10.4. 安装和使用 Cosign

流程

1. 输入以下 go 命令直接安装 Cosign：

   $ go install github.com/sigstore/cosign/cmd/cosign@v1.0.0

   输出示例

   go: downloading github.com/sigstore/cosign v1.0.0
   go: downloading github.com/peterbourgon/ff/v3 v3.1.0

2. 输入以下命令为 Cosign 生成键值对：

   $ cosign generate-key-pair

   输出示例

   Enter password for private key:
   Enter again:
   Private key written to cosign.key
   Public key written to cosign.pub

3. 输入以下命令为键值对签名：

   $ cosign sign -key cosign.key quay-server.example.com/user1/busybox:test

   输出示例

   Enter password for private key:
   Pushing signature to: quay-server.example.com/user1/busybox:sha256-ff13b8f6f289b92ec2913fa57c5dd0a874c3a7f8f149aabee50e3d01546473e3.sig

   如果您遇到 错误： signing quay-server.example.com/user1/busybox:test: getting remote image: GET https://quay-server.example.com/v2/user1/busybox/manifests/test: UNAUTHORIZED: access to the requested resource is not authorized; map[] error，因为 Cosign 依赖于 ~./docker/config.json 用于授权，您可能需要执行以下命令：

   $ podman login --authfile ~/.docker/config.json quay-server.example.com

   输出示例

   Username:
   Password:
   Login Succeeded!

4. 输入以下命令查看更新的授权配置：

   $ cat ~/.docker/config.json
   {
   	"auths": {
   		"quay-server.example.com": {
   			"auth": "cXVheWFkbWluOnBhc3N3b3Jk"
   		}
   	}