/* asn.h
 *
 * Copyright (C) 2006-2020 wolfSSL Inc.
 *
 * This file is part of wolfSSL.
 *
 * wolfSSL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * wolfSSL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
 */

/*!
    \file wolfssl/wolfcrypt/asn.h
*/

/*

DESCRIPTION
This library provides the interface to Abstract Syntax Notation One (ASN.1) objects.
ASN.1 is a standard interface description language for defining data structures
that can be serialized and deserialized in a cross-platform way.

*/
#ifndef WOLF_CRYPT_ASN_H
#define WOLF_CRYPT_ASN_H

#include <wolfssl/wolfcrypt/types.h>

#ifndef NO_ASN


#if !defined(NO_ASN_TIME) && defined(NO_TIME_H)
    #define NO_ASN_TIME /* backwards compatibility with NO_TIME_H */
#endif

#include <wolfssl/wolfcrypt/integer.h>

/* fips declare of RsaPrivateKeyDecode @wc_fips */
#if defined(HAVE_FIPS) && !defined(NO_RSA) && \
	(!defined(HAVE_FIPS_VERSION) || (HAVE_FIPS_VERSION < 2))
    #include <cyassl/ctaocrypt/rsa.h>
#endif

#ifndef NO_DH
    #include <wolfssl/wolfcrypt/dh.h>
#endif
#ifndef NO_DSA
    #include <wolfssl/wolfcrypt/dsa.h>
#endif
#ifndef NO_SHA
    #include <wolfssl/wolfcrypt/sha.h>
#endif
#ifndef NO_MD5
    #include <wolfssl/wolfcrypt/md5.h>
#endif
#include <wolfssl/wolfcrypt/sha256.h>
#include <wolfssl/wolfcrypt/asn_public.h>   /* public interface */

#if defined(NO_SHA) && defined(NO_SHA256)
    #define WC_SHA256_DIGEST_SIZE 32
#endif

#ifdef __cplusplus
    extern "C" {
#endif

#ifndef EXTERNAL_SERIAL_SIZE
    #define EXTERNAL_SERIAL_SIZE 32
#endif

enum {
    ISSUER  = 0,
    SUBJECT = 1,

    BEFORE  = 0,
    AFTER   = 1
};

/* ASN Tags   */
enum ASN_Tags {
    ASN_EOC               = 0x00,
    ASN_BOOLEAN           = 0x01,
    ASN_INTEGER           = 0x02,
    ASN_BIT_STRING        = 0x03,
    ASN_OCTET_STRING      = 0x04,
    ASN_TAG_NULL          = 0x05,
    ASN_OBJECT_ID         = 0x06,
    ASN_ENUMERATED        = 0x0a,
    ASN_UTF8STRING        = 0x0c,
    ASN_SEQUENCE          = 0x10,
    ASN_SET               = 0x11,
    ASN_PRINTABLE_STRING  = 0x13,
    ASN_IA5_STRING        = 0x16,
    ASN_UTC_TIME          = 0x17,
    ASN_OTHER_TYPE        = 0x00,
    ASN_RFC822_TYPE       = 0x01,
    ASN_DNS_TYPE          = 0x02,
    ASN_DIR_TYPE          = 0x04,
    ASN_URI_TYPE          = 0x06, /* the value 6 is from GeneralName OID */
    ASN_IP_TYPE           = 0x07, /* the value 7 is from GeneralName OID */
    ASN_GENERALIZED_TIME  = 0x18,
    CRL_EXTENSIONS        = 0xa0,
    ASN_EXTENSIONS        = 0xa3,
    ASN_LONG_LENGTH       = 0x80,
    ASN_INDEF_LENGTH      = 0x80,

    /* ASN_Flags - Bitmask */
    ASN_CONSTRUCTED       = 0x20,
    ASN_APPLICATION       = 0x40,
    ASN_CONTEXT_SPECIFIC  = 0x80,
};

#define ASN_UTC_TIME_SIZE 14
#define ASN_GENERALIZED_TIME_SIZE 16
#define ASN_GENERALIZED_TIME_MAX 68

enum DN_Tags {
    ASN_DN_NULL       = 0x00,
    ASN_COMMON_NAME   = 0x03,   /* CN */
    ASN_SUR_NAME      = 0x04,   /* SN */
    ASN_SERIAL_NUMBER = 0x05,   /* serialNumber */
    ASN_COUNTRY_NAME  = 0x06,   /* C  */
    ASN_LOCALITY_NAME = 0x07,   /* L  */
    ASN_STATE_NAME    = 0x08,   /* ST */
    ASN_ORG_NAME      = 0x0a,   /* O  */
    ASN_ORGUNIT_NAME  = 0x0b,   /* OU */
    ASN_BUS_CAT       = 0x0f,   /* businessCategory */
    ASN_EMAIL_NAME    = 0x98,   /* not oid number there is 97 in 2.5.4.0-97 */

    /* pilot attribute types
     * OID values of 0.9.2342.19200300.100.1.* */
    ASN_USER_ID          = 0x01, /* UID */
    ASN_DOMAIN_COMPONENT = 0x19  /* DC */
};

/* This is the size of the smallest possible PEM header and footer */
extern const int pem_struct_min_sz;

#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
typedef struct WOLFSSL_ObjectInfo {
    int nid;
    int id;
    word32 type;
    const char* sName;
    const char* lName;
} WOLFSSL_ObjectInfo;
extern const size_t wolfssl_object_info_sz;
extern const WOLFSSL_ObjectInfo wolfssl_object_info[];
#endif /* defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL) */

/* DN Tag Strings */
#define WOLFSSL_COMMON_NAME      "/CN="
#define WOLFSSL_LN_COMMON_NAME   "/commonName="
#define WOLFSSL_SUR_NAME         "/SN="
#define WOLFSSL_SERIAL_NUMBER    "/serialNumber="
#define WOLFSSL_COUNTRY_NAME     "/C="
#define WOLFSSL_LN_COUNTRY_NAME  "/countryName="
#define WOLFSSL_LOCALITY_NAME    "/L="
#define WOLFSSL_LN_LOCALITY_NAME "/localityName="
#define WOLFSSL_STATE_NAME       "/ST="
#define WOLFSSL_LN_STATE_NAME    "/stateOrProvinceName="
#define WOLFSSL_ORG_NAME         "/O="
#define WOLFSSL_LN_ORG_NAME      "/organizationName="
#define WOLFSSL_ORGUNIT_NAME     "/OU="
#define WOLFSSL_LN_ORGUNIT_NAME  "/organizationalUnitName="
#define WOLFSSL_DOMAIN_COMPONENT "/DC="
#define WOLFSSL_LN_DOMAIN_COMPONENT "/domainComponent="
#define WOLFSSL_BUS_CAT          "/businessCategory="
#define WOLFSSL_JOI_C            "/jurisdictionC="
#define WOLFSSL_JOI_ST           "/jurisdictionST="
#define WOLFSSL_EMAIL_ADDR       "/emailAddress="

#define WOLFSSL_USER_ID          "/UID="
#define WOLFSSL_DOMAIN_COMPONENT "/DC="

#if defined(WOLFSSL_APACHE_HTTPD)
    /* otherName strings */
    #define WOLFSSL_SN_MS_UPN       "msUPN"
    #define WOLFSSL_LN_MS_UPN       "Microsoft User Principal Name"
    #define WOLFSSL_MS_UPN_SUM 265
    #define WOLFSSL_SN_DNS_SRV      "id-on-dnsSRV"
    #define WOLFSSL_LN_DNS_SRV      "SRVName"
    /* TLS features extension strings */
    #define WOLFSSL_SN_TLS_FEATURE  "tlsfeature"
    #define WOLFSSL_LN_TLS_FEATURE  "TLS Feature"
    #define WOLFSSL_TLS_FEATURE_SUM 92
#endif

/* NIDs */
enum
{
    NID_undef = 0,
    NID_netscape_cert_type = NID_undef,
    NID_des = 66,
    NID_des3 = 67,
    NID_sha256 = 672,
    NID_sha384 = 673,
    NID_sha512 = 674,
    NID_pkcs9_challengePassword = 54,
    NID_hw_name_oid = 73,
    NID_id_pkix_OCSP_basic = 74,
    NID_any_policy = 75,
    NID_anyExtendedKeyUsage = 76,
    NID_givenName = 99,
    NID_initials = 101,
    NID_title = 106,
    NID_description = 107,
    NID_basic_constraints = 133,
    NID_key_usage = 129,     /* 2.5.29.15 */
    NID_ext_key_usage = 151, /* 2.5.29.37 */
    NID_subject_key_identifier = 128,
    NID_authority_key_identifier = 149,
    NID_private_key_usage_period = 130, /* 2.5.29.16 */
    NID_subject_alt_name = 131,
    NID_issuer_alt_name = 132,
    NID_info_access = 69,
    NID_sinfo_access = 79,      /* id-pe 11 */
    NID_name_constraints = 144, /* 2.5.29.30 */
    NID_crl_distribution_points = 145, /* 2.5.29.31 */
    NID_certificate_policies = 146,
    NID_policy_mappings = 147,
    NID_policy_constraints = 150,
    NID_inhibit_any_policy = 168,      /* 2.5.29.54 */
    NID_tlsfeature = 1020,             /* id-pe 24 */
    NID_commonName = 0x03,             /* matches ASN_COMMON_NAME in asn.h */
    NID_buildingName = 1494,


    NID_surname = 0x04,                /* SN */
    NID_serialNumber = 0x05,           /* serialNumber */
    NID_countryName = 0x06,            /* C  */
    NID_localityName = 0x07,           /* L  */
    NID_stateOrProvinceName = 0x08,    /* ST */
    NID_organizationName = 0x0a,       /* O  */
    NID_organizationalUnitName = 0x0b, /* OU */
    NID_jurisdictionCountryName = 0xc,
    NID_jurisdictionStateOrProvinceName = 0xd,
    NID_businessCategory = ASN_BUS_CAT,
    NID_domainComponent = ASN_DOMAIN_COMPONENT,
    NID_userId = 458,
    NID_emailAddress = 0x30,           /* emailAddress */
    NID_id_on_dnsSRV = 82,             /* 1.3.6.1.5.5.7.8.7 */
    NID_ms_upn = 265,                  /* 1.3.6.1.4.1.311.20.2.3 */

    NID_X9_62_prime_field = 406        /* 1.2.840.10045.1.1 */
};

enum ECC_TYPES
{
    ECC_PREFIX_0 = 160,
    ECC_PREFIX_1 = 161
};

#ifdef WOLFSSL_CERT_PIV
    enum PIV_Tags {
        ASN_PIV_CERT          = 0x0A,
        ASN_PIV_NONCE         = 0x0B,
        ASN_PIV_SIGNED_NONCE  = 0x0C,

        ASN_PIV_TAG_CERT      = 0x70,
        ASN_PIV_TAG_CERT_INFO = 0x71,
        ASN_PIV_TAG_MSCUID    = 0x72,
        ASN_PIV_TAG_ERR_DET   = 0xFE,

        /* certificate info masks */
        ASN_PIV_CERT_INFO_COMPRESSED = 0x03,
        ASN_PIV_CERT_INFO_ISX509     = 0x04,
    };
#endif /* WOLFSSL_CERT_PIV */


#define ASN_JOI_PREFIX_SZ       10
#define ASN_JOI_PREFIX          "\x2b\x06\x01\x04\x01\x82\x37\x3c\x02\x01"
#define ASN_JOI_C               0x3
#define ASN_JOI_ST              0x2

#ifndef WC_ASN_NAME_MAX
    #ifdef OPENSSL_EXTRA
        #define WC_ASN_NAME_MAX 300
    #else
        #define WC_ASN_NAME_MAX 256
    #endif
#endif
#define ASN_NAME_MAX WC_ASN_NAME_MAX

enum Misc_ASN {
    MAX_SALT_SIZE       =  64,     /* MAX PKCS Salt length */
    MAX_IV_SIZE         =  64,     /* MAX PKCS Iv length */
    ASN_BOOL_SIZE       =   2,     /* including type */
    ASN_ECC_HEADER_SZ   =   2,     /* String type + 1 byte len */
    ASN_ECC_CONTEXT_SZ  =   2,     /* Content specific type + 1 byte len */
#ifdef NO_SHA
    KEYID_SIZE          = WC_SHA256_DIGEST_SIZE,
#else
    KEYID_SIZE          = WC_SHA_DIGEST_SIZE,
#endif
    RSA_INTS            =   8,     /* RSA ints in private key */
    DSA_INTS            =   5,     /* DSA ints in private key */
    MIN_DATE_SIZE       =  12,
    MAX_DATE_SIZE       =  32,
    ASN_GEN_TIME_SZ     =  15,     /* 7 numbers * 2 + Zulu tag */
#ifndef NO_RSA
    MAX_ENCODED_SIG_SZ  = 512,
#elif defined(HAVE_ECC)
    MAX_ENCODED_SIG_SZ  = 140,
#elif defined(HAVE_CURVE448)
    MAX_ENCODED_SIG_SZ  = 114,
#else
    MAX_ENCODED_SIG_SZ  =  64,
#endif
    MAX_SIG_SZ          = 256,
    MAX_ALGO_SZ         =  20,
    MAX_SHORT_SZ        =   6,     /* asn int + byte len + 4 byte length */
    MAX_SEQ_SZ          =   5,     /* enum(seq | con) + length(4) */
    MAX_SET_SZ          =   5,     /* enum(set | con) + length(4) */
    MAX_OCTET_STR_SZ    =   5,     /* enum(set | con) + length(4) */
    MAX_EXP_SZ          =   5,     /* enum(contextspec|con|exp) + length(4) */
    MAX_PRSTR_SZ        =   5,     /* enum(prstr) + length(4) */
    MAX_VERSION_SZ      =   5,     /* enum + id + version(byte) + (header(2))*/
    MAX_ENCODED_DIG_ASN_SZ= 9,     /* enum(bit or octet) + length(4) */
    MAX_ENCODED_DIG_SZ  =  64 + MAX_ENCODED_DIG_ASN_SZ, /* asn header + sha512 */
    MAX_RSA_INT_SZ      = 517,     /* RSA raw sz 4096 for bits + tag + len(4) */
    MAX_DSA_INT_SZ      = 261,     /* DSA raw sz 2048 for bits + tag + len(4) */
    MAX_NTRU_KEY_SZ     = 610,     /* NTRU 112 bit public key */
    MAX_NTRU_ENC_SZ     = 628,     /* NTRU 112 bit DER public encoding */
    MAX_LENGTH_SZ       =   4,     /* Max length size for DER encoding */
    MAX_RSA_E_SZ        =  16,     /* Max RSA public e size */
    MAX_CA_SZ           =  32,     /* Max encoded CA basic constraint length */
    MAX_SN_SZ           =  35,     /* Max encoded serial number (INT) length */
    MAX_DER_DIGEST_SZ     = MAX_ENCODED_DIG_SZ + MAX_ALGO_SZ + MAX_SEQ_SZ,
                            /* Maximum DER digest size */
    MAX_DER_DIGEST_ASN_SZ = MAX_ENCODED_DIG_ASN_SZ + MAX_ALGO_SZ + MAX_SEQ_SZ,
                            /* Maximum DER digest ASN header size */
                            /* Max X509 header length indicates the max length + 2 ('\n', '\0') */
    MAX_X509_HEADER_SZ  = (37 + 2), /* Maximum PEM Header/Footer Size */
#ifdef WOLFSSL_CERT_GEN
    #ifdef WOLFSSL_CERT_REQ
                          /* Max encoded cert req attributes length */
        MAX_ATTRIB_SZ   = MAX_SEQ_SZ * 3 + (11 + MAX_SEQ_SZ) * 2 +
                          MAX_PRSTR_SZ + CTC_NAME_SIZE, /* 11 is the OID size */
    #endif
    #if defined(WOLFSSL_ALT_NAMES) || defined(WOLFSSL_CERT_EXT)
        MAX_EXTENSIONS_SZ   = 1 + MAX_LENGTH_SZ + CTC_MAX_ALT_SIZE,
    #else
        MAX_EXTENSIONS_SZ   = 1 + MAX_LENGTH_SZ + MAX_CA_SZ,
    #endif
                                   /* Max total extensions, id + len + others */
#endif
#if defined(WOLFSSL_CERT_EXT) || defined(OPENSSL_EXTRA) || \
        defined(HAVE_PKCS7) || defined(OPENSSL_EXTRA_X509_SMALL)
    MAX_OID_SZ          = 32,      /* Max DER length of OID*/
    MAX_OID_STRING_SZ   = 64,      /* Max string length representation of OID*/
#endif
#ifdef WOLFSSL_CERT_EXT
    MAX_KID_SZ          = 45,      /* Max encoded KID length (SHA-256 case) */
    MAX_KEYUSAGE_SZ     = 18,      /* Max encoded Key Usage length */
    MAX_EXTKEYUSAGE_SZ  = 12 + (6 * (8 + 2)) +
                          CTC_MAX_EKU_OID_SZ, /* Max encoded ExtKeyUsage
                          (SEQ/LEN + OBJID + OCTSTR/LEN + SEQ +
                          (6 * (SEQ + OID))) */
    MAX_CERTPOL_NB      = CTC_MAX_CERTPOL_NB,/* Max number of Cert Policy */
    MAX_CERTPOL_SZ      = CTC_MAX_CERTPOL_SZ,
#endif
    MAX_AIA_SZ          = 2,       /* Max Authority Info Access extension size*/
    OCSP_NONCE_EXT_SZ   = 35,      /* OCSP Nonce Extension size */
    MAX_OCSP_EXT_SZ     = 58,      /* Max OCSP Extension length */
    MAX_OCSP_NONCE_SZ   = 16,      /* OCSP Nonce size           */
    EIGHTK_BUF          = 8192,    /* Tmp buffer size           */
    MAX_PUBLIC_KEY_SZ   = MAX_NTRU_ENC_SZ + MAX_ALGO_SZ + MAX_SEQ_SZ * 2,
                                   /* use bigger NTRU size */
#ifdef WOLFSSL_ENCRYPTED_KEYS
    HEADER_ENCRYPTED_KEY_SIZE = 88,/* Extra header size for encrypted key */
#else
    HEADER_ENCRYPTED_KEY_SIZE = 0,
#endif
    TRAILING_ZERO       = 1,       /* Used for size of zero pad */
    ASN_TAG_SZ          = 1,       /* single byte ASN.1 tag */
    MIN_VERSION_SZ      = 3,       /* Min bytes needed for GetMyVersion */
    MAX_X509_VERSION    = 3,       /* Max X509 version allowed */
    MIN_X509_VERSION    = 0,       /* Min X509 version allowed */
    WOLFSSL_X509_V1     = 0,
    WOLFSSL_X509_V2     = 1,
    WOLFSSL_X509_V3     = 2,
#if defined(OPENSSL_ALL)  || defined(WOLFSSL_MYSQL_COMPATIBLE) || \
    defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY) || \
    defined(OPENSSL_EXTRA) || defined(HAVE_PKCS7)
    MAX_TIME_STRING_SZ  = 25,      /* Max length of formatted time string */
#endif

    PKCS5_SALT_SZ       = 8,

    PEM_LINE_SZ        = 64,               /* Length of Base64 encoded line, not including new line */
    PEM_LINE_LEN       = PEM_LINE_SZ + 12, /* PEM line max + fudge */
};

#ifndef WC_MAX_NAME_ENTRIES
    /* entries added to x509 name struct */
    #define WC_MAX_NAME_ENTRIES 13
#endif
#define MAX_NAME_ENTRIES WC_MAX_NAME_ENTRIES


enum Oid_Types {
    oidHashType         = 0,
    oidSigType          = 1,
    oidKeyType          = 2,
    oidCurveType        = 3,
    oidBlkType          = 4,
    oidOcspType         = 5,
    oidCertExtType      = 6,
    oidCertAuthInfoType = 7,
    oidCertPolicyType   = 8,
    oidCertAltNameType  = 9,
    oidCertKeyUseType   = 10,
    oidKdfType          = 11,
    oidKeyWrapType      = 12,
    oidCmsKeyAgreeType  = 13,
    oidPBEType          = 14,
    oidHmacType         = 15,
    oidCompressType     = 16,
    oidCertNameType     = 17,
    oidTlsExtType       = 18,
    oidCrlExtType       = 19,
    oidCsrAttrType      = 20,
    oidIgnoreType
};


enum Hash_Sum  {
    MD2h      = 646,
    MD5h      = 649,
    SHAh      =  88,
    SHA224h   = 417,
    SHA256h   = 414,
    SHA384h   = 415,
    SHA512h   = 416,
    SHA3_224h = 420,
    SHA3_256h = 421,
    SHA3_384h = 422,
    SHA3_512h = 423
};


#if !defined(NO_DES3) || !defined(NO_AES)
enum Block_Sum {
#ifdef WOLFSSL_AES_128
    AES128CBCb = 414,
    AES128GCMb = 418,
    AES128CCMb = 419,
#endif
#ifdef WOLFSSL_AES_192
    AES192CBCb = 434,
    AES192GCMb = 438,
    AES192CCMb = 439,
#endif
#ifdef WOLFSSL_AES_256
    AES256CBCb = 454,
    AES256GCMb = 458,
    AES256CCMb = 459,
#endif
#ifndef NO_DES3
    DESb       = 69,
    DES3b      = 652
#endif
};
#endif /* !NO_DES3 || !NO_AES */


enum Key_Sum {
    DSAk     = 515,
    RSAk     = 645,
    NTRUk    = 274,
    ECDSAk   = 518,
    ED25519k = 256,
    ED448k   = 257,
    DHk      = 647, /* dhKeyAgreement OID: 1.2.840.113549.1.3.1 */
};

#if !defined(NO_AES) || defined(HAVE_PKCS7)
enum KeyWrap_Sum {
#ifdef WOLFSSL_AES_128
    AES128_WRAP  = 417,
#endif
#ifdef WOLFSSL_AES_192
    AES192_WRAP  = 437,
#endif
#ifdef WOLFSSL_AES_256
    AES256_WRAP  = 457,
#endif
#ifdef HAVE_PKCS7
    PWRI_KEK_WRAP = 680  /*id-alg-PWRI-KEK, 1.2.840.113549.1.9.16.3.9 */
#endif
};
#endif /* !NO_AES || PKCS7 */

enum Key_Agree {
    dhSinglePass_stdDH_sha1kdf_scheme   = 464,
    dhSinglePass_stdDH_sha224kdf_scheme = 188,
    dhSinglePass_stdDH_sha256kdf_scheme = 189,
    dhSinglePass_stdDH_sha384kdf_scheme = 190,
    dhSinglePass_stdDH_sha512kdf_scheme = 191,
};



enum KDF_Sum {
    PBKDF2_OID = 660
};


enum HMAC_Sum {
    HMAC_SHA224_OID   = 652,
    HMAC_SHA256_OID   = 653,
    HMAC_SHA384_OID   = 654,
    HMAC_SHA512_OID   = 655,
    HMAC_SHA3_224_OID = 426,
    HMAC_SHA3_256_OID = 427,
    HMAC_SHA3_384_OID = 428,
    HMAC_SHA3_512_OID = 429
};


enum Extensions_Sum {
    BASIC_CA_OID    = 133,
    ALT_NAMES_OID   = 131,
    CRL_DIST_OID    = 145,
    AUTH_INFO_OID   = 69, /* id-pe 1 */
    AUTH_KEY_OID    = 149,
    SUBJ_KEY_OID    = 128,
    CERT_POLICY_OID = 146,
    KEY_USAGE_OID   = 129,  /* 2.5.29.15 */
    INHIBIT_ANY_OID = 168,  /* 2.5.29.54 */
    EXT_KEY_USAGE_OID         = 151, /* 2.5.29.37 */
    NAME_CONS_OID             = 144, /* 2.5.29.30 */
    PRIV_KEY_USAGE_PERIOD_OID = 130, /* 2.5.29.16 */
    SUBJECT_INFO_ACCESS       = 79,  /* id-pe 11 */
    POLICY_MAP_OID            = 147,
    POLICY_CONST_OID          = 150,
    ISSUE_ALT_NAMES_OID       = 132,
    TLS_FEATURE_OID           = 92,  /* id-pe 24 */
    NETSCAPE_CT_OID           = 753, /* 2.16.840.1.113730.1.1 */
    OCSP_NOCHECK_OID          = 121  /* 1.3.6.1.5.5.7.48.1.5
                                         id-pkix-ocsp-nocheck */
};

enum CertificatePolicy_Sum {
    CP_ANY_OID      = 146  /* id-ce 32 0 */
};

enum SepHardwareName_Sum {
    HW_NAME_OID     = 79   /* 1.3.6.1.5.5.7.8.4 from RFC 4108*/
};

enum AuthInfo_Sum {
    AIA_OCSP_OID      = 116, /* 1.3.6.1.5.5.7.48.1 */
    AIA_CA_ISSUER_OID = 117  /* 1.3.6.1.5.5.7.48.2 */
};

enum ExtKeyUsage_Sum { /* From RFC 5280 */
    EKU_ANY_OID         = 151, /* 2.5.29.37.0, anyExtendedKeyUsage         */
    EKU_SERVER_AUTH_OID = 71,  /* 1.3.6.1.5.5.7.3.1, id-kp-serverAuth      */
    EKU_CLIENT_AUTH_OID = 72,  /* 1.3.6.1.5.5.7.3.2, id-kp-clientAuth      */
    EKU_CODESIGNING_OID = 73,  /* 1.3.6.1.5.5.7.3.3, id-kp-codeSigning     */
    EKU_EMAILPROTECT_OID = 74, /* 1.3.6.1.5.5.7.3.4, id-kp-emailProtection */
    EKU_TIMESTAMP_OID   = 78,  /* 1.3.6.1.5.5.7.3.8, id-kp-timeStamping    */
    EKU_OCSP_SIGN_OID   = 79   /* 1.3.6.1.5.5.7.3.9, id-kp-OCSPSigning     */
};

#ifdef HAVE_LIBZ
enum CompressAlg_Sum {
    ZLIBc = 679  /* 1.2.840.113549.1.9.16.3.8, id-alg-zlibCompress */
};
#endif

enum VerifyType {
    NO_VERIFY   = 0,
    VERIFY      = 1,
    VERIFY_CRL  = 2,
    VERIFY_OCSP = 3,
    VERIFY_NAME = 4,
    VERIFY_SKIP_DATE = 5,
};

#ifdef WOLFSSL_CERT_EXT
enum KeyIdType {
    SKID_TYPE = 0,
    AKID_TYPE = 1
};
#endif

#ifdef WOLFSSL_CERT_REQ
enum CsrAttrType {
    CHALLENGE_PASSWORD_OID = 659,
    SERIAL_NUMBER_OID = 94,
    EXTENSION_REQUEST_OID = 666,
};
#endif

/* Key usage extension bits (based on RFC 5280) */
#define KEYUSE_DIGITAL_SIG    0x0080
#define KEYUSE_CONTENT_COMMIT 0x0040
#define KEYUSE_KEY_ENCIPHER   0x0020
#define KEYUSE_DATA_ENCIPHER  0x0010
#define KEYUSE_KEY_AGREE      0x0008
#define KEYUSE_KEY_CERT_SIGN  0x0004
#define KEYUSE_CRL_SIGN       0x0002
#define KEYUSE_ENCIPHER_ONLY  0x0001
#define KEYUSE_DECIPHER_ONLY  0x8000

/* Extended Key Usage bits (internal mapping only) */
#define EXTKEYUSE_USER        0x80
#define EXTKEYUSE_OCSP_SIGN   0x40
#define EXTKEYUSE_TIMESTAMP   0x20
#define EXTKEYUSE_EMAILPROT   0x10
#define EXTKEYUSE_CODESIGN    0x08
#define EXTKEYUSE_CLIENT_AUTH 0x04
#define EXTKEYUSE_SERVER_AUTH 0x02
#define EXTKEYUSE_ANY         0x01

typedef struct DNS_entry   DNS_entry;

struct DNS_entry {
    DNS_entry* next;   /* next on DNS list */
    int        type;   /* i.e. ASN_DNS_TYPE */
    int        len;    /* actual DNS len */
    char*      name;   /* actual DNS name */
};


typedef struct Base_entry  Base_entry;

struct Base_entry {
    Base_entry* next;   /* next on name base list */
    char*       name;   /* actual name base */
    int         nameSz; /* name length */
    byte        type;   /* Name base type (DNS or RFC822) */
};


enum SignatureState {
    SIG_STATE_BEGIN,
    SIG_STATE_HASH,
    SIG_STATE_KEY,
    SIG_STATE_DO,
    SIG_STATE_CHECK,
};


#ifdef HAVE_PK_CALLBACKS
#ifdef HAVE_ECC
    typedef int (*wc_CallbackEccVerify)(
           const unsigned char* sig, unsigned int sigSz,
           const unsigned char* hash, unsigned int hashSz,
           const unsigned char* keyDer, unsigned int keySz,
           int* result, void* ctx);
#endif
#ifndef NO_RSA
    typedef int (*wc_CallbackRsaVerify)(
           unsigned char* sig, unsigned int sigSz,
           unsigned char** out,
           const unsigned char* keyDer, unsigned int keySz,
           void* ctx);
#endif
#endif /* HAVE_PK_CALLBACKS */

struct SignatureCtx {
    void* heap;
    byte* digest;
#ifndef NO_RSA
    byte* out;
#endif
#if !(defined(NO_RSA) && defined(NO_DSA))
    byte* sigCpy;
#endif
#if defined(HAVE_ECC) || defined(HAVE_ED25519) || defined(HAVE_ED448) || \
    !defined(NO_DSA)
    int verify;
#endif
    union {
    #ifndef NO_RSA
        struct RsaKey*      rsa;
    #endif
    #ifndef NO_DSA
        struct DsaKey*      dsa;
    #endif
    #ifdef HAVE_ECC
        struct ecc_key*     ecc;
    #endif
    #ifdef HAVE_ED25519
        struct ed25519_key* ed25519;
    #endif
    #ifdef HAVE_ED448
        struct ed448_key* ed448;
    #endif
        void* ptr;
    } key;
    int devId;
    int state;
    int typeH;
    int digestSz;
    word32 keyOID;
#ifdef WOLFSSL_ASYNC_CRYPT
    WC_ASYNC_DEV* asyncDev;
    void* asyncCtx;
#endif

#ifdef HAVE_PK_CALLBACKS
#ifdef HAVE_ECC
    wc_CallbackEccVerify pkCbEcc;
    void* pkCtxEcc;
#endif
#ifndef NO_RSA
    wc_CallbackRsaVerify pkCbRsa;
    void* pkCtxRsa;
#endif
#endif /* HAVE_PK_CALLBACKS */
#ifndef NO_RSA
#ifdef WOLFSSL_RENESAS_TSIP_TLS
    byte verifyByTSIP;
    word32 certBegin;
    word32 pubkey_n_start;
    word32 pubkey_n_len;
    word32 pubkey_e_start;
    word32 pubkey_e_len;
#endif
#endif
};

enum CertSignState {
    CERTSIGN_STATE_BEGIN,
    CERTSIGN_STATE_DIGEST,
    CERTSIGN_STATE_ENCODE,
    CERTSIGN_STATE_DO,
};

struct CertSignCtx {
    byte* sig;
    byte* digest;
    #ifndef NO_RSA
        byte* encSig;
        int encSigSz;
    #endif
    int state; /* enum CertSignState */
};

#ifndef WOLFSSL_MAX_PATH_LEN
    /* RFC 5280 Section 6.1.2. "Initialization" - item (k) defines
     *     (k)  max_path_length:  this integer is initialized to "n", is
     *     decremented for each non-self-issued certificate in the path,
     *     and may be reduced to the value in the path length constraint
     *     field within the basic constraints extension of a CA
     *     certificate.
     *
     * wolfSSL has arbitrarily selected the value 127 for "n" in the above
     * description. Users can modify the maximum path length by setting
     * WOLFSSL_MAX_PATH_LEN to a preferred value at build time
     */
    #define WOLFSSL_MAX_PATH_LEN 127
#endif

typedef struct DecodedCert DecodedCert;
typedef struct Signer      Signer;
#ifdef WOLFSSL_TRUST_PEER_CERT
typedef struct TrustedPeerCert TrustedPeerCert;
#endif /* WOLFSSL_TRUST_PEER_CERT */
typedef struct SignatureCtx SignatureCtx;
typedef struct CertSignCtx  CertSignCtx;


struct DecodedCert {
    const byte* publicKey;
    word32  pubKeySize;
    int     pubKeyStored;
    word32  certBegin;               /* offset to start of cert          */
    word32  sigIndex;                /* offset to start of signature     */
    word32  sigLength;               /* length of signature              */
    word32  signatureOID;            /* sum of algorithm object id       */
    word32  keyOID;                  /* sum of key algo  object id       */
    int     version;                 /* cert version, 1 or 3             */
    DNS_entry* altNames;             /* alt names list of dns entries    */
#ifndef IGNORE_NAME_CONSTRAINTS
    DNS_entry* altEmailNames;        /* alt names list of RFC822 entries */
    DNS_entry* altDirNames;          /* alt names list of DIR entries    */
    Base_entry* permittedNames;      /* Permitted name bases             */
    Base_entry* excludedNames;       /* Excluded name bases              */
#endif /* IGNORE_NAME_CONSTRAINTS */
    byte    subjectHash[KEYID_SIZE]; /* hash of all Names                */
    byte    issuerHash[KEYID_SIZE];  /* hash of all Names                */
#ifdef HAVE_OCSP
    byte    subjectKeyHash[KEYID_SIZE]; /* hash of the public Key         */
    byte    issuerKeyHash[KEYID_SIZE]; /* hash of the public Key         */
#endif /* HAVE_OCSP */
    const byte* signature;           /* not owned, points into raw cert  */
    char*   subjectCN;               /* CommonName                       */
    int     subjectCNLen;            /* CommonName Length                */
    char    subjectCNEnc;            /* CommonName Encoding              */
    char    issuer[ASN_NAME_MAX];    /* full name including common name  */
    char    subject[ASN_NAME_MAX];   /* full name including common name  */
    int     verify;                  /* Default to yes, but could be off */
    const byte* source;              /* byte buffer holder cert, NOT owner */
    word32  srcIdx;                  /* current offset into buffer       */
    word32  maxIdx;                  /* max offset based on init size    */
    void*   heap;                    /* for user memory overrides        */
    byte    serial[EXTERNAL_SERIAL_SIZE];  /* raw serial number          */
    int     serialSz;                /* raw serial bytes stored */
    const byte* extensions;          /* not owned, points into raw cert  */
    int     extensionsSz;            /* length of cert extensions */
    word32  extensionsIdx;           /* if want to go back and parse later */
    const byte* extAuthInfo;         /* Authority Information Access URI */
    int     extAuthInfoSz;           /* length of the URI                */
#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
    const byte* extAuthInfoCaIssuer; /* Authority Info Access caIssuer URI */
    int     extAuthInfoCaIssuerSz;   /* length of the caIssuer URI         */
#endif
    const byte* extCrlInfo;          /* CRL Distribution Points          */
    int     extCrlInfoSz;            /* length of the URI                */
    byte    extSubjKeyId[KEYID_SIZE]; /* Subject Key ID                  */
    byte    extAuthKeyId[KEYID_SIZE]; /* Authority Key ID                */
    byte    pathLength;              /* CA basic constraint path length  */
    byte    maxPathLen;              /* max_path_len see RFC 5280 section
                                      * 6.1.2 "Initialization" - (k) for
                                      * description of max_path_len */
    word16  extKeyUsage;             /* Key usage bitfield               */
    byte    extExtKeyUsage;          /* Extended Key usage bitfield      */

#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
    const byte* extExtKeyUsageSrc;
    word32  extExtKeyUsageSz;
    word32  extExtKeyUsageCount;
    const byte* extAuthKeyIdSrc;
    word32  extAuthKeyIdSz;
    const byte* extSubjKeyIdSrc;
    word32  extSubjKeyIdSz;
#endif

#if defined(HAVE_ECC) || defined(HAVE_ED25519) || defined(HAVE_ED448)
    word32  pkCurveOID;           /* Public Key's curve OID */
#endif /* HAVE_ECC */
    const byte* beforeDate;
    int     beforeDateLen;
    const byte* afterDate;
    int     afterDateLen;
#if defined(HAVE_PKCS7) || defined(WOLFSSL_CERT_EXT)
    const byte* issuerRaw;           /* pointer to issuer inside source */
    int     issuerRawLen;
#endif
#if !defined(IGNORE_NAME_CONSTRAINTS) || defined(WOLFSSL_CERT_EXT)
    const byte* subjectRaw;          /* pointer to subject inside source */
    int     subjectRawLen;
#endif
#if defined(WOLFSSL_CERT_GEN) || defined(WOLFSSL_CERT_EXT)
    /* easy access to subject info for other sign */
    char*   subjectSN;
    int     subjectSNLen;
    char    subjectSNEnc;
    char*   subjectC;
    int     subjectCLen;
    char    subjectCEnc;
    char*   subjectL;
    int     subjectLLen;
    char    subjectLEnc;
    char*   subjectST;
    int     subjectSTLen;
    char    subjectSTEnc;
    char*   subjectO;
    int     subjectOLen;
    char    subjectOEnc;
    char*   subjectOU;
    int     subjectOULen;
    char    subjectOUEnc;
    char*   subjectSND;
    int     subjectSNDLen;
    char    subjectSNDEnc;
#ifdef WOLFSSL_CERT_EXT
    char*   subjectBC;
    int     subjectBCLen;
    char    subjectBCEnc;
    char*   subjectJC;
    int     subjectJCLen;
    char    subjectJCEnc;
    char*   subjectJS;
    int     subjectJSLen;
    char    subjectJSEnc;
#endif
    char*   subjectEmail;
    int     subjectEmailLen;
#endif /* WOLFSSL_CERT_GEN */
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
    /* WOLFSSL_X509_NAME structures (used void* to avoid including ssl.h) */
    void* issuerName;
    void* subjectName;
#endif /* OPENSSL_EXTRA */
#ifdef WOLFSSL_SEP
    int     deviceTypeSz;
    byte*   deviceType;
    int     hwTypeSz;
    byte*   hwType;
    int     hwSerialNumSz;
    byte*   hwSerialNum;
#endif /* WOLFSSL_SEP */
#ifdef WOLFSSL_CERT_EXT
    char    extCertPolicies[MAX_CERTPOL_NB][MAX_CERTPOL_SZ];
    int     extCertPoliciesNb;
#endif /* defined(WOLFSSL_CERT_GEN) || defined(WOLFSSL_CERT_EXT) */

#ifdef WOLFSSL_CERT_REQ
    /* CSR attributes */
    char*   cPwd; /* challengePassword */
    int     cPwdLen;
    char*   sNum; /* Serial Number */
    int     sNumLen;
#endif /* WOLFSSL_CERT_REQ */

    Signer* ca;
#ifndef NO_CERTS
    SignatureCtx sigCtx;
#endif
#ifdef WOLFSSL_RENESAS_TSIP
    byte*  tsip_encRsaKeyIdx;
#endif

    int badDate;
    int criticalExt;

    /* Option Bits */
    byte subjectCNStored : 1;      /* have we saved a copy we own */
    byte extSubjKeyIdSet : 1;      /* Set when the SKID was read from cert */
    byte extAuthKeyIdSet : 1;      /* Set when the AKID was read from cert */
#ifndef IGNORE_NAME_CONSTRAINTS
    byte extNameConstraintSet : 1;
#endif
    byte isCA : 1;                 /* CA basic constraint true */
    byte pathLengthSet : 1;        /* CA basic const path length set */
    byte weOwnAltNames : 1;        /* altNames haven't been given to copy */
    byte extKeyUsageSet : 1;
    byte extExtKeyUsageSet : 1;    /* Extended Key Usage set */
#ifdef HAVE_OCSP
    byte ocspNoCheckSet : 1;       /* id-pkix-ocsp-nocheck set */
#endif
    byte extCRLdistSet : 1;
    byte extAuthInfoSet : 1;
    byte extBasicConstSet : 1;
    byte extSubjAltNameSet : 1;
    byte inhibitAnyOidSet : 1;
    byte selfSigned : 1;           /* Indicates subject and issuer are same */
#if defined(WOLFSSL_SEP) || defined(WOLFSSL_QT)
    byte extCertPolicySet : 1;
#endif
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
    byte extCRLdistCrit : 1;
    byte extAuthInfoCrit : 1;
    byte extBasicConstCrit : 1;
    byte extSubjAltNameCrit : 1;
    byte extAuthKeyIdCrit : 1;
    #ifndef IGNORE_NAME_CONSTRAINTS
        byte extNameConstraintCrit : 1;
    #endif
    byte extSubjKeyIdCrit : 1;
    byte extKeyUsageCrit : 1;
    byte extExtKeyUsageCrit : 1;
#endif /* OPENSSL_EXTRA */
#if defined(WOLFSSL_SEP) || defined(WOLFSSL_QT)
    byte extCertPolicyCrit : 1;
#endif
#ifdef WOLFSSL_CERT_REQ
    byte isCSR : 1;                /* Do we intend on parsing a CSR? */
#endif
};


#ifdef NO_SHA
    #define SIGNER_DIGEST_SIZE WC_SHA256_DIGEST_SIZE
#else
    #define SIGNER_DIGEST_SIZE WC_SHA_DIGEST_SIZE
#endif

/* CA Signers */
/* if change layout change PERSIST_CERT_CACHE functions too */
struct Signer {
    word32  pubKeySize;
    word32  keyOID;                  /* key type */
    word16  keyUsage;
    byte    maxPathLen;
    byte    pathLength;
    byte    pathLengthSet : 1;
    byte    selfSigned : 1;
    const byte* publicKey;
    int     nameLen;
    char*   name;                    /* common name */
#ifndef IGNORE_NAME_CONSTRAINTS
        Base_entry* permittedNames;
        Base_entry* excludedNames;
#endif /* IGNORE_NAME_CONSTRAINTS */
    byte    subjectNameHash[SIGNER_DIGEST_SIZE];
                                     /* sha hash of names in certificate */
    #ifndef NO_SKID
        byte    subjectKeyIdHash[SIGNER_DIGEST_SIZE];
                                     /* sha hash of names in certificate */
    #endif
    #ifdef HAVE_OCSP
        byte subjectKeyHash[KEYID_SIZE];
    #endif
#ifdef WOLFSSL_SIGNER_DER_CERT
    DerBuffer* derCert;
#endif
#ifdef WOLFSSL_RENESAS_TSIP_TLS
    word32 cm_idx;
#endif
    Signer* next;
};


#ifdef WOLFSSL_TRUST_PEER_CERT
/* used for having trusted peer certs rather then CA */
struct TrustedPeerCert {
    int     nameLen;
    char*   name;                    /* common name */
    #ifndef IGNORE_NAME_CONSTRAINTS
        Base_entry* permittedNames;
        Base_entry* excludedNames;
    #endif /* IGNORE_NAME_CONSTRAINTS */
    byte    subjectNameHash[SIGNER_DIGEST_SIZE];
                                     /* sha hash of names in certificate */
    #ifndef NO_SKID
        byte    subjectKeyIdHash[SIGNER_DIGEST_SIZE];
                                     /* sha hash of names in certificate */
    #endif
    word32 sigLen;
    byte*  sig;
    struct TrustedPeerCert* next;
};
#endif /* WOLFSSL_TRUST_PEER_CERT */


/* for testing or custom openssl wrappers */
#if defined(WOLFSSL_TEST_CERT) || defined(OPENSSL_EXTRA) || \
    defined(OPENSSL_EXTRA_X509_SMALL)
    #define WOLFSSL_ASN_API WOLFSSL_API
#else
    #define WOLFSSL_ASN_API WOLFSSL_LOCAL
#endif

#ifdef HAVE_SMIME
#define MIME_HEADER_ASCII_MIN   33
#define MIME_HEADER_ASCII_MAX   126

typedef struct MimeParam MimeParam;
typedef struct MimeHdr MimeHdr;

struct MimeParam
{
    MimeParam*  next;
    char*       attribute;
    char*       value;
};

struct MimeHdr
{
    MimeHdr*    next;
    MimeParam*  params;
    char*       name;
    char*       body;
};

typedef enum MimeTypes
{
    MIME_HDR,
    MIME_PARAM
} MimeTypes;

typedef enum MimeStatus
{
    MIME_NAMEATTR,
    MIME_BODYVAL
} MimeStatus;
#endif /* HAVE_SMIME */


WOLFSSL_LOCAL int CalcHashId(const byte* data, word32 len, byte* hash);
WOLFSSL_LOCAL int GetName(DecodedCert* cert, int nameType, int maxIdx);

WOLFSSL_ASN_API int wc_BerToDer(const byte* ber, word32 berSz, byte* der,
                                word32* derSz);

WOLFSSL_ASN_API void FreeAltNames(DNS_entry*, void*);
#ifndef IGNORE_NAME_CONSTRAINTS
    WOLFSSL_ASN_API void FreeNameSubtrees(Base_entry*, void*);
#endif /* IGNORE_NAME_CONSTRAINTS */
WOLFSSL_ASN_API void InitDecodedCert(DecodedCert*, const byte*, word32, void*);
WOLFSSL_ASN_API void FreeDecodedCert(DecodedCert*);
WOLFSSL_ASN_API int  ParseCert(DecodedCert*, int type, int verify, void* cm);

WOLFSSL_LOCAL int DecodePolicyOID(char *o, word32 oSz,
                                  const byte *in, word32 inSz);
WOLFSSL_LOCAL int EncodePolicyOID(byte *out, word32 *outSz,
                                  const char *in, void* heap);
WOLFSSL_API int CheckCertSignature(const byte*,word32,void*,void* cm);
WOLFSSL_LOCAL int CheckCertSignaturePubKey(const byte* cert, word32 certSz,
        void* heap, const byte* pubKey, word32 pubKeySz, int pubKeyOID);
#ifdef WOLFSSL_CERT_REQ
WOLFSSL_LOCAL int CheckCSRSignaturePubKey(const byte* cert, word32 certSz, void* heap,
        const byte* pubKey, word32 pubKeySz, int pubKeyOID);
#endif /* WOLFSSL_CERT_REQ */
WOLFSSL_LOCAL int AddSignature(byte* buf, int bodySz, const byte* sig, int sigSz,
                        int sigAlgoType);
WOLFSSL_LOCAL int ParseCertRelative(DecodedCert*,int type,int verify,void* cm);
WOLFSSL_LOCAL int DecodeToKey(DecodedCert*, int verify);
WOLFSSL_LOCAL int wc_GetPubX509(DecodedCert* cert, int verify, int* badDate);

WOLFSSL_LOCAL const byte* OidFromId(word32 id, word32 type, word32* oidSz);
WOLFSSL_LOCAL Signer* MakeSigner(void*);
WOLFSSL_LOCAL void    FreeSigner(Signer*, void*);
WOLFSSL_LOCAL void    FreeSignerTable(Signer**, int, void*);
#ifdef WOLFSSL_TRUST_PEER_CERT
WOLFSSL_LOCAL void    FreeTrustedPeer(TrustedPeerCert*, void*);
WOLFSSL_LOCAL void    FreeTrustedPeerTable(TrustedPeerCert**, int, void*);
#endif /* WOLFSSL_TRUST_PEER_CERT */

WOLFSSL_ASN_API int ToTraditional(byte* buffer, word32 length);
WOLFSSL_ASN_API int ToTraditional_ex(byte* buffer, word32 length,
                                     word32* algId);
WOLFSSL_LOCAL int ToTraditionalInline(const byte* input, word32* inOutIdx,
                                      word32 length);
WOLFSSL_LOCAL int ToTraditionalInline_ex(const byte* input, word32* inOutIdx,
                                         word32 length, word32* algId);
WOLFSSL_LOCAL int ToTraditionalEnc(byte* buffer, word32 length,const char*,int,
                                   word32* algId);
WOLFSSL_ASN_API int UnTraditionalEnc(byte* key, word32 keySz, byte* out,
        word32* outSz, const char* password, int passwordSz, int vPKCS,
        int vAlgo, byte* salt, word32 saltSz, int itt, WC_RNG* rng, void* heap);
WOLFSSL_ASN_API int TraditionalEnc(byte* key, word32 keySz, byte* out,
        word32* outSz, const char* password, int passwordSz, int vPKCS,
        int vAlgo, int encAlgId, byte* salt, word32 saltSz, int itt,
        WC_RNG* rng, void* heap);
WOLFSSL_LOCAL int DecryptContent(byte* input, word32 sz,const char* psw,int pswSz);
WOLFSSL_LOCAL int EncryptContent(byte* input, word32 sz, byte* out, word32* outSz,
        const char* password,int passwordSz, int vPKCS, int vAlgo,
        byte* salt, word32 saltSz, int itt, WC_RNG* rng, void* heap);
WOLFSSL_LOCAL int wc_GetKeyOID(byte* key, word32 keySz, const byte** curveOID,
        word32* oidSz, int* algoID, void* heap);

typedef struct tm wolfssl_tm;
#if defined(OPENSSL_ALL) || defined(WOLFSSL_MYSQL_COMPATIBLE) || defined(OPENSSL_EXTRA) || \
    defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY)
WOLFSSL_LOCAL int GetTimeString(byte* date, int format, char* buf, int len);
#endif
#if !defined(NO_ASN_TIME) && defined(HAVE_PKCS7)
WOLFSSL_LOCAL int GetAsnTimeString(void* currTime, byte* buf, word32 len);
#endif
WOLFSSL_LOCAL int ExtractDate(const unsigned char* date, unsigned char format,
                                                 wolfssl_tm* certTime, int* idx);
WOLFSSL_LOCAL int DateGreaterThan(const struct tm* a, const struct tm* b);
WOLFSSL_LOCAL int wc_ValidateDate(const byte* date, byte format, int dateType);
WOLFSSL_LOCAL int wc_OBJ_sn2nid(const char *sn);

/* ASN.1 helper functions */
#ifdef WOLFSSL_CERT_GEN
WOLFSSL_ASN_API int SetName(byte* output, word32 outputSz, CertName* name);
WOLFSSL_LOCAL const char* GetOneCertName(CertName* name, int idx);
WOLFSSL_LOCAL byte GetCertNameId(int idx);
#endif
WOLFSSL_LOCAL int GetShortInt(const byte* input, word32* inOutIdx, int* number,
                              word32 maxIdx);
WOLFSSL_LOCAL int SetShortInt(byte* input, word32* inOutIdx, word32 number,
                              word32 maxIdx);

WOLFSSL_LOCAL const char* GetSigName(int oid);
WOLFSSL_LOCAL int GetLength(const byte* input, word32* inOutIdx, int* len,
                           word32 maxIdx);
WOLFSSL_LOCAL int GetLength_ex(const byte* input, word32* inOutIdx, int* len,
                           word32 maxIdx, int check);
WOLFSSL_LOCAL int GetSequence(const byte* input, word32* inOutIdx, int* len,
                             word32 maxIdx);
WOLFSSL_LOCAL int GetSequence_ex(const byte* input, word32* inOutIdx, int* len,
                           word32 maxIdx, int check);
WOLFSSL_LOCAL int GetOctetString(const byte* input, word32* inOutIdx, int* len,
                         word32 maxIdx);
WOLFSSL_LOCAL int CheckBitString(const byte* input, word32* inOutIdx, int* len,
                          word32 maxIdx, int zeroBits, byte* unusedBits);
WOLFSSL_LOCAL int GetSet(const byte* input, word32* inOutIdx, int* len,
                        word32 maxIdx);
WOLFSSL_LOCAL int GetSet_ex(const byte* input, word32* inOutIdx, int* len,
                        word32 maxIdx, int check);
WOLFSSL_LOCAL int GetMyVersion(const byte* input, word32* inOutIdx,
                              int* version, word32 maxIdx);
WOLFSSL_LOCAL int GetInt(mp_int* mpi, const byte* input, word32* inOutIdx,
                        word32 maxIdx);
#ifdef HAVE_OID_ENCODING
    WOLFSSL_LOCAL int EncodeObjectId(const word16* in, word32 inSz,
        byte* out, word32* outSz);
#endif
#ifdef HAVE_OID_DECODING
    WOLFSSL_LOCAL int DecodeObjectId(const byte* in, word32 inSz,
        word16* out, word32* outSz);
#endif
WOLFSSL_LOCAL int GetASNObjectId(const byte* input, word32* inOutIdx, int* len,
                                 word32 maxIdx);
WOLFSSL_LOCAL int SetObjectId(int len, byte* output);
WOLFSSL_LOCAL int GetObjectId(const byte* input, word32* inOutIdx, word32* oid,
                              word32 oidType, word32 maxIdx);
WOLFSSL_LOCAL int GetAlgoId(const byte* input, word32* inOutIdx, word32* oid,
                           word32 oidType, word32 maxIdx);
WOLFSSL_LOCAL int GetASNTag(const byte* input, word32* idx, byte* tag,
                            word32 inputSz);
WOLFSSL_LOCAL word32 SetLength(word32 length, byte* output);
WOLFSSL_LOCAL word32 SetSequence(word32 len, byte* output);
WOLFSSL_LOCAL word32 SetOctetString(word32 len, byte* output);
#if (defined(WOLFSSL_QT) || defined(OPENSSL_ALL)) && !defined(NO_DH) \
    || defined(WOLFSSL_OPENSSH)
WOLFSSL_LOCAL int wc_DhParamsToDer(DhKey* key, byte* out, word32* outSz);
WOLFSSL_LOCAL int wc_DhPubKeyToDer(DhKey* key, byte* out, word32* outSz);
WOLFSSL_LOCAL int wc_DhPrivKeyToDer(DhKey* key, byte* out, word32* outSz);
#endif
WOLFSSL_LOCAL int SetASNInt(int len, byte firstByte, byte* output);
WOLFSSL_LOCAL word32 SetBitString(word32 len, byte unusedBits, byte* output);
WOLFSSL_LOCAL word32 SetImplicit(byte tag,byte number,word32 len,byte* output);
WOLFSSL_LOCAL word32 SetExplicit(byte number, word32 len, byte* output);
WOLFSSL_LOCAL word32 SetSet(word32 len, byte* output);
WOLFSSL_LOCAL word32 SetAlgoID(int algoOID,byte* output,int type,int curveSz);
WOLFSSL_LOCAL int SetMyVersion(word32 version, byte* output, int header);
WOLFSSL_LOCAL int SetSerialNumber(const byte* sn, word32 snSz, byte* output,
    word32 outputSz, int maxSnSz);
WOLFSSL_LOCAL int GetSerialNumber(const byte* input, word32* inOutIdx,
    byte* serial, int* serialSz, word32 maxIdx);
WOLFSSL_LOCAL int GetNameHash(const byte* source, word32* idx, byte* hash,
                             int maxIdx);
WOLFSSL_LOCAL int wc_CheckPrivateKeyCert(const byte* key, word32 keySz, DecodedCert* der);
WOLFSSL_LOCAL int wc_CheckPrivateKey(const byte* privKey, word32 privKeySz,
                                     const byte* pubKey, word32 pubKeySz, enum Key_Sum ks);
WOLFSSL_LOCAL int StoreDHparams(byte* out, word32* outLen, mp_int* p, mp_int* g);
WOLFSSL_LOCAL int FlattenAltNames( byte*, word32, const DNS_entry*);

#ifdef HAVE_ECC
    /* ASN sig helpers */
    WOLFSSL_LOCAL int StoreECC_DSA_Sig(byte* out, word32* outLen, mp_int* r,
                                      mp_int* s);
    WOLFSSL_LOCAL int StoreECC_DSA_Sig_Bin(byte* out, word32* outLen, 
        const byte* r, word32 rLen, const byte* s, word32 sLen);
    WOLFSSL_LOCAL int DecodeECC_DSA_Sig_Bin(const byte* sig, word32 sigLen, 
        byte* r, word32* rLen, byte* s, word32* sLen);
#endif
#if defined(HAVE_ECC) || !defined(NO_DSA)
    WOLFSSL_LOCAL int DecodeECC_DSA_Sig(const byte* sig, word32 sigLen,
                                       mp_int* r, mp_int* s);
#endif
#if defined HAVE_ECC && (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
WOLFSSL_API int EccEnumToNID(int n);
#endif

WOLFSSL_LOCAL void InitSignatureCtx(SignatureCtx* sigCtx, void* heap, int devId);
WOLFSSL_LOCAL void FreeSignatureCtx(SignatureCtx* sigCtx);

#ifndef NO_CERTS

WOLFSSL_LOCAL int wc_EncryptedInfoParse(EncryptedInfo* info, char** pBuffer,
                                        size_t bufSz);

WOLFSSL_LOCAL int PemToDer(const unsigned char* buff, long sz, int type,
                          DerBuffer** pDer, void* heap, EncryptedInfo* info,
                          int* eccKey);
WOLFSSL_LOCAL int AllocDer(DerBuffer** der, word32 length, int type, void* heap);
WOLFSSL_LOCAL void FreeDer(DerBuffer** der);

#endif /* !NO_CERTS */

#ifdef HAVE_SMIME
WOLFSSL_LOCAL int wc_MIME_parse_headers(char* in, int inLen, MimeHdr** hdrs);
WOLFSSL_LOCAL int wc_MIME_header_strip(char* in, char** out, size_t start, size_t end);
WOLFSSL_LOCAL int wc_MIME_create_header(char* name, char* body, MimeHdr** hdr);
WOLFSSL_LOCAL int wc_MIME_create_parameter(char* attribute, char* value, MimeParam** param);
WOLFSSL_LOCAL MimeHdr* wc_MIME_find_header_name(const char* name, MimeHdr* hdr);
WOLFSSL_LOCAL MimeParam* wc_MIME_find_param_attr(const char* attribute, MimeParam* param);
WOLFSSL_LOCAL int wc_MIME_free_hdrs(MimeHdr* head);
#endif /* HAVE_SMIME */

#ifdef WOLFSSL_CERT_GEN

enum cert_enums {
#ifdef WOLFSSL_CERT_EXT
    NAME_ENTRIES    =  10,
#else
    NAME_ENTRIES    =  9,
#endif
    JOINT_LEN       =  2,
    EMAIL_JOINT_LEN =  9,
    PILOT_JOINT_LEN =  10,
    RSA_KEY         = 10,
    NTRU_KEY        = 11,
    ECC_KEY         = 12,
    ED25519_KEY     = 13,
    ED448_KEY       = 14,
    DSA_KEY         = 15
};

#endif /* WOLFSSL_CERT_GEN */



/* for pointer use */
typedef struct CertStatus CertStatus;

#ifdef HAVE_OCSP

enum Ocsp_Response_Status {
    OCSP_SUCCESSFUL        = 0, /* Response has valid confirmations */
    OCSP_MALFORMED_REQUEST = 1, /* Illegal confirmation request */
    OCSP_INTERNAL_ERROR    = 2, /* Internal error in issuer */
    OCSP_TRY_LATER         = 3, /* Try again later */
    OCSP_SIG_REQUIRED      = 5, /* Must sign the request (4 is skipped) */
    OCSP_UNAUTHROIZED      = 6  /* Request unauthorized */
};


enum Ocsp_Cert_Status {
    CERT_GOOD    = 0,
    CERT_REVOKED = 1,
    CERT_UNKNOWN = 2
};


enum Ocsp_Sums {
    OCSP_BASIC_OID = 117,
    OCSP_NONCE_OID = 118
};

#ifdef OPENSSL_EXTRA
enum Ocsp_Verify_Error {
    OCSP_VERIFY_ERROR_NONE = 0,
    OCSP_BAD_ISSUER = 1
};
#endif


typedef struct OcspRequest  OcspRequest;
typedef struct OcspResponse OcspResponse;


struct CertStatus {
    CertStatus* next;

    byte serial[EXTERNAL_SERIAL_SIZE];
    int serialSz;
#ifdef OPENSSL_EXTRA
    WOLFSSL_ASN1_INTEGER* serialInt;
#endif

    int status;

    byte thisDate[MAX_DATE_SIZE];
    byte nextDate[MAX_DATE_SIZE];
    byte thisDateFormat;
    byte nextDateFormat;
#if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY) || defined(HAVE_LIGHTY)
    WOLFSSL_ASN1_TIME thisDateParsed;
    WOLFSSL_ASN1_TIME nextDateParsed;
    byte* thisDateAsn;
    byte* nextDateAsn;
#endif

    byte*  rawOcspResponse;
    word32 rawOcspResponseSz;
};

typedef struct OcspEntry OcspEntry;

#ifdef NO_SHA
#define OCSP_DIGEST_SIZE WC_SHA256_DIGEST_SIZE
#else
#define OCSP_DIGEST_SIZE WC_SHA_DIGEST_SIZE
#endif

struct OcspEntry
{
    OcspEntry *next;                      /* next entry                */
    word32 hashAlgoOID;                   /* hash algo ID              */
    byte issuerHash[OCSP_DIGEST_SIZE];    /* issuer hash               */
    byte issuerKeyHash[OCSP_DIGEST_SIZE]; /* issuer public key hash    */
    CertStatus *status;                   /* OCSP response list        */
    int totalStatus;                      /* number on list            */
    byte* rawCertId;                      /* raw bytes of the CertID   */
    int rawCertIdSize;                    /* num bytes in raw CertID   */
    /* option bits - using 32-bit for alignment */
    word32 isDynamic:1;                   /* was dynamically allocated */

};

/* TODO: Long-term, it would be helpful if we made this struct and other OCSP
         structs conform to the ASN spec as described in RFC 6960. It will help
         with readability and with implementing OpenSSL compatibility API
         functions, because OpenSSL's OCSP data structures conform to the
         RFC. */
struct OcspResponse {
    int     responseStatus;  /* return code from Responder */

    byte*   response;        /* Pointer to beginning of OCSP Response */
    word32  responseSz;      /* length of the OCSP Response */

    byte    producedDate[MAX_DATE_SIZE];
                             /* Date at which this response was signed */
    byte    producedDateFormat; /* format of the producedDate */

    byte*   cert;
    word32  certSz;

    byte*   sig;             /* Pointer to sig in source */
    word32  sigSz;           /* Length in octets for the sig */
    word32  sigOID;          /* OID for hash used for sig */

    OcspEntry* single;       /* chain of OCSP single responses */

    byte*   nonce;           /* pointer to nonce inside ASN.1 response */
    int     nonceSz;         /* length of the nonce string */

    byte*   source;          /* pointer to source buffer, not owned */
    word32  maxIdx;          /* max offset based on init size */

#ifdef OPENSSL_EXTRA
    int     verifyError;
#endif
    void*  heap;
};


struct OcspRequest {
    byte   issuerHash[KEYID_SIZE];
    byte   issuerKeyHash[KEYID_SIZE];
    byte*  serial;   /* copy of the serial number in source cert */
    int    serialSz;
#ifdef OPENSSL_EXTRA
    WOLFSSL_ASN1_INTEGER* serialInt;
#endif
    byte*  url;      /* copy of the extAuthInfo in source cert */
    int    urlSz;

    byte   nonce[MAX_OCSP_NONCE_SZ];
    int    nonceSz;
    void*  heap;
    void*  ssl;
};

WOLFSSL_LOCAL void InitOcspResponse(OcspResponse*, OcspEntry*, CertStatus*, byte*, word32, void*);
WOLFSSL_LOCAL void FreeOcspResponse(OcspResponse*);
WOLFSSL_LOCAL int OcspResponseDecode(OcspResponse*, void*, void* heap, int);

WOLFSSL_LOCAL int    InitOcspRequest(OcspRequest*, DecodedCert*, byte, void*);
WOLFSSL_LOCAL void   FreeOcspRequest(OcspRequest*);
WOLFSSL_LOCAL int    EncodeOcspRequest(OcspRequest*, byte*, word32);
WOLFSSL_LOCAL word32 EncodeOcspRequestExtensions(OcspRequest*, byte*, word32);


WOLFSSL_LOCAL int  CompareOcspReqResp(OcspRequest*, OcspResponse*);


#endif /* HAVE_OCSP */


/* for pointer use */
typedef struct RevokedCert RevokedCert;

#ifdef HAVE_CRL

struct RevokedCert {
    byte         serialNumber[EXTERNAL_SERIAL_SIZE];
    int          serialSz;
    RevokedCert* next;
};

typedef struct DecodedCRL DecodedCRL;

struct DecodedCRL {
    word32  certBegin;               /* offset to start of cert          */
    word32  sigIndex;                /* offset to start of signature     */
    word32  sigLength;               /* length of signature              */
    word32  signatureOID;            /* sum of algorithm object id       */
    byte*   signature;               /* pointer into raw source, not owned */
    byte    issuerHash[SIGNER_DIGEST_SIZE]; /* issuer name hash          */
    byte    crlHash[SIGNER_DIGEST_SIZE]; /* raw crl data hash            */
    byte    lastDate[MAX_DATE_SIZE]; /* last date updated  */
    byte    nextDate[MAX_DATE_SIZE]; /* next update date   */
    byte    lastDateFormat;          /* format of last date */
    byte    nextDateFormat;          /* format of next date */
    RevokedCert* certs;              /* revoked cert list  */
    int          totalCerts;         /* number on list     */
    void*   heap;
#ifndef NO_SKID
    byte    extAuthKeyIdSet;
    byte    extAuthKeyId[SIGNER_DIGEST_SIZE]; /* Authority Key ID        */
#endif
};

WOLFSSL_LOCAL void InitDecodedCRL(DecodedCRL*, void* heap);
WOLFSSL_LOCAL int VerifyCRL_Signature(SignatureCtx* sigCtx,
                                      const byte* toBeSigned, word32 tbsSz,
                                      const byte* signature, word32 sigSz,
                                      word32 signatureOID, Signer *ca,
                                      void* heap);
WOLFSSL_LOCAL int  ParseCRL(DecodedCRL*, const byte* buff, word32 sz, void* cm);
WOLFSSL_LOCAL void FreeDecodedCRL(DecodedCRL*);


#endif /* HAVE_CRL */


#ifdef __cplusplus
    } /* extern "C" */
#endif

#endif /* !NO_ASN */


#if !defined(NO_ASN) || !defined(NO_PWDBASED)

#ifndef MAX_KEY_SIZE
    #define MAX_KEY_SIZE    64  /* MAX PKCS Key length */
#endif
#ifndef MAX_UNICODE_SZ
    #define MAX_UNICODE_SZ  256
#endif

enum PBESTypes {
    PBE_MD5_DES        = 0,
    PBE_SHA1_RC4_128   = 1,
    PBE_SHA1_DES       = 2,
    PBE_SHA1_DES3      = 3,
    PBE_AES256_CBC     = 4,
    PBE_AES128_CBC     = 5,
    PBE_SHA1_40RC2_CBC = 6,

    PBE_SHA1_RC4_128_SUM = 657,
    PBE_SHA1_DES3_SUM    = 659,
    PBES2            = 13       /* algo ID */
};

enum PKCSTypes {
    PKCS5v2             =   6,     /* PKCS #5 v2.0 */
    PKCS12v1            =  12,     /* PKCS #12 */
    PKCS5               =   5,     /* PKCS oid tag */
    PKCS8v0             =   0,     /* default PKCS#8 version */
};

#endif /* !NO_ASN || !NO_PWDBASED */

#endif /* WOLF_CRYPT_ASN_H */
