diff options
Diffstat (limited to 'vendor/github.com/pion/dtls/v2/pkg/crypto/fingerprint/hash.go')
-rw-r--r-- | vendor/github.com/pion/dtls/v2/pkg/crypto/fingerprint/hash.go | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/vendor/github.com/pion/dtls/v2/pkg/crypto/fingerprint/hash.go b/vendor/github.com/pion/dtls/v2/pkg/crypto/fingerprint/hash.go new file mode 100644 index 0000000..09107db --- /dev/null +++ b/vendor/github.com/pion/dtls/v2/pkg/crypto/fingerprint/hash.go @@ -0,0 +1,37 @@ +package fingerprint + +import ( + "crypto" + "errors" +) + +var errInvalidHashAlgorithm = errors.New("fingerprint: invalid hash algorithm") + +func nameToHash() map[string]crypto.Hash { + return map[string]crypto.Hash{ + "md5": crypto.MD5, // [RFC3279] + "sha-1": crypto.SHA1, // [RFC3279] + "sha-224": crypto.SHA224, // [RFC4055] + "sha-256": crypto.SHA256, // [RFC4055] + "sha-384": crypto.SHA384, // [RFC4055] + "sha-512": crypto.SHA512, // [RFC4055] + } +} + +// HashFromString allows looking up a hash algorithm by it's string representation +func HashFromString(s string) (crypto.Hash, error) { + if h, ok := nameToHash()[s]; ok { + return h, nil + } + return 0, errInvalidHashAlgorithm +} + +// StringFromHash allows looking up a string representation of the crypto.Hash. +func StringFromHash(hash crypto.Hash) (string, error) { + for s, h := range nameToHash() { + if h == hash { + return s, nil + } + } + return "", errInvalidHashAlgorithm +} |