52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
// Copyright (C) 2017. See AUTHORS.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package openssl
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// #include "shim.h"
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import "C"
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import (
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"fmt"
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"unsafe"
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)
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// Digest represents and openssl message digest.
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type Digest struct {
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ptr *C.EVP_MD
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}
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// GetDigestByName returns the Digest with the name or nil and an error if the
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// digest was not found.
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func GetDigestByName(name string) (*Digest, error) {
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cname := C.CString(name)
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defer C.free(unsafe.Pointer(cname))
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p := C.X_EVP_get_digestbyname(cname)
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if p == nil {
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return nil, fmt.Errorf("Digest %v not found", name)
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}
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// we can consider digests to use static mem; don't need to free
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return &Digest{ptr: p}, nil
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}
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// GetDigestByName returns the Digest with the NID or nil and an error if the
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// digest was not found.
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func GetDigestByNid(nid NID) (*Digest, error) {
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sn, err := Nid2ShortName(nid)
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if err != nil {
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return nil, err
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}
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return GetDigestByName(sn)
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}
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