#include "pEp_internal.h"

#include "dynamic_api.h"

#include "cryptotech.h"

#include "transport.h"

int init_count = -1;

DYNAMIC_API PEP_STATUS init(PEP_SESSION *session)

{

    PEP_STATUS status = PEP_STATUS_OK;

	int int_result;

	static const char *sql_log;

	static const char *sql_safeword;

	static const char *sql_get_identity;

	static const char *sql_set_person;

	static const char *sql_set_pgp_keypair;

	static const char *sql_set_identity;

	static const char *sql_set_trust;

    static const char *sql_get_trust;

    bool in_first = false;

    assert(sqlite3_threadsafe());

    if (!sqlite3_threadsafe())

        return PEP_INIT_SQLITE3_WITHOUT_MUTEX;

    // a little race condition - but still a race condition

    // mitigated by calling caveat (see documentation)

    ++init_count;

    if (init_count == 0)

        in_first = true;

	assert(session);

    if (session == NULL)

        return PEP_ILLEGAL_VALUE;

	*session = NULL;

    pEpSession *_session = calloc(1, sizeof(pEpSession));

	assert(_session);

	if (_session == NULL)

		goto enomem;

	_session->version = PEP_ENGINE_VERSION;

    assert(LOCAL_DB);

    if (LOCAL_DB == NULL) {

        status = PEP_INIT_CANNOT_OPEN_DB;

        goto pep_error;

    }

	int_result = sqlite3_open_v2(

			LOCAL_DB,

			&_session->db,

			SQLITE_OPEN_READWRITE

				| SQLITE_OPEN_CREATE

				| SQLITE_OPEN_FULLMUTEX

				| SQLITE_OPEN_PRIVATECACHE,

			NULL 

		);

	if (int_result != SQLITE_OK) {

		status = PEP_INIT_CANNOT_OPEN_DB;

        goto pep_error;

	}

	sqlite3_busy_timeout(_session->db, BUSY_WAIT_TIME);

    assert(SYSTEM_DB);

    if (SYSTEM_DB == NULL) {

		status = PEP_INIT_CANNOT_OPEN_SYSTEM_DB;

        goto pep_error;

    }

	int_result = sqlite3_open_v2(

			SYSTEM_DB, &_session->system_db,

			SQLITE_OPEN_READONLY

				| SQLITE_OPEN_FULLMUTEX

				| SQLITE_OPEN_SHAREDCACHE,

			NULL

		);

	if (int_result != SQLITE_OK) {

		status = PEP_INIT_CANNOT_OPEN_SYSTEM_DB;

        goto pep_error;

	}

	sqlite3_busy_timeout(_session->system_db, 1000);

    if (in_first) {

        int_result = sqlite3_exec(

            _session->db,

                "create table if not exists version_info ("

                "	id integer primary key,"

                "	timestamp integer default (datetime('now')) ,"

                "	version text,"

                "	comment text"

                ");"

                "create table if not exists log ("

                "	timestamp integer default (datetime('now')) ,"

                "	title text not null,"

                "	entity text not null,"

                "	description text,"

                "	comment text"

                ");"

                "create index if not exists log_timestamp on log ("

                "	timestamp"

                ");"

                "create table if not exists pgp_keypair ("

                "	fpr text primary key,"

                "	public_id text unique,"

                "   private_id text,"

                "	created integer,"

                "	expires integer,"

                "	comment text"

                ");"

                "create index if not exists pgp_keypair_expires on pgp_keypair ("

                "	expires"

                ");"

                "create table if not exists person ("

                "	id text primary key,"

                "	username text not null,"

                "	main_key_id text"

                "		references pgp_keypair (fpr)"

                "		on delete set null,"

                "   lang text,"

                "	comment text"

                ");"

                "create table if not exists identity ("

                "	address text primary key,"

                "	user_id text"

                "		references person (id)"

                "		on delete cascade,"

                "	main_key_id text"

                "		references pgp_keypair (fpr)"

                "		on delete set null,"

                "	comment text"

                ");"

                "create table if not exists trust ("

                "   user_id text not null"

                "       references person (id)"

                "		on delete cascade,"

                "   pgp_keypair_fpr text not null"

                "       references pgp_keypair (fpr)"

                "       on delete cascade,"

                "   comm_type integer not null,"

                "	comment text"

                ");"

                "create unique index if not exists trust_index on trust ("

                "   user_id,"

                "   pgp_keypair_fpr"

                ");",

            NULL,

            NULL,

            NULL

        );

        assert(int_result == SQLITE_OK);

        int_result = sqlite3_exec(

            _session->db,

            "insert or replace into version_info (id, version) values (1, '1.0');",

            NULL,

            NULL,

            NULL

        );

        assert(int_result == SQLITE_OK);

        sql_log = "insert into log (title, entity, description, comment)"

                  "values (?1, ?2, ?3, ?4);";

        sql_get_identity =	"select fpr, identity.user_id, username, comm_type, lang"

                            "   from identity"

                            "   join person on id = identity.user_id"

                            "   join pgp_keypair on fpr = identity.main_key_id"

                            "   join trust on id = trust.user_id"

                            "       and pgp_keypair_fpr = identity.main_key_id"

                            "   where address = ?1 ;";

        sql_safeword = "select id, word from wordlist where lang = lower(?1) "

                       "and id = ?2 ;";

        sql_set_person = "insert or replace into person (id, username, lang) "

                         "values (?1, ?2, ?3) ;";

        sql_set_pgp_keypair = "insert or replace into pgp_keypair (fpr) "

                              "values (?1) ;";

        sql_set_identity = "insert or replace into identity (address, main_key_id, "

                           "user_id) values (?1, ?2, ?3) ;";

        sql_set_trust = "insert or replace into trust (user_id, pgp_keypair_fpr, comm_type) "

                        "values (?1, ?2, ?3) ;";

        sql_get_trust = "select user_id, comm_type from trust where user_id = ?1 "

                        "and pgp_keypair_fpr = ?2 ;";

    }

    int_result = sqlite3_prepare_v2(_session->db, sql_log, strlen(sql_log),

            &_session->log, NULL);

	assert(int_result == SQLITE_OK);

    int_result = sqlite3_prepare_v2(_session->system_db, sql_safeword,

            strlen(sql_safeword), &_session->safeword, NULL);

	assert(int_result == SQLITE_OK);

    int_result = sqlite3_prepare_v2(_session->db, sql_get_identity,

            strlen(sql_get_identity), &_session->get_identity, NULL);

	assert(int_result == SQLITE_OK);

    int_result = sqlite3_prepare_v2(_session->db, sql_set_person,

            strlen(sql_set_person), &_session->set_person, NULL);

    assert(int_result == SQLITE_OK);

    int_result = sqlite3_prepare_v2(_session->db, sql_set_pgp_keypair,

            strlen(sql_set_pgp_keypair), &_session->set_pgp_keypair, NULL);

	assert(int_result == SQLITE_OK);

    int_result = sqlite3_prepare_v2(_session->db, sql_set_identity,

            strlen(sql_set_identity), &_session->set_identity, NULL);

	assert(int_result == SQLITE_OK);

    int_result = sqlite3_prepare_v2(_session->db, sql_set_trust,

            strlen(sql_set_trust), &_session->set_trust, NULL);

	assert(int_result == SQLITE_OK);

    int_result = sqlite3_prepare_v2(_session->db, sql_get_trust,

            strlen(sql_get_trust), &_session->get_trust, NULL);

    assert(int_result == SQLITE_OK);

    status = init_cryptotech(_session, in_first);

    if (status != PEP_STATUS_OK)

        goto pep_error;

    status = init_transport_system(_session, in_first);

    if (status != PEP_STATUS_OK)

        goto pep_error;

    status = log_event(_session, "init", "pEp " PEP_ENGINE_VERSION, NULL, NULL);

    if (status != PEP_STATUS_OK)

        goto pep_error;

	*session = _session;

	return PEP_STATUS_OK;

enomem:

    status = PEP_OUT_OF_MEMORY;

pep_error:

    release(_session);

    return status;

}

DYNAMIC_API void release(PEP_SESSION session)

{

    bool out_last = false;

    assert(init_count >= 0);

	assert(session);

    if (!(init_count && session))

        return;

    // a small race condition but still a race condition

    // mitigated by calling caveat (see documentation)

    if (init_count == 0)

        out_last = true;

    --init_count;

	if (session) {

		if (session->db) {

            if (session->safeword)

                sqlite3_finalize(session->safeword);

            if (session->log)

                sqlite3_finalize(session->log);

            if (session->get_identity)

                sqlite3_finalize(session->get_identity);

            if (session->set_identity)

                sqlite3_finalize(session->set_identity);

            if (session->set_person)

                sqlite3_finalize(session->set_person);

            if (session->set_pgp_keypair)

                sqlite3_finalize(session->set_pgp_keypair);

            if (session->set_trust)

                sqlite3_finalize(session->set_trust);

            if (session->get_trust)

                sqlite3_finalize(session->get_trust);

            if (session->db)

                sqlite3_close_v2(session->db);

            if (session->system_db)

                sqlite3_close_v2(session->system_db);

		}

        release_transport_system(session, out_last);

        release_cryptotech(session, out_last);

        free(session);

    }

}

DYNAMIC_API PEP_STATUS log_event(

        PEP_SESSION session, const char *title, const char *entity,

        const char *description, const char *comment

    )

{

	PEP_STATUS status = PEP_STATUS_OK;

	int result;

	assert(session);

	assert(title);

	assert(entity);

    if (!(session && title && entity))

        return PEP_ILLEGAL_VALUE;

	sqlite3_reset(session->log);

	sqlite3_bind_text(session->log, 1, title, -1, SQLITE_STATIC);

	sqlite3_bind_text(session->log, 2, entity, -1, SQLITE_STATIC);

	if (description)

        sqlite3_bind_text(session->log, 3, description, -1, SQLITE_STATIC);

	else

		sqlite3_bind_null(session->log, 3);

	if (comment)

		sqlite3_bind_text(session->log, 4, comment, -1, SQLITE_STATIC);

	else

		sqlite3_bind_null(session->log, 4);

	do {

		result = sqlite3_step(session->log);

		assert(result == SQLITE_DONE || result == SQLITE_BUSY);

		if (result != SQLITE_DONE && result != SQLITE_BUSY)

			status = PEP_UNKNOWN_ERROR;

	} while (result == SQLITE_BUSY);

	sqlite3_reset(session->log);

	return status;

}

DYNAMIC_API PEP_STATUS safeword(

            PEP_SESSION session, uint16_t value, const char *lang,

            char **word, size_t *wsize

        )

{

	PEP_STATUS status = PEP_STATUS_OK;

	int result;

	assert(session);

	assert(word);

	assert(wsize);

    if (!(session && word && wsize))

        return PEP_ILLEGAL_VALUE;

	*word = NULL;

	*wsize = 0;

	if (lang == NULL)

		lang = "en";

	assert((lang[0] >= 'A' && lang[0] <= 'Z')

            || (lang[0] >= 'a' && lang[0] <= 'z'));

	assert((lang[1] >= 'A' && lang[1] <= 'Z')

            || (lang[1] >= 'a' && lang[1] <= 'z'));

	assert(lang[2] == 0);

	sqlite3_reset(session->safeword);

    sqlite3_bind_text(session->safeword, 1, lang, -1, SQLITE_STATIC);

	sqlite3_bind_int(session->safeword, 2, value);

	result = sqlite3_step(session->safeword);

	if (result == SQLITE_ROW) {

        *word = strdup((const char *) sqlite3_column_text(session->safeword,

                    1));

		if (*word)

            *wsize = sqlite3_column_bytes(session->safeword, 1);

		else

			status = PEP_SAFEWORD_NOT_FOUND;

	} else

		status = PEP_SAFEWORD_NOT_FOUND;

	sqlite3_reset(session->safeword);

	return status;

}

DYNAMIC_API PEP_STATUS safewords(

        PEP_SESSION session, const char *fingerprint, const char *lang,

        char **words, size_t *wsize, int max_words

    )

{

	const char *source = fingerprint;

	char *buffer;

	char *dest;

	size_t fsize;

    PEP_STATUS _status;

	assert(session);

	assert(fingerprint);

	assert(words);

	assert(wsize);

	assert(max_words >= 0);

    if (!(session && fingerprint && words && wsize && max_words >= 0))

        return PEP_ILLEGAL_VALUE;

	*words = NULL;

	*wsize = 0;

    buffer = calloc(1, MAX_SAFEWORDS_SPACE);

    assert(buffer);

    if (buffer == NULL)

        return PEP_OUT_OF_MEMORY;

    dest = buffer;

	fsize = strlen(fingerprint);

	if (lang == NULL)

		lang = "en";

	assert((lang[0] >= 'A' && lang[0] <= 'Z')

            || (lang[0] >= 'a' && lang[0] <= 'z'));

	assert((lang[1] >= 'A' && lang[1] <= 'Z')

            || (lang[1] >= 'a' && lang[1] <= 'z'));

	assert(lang[2] == 0);

	int n_words = 0;

	while (source < fingerprint + fsize) {

		uint16_t value;

		char *word;

		size_t _wsize;

		int j;

        for (value=0, j=0; j < 4 && source < fingerprint + fsize; ) {

			if (*source >= 'a' && *source <= 'f')

				value += (*source - 'a' + 10) << (3 - j++) * 4;

			else if (*source >= 'A' && *source <= 'F')

				value += (*source - 'A' + 10) << (3 - j++) * 4;

			else if (*source >= '0' && *source <= '9')

				value += (*source - '0') << (3 - j++) * 4;

			source++;

		}

		_status = safeword(session, value, lang, &word, &_wsize);

        if (_status == PEP_OUT_OF_MEMORY) {

            free(buffer);

            return PEP_OUT_OF_MEMORY;

        }

		if (word == NULL) {

            free(buffer);

			return PEP_SAFEWORD_NOT_FOUND;

        }

		if (dest + _wsize < buffer + MAX_SAFEWORDS_SPACE - 1) {

			strncpy(dest, word, _wsize);

            free(word);

			dest += _wsize;

		}

		else {

            free(word);

			break; // buffer full

        }

		if (source < fingerprint + fsize

                && dest + _wsize < buffer + MAX_SAFEWORDS_SPACE - 1)

			*dest++ = ' ';

		++n_words;

		if (max_words && n_words >= max_words)

			break;

	}

	*words = buffer;

	*wsize = dest - buffer;

	return PEP_STATUS_OK;

}

pEp_identity *new_identity(

        const char *address, const char *fpr, const char *user_id,

        const char *username

    )

{

    pEp_identity *result = calloc(1, sizeof(pEp_identity));

    assert(result);

    if (result) {

        if (address) {

            result->address = strdup(address);

            assert(result->address);

            if (result->address == NULL) {

                free(result);

                return NULL;

            }

            result->address_size = strlen(address);

        }

        if (fpr) {

            result->fpr = strdup(fpr);

            assert(result->fpr);

            if (result->fpr == NULL) {

                free_identity(result);

                return NULL;

            }

            result->fpr_size = strlen(fpr);

        }

        if (user_id) {

            result->user_id = strdup(user_id);

            assert(result->user_id);

            if (result->user_id == NULL) {

                free_identity(result);

                return NULL;

            }

            result->user_id_size = strlen(user_id);

        }

        if (username) {

            result->username = strdup(username);

            assert(result->username);

            if (result->username == NULL) {

                free_identity(result);

                return NULL;

            }

            result->username_size = strlen(username);

        }

        result->struct_size = sizeof(pEp_identity);

    }

    return result;

}

pEp_identity *identity_dup(const pEp_identity *src)

{

    assert(src);

    pEp_identity *dup = new_identity(src->address, src->fpr, src->user_id, src->username);

    assert(dup);

    if (dup == NULL)

        return NULL;

    dup->comm_type = src->comm_type;

    dup->lang[0] = src->lang[0];

    dup->lang[1] = src->lang[1];

    dup->lang[2] = 0;

    dup->me = src->me;

    return dup;

}

void free_identity(pEp_identity *identity)

{

    if (identity) {

        free(identity->address);

        free(identity->fpr);

        free(identity->user_id);

        free(identity->username);

        free(identity);

    }

}

DYNAMIC_API PEP_STATUS get_identity(

        PEP_SESSION session, const char *address,

        pEp_identity **identity

    )

{

	PEP_STATUS status = PEP_STATUS_OK;

	static pEp_identity *_identity;

	int result;

	const char *_lang;

	assert(session);

	assert(address);

    assert(address[0]);

    if (!(session && address && address[0]))

        return PEP_ILLEGAL_VALUE;

    sqlite3_reset(session->get_identity);

    sqlite3_bind_text(session->get_identity, 1, address, -1, SQLITE_STATIC);

    result = sqlite3_step(session->get_identity);

	switch (result) {

	case SQLITE_ROW:

        _identity = new_identity(

                address,

                (const char *) sqlite3_column_text(session->get_identity, 0),

                (const char *) sqlite3_column_text(session->get_identity, 1),

                (const char *) sqlite3_column_text(session->get_identity, 2)

                );

        assert(_identity);

        if (_identity == NULL)

            return PEP_OUT_OF_MEMORY;

        _identity->comm_type = (PEP_comm_type) sqlite3_column_int(session->get_identity, 3);

        _lang = (const char *) sqlite3_column_text(session->get_identity, 4);

        if (_lang && _lang[0]) {

			assert(_lang[0] >= 'a' && _lang[0] <= 'z');

			assert(_lang[1] >= 'a' && _lang[1] <= 'z');

			assert(_lang[2] == 0);

			_identity->lang[0] = _lang[0];

			_identity->lang[1] = _lang[1];

            _identity->lang[2] = 0;

		}

		*identity = _identity;

		break;

	default:

        status = PEP_CANNOT_FIND_IDENTITY;

		*identity = NULL;

	}

    sqlite3_reset(session->get_identity);

	return status;

}

DYNAMIC_API PEP_STATUS set_identity(

        PEP_SESSION session, const pEp_identity *identity

    )

{

	int result;

	assert(session);

	assert(identity);

	assert(identity->address);

	assert(identity->fpr);

	assert(identity->user_id);

	assert(identity->username);

    if (!(session && identity && identity->address && identity->fpr &&

                identity->user_id && identity->username))

        return PEP_ILLEGAL_VALUE;

	sqlite3_exec(session->db, "BEGIN ;", NULL, NULL, NULL);

	sqlite3_reset(session->set_person);

    sqlite3_bind_text(session->set_person, 1, identity->user_id, -1,

            SQLITE_STATIC);

    sqlite3_bind_text(session->set_person, 2, identity->username, -1,

            SQLITE_STATIC);

	if (identity->lang[0])

        sqlite3_bind_text(session->set_person, 3, identity->lang, 1,

                SQLITE_STATIC);

	else

		sqlite3_bind_null(session->set_person, 3);

	result = sqlite3_step(session->set_person);

	sqlite3_reset(session->set_person);

	if (result != SQLITE_DONE) {

		sqlite3_exec(session->db, "ROLLBACK ;", NULL, NULL, NULL);

		return PEP_CANNOT_SET_PERSON;

	}

	sqlite3_reset(session->set_pgp_keypair);

    sqlite3_bind_text(session->set_pgp_keypair, 1, identity->fpr, -1,

            SQLITE_STATIC);

	result = sqlite3_step(session->set_pgp_keypair);

	sqlite3_reset(session->set_pgp_keypair);

	if (result != SQLITE_DONE) {

		sqlite3_exec(session->db, "ROLLBACK ;", NULL, NULL, NULL);

		return PEP_CANNOT_SET_PGP_KEYPAIR;

	}

	sqlite3_reset(session->set_identity);

    sqlite3_bind_text(session->set_identity, 1, identity->address, -1,

            SQLITE_STATIC);

    sqlite3_bind_text(session->set_identity, 2, identity->fpr, -1,

            SQLITE_STATIC);

    sqlite3_bind_text(session->set_identity, 3, identity->user_id, -1,

            SQLITE_STATIC);

	result = sqlite3_step(session->set_identity);

	sqlite3_reset(session->set_identity);

	if (result != SQLITE_DONE) {

		sqlite3_exec(session->db, "ROLLBACK ;", NULL, NULL, NULL);

		return PEP_CANNOT_SET_IDENTITY;

	}

	sqlite3_reset(session->set_trust);

    sqlite3_bind_text(session->set_trust, 1, identity->user_id, -1,

            SQLITE_STATIC);

    sqlite3_bind_text(session->set_trust, 2, identity->fpr, -1,

            SQLITE_STATIC);

	sqlite3_bind_int(session->set_trust, 3, identity->comm_type);

	result = sqlite3_step(session->set_trust);

	sqlite3_reset(session->set_trust);

	if (result != SQLITE_DONE) {

		sqlite3_exec(session->db, "ROLLBACK ;", NULL, NULL, NULL);

		return PEP_CANNOT_SET_IDENTITY;

	}

    result = sqlite3_exec(session->db, "COMMIT ;", NULL, NULL, NULL);

	if (result == SQLITE_OK)

		return PEP_STATUS_OK;

	else

		return PEP_COMMIT_FAILED;

}

void pEp_free(void *p)

{

    free(p);

}

DYNAMIC_API PEP_STATUS get_trust(PEP_SESSION session, pEp_identity *identity)

{

    PEP_STATUS status = PEP_STATUS_OK;

    int result;

    assert(session);

    assert(identity);

    assert(identity->user_id);

    assert(identity->user_id[0]);

    assert(identity->fpr);

    assert(identity->fpr[0]);

    if (!(session && identity && identity->user_id && identity->user_id[0] &&

                identity->fpr && identity->fpr[0]))

        return PEP_ILLEGAL_VALUE;

    identity->comm_type = PEP_ct_unknown;

    sqlite3_reset(session->get_trust);

    sqlite3_bind_text(session->get_trust, 1, identity->user_id, -1, SQLITE_STATIC);

    sqlite3_bind_text(session->get_trust, 2, identity->fpr, -1, SQLITE_STATIC);

    result = sqlite3_step(session->get_trust);

    switch (result) {

    case SQLITE_ROW: {

        const char * user_id = (const char *) sqlite3_column_text(session->get_trust, 1);

        int comm_type = (PEP_comm_type) sqlite3_column_int(session->get_trust, 2);

        if (strcmp(user_id, identity->user_id) != 0) {

            free(identity->user_id);

            identity->user_id = strdup(user_id);

            assert(identity->user_id);

            if (identity->user_id == NULL)

                return PEP_OUT_OF_MEMORY;

        }

        identity->comm_type = comm_type;

        break;

    }

    default:

        status = PEP_CANNOT_FIND_IDENTITY;

    }

    sqlite3_reset(session->get_trust);

    return status;

}

DYNAMIC_API PEP_STATUS decrypt_and_verify(

    PEP_SESSION session, const char *ctext, size_t csize,

    char **ptext, size_t *psize, stringlist_t **keylist

    )

{

    assert(session);

    assert(ctext);

    assert(csize);

    assert(ptext);

    assert(psize);

    assert(keylist);

    if (!(session && ctext && csize && ptext && psize && keylist && keylist))

        return PEP_ILLEGAL_VALUE;

    return session->cryptotech[PEP_crypt_OpenPGP].decrypt_and_verify(session, ctext, csize, ptext, psize, keylist);

}

DYNAMIC_API PEP_STATUS encrypt_and_sign(

    PEP_SESSION session, const stringlist_t *keylist, const char *ptext,

    size_t psize, char **ctext, size_t *csize

    )

{

    assert(session);

    assert(keylist);

    assert(ptext);

    assert(psize);

    assert(ctext);

    assert(csize);

    if (!(session && keylist && ptext && psize && ctext && csize))

        return PEP_ILLEGAL_VALUE;

    return session->cryptotech[PEP_crypt_OpenPGP].encrypt_and_sign(session, keylist, ptext, psize, ctext, csize);

}

DYNAMIC_API PEP_STATUS verify_text(

    PEP_SESSION session, const char *text, size_t size,

    const char *signature, size_t sig_size, stringlist_t **keylist

    )

{

    assert(session);

    assert(text);

    assert(size);

    assert(signature);

    assert(sig_size);

    assert(keylist);

    if (!(session && text && size && signature && sig_size && keylist))

        return PEP_ILLEGAL_VALUE;

    return session->cryptotech[PEP_crypt_OpenPGP].verify_text(session, text, size, signature, sig_size, keylist);

}

DYNAMIC_API PEP_STATUS delete_keypair(PEP_SESSION session, const char *fpr)

{

    assert(session);

    assert(fpr);

    if (!(session && fpr))

        return PEP_ILLEGAL_VALUE;

    return session->cryptotech[PEP_crypt_OpenPGP].delete_keypair(session, fpr);

}

DYNAMIC_API PEP_STATUS export_key(

        PEP_SESSION session, const char *fpr, char **key_data, size_t *size

    )

{

    assert(session);

    assert(fpr);

    assert(key_data);

    assert(size);

    if (!(session && fpr && key_data && size))

        return PEP_ILLEGAL_VALUE;

    return session->cryptotech[PEP_crypt_OpenPGP].export_key(session, fpr, key_data, size);

}

DYNAMIC_API PEP_STATUS find_keys(

        PEP_SESSION session, const char *pattern, stringlist_t **keylist

    )

{

    assert(session);

    assert(pattern);

    assert(keylist);

    if (!(session && pattern && keylist))

        return PEP_ILLEGAL_VALUE;

    return session->cryptotech[PEP_crypt_OpenPGP].find_keys(session, pattern, keylist);

}

DYNAMIC_API PEP_STATUS generate_keypair(

        PEP_SESSION session, pEp_identity *identity

    )

{

    assert(session);

    assert(identity);

    assert(identity->address);

    assert(identity->fpr == NULL);

    assert(identity->username);

    if (!(session && identity && identity->address && identity->fpr == NULL &&

                identity->username))

        return PEP_ILLEGAL_VALUE;

    return session->cryptotech[PEP_crypt_OpenPGP].generate_keypair(session, identity);

}

DYNAMIC_API PEP_STATUS get_key_rating(

        PEP_SESSION session,

        const char *fpr,

        PEP_comm_type *comm_type

    )

{

    assert(session);

    assert(fpr);

    assert(comm_type);

    if (!(session && fpr && comm_type))

        return PEP_ILLEGAL_VALUE;

    return session->cryptotech[PEP_crypt_OpenPGP].get_key_rating(session, fpr, comm_type);

}

DYNAMIC_API PEP_STATUS import_key(PEP_SESSION session, const char *key_data, size_t size)

{

    assert(session);

    assert(key_data);

    if (!(session && key_data))

        return PEP_ILLEGAL_VALUE;

    return session->cryptotech[PEP_crypt_OpenPGP].import_key(session, key_data, size);

}

DYNAMIC_API PEP_STATUS recv_key(PEP_SESSION session, const char *pattern)

{

    assert(session);

    assert(pattern);

    if (!(session && pattern))

        return PEP_ILLEGAL_VALUE;

    return session->cryptotech[PEP_crypt_OpenPGP].recv_key(session, pattern);

}

DYNAMIC_API PEP_STATUS send_key(PEP_SESSION session, const char *pattern)

{

    assert(session);

    assert(pattern);

    if (!(session && pattern))

        return PEP_ILLEGAL_VALUE;

    return session->cryptotech[PEP_crypt_OpenPGP].send_key(session, pattern);

}

DYNAMIC_API PEP_STATUS renew_key(PEP_SESSION session, const char *key_id)

{

    assert(session);

    assert(key_id);

    if (!(session && key_id))

        return PEP_ILLEGAL_VALUE;

    return PEP_UNKNOWN_ERROR;

}

DYNAMIC_API PEP_STATUS revoke_key(PEP_SESSION session, const char *key_id)

{

    assert(session);

    assert(key_id);

    if (!(session && key_id))

        return PEP_ILLEGAL_VALUE;

    return PEP_UNKNOWN_ERROR;

}