From 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Sun, 7 Apr 2024 13:41:34 -0500 Subject: new repository --- devdocs/go/crypto%2Fsha256%2Findex.html | 45 +++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 devdocs/go/crypto%2Fsha256%2Findex.html (limited to 'devdocs/go/crypto%2Fsha256%2Findex.html') diff --git a/devdocs/go/crypto%2Fsha256%2Findex.html b/devdocs/go/crypto%2Fsha256%2Findex.html new file mode 100644 index 00000000..a11414b2 --- /dev/null +++ b/devdocs/go/crypto%2Fsha256%2Findex.html @@ -0,0 +1,45 @@ +

Package sha256

import "crypto/sha256"
Overview
Index
Examples

Overview

Package sha256 implements the SHA224 and SHA256 hash algorithms as defined in FIPS 180-4.

Examples

New

New (File)

Sum256

Package files

sha256.go sha256block.go sha256block_amd64.go sha256block_decl.go

Constants

The blocksize of SHA256 and SHA224 in bytes.

const BlockSize = 64

The size of a SHA256 checksum in bytes.

const Size = 32

The size of a SHA224 checksum in bytes.

const Size224 = 28

func New

func New() hash.Hash

New returns a new hash.Hash computing the SHA256 checksum. The Hash also implements encoding.BinaryMarshaler and encoding.BinaryUnmarshaler to marshal and unmarshal the internal state of the hash.

Example +

Code:

h := sha256.New()
+h.Write([]byte("hello world\n"))
+fmt.Printf("%x", h.Sum(nil))
+

Output:

a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447
+

Example (File) +

Code:

+f, err := os.Open("file.txt")
+if err != nil {
+    log.Fatal(err)
+}
+defer f.Close()
+
+h := sha256.New()
+if _, err := io.Copy(h, f); err != nil {
+    log.Fatal(err)
+}
+
+fmt.Printf("%x", h.Sum(nil))
+

func New224

func New224() hash.Hash

New224 returns a new hash.Hash computing the SHA224 checksum.

func Sum224 1.2

func Sum224(data []byte) [Size224]byte

Sum224 returns the SHA224 checksum of the data.

func Sum256 1.2

func Sum256(data []byte) [Size]byte

Sum256 returns the SHA256 checksum of the data.

Example +

Code:

sum := sha256.Sum256([]byte("hello world\n"))
+fmt.Printf("%x", sum)
+

Output:

a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447
+

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