/*
 * Copyright 2007-2024 The OpenSSL Project Authors. All Rights Reserved.
 * Copyright Nokia 2007-2019
 * Copyright Siemens AG 2015-2019
 *
 * 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_CMP_LOCAL_H
# define OSSL_CRYPTO_CMP_LOCAL_H

# include "internal/cryptlib.h"

# include <openssl/cmp.h>
# include <openssl/err.h>

/* explicit #includes not strictly needed since implied by the above: */
# include <openssl/crmf.h>
# include <openssl/types.h>
# include <openssl/safestack.h>
# include <openssl/x509.h>
# include <openssl/x509v3.h>
# include "crypto/x509.h"

# define IS_NULL_DN(name) (X509_NAME_get_entry(name, 0) == NULL)

/*
 * this structure is used to store the context for CMP sessions
 */
struct ossl_cmp_ctx_st {
    OSSL_LIB_CTX *libctx;
    char *propq;
    OSSL_CMP_log_cb_t log_cb; /* log callback for error/debug/etc. output */
    OSSL_CMP_severity log_verbosity; /* level of verbosity of log output */

    /* message transfer */
    OSSL_CMP_transfer_cb_t transfer_cb; /* default: OSSL_CMP_MSG_http_perform */
    void *transfer_cb_arg; /* allows to store optional argument to cb */
    /* HTTP-based transfer */
    OSSL_HTTP_REQ_CTX *http_ctx;
    char *serverPath;
    char *server;
    int serverPort;
    char *proxy;
    char *no_proxy;
    int keep_alive; /* persistent connection: 0=no, 1=prefer, 2=require */
    int msg_timeout; /* max seconds to wait for each CMP message round trip */
    int total_timeout; /* max number of seconds an enrollment may take, incl. */
    int tls_used; /* whether to use TLS for client-side HTTP connections */
    /* attempts polling for a response if a 'waiting' PKIStatus is received */
    time_t end_time; /* session start time + totaltimeout */
# ifndef OPENSSL_NO_HTTP
    OSSL_HTTP_bio_cb_t http_cb;
    void *http_cb_arg; /* allows to store optional argument to cb */
# endif

    /* server authentication */
    /*
     * unprotectedErrors may be set as workaround for broken server responses:
     * accept missing or invalid protection of regular error messages, negative
     * certificate responses (ip/cp/kup), revocation responses (rp), and PKIConf
     */
    int unprotectedErrors;
    int noCacheExtraCerts;
    X509 *srvCert; /* certificate used to identify the server */
    X509 *validatedSrvCert; /* caches any already validated server cert */
    X509_NAME *expected_sender; /* expected sender in header of response */
    X509_STORE *trusted; /* trust store maybe w CRLs and cert verify callback */
    STACK_OF(X509) *untrusted; /* untrusted (intermediate CA) certs */
    int ignore_keyusage; /* ignore key usage entry when validating certs */
    /*
     * permitTAInExtraCertsForIR allows use of root certs in extracerts
     * when validating message protection; this is used for 3GPP-style E.7
     */
    int permitTAInExtraCertsForIR;

    /* client authentication */
    int unprotectedSend; /* send unprotected PKI messages */
    X509 *cert; /* protection cert used to identify and sign for MSG_SIG_ALG */
    STACK_OF(X509) *chain; /* (cached) chain of protection cert including it */
    EVP_PKEY *pkey; /* the key pair corresponding to cert */
    ASN1_OCTET_STRING *referenceValue; /* optional username for MSG_MAC_ALG */
    ASN1_OCTET_STRING *secretValue; /* password/shared secret for MSG_MAC_ALG */
    /* PBMParameters for MSG_MAC_ALG */
    size_t pbm_slen; /* salt length, currently fixed to 16 */
    EVP_MD *pbm_owf; /* one-way function (OWF), default: SHA256 */
    int pbm_itercnt; /* OWF iteration count, currently fixed to 500 */
    int pbm_mac; /* NID of MAC algorithm, default: HMAC-SHA1 as per RFC 4210 */

    /* CMP message header and extra certificates */
    X509_NAME *recipient; /* to set in recipient in pkiheader */
    EVP_MD *digest; /* digest used in MSG_SIG_ALG and POPO, default SHA256 */
    ASN1_OCTET_STRING *transactionID; /* the current transaction ID */
    ASN1_OCTET_STRING *senderNonce; /* last nonce sent */
    ASN1_OCTET_STRING *recipNonce; /* last nonce received */
    ASN1_OCTET_STRING *first_senderNonce; /* sender nonce when starting to poll */
    ASN1_UTF8STRING *freeText; /* optional string to include each msg */
    STACK_OF(OSSL_CMP_ITAV) *geninfo_ITAVs;
    int implicitConfirm; /* set implicitConfirm in IR/KUR/CR messages */
    int disableConfirm; /* disable certConf in IR/KUR/CR for broken servers */
    STACK_OF(X509) *extraCertsOut; /* to be included in request messages */

    /* certificate template */
    EVP_PKEY *newPkey; /* explicit new private/public key for cert enrollment */
    int newPkey_priv; /* flag indicating if newPkey contains private key */
    X509_NAME *issuer; /* issuer name to used in cert template, also in rr */
    ASN1_INTEGER *serialNumber; /* certificate serial number to use in rr */
    int days; /* Number of days new certificates are asked to be valid for */
    X509_NAME *subjectName; /* subject name to be used in cert template */
    STACK_OF(GENERAL_NAME) *subjectAltNames; /* to add to the cert template */
    int SubjectAltName_nodefault;
    int setSubjectAltNameCritical;
    X509_EXTENSIONS *reqExtensions; /* exts to be added to cert template */
    CERTIFICATEPOLICIES *policies; /* policies to be included in extensions */
    int setPoliciesCritical;
    int popoMethod; /* Proof-of-possession mechanism; default: signature */
    X509 *oldCert; /* cert to be updated (via KUR) or to be revoked (via RR) */
    X509_REQ *p10CSR; /* for P10CR: PKCS#10 CSR to be sent */

    /* misc body contents */
    int revocationReason; /* revocation reason code to be included in RR */
    STACK_OF(OSSL_CMP_ITAV) *genm_ITAVs; /* content of general message */

    /* result returned in responses, so far supporting only one certResponse */
    int status; /* PKIStatus of last received IP/CP/KUP/RP/error or -1 */
    OSSL_CMP_PKIFREETEXT *statusString; /* of last IP/CP/KUP/RP/error */
    int failInfoCode; /* failInfoCode of last received IP/CP/KUP/error, or -1 */
    X509 *newCert; /* newly enrolled cert received from the CA */
    STACK_OF(X509) *newChain; /* chain of newly enrolled cert received */
    STACK_OF(X509) *caPubs; /* CA certs received from server (in IP message) */
    STACK_OF(X509) *extraCertsIn; /* extraCerts received from server */

    /* certificate confirmation */
    OSSL_CMP_certConf_cb_t certConf_cb; /* callback for app checking new cert */
    void *certConf_cb_arg; /* allows to store an argument individual to cb */
} /* OSSL_CMP_CTX */;

/*
 * ##########################################################################
 * ASN.1 DECLARATIONS
 * ##########################################################################
 */

/*-
 *   RevAnnContent ::= SEQUENCE {
 *       status              PKIStatus,
 *       certId              CertId,
 *       willBeRevokedAt     GeneralizedTime,
 *       badSinceDate        GeneralizedTime,
 *       crlDetails          Extensions  OPTIONAL
 *       -- extra CRL details (e.g., crl number, reason, location, etc.)
 *   }
 */
typedef struct ossl_cmp_revanncontent_st {
    ASN1_INTEGER *status;
    OSSL_CRMF_CERTID *certId;
    ASN1_GENERALIZEDTIME *willBeRevokedAt;
    ASN1_GENERALIZEDTIME *badSinceDate;
    X509_EXTENSIONS *crlDetails;
} OSSL_CMP_REVANNCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_REVANNCONTENT)

/*-
 *   Challenge ::= SEQUENCE {
 *       owf                 AlgorithmIdentifier  OPTIONAL,
 *
 *       -- MUST be present in the first Challenge; MAY be omitted in
 *       -- any subsequent Challenge in POPODecKeyChallContent (if
 *       -- omitted, then the owf used in the immediately preceding
 *       -- Challenge is to be used).
 *
 *       witness             OCTET STRING,
 *       -- the result of applying the one-way function (owf) to a
 *       -- randomly-generated INTEGER, A.  [Note that a different
 *       -- INTEGER MUST be used for each Challenge.]
 *       challenge           OCTET STRING
 *       -- the encryption (under the public key for which the cert.
 *       -- request is being made) of Rand, where Rand is specified as
 *       --   Rand ::= SEQUENCE {
 *       --      int      INTEGER,
 *       --       - the randomly-generated INTEGER A (above)
 *       --      sender   GeneralName
 *       --       - the sender's name (as included in PKIHeader)
 *       --   }
 *   }
 */
typedef struct ossl_cmp_challenge_st {
    X509_ALGOR *owf;
    ASN1_OCTET_STRING *witness;
    ASN1_OCTET_STRING *challenge;
} OSSL_CMP_CHALLENGE;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CHALLENGE)

/*-
 *  CAKeyUpdAnnContent ::= SEQUENCE {
 *     oldWithNew         Certificate,
 *     newWithOld         Certificate,
 *     newWithNew         Certificate
 *  }
 */
typedef struct ossl_cmp_cakeyupdanncontent_st {
    X509 *oldWithNew;
    X509 *newWithOld;
    X509 *newWithNew;
} OSSL_CMP_CAKEYUPDANNCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CAKEYUPDANNCONTENT)

typedef struct ossl_cmp_rootcakeyupdate_st OSSL_CMP_ROOTCAKEYUPDATE;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_ROOTCAKEYUPDATE)

typedef struct ossl_cmp_certreqtemplate_st OSSL_CMP_CERTREQTEMPLATE;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CERTREQTEMPLATE)

/*-
 * CRLSource ::= CHOICE {
 *      dpn          [0] DistributionPointName,
 *      issuer       [1] GeneralNames }
 */

typedef struct ossl_cmp_crlsource_st {
    int type;
    union {
        DIST_POINT_NAME *dpn;
        GENERAL_NAMES *issuer;
    } value;
} OSSL_CMP_CRLSOURCE;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CRLSOURCE)

/*
 * CRLStatus ::= SEQUENCE {
 *      source       CRLSource,
 *      thisUpdate   Time OPTIONAL }
 */

struct ossl_cmp_crlstatus_st {
    OSSL_CMP_CRLSOURCE *source;
    ASN1_TIME *thisUpdate;
}; /* OSSL_CMP_CRLSTATUS */
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CRLSTATUS)

/*-
 * declared already here as it will be used in OSSL_CMP_MSG (nested) and
 * infoType and infoValue
 */
typedef STACK_OF(OSSL_CMP_MSG) OSSL_CMP_MSGS;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_MSGS)

/*-
 *   InfoTypeAndValue ::= SEQUENCE {
 *       infoType               OBJECT IDENTIFIER,
 *       infoValue              ANY DEFINED BY infoType  OPTIONAL
 *   }
 */
struct ossl_cmp_itav_st {
    ASN1_OBJECT *infoType;
    union {
        char *ptr;
        /* NID_id_it_caProtEncCert - CA Protocol Encryption Certificate */
        X509 *caProtEncCert;
        /* NID_id_it_signKeyPairTypes - Signing Key Pair Types */
        STACK_OF(X509_ALGOR) *signKeyPairTypes;
        /* NID_id_it_encKeyPairTypes - Encryption/Key Agreement Key Pair Types */
        STACK_OF(X509_ALGOR) *encKeyPairTypes;
        /* NID_id_it_preferredSymmAlg - Preferred Symmetric Algorithm */
        X509_ALGOR *preferredSymmAlg;
        /* NID_id_it_caKeyUpdateInfo - Updated CA Key Pair */
        OSSL_CMP_CAKEYUPDANNCONTENT *caKeyUpdateInfo;
        /* NID_id_it_currentCRL - CRL */
        X509_CRL *currentCRL;
        /* NID_id_it_unsupportedOIDs - Unsupported Object Identifiers */
        STACK_OF(ASN1_OBJECT) *unsupportedOIDs;
        /* NID_id_it_keyPairParamReq - Key Pair Parameters Request */
        ASN1_OBJECT *keyPairParamReq;
        /* NID_id_it_keyPairParamRep - Key Pair Parameters Response */
        X509_ALGOR *keyPairParamRep;
        /* NID_id_it_revPassphrase - Revocation Passphrase */
        OSSL_CRMF_ENCRYPTEDVALUE *revPassphrase;
        /* NID_id_it_implicitConfirm - ImplicitConfirm */
        ASN1_NULL *implicitConfirm;
        /* NID_id_it_confirmWaitTime - ConfirmWaitTime */
        ASN1_GENERALIZEDTIME *confirmWaitTime;
        /* NID_id_it_origPKIMessage - origPKIMessage */
        OSSL_CMP_MSGS *origPKIMessage;
        /* NID_id_it_suppLangTags - Supported Language Tags */
        STACK_OF(ASN1_UTF8STRING) *suppLangTagsValue;
        /* NID_id_it_certProfile - Certificate Profile */
        STACK_OF(ASN1_UTF8STRING) *certProfile;
        /* NID_id_it_caCerts - CA Certificates */
        STACK_OF(X509) *caCerts;
        /* NID_id_it_rootCaCert - Root CA Certificate */
        X509 *rootCaCert;
        /* NID_id_it_rootCaKeyUpdate - Root CA Certificate Update */
        OSSL_CMP_ROOTCAKEYUPDATE *rootCaKeyUpdate;
        /* NID_id_it_certReqTemplate - Certificate Request Template */
        OSSL_CMP_CERTREQTEMPLATE *certReqTemplate;
        /* NID_id_it_crlStatusList -  CRL Update Retrieval */
        STACK_OF(OSSL_CMP_CRLSTATUS) *crlStatusList;
        /* NID_id_it_crls - Certificate Status Lists */
        STACK_OF(X509_CRL) *crls;

        /* this is to be used for so far undeclared objects */
        ASN1_TYPE *other;
    } infoValue;
} /* OSSL_CMP_ITAV */;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_ITAV)

typedef struct ossl_cmp_certorenccert_st {
    int type;
    union {
        X509 *certificate;
        OSSL_CRMF_ENCRYPTEDVALUE *encryptedCert;
    } value;
} OSSL_CMP_CERTORENCCERT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CERTORENCCERT)

/*-
 *   CertifiedKeyPair ::= SEQUENCE {
 *       certOrEncCert       CertOrEncCert,
 *       privateKey      [0] EncryptedValue      OPTIONAL,
 *       -- see [CRMF] for comment on encoding
 *       publicationInfo [1] PKIPublicationInfo  OPTIONAL
 *   }
 */
typedef struct ossl_cmp_certifiedkeypair_st {
    OSSL_CMP_CERTORENCCERT *certOrEncCert;
    OSSL_CRMF_ENCRYPTEDVALUE *privateKey;
    OSSL_CRMF_PKIPUBLICATIONINFO *publicationInfo;
} OSSL_CMP_CERTIFIEDKEYPAIR;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CERTIFIEDKEYPAIR)

/*-
 *   PKIStatusInfo ::= SEQUENCE {
 *       status        PKIStatus,
 *       statusString  PKIFreeText     OPTIONAL,
 *       failInfo      PKIFailureInfo  OPTIONAL
 *   }
 */
struct ossl_cmp_pkisi_st {
    OSSL_CMP_PKISTATUS *status;
    OSSL_CMP_PKIFREETEXT *statusString;
    OSSL_CMP_PKIFAILUREINFO *failInfo;
} /* OSSL_CMP_PKISI */;

/*-
 *  RevReqContent ::= SEQUENCE OF RevDetails
 *
 *  RevDetails ::= SEQUENCE {
 *      certDetails         CertTemplate,
 *      crlEntryDetails     Extensions       OPTIONAL
 *  }
 */
struct ossl_cmp_revdetails_st {
    OSSL_CRMF_CERTTEMPLATE *certDetails;
    X509_EXTENSIONS *crlEntryDetails;
} /* OSSL_CMP_REVDETAILS */;
typedef struct ossl_cmp_revdetails_st OSSL_CMP_REVDETAILS;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_REVDETAILS)
DEFINE_STACK_OF(OSSL_CMP_REVDETAILS)

/*-
 *   RevRepContent ::= SEQUENCE {
 *       status       SEQUENCE SIZE (1..MAX) OF PKIStatusInfo,
 *       -- in same order as was sent in RevReqContent
 *       revCerts [0] SEQUENCE SIZE (1..MAX) OF CertId
 *                                           OPTIONAL,
 *       -- IDs for which revocation was requested
 *       -- (same order as status)
 *       crls     [1] SEQUENCE SIZE (1..MAX) OF CertificateList
 *                                           OPTIONAL
 *       -- the resulting CRLs (there may be more than one)
 *   }
 */
struct ossl_cmp_revrepcontent_st {
    STACK_OF(OSSL_CMP_PKISI) *status;
    STACK_OF(OSSL_CRMF_CERTID) *revCerts;
    STACK_OF(X509_CRL) *crls;
} /* OSSL_CMP_REVREPCONTENT */;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_REVREPCONTENT)

/*-
 *  KeyRecRepContent ::= SEQUENCE {
 *      status          PKIStatusInfo,
 *      newSigCert  [0] Certificate                   OPTIONAL,
 *      caCerts     [1] SEQUENCE SIZE (1..MAX) OF
 *                                   Certificate      OPTIONAL,
 *      keyPairHist [2] SEQUENCE SIZE (1..MAX) OF
 *                                   CertifiedKeyPair OPTIONAL
 *   }
 */
typedef struct ossl_cmp_keyrecrepcontent_st {
    OSSL_CMP_PKISI *status;
    X509 *newSigCert;
    STACK_OF(X509) *caCerts;
    STACK_OF(OSSL_CMP_CERTIFIEDKEYPAIR) *keyPairHist;
} OSSL_CMP_KEYRECREPCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_KEYRECREPCONTENT)

/*-
 *   ErrorMsgContent ::= SEQUENCE {
 *       pKIStatusInfo          PKIStatusInfo,
 *       errorCode              INTEGER           OPTIONAL,
 *       -- implementation-specific error codes
 *       errorDetails           PKIFreeText       OPTIONAL
 *       -- implementation-specific error details
 *   }
 */
typedef struct ossl_cmp_errormsgcontent_st {
    OSSL_CMP_PKISI *pKIStatusInfo;
    ASN1_INTEGER *errorCode;
    OSSL_CMP_PKIFREETEXT *errorDetails;
} OSSL_CMP_ERRORMSGCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_ERRORMSGCONTENT)

/*-
 *   CertConfirmContent ::= SEQUENCE OF CertStatus
 *
 *   CertStatus ::= SEQUENCE {
 *      certHash    OCTET STRING,
 *      -- the hash of the certificate, using the same hash algorithm
 *      -- as is used to create and verify the certificate signature
 *      certReqId   INTEGER,
 *      -- to match this confirmation with the corresponding req/rep
 *      statusInfo  PKIStatusInfo OPTIONAL,
 *      hashAlg [0] AlgorithmIdentifier OPTIONAL
 *   }
 */
struct ossl_cmp_certstatus_st {
    ASN1_OCTET_STRING *certHash;
    ASN1_INTEGER *certReqId;
    OSSL_CMP_PKISI *statusInfo;
    X509_ALGOR *hashAlg; /* 0 */
} /* OSSL_CMP_CERTSTATUS */;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CERTSTATUS)
typedef STACK_OF(OSSL_CMP_CERTSTATUS) OSSL_CMP_CERTCONFIRMCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CERTCONFIRMCONTENT)

/*-
 *   CertResponse ::= SEQUENCE {
 *       certReqId           INTEGER,
 *       -- to match this response with corresponding request (a value
 *       -- of -1 is to be used if certReqId is not specified in the
 *       -- corresponding request)
 *       status              PKIStatusInfo,
 *       certifiedKeyPair    CertifiedKeyPair    OPTIONAL,
 *       rspInfo             OCTET STRING        OPTIONAL
 *       -- analogous to the id-regInfo-utf8Pairs string defined
 *       -- for regInfo in CertReqMsg [CRMF]
 *   }
 */
struct ossl_cmp_certresponse_st {
    ASN1_INTEGER *certReqId;
    OSSL_CMP_PKISI *status;
    OSSL_CMP_CERTIFIEDKEYPAIR *certifiedKeyPair;
    ASN1_OCTET_STRING *rspInfo;
} /* OSSL_CMP_CERTRESPONSE */;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CERTRESPONSE)

/*-
 *   CertRepMessage ::= SEQUENCE {
 *       caPubs       [1] SEQUENCE SIZE (1..MAX) OF CMPCertificate
 *                        OPTIONAL,
 *       response         SEQUENCE OF CertResponse
 *   }
 */
struct ossl_cmp_certrepmessage_st {
    STACK_OF(X509) *caPubs;
    STACK_OF(OSSL_CMP_CERTRESPONSE) *response;
} /* OSSL_CMP_CERTREPMESSAGE */;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CERTREPMESSAGE)

/*-
 *   PollReqContent ::= SEQUENCE OF SEQUENCE {
 *         certReqId                              INTEGER
 *   }
 */
typedef struct ossl_cmp_pollreq_st {
    ASN1_INTEGER *certReqId;
} OSSL_CMP_POLLREQ;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_POLLREQ)
DEFINE_STACK_OF(OSSL_CMP_POLLREQ)
typedef STACK_OF(OSSL_CMP_POLLREQ) OSSL_CMP_POLLREQCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_POLLREQCONTENT)

/*-
 * PollRepContent ::= SEQUENCE OF SEQUENCE {
 *         certReqId                              INTEGER,
 *         checkAfter                             INTEGER,  -- time in seconds
 *         reason                                 PKIFreeText OPTIONAL
 * }
 */
struct ossl_cmp_pollrep_st {
    ASN1_INTEGER *certReqId;
    ASN1_INTEGER *checkAfter;
    OSSL_CMP_PKIFREETEXT *reason;
} /* OSSL_CMP_POLLREP */;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_POLLREP)
DEFINE_STACK_OF(OSSL_CMP_POLLREP)
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_POLLREPCONTENT)

/*-
 * PKIHeader ::= SEQUENCE {
 *     pvno                INTEGER     { cmp1999(1), cmp2000(2), cmp2021(3) },
 *     sender              GeneralName,
 *     -- identifies the sender
 *     recipient           GeneralName,
 *     -- identifies the intended recipient
 *     messageTime     [0] GeneralizedTime         OPTIONAL,
 *     -- time of production of this message (used when sender
 *     -- believes that the transport will be "suitable"; i.e.,
 *     -- that the time will still be meaningful upon receipt)
 *     protectionAlg   [1] AlgorithmIdentifier     OPTIONAL,
 *     -- algorithm used for calculation of protection bits
 *     senderKID       [2] KeyIdentifier           OPTIONAL,
 *     recipKID        [3] KeyIdentifier           OPTIONAL,
 *     -- to identify specific keys used for protection
 *     transactionID   [4] OCTET STRING            OPTIONAL,
 *     -- identifies the transaction; i.e., this will be the same in
 *     -- corresponding request, response, certConf, and PKIConf
 *     -- messages
 *     senderNonce     [5] OCTET STRING            OPTIONAL,
 *     recipNonce      [6] OCTET STRING            OPTIONAL,
 *     -- nonces used to provide replay protection, senderNonce
 *     -- is inserted by the creator of this message; recipNonce
 *     -- is a nonce previously inserted in a related message by
 *     -- the intended recipient of this message
 *     freeText        [7] PKIFreeText             OPTIONAL,
 *     -- this may be used to indicate context-specific instructions
 *     -- (this field is intended for human consumption)
 *     generalInfo     [8] SEQUENCE SIZE (1..MAX) OF
 *                            InfoTypeAndValue     OPTIONAL
 *     -- this may be used to convey context-specific information
 *     -- (this field not primarily intended for human consumption)
 *   }
 */
struct ossl_cmp_pkiheader_st {
    ASN1_INTEGER *pvno;
    GENERAL_NAME *sender;
    GENERAL_NAME *recipient;
    ASN1_GENERALIZEDTIME *messageTime; /* 0 */
    X509_ALGOR *protectionAlg; /* 1 */
    ASN1_OCTET_STRING *senderKID; /* 2 */
    ASN1_OCTET_STRING *recipKID; /* 3 */
    ASN1_OCTET_STRING *transactionID; /* 4 */
    ASN1_OCTET_STRING *senderNonce; /* 5 */
    ASN1_OCTET_STRING *recipNonce; /* 6 */
    OSSL_CMP_PKIFREETEXT *freeText; /* 7 */
    STACK_OF(OSSL_CMP_ITAV) *generalInfo; /* 8 */
} /* OSSL_CMP_PKIHEADER */;

typedef STACK_OF(OSSL_CMP_CHALLENGE) OSSL_CMP_POPODECKEYCHALLCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_POPODECKEYCHALLCONTENT)
typedef STACK_OF(ASN1_INTEGER) OSSL_CMP_POPODECKEYRESPCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_POPODECKEYRESPCONTENT)
typedef STACK_OF(OSSL_CMP_REVDETAILS) OSSL_CMP_REVREQCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_REVREQCONTENT)
typedef STACK_OF(X509_CRL) OSSL_CMP_CRLANNCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_CRLANNCONTENT)
typedef STACK_OF(OSSL_CMP_ITAV) OSSL_CMP_GENMSGCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_GENMSGCONTENT)
typedef STACK_OF(OSSL_CMP_ITAV) OSSL_CMP_GENREPCONTENT;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_GENREPCONTENT)

/*-
 *   PKIBody ::= CHOICE {           -- message-specific body elements
 *           ir       [0]  CertReqMessages,            --Initialization Request
 *           ip       [1]  CertRepMessage,             --Initialization Response
 *           cr       [2]  CertReqMessages,            --Certification Request
 *           cp       [3]  CertRepMessage,             --Certification Response
 *           p10cr    [4]  CertificationRequest,       --imported from [PKCS10]
 *           popdecc  [5]  POPODecKeyChallContent,     --pop Challenge
 *           popdecr  [6]  POPODecKeyRespContent,      --pop Response
 *           kur      [7]  CertReqMessages,            --Key Update Request
 *           kup      [8]  CertRepMessage,             --Key Update Response
 *           krr      [9]  CertReqMessages,            --Key Recovery Request
 *           krp      [10] KeyRecRepContent,           --Key Recovery Response
 *           rr       [11] RevReqContent,              --Revocation Request
 *           rp       [12] RevRepContent,              --Revocation Response
 *           ccr      [13] CertReqMessages,            --Cross-Cert. Request
 *           ccp      [14] CertRepMessage,             --Cross-Cert. Response
 *           ckuann   [15] CAKeyUpdAnnContent,         --CA Key Update Ann.
 *           cann     [16] CertAnnContent,             --Certificate Ann.
 *           rann     [17] RevAnnContent,              --Revocation Ann.
 *           crlann   [18] CRLAnnContent,              --CRL Announcement
 *           pkiconf  [19] PKIConfirmContent,          --Confirmation
 *           nested   [20] NestedMessageContent,       --Nested Message
 *           genm     [21] GenMsgContent,              --General Message
 *           genp     [22] GenRepContent,              --General Response
 *           error    [23] ErrorMsgContent,            --Error Message
 *           certConf [24] CertConfirmContent,         --Certificate confirm
 *           pollReq  [25] PollReqContent,             --Polling request
 *           pollRep  [26] PollRepContent              --Polling response
 *   }
 */
typedef struct ossl_cmp_pkibody_st {
    int type;
    union {
        OSSL_CRMF_MSGS *ir; /* 0 */
        OSSL_CMP_CERTREPMESSAGE *ip; /* 1 */
        OSSL_CRMF_MSGS *cr; /* 2 */
        OSSL_CMP_CERTREPMESSAGE *cp; /* 3 */
        /*-
         * p10cr      [4]  CertificationRequest,     --imported from [PKCS10]
         *
         * PKCS10_CERTIFICATIONREQUEST is effectively X509_REQ
         * so it is used directly
         */
        X509_REQ *p10cr; /* 4 */
        /*-
         * popdecc    [5]  POPODecKeyChallContent, --pop Challenge
         *
         * POPODecKeyChallContent ::= SEQUENCE OF Challenge
         */
        OSSL_CMP_POPODECKEYCHALLCONTENT *popdecc; /* 5 */
        /*-
         * popdecr    [6]  POPODecKeyRespContent,  --pop Response
         *
         * POPODecKeyRespContent ::= SEQUENCE OF INTEGER
         */
        OSSL_CMP_POPODECKEYRESPCONTENT *popdecr; /* 6 */
        OSSL_CRMF_MSGS *kur; /* 7 */
        OSSL_CMP_CERTREPMESSAGE *kup; /* 8 */
        OSSL_CRMF_MSGS *krr; /* 9 */

        /*-
         * krp        [10] KeyRecRepContent,         --Key Recovery Response
         */
        OSSL_CMP_KEYRECREPCONTENT *krp; /* 10 */
        /*-
         * rr         [11] RevReqContent,            --Revocation Request
         */
        OSSL_CMP_REVREQCONTENT *rr; /* 11 */
        /*-
         * rp         [12] RevRepContent,            --Revocation Response
         */
        OSSL_CMP_REVREPCONTENT *rp; /* 12 */
        /*-
         * ccr        [13] CertReqMessages,          --Cross-Cert. Request
         */
        OSSL_CRMF_MSGS *ccr; /* 13 */
        /*-
         * ccp        [14] CertRepMessage,           --Cross-Cert. Response
         */
        OSSL_CMP_CERTREPMESSAGE *ccp; /* 14 */
        /*-
         * ckuann     [15] CAKeyUpdAnnContent,       --CA Key Update Ann.
         */
        OSSL_CMP_CAKEYUPDANNCONTENT *ckuann; /* 15 */
        /*-
         * cann       [16] CertAnnContent,           --Certificate Ann.
         * OSSL_CMP_CMPCERTIFICATE is effectively X509 so it is used directly
         */
        X509 *cann; /* 16 */
        /*-
         * rann       [17] RevAnnContent,            --Revocation Ann.
         */
        OSSL_CMP_REVANNCONTENT *rann; /* 17 */
        /*-
         * crlann     [18] CRLAnnContent,            --CRL Announcement
         * CRLAnnContent ::= SEQUENCE OF CertificateList
         */
        OSSL_CMP_CRLANNCONTENT *crlann; /* 18 */
        /*-
         * PKIConfirmContent ::= NULL
         * pkiconf    [19] PKIConfirmContent,        --Confirmation
         * OSSL_CMP_PKICONFIRMCONTENT would be only a typedef of ASN1_NULL
         * OSSL_CMP_CONFIRMCONTENT *pkiconf;
         *
         * NOTE: this should ASN1_NULL according to the RFC
         * but there might be a struct in it when sent from faulty servers...
         */
        ASN1_TYPE *pkiconf; /* 19 */
        /*-
         * nested     [20] NestedMessageContent,     --Nested Message
         * NestedMessageContent ::= PKIMessages
         */
        OSSL_CMP_MSGS *nested; /* 20 */
        /*-
         * genm       [21] GenMsgContent,            --General Message
         * GenMsgContent ::= SEQUENCE OF InfoTypeAndValue
         */
        OSSL_CMP_GENMSGCONTENT *genm; /* 21 */
        /*-
         * genp       [22] GenRepContent,            --General Response
         * GenRepContent ::= SEQUENCE OF InfoTypeAndValue
         */
        OSSL_CMP_GENREPCONTENT *genp; /* 22 */
        /*-
         * error      [23] ErrorMsgContent,          --Error Message
         */
        OSSL_CMP_ERRORMSGCONTENT *error; /* 23 */
        /*-
         * certConf [24] CertConfirmContent,     --Certificate confirm
         */
        OSSL_CMP_CERTCONFIRMCONTENT *certConf; /* 24 */
        /*-
         * pollReq    [25] PollReqContent,           --Polling request
         */
        OSSL_CMP_POLLREQCONTENT *pollReq; /* 25 */
        /*-
         * pollRep    [26] PollRepContent            --Polling response
         */
        OSSL_CMP_POLLREPCONTENT *pollRep; /* 26 */
    } value;
} OSSL_CMP_PKIBODY;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_PKIBODY)

/*-
 *   PKIProtection ::= BIT STRING
 *
 *   PKIMessages ::= SEQUENCE SIZE (1..MAX) OF PKIMessage
 *
 *    PKIMessage ::= SEQUENCE {
 *           header           PKIHeader,
 *           body             PKIBody,
 *           protection   [0] PKIProtection OPTIONAL,
 *           extraCerts   [1] SEQUENCE SIZE (1..MAX) OF CMPCertificate
 *                                            OPTIONAL
 *   }
 */
struct ossl_cmp_msg_st {
    OSSL_CMP_PKIHEADER *header;
    OSSL_CMP_PKIBODY *body;
    ASN1_BIT_STRING *protection; /* 0 */
    /* OSSL_CMP_CMPCERTIFICATE is effectively X509 so it is used directly */
    STACK_OF(X509) *extraCerts; /* 1 */
    OSSL_LIB_CTX *libctx;
    char *propq;
} /* OSSL_CMP_MSG */;
OSSL_CMP_MSG *OSSL_CMP_MSG_new(OSSL_LIB_CTX *libctx, const char *propq);
void OSSL_CMP_MSG_free(OSSL_CMP_MSG *msg);

/*-
 * ProtectedPart ::= SEQUENCE {
 * header    PKIHeader,
 * body      PKIBody
 * }
 */
typedef struct ossl_cmp_protectedpart_st {
    OSSL_CMP_PKIHEADER *header;
    OSSL_CMP_PKIBODY *body;
} OSSL_CMP_PROTECTEDPART;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_PROTECTEDPART)

/*-
 *  this is not defined here as it is already in CRMF:
 *   id-PasswordBasedMac OBJECT IDENTIFIER ::= {1 2 840 113533 7 66 13}
 *   PBMParameter ::= SEQUENCE {
 *           salt                OCTET STRING,
 *           -- note:  implementations MAY wish to limit acceptable sizes
 *           -- of this string to values appropriate for their environment
 *           -- in order to reduce the risk of denial-of-service attacks
 *           owf                 AlgorithmIdentifier,
 *           -- AlgId for a One-Way Function (SHA-1 recommended)
 *           iterationCount      INTEGER,
 *           -- number of times the OWF is applied
 *           -- note:  implementations MAY wish to limit acceptable sizes
 *           -- of this integer to values appropriate for their environment
 *           -- in order to reduce the risk of denial-of-service attacks
 *           mac                 AlgorithmIdentifier
 *           -- the MAC AlgId (e.g., DES-MAC, Triple-DES-MAC [PKCS11],
 *   }       -- or HMAC [RFC2104, RFC2202])
 */
/*-
 *   Not supported:
 *   id-DHBasedMac OBJECT IDENTIFIER ::= {1 2 840 113533 7 66 30}
 *   DHBMParameter ::= SEQUENCE {
 *           owf                 AlgorithmIdentifier,
 *           -- AlgId for a One-Way Function (SHA-1 recommended)
 *           mac                 AlgorithmIdentifier
 *           -- the MAC AlgId (e.g., DES-MAC, Triple-DES-MAC [PKCS11],
 *   }       -- or HMAC [RFC2104, RFC2202])
 */
/*-
 * The following is not cared for, because it is described in section 5.2.5
 * that this is beyond the scope of CMP
 *   OOBCert ::= CMPCertificate
 *
 *   OOBCertHash ::= SEQUENCE {
 *           hashAlg         [0] AlgorithmIdentifier         OPTIONAL,
 *           certId          [1] CertId                      OPTIONAL,
 *           hashVal             BIT STRING
 *           -- hashVal is calculated over the DER encoding of the
 *           -- self-signed certificate with the identifier certID.
 *   }
 */

/*
 * RootCaKeyUpdateContent ::= SEQUENCE {
 *      newWithNew       CMPCertificate,
 *      newWithOld   [0] CMPCertificate OPTIONAL,
 *      oldWithNew   [1] CMPCertificate OPTIONAL
 * }
 */

struct ossl_cmp_rootcakeyupdate_st {
    X509 *newWithNew;
    X509 *newWithOld;
    X509 *oldWithNew;
} /* OSSL_CMP_ROOTCAKEYUPDATE */;
DECLARE_ASN1_FUNCTIONS(OSSL_CMP_ROOTCAKEYUPDATE)

/*-
 * CertReqTemplateContent ::= SEQUENCE {
 *      certTemplate      CertTemplate,
 *      keySpec           Controls OPTIONAL
 * }
 */
struct ossl_cmp_certreqtemplate_st {
    OSSL_CRMF_CERTTEMPLATE *certTemplate;
    OSSL_CMP_ATAVS *keySpec;
} /* OSSL_CMP_CERTREQTEMPLATE */;

/* from cmp_asn.c */
int ossl_cmp_asn1_get_int(const ASN1_INTEGER *a);

/* from cmp_util.c */
const char *ossl_cmp_log_parse_metadata(const char *buf,
                                        OSSL_CMP_severity *level, char **func,
                                        char **file, int *line);
# define ossl_cmp_add_error_data(txt) ERR_add_error_txt(" : ", txt)
# define ossl_cmp_add_error_line(txt) ERR_add_error_txt("\n", txt)
/* The two functions manipulating X509_STORE could be generally useful */
int ossl_cmp_X509_STORE_add1_certs(X509_STORE *store, STACK_OF(X509) *certs,
                                   int only_self_issued);
STACK_OF(X509) *ossl_cmp_X509_STORE_get1_certs(X509_STORE *store);
int ossl_cmp_sk_ASN1_UTF8STRING_push_str(STACK_OF(ASN1_UTF8STRING) *sk,
                                         const char *text, int len);
int ossl_cmp_asn1_octet_string_set1(ASN1_OCTET_STRING **tgt,
                                    const ASN1_OCTET_STRING *src);
int ossl_cmp_asn1_octet_string_set1_bytes(ASN1_OCTET_STRING **tgt,
                                          const unsigned char *bytes, int len);

/* from cmp_ctx.c */
int ossl_cmp_print_log(OSSL_CMP_severity level, const OSSL_CMP_CTX *ctx,
                       const char *func, const char *file, int line,
                       const char *level_str, const char *format, ...);
# define ossl_cmp_log(level, ctx, msg) \
    ossl_cmp_print_log(OSSL_CMP_LOG_##level, ctx, OPENSSL_FUNC, OPENSSL_FILE, \
                       OPENSSL_LINE, #level, "%s", msg)
# define ossl_cmp_log1(level, ctx, fmt, arg1) \
    ossl_cmp_print_log(OSSL_CMP_LOG_##level, ctx, OPENSSL_FUNC, OPENSSL_FILE, \
                       OPENSSL_LINE, #level, fmt, arg1)
# define ossl_cmp_log2(level, ctx, fmt, arg1, arg2) \
    ossl_cmp_print_log(OSSL_CMP_LOG_##level, ctx, OPENSSL_FUNC, OPENSSL_FILE, \
                       OPENSSL_LINE, #level, fmt, arg1, arg2)
# define ossl_cmp_log3(level, ctx, fmt, arg1, arg2, arg3) \
    ossl_cmp_print_log(OSSL_CMP_LOG_##level, ctx, OPENSSL_FUNC, OPENSSL_FILE, \
                       OPENSSL_LINE, #level, fmt, arg1, arg2, arg3)
# define ossl_cmp_log4(level, ctx, fmt, arg1, arg2, arg3, arg4)         \
    ossl_cmp_print_log(OSSL_CMP_LOG_##level, ctx, OPENSSL_FUNC, OPENSSL_FILE, \
                       OPENSSL_LINE, #level, fmt, arg1, arg2, arg3, arg4)
# define OSSL_CMP_LOG_ERROR OSSL_CMP_LOG_ERR
# define OSSL_CMP_LOG_WARN OSSL_CMP_LOG_WARNING
# define ossl_cmp_alert(ctx, msg) ossl_cmp_log(ALERT, ctx, msg)
# define ossl_cmp_err(ctx, msg)   ossl_cmp_log(ERROR, ctx, msg)
# define ossl_cmp_warn(ctx, msg)  ossl_cmp_log(WARN,  ctx, msg)
# define ossl_cmp_info(ctx, msg)  ossl_cmp_log(INFO,  ctx, msg)
# define ossl_cmp_debug(ctx, msg) ossl_cmp_log(DEBUG, ctx, msg)
# define ossl_cmp_trace(ctx, msg) ossl_cmp_log(TRACE, ctx, msg)
int ossl_cmp_ctx_set1_validatedSrvCert(OSSL_CMP_CTX *ctx, X509 *cert);
int ossl_cmp_ctx_set_status(OSSL_CMP_CTX *ctx, int status);
int ossl_cmp_ctx_set0_statusString(OSSL_CMP_CTX *ctx,
                                   OSSL_CMP_PKIFREETEXT *text);
int ossl_cmp_ctx_set_failInfoCode(OSSL_CMP_CTX *ctx, int fail_info);
int ossl_cmp_ctx_set0_newCert(OSSL_CMP_CTX *ctx, X509 *cert);
int ossl_cmp_ctx_set1_newChain(OSSL_CMP_CTX *ctx, STACK_OF(X509) *newChain);
int ossl_cmp_ctx_set1_caPubs(OSSL_CMP_CTX *ctx, STACK_OF(X509) *caPubs);
int ossl_cmp_ctx_set1_extraCertsIn(OSSL_CMP_CTX *ctx,
                                   STACK_OF(X509) *extraCertsIn);
int ossl_cmp_ctx_set1_recipNonce(OSSL_CMP_CTX *ctx,
                                 const ASN1_OCTET_STRING *nonce);
EVP_PKEY *ossl_cmp_ctx_get0_newPubkey(const OSSL_CMP_CTX *ctx);
int ossl_cmp_ctx_set1_first_senderNonce(OSSL_CMP_CTX *ctx,
                                        const ASN1_OCTET_STRING *nonce);

/* from cmp_status.c */
int ossl_cmp_pkisi_get_status(const OSSL_CMP_PKISI *si);
const char *ossl_cmp_PKIStatus_to_string(int status);
OSSL_CMP_PKIFREETEXT *ossl_cmp_pkisi_get0_statusString(const OSSL_CMP_PKISI *s);
int ossl_cmp_pkisi_get_pkifailureinfo(const OSSL_CMP_PKISI *si);
int ossl_cmp_pkisi_check_pkifailureinfo(const OSSL_CMP_PKISI *si, int index);

/* from cmp_hdr.c */
int ossl_cmp_hdr_set_pvno(OSSL_CMP_PKIHEADER *hdr, int pvno);
int ossl_cmp_hdr_get_pvno(const OSSL_CMP_PKIHEADER *hdr);
int ossl_cmp_hdr_get_protection_nid(const OSSL_CMP_PKIHEADER *hdr);
ASN1_OCTET_STRING *ossl_cmp_hdr_get0_senderNonce(const OSSL_CMP_PKIHEADER *hdr);
int ossl_cmp_general_name_is_NULL_DN(GENERAL_NAME *name);
int ossl_cmp_hdr_set1_sender(OSSL_CMP_PKIHEADER *hdr, const X509_NAME *nm);
int ossl_cmp_hdr_set1_recipient(OSSL_CMP_PKIHEADER *hdr, const X509_NAME *nm);
int ossl_cmp_hdr_update_messageTime(OSSL_CMP_PKIHEADER *hdr);
int ossl_cmp_hdr_set1_senderKID(OSSL_CMP_PKIHEADER *hdr,
                                const ASN1_OCTET_STRING *senderKID);
int ossl_cmp_hdr_push0_freeText(OSSL_CMP_PKIHEADER *hdr, ASN1_UTF8STRING *text);
int ossl_cmp_hdr_push1_freeText(OSSL_CMP_PKIHEADER *hdr, ASN1_UTF8STRING *text);
int ossl_cmp_hdr_generalInfo_push0_item(OSSL_CMP_PKIHEADER *hdr,
                                        OSSL_CMP_ITAV *itav);
int ossl_cmp_hdr_generalInfo_push1_items(OSSL_CMP_PKIHEADER *hdr,
                                         const STACK_OF(OSSL_CMP_ITAV) *itavs);
int ossl_cmp_hdr_set_implicitConfirm(OSSL_CMP_PKIHEADER *hdr);
int ossl_cmp_hdr_has_implicitConfirm(const OSSL_CMP_PKIHEADER *hdr);
# define OSSL_CMP_TRANSACTIONID_LENGTH 16
# define OSSL_CMP_SENDERNONCE_LENGTH 16
int ossl_cmp_hdr_set_transactionID(OSSL_CMP_CTX *ctx, OSSL_CMP_PKIHEADER *hdr);
int ossl_cmp_hdr_init(OSSL_CMP_CTX *ctx, OSSL_CMP_PKIHEADER *hdr);

/* from cmp_msg.c */
/* OSSL_CMP_MSG bodytype ASN.1 choice IDs */
# define OSSL_CMP_PKIBODY_IR        0
# define OSSL_CMP_PKIBODY_IP        1
# define OSSL_CMP_PKIBODY_CR        2
# define OSSL_CMP_PKIBODY_CP        3
# define OSSL_CMP_PKIBODY_P10CR     4
# define OSSL_CMP_PKIBODY_POPDECC   5
# define OSSL_CMP_PKIBODY_POPDECR   6
# define OSSL_CMP_PKIBODY_KUR       7
# define OSSL_CMP_PKIBODY_KUP       8
# define OSSL_CMP_PKIBODY_KRR       9
# define OSSL_CMP_PKIBODY_KRP      10
# define OSSL_CMP_PKIBODY_RR       11
# define OSSL_CMP_PKIBODY_RP       12
# define OSSL_CMP_PKIBODY_CCR      13
# define OSSL_CMP_PKIBODY_CCP      14
# define OSSL_CMP_PKIBODY_CKUANN   15
# define OSSL_CMP_PKIBODY_CANN     16
# define OSSL_CMP_PKIBODY_RANN     17
# define OSSL_CMP_PKIBODY_CRLANN   18
# define OSSL_CMP_PKIBODY_PKICONF  19
# define OSSL_CMP_PKIBODY_NESTED   20
# define OSSL_CMP_PKIBODY_GENM     21
# define OSSL_CMP_PKIBODY_GENP     22
# define OSSL_CMP_PKIBODY_ERROR    23
# define OSSL_CMP_PKIBODY_CERTCONF 24
# define OSSL_CMP_PKIBODY_POLLREQ  25
# define OSSL_CMP_PKIBODY_POLLREP  26
# define OSSL_CMP_PKIBODY_TYPE_MAX OSSL_CMP_PKIBODY_POLLREP
/* certReqId for the first - and so far only - certificate request */
# define OSSL_CMP_CERTREQID         0
# define OSSL_CMP_CERTREQID_NONE    -1
# define OSSL_CMP_CERTREQID_INVALID -2
/* sequence id for the first - and so far only - revocation request */
# define OSSL_CMP_REVREQSID 0
int ossl_cmp_msg_set0_libctx(OSSL_CMP_MSG *msg, OSSL_LIB_CTX *libctx,
                             const char *propq);
const char *ossl_cmp_bodytype_to_string(int type);
int ossl_cmp_msg_set_bodytype(OSSL_CMP_MSG *msg, int type);
OSSL_CMP_MSG *ossl_cmp_msg_create(OSSL_CMP_CTX *ctx, int bodytype);
OSSL_CMP_MSG *ossl_cmp_certreq_new(OSSL_CMP_CTX *ctx, int bodytype,
                                   const OSSL_CRMF_MSG *crm);
OSSL_CMP_MSG *ossl_cmp_certrep_new(OSSL_CMP_CTX *ctx, int bodytype,
                                   int certReqId, const OSSL_CMP_PKISI *si,
                                   X509 *cert, const X509 *encryption_recip,
                                   STACK_OF(X509) *chain, STACK_OF(X509) *caPubs,
                                   int unprotectedErrors);
OSSL_CMP_MSG *ossl_cmp_rr_new(OSSL_CMP_CTX *ctx);
OSSL_CMP_MSG *ossl_cmp_rp_new(OSSL_CMP_CTX *ctx, const OSSL_CMP_PKISI *si,
                              const OSSL_CRMF_CERTID *cid,
                              int unprotectedErrors);
OSSL_CMP_MSG *ossl_cmp_pkiconf_new(OSSL_CMP_CTX *ctx);
OSSL_CMP_MSG *ossl_cmp_pollRep_new(OSSL_CMP_CTX *ctx, int crid,
                                   int64_t poll_after);
int ossl_cmp_msg_gen_push0_ITAV(OSSL_CMP_MSG *msg, OSSL_CMP_ITAV *itav);
int ossl_cmp_msg_gen_push1_ITAVs(OSSL_CMP_MSG *msg,
                                 const STACK_OF(OSSL_CMP_ITAV) *itavs);
OSSL_CMP_MSG *ossl_cmp_genm_new(OSSL_CMP_CTX *ctx);
OSSL_CMP_MSG *ossl_cmp_genp_new(OSSL_CMP_CTX *ctx,
                                const STACK_OF(OSSL_CMP_ITAV) *itavs);
OSSL_CMP_MSG *ossl_cmp_error_new(OSSL_CMP_CTX *ctx, const OSSL_CMP_PKISI *si,
                                 int64_t errorCode, const char *details,
                                 int unprotected);
int ossl_cmp_certstatus_set0_certHash(OSSL_CMP_CERTSTATUS *certStatus,
                                      ASN1_OCTET_STRING *hash);
OSSL_CMP_MSG *ossl_cmp_certConf_new(OSSL_CMP_CTX *ctx, int certReqId,
                                    int fail_info, const char *text);
OSSL_CMP_MSG *ossl_cmp_pollReq_new(OSSL_CMP_CTX *ctx, int crid);
OSSL_CMP_MSG *ossl_cmp_pollRep_new(OSSL_CMP_CTX *ctx, int crid,
                                   int64_t poll_after);
OSSL_CMP_PKISI *
ossl_cmp_revrepcontent_get_pkisi(OSSL_CMP_REVREPCONTENT *rrep, int rsid);
OSSL_CRMF_CERTID *ossl_cmp_revrepcontent_get_CertId(OSSL_CMP_REVREPCONTENT *rc,
                                                    int rsid);
OSSL_CMP_POLLREP *
ossl_cmp_pollrepcontent_get0_pollrep(const OSSL_CMP_POLLREPCONTENT *prc,
                                     int rid);
OSSL_CMP_CERTRESPONSE *
ossl_cmp_certrepmessage_get0_certresponse(const OSSL_CMP_CERTREPMESSAGE *crm,
                                          int rid);
X509 *ossl_cmp_certresponse_get1_cert(const OSSL_CMP_CTX *ctx,
                                      const OSSL_CMP_CERTRESPONSE *crep);
OSSL_CMP_MSG *ossl_cmp_msg_load(const char *file);
int ossl_cmp_is_error_with_waiting(const OSSL_CMP_MSG *msg);

/* from cmp_protect.c */
int ossl_cmp_msg_add_extraCerts(OSSL_CMP_CTX *ctx, OSSL_CMP_MSG *msg);
ASN1_BIT_STRING *ossl_cmp_calc_protection(const OSSL_CMP_CTX *ctx,
                                          const OSSL_CMP_MSG *msg);
int ossl_cmp_msg_protect(OSSL_CMP_CTX *ctx, OSSL_CMP_MSG *msg);

/* from cmp_vfy.c */
typedef int (*ossl_cmp_allow_unprotected_cb_t)(const OSSL_CMP_CTX *ctx,
                                               const OSSL_CMP_MSG *msg,
                                               int invalid_protection, int arg);
int ossl_cmp_msg_check_update(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *msg,
                              ossl_cmp_allow_unprotected_cb_t cb, int cb_arg);
int ossl_cmp_msg_check_received(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *msg,
                                ossl_cmp_allow_unprotected_cb_t cb, int cb_arg);
int ossl_cmp_verify_popo(const OSSL_CMP_CTX *ctx,
                         const OSSL_CMP_MSG *msg, int accept_RAVerified);

/* from cmp_client.c */
/* expected max time per msg round trip, used for last try during polling: */
# define OSSL_CMP_EXPECTED_RESP_TIME 2
int ossl_cmp_exchange_certConf(OSSL_CMP_CTX *ctx, int certReqId,
                               int fail_info, const char *txt);
int ossl_cmp_exchange_error(OSSL_CMP_CTX *ctx, int status, int fail_info,
                            const char *txt, int errorCode, const char *detail);

#endif /* !defined(OSSL_CRYPTO_CMP_LOCAL_H) */
