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docs: use digest-based cosign signing

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yeasy
2026-05-21 19:14:33 -07:00
parent 9ef842ebb3
commit a3567ff6a0
1 changed files with 6 additions and 5 deletions
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18_security/18.6_image_security.md
+6 -5
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@@ -240,8 +240,9 @@ cosign generate-key-pair
**签名镜像：**
```bash
# 使用私钥签名（推送到仓库前）
cosign sign --key cosign.key myregistry.com/myapp:v1.0.0
# 先推送镜像，再使用不可变 digest 签名
IMAGE_DIGEST="myregistry.com/myapp@sha256:<digest>"
cosign sign --key cosign.key "$IMAGE_DIGEST"
# 系统会提示输入私钥密码
```
@@ -249,7 +250,7 @@ cosign sign --key cosign.key myregistry.com/myapp:v1.0.0
```bash
# 使用公钥验证
cosign verify --key cosign.pub myregistry.com/myapp:v1.0.0
cosign verify --key cosign.pub "$IMAGE_DIGEST"
# 输出结果示例
# Verification successful!
@@ -266,10 +267,10 @@ cosign verify --key cosign.pub myregistry.com/myapp:v1.0.0
```bash
# 在 GitHub Actions 等 CI 中无需存储密钥
cosign sign --yes myregistry.com/myapp:v1.0.0
cosign sign --yes "$IMAGE_DIGEST"
# 验证时自动使用 OIDC 令牌验证身份
cosign verify myregistry.com/myapp:v1.0.0 \
cosign verify "$IMAGE_DIGEST" \
--certificate-identity https://github.com/myorg/myrepo/.github/workflows/build.yml@refs/heads/main \
--certificate-oidc-issuer https://token.actions.githubusercontent.com
```