSA implementation in M2Crypto x509 class, i tried to build the DSA public key by myself. Therefor I

Sha-1 hash fixed point

阅读更多关于 Sha-1 hash fixed point

问题 how hard is it to find x where sha1(x) = x? where x is the form of 'c999303647068a6abaca25717850c26c9cd0d89c' i think the fact that there are sha1 collisions make this possible, but, how easy (or hard) is it to find an example? 回答1: Read Cryptanalysis of SHA-1 on Wikipedia. There's more information than you need on that article and its references combined. Edit: how hard is it to find x where sha1(x) = x? Such an attack is known as a preimage attack and finding such an x is usually much

Is Perl Data::UUID a strong symmetric key source?

阅读更多关于 Is Perl Data::UUID a strong symmetric key source?

问题 I'm considering using Data::UUID Perl module to generate a 256 bit symmetric key for use with the HMAC_SHA256 algorithm. Each call should give me a unique string of 128 bits so I'm thinking of doing something like the following: use Data::UUID; my $ug = new Data::UUID; my $uuid1 = $ug->to_hexstring($ug->create()); my $uuid2 = $ug->to_hexstring($ug->create()); my $256_bit_key = $uuid1 . $uuid2; Is this key cryptographically strong? 回答1: No. Use Crypt::OpenSSL::Random or another crypto-strong

SHA1 for google map release key is showing some encrypted text

阅读更多关于 SHA1 for google map release key is showing some encrypted text

问题 I was working with google map. In debug mode, it was fantastic. For release mode I tried to get the release SHA1 key from my windows10 hp probook. But i got some encrypted text instead of SHA1. My command is as follows: C:\Program Files\Java\jdk1.8.0_45\bin>keytool -exportcert -alias razon** -keystore E:\keystore\keystore.jks The output was as follows along with some unknown signs that are unable to write here: 0S10 U8810dhaka10Udhaka10U 410608143654Z0S10 U8810dhaka10Udhaka10U Then I created

Git hash-object is yielding different SHA1 in Powershell, CMD and Bash?

阅读更多关于 Git hash-object is yielding different SHA1 in Powershell, CMD and Bash?

问题 I thought SHA1 value would be same regardless of the platform. And I encountered this today and I hope I can get some clarification here. My test string is: 'Apple Pie' In Bash: echo 'Apple Pie' | git hash-object --stdin 23991897e13e47ed0adb91a0082c31c82fe0cbe5 In CMD (Windows 10): echo 'Apple Pie' | git hash-object --stdin f554ff1fdde0e3c2ca9f67849791456302b5c12b In Powershell 5.0 (Windows 10): echo 'Apple Pie' | git hash-object --stdin 157cb7be4778a9cfad23b6fb514e364522167053 I am now

Git hash-object is yielding different SHA1 in Powershell, CMD and Bash?

阅读更多关于 Git hash-object is yielding different SHA1 in Powershell, CMD and Bash?

hmac_sha1 c++例子

阅读更多关于 hmac_sha1 c++例子

最近游戏后台接入腾讯敏感词接口： /v3/user/uic_filter 需要加密方式是hmac_sha1，项目中没有，于是从网上找了库，最后上线应用。说下具体流程和注意的坑：关键的函数：HMAC_SHA1 注意的点：mars_https::BYTE digest[20]; 这里数组一定要是20 最终要经过另一个函数调用洗礼：byteToHexStr 以下是测试代码和库函数。 1 #include <iostream> 2 #include <math.h> 3 #include "HmacSha1.h" 4 #include <string> 5 using namespace std; 6 7 string byteToHexStr(unsigned char byte_arr[], int arr_len) 8 { 9 string hexstr; 10 for (int i=0;i<arr_len;i++) 11 { 12 char hex1; 13 char hex2; 14 int value=byte_arr[i]; 15 int v1=value/16; 16 int v2=value % 16; 17 18 //将商转成字母 19 if (v1>=0&&v1<=9) 20 hex1=(char)(48+v1); 21 else 22 hex1=(char)(55