/*

 * Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (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

 */

#include <openssl/opensslconf.h>

#include "apps.h"

#include "progs.h"

#include <openssl/err.h>

#include <openssl/pem.h>

#include <openssl/store.h>

#include <openssl/x509v3.h>      /* s2i_ASN1_INTEGER */

static int process(const char *uri, const UI_METHOD *uimeth, PW_CB_DATA *uidata,

                   int expected, int criterion, OSSL_STORE_SEARCH *search,

                   int text, int noout, int recursive, int indent, BIO *out,

                   const char *prog);

typedef enum OPTION_choice {

    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, OPT_ENGINE, OPT_OUT, OPT_PASSIN,

    OPT_NOOUT, OPT_TEXT, OPT_RECURSIVE,

    OPT_SEARCHFOR_CERTS, OPT_SEARCHFOR_KEYS, OPT_SEARCHFOR_CRLS,

    OPT_CRITERION_SUBJECT, OPT_CRITERION_ISSUER, OPT_CRITERION_SERIAL,

    OPT_CRITERION_FINGERPRINT, OPT_CRITERION_ALIAS,

    OPT_MD

} OPTION_CHOICE;

const OPTIONS storeutl_options[] = {

    {OPT_HELP_STR, 1, '-', "Usage: %s [options] uri\nValid options are:\n"},

    {"help", OPT_HELP, '-', "Display this summary"},

    {"out", OPT_OUT, '>', "Output file - default stdout"},

    {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},

    {"text", OPT_TEXT, '-', "Print a text form of the objects"},

    {"noout", OPT_NOOUT, '-', "No PEM output, just status"},

    {"certs", OPT_SEARCHFOR_CERTS, '-', "Search for certificates only"},

    {"keys", OPT_SEARCHFOR_KEYS, '-', "Search for keys only"},

    {"crls", OPT_SEARCHFOR_CRLS, '-', "Search for CRLs only"},

    {"subject", OPT_CRITERION_SUBJECT, 's', "Search by subject"},

    {"issuer", OPT_CRITERION_ISSUER, 's', "Search by issuer and serial, issuer name"},

    {"serial", OPT_CRITERION_SERIAL, 's', "Search by issuer and serial, serial number"},

    {"fingerprint", OPT_CRITERION_FINGERPRINT, 's', "Search by public key fingerprint, given in hex"},

    {"alias", OPT_CRITERION_ALIAS, 's', "Search by alias"},

    {"", OPT_MD, '-', "Any supported digest"},

#ifndef OPENSSL_NO_ENGINE

    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},

#endif

    {"r", OPT_RECURSIVE, '-', "Recurse through names"},

    {NULL}

};

int storeutl_main(int argc, char *argv[])

{

    int ret = 1, noout = 0, text = 0, recursive = 0;

    char *outfile = NULL, *passin = NULL, *passinarg = NULL;

    BIO *out = NULL;

    ENGINE *e = NULL;

    OPTION_CHOICE o;

    char *prog = opt_init(argc, argv, storeutl_options);

    PW_CB_DATA pw_cb_data;

    int expected = 0;

    int criterion = 0;

    X509_NAME *subject = NULL, *issuer = NULL;

    ASN1_INTEGER *serial = NULL;

    unsigned char *fingerprint = NULL;

    size_t fingerprintlen = 0;

    char *alias = NULL;

    OSSL_STORE_SEARCH *search = NULL;

    const EVP_MD *digest = NULL;

    while ((o = opt_next()) != OPT_EOF) {

        switch (o) {

        case OPT_EOF:

        case OPT_ERR:

 opthelp:

            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);

            goto end;

        case OPT_HELP:

            opt_help(storeutl_options);

            ret = 0;

            goto end;

        case OPT_OUT:

            outfile = opt_arg();

            break;

        case OPT_PASSIN:

            passinarg = opt_arg();

            break;

        case OPT_NOOUT:

            noout = 1;

            break;

        case OPT_TEXT:

            text = 1;

            break;

        case OPT_RECURSIVE:

            recursive = 1;

            break;

        case OPT_SEARCHFOR_CERTS:

        case OPT_SEARCHFOR_KEYS:

        case OPT_SEARCHFOR_CRLS:

            if (expected != 0) {

                BIO_printf(bio_err, "%s: only one search type can be given.\n",

                           prog);

                goto end;

            }

            {

                static const struct {

                    enum OPTION_choice choice;

                    int type;

                } map[] = {

                    {OPT_SEARCHFOR_CERTS, OSSL_STORE_INFO_CERT},

                    {OPT_SEARCHFOR_KEYS, OSSL_STORE_INFO_PKEY},

                    {OPT_SEARCHFOR_CRLS, OSSL_STORE_INFO_CRL},

                };

                size_t i;

                for (i = 0; i < OSSL_NELEM(map); i++) {

                    if (o == map[i].choice) {

                        expected = map[i].type;

                        break;

                    }

                }

                /*

                 * If expected wasn't set at this point, it means the map

                 * isn't synchronised with the possible options leading here.

                 */

                OPENSSL_assert(expected != 0);

            }

            break;

        case OPT_CRITERION_SUBJECT:

            if (criterion != 0) {

                BIO_printf(bio_err, "%s: criterion already given.\n",

                           prog);

                goto end;

            }

            criterion = OSSL_STORE_SEARCH_BY_NAME;

            if (subject != NULL) {

                BIO_printf(bio_err, "%s: subject already given.\n",

                           prog);

                goto end;

            }

            if ((subject = parse_name(opt_arg(), MBSTRING_UTF8, 1)) == NULL) {

                BIO_printf(bio_err, "%s: can't parse subject argument.\n",

                           prog);

                goto end;

            }

            break;

        case OPT_CRITERION_ISSUER:

            if (criterion != 0

                || (criterion == OSSL_STORE_SEARCH_BY_ISSUER_SERIAL

                    && issuer != NULL)) {

                BIO_printf(bio_err, "%s: criterion already given.\n",

                           prog);

                goto end;

            }

            criterion = OSSL_STORE_SEARCH_BY_ISSUER_SERIAL;

            if (issuer != NULL) {

                BIO_printf(bio_err, "%s: issuer already given.\n",

                           prog);

                goto end;

            }

            if ((issuer = parse_name(opt_arg(), MBSTRING_UTF8, 1)) == NULL) {

                BIO_printf(bio_err, "%s: can't parse issuer argument.\n",

                           prog);

                goto end;

            }

            break;

        case OPT_CRITERION_SERIAL:

            if (criterion != 0

                || (criterion == OSSL_STORE_SEARCH_BY_ISSUER_SERIAL

                    && serial != NULL)) {

                BIO_printf(bio_err, "%s: criterion already given.\n",

                           prog);

                goto end;

            }

            criterion = OSSL_STORE_SEARCH_BY_ISSUER_SERIAL;

            if (serial != NULL) {

                BIO_printf(bio_err, "%s: serial number already given.\n",

                           prog);

                goto end;

            }

            if ((serial = s2i_ASN1_INTEGER(NULL, opt_arg())) == NULL) {

                BIO_printf(bio_err, "%s: can't parse serial number argument.\n",

                           prog);

                goto end;

            }

            break;

        case OPT_CRITERION_FINGERPRINT:

            if (criterion != 0

                || (criterion == OSSL_STORE_SEARCH_BY_KEY_FINGERPRINT

                    && fingerprint != NULL)) {

                BIO_printf(bio_err, "%s: criterion already given.\n",

                           prog);

                goto end;

            }

            criterion = OSSL_STORE_SEARCH_BY_KEY_FINGERPRINT;

            if (fingerprint != NULL) {

                BIO_printf(bio_err, "%s: fingerprint already given.\n",

                           prog);

                goto end;

            }

            {

                long tmplen = 0;

                if ((fingerprint = OPENSSL_hexstr2buf(opt_arg(), &tmplen))

                    == NULL) {

                    BIO_printf(bio_err,

                               "%s: can't parse fingerprint argument.\n",

                               prog);

                    goto end;

                }

                fingerprintlen = (size_t)tmplen;

            }

            break;

        case OPT_CRITERION_ALIAS:

            if (criterion != 0) {

                BIO_printf(bio_err, "%s: criterion already given.\n",

                           prog);

                goto end;

            }

            criterion = OSSL_STORE_SEARCH_BY_ALIAS;

            if (alias != NULL) {

                BIO_printf(bio_err, "%s: alias already given.\n",

                           prog);

                goto end;

            }

            if ((alias = OPENSSL_strdup(opt_arg())) == NULL) {

                BIO_printf(bio_err, "%s: can't parse alias argument.\n",

                           prog);

                goto end;

            }

            break;

        case OPT_ENGINE:

            e = setup_engine(opt_arg(), 0);

            break;

        case OPT_MD:

            if (!opt_md(opt_unknown(), &digest))

                goto opthelp;

        }

    }

    argc = opt_num_rest();

    argv = opt_rest();

    if (argc == 0) {

        BIO_printf(bio_err, "%s: No URI given, nothing to do...\n", prog);

        goto opthelp;

    }

    if (argc > 1) {

        BIO_printf(bio_err, "%s: Unknown extra parameters after URI\n", prog);

        goto opthelp;

    }

    if (criterion != 0) {

        switch (criterion) {

        case OSSL_STORE_SEARCH_BY_NAME:

            if ((search = OSSL_STORE_SEARCH_by_name(subject)) == NULL) {

                ERR_print_errors(bio_err);

                goto end;

            }

            break;

        case OSSL_STORE_SEARCH_BY_ISSUER_SERIAL:

            if (issuer == NULL || serial == NULL) {

                BIO_printf(bio_err,

                           "%s: both -issuer and -serial must be given.\n",

                           prog);

                goto end;

            }

            if ((search = OSSL_STORE_SEARCH_by_issuer_serial(issuer, serial))

                == NULL) {

                ERR_print_errors(bio_err);

                goto end;

            }

            break;

        case OSSL_STORE_SEARCH_BY_KEY_FINGERPRINT:

            if ((search = OSSL_STORE_SEARCH_by_key_fingerprint(digest,

                                                               fingerprint,

                                                               fingerprintlen))

                == NULL) {

                ERR_print_errors(bio_err);

                goto end;

            }

            break;

        case OSSL_STORE_SEARCH_BY_ALIAS:

            if ((search = OSSL_STORE_SEARCH_by_alias(alias)) == NULL) {

                ERR_print_errors(bio_err);

                goto end;

            }

            break;

        }

    }

    if (!app_passwd(passinarg, NULL, &passin, NULL)) {

        BIO_printf(bio_err, "Error getting passwords\n");

        goto end;

    }

    pw_cb_data.password = passin;

    pw_cb_data.prompt_info = argv[0];

    out = bio_open_default(outfile, 'w', FORMAT_TEXT);

    if (out == NULL)

        goto end;

    ret = process(argv[0], get_ui_method(), &pw_cb_data,

                  expected, criterion, search,

                  text, noout, recursive, 0, out, prog);

 end:

    OPENSSL_free(fingerprint);

    OPENSSL_free(alias);

    ASN1_INTEGER_free(serial);

    X509_NAME_free(subject);

    X509_NAME_free(issuer);

    OSSL_STORE_SEARCH_free(search);

    BIO_free_all(out);

    OPENSSL_free(passin);

    release_engine(e);

    return ret;

}

static int indent_printf(int indent, BIO *bio, const char *format, ...)

{

    va_list args;

    int ret;

    va_start(args, format);

    ret = BIO_printf(bio, "%*s", indent, "") + BIO_vprintf(bio, format, args);

    va_end(args);

    return ret;

}

static int process(const char *uri, const UI_METHOD *uimeth, PW_CB_DATA *uidata,

                   int expected, int criterion, OSSL_STORE_SEARCH *search,

                   int text, int noout, int recursive, int indent, BIO *out,

                   const char *prog)

{

    OSSL_STORE_CTX *store_ctx = NULL;

    int ret = 1, items = 0;

    if ((store_ctx = OSSL_STORE_open(uri, uimeth, uidata, NULL, NULL))

        == NULL) {

        BIO_printf(bio_err, "Couldn't open file or uri %s\n", uri);

        ERR_print_errors(bio_err);

        return ret;

    }

    if (expected != 0) {

        if (!OSSL_STORE_expect(store_ctx, expected)) {

            ERR_print_errors(bio_err);

            goto end2;

        }

    }

    if (criterion != 0) {

        if (!OSSL_STORE_supports_search(store_ctx, criterion)) {

            BIO_printf(bio_err,

                       "%s: the store scheme doesn't support the given search criteria.\n",

                       prog);

            goto end2;

        }

        if (!OSSL_STORE_find(store_ctx, search)) {

            ERR_print_errors(bio_err);

            goto end2;

        }

    }

    /* From here on, we count errors, and we'll return the count at the end */

    ret = 0;

    for (;;) {

        OSSL_STORE_INFO *info = OSSL_STORE_load(store_ctx);

        int type = info == NULL ? 0 : OSSL_STORE_INFO_get_type(info);

        const char *infostr =

            info == NULL ? NULL : OSSL_STORE_INFO_type_string(type);

        if (info == NULL) {

            if (OSSL_STORE_eof(store_ctx))

                break;

            if (OSSL_STORE_error(store_ctx)) {

                if (recursive)

                    ERR_clear_error();

                else

                    ERR_print_errors(bio_err);

                ret++;

                continue;

            }

            BIO_printf(bio_err,

                       "ERROR: OSSL_STORE_load() returned NULL without "

                       "eof or error indications\n");

            BIO_printf(bio_err, "       This is an error in the loader\n");

            ERR_print_errors(bio_err);

            ret++;

            break;

        }

        if (type == OSSL_STORE_INFO_NAME) {

            const char *name = OSSL_STORE_INFO_get0_NAME(info);

            const char *desc = OSSL_STORE_INFO_get0_NAME_description(info);

            indent_printf(indent, bio_out, "%d: %s: %s\n", items, infostr,

                          name);

            if (desc != NULL)

                indent_printf(indent, bio_out, "%s\n", desc);

        } else {

            indent_printf(indent, bio_out, "%d: %s\n", items, infostr);

        }

        /*

         * Unfortunately, PEM_X509_INFO_write_bio() is sorely lacking in

         * functionality, so we must figure out how exactly to write things

         * ourselves...

         */

        switch (type) {

        case OSSL_STORE_INFO_NAME:

            if (recursive) {

                const char *suburi = OSSL_STORE_INFO_get0_NAME(info);

                ret += process(suburi, uimeth, uidata,

                               expected, criterion, search,

                               text, noout, recursive, indent + 2, out, prog);

            }

            break;

        case OSSL_STORE_INFO_PARAMS:

            if (text)

                EVP_PKEY_print_params(out, OSSL_STORE_INFO_get0_PARAMS(info),

                                      0, NULL);

            if (!noout)

                PEM_write_bio_Parameters(out,

                                         OSSL_STORE_INFO_get0_PARAMS(info));

            break;

        case OSSL_STORE_INFO_PKEY:

            if (text)

                EVP_PKEY_print_private(out, OSSL_STORE_INFO_get0_PKEY(info),

                                       0, NULL);

            if (!noout)

                PEM_write_bio_PrivateKey(out, OSSL_STORE_INFO_get0_PKEY(info),

                                         NULL, NULL, 0, NULL, NULL);

            break;

        case OSSL_STORE_INFO_CERT:

            if (text)

                X509_print(out, OSSL_STORE_INFO_get0_CERT(info));

            if (!noout)

                PEM_write_bio_X509(out, OSSL_STORE_INFO_get0_CERT(info));

            break;

        case OSSL_STORE_INFO_CRL:

            if (text)

                X509_CRL_print(out, OSSL_STORE_INFO_get0_CRL(info));

            if (!noout)

                PEM_write_bio_X509_CRL(out, OSSL_STORE_INFO_get0_CRL(info));

            break;

        default:

            BIO_printf(bio_err, "!!! Unknown code\n");

            ret++;

            break;

        }

        items++;

        OSSL_STORE_INFO_free(info);

    }

    indent_printf(indent, out, "Total found: %d\n", items);

 end2:

    if (!OSSL_STORE_close(store_ctx)) {

        ERR_print_errors(bio_err);

        ret++;

    }

    return ret;

}