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- Added golang feature for enabling individual and ccla sign process Signed-off-by: Harold Wanyama <hwanyama@contractor.linuxfoundation.org>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| // Copyright The Linux Foundation and each contributor to CommunityBridge. | ||
| // SPDX-License-Identifier: MIT | ||
|
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| package docusignauth | ||
|
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| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "os" | ||
| "strings" | ||
| "time" | ||
|
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| jwt "github.com/dgrijalva/jwt-go" | ||
| ) | ||
|
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| var ( | ||
| baseURL = os.Getenv("DOCUSIGN_BASE_URL") | ||
| oauthTokenURL = baseURL + "/oauth/token" | ||
| jwtGrantAssertion = "urn:ietf:params:oauth:grant-type:jwt-bearer" | ||
| ) | ||
|
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| type TokenResponse struct { | ||
| AccessToken string `json:"access_token"` | ||
| TokenType string `json:"token_type"` | ||
| } | ||
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| func GetAccessToken(integrationKey, userGUID, privateKey string) (string, error) { | ||
| // Generate the JWT token | ||
| tokenString, err := generateJWT(integrationKey, userGUID, privateKey) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
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| // Make the HTTP request to get the access token | ||
| body := strings.NewReader(fmt.Sprintf("grant_type=%s&assertion=%s", jwtGrantAssertion, tokenString)) | ||
| req, err := http.NewRequest("POST", oauthTokenURL, body) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
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| req.Header.Add("Content-Type", "application/x-www-form-urlencoded") | ||
|
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| client := &http.Client{} | ||
| resp, err := client.Do(req) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| defer resp.Body.Close() // nolint | ||
|
|
||
| if resp.StatusCode != http.StatusOK { | ||
| return "", fmt.Errorf("failed to get access token, status: %s", resp.Status) | ||
| } | ||
|
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| respBody, err := io.ReadAll(resp.Body) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
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| var tokenResponse TokenResponse | ||
| if err := json.Unmarshal(respBody, &tokenResponse); err != nil { | ||
| return "", err | ||
| } | ||
|
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| return tokenResponse.AccessToken, nil | ||
| } | ||
|
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| func generateJWT(integrationKey, userGUID, privateKey string) (string, error) { | ||
| token := jwt.NewWithClaims(jwt.SigningMethodRS256, jwt.MapClaims{ | ||
| "iss": integrationKey, // Integration Key | ||
| "sub": userGUID, // User GUID | ||
| "aud": baseURL, // Base URL | ||
| "iat": time.Now().Unix(), // Issued At | ||
| "exp": time.Now().Add(1 * time.Hour).Unix(), // Expiration time - 1 hour is recommended | ||
| "scope": "signature", // Permission scope | ||
| }) | ||
|
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| signKey, err := jwt.ParseRSAPrivateKeyFromPEM([]byte(privateKey)) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
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| tokenString, err := token.SignedString(signKey) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
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| return tokenString, nil | ||
| } |
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