/* $OpenBSD: t_x509.c,v 1.54 2025/07/01 06:46:39 tb Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

#include <openssl/opensslconf.h>

#include <openssl/asn1.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/sha.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>

#include "err_local.h"
#include "evp_local.h"
#include "x509_local.h"

int
X509_print_fp(FILE *fp, X509 *x)
{
        return X509_print_ex_fp(fp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
}
LCRYPTO_ALIAS(X509_print_fp);

int
X509_print_ex_fp(FILE *fp, X509 *x, unsigned long nmflag, unsigned long cflag)
{
        BIO *b;
        int ret;

        if ((b = BIO_new(BIO_s_file())) == NULL) {
                X509error(ERR_R_BUF_LIB);
                return (0);
        }
        BIO_set_fp(b, fp, BIO_NOCLOSE);
        ret = X509_print_ex(b, x, nmflag, cflag);
        BIO_free(b);
        return (ret);
}
LCRYPTO_ALIAS(X509_print_ex_fp);

int
X509_print(BIO *bp, X509 *x)
{
        return X509_print_ex(bp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
}
LCRYPTO_ALIAS(X509_print);

static int
x509_print_uids(BIO *bp, const X509 *x, int indent)
{
        const ASN1_BIT_STRING *issuerUID = NULL, *subjectUID = NULL;

        X509_get0_uids(x, &issuerUID, &subjectUID);
        if (issuerUID != NULL) {
                if (BIO_printf(bp, "%*sIssuer Unique ID: ", indent, "") <= 0)
                        return 0;
                if (!X509_signature_dump(bp, issuerUID, indent + 4))
                        return 0;
        }
        if (subjectUID != NULL) {
                if (BIO_printf(bp, "%*sSubject Unique ID: ", indent, "") <= 0)
                        return 0;
                if (!X509_signature_dump(bp, subjectUID, indent + 4))
                        return 0;
        }

        return 1;
}

int
X509_print_ex(BIO *bp, X509 *x, unsigned long nmflags, unsigned long cflag)
{
        long l;
        int ret = 0, i;
        char *m = NULL, mlch = ' ';
        int nmindent = 0;
        X509_CINF *ci;
        ASN1_INTEGER *bs;
        EVP_PKEY *pkey = NULL;

        if ((nmflags & XN_FLAG_SEP_MASK) == XN_FLAG_SEP_MULTILINE) {
                mlch = '\n';
                nmindent = 12;
        }

        if (nmflags == X509_FLAG_COMPAT)
                nmindent = 16;

        ci = x->cert_info;
        if (!(cflag & X509_FLAG_NO_HEADER)) {
                if (BIO_printf(bp, "Certificate:\n") <= 0)
                        goto err;
                if (BIO_printf(bp, "    Data:\n") <= 0)
                        goto err;
        }
        if (!(cflag & X509_FLAG_NO_VERSION)) {
                l = X509_get_version(x);
                if (l >= 0 && l <= 2) {
                        if (BIO_printf(bp, "%8sVersion: %ld (0x%lx)\n",
                            "", l + 1, l) <= 0)
                                goto err;
                } else {
                        if (BIO_printf(bp, "%8sVersion: unknown (%ld)\n",
                            "", l) <= 0)
                                goto err;
                }
        }
        if (!(cflag & X509_FLAG_NO_SERIAL)) {
                if (BIO_printf(bp, "        Serial Number:") <= 0)
                        goto err;

                bs = X509_get_serialNumber(x);
                l = -1;

                /*
                 * For historical reasons, non-negative serial numbers are
                 * printed in decimal as long as they fit into a long. Using
                 * ASN1_INTEGER_get_uint64() avoids an error on the stack for
                 * numbers between LONG_MAX and ULONG_MAX. Otherwise fall back
                 * to hexadecimal, also for numbers that are non-conformant
                 * (negative or larger than 2^159 - 1).
                 */
                if (bs->length <= sizeof(long) && bs->type == V_ASN1_INTEGER) {
                        uint64_t u64;

                        if (ASN1_INTEGER_get_uint64(&u64, bs) && u64 <= LONG_MAX)
                                l = (long)u64;
                }
                if (l >= 0) {
                        if (BIO_printf(bp, " %ld (0x%lx)\n", l, l) <= 0)
                                goto err;
                } else {
                        const char *neg = "";

                        if (bs->type == V_ASN1_NEG_INTEGER)
                                neg = " (Negative)";

                        if (BIO_printf(bp, "\n%12s%s", "", neg) <= 0)
                                goto err;
                        for (i = 0; i < bs->length; i++) {
                                if (BIO_printf(bp, "%02x%c", bs->data[i],
                                    ((i + 1 == bs->length) ? '\n' : ':')) <= 0)
                                        goto err;
                        }
                }

        }

        if (!(cflag & X509_FLAG_NO_SIGNAME)) {
                if (X509_signature_print(bp, x->sig_alg, NULL) <= 0)
                        goto err;
        }

        if (!(cflag & X509_FLAG_NO_ISSUER)) {
                if (BIO_printf(bp, "        Issuer:%c", mlch) <= 0)
                        goto err;
                if (X509_NAME_print_ex(bp, X509_get_issuer_name(x),
                    nmindent, nmflags) < (nmflags == X509_FLAG_COMPAT ? 1 : 0))
                        goto err;
                if (BIO_printf(bp, "\n") <= 0)
                        goto err;
        }
        if (!(cflag & X509_FLAG_NO_VALIDITY)) {
                if (BIO_printf(bp, "        Validity\n") <= 0)
                        goto err;
                if (BIO_printf(bp, "            Not Before: ") <= 0)
                        goto err;
                if (!ASN1_TIME_print(bp, X509_get_notBefore(x)))
                        goto err;
                if (BIO_printf(bp, "\n            Not After : ") <= 0)
                        goto err;
                if (!ASN1_TIME_print(bp, X509_get_notAfter(x)))
                        goto err;
                if (BIO_printf(bp, "\n") <= 0)
                        goto err;
        }
        if (!(cflag & X509_FLAG_NO_SUBJECT)) {
                if (BIO_printf(bp, "        Subject:%c", mlch) <= 0)
                        goto err;
                if (X509_NAME_print_ex(bp, X509_get_subject_name(x),
                    nmindent, nmflags) < (nmflags == X509_FLAG_COMPAT ? 1 : 0))
                        goto err;
                if (BIO_printf(bp, "\n") <= 0)
                        goto err;
        }
        if (!(cflag & X509_FLAG_NO_PUBKEY)) {
                if (BIO_printf(bp, "        Subject Public Key Info:\n") <= 0)
                        goto err;
                if (BIO_printf(bp, "%12sPublic Key Algorithm: ", "") <= 0)
                        goto err;
                if (i2a_ASN1_OBJECT(bp, ci->key->algor->algorithm) <= 0)
                        goto err;
                if (BIO_puts(bp, "\n") <= 0)
                        goto err;

                pkey = X509_get_pubkey(x);
                if (pkey == NULL) {
                        BIO_printf(bp, "%12sUnable to load Public Key\n", "");
                        ERR_print_errors(bp);
                } else {
                        EVP_PKEY_print_public(bp, pkey, 16, NULL);
                        EVP_PKEY_free(pkey);
                }
        }

        if (!(cflag & X509_FLAG_NO_IDS)) {
                if (!x509_print_uids(bp, x, 8))
                        goto err;
        }

        if (!(cflag & X509_FLAG_NO_EXTENSIONS))
                X509V3_extensions_print(bp, "X509v3 extensions",
                    ci->extensions, cflag, 8);

        if (!(cflag & X509_FLAG_NO_SIGDUMP)) {
                if (X509_signature_print(bp, x->sig_alg, x->signature) <= 0)
                        goto err;
        }
        if (!(cflag & X509_FLAG_NO_AUX)) {
                if (!X509_CERT_AUX_print(bp, x->aux, 0))
                        goto err;
        }
        ret = 1;

 err:
        free(m);
        return (ret);
}
LCRYPTO_ALIAS(X509_print_ex);

int
X509_ocspid_print(BIO *bp, X509 *x)
{
        unsigned char *der = NULL;
        unsigned char *dertmp;
        int derlen;
        int i;
        unsigned char SHA1md[SHA_DIGEST_LENGTH];

        /* display the hash of the subject as it would appear
           in OCSP requests */
        if (BIO_printf(bp, "        Subject OCSP hash: ") <= 0)
                goto err;
        if ((derlen = i2d_X509_NAME(x->cert_info->subject, NULL)) <= 0)
                goto err;
        if ((der = dertmp = malloc(derlen)) == NULL)
                goto err;
        if (i2d_X509_NAME(x->cert_info->subject, &dertmp) <= 0)
                goto err;

        if (!EVP_Digest(der, derlen, SHA1md, NULL, EVP_sha1(), NULL))
                goto err;
        for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
                if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
                        goto err;
        }
        free (der);
        der = NULL;

        /* display the hash of the public key as it would appear
           in OCSP requests */
        if (BIO_printf(bp, "\n        Public key OCSP hash: ") <= 0)
                goto err;

        if (!EVP_Digest(x->cert_info->key->public_key->data,
            x->cert_info->key->public_key->length,
            SHA1md, NULL, EVP_sha1(), NULL))
                goto err;
        for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
                if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
                        goto err;
        }
        BIO_printf(bp, "\n");

        return (1);

 err:
        free(der);
        return (0);
}
LCRYPTO_ALIAS(X509_ocspid_print);

int
X509_signature_dump(BIO *bp, const ASN1_STRING *sig, int indent)
{
        const unsigned char *s;
        int i, n;

        n = sig->length;
        s = sig->data;
        for (i = 0; i < n; i++) {
                if ((i % 18) == 0) {
                        if (BIO_printf(bp, "\n") <= 0)
                                return 0;
                        if (BIO_indent(bp, indent, indent) <= 0)
                                return 0;
                }
                if (BIO_printf(bp, "%02x%s", s[i],
                    ((i + 1) == n) ? "" : ":") <= 0)
                        return 0;
        }
        if (BIO_printf(bp, "\n") != 1)
                return 0;

        return 1;
}
LCRYPTO_ALIAS(X509_signature_dump);

int
X509_signature_print(BIO *bp, const X509_ALGOR *sigalg, const ASN1_STRING *sig)
{
        int sig_nid;
        if (BIO_puts(bp, "    Signature Algorithm: ") <= 0)
                return 0;
        if (i2a_ASN1_OBJECT(bp, sigalg->algorithm) <= 0)
                return 0;

        sig_nid = OBJ_obj2nid(sigalg->algorithm);
        if (sig_nid != NID_undef) {
                int pkey_nid, dig_nid;
                const EVP_PKEY_ASN1_METHOD *ameth;
                if (OBJ_find_sigid_algs(sig_nid, &dig_nid, &pkey_nid)) {
                        ameth = EVP_PKEY_asn1_find(NULL, pkey_nid);
                        if (ameth && ameth->sig_print)
                                return ameth->sig_print(bp, sigalg, sig, 9, 0);
                }
        }
        if (sig)
                return X509_signature_dump(bp, sig, 9);
        else if (BIO_puts(bp, "\n") <= 0)
                return 0;
        return 1;
}
LCRYPTO_ALIAS(X509_signature_print);

int
ASN1_TIME_print(BIO *bp, const ASN1_TIME *tm)
{
        if (tm->type == V_ASN1_UTCTIME)
                return ASN1_UTCTIME_print(bp, tm);
        if (tm->type == V_ASN1_GENERALIZEDTIME)
                return ASN1_GENERALIZEDTIME_print(bp, tm);
        BIO_printf(bp, "Bad time value");
        return (0);
}
LCRYPTO_ALIAS(ASN1_TIME_print);

static const char *mon[12] = {
        "Jan", "Feb", "Mar", "Apr", "May", "Jun",
        "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};

int
ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
{
        char *v;
        int gmt = 0;
        int i;
        int y = 0, M = 0, d = 0, h = 0, m = 0, s = 0;
        char *f = "";
        int f_len = 0;

        i = tm->length;
        v = (char *)tm->data;

        if (i < 12)
                goto err;
        if (v[i-1] == 'Z')
                gmt = 1;
        for (i = 0; i < 12; i++)
                if ((v[i] > '9') || (v[i] < '0'))
                        goto err;
        y = (v[0] - '0') * 1000 + (v[1] - '0') * 100 +
            (v[2] - '0') * 10 + (v[3] - '0');
        M = (v[4] - '0') * 10 + (v[5] - '0');
        if ((M > 12) || (M < 1))
                goto err;
        d = (v[6] - '0') * 10 + (v[7] - '0');
        h = (v[8] - '0') * 10 + (v[9] - '0');
        m = (v[10] - '0') * 10 + (v[11] - '0');
        if (tm->length >= 14 &&
            (v[12] >= '0') && (v[12] <= '9') &&
            (v[13] >= '0') && (v[13] <= '9')) {
                s =  (v[12] - '0') * 10 + (v[13] - '0');
                /* Check for fractions of seconds. */
                if (tm->length >= 15 && v[14] == '.') {
                        int l = tm->length;
                        f = &v[14];     /* The decimal point. */
                        f_len = 1;
                        while (14 + f_len < l && f[f_len] >= '0' &&
                            f[f_len] <= '9')
                                ++f_len;
                }
        }

        if (BIO_printf(bp, "%s %2d %02d:%02d:%02d%.*s %d%s",
            mon[M - 1], d, h, m, s, f_len, f, y, (gmt) ? " GMT" : "") <= 0)
                return (0);
        else
                return (1);

 err:
        BIO_printf(bp, "Bad time value");
        return (0);
}
LCRYPTO_ALIAS(ASN1_GENERALIZEDTIME_print);

int
ASN1_UTCTIME_print(BIO *bp, const ASN1_UTCTIME *tm)
{
        const char *v;
        int gmt = 0;
        int i;
        int y = 0, M = 0, d = 0, h = 0, m = 0, s = 0;

        i = tm->length;
        v = (const char *)tm->data;

        if (i < 10)
                goto err;
        if (v[i-1] == 'Z')
                gmt = 1;
        for (i = 0; i < 10; i++)
                if ((v[i] > '9') || (v[i] < '0'))
                        goto err;
        y = (v[0] - '0') * 10 + (v[1] - '0');
        if (y < 50)
                y += 100;
        M = (v[2] - '0') * 10 + (v[3] - '0');
        if ((M > 12) || (M < 1))
                goto err;
        d = (v[4] - '0') * 10 + (v[5] - '0');
        h = (v[6] - '0') * 10 + (v[7] - '0');
        m = (v[8] - '0') * 10 + (v[9] - '0');
        if (tm->length >=12 &&
            (v[10] >= '0') && (v[10] <= '9') &&
            (v[11] >= '0') && (v[11] <= '9'))
                s = (v[10] - '0') * 10 + (v[11] - '0');

        if (BIO_printf(bp, "%s %2d %02d:%02d:%02d %d%s",
            mon[M - 1], d, h, m, s, y + 1900, (gmt) ? " GMT" : "") <= 0)
                return (0);
        else
                return (1);

 err:
        BIO_printf(bp, "Bad time value");
        return (0);
}
LCRYPTO_ALIAS(ASN1_UTCTIME_print);