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Comment:Added Certificate Revocation List (CRL) to X509 status. Moved get X509 extension items to end of function.
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SHA3-256: f22fb82c96fa91eda3df21250ab5b149506272e9a26008d1a2bc5143332e85c4
User & Date: bohagan on 2023-08-02 01:17:14
Other Links: branch diff | manifest | tags
Context
2023-08-07
03:27
Added Issuer Alt Name to X509 status, refactored get SAN and CRL check-in: 35be4894ce user: bohagan tags: status_x509
2023-08-02
01:17
Added Certificate Revocation List (CRL) to X509 status. Moved get X509 extension items to end of function. check-in: f22fb82c96 user: bohagan tags: status_x509
2023-08-01
22:42
Added Certificate purposes to X509 status output. Corrected certificate alias get text bug. Refactored code to reduce number of variables and use common buffers for SHA fingerprints. check-in: e94d9cae93 user: bohagan tags: status_x509
Changes
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Modified generic/tlsX509.c from [a4177f2631] to [6962c4384a].

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    char serial[BUFSIZ];
    char notBefore[BUFSIZ];
    char notAfter[BUFSIZ];
    char buffer[BUFSIZ];
    char certStr[CERT_STR_SIZE];
    unsigned char md[EVP_MAX_MD_SIZE];
    STACK_OF(GENERAL_NAME) *san;
    STACK_OF(DIST_POINT) *crl;
    STACK_OF(OPENSSL_STRING) *ocsp;

    certStr[0]   = 0;
    subject[0]   = 0;
    issuer[0]    = 0;
    serial[0]    = 0;
    notBefore[0] = 0;
    notAfter[0]  = 0;
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	    notAfter[max(n, 0)] = 0;
	    (void)BIO_flush(bio);
	}

	BIO_free(bio);
    }

    /* Version */
    /* Version of the encoded certificate */
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("version", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewLongObj(X509_get_version(cert)+1));

    /* Signature algorithm */
    /* Signature algorithm used by the CA to sign the certificate. Must match signatureAlgorithm. */
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("signature", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(OBJ_nid2ln(X509_get_signature_nid(cert)),-1));

    /* SHA1 Fingerprint of cert - DER representation */
    X509_digest(cert, EVP_sha1(), md, &len);
    len = String_to_Hex(md, len, buffer, BUFSIZ);
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("sha1_hash", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(buffer, len));

    /* SHA256 Fingerprint of cert - DER representation */
    X509_digest(cert, EVP_sha256(), md, &len);
    len = String_to_Hex(md, len, buffer, BUFSIZ);
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("sha256_hash", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(buffer, len));

    /* The subject identifies the entity associated with the public key stored in the subject public key field.  */
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("subject", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(subject, -1));

    /* The issuer identifies the entity that has signed and issued the certificate. */
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("issuer", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(issuer, -1));

    /* Certificate validity period is the time interval during which the CA
   warrants that it will maintain information about the status of the certificate. */
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("notBefore", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(notBefore, -1));

    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("notAfter", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(notAfter, -1));

    /* Unique number assigned by CA to certificate. */
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("serialNumber", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(serial, -1));

    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("certificate", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(certStr, -1));

    num_of_exts = X509_get_ext_count(cert);
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("num_extensions", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewIntObj(num_of_exts));

    /* Information about the signature of certificate cert */
    /* Contains the public key and identify the algorithm with which the key is used */
    if (X509_get_signature_info(cert, &nid, &pknid, &bits, &xflags) == 1) {
	ASN1_BIT_STRING *key;

	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("signingDigest", -1));
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(OBJ_nid2ln(nid),-1));
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("publicKeyAlgorithm", -1));
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(OBJ_nid2ln(pknid),-1));
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	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(buffer, len));

	/* Check if cert was issued by CA cert issuer or self signed */
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("self_signed", -1));
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewBooleanObj(X509_check_issued(cert, cert) == X509_V_OK));
    }

    /* Unique Ids */
    /* Unique Ids -  The unique identifiers are present in the certificate to handle the
	possibility of reuse of subject and/or issuer names over time.*/
    {
	const ASN1_BIT_STRING *iuid, *suid;
        X509_get0_uids(cert, &iuid, &suid);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("issuerUniqueId", -1));
	if (iuid != NULL) {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewByteArrayObj((char *)iuid->data, iuid->length));
	} else {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("", -1));
	}

	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("subjectUniqueId", -1));
	if (suid != NULL) {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewByteArrayObj((char *)suid->data, suid->length));
	} else {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("", -1));
	}
    }

    /* Count of extensions */
    num_of_exts = X509_get_ext_count(cert);
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("num_extensions", -1));
    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewIntObj(num_of_exts));

    /* Get extensions */
    /* Get extension names */
    if (num_of_exts > 0) {
	Tcl_Obj *extsPtr = Tcl_NewListObj(0, NULL);
	const STACK_OF(X509_EXTENSION) *exts;
	exts = X509_get0_extensions(cert);

	for (int i=0; i < num_of_exts; i++) {
	    X509_EXTENSION *ex = sk_X509_EXTENSION_value(exts, i);
	    ASN1_OBJECT *obj = X509_EXTENSION_get_object(ex);
	    unsigned nid2 = OBJ_obj2nid(obj);
	    Tcl_ListObjAppendElement(interp, extsPtr, Tcl_NewStringObj(OBJ_nid2ln(nid2), -1));
	}
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("extensions", -1));
	Tcl_ListObjAppendElement(interp, certPtr, extsPtr);
    }

    /* Certificate Alias as UTF-8 string */
    {
	unsigned char *bstring;
	len = 0;
	bstring = X509_alias_get0(cert, &len);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("alias", -1));
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj((char *)bstring, len));
    }

    /* Get Subject Key id, Authority Key id. The Authority Key Identifier (AKI) of a
	certificate should be the Subject Key Identifier (SKI) of its signer (the CA). */
    {
	/* Identifies certificates that contain a particular public key */
	ASN1_OCTET_STRING *astring;
	/* X509_keyid_get0 */
	astring = X509_get0_subject_key_id(cert);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("subjectKeyIdentifier", -1));
	if (astring != NULL) {
	    len = String_to_Hex((char *)ASN1_STRING_get0_data(astring), ASN1_STRING_length(astring), buffer, BUFSIZ);
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(buffer, len));
	} else {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("", -1));
	}

	/* Identifies the public key corresponding to the private key used to sign a certificate */
	astring = X509_get0_authority_key_id(cert);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("authorityKeyIdentifier", -1));
	if (astring != NULL) {
	    len = String_to_Hex((char *)ASN1_STRING_get0_data(astring), ASN1_STRING_length(astring), buffer, BUFSIZ);
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(buffer, len));
	} else {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("", -1));
	}
	
	/*  const GENERAL_NAMES *X509_get0_authority_issuer(cert);
	const ASN1_INTEGER *X509_get0_authority_serial(cert); */
    }
 
    /* Signature algorithm and value */
    /* The signatureAlgorithm field contains the identifier for the cryptographic algorithm
	used by the CA to sign this certificate. The signatureValue field contains a digital
	signature computed upon the ASN.1 DER encoded tbsCertificate. */
    {
	const X509_ALGOR *sig_alg;
	const ASN1_BIT_STRING *sig;
	int sig_nid;

	X509_get0_signature(&sig, &sig_alg, cert);
	/* sig_nid = X509_get_signature_nid(cert) */
	sig_nid = OBJ_obj2nid(sig_alg->algorithm);

	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("signatureAlgorithm", -1));
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(OBJ_nid2ln(sig_nid),-1));

	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("signatureValue", -1));
	if (sig_nid != NID_undef) {
	    len = String_to_Hex(sig->data, sig->length, buffer, BUFSIZ);
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(buffer, len));
	} else {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("", -1));
	}
    }

    /* Key usage extension defines the purpose (e.g., encipherment, signature, certificate
	signing) of the key contained in the certificate. */
    {
	Tcl_Obj *purpPtr = Tcl_NewListObj(0, NULL);
	for (int j = 0; j < X509_PURPOSE_get_count(); j++) {
	    X509_PURPOSE *ptmp = X509_PURPOSE_get0(j);
	    Tcl_Obj *tmpPtr = Tcl_NewListObj(0, NULL);

	    for (int i = 0; i < 2; i++) {
		int idret = X509_check_purpose(cert, X509_PURPOSE_get_id(ptmp), i);
		Tcl_ListObjAppendElement(interp, tmpPtr, Tcl_NewStringObj(i ? "CA" : "nonCA", -1));
		Tcl_ListObjAppendElement(interp, tmpPtr, Tcl_NewStringObj(idret ? "Yes" : "No", -1));
	    }
	    Tcl_ListObjAppendElement(interp, purpPtr, Tcl_NewStringObj(X509_PURPOSE_get0_name(ptmp), -1));
	    Tcl_ListObjAppendElement(interp, purpPtr, tmpPtr);
	}
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("certificatePurpose", -1));
	Tcl_ListObjAppendElement(interp, certPtr, purpPtr);
    }

    /* Certificate Policies - indicates the issuing CA considers its issuerDomainPolicy
	equivalent to the subject CA's subjectDomainPolicy. */

    /* Subject Alternative Name (SAN) extension. Additional host names for a single SSL certificate. */
    /* Subject Alternative Name (SAN) extension. Additional URLs, DNS name, or IP addresses
	bound to certificate. */
    san = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
    if (san) {
	Tcl_Obj *namesPtr = Tcl_NewListObj(0, NULL);

	for (int i=0; i < sk_GENERAL_NAME_num(san); i++)         {
	    const GENERAL_NAME *name = sk_GENERAL_NAME_value(san, i);
	    size_t len2;
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	    }
	}
	sk_GENERAL_NAME_pop_free(san, GENERAL_NAME_free);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("subjectAltName", -1));
	Tcl_ListObjAppendElement(interp, certPtr, namesPtr);
    }

    /* Certificate Alias as UTF-8 string */
    /* Get the STACK of all crl distribution point entries for this certificate. */
    {
	unsigned char *bstring;
	len = 0;
    /* CRL_DIST_POINTS is typedef on STACK_OF(DIST_POINT). */
    crl = X509_get_ext_d2i(cert, NID_crl_distribution_points, NULL, NULL);
    if (crl) {
	bstring = X509_alias_get0(cert, &len);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("alias", -1));
	Tcl_Obj *namesPtr = Tcl_NewListObj(0, NULL);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj((char *)bstring, len));
    }


	for (int i=0; i < sk_GENERAL_NAME_num(crl); i++)         {
    /* Get Subject Key id, Authority Key id */
    {
	    const GENERAL_NAME *name = sk_GENERAL_NAME_value(crl, i);
	    size_t len2;

	ASN1_OCTET_STRING *astring;
	/* X509_keyid_get0 */
	astring = X509_get0_subject_key_id(cert);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("subjectKeyIdentifier", -1));
	if (astring != NULL) {
	    if (name) {
	    len = String_to_Hex((char *)ASN1_STRING_get0_data(astring), ASN1_STRING_length(astring), buffer, BUFSIZ);
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(buffer, len));
	} else {
		if (name->type == GEN_DNS) {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("", -1));
	}

		    char *dns_name;
	astring = X509_get0_authority_key_id(cert);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("authorityKeyIdentifier", -1));
	if (astring != NULL) {
	    len = String_to_Hex((char *)ASN1_STRING_get0_data(astring), ASN1_STRING_length(astring), buffer, BUFSIZ);
		    if ((len2 = ASN1_STRING_to_UTF8(&dns_name, name->d.dNSName)) > 0) {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(buffer, len));
	} else {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("", -1));
			Tcl_ListObjAppendElement(interp, namesPtr, Tcl_NewStringObj(dns_name, (int)len2));
	}
	
			OPENSSL_free (dns_name);
	/*  const GENERAL_NAMES *X509_get0_authority_issuer(cert);
	const ASN1_INTEGER *X509_get0_authority_serial(cert); */
    }

    /* Get OSCP URL */
		    }
		} else if (name->type == GEN_IPADD) {
		    /* name->d.iPAddress */
    {
	STACK_OF(OPENSSL_STRING) *str_stack = X509_get1_ocsp(cert);
	Tcl_Obj *urlsPtr = Tcl_NewListObj(0, NULL);

		}
	for (int i = 0; i < sk_OPENSSL_STRING_num(str_stack); i++) {
	    Tcl_ListObjAppendElement(interp, urlsPtr,
		Tcl_NewStringObj(sk_OPENSSL_STRING_value(str_stack, i), -1));
	}

	X509_email_free(str_stack);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("ocsp", -1));
	Tcl_ListObjAppendElement(interp, certPtr, urlsPtr);
	    }
	}
	sk_GENERAL_NAME_pop_free(crl, GENERAL_NAME_free);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("cRLDistributionPoints", -1));
	Tcl_ListObjAppendElement(interp, certPtr, namesPtr);
    }
 

    /* Signature algorithm and value */
    {

	const X509_ALGOR *sig_alg;
	const ASN1_BIT_STRING *sig;
	int sig_nid;

    /* Issuer Alternative Name */
	X509_get0_signature(&sig, &sig_alg, cert);
	/* sig_nid = X509_get_signature_nid(cert) */
	sig_nid = OBJ_obj2nid(sig_alg->algorithm);

    /* Subject Directory Attributes */
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("signatureAlgorithm", -1));
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(OBJ_nid2ln(sig_nid),-1));

	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("signatureValue", -1));
	if (sig_nid != NID_undef) {
	    len = String_to_Hex(sig->data, sig->length, buffer, BUFSIZ);
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(buffer, len));
	} else {
	    Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("", -1));
	}
    }

    /* Certificate purposes */
    {
    /* Basic Constraints - identifies whether the subject of the certificate is a CA and
	the maximum depth of valid certification paths that include this certificate. */

	Tcl_Obj *purpPtr = Tcl_NewListObj(0, NULL);
	for (int j = 0; j < X509_PURPOSE_get_count(); j++) {
	    X509_PURPOSE *ptmp = X509_PURPOSE_get0(j);
	    Tcl_Obj *tmpPtr = Tcl_NewListObj(0, NULL);
    /* Get OSCP URL */
    ocsp = X509_get1_ocsp(cert);
    if (ocsp) {
	Tcl_Obj *urlsPtr = Tcl_NewListObj(0, NULL);

	    for (int i = 0; i < 2; i++) {
	for (int i = 0; i < sk_OPENSSL_STRING_num(ocsp); i++) {
		int idret = X509_check_purpose(cert, X509_PURPOSE_get_id(ptmp), i);
		Tcl_ListObjAppendElement(interp, tmpPtr, Tcl_NewStringObj(i ? "CA" : "nonCA", -1));
		Tcl_ListObjAppendElement(interp, tmpPtr, Tcl_NewStringObj(idret ? "Yes" : "No", -1));
	    }
	    Tcl_ListObjAppendElement(interp, urlsPtr,
		Tcl_NewStringObj(sk_OPENSSL_STRING_value(ocsp, i), -1));
	}
	    Tcl_ListObjAppendElement(interp, purpPtr, Tcl_NewStringObj(X509_PURPOSE_get0_name(ptmp), -1));
	    Tcl_ListObjAppendElement(interp, purpPtr, tmpPtr);
	}
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("certificatePurpose", -1));
	Tcl_ListObjAppendElement(interp, certPtr, purpPtr);

	X509_email_free(ocsp);
	Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("ocsp", -1));
	Tcl_ListObjAppendElement(interp, certPtr, urlsPtr);
    }

    return certPtr;
}

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