I need the scratch algorithm or code in vb.net for SHA-1 (Secure Hash Algorithm)I know there is a built in Class "SHA1CryptoServiceProvider" and a built in method "sha.ComputeHash()"But can anyone give me the scratch?TIA
I am running into a problem with verifying a SHA256 hash signature generated using OpenSSL.
When I invoke
openssl dgst -sha256 -binary -out hash.sha256 in_file
and I (xxd -g 1 hash.sha256), it looks like this -
00000000: d7 e6 1b 81 5c 32 28 30 7b 7b 45 e1 ef 40 6b 93 00000010: 34 67 d0 a4 ee c0 64 d1 20 e7 c1 c3 a9 f2 a9 a9
Similarly, when I invoke
openssl dgst -sha256 -out hash.sha256 -sign private.pem in_file
to hash and sign all at once, and subsequently verify using
openssl rsautl -in hash.sha256 -out hash.verified -inkey private.pem -verify
and (xxd -g 1 hash.verified), (which should be the same as hash.sha256 from above, I believe) I see
00000000: 30 31 30 0d 06 09 60 86 48 01 65 03 04 02 01 05 00000010: 00 04 20 d7 e6 1b 81 5c 32 28 30 7b 7b 45 e1 ef 00000020: 40 6b 93 34 67 d0 a4 ee c0 64 d1 20 e7 c1 c3 a9 00000030: f2 a9 a9
If you look closely, it appears that hash.verified has 19 bytes of data prepended to it, followed by the correct hash (or at least the same as hash.sha256 from above).
What is it putting in my hash?
My quetion is simple, here's a JSON :
This JSON is received by an App that rejects it if you change the slightest part of it.
This App is probably or obviously able to check the integrity of the JSON thanks to hash at the end : 80db826a05000d6b4ce056483813e722d3ab54e6
Can you find what hash is used ?
I tried MD5 ans SHA1 but i never get back the same hash, maybe i'am doing it wrong ?
I want to use hashed passwords in tomcat-users.xml with BASIC authentication. I added digest="SHA" to realm definition. UserDatabase part is defined as this in $TOMCAT_HOME/conf/server.xml:
<GlobalNamingResources><Resource name="UserDatabase" auth="Container" type="org.apache.catalina.UserDatabase" description="User database that can be updated and saved" factory="org.apache.catalina.users.MemoryUserDatabaseFactory" pathname="conf/tomcat-users.xml" /></GlobalNamingResources>...<Engine>... <Realm className="org.apache.catalina.realm.UserDatabaseRealm" digest="SHA" resourceName="UserDatabase" /> ...</Engine>
But after restart tomcat still treats all defined in $TOMCAT_HOME/conf/tomcat-users.xml passwords as plain-text ones.
<?xml version='1.0' encoding='utf-8'?><tomcat-users><user username="guest" password="e5e9fa1ba31ecd1ae84f75caaa474f3a663f05f4" roles="role1" /></tomcat-users>
I.e. I can login with username/password guest/e5e9fa1ba31ecd1ae84f75caaa474f3a663f05f4, but not with guest/secret as it should be.
Please point me what I'm doing wrong?
An online webhook API I have started using uses HMAC to verify the authenticity of the HTTP POST request.
From my understanding you can only verify the contents of the body of the request if you have the secret key (which was supplied to the service originally).
However, the secret key is included in the JSON data in the body of the request itself.
Is this still reliable? Couldn't a man-in-the-middle read the key, then change the POST contents, recalculate the HASH using the key and change the header as well before forwarding the data? Or am I totally on the wrong track here?