m3u8 ts文件解密之使用go语言AES库实现加解密

// The AES block size in bytes.
const BlockSize = 16

// NewCipher creates and returns a new cipher.Block. The key argument should be the AES key, either 16, 24, or 32 bytes to select AES-128, AES-192, or AES-256.
func NewCipher(key []byte) (cipher.Block, error)

type Block interface {
   
   
    // BlockSize returns the cipher's block size.
    BlockSize() int

    // Encrypt encrypts the first block in src into dst.
    // Dst and src may point at the same memory.
    Encrypt(dst, src []byte)

    // Decrypt decrypts the first block in src into dst.
    // Dst and src may point at the same memory.
    Decrypt(dst, src []byte)
}
type BlockMode interface {
   
   
    // BlockSize returns the mode's block size.
    BlockSize() int

    // CryptBlocks encrypts or decrypts a number of blocks. The length of
    // src must be a multiple of the block size. Dst and src may point to
    // the same memory.
    CryptBlocks(dst, src []byte)
}
func NewCBCDecrypter(b Block, iv []byte) BlockMode
func NewCBCEncrypter(b Block, iv []byte) BlockMode

官方例子
https://go-zh.org/pkg/crypto/cipher/#example_NewCBCDecrypter

package main

import