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|
#include <openssl/bio.h>
#include <openssl/sha.h>
#include <openssl/x509.h>
#include <openssl/x509v3.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 len, char *output, int size) {
int count = 0;
for (int i = 0; i < len && count < max - 1; i++, count += 2) {
for (int i = 0; i < len && count < size - 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;
}
/*
*------------------------------------------------------*
*
* 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
Tcl_Obj *certPtr = Tcl_NewListObj(0, NULL);
BIO *bio;
int n;
unsigned long flags;
Tcl_Obj *certPtr = Tcl_NewListObj(0, NULL), *listPtr;
BIO *bio = BIO_new(BIO_s_mem());
int mdnid, pknid, bits, len;
uint32_t xflags, usage;
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);
X509_get0_signature(&sig, &sig_alg, cert);
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 */
the subject public key field. RFC 5280 section 4.1.2.6 */
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));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj(OBJ_nid2ln(X509_get_signature_nid(cert)),-1));
X509_digest(cert, EVP_sha1(), sha1_hash_binary, &len);
len = String_to_Hex(sha1_hash_binary, len, buffer, BUFSIZ);
if (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));
X509_digest(cert, EVP_sha256(), sha256_hash_binary, &len);
len = String_to_Hex(sha256_hash_binary, len, buffer, BUFSIZ);
if (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));
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);
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);
}
/* 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);
/* Unique Ids */
/* The Unique Ids are used to handle the possibility of reuse of subject
and/or issuer names over time. RFC 5280 section 4.1.2.8 */
{
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));
}
}
/* Get extensions */
if (num_of_exts > 0) {
Tcl_Obj *extsPtr = Tcl_NewListObj(0, NULL);
const STACK_OF(X509_EXTENSION) *exts;
/* X509 v3 Extensions - RFC 5280 section 4.1.2.9 */
len = X509_get_ext_count(cert);
listPtr = Tcl_NewListObj(0, NULL);
if (len > 0) {
const STACK_OF(X509_EXTENSION) *exts = X509_get0_extensions(cert);
exts = X509_get0_extensions(cert);
for (int i=0; i < num_of_exts; i++) {
for (int i=0; i < len; 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. */
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;
char *purpose = NULL;
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));
}
/* 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));
Tcl_ListObjAppendElement(interp, certPtr, Tcl_NewStringObj("", -1));
}
LAPPEND_STR(interp, certPtr, "purpose", purpose, -1);
}
/* Get purposes */
listPtr = 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++) {
astring = X509_get0_authority_key_id(cert);
int idret = X509_check_purpose(cert, X509_PURPOSE_get_id(ptmp), i);
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 */
{
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);
/* sig_nid = X509_get_signature_nid(cert) */
sig_nid = OBJ_obj2nid(sig_alg->algorithm);
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) {
/* fullname 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) {
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));
}
Tcl_ListObjAppendElement(interp, listPtr,
Tcl_NewStringObj((char*)ASN1_STRING_get0_data(uri), ASN1_STRING_length(uri)));
}
}
} else if (distpoint->type == 1) {
/* relativename 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);
Tcl_ListObjAppendElement(interp, listPtr,
Tcl_NewStringObj((char*)ASN1_STRING_data(d), ASN1_STRING_length(d)));
}
}
}
CRL_DIST_POINTS_free(crl);
}
LAPPEND_LIST(interp, certPtr, "crlDistributionPoints", listPtr);
/* Freshest CRL extension */
if (xflags & EXFLAG_FRESHEST) {
}
/* Authority Information Access indicates how to access info and services
for the certificate issuer. RFC 5280 section 4.2.2.1, NID_info_access */
/* Get On-line Certificate Status Protocol (OSCP) URL */
listPtr = Tcl_NewListObj(0, NULL);
if (ocsp = X509_get1_ocsp(cert)) {
for (int i = 0; i < sk_OPENSSL_STRING_num(ocsp); i++) {
Tcl_ListObjAppendElement(interp, listPtr,
Tcl_NewStringObj(sk_OPENSSL_STRING_value(ocsp, i), -1));
}
X509_email_free(ocsp);
}
LAPPEND_LIST(interp, certPtr, "ocsp", listPtr);
/* CA Issuers URL caIssuers */
/* Subject Information Access - RFC 5280 section 4.2.2.2, NID_sinfo_access */
/* Certificate Alias. If uses a PKCS#12 structure, alias will reflect the
friendlyName attribute (RFC 2985). */
len = 0;
LAPPEND_STR(interp, certPtr, "alias", X509_alias_get0(cert, &len), len);
/* Certificate and dump all data */
{
char certStr[CERT_STR_SIZE];
/* Get certificate */
len = BIO_to_Buffer(PEM_write_bio_X509(bio, cert), bio, certStr, CERT_STR_SIZE);
LAPPEND_STR(interp, certPtr, "certificate", certStr, len);
/* Get all cert info */
len = BIO_to_Buffer(X509_print_ex(bio, cert, flags, 0), bio, certStr, CERT_STR_SIZE);
LAPPEND_STR(interp, certPtr, "all", certStr, len);
}
BIO_free(bio);
return certPtr;
}
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