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36 lines
990 B
Go
36 lines
990 B
Go
// Copyright (c) 2015 Dalton Hubble. All rights reserved.
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// Copyrights licensed under the MIT License.
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package oauth1
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import (
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"crypto"
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"crypto/rand"
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"crypto/rsa"
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"crypto/sha1"
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"encoding/base64"
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"net/http"
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"strings"
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)
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// signatureBase returns the OAuth1 signature base string
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// according to RFC5849 3.4.1.
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func signatureBase(req *http.Request, params map[string]string) string {
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method := strings.ToUpper(req.Method)
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baseURL := baseURI(req)
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parameterString := encodeParameterString(params)
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baseParts := []string{method,
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percentEncode(baseURL),
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percentEncode(parameterString)}
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return strings.Join(baseParts, "&")
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}
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// sign calculates the signature of the message SHA1 digests
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// using the given RSA private key.
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func sign(privateKey *rsa.PrivateKey, message string) (string, error) {
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digest := sha1.Sum([]byte(message))
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signature, err := rsa.SignPKCS1v15(
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rand.Reader, privateKey, crypto.SHA1, digest[:])
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return base64.StdEncoding.EncodeToString(signature), err
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}
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