sha1

问题 According to my requirement: The input string has to be converted into Byte Values. Each character of string , which are 16 bit values , has to be converted to low 8 bits. The Sha1 is then computed over the byte Array. The resulting SHA-1 is converted into a 40 character string. I know how to convert a string into SHA1 , but the rest of part is a bit gloomy to me. I have been able to do the last two steps. unsigned char digest[CC_SHA1_DIGEST_LENGTH]; NSData *dataString = [yourString

问题 I work with cellphones and deal with MEID numbers on a daily basis. So instead of searching online for a MEID (a hex number of length 14) to pseudo ESN (a hex number of length 8) calculator, I figured I can make my own program. The way to obtain a pESN from MEID is fairly simple in theory. For example, given MEID 0xA0000000002329, to make a pESN, SHA-1 needs to be applied to the MEID. SHA-1 on A0000000002329 gives e3be267a2cd5c861f3c7ea4224df829a3551f1ab. Take the last 6 hex numbers of this

问题 As there have been significant advances in the cryptoanalysis of SHA1 it's supposed to be phased out in favor of SHA2 (wikipedia). For use as underlying hash function in PBKDF2, however, it's basically used as a PRNG. As such it should be still secure to use SHA1 as hash for PBKDF2, right? 回答1: None of the currently known weaknesses on SHA-1 has any impact on its security when used in HMAC, a fortiori when used in PBKDF2. For that matter, MD5 would be fine too (but not MD4). However, SHA-1 is

问题 As there have been significant advances in the cryptoanalysis of SHA1 it's supposed to be phased out in favor of SHA2 (wikipedia). For use as underlying hash function in PBKDF2, however, it's basically used as a PRNG. As such it should be still secure to use SHA1 as hash for PBKDF2, right? 回答1: None of the currently known weaknesses on SHA-1 has any impact on its security when used in HMAC, a fortiori when used in PBKDF2. For that matter, MD5 would be fine too (but not MD4). However, SHA-1 is

问题 I'm trying to replicate some C# code in PHP5 and am having some difficulties. The C# code is as following, and it is important to note that it cannot be changed: string s = strToHash; UnicodeEncoding encoding = new UnicodeEncoding(); byte[] bytes = encoding.GetBytes(s); SHA1Managed managed = new SHA1Managed(); bytes = encoding.GetBytes(Convert.ToBase64String(managed.ComputeHash(bytes)) + "Space"); return Convert.ToBase64String(managed.ComputeHash(bytes)); The PHP code I've written to

问题 Make SHA1 hash from string '12345' with as3crypto in as3 the same way how it is done in there example: var sha1:SHA1 = new SHA1; var src:ByteArray = Hex.toArray("12345"); var digest:ByteArray = sha1.hash(src); trace('SHA:' + Hex.fromArray(digest)); result : ec60c0fd70d82a7785f6c9a02dbe16f2e40b1344 Make SHA1 from the same string in PHP: print "SHA:".sha1("12345"); result : 8cb2237d0679ca88db6464eac60da96345513964 If I try other tools to obtain hash I get the second result, so it looks like the

问题 This question already has answers here : Is it possible to reverse a sha1? (9 answers) Closed 5 years ago . Is it possible to decrypt(retain the actual string) the password which is saved in db using SHA1 algorithm. Example:If password is "password" and it is stored in db as "sha1$4fb4c$2bc693f8a86e2d87f757c382a32e3d50fc945b24" ,is any chance to retain the same "password"(string) from "sha1$4fb4c$2bc693f8a86e2d87f757c382a32e3d50fc945b24" 回答1: SHA1 is a cryptographic hash function, so the

问题 I'm interested in optimizing the hashing of some large files (optimizing wall clock time). The I/O has been optimized well enough already and the I/O device (local SSD) is only tapped at about 25% of capacity, while one of the CPU cores is completely maxed-out. I have more cores available, and in the future will likely have even more cores. So far I've only been able to tap into more cores if I happen to need multiple hashes of the same file, say an MD5 AND a SHA256 at the same time. I can

问题 This is what I see in hudson/users/me/config.xml : [...] <hudson.security.HudsonPrivateSecurityRealm_-Details> <passwordHash>mEDUyJ:0c9e6f2556b9b3a0b9e9046c21490422b4a54877f057b527b2c0bd4dc83342d5</passwordHash> </hudson.security.HudsonPrivateSecurityRealm_-Details> [...] What is the algorithm (if SHA1, than what is the mEDUyJ prefix)? How can I get this hash in PHP, for example? 回答1: The source code responsible for this is found in the hudson.security.HudsonPrivateSecurityRealm class (more