[go] crypto/x509: add SignatureAlgorithm.Hash()
Gerrit Bot (Gerrit)
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crypto/x509: add SignatureAlgorithm.Hash()
Add method to return the hashing algorithm associated with a
certificates signature algorithm. This is useful when generating TLS
channel bindings as documented in RFC 5929.
Fixes #33317
Change-Id: Ib9d9cbca4a33d0e46fad4df1ee02a62d1514b254
GitHub-Last-Rev: 4a4c23d3af176455c648639e37d4b1c49c3df7df
GitHub-Pull-Request: golang/go#33318
---
M src/crypto/x509/x509.go
1 file changed, 9 insertions(+), 0 deletions(-)
diff --git a/src/crypto/x509/x509.go b/src/crypto/x509/x509.go
index 1cd8fde..4798ec8 100644
--- a/src/crypto/x509/x509.go
+++ b/src/crypto/x509/x509.go
@@ -219,6 +219,15 @@
return strconv.Itoa(int(algo))
}
+func (algo SignatureAlgorithm) Hash() crypto.Hash {
+ for _, details := range signatureAlgorithmDetails {
+ if details.algo == algo {
+ return details.hash
+ }
+ }
+ return crypto.Hash(0)
+}
+
type PublicKeyAlgorithm int
const (
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