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Questions tagged [sha2]

sha-2 refers to the family of secure hash functions consisting of SHA-224, SHA-256, SHA-384, and SHA-512. These are defined by the US NIST in FIPS 180-4.

sha-2 refers to the family of secure hash functions consisting of SHA-224, SHA-256, SHA-384, and SHA-512. These are defined by the US NIST in FIPS 180-4.

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Objective-C SHA2 hash not working correctly with non-ASCII

I am using xcode and this is my sha512 method: -(NSString*) sha512:(NSString*)input { const char *cstr = [input cStringUsingEncoding:NSUTF8StringEncoding]; NSData *data = [NSData dataWithBytes:cstr length:input.length]; uint8_t…
evanwong
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What's the state of support for SHA-2 in various platforms?

I read that SHA-1 is being retired from the FIPS 180-2 standard. Apparently there are weaknesses in SHA-1 that led to this decision. Can anyone elaborate on the basis for that decision? Are there implications for the use of SHA-1 in commercial…
Cheeso
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Does SHA-2 Hashing use a key?

From personal knowledge I know SHA-2 hashes are irreversible and do not use a key. But a person I know has contradicted the above very confidently, I'm now confused and couldn't find the answer I wanted by googling. Can anyone clear me up on this…
Marco
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Space & Time Complexity of SHA-2

I am wondering what the space and time complexity of SHA-2 is. I tried looking around, didn't really get a straight forward answer. Can anyone help me out? Thanks very much!
vs9999
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SHA256 not working even after hotfixes

Ok, so we have a Windows Server 2003 machine with SP2 and both HOTFIX KB 938397 and KB 968730 installed. When we try to use the SHA2 certificates (SHA256) The following things still happen: • Such a certificate can be imported in the certificate…
Jon Koeter
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Compute blob hash in trigger on blob's table

My environment is Oracle 11g. I have a table T_IMG whose columns are an image blob, an image identifier, and the image's hash computed as SHA256. I want the image hash to be computed and inserted into the T_IMG table every time a row is inserted or…
adim
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Is there an open source alternative to signtool from Microsoft to sign exes with sha2?

We need to sign Windows software with sha2 algorithm but installing signtool seems to be a problem, since I am having difficulties to install the software on my machines. Moreover, I would like to sign the exes on linux. We used to perform the task…
user1102074
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What is the difference between “SHA-2” and “SHA-256”

I'm a bit confused on the difference between SHA-2 and SHA-256 and often hear them used interchangeably. I think SHA-2 a "family" of hash algorithms and SHA-256 a specific algorithm in that family. Can anyone clear up the confusion.
Usman Khawaja
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Site uses SHA-2 but Chrome still warns about weak SHA-1

I have multiple sites secured with SSL. All is from the same provider. At one domain Chrome says: This site uses a weak security configuration (SHA-1 signatures), so your connection may not be private. I tested the domain with ssllabs.com and I…
Tamas Toth
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Storing PBKDF2 Settings Alongside Password

I'm experimenting with PBKDF2 for my passwords right now, and it dawned on me that if I were to ever upgrade to a faster machine in the future, I would want to increase the number of PBKDF2 iterations. However, this would invalidate all the current…
Huy T
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MySQL SHA2 function does not appear to work

I'm using MySql 5.5.32 and trying to reproduce some code in a stored procedure that we have in the business layer so I can set passwords for people using sql. It appears that there is something wrong with the SHA2 function though, but maybe I'm…
bpeikes
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Cannot get Tomcat JDBCRealm to use SHA2

I am using Tomcat 7 / JDBCRealm authentication in clear text (development/controlled environment). Now I want to upload the web app to my hosted environment so I need to digest the passwords. I added 'digest="MD5"' to the realm section in…
adaj21
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Is truncating sha2/sha3 to 16 bytes worse than using crc32 which itself gives 16 bytes to begin with?

I am using AES128 in CBC mode, and I need a 16-byte key, so I was wondering if using sha2 or sha3 and then truncating it to 16 bytes (take first 16 bytes from the left) would make sha2/sha3 weaker than crc32 which gives me 16 bytes out of the box.
NS studios
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How to convert a hex decimal column in scala to int

I tried to use conv function as I saw in some examples, but is not working for me. I don't understand why this function returns the same value in the column of my DF. I was using spark2.1 with scala 2.11.11, and then I tried with spark 2.2 and scala…
Estela Balboa
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Difference between android sha224 and python sha224

For an application prototype I'm creating a simple user login. The Password of the user will then be hashed using sha224 and transferred to the back-end. The Problem I am facing right now is the following. The password that was stored in the DB…
philgiese
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