mirror of
https://github.com/securego/gosec.git
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Fix hardcoded_credentials rule to only match on more specific patterns (#1009)
* Fix hardcoded_credentials rule to only match on more specific patterns Signed-off-by: Cosmin Cojocar <gcojocar@adobe.com> * Fix lint warnings Signed-off-by: Cosmin Cojocar <gcojocar@adobe.com> * Fix double escape in regexps Signed-off-by: Cosmin Cojocar <gcojocar@adobe.com> --------- Signed-off-by: Cosmin Cojocar <gcojocar@adobe.com>
This commit is contained in:
Cosmin Cojocar
GitHub
parent
325eb19a54
commit
6c93653a29
2 changed files with 198 additions and 93 deletions
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@ -15,6 +15,7 @@
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package rules
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import (
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"fmt"
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"go/ast"
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"go/token"
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"regexp"
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@ -26,10 +27,169 @@ import (
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"github.com/securego/gosec/v2/issue"
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)
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type secretPattern struct {
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name string
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regexp *regexp.Regexp
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}
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var secretsPatterns = [...]secretPattern{
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{
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name: "RSA private key",
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regexp: regexp.MustCompile(`-----BEGIN RSA PRIVATE KEY-----`),
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},
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{
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name: "SSH (DSA) private key",
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regexp: regexp.MustCompile(`-----BEGIN DSA PRIVATE KEY-----`),
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},
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{
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name: "SSH (EC) private key",
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regexp: regexp.MustCompile(`-----BEGIN EC PRIVATE KEY-----`),
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},
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{
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name: "PGP private key block",
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regexp: regexp.MustCompile(`-----BEGIN PGP PRIVATE KEY BLOCK-----`),
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},
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{
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name: "Slack Token",
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regexp: regexp.MustCompile(`xox[pborsa]-[0-9]{12}-[0-9]{12}-[0-9]{12}-[a-z0-9]{32}`),
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},
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{
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name: "AWS API Key",
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regexp: regexp.MustCompile(`AKIA[0-9A-Z]{16}`),
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},
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{
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name: "Amazon MWS Auth Token",
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regexp: regexp.MustCompile(`amzn\.mws\.[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}`),
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},
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{
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name: "AWS AppSync GraphQL Key",
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regexp: regexp.MustCompile(`da2-[a-z0-9]{26}`),
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},
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{
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name: "GitHub personal access token",
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regexp: regexp.MustCompile(`ghp_[a-zA-Z0-9]{36}`),
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},
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{
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name: "GitHub fine-grained access token",
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regexp: regexp.MustCompile(`github_pat_[a-zA-Z0-9]{22}_[a-zA-Z0-9]{59}`),
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},
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{
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name: "GitHub action temporary token",
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regexp: regexp.MustCompile(`ghs_[a-zA-Z0-9]{36}`),
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},
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{
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name: "Google API Key",
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regexp: regexp.MustCompile(`AIza[0-9A-Za-z\-_]{35}`),
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},
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{
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name: "Google Cloud Platform API Key",
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regexp: regexp.MustCompile(`AIza[0-9A-Za-z\-_]{35}`),
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},
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{
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name: "Google Cloud Platform OAuth",
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regexp: regexp.MustCompile(`[0-9]+-[0-9A-Za-z_]{32}\.apps\.googleusercontent\.com`),
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},
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{
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name: "Google Drive API Key",
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regexp: regexp.MustCompile(`AIza[0-9A-Za-z\-_]{35}`),
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},
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{
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name: "Google Drive OAuth",
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regexp: regexp.MustCompile(`[0-9]+-[0-9A-Za-z_]{32}\.apps\.googleusercontent\.com`),
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},
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{
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name: "Google (GCP) Service-account",
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regexp: regexp.MustCompile(`"type": "service_account"`),
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},
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{
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name: "Google Gmail API Key",
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regexp: regexp.MustCompile(`AIza[0-9A-Za-z\-_]{35}`),
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},
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{
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name: "Google Gmail OAuth",
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regexp: regexp.MustCompile(`[0-9]+-[0-9A-Za-z_]{32}\.apps\.googleusercontent\.com`),
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},
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{
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name: "Google OAuth Access Token",
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regexp: regexp.MustCompile(`ya29\.[0-9A-Za-z\-_]+`),
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},
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{
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name: "Google YouTube API Key",
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regexp: regexp.MustCompile(`AIza[0-9A-Za-z\-_]{35}`),
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},
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{
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name: "Google YouTube OAuth",
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regexp: regexp.MustCompile(`[0-9]+-[0-9A-Za-z_]{32}\.apps\.googleusercontent\.com`),
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},
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{
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name: "Generic API Key",
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regexp: regexp.MustCompile(`[aA][pP][iI]_?[kK][eE][yY].*[''|"][0-9a-zA-Z]{32,45}[''|"]`),
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},
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{
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name: "Generic Secret",
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regexp: regexp.MustCompile(`[sS][eE][cC][rR][eE][tT].*[''|"][0-9a-zA-Z]{32,45}[''|"]`),
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},
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{
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name: "Heroku API Key",
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regexp: regexp.MustCompile(`[hH][eE][rR][oO][kK][uU].*[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}`),
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},
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{
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name: "MailChimp API Key",
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regexp: regexp.MustCompile(`[0-9a-f]{32}-us[0-9]{1,2}`),
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},
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{
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name: "Mailgun API Key",
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regexp: regexp.MustCompile(`key-[0-9a-zA-Z]{32}`),
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},
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{
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name: "Password in URL",
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regexp: regexp.MustCompile(`[a-zA-Z]{3,10}://[^/\\s:@]{3,20}:[^/\\s:@]{3,20}@.{1,100}["'\\s]`),
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},
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{
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name: "Slack Webhook",
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regexp: regexp.MustCompile(`https://hooks\.slack\.com/services/T[a-zA-Z0-9_]{8}/B[a-zA-Z0-9_]{8}/[a-zA-Z0-9_]{24}`),
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},
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{
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name: "Stripe API Key",
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regexp: regexp.MustCompile(`sk_live_[0-9a-zA-Z]{24}`),
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},
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{
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name: "Stripe API Key",
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regexp: regexp.MustCompile(`sk_live_[0-9a-zA-Z]{24}`),
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},
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{
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name: "Stripe Restricted API Key",
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regexp: regexp.MustCompile(`rk_live_[0-9a-zA-Z]{24}`),
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},
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{
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name: "Square Access Token",
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regexp: regexp.MustCompile(`sq0atp-[0-9A-Za-z\-_]{22}`),
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},
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{
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name: "Square OAuth Secret",
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regexp: regexp.MustCompile(`sq0csp-[0-9A-Za-z\-_]{43}`),
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},
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{
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name: "Telegram Bot API Key",
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regexp: regexp.MustCompile(`[0-9]+:AA[0-9A-Za-z\-_]{33}`),
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},
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{
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name: "Twilio API Key",
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regexp: regexp.MustCompile(`SK[0-9a-fA-F]{32}`),
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},
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{
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name: "Twitter Access Token",
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regexp: regexp.MustCompile(`[tT][wW][iI][tT][tT][eE][rR].*[1-9][0-9]+-[0-9a-zA-Z]{40}`),
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},
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{
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name: "Twitter OAuth",
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regexp: regexp.MustCompile(`[tT][wW][iI][tT][tT][eE][rR].*[''|"][0-9a-zA-Z]{35,44}[''|"]`),
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},
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}
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type credentials struct {
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issue.MetaData
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pattern *regexp.Regexp
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patternValue *regexp.Regexp // Pattern for matching string values (LHS on assign statements)
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entropyThreshold float64
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perCharThreshold float64
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truncate int
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@ -56,6 +216,15 @@ func (r *credentials) isHighEntropyString(str string) bool {
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entropyPerChar >= r.perCharThreshold))
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}
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func (r *credentials) isSecretPattern(str string) (bool, string) {
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for _, pattern := range secretsPatterns {
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if pattern.regexp.MatchString(str) {
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return true, pattern.name
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}
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}
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return false, ""
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}
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func (r *credentials) Match(n ast.Node, ctx *gosec.Context) (*issue.Issue, error) {
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switch node := n.(type) {
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case *ast.AssignStmt:
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@ -89,9 +258,9 @@ func (r *credentials) matchAssign(assign *ast.AssignStmt, ctx *gosec.Context) (*
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continue
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}
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if r.patternValue.MatchString(val) {
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if r.ignoreEntropy || r.isHighEntropyString(val) {
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return ctx.NewIssue(assign, r.ID(), r.What, r.Severity, r.Confidence), nil
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if r.ignoreEntropy || r.isHighEntropyString(val) {
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if ok, patternName := r.isSecretPattern(val); ok {
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return ctx.NewIssue(assign, r.ID(), fmt.Sprintf("%s: %s", r.What, patternName), r.Severity, r.Confidence), nil
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}
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}
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}
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@ -120,9 +289,9 @@ func (r *credentials) matchValueSpec(valueSpec *ast.ValueSpec, ctx *gosec.Contex
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// Now that no variable names have been matched, match the actual values to find any creds
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for _, ident := range valueSpec.Values {
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if val, err := gosec.GetString(ident); err == nil {
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if r.patternValue.MatchString(val) {
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if r.ignoreEntropy || r.isHighEntropyString(val) {
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return ctx.NewIssue(valueSpec, r.ID(), r.What, r.Severity, r.Confidence), nil
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if r.ignoreEntropy || r.isHighEntropyString(val) {
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if ok, patternName := r.isSecretPattern(val); ok {
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return ctx.NewIssue(valueSpec, r.ID(), fmt.Sprintf("%s: %s", r.What, patternName), r.Severity, r.Confidence), nil
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}
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}
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}
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@ -159,9 +328,9 @@ func (r *credentials) matchEqualityCheck(binaryExpr *ast.BinaryExpr, ctx *gosec.
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if ok && identStrConst.Kind == token.STRING {
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s, _ := gosec.GetString(identStrConst)
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if r.patternValue.MatchString(s) {
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if r.ignoreEntropy || r.isHighEntropyString(s) {
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return ctx.NewIssue(binaryExpr, r.ID(), r.What, r.Severity, r.Confidence), nil
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if r.ignoreEntropy || r.isHighEntropyString(s) {
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if ok, patternName := r.isSecretPattern(s); ok {
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return ctx.NewIssue(binaryExpr, r.ID(), fmt.Sprintf("%s: %s", r.What, patternName), r.Severity, r.Confidence), nil
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}
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}
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}
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@ -173,7 +342,6 @@ func (r *credentials) matchEqualityCheck(binaryExpr *ast.BinaryExpr, ctx *gosec.
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// assigned to variables that appear to be related to credentials.
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func NewHardcodedCredentials(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
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pattern := `(?i)passwd|pass|password|pwd|secret|token|pw|apiKey|bearer|cred`
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patternValue := "(?i)(^(.*[:;,](\\s)*)?[a-f0-9]{64}$)|(AIza[0-9A-Za-z-_]{35})|(^(.*[:;,](\\s)*)?github_pat_[a-zA-Z0-9]{22}_[a-zA-Z0-9]{59}$)|(^(.*[:;,](\\s)*)?[0-9a-zA-Z-_]{24}$)"
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entropyThreshold := 80.0
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perCharThreshold := 3.0
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ignoreEntropy := false
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@ -186,12 +354,6 @@ func NewHardcodedCredentials(id string, conf gosec.Config) (gosec.Rule, []ast.No
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}
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}
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if configPatternValue, ok := conf["patternValue"]; ok {
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if cfgPatternValue, ok := configPatternValue.(string); ok {
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patternValue = cfgPatternValue
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}
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}
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if configIgnoreEntropy, ok := conf["ignore_entropy"]; ok {
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if cfgIgnoreEntropy, ok := configIgnoreEntropy.(bool); ok {
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ignoreEntropy = cfgIgnoreEntropy
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@ -222,7 +384,6 @@ func NewHardcodedCredentials(id string, conf gosec.Config) (gosec.Rule, []ast.No
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return &credentials{
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pattern: regexp.MustCompile(pattern),
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patternValue: regexp.MustCompile(patternValue),
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entropyThreshold: entropyThreshold,
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perCharThreshold: perCharThreshold,
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ignoreEntropy: ignoreEntropy,
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@ -273,45 +273,8 @@ package main
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import "fmt"
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func main() {
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username := "admin"
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key := "472bb6c8c1871887cc117742ead362d688707d0442de930f7588db9d5ba091cc"
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fmt.Println("Logging in with: ", username, key)
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}`}, 1, gosec.NewConfig()},
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{[]string{`
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package main
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import "fmt"
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const (
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b = "Bearer: c0df7a0f9b4a6a336029689b5df0712459a4f396c609ab05fd21a9097b4264f7"
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)
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func main() {
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fmt.Println(b)
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}`}, 1, gosec.NewConfig()},
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{[]string{`
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package main
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import "fmt"
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const (
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tooLongConst = "key: c0df7a0f9b4a6a336029689b5df0712459a4f396c609ab05fd21a9097b4264f71294129"
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)
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func main() {
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fmt.Println(tooLongConst)
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}`}, 0, gosec.NewConfig()},
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{[]string{`
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package main
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import "fmt"
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const (
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tooShortConst = "key: c0df7a0f9b4a6a336029689b5df0712459a4f396c609ab05fd21a9097b4264f71294"
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)
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func main() {
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fmt.Println(tooShortConst)
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customerNameEnvKey := "FOO_CUSTOMER_NAME"
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fmt.Println(customerNameEnvKey)
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}`}, 0, gosec.NewConfig()},
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{[]string{`
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package main
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@ -319,10 +282,17 @@ package main
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import "fmt"
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func main() {
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compareStr := "test"
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if compareStr == "b7997caa846af0c50c095d63d212be2fbaffd35c22c735a905ddba87d85618fd" {
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fmt.Println(compareStr)
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}
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txnID := "3637cfcc1eec55a50f78a7c435914583ccbc75a21dec9a0e94dfa077647146d7"
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fmt.Println(txnID)
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}`}, 0, gosec.NewConfig()},
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{[]string{`
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package main
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import "fmt"
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func main() {
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urlSecret := "https://username:abcdef0123456789abcdef0123456789abcdef01@contoso.com/"
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fmt.Println(urlSecret)
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}`}, 1, gosec.NewConfig()},
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{[]string{`
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package main
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@ -330,22 +300,18 @@ package main
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import "fmt"
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func main() {
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compareTooShort := "test"
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if compareTooShort == "b7997caa846af0c50c095d63d212be2fbaffd35c22c735a905ddba87d85618d" {
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fmt.Println(compareTooShort)
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}
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}`}, 0, gosec.NewConfig()},
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githubToken := "ghp_iR54dhCYg9Tfmoywi9xLmmKZrrnAw438BYh3"
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fmt.Println(githubToken)
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}`}, 1, gosec.NewConfig()},
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{[]string{`
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package main
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import "fmt"
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func main() {
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compareTooLong := "test"
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if compareTooLong == "b7997caa846af0c50c095d63d212be2fbaffd35c22c735a905ddba87d85618fd11" {
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fmt.Println(compareTooLong)
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}
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}`}, 0, gosec.NewConfig()},
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awsAccessKeyID := "AKIAI44QH8DHBEXAMPLE"
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fmt.Println(awsAccessKeyID)
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}`}, 1, gosec.NewConfig()},
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{[]string{`
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package main
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@ -356,28 +322,6 @@ func main() {
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if compareGoogleAPI == "AIzajtGS_aJGkoiAmSbXzu9I-1eytAi9Lrlh-vT" {
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fmt.Println(compareGoogleAPI)
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}
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}`}, 1, gosec.NewConfig()},
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{[]string{`
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package main
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import "fmt"
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const (
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githubPAT = "key: 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"
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)
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func main() {
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fmt.Println(githubPAT)
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}`}, 1, gosec.NewConfig()},
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{[]string{`
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package main
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import "fmt"
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func main() {
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username := "admin"
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googOAuthSec := "uibYYslvAUKn2ORRJ7EaZtMs"
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fmt.Println("Logging in with: ", username, googOAuthSec)
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}`}, 1, gosec.NewConfig()},
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}
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