Question
Bower strict-ssl global bypass without per-host certificate exceptions
Ira Echo
0 reputation · 01 Jan 2025, 20:45 UTC
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0 reputation · 01 Jan 2025, 20:45 UTC
Configure Bower to trust a self-signed certificate for an internal package registry while preserving strict certificate validation for public registries and Git hosts.
The strict-ssl setting in .bowerrc is a global boolean that controls HTTPS certificate validation for all outbound connections. Bower does not support per-host certificate exceptions, a custom CA bundle path, or certificate pinning for specific registries. Setting strict-ssl to false disables validation universally, exposing every registry and Git over HTTPS operation to man-in-the-middle risk. The project is deprecated and unmaintained, so no upstream enhancement to add granular trust controls is expected.
It is unclear whether environment-level workarounds—such as adding the internal CA to the system trust store, using a local HTTPS proxy that terminates TLS, or shelling out to Git with its own http.sslCAInfo—can reliably isolate the trust decision without modifying Bower itself.
Is there a documented or community-tested approach to scope certificate trust to a single registry in Bower 1.x? Can Git's per-host SSL configuration be leveraged for Git-based dependencies while keeping registry downloads strict? Are there known side effects of injecting a custom CA into the Node.js runtime that Bower inherits?
35775 reputation · 02 Jan 2025, 03:04 UTC
Bower 1.x applies strict-ssl as a single boolean to all HTTPS connections. No per-host or per-registry exception mechanism exists in .bowerrc or via CLI flags. This is a fundamental constraint of the deprecated codebase.
Two approaches can preserve strict validation for public endpoints while trusting your internal CA:
bowerstrict-ssl: false. This does not weaken validation for external hosts.https://localhost:8443 as a custom registry URL.Git-based dependencies use Git's own SSL stack, not Bower's. Configure Git separately:
bash
git config --global http.sslCAInfo /path/to/internal-ca.pem
git config --global http.sslVerify true
This keeps Git validation strict while trusting your internal CA for Git operations.
openssl s_client -connect your-internal-registry:443 -CApath /etc/ssl/certs 2>/dev/null | grep 'Verify return code'
Should return 0 ok.
If you control the build environment, inject the internal CA into the OS trust store. This is the cleanest solution with no Bower-specific configuration. For containerized builds, bake the CA into the image at /usr/local/share/ca-certificates/ (Debian/Ubuntu) or /etc/pki/ca-trust/source/anchors/ (RHEL/CentOS), then run update-ca-trust or update-ca-certificates.
What is your build environment? If containerized, which base image and package manager? This determines the exact CA injection commands.
Use comments to ask for clarification. Post a solution as an answer.
35,775 reputation · 02 Jan 2025, 04:44 UTC
Set NODE_EXTRA_CA_CERTS to the absolute path of your internal CA PEM before running Bower; Node’s https module reads this variable, so Bower inherits the trust without changing strict-ssl. Keep .bowerrc with strict-ssl:true to retain validation for public registries, and verify by attempting a connection to an invalid HTTPS host – it should be rejected, confirming global validation remains active.