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|
/*
* Copyright (C) 1997-2000 Sensus Consulting Ltd.
* Matt Newman <matt@sensus.org>
* Copyright (C) 2023 Brian O'Hagan
*/
#include <tcl.h>
#include <stdio.h>
#include <openssl/bio.h>
#include <openssl/sha.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/x509_vfy.h>
#include <openssl/asn1.h>
#include "tlsInt.h"
/*
* Ensure these are not macros - known to be defined on Win32
*/
#ifdef min
#undef min
#endif
#ifdef max
#undef max
#endif
static int min(int a, int b)
{
return (a < b) ? a : b;
}
static int max(int a, int b)
{
return (a > b) ? a : b;
}
/*
* ASN1_UTCTIME_tostr --
*/
static char *
ASN1_UTCTIME_tostr(ASN1_UTCTIME *tm)
{
static char bp[128];
char *v;
int gmt=0;
static char *mon[12]={
"Jan","Feb","Mar","Apr","May","Jun", "Jul","Aug","Sep","Oct","Nov","Dec"};
int i;
int y=0,M=0,d=0,h=0,m=0,s=0;
i=tm->length;
v=(char *)tm->data;
if (i < 10) goto err;
if (v[i-1] == 'Z') gmt=1;
for (i=0; i<10; i++)
if ((v[i] > '9') || (v[i] < '0')) goto err;
y= (v[0]-'0')*10+(v[1]-'0');
if (y < 70) y+=100;
M= (v[2]-'0')*10+(v[3]-'0');
if ((M > 12) || (M < 1)) goto err;
d= (v[4]-'0')*10+(v[5]-'0');
h= (v[6]-'0')*10+(v[7]-'0');
m= (v[8]-'0')*10+(v[9]-'0');
if ((v[10] >= '0') && (v[10] <= '9') && (v[11] >= '0') && (v[11] <= '9'))
s= (v[10]-'0')*10+(v[11]-'0');
sprintf(bp,"%s %2d %02d:%02d:%02d %d%s", mon[M-1],d,h,m,s,y+1900,(gmt)?" GMT":"");
return bp;
err:
return "Bad time value";
int String_to_Hex(char* input, int len, char *output, int max) {
int String_to_Hex(char* input, int ilen, char *output, int olen) {
int count = 0;
for (int i = 0; i < len && count < max - 1; i++, count += 2) {
for (int i = 0; i < ilen && count < olen - 1; i++, count += 2) {
sprintf(output + count, "%02X", input[i] & 0xff);
}
output[count] = 0;
return count;
}
/*
* BIO to Buffer
*/
int BIO_to_Buffer(int result, BIO *bio, void *buffer, int size) {
int len = 0;
int pending = BIO_pending(bio);
if (result) {
len = BIO_read(bio, buffer, (pending < size) ? pending : size);
(void)BIO_flush(bio);
if (len < 0) {
len = 0;
}
}
return len;
}
/*
* Get X509 Certificate Extensions
*/
Tcl_Obj *Tls_x509Extensions(Tcl_Interp *interp, X509 *cert) {
const STACK_OF(X509_EXTENSION) *exts;
Tcl_Obj *listPtr = Tcl_NewListObj(0, NULL);
if (listPtr == NULL) {
return NULL;
}
if (exts = X509_get0_extensions(cert)) {
for (int i=0; i < X509_get_ext_count(cert); i++) {
X509_EXTENSION *ex = sk_X509_EXTENSION_value(exts, i);
ASN1_OBJECT *obj = X509_EXTENSION_get_object(ex);
/* ASN1_OCTET_STRING *data = X509_EXTENSION_get_data(ex); */
int critical = X509_EXTENSION_get_critical(ex);
LAPPEND_BOOL(interp, listPtr, OBJ_nid2ln(OBJ_obj2nid(obj)), critical);
}
}
return listPtr;
}
/*
* Get Authority and Subject Key Identifiers
*/
Tcl_Obj *Tls_x509Identifier(ASN1_OCTET_STRING *astring) {
Tcl_Obj *resultPtr = NULL;
int len = 0;
char buffer[1024];
if (astring != NULL) {
len = String_to_Hex((char *)ASN1_STRING_get0_data(astring),
ASN1_STRING_length(astring), buffer, 1024);
}
resultPtr = Tcl_NewStringObj(buffer, len);
return resultPtr;
}
/*
* Get Key Usage
*/
Tcl_Obj *Tls_x509KeyUsage(Tcl_Interp *interp, X509 *cert, uint32_t xflags) {
uint32_t usage = X509_get_key_usage(cert);
Tcl_Obj *listPtr = Tcl_NewListObj(0, NULL);
if (listPtr == NULL) {
return NULL;
}
if ((xflags & EXFLAG_KUSAGE) && usage < UINT32_MAX) {
if (usage & KU_DIGITAL_SIGNATURE) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("Digital Signature", -1));
}
if (usage & KU_NON_REPUDIATION) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("Non-Repudiation", -1));
}
if (usage & KU_KEY_ENCIPHERMENT) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("Key Encipherment", -1));
}
if (usage & KU_DATA_ENCIPHERMENT) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("Data Encipherment", -1));
}
if (usage & KU_KEY_AGREEMENT) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("Key Agreement", -1));
}
if (usage & KU_KEY_CERT_SIGN) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("Certificate Signing", -1));
}
if (usage & KU_CRL_SIGN) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("CRL Signing", -1));
}
if (usage & KU_ENCIPHER_ONLY) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("Encipher Only", -1));
}
if (usage & KU_DECIPHER_ONLY) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("Decipher Only", -1));
}
} else {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("unrestricted", -1));
}
return listPtr;
}
/*
* Get Certificate Purpose
*/
char *Tls_x509Purpose(X509 *cert) {
char *purpose = NULL;
if (X509_check_purpose(cert, X509_PURPOSE_SSL_CLIENT, 0) > 0) {
purpose = "SSL Client";
} else if (X509_check_purpose(cert, X509_PURPOSE_SSL_SERVER, 0) > 0) {
purpose = "SSL Server";
} else if (X509_check_purpose(cert, X509_PURPOSE_NS_SSL_SERVER, 0) > 0) {
purpose = "MSS SSL Server";
} else if (X509_check_purpose(cert, X509_PURPOSE_SMIME_SIGN, 0) > 0) {
purpose = "SMIME Signing";
} else if (X509_check_purpose(cert, X509_PURPOSE_SMIME_ENCRYPT, 0) > 0) {
purpose = "SMIME Encryption";
} else if (X509_check_purpose(cert, X509_PURPOSE_CRL_SIGN, 0) > 0) {
purpose = "CRL Signing";
} else if (X509_check_purpose(cert, X509_PURPOSE_ANY, 0) > 0) {
purpose = "Any";
} else if (X509_check_purpose(cert, X509_PURPOSE_OCSP_HELPER, 0) > 0) {
purpose = "OCSP Helper";
} else if (X509_check_purpose(cert, X509_PURPOSE_TIMESTAMP_SIGN, 0) > 0) {
purpose = "Timestamp Signing";
} else {
purpose = "";
}
return purpose;
}
/*
* For each purpose, get certificate applicability
*/
Tcl_Obj *Tls_x509Purposes(Tcl_Interp *interp, X509 *cert) {
Tcl_Obj *listPtr = Tcl_NewListObj(0, NULL);
X509_PURPOSE *ptmp;
if (listPtr == NULL) {
return NULL;
}
for (int i = 0; i < X509_PURPOSE_get_count(); i++) {
ptmp = X509_PURPOSE_get0(i);
Tcl_Obj *tmpPtr = Tcl_NewListObj(0, NULL);
for (int j = 0; j < 2; j++) {
int idret = X509_check_purpose(cert, X509_PURPOSE_get_id(ptmp), j);
Tcl_ListObjAppendElement(interp, tmpPtr, Tcl_NewStringObj(j ? "CA" : "nonCA", -1));
Tcl_ListObjAppendElement(interp, tmpPtr, Tcl_NewStringObj(idret == 1 ? "Yes" : "No", -1));
}
LAPPEND_OBJ(interp, listPtr, X509_PURPOSE_get0_name(ptmp), tmpPtr);
}
return listPtr;
}
/*
* Get Subject Alternate Names (SAN) and Issuer Alternate Names
*/
Tcl_Obj *Tls_x509Names(Tcl_Interp *interp, X509 *cert, int nid, BIO *bio) {
STACK_OF(GENERAL_NAME) *names;
Tcl_Obj *listPtr = Tcl_NewListObj(0, NULL);
int len;
char buffer[1024];
if (listPtr == NULL) {
return NULL;
}
if (names = X509_get_ext_d2i(cert, nid, NULL, NULL)) {
for (int i=0; i < sk_GENERAL_NAME_num(names); i++) {
const GENERAL_NAME *name = sk_GENERAL_NAME_value(names, i);
len = BIO_to_Buffer(name && GENERAL_NAME_print(bio, name), bio, buffer, 1024);
LAPPEND_STR(interp, listPtr, NULL, buffer, len);
}
sk_GENERAL_NAME_pop_free(names, GENERAL_NAME_free);
}
return listPtr;
}
/*
* Get EXtended Key Usage
*/
Tcl_Obj *Tls_x509ExtKeyUsage(Tcl_Interp *interp, X509 *cert, uint32_t xflags) {
uint32_t usage = X509_get_key_usage(cert);
Tcl_Obj *listPtr = Tcl_NewListObj(0, NULL);
if (listPtr == NULL) {
return NULL;
}
if ((xflags & EXFLAG_XKUSAGE) && usage < UINT32_MAX) {
usage = X509_get_extended_key_usage(cert);
if (usage & XKU_SSL_SERVER) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("TLS Web Server Authentication", -1));
}
if (usage & XKU_SSL_CLIENT) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("TLS Web Client Authentication", -1));
}
if (usage & XKU_SMIME) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("E-mail Protection", -1));
}
if (usage & XKU_CODE_SIGN) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("Code Signing", -1));
}
if (usage & XKU_SGC) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("SGC", -1));
}
if (usage & XKU_OCSP_SIGN) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("OCSP Signing", -1));
}
if (usage & XKU_TIMESTAMP) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("Time Stamping", -1));
}
if (usage & XKU_DVCS ) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("DVCS", -1));
}
if (usage & XKU_ANYEKU) {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("Any Extended Key Usage", -1));
}
} else {
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj("unrestricted", -1));
}
return listPtr;
}
/*
* Get CRL Distribution Points
*/
Tcl_Obj *Tls_x509CrlDp(Tcl_Interp *interp, X509 *cert) {
STACK_OF(DIST_POINT) *crl;
Tcl_Obj *listPtr = Tcl_NewListObj(0, NULL);
if (listPtr == NULL) {
return NULL;
}
if (crl = X509_get_ext_d2i(cert, NID_crl_distribution_points, NULL, NULL)) {
for (int i=0; i < sk_DIST_POINT_num(crl); i++) {
DIST_POINT *dp = sk_DIST_POINT_value(crl, i);
DIST_POINT_NAME *distpoint = dp->distpoint;
if (distpoint->type == 0) {
/* full-name GENERALIZEDNAME */
for (int j = 0; j < sk_GENERAL_NAME_num(distpoint->name.fullname); j++) {
GENERAL_NAME *gen = sk_GENERAL_NAME_value(distpoint->name.fullname, j);
int type;
ASN1_STRING *uri = GENERAL_NAME_get0_value(gen, &type);
if (type == GEN_URI) {
LAPPEND_STR(interp, listPtr, NULL, ASN1_STRING_get0_data(uri), ASN1_STRING_length(uri));
}
}
} else if (distpoint->type == 1) {
/* relative-name X509NAME */
STACK_OF(X509_NAME_ENTRY) *sk_relname = distpoint->name.relativename;
for (int j = 0; j < sk_X509_NAME_ENTRY_num(sk_relname); j++) {
X509_NAME_ENTRY *e = sk_X509_NAME_ENTRY_value(sk_relname, j);
ASN1_STRING *d = X509_NAME_ENTRY_get_data(e);
LAPPEND_STR(interp, listPtr, NULL, ASN1_STRING_data(d), ASN1_STRING_length(d));
}
}
}
CRL_DIST_POINTS_free(crl);
}
return listPtr;
}
/*
* Get On-line Certificate Status Protocol (OSCP) URL
*/
Tcl_Obj *Tls_x509Oscp(Tcl_Interp *interp, X509 *cert) {
STACK_OF(OPENSSL_STRING) *ocsp;
Tcl_Obj *listPtr = Tcl_NewListObj(0, NULL);
if (listPtr == NULL) {
return NULL;
}
if (ocsp = X509_get1_ocsp(cert)) {
for (int i = 0; i < sk_OPENSSL_STRING_num(ocsp); i++) {
LAPPEND_STR(interp, listPtr, NULL, sk_OPENSSL_STRING_value(ocsp, i), -1);
}
X509_email_free(ocsp);
}
return listPtr;
}
/*
* Get Certificate Authority (CA) Issuers URL
*/
Tcl_Obj *Tls_x509CaIssuers(Tcl_Interp *interp, X509 *cert) {
STACK_OF(ACCESS_DESCRIPTION) *ads;
ACCESS_DESCRIPTION *ad;
Tcl_Obj *listPtr = Tcl_NewListObj(0, NULL);
unsigned char *buf;
int len;
if (ads = X509_get_ext_d2i(cert, NID_info_access, NULL, NULL)) {
for (int i = 0; i < sk_ACCESS_DESCRIPTION_num(ads); i++) {
ad = sk_ACCESS_DESCRIPTION_value(ads, i);
if (OBJ_obj2nid(ad->method) == NID_ad_ca_issuers && ad->location) {
if (ad->location->type == GEN_URI) {
len = ASN1_STRING_to_UTF8(&buf, ad->location->d.uniformResourceIdentifier);
Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj(buf, len));
OPENSSL_free(buf);
break;
}
}
}
/* sk_ACCESS_DESCRIPTION_pop_free(ads, ACCESS_DESCRIPTION_free); */
AUTHORITY_INFO_ACCESS_free(ads);
}
return listPtr;
}
/*
*------------------------------------------------------*
*
* Tls_NewX509Obj --
*
* ------------------------------------------------*
* Converts a X509 certificate into a Tcl_Obj
* ------------------------------------------------*
*
* Sideeffects:
* Side effects:
* None
*
* Result:
* A Tcl List Object representing the provided
* X509 certificate.
*
*------------------------------------------------------*
*/
#define CERT_STR_SIZE 32768
BIO *bio;
int n;
unsigned long flags;
BIO *bio = BIO_new(BIO_s_mem());
int mdnid, pknid, bits, len;
uint32_t xflags;
char subject[BUFSIZ];
char issuer[BUFSIZ];
char serial[BUFSIZ];
char notBefore[BUFSIZ];
char notAfter[BUFSIZ];
char certStr[CERT_STR_SIZE], *certStr_p;
int certStr_len, toRead;
unsigned char sha1_hash_binary[SHA_DIGEST_LENGTH];
unsigned char sha256_hash_binary[SHA256_DIGEST_LENGTH];
int nid, pknid, bits, num_of_exts, len;
uint32_t xflags;
STACK_OF(GENERAL_NAME) *san;
certStr[0] = 0;
if ((bio = BIO_new(BIO_s_mem())) == NULL) {
subject[0] = 0;
issuer[0] = 0;
serial[0] = 0;
} else {
flags = XN_FLAG_RFC2253 | ASN1_STRFLGS_UTF8_CONVERT;
flags &= ~ASN1_STRFLGS_ESC_MSB;
X509_NAME_print_ex(bio, X509_get_subject_name(cert), 0, flags);
n = BIO_read(bio, subject, min(BIO_pending(bio), BUFSIZ - 1));
n = max(n, 0);
subject[n] = 0;
(void)BIO_flush(bio);
X509_NAME_print_ex(bio, X509_get_issuer_name(cert), 0, flags);
n = BIO_read(bio, issuer, min(BIO_pending(bio), BUFSIZ - 1));
n = max(n, 0);
issuer[n] = 0;
(void)BIO_flush(bio);
i2a_ASN1_INTEGER(bio, X509_get0_serialNumber(cert));
n = BIO_read(bio, serial, min(BIO_pending(bio), BUFSIZ - 1));
n = max(n, 0);
serial[n] = 0;
(void)BIO_flush(bio);
/* Get certificate */
if (PEM_write_bio_X509(bio, cert)) {
certStr_p = certStr;
certStr_len = 0;
while (1) {
toRead = min(BIO_pending(bio), CERT_STR_SIZE - certStr_len - 1);
toRead = min(toRead, BUFSIZ);
if (toRead == 0) {
break;
}
dprintf("Reading %i bytes from the certificate...", toRead);
n = BIO_read(bio, certStr_p, toRead);
if (n <= 0) {
break;
}
certStr_len += n;
certStr_p += n;
}
*certStr_p = '\0';
(void)BIO_flush(bio);
}
/* All */
if (X509_print_ex(bio, cert, flags, 0)) {
char all[65536];
n = BIO_read(bio, all, min(BIO_pending(bio), 65535));
n = max(n, 0);
all[n] = 0;
(void)BIO_flush(bio);
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("all", -1));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(all, n));
}
BIO_free(bio);
}
strcpy(notBefore, ASN1_UTCTIME_tostr(X509_get0_notBefore(cert)));
strcpy(notAfter, ASN1_UTCTIME_tostr(X509_get0_notAfter(cert)));
/* Version */
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("version", -1));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewLongObj(X509_get_version(cert)+1));
/* Signature algorithm */
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("signature", -1));
/* Get Validity - Not After */
len = BIO_to_Buffer(ASN1_TIME_print(bio, X509_get0_notAfter(cert)), bio, buffer, BUFSIZ);
LAPPEND_STR(interp, certPtr, "notAfter", buffer, len);
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(), sha1_hash_binary, &len);
len = String_to_Hex(sha1_hash_binary, 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(), sha256_hash_binary, &len);
len = String_to_Hex(sha256_hash_binary, len, buffer, BUFSIZ);
/* SHA1 Digest (Fingerprint) of cert - DER representation */
if (X509_digest(cert, EVP_sha1(), 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));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("subject", -1));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(subject, -1));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("issuer", -1));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(issuer, -1));
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));
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 */
if (X509_get_signature_info(cert, &nid, &pknid, &bits, &xflags) == 1) {
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));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("bits", -1));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewIntObj(bits));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("extension_flags", -1));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewIntObj(xflags));
/* Public key - X509_get0_pubkey */
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("publicKey", -1));
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));
}
LAPPEND_STR(interp, certPtr, "publicKey", buffer, len);
len = 0;
if (X509_pubkey_digest(cert, EVP_get_digestbynid(pknid), md, &n)) {
len = String_to_Hex(md, (int)n, buffer, BUFSIZ);
}
LAPPEND_STR(interp, certPtr, "publicKeyHash", buffer, len);
/* digest of the DER representation of the certificate */
len = 0;
if (X509_digest(cert, EVP_get_digestbynid(mdnid), md, &n)) {
len = String_to_Hex(md, (int)n, buffer, BUFSIZ);
}
LAPPEND_STR(interp, certPtr, "signatureHash", buffer, len);
}
/* Certificate Purpose. Call before checking for extensions. */
LAPPEND_STR(interp, certPtr, "purpose", Tls_x509Purpose(cert), -1);
LAPPEND_OBJ(interp, certPtr, "certificatePurpose", Tls_x509Purposes(interp, cert));
/* Get extensions flags */
xflags = X509_get_extension_flags(cert);
LAPPEND_INT(interp, certPtr, "extFlags", xflags);
/* Check if cert was issued by CA cert issuer or self signed */
LAPPEND_BOOL(interp, certPtr, "selfIssued", xflags & EXFLAG_SI);
LAPPEND_BOOL(interp, certPtr, "selfSigned", xflags & EXFLAG_SS);
LAPPEND_BOOL(interp, certPtr, "isProxyCert", xflags & EXFLAG_PROXY);
LAPPEND_BOOL(interp, certPtr, "extInvalid", xflags & EXFLAG_INVALID);
LAPPEND_BOOL(interp, certPtr, "isCACert", X509_check_ca(cert));
/* Unique Ids */
/* Get extensions */
/* X509 v3 Extensions - RFC 5280 section 4.1.2.9 */
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);
}
/* Subject Alternative Name (SAN) extension. Additional host names for a single SSL certificate. */
/* Certificate Policies - indicates the issuing CA considers its issuerDomainPolicy
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;
if (name) {
if (name->type == GEN_DNS) {
char *dns_name;
if ((len2 = ASN1_STRING_to_UTF8(&dns_name, name->d.dNSName)) > 0) {
Tcl_ListObjAppendElement(interp, namesPtr, Tcl_NewStringObj(dns_name, (int)len2));
OPENSSL_free (dns_name);
}
} else if (name->type == GEN_IPADD) {
/* name->d.iPAddress */
}
}
}
sk_GENERAL_NAME_pop_free(san, GENERAL_NAME_free);
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("subjectAltName", -1));
Tcl_ListObjAppendElement(interp, certPtr, namesPtr);
}
/* Certificate Alias */
{
unsigned char *bstring;
len = 0;
bstring = X509_alias_get0(cert, &len);
len = String_to_Hex(bstring, len, buffer, BUFSIZ);
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("alias", -1));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(buffer, len));
LAPPEND_BOOL(interp, certPtr, "basicConstraintsCA", xflags & EXFLAG_CA);
/* Get Subject Key id, Authority Key id */
{
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_NewByteArrayObj(buffer, len));
} else {
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("", -1));
}
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_NewByteArrayObj(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); */
}
/* Get OSCP URL */
{
/* Get On-line Certificate Status Protocol (OSCP) Responders URL */
LAPPEND_OBJ(interp, certPtr, "ocspResponders", Tls_x509Oscp(interp, cert));
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);
/* Signature algorithm and value */
const X509_ALGOR *sig_alg;
const ASN1_BIT_STRING *sig;
int sig_nid;
X509_get0_signature(&sig, &sig_alg, cert);
/* Get certificate */
/* 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));
len = BIO_to_Buffer(X509_print_ex(bio, cert, flags, 0), bio, certStr, CERT_STR_SIZE);
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));
}
}
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