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* Copyright 2015-2021 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
#ifndef OSSL_CRYPTO_X509_H
# define OSSL_CRYPTO_X509_H
# pragma once
# include "internal/refcount.h"
# include <openssl/asn1.h>
# include <openssl/x509.h>
# include <openssl/conf.h>
# include "crypto/types.h"
/* Internal X509 structures and functions: not for application use */
/* Note: unless otherwise stated a field pointer is mandatory and should
* never be set to NULL: the ASN.1 code and accessors rely on mandatory
* fields never being NULL.
* name entry structure, equivalent to AttributeTypeAndValue defined
* in RFC5280 et al.
struct X509_name_entry_st {
ASN1_OBJECT *object; /* AttributeType */
ASN1_STRING *value; /* AttributeValue */
int set; /* index of RDNSequence for this entry */
int size; /* temp variable */
/* Name from RFC 5280. */
struct X509_name_st {
STACK_OF(X509_NAME_ENTRY) *entries; /* DN components */
int modified; /* true if 'bytes' needs to be built */
BUF_MEM *bytes; /* cached encoding: cannot be NULL */
/* canonical encoding used for rapid Name comparison */
unsigned char *canon_enc;
int canon_enclen;
} /* X509_NAME */ ;
/* Signature info structure */
struct x509_sig_info_st {
/* NID of message digest */
int mdnid;
/* NID of public key algorithm */
int pknid;
/* Security bits */
int secbits;
/* Various flags */
uint32_t flags;
/* PKCS#10 certificate request */
struct X509_req_info_st {
ASN1_ENCODING enc; /* cached encoding of signed part */
ASN1_INTEGER *version; /* version, defaults to v1(0) so can be NULL */
X509_NAME *subject; /* certificate request DN */
X509_PUBKEY *pubkey; /* public key of request */
* Zero or more attributes.
* NB: although attributes is a mandatory field some broken
* encodings omit it so this may be NULL in that case.
STACK_OF(X509_ATTRIBUTE) *attributes;
struct X509_req_st {
X509_REQ_INFO req_info; /* signed certificate request data */
X509_ALGOR sig_alg; /* signature algorithm */
ASN1_BIT_STRING *signature; /* signature */
CRYPTO_REF_COUNT references;
/* Set on live certificates for authentication purposes */
ASN1_OCTET_STRING *distinguishing_id;
OSSL_LIB_CTX *libctx;
char *propq;
struct X509_crl_info_st {
ASN1_INTEGER *version; /* version: defaults to v1(0) so may be NULL */
X509_ALGOR sig_alg; /* signature algorithm */
X509_NAME *issuer; /* CRL issuer name */
ASN1_TIME *lastUpdate; /* lastUpdate field */
ASN1_TIME *nextUpdate; /* nextUpdate field: optional */
STACK_OF(X509_REVOKED) *revoked; /* revoked entries: optional */
STACK_OF(X509_EXTENSION) *extensions; /* extensions: optional */
ASN1_ENCODING enc; /* encoding of signed portion of CRL */
struct X509_crl_st {
X509_CRL_INFO crl; /* signed CRL data */
X509_ALGOR sig_alg; /* CRL signature algorithm */
ASN1_BIT_STRING signature; /* CRL signature */
CRYPTO_REF_COUNT references;
int flags;
* Cached copies of decoded extension values, since extensions
* are optional any of these can be NULL.
/* Convenient breakdown of IDP */
int idp_flags;
int idp_reasons;
/* CRL and base CRL numbers for delta processing */
ASN1_INTEGER *crl_number;
ASN1_INTEGER *base_crl_number;
/* hash of CRL */
unsigned char sha1_hash[SHA_DIGEST_LENGTH];
/* alternative method to handle this CRL */
const X509_CRL_METHOD *meth;
void *meth_data;
OSSL_LIB_CTX *libctx;
char *propq;
struct x509_revoked_st {
ASN1_INTEGER serialNumber; /* revoked entry serial number */
ASN1_TIME *revocationDate; /* revocation date */
STACK_OF(X509_EXTENSION) *extensions; /* CRL entry extensions: optional */
/* decoded value of CRLissuer extension: set if indirect CRL */
/* revocation reason: set to CRL_REASON_NONE if reason extension absent */
int reason;
* CRL entries are reordered for faster lookup of serial numbers. This
* field contains the original load sequence for this entry.
int sequence;
* This stuff is certificate "auxiliary info": it contains details which are
* useful in certificate stores and databases. When used this is tagged onto
* the end of the certificate itself. OpenSSL specific structure not defined
* in any RFC.
struct x509_cert_aux_st {
STACK_OF(ASN1_OBJECT) *trust; /* trusted uses */
STACK_OF(ASN1_OBJECT) *reject; /* rejected uses */
ASN1_UTF8STRING *alias; /* "friendly name" */
ASN1_OCTET_STRING *keyid; /* key id of private key */
STACK_OF(X509_ALGOR) *other; /* other unspecified info */
struct x509_cinf_st {
ASN1_INTEGER *version; /* [ 0 ] default of v1 */
ASN1_INTEGER serialNumber;
X509_ALGOR signature;
X509_NAME *issuer;
X509_VAL validity;
X509_NAME *subject;
X509_PUBKEY *key;
ASN1_BIT_STRING *issuerUID; /* [ 1 ] optional in v2 */
ASN1_BIT_STRING *subjectUID; /* [ 2 ] optional in v2 */
STACK_OF(X509_EXTENSION) *extensions; /* [ 3 ] optional in v3 */
struct x509_st {
X509_CINF cert_info;
X509_ALGOR sig_alg;
ASN1_BIT_STRING signature;
X509_SIG_INFO siginf;
CRYPTO_REF_COUNT references;
/* These contain copies of various extension values */
long ex_pathlen;
long ex_pcpathlen;
uint32_t ex_flags;
uint32_t ex_kusage;
uint32_t ex_xkusage;
uint32_t ex_nscert;
X509_POLICY_CACHE *policy_cache;
# ifndef OPENSSL_NO_RFC3779
STACK_OF(IPAddressFamily) *rfc3779_addr;
struct ASIdentifiers_st *rfc3779_asid;
# endif
unsigned char sha1_hash[SHA_DIGEST_LENGTH];
X509_CERT_AUX *aux;
volatile int ex_cached;
/* Set on live certificates for authentication purposes */
ASN1_OCTET_STRING *distinguishing_id;
OSSL_LIB_CTX *libctx;
char *propq;
} /* X509 */ ;
* This is a used when verifying cert chains. Since the gathering of the
* cert chain can take some time (and have to be 'retried', this needs to be
* kept and passed around.
struct x509_store_ctx_st { /* X509_STORE_CTX */
X509_STORE *store;
/* The following are set by the caller */
/* The cert to check */
X509 *cert;
/* chain of X509s - untrusted - passed in */
STACK_OF(X509) *untrusted;
/* set of CRLs passed in */
STACK_OF(X509_CRL) *crls;
X509_VERIFY_PARAM *param;
/* Other info for use with get_issuer() */
void *other_ctx;
/* Callbacks for various operations */
/* called to verify a certificate */
int (*verify) (X509_STORE_CTX *ctx);
/* error callback */
int (*verify_cb) (int ok, X509_STORE_CTX *ctx);
/* get issuers cert from ctx */
int (*get_issuer) (X509 **issuer, X509_STORE_CTX *ctx, X509 *x);
/* check issued */
int (*check_issued) (X509_STORE_CTX *ctx, X509 *x, X509 *issuer);
/* Check revocation status of chain */
int (*check_revocation) (X509_STORE_CTX *ctx);
/* retrieve CRL */
int (*get_crl) (X509_STORE_CTX *ctx, X509_CRL **crl, X509 *x);
/* Check CRL validity */
int (*check_crl) (X509_STORE_CTX *ctx, X509_CRL *crl);
/* Check certificate against CRL */
int (*cert_crl) (X509_STORE_CTX *ctx, X509_CRL *crl, X509 *x);
/* Check policy status of the chain */
int (*check_policy) (X509_STORE_CTX *ctx);
STACK_OF(X509) *(*lookup_certs) (X509_STORE_CTX *ctx,
const X509_NAME *nm);
/* cannot constify 'ctx' param due to lookup_certs_sk() in x509_vfy.c */
STACK_OF(X509_CRL) *(*lookup_crls) (const X509_STORE_CTX *ctx,
const X509_NAME *nm);
int (*cleanup) (X509_STORE_CTX *ctx);
/* The following is built up */
/* if 0, rebuild chain */
int valid;
/* number of untrusted certs */
int num_untrusted;
/* chain of X509s - built up and trusted */
STACK_OF(X509) *chain;
/* Valid policy tree */
X509_POLICY_TREE *tree;
/* Require explicit policy value */
int explicit_policy;
/* When something goes wrong, this is why */
int error_depth;
int error;
X509 *current_cert;
/* cert currently being tested as valid issuer */
X509 *current_issuer;
/* current CRL */
X509_CRL *current_crl;
/* score of current CRL */
int current_crl_score;
/* Reason mask */
unsigned int current_reasons;
/* For CRL path validation: parent context */
X509_STORE_CTX *parent;
SSL_DANE *dane;
/* signed via bare TA public key, rather than CA certificate */
int bare_ta_signed;
OSSL_LIB_CTX *libctx;
char *propq;
/* PKCS#8 private key info structure */
struct pkcs8_priv_key_info_st {
ASN1_INTEGER *version;
X509_ALGOR *pkeyalg;
STACK_OF(X509_ATTRIBUTE) *attributes;
struct X509_sig_st {
X509_ALGOR *algor;
struct x509_object_st {
/* one of the above types */
X509_LOOKUP_TYPE type;
union {
char *ptr;
X509 *x509;
X509_CRL *crl;
EVP_PKEY *pkey;
} data;
int ossl_a2i_ipadd(unsigned char *ipout, const char *ipasc);
int ossl_x509_set1_time(ASN1_TIME **ptm, const ASN1_TIME *tm);
int ossl_x509_print_ex_brief(BIO *bio, X509 *cert, unsigned long neg_cflags);
int ossl_x509v3_cache_extensions(X509 *x);
int ossl_x509_init_sig_info(X509 *x);
int ossl_x509_set0_libctx(X509 *x, OSSL_LIB_CTX *libctx, const char *propq);
int ossl_x509_crl_set0_libctx(X509_CRL *x, OSSL_LIB_CTX *libctx,
const char *propq);
int ossl_x509_req_set0_libctx(X509_REQ *x, OSSL_LIB_CTX *libctx,
const char *propq);
int ossl_asn1_item_digest_ex(const ASN1_ITEM *it, const EVP_MD *type,
void *data, unsigned char *md, unsigned int *len,
OSSL_LIB_CTX *libctx, const char *propq);
int ossl_x509_add_cert_new(STACK_OF(X509) **sk, X509 *cert, int flags);
int ossl_x509_add_certs_new(STACK_OF(X509) **p_sk, STACK_OF(X509) *certs,
int flags);
STACK_OF(X509_ATTRIBUTE) *ossl_x509at_dup(const STACK_OF(X509_ATTRIBUTE) *x);
int ossl_x509_PUBKEY_get0_libctx(OSSL_LIB_CTX **plibctx, const char **ppropq,
const X509_PUBKEY *key);
/* Calculate default key identifier according to RFC 5280 section (1) */
ASN1_OCTET_STRING *ossl_x509_pubkey_hash(X509_PUBKEY *pubkey);
X509_PUBKEY *ossl_d2i_X509_PUBKEY_INTERNAL(const unsigned char **pp,
long len, OSSL_LIB_CTX *libctx);
void ossl_X509_PUBKEY_INTERNAL_free(X509_PUBKEY *xpub);
RSA *ossl_d2i_RSA_PSS_PUBKEY(RSA **a, const unsigned char **pp, long length);
int ossl_i2d_RSA_PSS_PUBKEY(const RSA *a, unsigned char **pp);
# ifndef OPENSSL_NO_DH
DH *ossl_d2i_DH_PUBKEY(DH **a, const unsigned char **pp, long length);
int ossl_i2d_DH_PUBKEY(const DH *a, unsigned char **pp);
DH *ossl_d2i_DHx_PUBKEY(DH **a, const unsigned char **pp, long length);
int ossl_i2d_DHx_PUBKEY(const DH *a, unsigned char **pp);
# endif /* OPENSSL_NO_DH */
# ifndef OPENSSL_NO_EC
ECX_KEY *ossl_d2i_ED25519_PUBKEY(ECX_KEY **a,
const unsigned char **pp, long length);
int ossl_i2d_ED25519_PUBKEY(const ECX_KEY *a, unsigned char **pp);
ECX_KEY *ossl_d2i_ED448_PUBKEY(ECX_KEY **a,
const unsigned char **pp, long length);
int ossl_i2d_ED448_PUBKEY(const ECX_KEY *a, unsigned char **pp);
ECX_KEY *ossl_d2i_X25519_PUBKEY(ECX_KEY **a,
const unsigned char **pp, long length);
int ossl_i2d_X25519_PUBKEY(const ECX_KEY *a, unsigned char **pp);
ECX_KEY *ossl_d2i_X448_PUBKEY(ECX_KEY **a,
const unsigned char **pp, long length);
int ossl_i2d_X448_PUBKEY(const ECX_KEY *a, unsigned char **pp);
# endif /* OPENSSL_NO_EC */
EVP_PKEY *ossl_d2i_PUBKEY_legacy(EVP_PKEY **a, const unsigned char **pp,
long length);
int x509v3_add_len_value_uchar(const char *name, const unsigned char *value,
size_t vallen, STACK_OF(CONF_VALUE) **extlist);
#endif /* OSSL_CRYPTO_X509_H */