# AssumeRoleWithCertificate [![Slack](https://slack.min.io/slack?type=svg)](https://slack.min.io)

## Introduction

MinIO provides a custom STS API that allows authentication with client X.509 / TLS certificates.

```

#### 3.3.3 Generate a public certificate

Create a file called `cert.cnf` with the content below. This file contains all of the information necessary to generate a certificate using `certtool.exe`:

```
# X.509 Certificate options
#
# DN options

# The organization of the subject.
organization = "Example Inc."

# The organizational unit of the subject.
#unit = "sleeping dept."

            }
            try (final InputStream in = new FileInputStream(authorities)) {
                final Certificate certificate = CertificateFactory.getInstance("X.509").generateCertificate(in);

                final KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
                keyStore.load(null, null);
                keyStore.setCertificateEntry("server", certificate);

        final String filename = "config/certs/http_ca.crt";
        try (InputStream in = new FileInputStream(filename)) {
            Certificate certificate = CertificateFactory.getInstance("X.509").generateCertificate(in);

            KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
            keyStore.load(null, null);
            keyStore.setCertificateEntry("server", certificate);

			return
		}
	}

	// We map the X.509 subject common name to the policy. So, a client
	// with the common name "foo" will be associated with the policy "foo".
	// Other mapping functions - e.g. public-key hash based mapping - are
	// possible but not implemented.
	//
	// Group mapping is not possible with standard X.509 certificates.
	if certificate.Subject.CommonName == "" {

		},
		config.HelpKV{
			Key:         config.IdentityLDAPSubSys,
			Description: "enable LDAP SSO support",
		},
		config.HelpKV{
			Key:         config.IdentityTLSSubSys,
			Description: "enable X.509 TLS certificate SSO support",
		},
		config.HelpKV{
			Key:         config.IdentityPluginSubSys,
			Description: "enable Identity Plugin via external hook",
		},
		config.HelpKV{

	objectInputs := []ObjectInput{
		// Unencrypted objects
		{"nothing", []int64{0}, nil},
		{"small-1", []int64{509}, nil},

		{"mp-1", []int64{5 * oneMiB, 1}, nil},
		{"mp-2", []int64{5487701, 5487799, 3}, nil},

		// Encrypted object
		{"enc-nothing", []int64{0}, mapCopy(metaWithSSEC)},
		{"enc-small-1", []int64{509}, mapCopy(metaWithSSEC)},

		{"enc-mp-1", []int64{5 * oneMiB, 1}, mapCopy(metaWithSSEC)},

      val length = readInt(source)
      if (length == -1) return emptyList() // OkHttp v1.2 used -1 to indicate null.

      try {
        val certificateFactory = CertificateFactory.getInstance("X.509")
        val result = ArrayList<Certificate>(length)
        for (i in 0 until length) {
          val line = source.readUtf8LineStrict()
          val bytes = Buffer()

This setting is available in Go 1.21.12, Go 1.22.5, Go 1.23, and later.
There is no plan to remove this setting.

### Go 1.18

Go 1.18 removed support for SHA1 in most X.509 certificates,
controlled by the [`x509sha1` setting](/pkg/crypto/x509#InsecureAlgorithmError).
This setting was removed in Go 1.24.

### Go 1.10

Go 1.10 changed how build caching worked and added test caching, along

		ldapInit   bool
		authNInit  bool
		authZInit  bool
	)

	stsTLSConfig, err := xtls.Lookup(s[config.IdentityTLSSubSys][config.Default])
	if err != nil {
		iamLogIf(ctx, fmt.Errorf("Unable to initialize X.509/TLS STS API: %w", err), logger.WarningKind)
	} else {
		if stsTLSConfig.InsecureSkipVerify {