diff options
Diffstat (limited to 'libgo/go/crypto/crypto.go')
| -rw-r--r-- | libgo/go/crypto/crypto.go | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/libgo/go/crypto/crypto.go b/libgo/go/crypto/crypto.go index 184ea9d4d62..a80ebd36931 100644 --- a/libgo/go/crypto/crypto.go +++ b/libgo/go/crypto/crypto.go @@ -109,7 +109,7 @@ type Signer interface { // private key. Public() PublicKey - // Sign signs msg with the private key, possibly using entropy from + // Sign signs digest with the private key, possibly using entropy from // rand. For an RSA key, the resulting signature should be either a // PKCS#1 v1.5 or PSS signature (as indicated by opts). For an (EC)DSA // key, it should be a DER-serialised, ASN.1 signature structure. @@ -118,7 +118,11 @@ type Signer interface { // simply pass in the hash function used as opts. Sign may also attempt // to type assert opts to other types in order to obtain algorithm // specific values. See the documentation in each package for details. - Sign(rand io.Reader, msg []byte, opts SignerOpts) (signature []byte, err error) + // + // Note that when a signature of a hash of a larger message is needed, + // the caller is responsible for hashing the larger message and passing + // the hash (as digest) and the hash function (as opts) to Sign. + Sign(rand io.Reader, digest []byte, opts SignerOpts) (signature []byte, err error) } // SignerOpts contains options for signing with a Signer. |