crypto/x509/x_x509.c - third_party/openssl - Git at Google

 /*
  * Copyright 1995-2020 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/evp.h>
 #include <openssl/asn1t.h>
 #include <openssl/x509.h>
 #include <openssl/x509v3.h>
 #include "crypto/x509.h"

 ASN1_SEQUENCE_enc(X509_CINF, enc, 0) = {
         ASN1_EXP_OPT(X509_CINF, version, ASN1_INTEGER, 0),
         ASN1_EMBED(X509_CINF, serialNumber, ASN1_INTEGER),
         ASN1_EMBED(X509_CINF, signature, X509_ALGOR),
         ASN1_SIMPLE(X509_CINF, issuer, X509_NAME),
         ASN1_EMBED(X509_CINF, validity, X509_VAL),
         ASN1_SIMPLE(X509_CINF, subject, X509_NAME),
         ASN1_SIMPLE(X509_CINF, key, X509_PUBKEY),
         ASN1_IMP_OPT(X509_CINF, issuerUID, ASN1_BIT_STRING, 1),
         ASN1_IMP_OPT(X509_CINF, subjectUID, ASN1_BIT_STRING, 2),
         ASN1_EXP_SEQUENCE_OF_OPT(X509_CINF, extensions, X509_EXTENSION, 3)
 } ASN1_SEQUENCE_END_enc(X509_CINF, X509_CINF)

 IMPLEMENT_ASN1_FUNCTIONS(X509_CINF)
 /* X509 top level structure needs a bit of customisation */

 extern void policy_cache_free(X509_POLICY_CACHE *cache);

 static int x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
                    void *exarg)
 {
     X509 *ret = (X509 *)*pval;

     switch (operation) {

     case ASN1_OP_D2I_PRE:
         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
         X509_CERT_AUX_free(ret->aux);
         ASN1_OCTET_STRING_free(ret->skid);
         AUTHORITY_KEYID_free(ret->akid);
         CRL_DIST_POINTS_free(ret->crldp);
         policy_cache_free(ret->policy_cache);
         GENERAL_NAMES_free(ret->altname);
         NAME_CONSTRAINTS_free(ret->nc);
 #ifndef OPENSSL_NO_RFC3779
         sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
         ASIdentifiers_free(ret->rfc3779_asid);
 #endif
         ASN1_OCTET_STRING_free(ret->distinguishing_id);

         /* fall thru */

     case ASN1_OP_NEW_POST:
         ret->ex_cached = 0;
         ret->ex_kusage = 0;
         ret->ex_xkusage = 0;
         ret->ex_nscert = 0;
         ret->ex_flags = 0;
         ret->ex_pathlen = -1;
         ret->ex_pcpathlen = -1;
         ret->skid = NULL;
         ret->akid = NULL;
         ret->policy_cache = NULL;
         ret->altname = NULL;
         ret->nc = NULL;
 #ifndef OPENSSL_NO_RFC3779
         ret->rfc3779_addr = NULL;
         ret->rfc3779_asid = NULL;
 #endif
         ret->distinguishing_id = NULL;
         ret->aux = NULL;
         ret->crldp = NULL;
         if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data))
             return 0;
         break;

     case ASN1_OP_FREE_POST:
         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
         X509_CERT_AUX_free(ret->aux);
         ASN1_OCTET_STRING_free(ret->skid);
         AUTHORITY_KEYID_free(ret->akid);
         CRL_DIST_POINTS_free(ret->crldp);
         policy_cache_free(ret->policy_cache);
         GENERAL_NAMES_free(ret->altname);
         NAME_CONSTRAINTS_free(ret->nc);
 #ifndef OPENSSL_NO_RFC3779
         sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
         ASIdentifiers_free(ret->rfc3779_asid);
 #endif
         ASN1_OCTET_STRING_free(ret->distinguishing_id);
         break;

     }

     return 1;

 }

 ASN1_SEQUENCE_ref(X509, x509_cb) = {
         ASN1_EMBED(X509, cert_info, X509_CINF),
         ASN1_EMBED(X509, sig_alg, X509_ALGOR),
         ASN1_EMBED(X509, signature, ASN1_BIT_STRING)
 } ASN1_SEQUENCE_END_ref(X509, X509)

 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(X509, X509, X509)
 IMPLEMENT_ASN1_DUP_FUNCTION(X509)

 X509 *d2i_X509(X509 **a, const unsigned char **in, long len)
 {
     X509 *cert = NULL;

     cert = (X509 *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, (X509_it()));
     /* Only cache the extensions if the cert object was passed in */
     if (cert != NULL && a != NULL) {
         if (!x509v3_cache_extensions(cert))
             cert = NULL;
     }
     return cert;
 }
 int i2d_X509(const X509 *a, unsigned char **out)
 {
     return ASN1_item_i2d((const ASN1_VALUE *)a, out, (X509_it()));
 }

 /*
  * This should only be used if the X509 object was embedded inside another
  * asn1 object and it needs a libctx to operate.
  * Use X509_new_ex() instead if possible.
  */
 int x509_set0_libctx(X509 *x, OSSL_LIB_CTX *libctx, const char *propq)
 {
     if (x != NULL) {
         x->libctx = libctx;
         x->propq = propq;
     }
     return 1;
 }

 X509 *X509_new_ex(OSSL_LIB_CTX *libctx, const char *propq)
 {
     X509 *cert = NULL;

     cert = (X509 *)ASN1_item_new((X509_it()));
     (void)x509_set0_libctx(cert, libctx, propq);
     return cert;
 }

 int X509_set_ex_data(X509 *r, int idx, void *arg)
 {
     return CRYPTO_set_ex_data(&r->ex_data, idx, arg);
 }

 void *X509_get_ex_data(const X509 *r, int idx)
 {
     return CRYPTO_get_ex_data(&r->ex_data, idx);
 }

 /*
  * X509_AUX ASN1 routines. X509_AUX is the name given to a certificate with
  * extra info tagged on the end. Since these functions set how a certificate
  * is trusted they should only be used when the certificate comes from a
  * reliable source such as local storage.
  */

 X509 *d2i_X509_AUX(X509 **a, const unsigned char **pp, long length)
 {
     const unsigned char *q;
     X509 *ret;
     int freeret = 0;

     /* Save start position */
     q = *pp;

     if (a == NULL || *a == NULL)
         freeret = 1;
     ret = d2i_X509(a, &q, length);
     /* If certificate unreadable then forget it */
     if (ret == NULL)
         return NULL;
     /* update length */
     length -= q - *pp;
     if (length > 0 && !d2i_X509_CERT_AUX(&ret->aux, &q, length))
         goto err;
     *pp = q;
     return ret;
  err:
     if (freeret) {
         X509_free(ret);
         if (a)
             *a = NULL;
     }
     return NULL;
 }

 /*
  * Serialize trusted certificate to *pp or just return the required buffer
  * length if pp == NULL.  We ultimately want to avoid modifying *pp in the
  * error path, but that depends on similar hygiene in lower-level functions.
  * Here we avoid compounding the problem.
  */
 static int i2d_x509_aux_internal(const X509 *a, unsigned char **pp)
 {
     int length, tmplen;
     unsigned char *start = pp != NULL ? *pp : NULL;

     /*
      * This might perturb *pp on error, but fixing that belongs in i2d_X509()
      * not here.  It should be that if a == NULL length is zero, but we check
      * both just in case.
      */
     length = i2d_X509(a, pp);
     if (length <= 0 || a == NULL)
         return length;

     tmplen = i2d_X509_CERT_AUX(a->aux, pp);
     if (tmplen < 0) {
         if (start != NULL)
             *pp = start;
         return tmplen;
     }
     length += tmplen;

     return length;
 }

 /*
  * Serialize trusted certificate to *pp, or just return the required buffer
  * length if pp == NULL.
  *
  * When pp is not NULL, but *pp == NULL, we allocate the buffer, but since
  * we're writing two ASN.1 objects back to back, we can't have i2d_X509() do
  * the allocation, nor can we allow i2d_X509_CERT_AUX() to increment the
  * allocated buffer.
  */
 int i2d_X509_AUX(const X509 *a, unsigned char **pp)
 {
     int length;
     unsigned char *tmp;

     /* Buffer provided by caller */
     if (pp == NULL || *pp != NULL)
         return i2d_x509_aux_internal(a, pp);

     /* Obtain the combined length */
     if ((length = i2d_x509_aux_internal(a, NULL)) <= 0)
         return length;

     /* Allocate requisite combined storage */
     *pp = tmp = OPENSSL_malloc(length);
     if (tmp == NULL) {
         ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
         return -1;
     }

     /* Encode, but keep *pp at the originally malloced pointer */
     length = i2d_x509_aux_internal(a, &tmp);
     if (length <= 0) {
         OPENSSL_free(*pp);
         *pp = NULL;
     }
     return length;
 }

 int i2d_re_X509_tbs(X509 *x, unsigned char **pp)
 {
     x->cert_info.enc.modified = 1;
     return i2d_X509_CINF(&x->cert_info, pp);
 }

 void X509_get0_signature(const ASN1_BIT_STRING **psig,
                          const X509_ALGOR **palg, const X509 *x)
 {
     if (psig)
         *psig = &x->signature;
     if (palg)
         *palg = &x->sig_alg;
 }

 int X509_get_signature_nid(const X509 *x)
 {
     return OBJ_obj2nid(x->sig_alg.algorithm);
 }

 void X509_set0_distinguishing_id(X509 *x, ASN1_OCTET_STRING *d_id)
 {
     ASN1_OCTET_STRING_free(x->distinguishing_id);
     x->distinguishing_id = d_id;
 }

 ASN1_OCTET_STRING *X509_get0_distinguishing_id(X509 *x)
 {
     return x->distinguishing_id;
 }
	/*
	* Copyright 1995-2020 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/evp.h>
	#include <openssl/asn1t.h>
	#include <openssl/x509.h>
	#include <openssl/x509v3.h>
	#include "crypto/x509.h"

	ASN1_SEQUENCE_enc(X509_CINF, enc, 0) = {
	ASN1_EXP_OPT(X509_CINF, version, ASN1_INTEGER, 0),
	ASN1_EMBED(X509_CINF, serialNumber, ASN1_INTEGER),
	ASN1_EMBED(X509_CINF, signature, X509_ALGOR),
	ASN1_SIMPLE(X509_CINF, issuer, X509_NAME),
	ASN1_EMBED(X509_CINF, validity, X509_VAL),
	ASN1_SIMPLE(X509_CINF, subject, X509_NAME),
	ASN1_SIMPLE(X509_CINF, key, X509_PUBKEY),
	ASN1_IMP_OPT(X509_CINF, issuerUID, ASN1_BIT_STRING, 1),
	ASN1_IMP_OPT(X509_CINF, subjectUID, ASN1_BIT_STRING, 2),
	ASN1_EXP_SEQUENCE_OF_OPT(X509_CINF, extensions, X509_EXTENSION, 3)
	} ASN1_SEQUENCE_END_enc(X509_CINF, X509_CINF)

	IMPLEMENT_ASN1_FUNCTIONS(X509_CINF)
	/* X509 top level structure needs a bit of customisation */

	extern void policy_cache_free(X509_POLICY_CACHE *cache);

	static int x509_cb(int operation, ASN1_VALUE *pval, const ASN1_ITEM it,
	void *exarg)
	{
	X509 ret = (X509 )*pval;

	switch (operation) {

	case ASN1_OP_D2I_PRE:
	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
	X509_CERT_AUX_free(ret->aux);
	ASN1_OCTET_STRING_free(ret->skid);
	AUTHORITY_KEYID_free(ret->akid);
	CRL_DIST_POINTS_free(ret->crldp);
	policy_cache_free(ret->policy_cache);
	GENERAL_NAMES_free(ret->altname);
	NAME_CONSTRAINTS_free(ret->nc);
	#ifndef OPENSSL_NO_RFC3779
	sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
	ASIdentifiers_free(ret->rfc3779_asid);
	#endif
	ASN1_OCTET_STRING_free(ret->distinguishing_id);

	/* fall thru */

	case ASN1_OP_NEW_POST:
	ret->ex_cached = 0;
	ret->ex_kusage = 0;
	ret->ex_xkusage = 0;
	ret->ex_nscert = 0;
	ret->ex_flags = 0;
	ret->ex_pathlen = -1;
	ret->ex_pcpathlen = -1;
	ret->skid = NULL;
	ret->akid = NULL;
	ret->policy_cache = NULL;
	ret->altname = NULL;
	ret->nc = NULL;
	#ifndef OPENSSL_NO_RFC3779
	ret->rfc3779_addr = NULL;
	ret->rfc3779_asid = NULL;
	#endif
	ret->distinguishing_id = NULL;
	ret->aux = NULL;
	ret->crldp = NULL;
	if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data))
	return 0;
	break;

	case ASN1_OP_FREE_POST:
	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
	X509_CERT_AUX_free(ret->aux);
	ASN1_OCTET_STRING_free(ret->skid);
	AUTHORITY_KEYID_free(ret->akid);
	CRL_DIST_POINTS_free(ret->crldp);
	policy_cache_free(ret->policy_cache);
	GENERAL_NAMES_free(ret->altname);
	NAME_CONSTRAINTS_free(ret->nc);
	#ifndef OPENSSL_NO_RFC3779
	sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
	ASIdentifiers_free(ret->rfc3779_asid);
	#endif
	ASN1_OCTET_STRING_free(ret->distinguishing_id);
	break;

	}

	return 1;

	}

	ASN1_SEQUENCE_ref(X509, x509_cb) = {
	ASN1_EMBED(X509, cert_info, X509_CINF),
	ASN1_EMBED(X509, sig_alg, X509_ALGOR),
	ASN1_EMBED(X509, signature, ASN1_BIT_STRING)
	} ASN1_SEQUENCE_END_ref(X509, X509)

	IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(X509, X509, X509)
	IMPLEMENT_ASN1_DUP_FUNCTION(X509)

	X509 d2i_X509(X509 a, const unsigned char *in, long len)
	{
	X509 *cert = NULL;

	cert = (X509 )ASN1_item_d2i((ASN1_VALUE *)a, in, len, (X509_it()));
	/* Only cache the extensions if the cert object was passed in */
	if (cert != NULL && a != NULL) {
	if (!x509v3_cache_extensions(cert))
	cert = NULL;
	}
	return cert;
	}
	int i2d_X509(const X509 a, unsigned char *out)
	{
	return ASN1_item_i2d((const ASN1_VALUE *)a, out, (X509_it()));
	}

	/*
	* This should only be used if the X509 object was embedded inside another
	* asn1 object and it needs a libctx to operate.
	* Use X509_new_ex() instead if possible.
	*/
	int x509_set0_libctx(X509 x, OSSL_LIB_CTX libctx, const char *propq)
	{
	if (x != NULL) {
	x->libctx = libctx;
	x->propq = propq;
	}
	return 1;
	}

	X509 X509_new_ex(OSSL_LIB_CTX libctx, const char *propq)
	{
	X509 *cert = NULL;

	cert = (X509 *)ASN1_item_new((X509_it()));
	(void)x509_set0_libctx(cert, libctx, propq);
	return cert;
	}

	int X509_set_ex_data(X509 r, int idx, void arg)
	{
	return CRYPTO_set_ex_data(&r->ex_data, idx, arg);
	}

	void X509_get_ex_data(const X509 r, int idx)
	{
	return CRYPTO_get_ex_data(&r->ex_data, idx);
	}

	/*
	* X509_AUX ASN1 routines. X509_AUX is the name given to a certificate with
	* extra info tagged on the end. Since these functions set how a certificate
	* is trusted they should only be used when the certificate comes from a
	* reliable source such as local storage.
	*/

	X509 d2i_X509_AUX(X509 a, const unsigned char *pp, long length)
	{
	const unsigned char *q;
	X509 *ret;
	int freeret = 0;

	/* Save start position */
	q = *pp;

	if (a == NULL \|\| *a == NULL)
	freeret = 1;
	ret = d2i_X509(a, &q, length);
	/* If certificate unreadable then forget it */
	if (ret == NULL)
	return NULL;
	/* update length */
	length -= q - *pp;
	if (length > 0 && !d2i_X509_CERT_AUX(&ret->aux, &q, length))
	goto err;
	*pp = q;
	return ret;
	err:
	if (freeret) {
	X509_free(ret);
	if (a)
	*a = NULL;
	}
	return NULL;
	}

	/*
	* Serialize trusted certificate to *pp or just return the required buffer
	* length if pp == NULL. We ultimately want to avoid modifying *pp in the
	* error path, but that depends on similar hygiene in lower-level functions.
	* Here we avoid compounding the problem.
	*/
	static int i2d_x509_aux_internal(const X509 a, unsigned char *pp)
	{
	int length, tmplen;
	unsigned char start = pp != NULL ? pp : NULL;

	/*
	* This might perturb *pp on error, but fixing that belongs in i2d_X509()
	* not here. It should be that if a == NULL length is zero, but we check
	* both just in case.
	*/
	length = i2d_X509(a, pp);
	if (length <= 0 \|\| a == NULL)
	return length;

	tmplen = i2d_X509_CERT_AUX(a->aux, pp);
	if (tmplen < 0) {
	if (start != NULL)
	*pp = start;
	return tmplen;
	}
	length += tmplen;

	return length;
	}

	/*
	* Serialize trusted certificate to *pp, or just return the required buffer
	* length if pp == NULL.
	*
	* When pp is not NULL, but *pp == NULL, we allocate the buffer, but since
	* we're writing two ASN.1 objects back to back, we can't have i2d_X509() do
	* the allocation, nor can we allow i2d_X509_CERT_AUX() to increment the
	* allocated buffer.
	*/
	int i2d_X509_AUX(const X509 a, unsigned char *pp)
	{
	int length;
	unsigned char *tmp;

	/* Buffer provided by caller */
	if (pp == NULL \|\| *pp != NULL)
	return i2d_x509_aux_internal(a, pp);

	/* Obtain the combined length */
	if ((length = i2d_x509_aux_internal(a, NULL)) <= 0)
	return length;

	/* Allocate requisite combined storage */
	*pp = tmp = OPENSSL_malloc(length);
	if (tmp == NULL) {
	ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
	return -1;
	}

	/* Encode, but keep pp at the originally malloced pointer /
	length = i2d_x509_aux_internal(a, &tmp);
	if (length <= 0) {
	OPENSSL_free(*pp);
	*pp = NULL;
	}
	return length;
	}

	int i2d_re_X509_tbs(X509 x, unsigned char *pp)
	{
	x->cert_info.enc.modified = 1;
	return i2d_X509_CINF(&x->cert_info, pp);
	}

	void X509_get0_signature(const ASN1_BIT_STRING **psig,
	const X509_ALGOR *palg, const X509 x)
	{
	if (psig)
	*psig = &x->signature;
	if (palg)
	*palg = &x->sig_alg;
	}

	int X509_get_signature_nid(const X509 *x)
	{
	return OBJ_obj2nid(x->sig_alg.algorithm);
	}

	void X509_set0_distinguishing_id(X509 x, ASN1_OCTET_STRING d_id)
	{
	ASN1_OCTET_STRING_free(x->distinguishing_id);
	x->distinguishing_id = d_id;
	}

	ASN1_OCTET_STRING X509_get0_distinguishing_id(X509 x)
	{
	return x->distinguishing_id;
	}