mirror of
https://github.com/nadoo/glider.git
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52 lines
1020 B
Go
52 lines
1020 B
Go
package tools
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import (
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"crypto/hmac"
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"crypto/md5"
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"crypto/sha1"
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)
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func HmacMD5(key []byte, data []byte) []byte {
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hmacMD5 := hmac.New(md5.New, key)
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hmacMD5.Write(data)
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return hmacMD5.Sum(nil)[:16]
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}
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func HmacSHA1(key []byte, data []byte) []byte {
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hmacSHA1 := hmac.New(sha1.New, key)
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hmacSHA1.Write(data)
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return hmacSHA1.Sum(nil)[:20]
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}
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func MD5Sum(d []byte) []byte {
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h := md5.New()
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h.Write(d)
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return h.Sum(nil)
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}
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func SHA1Sum(d []byte) []byte {
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h := sha1.New()
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h.Write(d)
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return h.Sum(nil)
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}
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func EVPBytesToKey(password string, keyLen int) (key []byte) {
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const md5Len = 16
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cnt := (keyLen-1)/md5Len + 1
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m := make([]byte, cnt*md5Len)
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copy(m, MD5Sum([]byte(password)))
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// Repeatedly call md5 until bytes generated is enough.
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// Each call to md5 uses data: prev md5 sum + password.
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d := make([]byte, md5Len+len(password))
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start := 0
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for i := 1; i < cnt; i++ {
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start += md5Len
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copy(d, m[start-md5Len:start])
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copy(d[md5Len:], password)
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copy(m[start:], MD5Sum(d))
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}
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return m[:keyLen]
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}
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