48 lines
1.4 KiB
Go
48 lines
1.4 KiB
Go
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package internal
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import (
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"fmt"
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"os"
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"sync"
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_ "unsafe" // for go:linkname
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goversion "github.com/hashicorp/go-version"
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"github.com/hashicorp/vault/sdk/version"
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)
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const sha1PatchVersionsBefore = "1.12.0"
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var patchSha1 sync.Once
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//go:linkname debugAllowSHA1 crypto/x509.debugAllowSHA1
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var debugAllowSHA1 bool
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// PatchSha1 patches Go 1.18+ to allow certificates with signatures containing SHA-1 hashes to be allowed.
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// It is safe to call this function multiple times.
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// This is necessary to allow Vault 1.10 and 1.11 to work with Go 1.18+ without breaking backwards compatibility
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// with these certificates. See https://go.dev/doc/go1.18#sha1 and
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// https://developer.hashicorp.com/vault/docs/deprecation/faq#q-what-is-the-impact-of-removing-support-for-x-509-certificates-with-signatures-that-use-sha-1
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// for more details.
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// TODO: remove when Vault <=1.11 is no longer supported
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func PatchSha1() {
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patchSha1.Do(func() {
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patchBefore, err := goversion.NewSemver(sha1PatchVersionsBefore)
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if err != nil {
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panic(err)
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}
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patch := false
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v, err := goversion.NewSemver(version.GetVersion().Version)
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if err == nil {
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patch = v.LessThan(patchBefore)
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} else {
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fmt.Fprintf(os.Stderr, "Cannot parse version %s; going to apply SHA-1 deprecation patch workaround\n", version.GetVersion().Version)
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patch = true
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}
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if patch {
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debugAllowSHA1 = true
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}
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})
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}
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