/* $OpenBSD: t_x509.c,v 1.40 2022/08/11 10:36:32 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 <stdio.h>

#include <openssl/opensslconf.h>

#include <openssl/bn.h>

#include <openssl/buffer.h>

#include <openssl/err.h>

#include <openssl/objects.h>

#include <openssl/x509.h>

#include <openssl/x509v3.h>

#ifndef OPENSSL_NO_DSA

#include <openssl/dsa.h>

#endif

#ifndef OPENSSL_NO_EC

#include <openssl/ec.h>

#endif

#ifndef OPENSSL_NO_RSA

#include <openssl/rsa.h>

#endif

#include "asn1_locl.h"

#include "x509_lcl.h"

int

X509_print_fp(FILE *fp, X509 *x)

{

  return X509_print_ex_fp(fp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);

}

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);

}

int

X509_print(BIO *bp, X509 *x)

{

  return X509_print_ex(bp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);

}

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_write(bp, "Certificate:\n", 13) <= 0)

      goto err;

    if (BIO_write(bp, "    Data:\n", 10) <= 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_write(bp, "        Serial Number:", 22) <= 0)

      goto err;

    bs = X509_get_serialNumber(x);

    l = -1;

    if (bs->length <= (int)sizeof(long))

      l = ASN1_INTEGER_get(bs);

    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_write(bp, "\n", 1) <= 0)

      goto err;

  }

  if (!(cflag & X509_FLAG_NO_VALIDITY)) {

    if (BIO_write(bp, "        Validity\n", 17) <= 0)

      goto err;

    if (BIO_write(bp, "            Not Before: ", 24) <= 0)

      goto err;

    if (!ASN1_TIME_print(bp, X509_get_notBefore(x)))

      goto err;

    if (BIO_write(bp, "\n            Not After : ", 25) <= 0)

      goto err;

    if (!ASN1_TIME_print(bp, X509_get_notAfter(x)))

      goto err;

    if (BIO_write(bp, "\n", 1) <= 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_write(bp, "\n", 1) <= 0)

      goto err;

  }

  if (!(cflag & X509_FLAG_NO_PUBKEY)) {

    if (BIO_write(bp, "        Subject Public Key Info:\n",

        33) <= 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_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);

}

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);

}

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_write(bp, "\n", 1) <= 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_write(bp, "\n", 1) != 1)

    return 0;

  return 1;

}

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;

}

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_write(bp, "Bad time value", 14);

  return (0);

}

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_write(bp, "Bad time value", 14);

  return (0);

}

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_write(bp, "Bad time value", 14);

  return (0);

}

int

X509_NAME_print(BIO *bp, const X509_NAME *name, int obase)

{

  char *s, *c, *b;

  int i;

  int ret = 0;

  b = X509_NAME_oneline(name, NULL, 0);

  if (b == NULL)

    return 0;

  if (*b == '\0') {

    free(b);

    return 1;

  }

  s = b + 1; /* skip the first slash */

  c = s;

  for (;;) {

    if (((*s == '/') &&

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

        ((s[2] == '=') || ((s[2] >= 'A') && (s[2] <= 'Z') &&

        (s[3] == '='))))) || (*s == '\0')) {

      i = s - c;

      if (BIO_write(bp, c, i) != i)

        goto err;

      c = s + 1;  /* skip following slash */

      if (*s != '\0') {

        if (BIO_write(bp, ", ", 2) != 2)

          goto err;

      }

    }

    if (*s == '\0')

      break;

    s++;

  }

  ret = 1;

  if (0) {

 err:

    X509error(ERR_R_BUF_LIB);

  }

  free(b);

  return (ret);

}