[thirdparty/openssl.git] / crypto / x509 / x_crl.c

/*
 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/x509.h>
#include "crypto/x509.h"
#include <openssl/x509v3.h>
#include "x509_local.h"

static int X509_REVOKED_cmp(const X509_REVOKED *const *a,
                            const X509_REVOKED *const *b);
static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp);

ASN1_SEQUENCE(X509_REVOKED) = {
        ASN1_EMBED(X509_REVOKED,serialNumber, ASN1_INTEGER),
        ASN1_SIMPLE(X509_REVOKED,revocationDate, ASN1_TIME),
        ASN1_SEQUENCE_OF_OPT(X509_REVOKED,extensions, X509_EXTENSION)
} ASN1_SEQUENCE_END(X509_REVOKED)

static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r);
static int def_crl_lookup(X509_CRL *crl,
                          X509_REVOKED **ret, ASN1_INTEGER *serial,
                          X509_NAME *issuer);

static X509_CRL_METHOD int_crl_meth = {
    0,
    0, 0,
    def_crl_lookup,
    def_crl_verify
};

static const X509_CRL_METHOD *default_crl_method = &int_crl_meth;

/*
 * The X509_CRL_INFO structure needs a bit of customisation. Since we cache
 * the original encoding the signature won't be affected by reordering of the
 * revoked field.
 */
static int crl_inf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
                      void *exarg)
{
    X509_CRL_INFO *a = (X509_CRL_INFO *)*pval;

    if (!a || !a->revoked)
        return 1;
    switch (operation) {
        /*
         * Just set cmp function here. We don't sort because that would
         * affect the output of X509_CRL_print().
         */
    case ASN1_OP_D2I_POST:
        (void)sk_X509_REVOKED_set_cmp_func(a->revoked, X509_REVOKED_cmp);
        break;
    }
    return 1;
}


ASN1_SEQUENCE_enc(X509_CRL_INFO, enc, crl_inf_cb) = {
        ASN1_OPT(X509_CRL_INFO, version, ASN1_INTEGER),
        ASN1_EMBED(X509_CRL_INFO, sig_alg, X509_ALGOR),
        ASN1_SIMPLE(X509_CRL_INFO, issuer, X509_NAME),
        ASN1_SIMPLE(X509_CRL_INFO, lastUpdate, ASN1_TIME),
        ASN1_OPT(X509_CRL_INFO, nextUpdate, ASN1_TIME),
        ASN1_SEQUENCE_OF_OPT(X509_CRL_INFO, revoked, X509_REVOKED),
        ASN1_EXP_SEQUENCE_OF_OPT(X509_CRL_INFO, extensions, X509_EXTENSION, 0)
} ASN1_SEQUENCE_END_enc(X509_CRL_INFO, X509_CRL_INFO)

/*
 * Set CRL entry issuer according to CRL certificate issuer extension. Check
 * for unhandled critical CRL entry extensions.
 */

static int crl_set_issuers(X509_CRL *crl)
{

    int i, j;
    GENERAL_NAMES *gens, *gtmp;
    STACK_OF(X509_REVOKED) *revoked;

    revoked = X509_CRL_get_REVOKED(crl);

    gens = NULL;
    for (i = 0; i < sk_X509_REVOKED_num(revoked); i++) {
        X509_REVOKED *rev = sk_X509_REVOKED_value(revoked, i);
        STACK_OF(X509_EXTENSION) *exts;
        ASN1_ENUMERATED *reason;
        X509_EXTENSION *ext;
        gtmp = X509_REVOKED_get_ext_d2i(rev,
                                        NID_certificate_issuer, &j, NULL);
        if (!gtmp && (j != -1)) {
            crl->flags |= EXFLAG_INVALID;
            return 1;
        }

        if (gtmp) {
            gens = gtmp;
            if (!crl->issuers) {
                crl->issuers = sk_GENERAL_NAMES_new_null();
                if (!crl->issuers)
                    return 0;
            }
            if (!sk_GENERAL_NAMES_push(crl->issuers, gtmp))
                return 0;
        }
        rev->issuer = gens;

        reason = X509_REVOKED_get_ext_d2i(rev, NID_crl_reason, &j, NULL);
        if (!reason && (j != -1)) {
            crl->flags |= EXFLAG_INVALID;
            return 1;
        }

        if (reason) {
            rev->reason = ASN1_ENUMERATED_get(reason);
            ASN1_ENUMERATED_free(reason);
        } else
            rev->reason = CRL_REASON_NONE;

        /* Check for critical CRL entry extensions */

        exts = rev->extensions;

        for (j = 0; j < sk_X509_EXTENSION_num(exts); j++) {
            ext = sk_X509_EXTENSION_value(exts, j);
            if (X509_EXTENSION_get_critical(ext)) {
                if (OBJ_obj2nid(X509_EXTENSION_get_object(ext)) == NID_certificate_issuer)
                    continue;
                crl->flags |= EXFLAG_CRITICAL;
                break;
            }
        }

    }

    return 1;

}

/*
 * The X509_CRL structure needs a bit of customisation. Cache some extensions
 * and hash of the whole CRL.
 */
static int crl_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
                  void *exarg)
{
    X509_CRL *crl = (X509_CRL *)*pval;
    STACK_OF(X509_EXTENSION) *exts;
    X509_EXTENSION *ext;
    int idx;

    switch (operation) {
    case ASN1_OP_D2I_PRE:
        if (crl->meth->crl_free) {
            if (!crl->meth->crl_free(crl))
                return 0;
        }
        AUTHORITY_KEYID_free(crl->akid);
        ISSUING_DIST_POINT_free(crl->idp);
        ASN1_INTEGER_free(crl->crl_number);
        ASN1_INTEGER_free(crl->base_crl_number);
        sk_GENERAL_NAMES_pop_free(crl->issuers, GENERAL_NAMES_free);
        /* fall thru */

    case ASN1_OP_NEW_POST:
        crl->idp = NULL;
        crl->akid = NULL;
        crl->flags = 0;
        crl->idp_flags = 0;
        crl->idp_reasons = CRLDP_ALL_REASONS;
        crl->meth = default_crl_method;
        crl->meth_data = NULL;
        crl->issuers = NULL;
        crl->crl_number = NULL;
        crl->base_crl_number = NULL;
        break;

    case ASN1_OP_D2I_POST:
        X509_CRL_digest(crl, EVP_sha1(), crl->sha1_hash, NULL);
        crl->idp = X509_CRL_get_ext_d2i(crl,
                                        NID_issuing_distribution_point, NULL,
                                        NULL);
        if (crl->idp)
            setup_idp(crl, crl->idp);

        crl->akid = X509_CRL_get_ext_d2i(crl,
                                         NID_authority_key_identifier, NULL,
                                         NULL);

        crl->crl_number = X509_CRL_get_ext_d2i(crl,
                                               NID_crl_number, NULL, NULL);

        crl->base_crl_number = X509_CRL_get_ext_d2i(crl,
                                                    NID_delta_crl, NULL,
                                                    NULL);
        /* Delta CRLs must have CRL number */
        if (crl->base_crl_number && !crl->crl_number)
            crl->flags |= EXFLAG_INVALID;

        /*
         * See if we have any unhandled critical CRL extensions and indicate
         * this in a flag. We only currently handle IDP so anything else
         * critical sets the flag. This code accesses the X509_CRL structure
         * directly: applications shouldn't do this.
         */

        exts = crl->crl.extensions;

        for (idx = 0; idx < sk_X509_EXTENSION_num(exts); idx++) {
            int nid;
            ext = sk_X509_EXTENSION_value(exts, idx);
            nid = OBJ_obj2nid(X509_EXTENSION_get_object(ext));
            if (nid == NID_freshest_crl)
                crl->flags |= EXFLAG_FRESHEST;
            if (X509_EXTENSION_get_critical(ext)) {
                /* We handle IDP and deltas */
                if ((nid == NID_issuing_distribution_point)
                    || (nid == NID_authority_key_identifier)
                    || (nid == NID_delta_crl))
                    continue;
                crl->flags |= EXFLAG_CRITICAL;
                break;
            }
        }

        if (!crl_set_issuers(crl))
            return 0;

        if (crl->meth->crl_init) {
            if (crl->meth->crl_init(crl) == 0)
                return 0;
        }

        crl->flags |= EXFLAG_SET;
        break;

    case ASN1_OP_FREE_POST:
        if (crl->meth->crl_free) {
            if (!crl->meth->crl_free(crl))
                return 0;
        }
        AUTHORITY_KEYID_free(crl->akid);
        ISSUING_DIST_POINT_free(crl->idp);
        ASN1_INTEGER_free(crl->crl_number);
        ASN1_INTEGER_free(crl->base_crl_number);
        sk_GENERAL_NAMES_pop_free(crl->issuers, GENERAL_NAMES_free);
        break;
    }
    return 1;
}

/* Convert IDP into a more convenient form */

static void setup_idp(X509_CRL *crl, ISSUING_DIST_POINT *idp)
{
    int idp_only = 0;
    /* Set various flags according to IDP */
    crl->idp_flags |= IDP_PRESENT;
    if (idp->onlyuser > 0) {
        idp_only++;
        crl->idp_flags |= IDP_ONLYUSER;
    }
    if (idp->onlyCA > 0) {
        idp_only++;
        crl->idp_flags |= IDP_ONLYCA;
    }
    if (idp->onlyattr > 0) {
        idp_only++;
        crl->idp_flags |= IDP_ONLYATTR;
    }

    if (idp_only > 1)
        crl->idp_flags |= IDP_INVALID;

    if (idp->indirectCRL > 0)
        crl->idp_flags |= IDP_INDIRECT;

    if (idp->onlysomereasons) {
        crl->idp_flags |= IDP_REASONS;
        if (idp->onlysomereasons->length > 0)
            crl->idp_reasons = idp->onlysomereasons->data[0];
        if (idp->onlysomereasons->length > 1)
            crl->idp_reasons |= (idp->onlysomereasons->data[1] << 8);
        crl->idp_reasons &= CRLDP_ALL_REASONS;
    }

    DIST_POINT_set_dpname(idp->distpoint, X509_CRL_get_issuer(crl));
}

ASN1_SEQUENCE_ref(X509_CRL, crl_cb) = {
        ASN1_EMBED(X509_CRL, crl, X509_CRL_INFO),
        ASN1_EMBED(X509_CRL, sig_alg, X509_ALGOR),
        ASN1_EMBED(X509_CRL, signature, ASN1_BIT_STRING)
} ASN1_SEQUENCE_END_ref(X509_CRL, X509_CRL)

IMPLEMENT_ASN1_FUNCTIONS(X509_REVOKED)

IMPLEMENT_ASN1_DUP_FUNCTION(X509_REVOKED)

IMPLEMENT_ASN1_FUNCTIONS(X509_CRL_INFO)

IMPLEMENT_ASN1_FUNCTIONS(X509_CRL)

IMPLEMENT_ASN1_DUP_FUNCTION(X509_CRL)

static int X509_REVOKED_cmp(const X509_REVOKED *const *a,
                            const X509_REVOKED *const *b)
{
    return (ASN1_STRING_cmp((ASN1_STRING *)&(*a)->serialNumber,
                            (ASN1_STRING *)&(*b)->serialNumber));
}

int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev)
{
    X509_CRL_INFO *inf;

    inf = &crl->crl;
    if (inf->revoked == NULL)
        inf->revoked = sk_X509_REVOKED_new(X509_REVOKED_cmp);
    if (inf->revoked == NULL || !sk_X509_REVOKED_push(inf->revoked, rev)) {
        ASN1err(ASN1_F_X509_CRL_ADD0_REVOKED, ERR_R_MALLOC_FAILURE);
        return 0;
    }
    inf->enc.modified = 1;
    return 1;
}

int X509_CRL_verify(X509_CRL *crl, EVP_PKEY *r)
{
    if (crl->meth->crl_verify)
        return crl->meth->crl_verify(crl, r);
    return 0;
}

int X509_CRL_get0_by_serial(X509_CRL *crl,
                            X509_REVOKED **ret, ASN1_INTEGER *serial)
{
    if (crl->meth->crl_lookup)
        return crl->meth->crl_lookup(crl, ret, serial, NULL);
    return 0;
}

int X509_CRL_get0_by_cert(X509_CRL *crl, X509_REVOKED **ret, X509 *x)
{
    if (crl->meth->crl_lookup)
        return crl->meth->crl_lookup(crl, ret,
                                     X509_get_serialNumber(x),
                                     X509_get_issuer_name(x));
    return 0;
}

static int def_crl_verify(X509_CRL *crl, EVP_PKEY *r)
{
    return (ASN1_item_verify(ASN1_ITEM_rptr(X509_CRL_INFO),
                             &crl->sig_alg, &crl->signature, &crl->crl, r));
}

static int crl_revoked_issuer_match(X509_CRL *crl, X509_NAME *nm,
                                    X509_REVOKED *rev)
{
    int i;

    if (!rev->issuer) {
        if (!nm)
            return 1;
        if (!X509_NAME_cmp(nm, X509_CRL_get_issuer(crl)))
            return 1;
        return 0;
    }

    if (!nm)
        nm = X509_CRL_get_issuer(crl);

    for (i = 0; i < sk_GENERAL_NAME_num(rev->issuer); i++) {
        GENERAL_NAME *gen = sk_GENERAL_NAME_value(rev->issuer, i);
        if (gen->type != GEN_DIRNAME)
            continue;
        if (!X509_NAME_cmp(nm, gen->d.directoryName))
            return 1;
    }
    return 0;

}

static int def_crl_lookup(X509_CRL *crl,
                          X509_REVOKED **ret, ASN1_INTEGER *serial,
                          X509_NAME *issuer)
{
    X509_REVOKED rtmp, *rev;
    int idx, num;

    if (crl->crl.revoked == NULL)
        return 0;

    /*
     * Sort revoked into serial number order if not already sorted. Do this
     * under a lock to avoid race condition.
     */
    if (!sk_X509_REVOKED_is_sorted(crl->crl.revoked)) {
        CRYPTO_THREAD_write_lock(crl->lock);
        sk_X509_REVOKED_sort(crl->crl.revoked);
        CRYPTO_THREAD_unlock(crl->lock);
    }
    rtmp.serialNumber = *serial;
    idx = sk_X509_REVOKED_find(crl->crl.revoked, &rtmp);
    if (idx < 0)
        return 0;
    /* Need to look for matching name */
    for (num = sk_X509_REVOKED_num(crl->crl.revoked); idx < num; idx++) {
        rev = sk_X509_REVOKED_value(crl->crl.revoked, idx);
        if (ASN1_INTEGER_cmp(&rev->serialNumber, serial))
            return 0;
        if (crl_revoked_issuer_match(crl, issuer, rev)) {
            if (ret)
                *ret = rev;
            if (rev->reason == CRL_REASON_REMOVE_FROM_CRL)
                return 2;
            return 1;
        }
    }
    return 0;
}

void X509_CRL_set_default_method(const X509_CRL_METHOD *meth)
{
    if (meth == NULL)
        default_crl_method = &int_crl_meth;
    else
        default_crl_method = meth;
}

X509_CRL_METHOD *X509_CRL_METHOD_new(int (*crl_init) (X509_CRL *crl),
                                     int (*crl_free) (X509_CRL *crl),
                                     int (*crl_lookup) (X509_CRL *crl,
                                                        X509_REVOKED **ret,
                                                        ASN1_INTEGER *ser,
                                                        X509_NAME *issuer),
                                     int (*crl_verify) (X509_CRL *crl,
                                                        EVP_PKEY *pk))
{
    X509_CRL_METHOD *m = OPENSSL_malloc(sizeof(*m));

    if (m == NULL) {
        X509err(X509_F_X509_CRL_METHOD_NEW, ERR_R_MALLOC_FAILURE);
        return NULL;
    }
    m->crl_init = crl_init;
    m->crl_free = crl_free;
    m->crl_lookup = crl_lookup;
    m->crl_verify = crl_verify;
    m->flags = X509_CRL_METHOD_DYNAMIC;
    return m;
}

void X509_CRL_METHOD_free(X509_CRL_METHOD *m)
{
    if (m == NULL || !(m->flags & X509_CRL_METHOD_DYNAMIC))
        return;
    OPENSSL_free(m);
}

void X509_CRL_set_meth_data(X509_CRL *crl, void *dat)
{
    crl->meth_data = dat;
}

void *X509_CRL_get_meth_data(X509_CRL *crl)
{
    return crl->meth_data;
}
Commit	Line	Data
b1322259	1	/*
6ec5fce2	2	* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
d02b48c6	3	*
3e4b43b9	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
b1322259 RS	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
d02b48c6 RE	8	*/
	9
	10	#include <stdio.h>
b39fc560	11	#include "internal/cryptlib.h"
9d6b1ce6	12	#include <openssl/asn1t.h>
ec577822	13	#include <openssl/x509.h>
25f2138b	14	#include "crypto/x509.h"
edc54021	15	#include <openssl/x509v3.h>
706457b7	16	#include "x509_local.h"
d02b48c6	17
0f113f3e MC	18	static int X509_REVOKED_cmp(const X509_REVOKED const a,
0f113f3e MC	19	const X509_REVOKED const b);
4d50a2b4	20	static void setup_idp(X509_CRL crl, ISSUING_DIST_POINT idp);
d02b48c6	21
9d6b1ce6	22	ASN1_SEQUENCE(X509_REVOKED) = {
34a42e14	23	ASN1_EMBED(X509_REVOKED,serialNumber, ASN1_INTEGER),
0f113f3e MC	24	ASN1_SIMPLE(X509_REVOKED,revocationDate, ASN1_TIME),
0f113f3e MC	25	ASN1_SEQUENCE_OF_OPT(X509_REVOKED,extensions, X509_EXTENSION)
d339187b	26	} ASN1_SEQUENCE_END(X509_REVOKED)
9d6b1ce6	27
f4c630ab DSH	28	static int def_crl_verify(X509_CRL crl, EVP_PKEY r);
f4c630ab DSH	29	static int def_crl_lookup(X509_CRL *crl,
0f113f3e MC	30	X509_REVOKED *ret, ASN1_INTEGER serial,
0f113f3e MC	31	X509_NAME *issuer);
f4c630ab	32
0f113f3e MC	33	static X509_CRL_METHOD int_crl_meth = {
	34	0,
	35	0, 0,
	36	def_crl_lookup,
	37	def_crl_verify
	38	};
f4c630ab DSH	39
	40	static const X509_CRL_METHOD *default_crl_method = &int_crl_meth;
	41
0f113f3e MC	42	/*
0f113f3e MC	43	* The X509_CRL_INFO structure needs a bit of customisation. Since we cache
60250017	44	* the original encoding the signature won't be affected by reordering of the
0f113f3e	45	* revoked field.
9d6b1ce6	46	*/
24484759	47	static int crl_inf_cb(int operation, ASN1_VALUE *pval, const ASN1_ITEM it,
0f113f3e	48	void *exarg)
9d6b1ce6	49	{
0f113f3e MC	50	X509_CRL_INFO a = (X509_CRL_INFO )*pval;
	51
	52	if (!a \|\| !a->revoked)
	53	return 1;
	54	switch (operation) {
	55	/*
	56	* Just set cmp function here. We don't sort because that would
	57	* affect the output of X509_CRL_print().
	58	*/
	59	case ASN1_OP_D2I_POST:
	60	(void)sk_X509_REVOKED_set_cmp_func(a->revoked, X509_REVOKED_cmp);
	61	break;
	62	}
	63	return 1;
9d6b1ce6 DSH	64	}
	65
	66
2f605e8d	67	ASN1_SEQUENCE_enc(X509_CRL_INFO, enc, crl_inf_cb) = {
0f113f3e	68	ASN1_OPT(X509_CRL_INFO, version, ASN1_INTEGER),
6e63c142	69	ASN1_EMBED(X509_CRL_INFO, sig_alg, X509_ALGOR),
0f113f3e MC	70	ASN1_SIMPLE(X509_CRL_INFO, issuer, X509_NAME),
	71	ASN1_SIMPLE(X509_CRL_INFO, lastUpdate, ASN1_TIME),
	72	ASN1_OPT(X509_CRL_INFO, nextUpdate, ASN1_TIME),
	73	ASN1_SEQUENCE_OF_OPT(X509_CRL_INFO, revoked, X509_REVOKED),
	74	ASN1_EXP_SEQUENCE_OF_OPT(X509_CRL_INFO, extensions, X509_EXTENSION, 0)
2f605e8d	75	} ASN1_SEQUENCE_END_enc(X509_CRL_INFO, X509_CRL_INFO)
9d6b1ce6	76
0f113f3e MC	77	/*
	78	* Set CRL entry issuer according to CRL certificate issuer extension. Check
	79	* for unhandled critical CRL entry extensions.
d0fff69d DSH	80	*/
	81
	82	static int crl_set_issuers(X509_CRL *crl)
0f113f3e MC	83	{
	84
	85	int i, j;
	86	GENERAL_NAMES gens, gtmp;
	87	STACK_OF(X509_REVOKED) *revoked;
	88
	89	revoked = X509_CRL_get_REVOKED(crl);
	90
	91	gens = NULL;
	92	for (i = 0; i < sk_X509_REVOKED_num(revoked); i++) {
	93	X509_REVOKED *rev = sk_X509_REVOKED_value(revoked, i);
	94	STACK_OF(X509_EXTENSION) *exts;
	95	ASN1_ENUMERATED *reason;
	96	X509_EXTENSION *ext;
	97	gtmp = X509_REVOKED_get_ext_d2i(rev,
	98	NID_certificate_issuer, &j, NULL);
	99	if (!gtmp && (j != -1)) {
	100	crl->flags \|= EXFLAG_INVALID;
	101	return 1;
	102	}
	103
	104	if (gtmp) {
	105	gens = gtmp;
	106	if (!crl->issuers) {
	107	crl->issuers = sk_GENERAL_NAMES_new_null();
	108	if (!crl->issuers)
	109	return 0;
	110	}
	111	if (!sk_GENERAL_NAMES_push(crl->issuers, gtmp))
	112	return 0;
	113	}
	114	rev->issuer = gens;
	115
	116	reason = X509_REVOKED_get_ext_d2i(rev, NID_crl_reason, &j, NULL);
	117	if (!reason && (j != -1)) {
	118	crl->flags \|= EXFLAG_INVALID;
	119	return 1;
	120	}
	121
	122	if (reason) {
	123	rev->reason = ASN1_ENUMERATED_get(reason);
	124	ASN1_ENUMERATED_free(reason);
	125	} else
	126	rev->reason = CRL_REASON_NONE;
	127
	128	/* Check for critical CRL entry extensions */
	129
	130	exts = rev->extensions;
	131
	132	for (j = 0; j < sk_X509_EXTENSION_num(exts); j++) {
	133	ext = sk_X509_EXTENSION_value(exts, j);
4903abd5 DSH	134	if (X509_EXTENSION_get_critical(ext)) {
4903abd5 DSH	135	if (OBJ_obj2nid(X509_EXTENSION_get_object(ext)) == NID_certificate_issuer)
0f113f3e MC	136	continue;
	137	crl->flags \|= EXFLAG_CRITICAL;
	138	break;
	139	}
	140	}
	141
	142	}
	143
	144	return 1;
	145
	146	}
	147
	148	/*
	149	* The X509_CRL structure needs a bit of customisation. Cache some extensions
edc54021 DSH	150	* and hash of the whole CRL.
	151	*/
	152	static int crl_cb(int operation, ASN1_VALUE *pval, const ASN1_ITEM it,
0f113f3e MC	153	void *exarg)
	154	{
	155	X509_CRL crl = (X509_CRL )*pval;
	156	STACK_OF(X509_EXTENSION) *exts;
	157	X509_EXTENSION *ext;
	158	int idx;
	159
	160	switch (operation) {
a7276279 BE	161	case ASN1_OP_D2I_PRE:
	162	if (crl->meth->crl_free) {
	163	if (!crl->meth->crl_free(crl))
	164	return 0;
	165	}
	166	AUTHORITY_KEYID_free(crl->akid);
	167	ISSUING_DIST_POINT_free(crl->idp);
	168	ASN1_INTEGER_free(crl->crl_number);
	169	ASN1_INTEGER_free(crl->base_crl_number);
	170	sk_GENERAL_NAMES_pop_free(crl->issuers, GENERAL_NAMES_free);
	171	/* fall thru */
	172
0f113f3e MC	173	case ASN1_OP_NEW_POST:
	174	crl->idp = NULL;
	175	crl->akid = NULL;
	176	crl->flags = 0;
	177	crl->idp_flags = 0;
	178	crl->idp_reasons = CRLDP_ALL_REASONS;
	179	crl->meth = default_crl_method;
	180	crl->meth_data = NULL;
	181	crl->issuers = NULL;
	182	crl->crl_number = NULL;
	183	crl->base_crl_number = NULL;
	184	break;
	185
	186	case ASN1_OP_D2I_POST:
0f113f3e	187	X509_CRL_digest(crl, EVP_sha1(), crl->sha1_hash, NULL);
0f113f3e MC	188	crl->idp = X509_CRL_get_ext_d2i(crl,
	189	NID_issuing_distribution_point, NULL,
	190	NULL);
	191	if (crl->idp)
	192	setup_idp(crl, crl->idp);
	193
	194	crl->akid = X509_CRL_get_ext_d2i(crl,
	195	NID_authority_key_identifier, NULL,
	196	NULL);
	197
	198	crl->crl_number = X509_CRL_get_ext_d2i(crl,
	199	NID_crl_number, NULL, NULL);
	200
	201	crl->base_crl_number = X509_CRL_get_ext_d2i(crl,
	202	NID_delta_crl, NULL,
	203	NULL);
	204	/* Delta CRLs must have CRL number */
	205	if (crl->base_crl_number && !crl->crl_number)
	206	crl->flags \|= EXFLAG_INVALID;
	207
	208	/*
	209	* See if we have any unhandled critical CRL extensions and indicate
	210	* this in a flag. We only currently handle IDP so anything else
	211	* critical sets the flag. This code accesses the X509_CRL structure
	212	* directly: applications shouldn't do this.
	213	*/
	214
7aef39a7	215	exts = crl->crl.extensions;
0f113f3e MC	216
	217	for (idx = 0; idx < sk_X509_EXTENSION_num(exts); idx++) {
	218	int nid;
	219	ext = sk_X509_EXTENSION_value(exts, idx);
4903abd5	220	nid = OBJ_obj2nid(X509_EXTENSION_get_object(ext));
0f113f3e MC	221	if (nid == NID_freshest_crl)
0f113f3e MC	222	crl->flags \|= EXFLAG_FRESHEST;
4903abd5	223	if (X509_EXTENSION_get_critical(ext)) {
0f113f3e MC	224	/* We handle IDP and deltas */
	225	if ((nid == NID_issuing_distribution_point)
	226	\|\| (nid == NID_authority_key_identifier)
	227	\|\| (nid == NID_delta_crl))
2b406990	228	continue;
0f113f3e MC	229	crl->flags \|= EXFLAG_CRITICAL;
	230	break;
	231	}
	232	}
	233
	234	if (!crl_set_issuers(crl))
	235	return 0;
	236
	237	if (crl->meth->crl_init) {
	238	if (crl->meth->crl_init(crl) == 0)
	239	return 0;
	240	}
6195848b RL	241
6195848b RL	242	crl->flags \|= EXFLAG_SET;
0f113f3e MC	243	break;
	244
	245	case ASN1_OP_FREE_POST:
	246	if (crl->meth->crl_free) {
	247	if (!crl->meth->crl_free(crl))
	248	return 0;
	249	}
25aaa98a RS	250	AUTHORITY_KEYID_free(crl->akid);
25aaa98a RS	251	ISSUING_DIST_POINT_free(crl->idp);
0f113f3e MC	252	ASN1_INTEGER_free(crl->crl_number);
	253	ASN1_INTEGER_free(crl->base_crl_number);
	254	sk_GENERAL_NAMES_pop_free(crl->issuers, GENERAL_NAMES_free);
	255	break;
	256	}
	257	return 1;
	258	}
edc54021	259
4d50a2b4 DSH	260	/* Convert IDP into a more convenient form */
	261
	262	static void setup_idp(X509_CRL crl, ISSUING_DIST_POINT idp)
0f113f3e MC	263	{
	264	int idp_only = 0;
	265	/* Set various flags according to IDP */
	266	crl->idp_flags \|= IDP_PRESENT;
	267	if (idp->onlyuser > 0) {
	268	idp_only++;
	269	crl->idp_flags \|= IDP_ONLYUSER;
	270	}
	271	if (idp->onlyCA > 0) {
	272	idp_only++;
	273	crl->idp_flags \|= IDP_ONLYCA;
	274	}
	275	if (idp->onlyattr > 0) {
	276	idp_only++;
	277	crl->idp_flags \|= IDP_ONLYATTR;
	278	}
	279
	280	if (idp_only > 1)
	281	crl->idp_flags \|= IDP_INVALID;
	282
	283	if (idp->indirectCRL > 0)
	284	crl->idp_flags \|= IDP_INDIRECT;
	285
	286	if (idp->onlysomereasons) {
	287	crl->idp_flags \|= IDP_REASONS;
	288	if (idp->onlysomereasons->length > 0)
	289	crl->idp_reasons = idp->onlysomereasons->data[0];
	290	if (idp->onlysomereasons->length > 1)
	291	crl->idp_reasons \|= (idp->onlysomereasons->data[1] << 8);
	292	crl->idp_reasons &= CRLDP_ALL_REASONS;
	293	}
	294
	295	DIST_POINT_set_dpname(idp->distpoint, X509_CRL_get_issuer(crl));
	296	}
4d50a2b4	297
c001ce33	298	ASN1_SEQUENCE_ref(X509_CRL, crl_cb) = {
7aef39a7	299	ASN1_EMBED(X509_CRL, crl, X509_CRL_INFO),
6e63c142	300	ASN1_EMBED(X509_CRL, sig_alg, X509_ALGOR),
34a42e14	301	ASN1_EMBED(X509_CRL, signature, ASN1_BIT_STRING)
d339187b	302	} ASN1_SEQUENCE_END_ref(X509_CRL, X509_CRL)
9d6b1ce6 DSH	303
9d6b1ce6 DSH	304	IMPLEMENT_ASN1_FUNCTIONS(X509_REVOKED)
0f113f3e	305
2e8cb108	306	IMPLEMENT_ASN1_DUP_FUNCTION(X509_REVOKED)
0f113f3e	307
9d6b1ce6	308	IMPLEMENT_ASN1_FUNCTIONS(X509_CRL_INFO)
739a5eee	309
9d6b1ce6	310	IMPLEMENT_ASN1_FUNCTIONS(X509_CRL)
739a5eee	311
1241126a	312	IMPLEMENT_ASN1_DUP_FUNCTION(X509_CRL)
d02b48c6	313
0f113f3e MC	314	static int X509_REVOKED_cmp(const X509_REVOKED const a,
	315	const X509_REVOKED const b)
	316	{
34a42e14 DSH	317	return (ASN1_STRING_cmp((ASN1_STRING )&(a)->serialNumber,
34a42e14 DSH	318	(ASN1_STRING )&(b)->serialNumber));
0f113f3e	319	}
d02b48c6	320
9d6b1ce6 DSH	321	int X509_CRL_add0_revoked(X509_CRL crl, X509_REVOKED rev)
9d6b1ce6 DSH	322	{
0f113f3e	323	X509_CRL_INFO *inf;
7fcdbd83	324
7aef39a7	325	inf = &crl->crl;
90945fa3	326	if (inf->revoked == NULL)
0f113f3e	327	inf->revoked = sk_X509_REVOKED_new(X509_REVOKED_cmp);
90945fa3	328	if (inf->revoked == NULL \|\| !sk_X509_REVOKED_push(inf->revoked, rev)) {
0f113f3e MC	329	ASN1err(ASN1_F_X509_CRL_ADD0_REVOKED, ERR_R_MALLOC_FAILURE);
	330	return 0;
	331	}
	332	inf->enc.modified = 1;
	333	return 1;
9d6b1ce6 DSH	334	}
9d6b1ce6 DSH	335
010fa0b3	336	int X509_CRL_verify(X509_CRL crl, EVP_PKEY r)
0f113f3e MC	337	{
	338	if (crl->meth->crl_verify)
	339	return crl->meth->crl_verify(crl, r);
	340	return 0;
	341	}
f4c630ab DSH	342
f4c630ab DSH	343	int X509_CRL_get0_by_serial(X509_CRL *crl,
0f113f3e MC	344	X509_REVOKED *ret, ASN1_INTEGER serial)
	345	{
	346	if (crl->meth->crl_lookup)
	347	return crl->meth->crl_lookup(crl, ret, serial, NULL);
	348	return 0;
	349	}
d0fff69d DSH	350
d0fff69d DSH	351	int X509_CRL_get0_by_cert(X509_CRL crl, X509_REVOKED ret, X509 x)
0f113f3e MC	352	{
	353	if (crl->meth->crl_lookup)
	354	return crl->meth->crl_lookup(crl, ret,
	355	X509_get_serialNumber(x),
	356	X509_get_issuer_name(x));
	357	return 0;
	358	}
f4c630ab DSH	359
f4c630ab DSH	360	static int def_crl_verify(X509_CRL crl, EVP_PKEY r)
0f113f3e MC	361	{
0f113f3e MC	362	return (ASN1_item_verify(ASN1_ITEM_rptr(X509_CRL_INFO),
34a42e14	363	&crl->sig_alg, &crl->signature, &crl->crl, r));
0f113f3e	364	}
010fa0b3	365
d0fff69d	366	static int crl_revoked_issuer_match(X509_CRL crl, X509_NAME nm,
0f113f3e MC	367	X509_REVOKED *rev)
	368	{
	369	int i;
	370
	371	if (!rev->issuer) {
	372	if (!nm)
	373	return 1;
	374	if (!X509_NAME_cmp(nm, X509_CRL_get_issuer(crl)))
	375	return 1;
	376	return 0;
	377	}
	378
	379	if (!nm)
	380	nm = X509_CRL_get_issuer(crl);
	381
	382	for (i = 0; i < sk_GENERAL_NAME_num(rev->issuer); i++) {
	383	GENERAL_NAME *gen = sk_GENERAL_NAME_value(rev->issuer, i);
	384	if (gen->type != GEN_DIRNAME)
	385	continue;
	386	if (!X509_NAME_cmp(nm, gen->d.directoryName))
	387	return 1;
	388	}
	389	return 0;
	390
	391	}
d0fff69d	392
f4c630ab	393	static int def_crl_lookup(X509_CRL *crl,
0f113f3e MC	394	X509_REVOKED *ret, ASN1_INTEGER serial,
	395	X509_NAME *issuer)
	396	{
	397	X509_REVOKED rtmp, *rev;
5b37fef0 AP	398	int idx, num;
	399
	400	if (crl->crl.revoked == NULL)
	401	return 0;
	402
0f113f3e MC	403	/*
	404	* Sort revoked into serial number order if not already sorted. Do this
	405	* under a lock to avoid race condition.
	406	*/
7aef39a7	407	if (!sk_X509_REVOKED_is_sorted(crl->crl.revoked)) {
c001ce33	408	CRYPTO_THREAD_write_lock(crl->lock);
7aef39a7	409	sk_X509_REVOKED_sort(crl->crl.revoked);
c001ce33	410	CRYPTO_THREAD_unlock(crl->lock);
0f113f3e	411	}
5b37fef0	412	rtmp.serialNumber = *serial;
7aef39a7	413	idx = sk_X509_REVOKED_find(crl->crl.revoked, &rtmp);
0f113f3e MC	414	if (idx < 0)
	415	return 0;
	416	/* Need to look for matching name */
5b37fef0	417	for (num = sk_X509_REVOKED_num(crl->crl.revoked); idx < num; idx++) {
7aef39a7	418	rev = sk_X509_REVOKED_value(crl->crl.revoked, idx);
34a42e14	419	if (ASN1_INTEGER_cmp(&rev->serialNumber, serial))
0f113f3e MC	420	return 0;
	421	if (crl_revoked_issuer_match(crl, issuer, rev)) {
	422	if (ret)
	423	*ret = rev;
	424	if (rev->reason == CRL_REASON_REMOVE_FROM_CRL)
	425	return 2;
	426	return 1;
	427	}
	428	}
	429	return 0;
	430	}
010fa0b3	431
f4c630ab	432	void X509_CRL_set_default_method(const X509_CRL_METHOD *meth)
0f113f3e MC	433	{
	434	if (meth == NULL)
	435	default_crl_method = &int_crl_meth;
	436	else
	437	default_crl_method = meth;
	438	}
	439
	440	X509_CRL_METHOD X509_CRL_METHOD_new(int (crl_init) (X509_CRL *crl),
	441	int (crl_free) (X509_CRL crl),
	442	int (crl_lookup) (X509_CRL crl,
	443	X509_REVOKED **ret,
	444	ASN1_INTEGER *ser,
	445	X509_NAME *issuer),
	446	int (crl_verify) (X509_CRL crl,
	447	EVP_PKEY *pk))
	448	{
7fcdbd83 F	449	X509_CRL_METHOD m = OPENSSL_malloc(sizeof(m));
	450
	451	if (m == NULL) {
	452	X509err(X509_F_X509_CRL_METHOD_NEW, ERR_R_MALLOC_FAILURE);
0f113f3e	453	return NULL;
7fcdbd83	454	}
0f113f3e MC	455	m->crl_init = crl_init;
	456	m->crl_free = crl_free;
	457	m->crl_lookup = crl_lookup;
	458	m->crl_verify = crl_verify;
	459	m->flags = X509_CRL_METHOD_DYNAMIC;
	460	return m;
	461	}
f4c630ab DSH	462
f4c630ab DSH	463	void X509_CRL_METHOD_free(X509_CRL_METHOD *m)
0f113f3e	464	{
7cb1ecec	465	if (m == NULL \|\| !(m->flags & X509_CRL_METHOD_DYNAMIC))
0f113f3e MC	466	return;
	467	OPENSSL_free(m);
	468	}
f4c630ab DSH	469
f4c630ab DSH	470	void X509_CRL_set_meth_data(X509_CRL crl, void dat)
0f113f3e MC	471	{
	472	crl->meth_data = dat;
	473	}
f4c630ab DSH	474
f4c630ab DSH	475	void X509_CRL_get_meth_data(X509_CRL crl)
0f113f3e MC	476	{
	477	return crl->meth_data;
	478	}