用python3写能够对图片进行sm3加密注入盲水印的代码，再写一个能够进行sm3解密提取盲水印的代码

我可以回答这个问题。以下是用Python3编写的对图片进行SM3加密注入盲水印的代码：

import hashlib
from PIL import Image

def sm3_hash(data):
    return hashlib.sm3(data).hexdigest()

def embed_watermark(image_path, watermark):
    image = Image.open(image_path)
    width, height = image.size
    watermark_hash = sm3_hash(watermark.encode('utf-8'))
    for x in range(width):
        for y in range(height):
            pixel = list(image.getpixel((x, y)))
            pixel_hash = sm3_hash(str(pixel).encode('utf-8'))
            if pixel_hash == watermark_hash:
                continue
            pixel.append(int(watermark_hash[x % len(watermark_hash)]))
            image.putpixel((x, y), tuple(pixel))
    image.save(image_path)

def extract_watermark(image_path, watermark_length):
    image = Image.open(image_path)
    width, height = image.size
    watermark_hash = ''
    for x in range(width):
        for y in range(height):
            pixel = list(image.getpixel((x, y)))
            watermark_hash += str(pixel[-1])
            if len(watermark_hash) == watermark_length:
                return watermark_hash
    return None

使用方法：

# 加密注入盲水印
image_path = 'image.png'
watermark = 'This is a watermark'
embed_watermark(image_path, watermark)

# 解密提取盲水印
watermark_length = len(sm3_hash(watermark.encode('utf-8')))
extracted_watermark = extract_watermark(image_path, watermark_length)
print(extracted_watermark)

注意：这个代码只是一个简单的示例，实际使用时需要考虑更多的安全性和可靠性问题。