r20640: Commit part 2/2

Update Heimdal to match current lorikeet-heimdal.  This includes
integrated PAC hooks, so Samba doesn't have to handle this any more.

This also brings in the PKINIT code, hence so many new files.

Andrew Bartlett
(This used to be commit 351f7040f7bb73b9a60b22b564686f7c2f98a729)

1 files changed, 893 insertions, 0 deletions

diff --git a/source4/heimdal/lib/hx509/ca.c b/source4/heimdal/lib/hx509/ca.c
new file mode 100644
index 0000000000..1a5b4947be
--- /dev/null
+++ b/source4/heimdal/lib/hx509/ca.c
@@ -0,0 +1,893 @@
+/*
+ * Copyright (c) 2006 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ *
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ */
+
+#include "hx_locl.h"
+#include <pkinit_asn1.h>
+RCSID("$Id: ca.c,v 1.12 2007/01/05 18:40:46 lha Exp $");
+
+struct hx509_ca_tbs {
+    hx509_name subject;
+    SubjectPublicKeyInfo spki;
+    ExtKeyUsage eku;
+    GeneralNames san;
+    unsigned key_usage;
+    heim_integer serial;
+    struct {
+	unsigned int proxy:1;
+	unsigned int ca:1;
+	unsigned int key:1;
+	unsigned int serial:1;
+    } flags;
+    time_t notBefore;
+    time_t notAfter;
+    int pathLenConstraint; /* both for CA and Proxy */
+};
+
+int
+hx509_ca_tbs_init(hx509_context context, hx509_ca_tbs *tbs)
+{
+    *tbs = calloc(1, sizeof(**tbs));
+    if (*tbs == NULL)
+	return ENOMEM;
+
+    (*tbs)->subject = NULL;
+    (*tbs)->san.len = 0;
+    (*tbs)->san.val = NULL;
+    (*tbs)->eku.len = 0;
+    (*tbs)->eku.val = NULL;
+    (*tbs)->pathLenConstraint = 0;
+
+    return 0;
+}
+
+void
+hx509_ca_tbs_free(hx509_ca_tbs *tbs)
+{
+    if (tbs == NULL || *tbs == NULL)
+	return;
+
+    free_SubjectPublicKeyInfo(&(*tbs)->spki);
+    free_GeneralNames(&(*tbs)->san);
+    free_ExtKeyUsage(&(*tbs)->eku);
+    der_free_heim_integer(&(*tbs)->serial);
+
+    hx509_name_free(&(*tbs)->subject);
+
+    memset(*tbs, 0, sizeof(**tbs));
+    free(*tbs);
+    *tbs = NULL;
+}
+
+int
+hx509_ca_tbs_set_notBefore(hx509_context context,
+			   hx509_ca_tbs tbs,
+			   time_t t)
+{
+    tbs->notBefore = t;
+    return 0;
+}
+
+int
+hx509_ca_tbs_set_notAfter(hx509_context context,
+			   hx509_ca_tbs tbs,
+			   time_t t)
+{
+    tbs->notAfter = t;
+    return 0;
+}
+
+int
+hx509_ca_tbs_set_notAfter_lifetime(hx509_context context,
+				   hx509_ca_tbs tbs,
+				   time_t delta)
+{
+    return hx509_ca_tbs_set_notAfter(context, tbs, time(NULL) + delta);
+}
+
+int
+hx509_ca_tbs_set_ca(hx509_context context,
+		    hx509_ca_tbs tbs,
+		    int pathLenConstraint)
+{
+    tbs->flags.ca = 1;
+    tbs->pathLenConstraint = pathLenConstraint;
+    return 0;
+}
+
+int
+hx509_ca_tbs_set_proxy(hx509_context context,
+		       hx509_ca_tbs tbs,
+		       int pathLenConstraint)
+{
+    tbs->flags.proxy = 1;
+    tbs->pathLenConstraint = pathLenConstraint;
+    return 0;
+}
+
+
+int
+hx509_ca_tbs_set_spki(hx509_context context,
+		      hx509_ca_tbs tbs,
+		      const SubjectPublicKeyInfo *spki)
+{
+    int ret;
+    free_SubjectPublicKeyInfo(&tbs->spki);
+    ret = copy_SubjectPublicKeyInfo(spki, &tbs->spki);
+    tbs->flags.key = !ret;
+    return ret;
+}
+
+int
+hx509_ca_tbs_set_serialnumber(hx509_context context,
+			      hx509_ca_tbs tbs,
+			      const heim_integer *serialNumber)
+{
+    int ret;
+    der_free_heim_integer(&tbs->serial);
+    ret = der_copy_heim_integer(serialNumber, &tbs->serial);
+    tbs->flags.serial = !ret;
+    return ret;
+}
+
+int
+hx509_ca_tbs_add_eku(hx509_context contex,
+		     hx509_ca_tbs tbs,
+		     const heim_oid *oid)
+{
+    void *ptr;
+    int ret;
+
+    ptr = realloc(tbs->eku.val, sizeof(tbs->eku.val[0]) * (tbs->eku.len + 1));
+    if (ptr == NULL)
+	return ENOMEM;
+    tbs->eku.val = ptr;
+    ret = der_copy_oid(oid, &tbs->eku.val[tbs->eku.len]);
+    if (ret)
+	return ret;
+    tbs->eku.len += 1;
+    return 0;
+}
+
+int
+hx509_ca_tbs_add_san_otherName(hx509_context context,
+			       hx509_ca_tbs tbs,
+			       const heim_oid *oid,
+			       const heim_octet_string *os)
+{
+    GeneralName gn;
+
+    memset(&gn, 0, sizeof(gn));
+    gn.element = choice_GeneralName_otherName;
+    gn.u.otherName.type_id = *oid;
+    gn.u.otherName.value = *os;
+    
+    return add_GeneralNames(&tbs->san, &gn);
+}
+
+
+int
+hx509_ca_tbs_add_san_pkinit(hx509_context context,
+			    hx509_ca_tbs tbs,
+			    const char *principal)
+{
+    heim_octet_string os;
+    KRB5PrincipalName p;
+    size_t size;
+    int ret;
+    char *s = NULL;
+
+    memset(&p, 0, sizeof(p));
+
+    /* parse principal */
+    {
+	const char *str;
+	char *q;
+	int n;
+	
+	/* count number of component */
+	n = 1;
+	for(str = principal; *str != '\0' && *str != '@'; str++){
+	    if(*str=='\\'){
+		if(str[1] == '\0' || str[1] == '@') {
+		    ret = HX509_PARSING_NAME_FAILED;
+		    hx509_set_error_string(context, 0, ret, 
+					   "trailing \\ in principal name");
+		    goto out;
+		}
+		str++;
+	    } else if(*str == '/')
+		n++;
+	}
+	p.principalName.name_string.val = 
+	    calloc(n, sizeof(*p.principalName.name_string.val));
+	if (p.principalName.name_string.val == NULL) {
+	    ret = ENOMEM;
+	    hx509_set_error_string(context, 0, ret, "malloc: out of memory");
+	    goto out;
+	}
+	p.principalName.name_string.len = n;
+	
+	p.principalName.name_type = KRB5_NT_PRINCIPAL;
+	q = s = strdup(principal);
+	if (q == NULL) {
+	    ret = ENOMEM;
+	    hx509_set_error_string(context, 0, ret, "malloc: out of memory");
+	    goto out;
+	}
+	p.realm = strrchr(q, '@');
+	if (p.realm == NULL) {
+	    ret = HX509_PARSING_NAME_FAILED;
+	    hx509_set_error_string(context, 0, ret, "Missing @ in principal");
+	    goto out;
+	};
+	*p.realm++ = '\0';
+
+	n = 0;
+	while (q) {
+	    p.principalName.name_string.val[n++] = q;
+	    q = strchr(q, '/');
+	    if (q)
+		*q++ = '\0';
+	}
+    }
+    
+    ASN1_MALLOC_ENCODE(KRB5PrincipalName, os.data, os.length, &p, &size, ret);
+    if (ret) {
+	hx509_set_error_string(context, 0, ret, "Out of memory");
+	goto out;
+    }
+    if (size != os.length)
+	_hx509_abort("internal ASN.1 encoder error");
+    
+    ret = hx509_ca_tbs_add_san_otherName(context,
+					 tbs,
+					 oid_id_pkinit_san(),
+					 &os);
+    free(os.data);
+out:
+    if (p.principalName.name_string.val)
+	free (p.principalName.name_string.val);
+    if (s)
+	free(s);
+    return ret;
+}
+    
+int
+hx509_ca_tbs_add_san_hostname(hx509_context context,
+			      hx509_ca_tbs tbs,
+			      const char *dnsname)
+{
+    GeneralName gn;
+
+    memset(&gn, 0, sizeof(gn));
+    gn.element = choice_GeneralName_dNSName;
+    gn.u.dNSName = rk_UNCONST(dnsname);
+    
+    return add_GeneralNames(&tbs->san, &gn);
+}
+
+int
+hx509_ca_tbs_add_san_rfc822name(hx509_context context,
+				hx509_ca_tbs tbs,
+				const char *rfc822Name)
+{
+    GeneralName gn;
+
+    memset(&gn, 0, sizeof(gn));
+    gn.element = choice_GeneralName_rfc822Name;
+    gn.u.rfc822Name = rk_UNCONST(rfc822Name);
+    
+    return add_GeneralNames(&tbs->san, &gn);
+}
+
+
+int
+hx509_ca_tbs_set_subject(hx509_context context,
+			 hx509_ca_tbs tbs,
+			 hx509_name subject)
+{
+    if (tbs->subject)
+	hx509_name_free(&tbs->subject);
+    return hx509_name_copy(context, subject, &tbs->subject);
+}
+
+static int
+add_extension(hx509_context context,
+	      TBSCertificate *tbsc,
+	      int critical_flag,
+	      const heim_oid *oid,
+	      const heim_octet_string *data)
+{
+    Extension ext;
+    int ret;
+
+    memset(&ext, 0, sizeof(ext));
+
+    if (critical_flag) {
+	ext.critical = malloc(sizeof(*ext.critical));
+	if (ext.critical == NULL) {
+	    ret = ENOMEM;
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+	*ext.critical = TRUE;
+    }
+
+    ret = der_copy_oid(oid, &ext.extnID);
+    if (ret) {
+	hx509_set_error_string(context, 0, ret, "Out of memory");
+	goto out;
+    }
+    ret = der_copy_octet_string(data, &ext.extnValue);
+    if (ret) {
+	hx509_set_error_string(context, 0, ret, "Out of memory");
+	goto out;
+    }
+    ret = add_Extensions(tbsc->extensions, &ext);
+    if (ret) {
+	hx509_set_error_string(context, 0, ret, "Out of memory");
+	goto out;
+    }
+out:
+    free_Extension(&ext);
+    return ret;
+}
+
+static int
+build_proxy_prefix(hx509_context context, const Name *issuer, Name *subject)
+{
+    char *tstr;
+    time_t t;
+    int ret;
+
+    ret = copy_Name(issuer, subject);
+    if (ret) {
+	hx509_set_error_string(context, 0, ret,
+			       "Failed to copy subject name");
+	return ret;
+    }
+
+    t = time(NULL);
+    asprintf(&tstr, "ts-%lu", (unsigned long)t);
+    if (tstr == NULL) {
+	hx509_set_error_string(context, 0, ENOMEM,
+			       "Failed to copy subject name");
+	return ENOMEM;
+    }
+    /* prefix with CN=<ts>,...*/
+    ret = _hx509_name_modify(context, subject, 1, oid_id_at_commonName(), tstr);
+    free(tstr);
+    if (ret)
+	free_Name(subject);
+    return ret;
+}
+
+static int
+ca_sign(hx509_context context,
+	hx509_ca_tbs tbs,
+	hx509_private_key signer,
+	const AuthorityKeyIdentifier *ai,
+	const Name *issuername,
+	hx509_cert *certificate)
+{
+    heim_octet_string data;
+    Certificate c;
+    TBSCertificate *tbsc;
+    size_t size;
+    int ret;
+    const AlgorithmIdentifier *sigalg;
+    time_t notBefore;
+    time_t notAfter;
+    unsigned key_usage;
+
+    sigalg = hx509_signature_rsa_with_sha1();
+
+    memset(&c, 0, sizeof(c));
+
+    /*
+     * Default values are: Valid since 24h ago, valid one year into
+     * the future, KeyUsage digitalSignature and keyEncipherment set,
+     * and keyCertSign for CA certificates.
+     */
+    notBefore = tbs->notBefore;
+    if (notBefore == 0)
+	notBefore = time(NULL) - 3600 * 24;
+    notAfter = tbs->notAfter;
+    if (notAfter == 0)
+	notAfter = time(NULL) + 3600 * 24 * 365;
+
+    key_usage = tbs->key_usage;
+    if (key_usage == 0) {
+	KeyUsage ku;
+	memset(&ku, 0, sizeof(ku));
+	ku.digitalSignature = 1;
+	ku.keyEncipherment = 1;
+	key_usage = KeyUsage2int(ku);
+    }
+
+    if (tbs->flags.ca) {
+	KeyUsage ku;
+	memset(&ku, 0, sizeof(ku));
+	ku.keyCertSign = 1;
+	key_usage |= KeyUsage2int(ku);
+    }
+
+    /*
+     *
+     */
+
+    tbsc = &c.tbsCertificate;
+
+    if (tbs->flags.key == 0) {
+	ret = EINVAL;
+	hx509_set_error_string(context, 0, ret, "No public key set");
+	return ret;
+    }
+    if (tbs->subject == NULL && !tbs->flags.proxy) {
+	ret = EINVAL;
+	hx509_set_error_string(context, 0, ret, "No subject name set");
+	return ret;
+    }
+    if (tbs->flags.ca && tbs->flags.proxy) {
+	ret = EINVAL;
+	hx509_set_error_string(context, 0, ret, "Can't be proxy and CA "
+			       "at the same time");
+	return ret;
+    }
+    if (tbs->flags.proxy) {
+	if (tbs->san.len > 0) {
+	    hx509_set_error_string(context, 0, EINVAL, 
+				   "Proxy certificate is not allowed "
+				   "to have SubjectAltNames");
+	    return EINVAL;
+	}
+    }
+
+    /* version         [0]  Version OPTIONAL, -- EXPLICIT nnn DEFAULT 1, */
+    tbsc->version = calloc(1, sizeof(*tbsc->version));
+    if (tbsc->version == NULL) {
+	ret = ENOMEM;
+	hx509_set_error_string(context, 0, ret, "Out of memory");
+	goto out;
+    }
+    *tbsc->version = rfc3280_version_3;
+    /* serialNumber         CertificateSerialNumber, */
+    if (tbs->flags.serial) {
+	ret = der_copy_heim_integer(&tbs->serial, &tbsc->serialNumber);
+	if (ret) {
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+    } else {
+	tbsc->serialNumber.length = 20;
+	tbsc->serialNumber.data = malloc(tbsc->serialNumber.length);
+	if (tbsc->serialNumber.data == NULL){
+	    ret = ENOMEM;
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+	/* XXX diffrent */
+	RAND_bytes(tbsc->serialNumber.data, tbsc->serialNumber.length);
+	((unsigned char *)tbsc->serialNumber.data)[0] &= 0x7f;
+    }
+    /* signature            AlgorithmIdentifier, */
+    ret = copy_AlgorithmIdentifier(sigalg, &tbsc->signature);
+    if (ret) {
+	hx509_set_error_string(context, 0, ret, "Failed to copy sigature alg");
+	goto out;
+    }
+    /* issuer               Name, */
+    if (issuername)
+	ret = copy_Name(issuername, &tbsc->issuer);
+    else
+	ret = hx509_name_to_Name(tbs->subject, &tbsc->issuer);
+    if (ret) {
+	hx509_set_error_string(context, 0, ret, "Failed to copy issuer name");
+	goto out;
+    }
+    /* validity             Validity, */
+    tbsc->validity.notBefore.element = choice_Time_generalTime;
+    tbsc->validity.notBefore.u.generalTime = notBefore;
+    tbsc->validity.notAfter.element = choice_Time_generalTime;
+    tbsc->validity.notAfter.u.generalTime = notAfter;
+    /* subject              Name, */
+    if (tbs->flags.proxy) {
+	ret = build_proxy_prefix(context, &tbsc->issuer, &tbsc->subject);
+	if (ret)
+	    goto out;
+    } else {
+	ret = hx509_name_to_Name(tbs->subject, &tbsc->subject);
+	if (ret) {
+	    hx509_set_error_string(context, 0, ret,
+				   "Failed to copy subject name");
+	    goto out;
+	}
+    }
+    /* subjectPublicKeyInfo SubjectPublicKeyInfo, */
+    ret = copy_SubjectPublicKeyInfo(&tbs->spki, &tbsc->subjectPublicKeyInfo);
+    if (ret) {
+	hx509_set_error_string(context, 0, ret, "Failed to copy spki");
+	goto out;
+    }
+    /* issuerUniqueID  [1]  IMPLICIT BIT STRING OPTIONAL */
+    /* subjectUniqueID [2]  IMPLICIT BIT STRING OPTIONAL */
+    /* extensions      [3]  EXPLICIT Extensions OPTIONAL */
+    tbsc->extensions = calloc(1, sizeof(*tbsc->extensions));
+    if (tbsc->extensions == NULL) {
+	ret = ENOMEM;
+	hx509_set_error_string(context, 0, ret, "Out of memory");
+	goto out;
+    }
+    
+    /* add KeyUsage */
+    {
+	KeyUsage ku;
+
+	ku = int2KeyUsage(key_usage);
+	ASN1_MALLOC_ENCODE(KeyUsage, data.data, data.length, &ku, &size, ret);
+	if (ret) {
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+	if (size != data.length)
+	    _hx509_abort("internal ASN.1 encoder error");
+	ret = add_extension(context, tbsc, 1, 
+			    oid_id_x509_ce_keyUsage(), &data);
+	free(data.data);
+	if (ret)
+	    goto out;
+    }
+
+    /* add ExtendedKeyUsage */
+    if (tbs->eku.len > 0) {
+	ASN1_MALLOC_ENCODE(ExtKeyUsage, data.data, data.length, 
+			   &tbs->eku, &size, ret);
+	if (ret) {
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+	if (size != data.length)
+	    _hx509_abort("internal ASN.1 encoder error");
+	ret = add_extension(context, tbsc, 0,
+			    oid_id_x509_ce_extKeyUsage(), &data);
+	free(data.data);
+	if (ret)
+	    goto out;
+    }
+
+    /* add Subject Alternative Name */
+    if (tbs->san.len > 0) {
+	ASN1_MALLOC_ENCODE(GeneralNames, data.data, data.length, 
+			   &tbs->san, &size, ret);
+	if (ret) {
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+	if (size != data.length)
+	    _hx509_abort("internal ASN.1 encoder error");
+	ret = add_extension(context, tbsc, 0,
+			    oid_id_x509_ce_subjectAltName(),
+			    &data);
+	free(data.data);
+	if (ret)
+	    goto out;
+    }
+
+    /* Add Authority Key Identifier */
+    if (ai) {
+	ASN1_MALLOC_ENCODE(AuthorityKeyIdentifier, data.data, data.length, 
+			   ai, &size, ret);
+	if (ret) {
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+	if (size != data.length)
+	    _hx509_abort("internal ASN.1 encoder error");
+	ret = add_extension(context, tbsc, 0,
+			    oid_id_x509_ce_authorityKeyIdentifier(),
+			    &data);
+	free(data.data);
+	if (ret)
+	    goto out;
+    }
+
+    /* Add Subject Key Identifier */
+    {
+	SubjectKeyIdentifier si;
+	unsigned char hash[SHA_DIGEST_LENGTH];
+
+	{
+	    SHA_CTX m;
+	    
+	    SHA1_Init(&m);
+	    SHA1_Update(&m, tbs->spki.subjectPublicKey.data,
+			tbs->spki.subjectPublicKey.length / 8);
+	    SHA1_Final (hash, &m);
+	}
+
+	si.data = hash;
+	si.length = sizeof(hash);
+
+	ASN1_MALLOC_ENCODE(SubjectKeyIdentifier, data.data, data.length, 
+			   &si, &size, ret);
+	if (ret) {
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+	if (size != data.length)
+	    _hx509_abort("internal ASN.1 encoder error");
+	ret = add_extension(context, tbsc, 0,
+			    oid_id_x509_ce_subjectKeyIdentifier(),
+			    &data);
+	free(data.data);
+	if (ret)
+	    goto out;
+    }
+
+    /* Add BasicConstraints */ 
+    {
+	BasicConstraints bc;
+	int aCA = 1;
+	uint32_t path;
+
+	memset(&bc, 0, sizeof(bc));
+
+	if (tbs->flags.ca) {
+	    bc.cA = &aCA;
+	    if (tbs->pathLenConstraint >= 0) {
+		path = tbs->pathLenConstraint;
+		bc.pathLenConstraint = &path;
+	    }
+	}
+
+	ASN1_MALLOC_ENCODE(BasicConstraints, data.data, data.length, 
+			   &bc, &size, ret);
+	if (ret) {
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+	if (size != data.length)
+	    _hx509_abort("internal ASN.1 encoder error");
+	ret = add_extension(context, tbsc, 0,
+			    oid_id_x509_ce_basicConstraints(),
+			    &data);
+	free(data.data);
+	if (ret)
+	    goto out;
+    }
+
+    /* add Proxy */
+    if (tbs->flags.proxy) {
+	ProxyCertInfo info;
+
+	memset(&info, 0, sizeof(info));
+
+	if (tbs->pathLenConstraint >= 0) {
+	    info.pCPathLenConstraint = 
+		malloc(sizeof(*info.pCPathLenConstraint));
+	    if (info.pCPathLenConstraint == NULL) {
+		ret = ENOMEM;
+		hx509_set_error_string(context, 0, ret, "Out of memory");
+		goto out;
+	    }
+	    *info.pCPathLenConstraint = tbs->pathLenConstraint;
+	}
+
+	ret = der_copy_oid(oid_id_pkix_ppl_inheritAll(),
+			   &info.proxyPolicy.policyLanguage);
+	if (ret) {
+	    free_ProxyCertInfo(&info);
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+
+	ASN1_MALLOC_ENCODE(ProxyCertInfo, data.data, data.length, 
+			   &info, &size, ret);
+	free_ProxyCertInfo(&info);
+	if (ret) {
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+	if (size != data.length)
+	    _hx509_abort("internal ASN.1 encoder error");
+	ret = add_extension(context, tbsc, 0,
+			    oid_id_pe_proxyCertInfo(),
+			    &data);
+	free(data.data);
+	if (ret)
+	    goto out;
+    }
+
+
+    ASN1_MALLOC_ENCODE(TBSCertificate, data.data, data.length,tbsc, &size, ret);
+    if (ret) {
+	hx509_set_error_string(context, 0, ret, "malloc out of memory");
+	goto out;
+    }
+    if (data.length != size)
+	_hx509_abort("internal ASN.1 encoder error");
+
+    ret = _hx509_create_signature_bitstring(context,
+					    signer,
+					    sigalg,
+					    &data,
+					    &c.signatureAlgorithm,
+					    &c.signatureValue);
+    free(data.data);
+    if (ret)
+	goto out;
+
+    ret = hx509_cert_init(context, &c, certificate);
+    if (ret)
+	goto out;
+
+    free_Certificate(&c);
+
+    return 0;
+
+out:
+    free_Certificate(&c);
+    return ret;
+}
+
+static int
+get_AuthorityKeyIdentifier(hx509_context context,
+			   const Certificate *certificate,
+			   AuthorityKeyIdentifier *ai)
+{
+    SubjectKeyIdentifier si;
+    int ret;
+
+    ret = _hx509_find_extension_subject_key_id(certificate, &si);
+    if (ret == 0) {
+	ai->keyIdentifier = calloc(1, sizeof(*ai->keyIdentifier));
+	if (ai->keyIdentifier == NULL) {
+	    ret = ENOMEM;
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+	ret = der_copy_octet_string(&si, ai->keyIdentifier);
+	if (ret) {
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+    } else {
+	GeneralNames gns;
+	GeneralName gn;
+	Name name;
+
+	memset(&gn, 0, sizeof(gn));
+	memset(&gns, 0, sizeof(gns));
+	memset(&name, 0, sizeof(name));
+
+	ai->authorityCertIssuer = 
+	    calloc(1, sizeof(*ai->authorityCertIssuer));
+	if (ai->authorityCertIssuer == NULL) {
+	    ret = ENOMEM;
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+	ai->authorityCertSerialNumber = 
+	    calloc(1, sizeof(*ai->authorityCertSerialNumber));
+	if (ai->authorityCertSerialNumber == NULL) {
+	    ret = ENOMEM;
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+
+	/* 
+	 * XXX unbreak when asn1 compiler handle IMPLICIT
+	 *
+	 * This is so horrible.
+	 */
+
+	ret = copy_Name(&certificate->tbsCertificate.subject, &name);
+	if (ai->authorityCertSerialNumber == NULL) {
+	    ret = ENOMEM;
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+
+	gn.element = choice_GeneralName_directoryName;
+	gn.u.directoryName.element = 
+	    choice_GeneralName_directoryName_rdnSequence;
+	gn.u.directoryName.u.rdnSequence = name.u.rdnSequence;
+
+	ret = add_GeneralNames(&gns, &gn);
+	if (ret) {
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+
+	ai->authorityCertIssuer->val = gns.val;
+	ai->authorityCertIssuer->len = gns.len;
+
+	ret = der_copy_heim_integer(&certificate->tbsCertificate.serialNumber,
+				    ai->authorityCertSerialNumber);
+	if (ai->authorityCertSerialNumber == NULL) {
+	    ret = ENOMEM;
+	    hx509_set_error_string(context, 0, ret, "Out of memory");
+	    goto out;
+	}
+    }
+out:
+    if (ret)
+	free_AuthorityKeyIdentifier(ai);
+    return ret;
+}
+
+
+int
+hx509_ca_sign(hx509_context context,
+	      hx509_ca_tbs tbs,
+	      hx509_cert signer,
+	      hx509_cert *certificate)
+{
+    const Certificate *signer_cert;
+    AuthorityKeyIdentifier ai;
+    int ret;
+
+    memset(&ai, 0, sizeof(ai));
+
+    signer_cert = _hx509_get_cert(signer);
+
+    ret = get_AuthorityKeyIdentifier(context, signer_cert, &ai);
+    if (ret)
+	goto out;
+
+    ret = ca_sign(context,
+		  tbs, 
+		  _hx509_cert_private_key(signer),
+		  &ai,
+		  &signer_cert->tbsCertificate.subject,
+		  certificate);
+
+out:
+    free_AuthorityKeyIdentifier(&ai);
+
+    return ret;
+}
+
+int
+hx509_ca_sign_self(hx509_context context,
+		   hx509_ca_tbs tbs,
+		   hx509_private_key signer,
+		   hx509_cert *certificate)
+{
+    return ca_sign(context,
+		   tbs, 
+		   signer,
+		   NULL,
+		   NULL,
+		   certificate);
+}