


#define OPENSSL_SUPPRESS_DEPRECATED

#include "internal/e_os.h"
#include "eng_local.h"
#include <openssl/evp.h>
#include "crypto/asn1.h"




static ENGINE_TABLE *pkey_asn1_meth_table = NULL;

void ENGINE_unregister_pkey_asn1_meths(ENGINE *e)
{
    engine_table_unregister(&pkey_asn1_meth_table, e);
}

static void engine_unregister_all_pkey_asn1_meths(void)
{
    engine_table_cleanup(&pkey_asn1_meth_table);
}

int ENGINE_register_pkey_asn1_meths(ENGINE *e)
{
    if (e->pkey_asn1_meths) {
        const int *nids;
        int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0);
        if (num_nids > 0)
            return engine_table_register(&pkey_asn1_meth_table,
                                         engine_unregister_all_pkey_asn1_meths,
                                         e, nids, num_nids, 0);
    }
    return 1;
}

void ENGINE_register_all_pkey_asn1_meths(void)
{
    ENGINE *e;

    for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
        ENGINE_register_pkey_asn1_meths(e);
}

int ENGINE_set_default_pkey_asn1_meths(ENGINE *e)
{
    if (e->pkey_asn1_meths) {
        const int *nids;
        int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0);
        if (num_nids > 0)
            return engine_table_register(&pkey_asn1_meth_table,
                                         engine_unregister_all_pkey_asn1_meths,
                                         e, nids, num_nids, 1);
    }
    return 1;
}


ENGINE *ENGINE_get_pkey_asn1_meth_engine(int nid)
{
    return ossl_engine_table_select(&pkey_asn1_meth_table, nid,
                                    OPENSSL_FILE, OPENSSL_LINE);
}


const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid)
{
    EVP_PKEY_ASN1_METHOD *ret;
    ENGINE_PKEY_ASN1_METHS_PTR fn = ENGINE_get_pkey_asn1_meths(e);
    if (!fn || !fn(e, &ret, NULL, nid)) {
        ERR_raise(ERR_LIB_ENGINE, ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD);
        return NULL;
    }
    return ret;
}


ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const ENGINE *e)
{
    return e->pkey_asn1_meths;
}


int ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f)
{
    e->pkey_asn1_meths = f;
    return 1;
}



void engine_pkey_asn1_meths_free(ENGINE *e)
{
    int i;
    EVP_PKEY_ASN1_METHOD *pkm;
    if (e->pkey_asn1_meths) {
        const int *pknids;
        int npknids;
        npknids = e->pkey_asn1_meths(e, NULL, &pknids, 0);
        for (i = 0; i < npknids; i++) {
            if (e->pkey_asn1_meths(e, &pkm, NULL, pknids[i])) {
                EVP_PKEY_asn1_free(pkm);
            }
        }
    }
}



const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth_str(ENGINE *e,
                                                          const char *str,
                                                          int len)
{
    int i, nidcount;
    const int *nids;
    EVP_PKEY_ASN1_METHOD *ameth;
    if (!e->pkey_asn1_meths)
        return NULL;
    if (len == -1)
        len = strlen(str);
    nidcount = e->pkey_asn1_meths(e, NULL, &nids, 0);
    for (i = 0; i < nidcount; i++) {
        e->pkey_asn1_meths(e, &ameth, NULL, nids[i]);
        if (ameth != NULL
            && ((int)strlen(ameth->pem_str) == len)
            && OPENSSL_strncasecmp(ameth->pem_str, str, len) == 0)
            return ameth;
    }
    return NULL;
}

typedef struct {
    ENGINE *e;
    const EVP_PKEY_ASN1_METHOD *ameth;
    const char *str;
    int len;
} ENGINE_FIND_STR;

static void look_str_cb(int nid, STACK_OF(ENGINE) *sk, ENGINE *def, void *arg)
{
    ENGINE_FIND_STR *lk = arg;
    int i;
    if (lk->ameth)
        return;
    for (i = 0; i < sk_ENGINE_num(sk); i++) {
        ENGINE *e = sk_ENGINE_value(sk, i);
        EVP_PKEY_ASN1_METHOD *ameth;
        e->pkey_asn1_meths(e, &ameth, NULL, nid);
        if (ameth != NULL
                && ((int)strlen(ameth->pem_str) == lk->len)
                && OPENSSL_strncasecmp(ameth->pem_str, lk->str, lk->len) == 0) {
            lk->e = e;
            lk->ameth = ameth;
            return;
        }
    }
}

const EVP_PKEY_ASN1_METHOD *ENGINE_pkey_asn1_find_str(ENGINE **pe,
                                                      const char *str,
                                                      int len)
{
    ENGINE_FIND_STR fstr;
    fstr.e = NULL;
    fstr.ameth = NULL;
    fstr.str = str;
    fstr.len = len;

    if (!RUN_ONCE(&engine_lock_init, do_engine_lock_init)) {
        
        ERR_raise(ERR_LIB_ENGINE, ERR_R_CRYPTO_LIB);
        return NULL;
    }

    if (!CRYPTO_THREAD_read_lock(global_engine_lock))
        return NULL;
    engine_table_doall(pkey_asn1_meth_table, look_str_cb, &fstr);
    
    if (fstr.e != NULL) {
        int ref;

        if (!CRYPTO_UP_REF(&fstr.e->struct_ref, &ref)) {
            CRYPTO_THREAD_unlock(global_engine_lock);
            ERR_raise(ERR_LIB_ENGINE, ERR_R_CRYPTO_LIB);
            return NULL;
        }
        ENGINE_REF_PRINT(fstr.e, 0, 1);
    }
    *pe = fstr.e;
    CRYPTO_THREAD_unlock(global_engine_lock);
    return fstr.ameth;
}
