x509_vfy.c

		if (crl->idp_flags & (IDP_INDIRECT | IDP_REASONS))
			return 0;
		}
	else if (crl->idp_flags & IDP_REASONS)
		{
		/* If no new reasons reject */
		if (!(crl->idp_reasons & ~tmp_reasons))
			return 0;
		}
	/* Don't process deltas at this stage */
	else if (crl->base_crl_number)
		return 0;
	/* If issuer name doesn't match certificate need indirect CRL */
	if (X509_NAME_cmp(X509_get_issuer_name(x), X509_CRL_get_issuer(crl)))
		{
		if (!(crl->idp_flags & IDP_INDIRECT))
			return 0;
		}
	else
		crl_score |= CRL_SCORE_ISSUER_NAME;

	if (!(crl->flags & EXFLAG_CRITICAL))
		crl_score |= CRL_SCORE_NOCRITICAL;

	/* Check expiry */
	if (check_crl_time(ctx, crl, 0))
		crl_score |= CRL_SCORE_TIME;

	/* Check authority key ID and locate certificate issuer */
	crl_akid_check(ctx, crl, pissuer, &crl_score);

	/* If we can't locate certificate issuer at this point forget it */

	if (!(crl_score & CRL_SCORE_AKID))
		return 0;

	/* Check cert for matching CRL distribution points */

	if (crl_crldp_check(x, crl, crl_score, &crl_reasons))
		{
		/* If no new reasons reject */
		if (!(crl_reasons & ~tmp_reasons))
			return 0;
		tmp_reasons |= crl_reasons;
		crl_score |= CRL_SCORE_SCOPE;
		}

	*preasons = tmp_reasons;

	return crl_score;

	}

static void crl_akid_check(X509_STORE_CTX *ctx, X509_CRL *crl,
				X509 **pissuer, int *pcrl_score)
	{
	X509 *crl_issuer = NULL;
	X509_NAME *cnm = X509_CRL_get_issuer(crl);
	int cidx = ctx->error_depth;
	int i;

	if (cidx != sk_X509_num(ctx->chain) - 1)
		cidx++;

	crl_issuer = sk_X509_value(ctx->chain, cidx);

	if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
		{
		if (*pcrl_score & CRL_SCORE_ISSUER_NAME)
			{
			*pcrl_score |= CRL_SCORE_AKID|CRL_SCORE_ISSUER_CERT;
			*pissuer = crl_issuer;
			return;
			}
		}

	for (cidx++; cidx < sk_X509_num(ctx->chain); cidx++)
		{
		crl_issuer = sk_X509_value(ctx->chain, cidx);
		if (X509_NAME_cmp(X509_get_subject_name(crl_issuer), cnm))
			continue;
		if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
			{
			*pcrl_score |= CRL_SCORE_AKID|CRL_SCORE_SAME_PATH;
			*pissuer = crl_issuer;
			return;
			}
		}

	/* Anything else needs extended CRL support */

	if (!(ctx->param->flags & X509_V_FLAG_EXTENDED_CRL_SUPPORT))
		return;

	/* Otherwise the CRL issuer is not on the path. Look for it in the
	 * set of untrusted certificates.
	 */
	for (i = 0; i < sk_X509_num(ctx->untrusted); i++)
		{
		crl_issuer = sk_X509_value(ctx->untrusted, i);
		if (X509_NAME_cmp(X509_get_subject_name(crl_issuer), cnm))
			continue;
		if (X509_check_akid(crl_issuer, crl->akid) == X509_V_OK)
			{
			*pissuer = crl_issuer;
			*pcrl_score |= CRL_SCORE_AKID;
			return;
			}
		}
	}

/* Check the path of a CRL issuer certificate. This creates a new
 * X509_STORE_CTX and populates it with most of the parameters from the
 * parent. This could be optimised somewhat since a lot of path checking
 * will be duplicated by the parent, but this will rarely be used in 
 * practice.
 */

static int check_crl_path(X509_STORE_CTX *ctx, X509 *x)
	{
	X509_STORE_CTX crl_ctx;
	int ret;
	/* Don't allow recursive CRL path validation */
	if (ctx->parent)
		return 0;
	if (!X509_STORE_CTX_init(&crl_ctx, ctx->ctx, x, ctx->untrusted))
		return -1;

	crl_ctx.crls = ctx->crls;
	/* Copy verify params across */
	X509_STORE_CTX_set0_param(&crl_ctx, ctx->param);

	crl_ctx.parent = ctx;
	crl_ctx.verify_cb = ctx->verify_cb;

	/* Verify CRL issuer */
	ret = X509_verify_cert(&crl_ctx);

	if (ret <= 0)
		goto err;

	/* Check chain is acceptable */

	ret = check_crl_chain(ctx, ctx->chain, crl_ctx.chain);
	err:
	X509_STORE_CTX_cleanup(&crl_ctx);
	return ret;
	}

/* RFC3280 says nothing about the relationship between CRL path
 * and certificate path, which could lead to situations where a
 * certificate could be revoked or validated by a CA not authorised
 * to do so. RFC5280 is more strict and states that the two paths must
 * end in the same trust anchor, though some discussions remain...
 * until this is resolved we use the RFC5280 version
 */

static int check_crl_chain(X509_STORE_CTX *ctx,
			STACK_OF(X509) *cert_path,
			STACK_OF(X509) *crl_path)
	{
	X509 *cert_ta, *crl_ta;
	cert_ta = sk_X509_value(cert_path, sk_X509_num(cert_path) - 1);
	crl_ta = sk_X509_value(crl_path, sk_X509_num(crl_path) - 1);
	if (!X509_cmp(cert_ta, crl_ta))
		return 1;
	return 0;
	}

/* Check for match between two dist point names: three separate cases.
 * 1. Both are relative names and compare X509_NAME types.
 * 2. One full, one relative. Compare X509_NAME to GENERAL_NAMES.
 * 3. Both are full names and compare two GENERAL_NAMES.
 * 4. One is NULL: automatic match.
 */


static int idp_check_dp(DIST_POINT_NAME *a, DIST_POINT_NAME *b)
	{
	X509_NAME *nm = NULL;
	GENERAL_NAMES *gens = NULL;
	GENERAL_NAME *gena, *genb;
	int i, j;
	if (!a || !b)
		return 1;
	if (a->type == 1)
		{
		if (!a->dpname)
			return 0;
		/* Case 1: two X509_NAME */
		if (b->type == 1)
			{
			if (!b->dpname)
				return 0;
			if (!X509_NAME_cmp(a->dpname, b->dpname))
				return 1;
			else
				return 0;
			}
		/* Case 2: set name and GENERAL_NAMES appropriately */
		nm = a->dpname;
		gens = b->name.fullname;
		}
	else if (b->type == 1)
		{
		if (!b->dpname)
			return 0;
		/* Case 2: set name and GENERAL_NAMES appropriately */
		gens = a->name.fullname;
		nm = b->dpname;
		}

	/* Handle case 2 with one GENERAL_NAMES and one X509_NAME */
	if (nm)
		{
		for (i = 0; i < sk_GENERAL_NAME_num(gens); i++)
			{
			gena = sk_GENERAL_NAME_value(gens, i);	
			if (gena->type != GEN_DIRNAME)
				continue;
			if (!X509_NAME_cmp(nm, gena->d.directoryName))
				return 1;
			}
		return 0;
		}

	/* Else case 3: two GENERAL_NAMES */

	for (i = 0; i < sk_GENERAL_NAME_num(a->name.fullname); i++)
		{
		gena = sk_GENERAL_NAME_value(a->name.fullname, i);
		for (j = 0; j < sk_GENERAL_NAME_num(b->name.fullname); j++)
			{
			genb = sk_GENERAL_NAME_value(b->name.fullname, j);
			if (!GENERAL_NAME_cmp(gena, genb))
				return 1;
			}
		}

	return 0;

	}

static int crldp_check_crlissuer(DIST_POINT *dp, X509_CRL *crl, int crl_score)
	{
	int i;
	X509_NAME *nm = X509_CRL_get_issuer(crl);
	/* If no CRLissuer return is successful iff don't need a match */
	if (!dp->CRLissuer)
		return !!(crl_score & CRL_SCORE_ISSUER_NAME);
	for (i = 0; i < sk_GENERAL_NAME_num(dp->CRLissuer); i++)
		{
		GENERAL_NAME *gen = sk_GENERAL_NAME_value(dp->CRLissuer, i);
		if (gen->type != GEN_DIRNAME)
			continue;
		if (!X509_NAME_cmp(gen->d.directoryName, nm))
			return 1;
		}
	return 0;
	}

/* Check CRLDP and IDP */

static int crl_crldp_check(X509 *x, X509_CRL *crl, int crl_score,
				unsigned int *preasons)
	{
	int i;
	if (crl->idp_flags & IDP_ONLYATTR)
		return 0;
	if (x->ex_flags & EXFLAG_CA)
		{
		if (crl->idp_flags & IDP_ONLYUSER)
			return 0;
		}
	else
		{
		if (crl->idp_flags & IDP_ONLYCA)
			return 0;
		}
	*preasons = crl->idp_reasons;
	for (i = 0; i < sk_DIST_POINT_num(x->crldp); i++)
		{
		DIST_POINT *dp = sk_DIST_POINT_value(x->crldp, i);
		if (crldp_check_crlissuer(dp, crl, crl_score))
			{
			if (!crl->idp ||
			     idp_check_dp(dp->distpoint, crl->idp->distpoint))
				{
				*preasons &= dp->dp_reasons;
				return 1;
				}
			}
		}
	if ((!crl->idp || !crl->idp->distpoint) && (crl_score & CRL_SCORE_ISSUER_NAME))
		return 1;
	return 0;
	}

/* Retrieve CRL corresponding to current certificate.
 * If deltas enabled try to find a delta CRL too
 */
	
static int get_crl_delta(X509_STORE_CTX *ctx,
				X509_CRL **pcrl, X509_CRL **pdcrl, X509 *x)
	{
	int ok;
	X509 *issuer = NULL;
	int crl_score = 0;
	unsigned int reasons;
	X509_CRL *crl = NULL, *dcrl = NULL;
	STACK_OF(X509_CRL) *skcrl;
	X509_NAME *nm = X509_get_issuer_name(x);
	reasons = ctx->current_reasons;
	ok = get_crl_sk(ctx, &crl, &dcrl, 
				&issuer, &crl_score, &reasons, ctx->crls);

	if (ok)
		goto done;

	/* Lookup CRLs from store */

	skcrl = ctx->lookup_crls(ctx, nm);

	/* If no CRLs found and a near match from get_crl_sk use that */
	if (!skcrl && crl)
		goto done;

	get_crl_sk(ctx, &crl, &dcrl, &issuer, &crl_score, &reasons, skcrl);

	sk_X509_CRL_pop_free(skcrl, X509_CRL_free);

	done:

	/* If we got any kind of CRL use it and return success */
	if (crl)
		{
		ctx->current_issuer = issuer;
		ctx->current_crl_score = crl_score;
		ctx->current_reasons = reasons;
		*pcrl = crl;
		*pdcrl = dcrl;
		return 1;
		}

	return 0;
	}

/* Check CRL validity */
static int check_crl(X509_STORE_CTX *ctx, X509_CRL *crl)
	{
	X509 *issuer = NULL;
	EVP_PKEY *ikey = NULL;
	int ok = 0, chnum, cnum;
	cnum = ctx->error_depth;
	chnum = sk_X509_num(ctx->chain) - 1;
	/* if we have an alternative CRL issuer cert use that */
	if (ctx->current_issuer)
		issuer = ctx->current_issuer;

	/* Else find CRL issuer: if not last certificate then issuer
	 * is next certificate in chain.
	 */
	else if (cnum < chnum)
		issuer = sk_X509_value(ctx->chain, cnum + 1);
	else
		{
		issuer = sk_X509_value(ctx->chain, chnum);
		/* If not self signed, can't check signature */
		if(!ctx->check_issued(ctx, issuer, issuer))
			{
			ctx->error = X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER;
			ok = ctx->verify_cb(0, ctx);
			if(!ok) goto err;
			}
		}

	if(issuer)
		{
		/* Skip most tests for deltas because they have already
		 * been done
		 */
		if (!crl->base_crl_number)
			{
			/* Check for cRLSign bit if keyUsage present */
			if ((issuer->ex_flags & EXFLAG_KUSAGE) &&
				!(issuer->ex_kusage & KU_CRL_SIGN))
				{
				ctx->error = X509_V_ERR_KEYUSAGE_NO_CRL_SIGN;
				ok = ctx->verify_cb(0, ctx);
				if(!ok) goto err;
				}

			if (!(ctx->current_crl_score & CRL_SCORE_SCOPE))
				{
				ctx->error = X509_V_ERR_DIFFERENT_CRL_SCOPE;
				ok = ctx->verify_cb(0, ctx);
				if(!ok) goto err;
				}

			if (!(ctx->current_crl_score & CRL_SCORE_SAME_PATH))
				{
				if (check_crl_path(ctx, ctx->current_issuer) <= 0)
					{
					ctx->error = X509_V_ERR_CRL_PATH_VALIDATION_ERROR;
					ok = ctx->verify_cb(0, ctx);
					if(!ok) goto err;
					}
				}

			if (crl->idp_flags & IDP_INVALID)
				{
				ctx->error = X509_V_ERR_INVALID_EXTENSION;
				ok = ctx->verify_cb(0, ctx);
				if(!ok) goto err;
				}


			}

		if (!(ctx->current_crl_score & CRL_SCORE_TIME))
			{
			ok = check_crl_time(ctx, crl, 1);
			if (!ok)
				goto err;
			}

		/* Attempt to get issuer certificate public key */
		ikey = X509_get_pubkey(issuer);

		if(!ikey)
			{
			ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
			ok = ctx->verify_cb(0, ctx);
			if (!ok) goto err;
			}
		else
			{
			/* Verify CRL signature */
			if(X509_CRL_verify(crl, ikey) <= 0)
				{
				ctx->error=X509_V_ERR_CRL_SIGNATURE_FAILURE;
				ok = ctx->verify_cb(0, ctx);
				if (!ok) goto err;
				}
			}
		}

	ok = 1;

	err:
	EVP_PKEY_free(ikey);
	return ok;
	}

/* Check certificate against CRL */
static int cert_crl(X509_STORE_CTX *ctx, X509_CRL *crl, X509 *x)
	{
	int ok;
	X509_REVOKED *rev;
	/* The rules changed for this... previously if a CRL contained
	 * unhandled critical extensions it could still be used to indicate
	 * a certificate was revoked. This has since been changed since 
	 * critical extension can change the meaning of CRL entries.
	 */
	if (!(ctx->param->flags & X509_V_FLAG_IGNORE_CRITICAL)
		&& (crl->flags & EXFLAG_CRITICAL))
		{
		ctx->error = X509_V_ERR_UNHANDLED_CRITICAL_CRL_EXTENSION;
		ok = ctx->verify_cb(0, ctx);
		if(!ok)
			return 0;
		}
	/* Look for serial number of certificate in CRL
	 * If found make sure reason is not removeFromCRL.
	 */
	if (X509_CRL_get0_by_cert(crl, &rev, x))
		{
		if (rev->reason == CRL_REASON_REMOVE_FROM_CRL)
			return 2;
		ctx->error = X509_V_ERR_CERT_REVOKED;
		ok = ctx->verify_cb(0, ctx);
		if (!ok)
			return 0;
		}

	return 1;
	}

static int check_policy(X509_STORE_CTX *ctx)
	{
	int ret;
	if (ctx->parent)
		return 1;
	ret = X509_policy_check(&ctx->tree, &ctx->explicit_policy, ctx->chain,
				ctx->param->policies, ctx->param->flags);
	if (ret == 0)
		{
		X509err(X509_F_CHECK_POLICY,ERR_R_MALLOC_FAILURE);
		return 0;
		}
	/* Invalid or inconsistent extensions */
	if (ret == -1)
		{
		/* Locate certificates with bad extensions and notify
		 * callback.
		 */
		X509 *x;
		int i;
		for (i = 1; i < sk_X509_num(ctx->chain); i++)
			{
			x = sk_X509_value(ctx->chain, i);
			if (!(x->ex_flags & EXFLAG_INVALID_POLICY))
				continue;
			ctx->current_cert = x;
			ctx->error = X509_V_ERR_INVALID_POLICY_EXTENSION;
			if(!ctx->verify_cb(0, ctx))
				return 0;
			}
		return 1;
		}
	if (ret == -2)
		{
		ctx->current_cert = NULL;
		ctx->error = X509_V_ERR_NO_EXPLICIT_POLICY;
		return ctx->verify_cb(0, ctx);
		}

	if (ctx->param->flags & X509_V_FLAG_NOTIFY_POLICY)
		{
		ctx->current_cert = NULL;
		ctx->error = X509_V_OK;
		if (!ctx->verify_cb(2, ctx))
			return 0;
		}

	return 1;
	}

static int check_cert_time(X509_STORE_CTX *ctx, X509 *x)
	{
	time_t *ptime;
	int i;

	if (ctx->param->flags & X509_V_FLAG_USE_CHECK_TIME)
		ptime = &ctx->param->check_time;
	else
		ptime = NULL;

	i=X509_cmp_time(X509_get_notBefore(x), ptime);
	if (i == 0)
		{
		ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD;
		ctx->current_cert=x;
		if (!ctx->verify_cb(0, ctx))
			return 0;
		}

	if (i > 0)
		{
		ctx->error=X509_V_ERR_CERT_NOT_YET_VALID;
		ctx->current_cert=x;
		if (!ctx->verify_cb(0, ctx))
			return 0;
		}

	i=X509_cmp_time(X509_get_notAfter(x), ptime);
	if (i == 0)
		{
		ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD;
		ctx->current_cert=x;
		if (!ctx->verify_cb(0, ctx))
			return 0;
		}

	if (i < 0)
		{
		ctx->error=X509_V_ERR_CERT_HAS_EXPIRED;
		ctx->current_cert=x;
		if (!ctx->verify_cb(0, ctx))
			return 0;
		}

	return 1;
	}

static int internal_verify(X509_STORE_CTX *ctx)
	{
	int ok=0,n;
	X509 *xs,*xi;
	EVP_PKEY *pkey=NULL;
	int (*cb)(int xok,X509_STORE_CTX *xctx);

	cb=ctx->verify_cb;

	n=sk_X509_num(ctx->chain);
	ctx->error_depth=n-1;
	n--;
	xi=sk_X509_value(ctx->chain,n);

	if (ctx->check_issued(ctx, xi, xi))
		xs=xi;
	else
		{
		if (n <= 0)
			{
			ctx->error=X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE;
			ctx->current_cert=xi;
			ok=cb(0,ctx);
			goto end;
			}
		else
			{
			n--;
			ctx->error_depth=n;
			xs=sk_X509_value(ctx->chain,n);
			}
		}

/*	ctx->error=0;  not needed */
	while (n >= 0)
		{
		ctx->error_depth=n;

		/* Skip signature check for self signed certificates unless
		 * explicitly asked for. It doesn't add any security and
		 * just wastes time.
		 */
		if (!xs->valid && (xs != xi || (ctx->param->flags & X509_V_FLAG_CHECK_SS_SIGNATURE)))
			{
			if ((pkey=X509_get_pubkey(xi)) == NULL)
				{
				ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
				ctx->current_cert=xi;
				ok=(*cb)(0,ctx);
				if (!ok) goto end;
				}
			else if (X509_verify(xs,pkey) <= 0)
				{
				ctx->error=X509_V_ERR_CERT_SIGNATURE_FAILURE;
				ctx->current_cert=xs;
				ok=(*cb)(0,ctx);
				if (!ok)
					{
					EVP_PKEY_free(pkey);
					goto end;
					}
				}
			EVP_PKEY_free(pkey);
			pkey=NULL;
			}

		xs->valid = 1;

		ok = check_cert_time(ctx, xs);
		if (!ok)
			goto end;

		/* The last error (if any) is still in the error value */
		ctx->current_issuer=xi;
		ctx->current_cert=xs;
		ok=(*cb)(1,ctx);
		if (!ok) goto end;

		n--;
		if (n >= 0)
			{
			xi=xs;
			xs=sk_X509_value(ctx->chain,n);
			}
		}
	ok=1;
end:
	return ok;
	}

int X509_cmp_current_time(const ASN1_TIME *ctm)
{
	return X509_cmp_time(ctm, NULL);
}

int X509_cmp_time(const ASN1_TIME *ctm, time_t *cmp_time)
	{
	char *str;
	ASN1_TIME atm;
	long offset;
	char buff1[24],buff2[24],*p;
	int i,j;

	p=buff1;
	i=ctm->length;
	str=(char *)ctm->data;
	if (ctm->type == V_ASN1_UTCTIME)
		{
		if ((i < 11) || (i > 17)) return 0;
		memcpy(p,str,10);
		p+=10;
		str+=10;
		}
	else
		{
		if (i < 13) return 0;
		memcpy(p,str,12);
		p+=12;
		str+=12;
		}

	if ((*str == 'Z') || (*str == '-') || (*str == '+'))
		{ *(p++)='0'; *(p++)='0'; }
	else
		{ 
		*(p++)= *(str++);
		*(p++)= *(str++);
		/* Skip any fractional seconds... */
		if (*str == '.')
			{
			str++;
			while ((*str >= '0') && (*str <= '9')) str++;
			}
		
		}
	*(p++)='Z';
	*(p++)='\0';

	if (*str == 'Z')
		offset=0;
	else
		{
		if ((*str != '+') && (*str != '-'))
			return 0;
		offset=((str[1]-'0')*10+(str[2]-'0'))*60;
		offset+=(str[3]-'0')*10+(str[4]-'0');
		if (*str == '-')
			offset= -offset;
		}
	atm.type=ctm->type;
	atm.flags = 0;
	atm.length=sizeof(buff2);
	atm.data=(unsigned char *)buff2;

	if (X509_time_adj(&atm, offset*60, cmp_time) == NULL)
		return 0;

	if (ctm->type == V_ASN1_UTCTIME)
		{
		i=(buff1[0]-'0')*10+(buff1[1]-'0');
		if (i < 50) i+=100; /* cf. RFC 2459 */
		j=(buff2[0]-'0')*10+(buff2[1]-'0');
		if (j < 50) j+=100;

		if (i < j) return -1;
		if (i > j) return 1;
		}
	i=strcmp(buff1,buff2);
	if (i == 0) /* wait a second then return younger :-) */
		return -1;
	else
		return i;
	}

ASN1_TIME *X509_gmtime_adj(ASN1_TIME *s, long adj)
{
	return X509_time_adj(s, adj, NULL);
}

ASN1_TIME *X509_time_adj(ASN1_TIME *s, long offset_sec, time_t *in_tm)
	{
	return X509_time_adj_ex(s, 0, offset_sec, in_tm);
	}

ASN1_TIME *X509_time_adj_ex(ASN1_TIME *s,
				int offset_day, long offset_sec, time_t *in_tm)
	{
	time_t t;

	if (in_tm) t = *in_tm;
	else time(&t);

	if (s && !(s->flags & ASN1_STRING_FLAG_MSTRING))
		{
		if (s->type == V_ASN1_UTCTIME)
			return ASN1_UTCTIME_adj(s,t, offset_day, offset_sec);
		if (s->type == V_ASN1_GENERALIZEDTIME)
			return ASN1_GENERALIZEDTIME_adj(s, t, offset_day,
								offset_sec);
		}
	return ASN1_TIME_adj(s, t, offset_day, offset_sec);
	}

int X509_get_pubkey_parameters(EVP_PKEY *pkey, STACK_OF(X509) *chain)
	{
	EVP_PKEY *ktmp=NULL,*ktmp2;
	int i,j;

	if ((pkey != NULL) && !EVP_PKEY_missing_parameters(pkey)) return 1;

	for (i=0; i<sk_X509_num(chain); i++)
		{
		ktmp=X509_get_pubkey(sk_X509_value(chain,i));
		if (ktmp == NULL)
			{
			X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_GET_CERTS_PUBLIC_KEY);
			return 0;
			}
		if (!EVP_PKEY_missing_parameters(ktmp))
			break;
		else
			{
			EVP_PKEY_free(ktmp);
			ktmp=NULL;
			}
		}
	if (ktmp == NULL)
		{
		X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_FIND_PARAMETERS_IN_CHAIN);
		return 0;
		}

	/* first, populate the other certs */
	for (j=i-1; j >= 0; j--)
		{
		ktmp2=X509_get_pubkey(sk_X509_value(chain,j));
		EVP_PKEY_copy_parameters(ktmp2,ktmp);
		EVP_PKEY_free(ktmp2);
		}
	
	if (pkey != NULL) EVP_PKEY_copy_parameters(pkey,ktmp);
	EVP_PKEY_free(ktmp);
	return 1;
	}

int X509_STORE_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
	     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
	{
	/* This function is (usually) called only once, by
	 * SSL_get_ex_data_X509_STORE_CTX_idx (ssl/ssl_cert.c). */
	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_X509_STORE_CTX, argl, argp,
			new_func, dup_func, free_func);
	}

int X509_STORE_CTX_set_ex_data(X509_STORE_CTX *ctx, int idx, void *data)
	{
	return CRYPTO_set_ex_data(&ctx->ex_data,idx,data);
	}

void *X509_STORE_CTX_get_ex_data(X509_STORE_CTX *ctx, int idx)
	{
	return CRYPTO_get_ex_data(&ctx->ex_data,idx);
	}

int X509_STORE_CTX_get_error(X509_STORE_CTX *ctx)
	{
	return ctx->error;
	}

void X509_STORE_CTX_set_error(X509_STORE_CTX *ctx, int err)
	{
	ctx->error=err;
	}

int X509_STORE_CTX_get_error_depth(X509_STORE_CTX *ctx)
	{
	return ctx->error_depth;
	}

X509 *X509_STORE_CTX_get_current_cert(X509_STORE_CTX *ctx)
	{
	return ctx->current_cert;
	}

STACK_OF(X509) *X509_STORE_CTX_get_chain(X509_STORE_CTX *ctx)
	{
	return ctx->chain;
	}

STACK_OF(X509) *X509_STORE_CTX_get1_chain(X509_STORE_CTX *ctx)
	{
	int i;
	X509 *x;
	STACK_OF(X509) *chain;
	if (!ctx->chain || !(chain = sk_X509_dup(ctx->chain))) return NULL;
	for (i = 0; i < sk_X509_num(chain); i++)
		{
		x = sk_X509_value(chain, i);
		CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
		}
	return chain;
	}

X509 *X509_STORE_CTX_get0_current_issuer(X509_STORE_CTX *ctx)
	{
	return ctx->current_issuer;
	}

X509_CRL *X509_STORE_CTX_get0_current_crl(X509_STORE_CTX *ctx)
	{
	return ctx->current_crl;
	}

X509_STORE_CTX *X509_STORE_CTX_get0_parent_ctx(X509_STORE_CTX *ctx)
	{
	return ctx->parent;
	}

void X509_STORE_CTX_set_cert(X509_STORE_CTX *ctx, X509 *x)
	{
	ctx->cert=x;
	}

void X509_STORE_CTX_set_chain(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
	{
	ctx->untrusted=sk;
	}

void X509_STORE_CTX_set0_crls(X509_STORE_CTX *ctx, STACK_OF(X509_CRL) *sk)
	{
	ctx->crls=sk;
	}

int X509_STORE_CTX_set_purpose(X509_STORE_CTX *ctx, int purpose)
	{
	return X509_STORE_CTX_purpose_inherit(ctx, 0, purpose, 0);
	}

int X509_STORE_CTX_set_trust(X509_STORE_CTX *ctx, int trust)
	{
	return X509_STORE_CTX_purpose_inherit(ctx, 0, 0, trust);
	}

/* This function is used to set the X509_STORE_CTX purpose and trust
 * values. This is intended to be used when another structure has its
 * own trust and purpose values which (if set) will be inherited by
 * the ctx. If they aren't set then we will usually have a default
 * purpose in mind which should then be used to set the trust value.
 * An example of this is SSL use: an SSL structure will have its own
 * purpose and trust settings which the application can set: if they
 * aren't set then we use the default of SSL client/server.
 */

int X509_STORE_CTX_purpose_inherit(X509_STORE_CTX *ctx, int def_purpose,
				int purpose, int trust)
{
	int idx;
	/* If purpose not set use default */
	if (!purpose) purpose = def_purpose;
	/* If we have a purpose then check it is valid */
	if (purpose)
		{
		X509_PURPOSE *ptmp;
		idx = X509_PURPOSE_get_by_id(purpose);
		if (idx == -1)
			{
			X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
						X509_R_UNKNOWN_PURPOSE_ID);
			return 0;
			}
		ptmp = X509_PURPOSE_get0(idx);
		if (ptmp->trust == X509_TRUST_DEFAULT)
			{
			idx = X509_PURPOSE_get_by_id(def_purpose);
			if (idx == -1)
				{
				X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
						X509_R_UNKNOWN_PURPOSE_ID);
				return 0;
				}
			ptmp = X509_PURPOSE_get0(idx);
			}
		/* If trust not set then get from purpose default */
		if (!trust) trust = ptmp->trust;
		}
	if (trust)
		{
		idx = X509_TRUST_get_by_id(trust);
		if (idx == -1)
			{
			X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
						X509_R_UNKNOWN_TRUST_ID);
			return 0;
			}
		}

	if (purpose && !ctx->param->purpose) ctx->param->purpose = purpose;
	if (trust && !ctx->param->trust) ctx->param->trust = trust;
	return 1;
}

X509_STORE_CTX *X509_STORE_CTX_new(void)
{
	X509_STORE_CTX *ctx;
	ctx = (X509_STORE_CTX *)OPENSSL_malloc(sizeof(X509_STORE_CTX));
	if (!ctx)
		{
		X509err(X509_F_X509_STORE_CTX_NEW,ERR_R_MALLOC_FAILURE);
		return NULL;
		}
	memset(ctx, 0, sizeof(X509_STORE_CTX));
	return ctx;
}

void X509_STORE_CTX_free(X509_STORE_CTX *ctx)