Golang sha1,base64

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1.BASE64 encoding

Package Main//This syntax introduces the ENCODING/BASE64 package and uses the name b64 instead of the default base64. This saves you a bit of space. Import b64"encoding/base64"Import"FMT"Func Main () {//This is the string that will be encoded. Data: ="abc123!? $*& () '-=@~"    //Go supports both standard and URL-compatible base64 formats. The encoding needs to use []byte type parameters, so the string will be converted to this type. SENC: = b64. Stdencoding.encodetostring ([]byte(data)) FMT. Println (SENC)//decoding may return an error, and if you are unsure whether the input information is properly formatted, then you will need to do a bug check. Sdec, _: =b64. Stdencoding.decodestring (SENC) fmt. Println (string(SDEC)) fmt. Println ()//codecs are encoded using the URL-compatible base64 format. UENC: = b64. Urlencoding.encodetostring ([]byte(data)) FMT. Println (UENC) UDec, _:=b64. Urlencoding.decodestring (UENC) fmt. Println (string(UDEC))//standard base64 encoding and URL-compatible base64 encoded strings are slightly different (suffix + and-), but both can be correctly decoded to the original string. }/*The results are as follows: $ go run base64-encoding.goywjjmtizit8kkiyoksctpub+abc123!? $*& () '-=@~ywjjmtizit8kkiyoksctpub-abc123!? $*& () '-=@~*/

2.SHA1 encryption

Package Main//Go implements a series of hash functions in multiple crypto/* packages. Import"CRYPTO/SHA1"Import"FMT"Func Main () {s:="SHA1 This string"    //the way to produce a hash is SHA1. New (), SHA1. Write (bytes), and then SHA1. Sum ([]byte{}). Here we start with a new hash. H: =SHA1. New ()//writes the bytes to be processed. If it is a string, you need to use []byte (s) to force the conversion to a byte array. H.write ([]byte(s))//This is used to get the final hash value of the character slice. The Sum parameter can be used to append additional byte slices to the existing character slices: generally not required. BS: =h.sum (Nil)//SHA1 values are often output in 16, for example in Git commit. Use%x to format the hash result as a 16 binary string. FMT. Println (s) fmt. Printf ("%x\n", BS)}/*The Run program computes the hash value and outputs it in a readable 16-in format. $ go Run SHA1-HASHES.GOSHA1 This stringcf23df2207d99a74fbe169e3eba035e633b65d94 you can use the similar method above to calculate other forms of hash values. For example, calculate MD5 hashes, introduce CRYPTO/MD5, and use MD5. New () method. Note that if you need a secure hash of cryptography, you need to look carefully at the hash strength. */