Coverage Report

Created: 2023-06-29 07:25

/src/boringssl/crypto/x509/a_sign.c
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Source (jump to first uncovered line)
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
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 *
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 * This package is an SSL implementation written
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 * by Eric Young (eay@cryptsoft.com).
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 * The implementation was written so as to conform with Netscapes SSL.
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 *
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 * This library is free for commercial and non-commercial use as long as
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 * the following conditions are aheared to.  The following conditions
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 * apply to all code found in this distribution, be it the RC4, RSA,
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 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
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 * included with this distribution is covered by the same copyright terms
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 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
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 *
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 * Copyright remains Eric Young's, and as such any Copyright notices in
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 * the code are not to be removed.
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 * If this package is used in a product, Eric Young should be given attribution
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 * as the author of the parts of the library used.
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 * This can be in the form of a textual message at program startup or
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 * in documentation (online or textual) provided with the package.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *    "This product includes cryptographic software written by
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 *     Eric Young (eay@cryptsoft.com)"
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 *    The word 'cryptographic' can be left out if the rouines from the library
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 *    being used are not cryptographic related :-).
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 * 4. If you include any Windows specific code (or a derivative thereof) from
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 *    the apps directory (application code) you must include an acknowledgement:
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 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 * The licence and distribution terms for any publically available version or
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 * derivative of this code cannot be changed.  i.e. this code cannot simply be
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 * copied and put under another distribution licence
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 * [including the GNU Public Licence.] */
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#include <openssl/asn1.h>
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#include <openssl/digest.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/mem.h>
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#include <openssl/obj.h>
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#include <openssl/x509.h>
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#include <limits.h>
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#include "internal.h"
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int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2,
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                   ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey,
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0
                   const EVP_MD *type) {
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0
  if (signature->type != V_ASN1_BIT_STRING) {
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0
    OPENSSL_PUT_ERROR(ASN1, ASN1_R_WRONG_TYPE);
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0
    return 0;
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0
  }
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0
  EVP_MD_CTX ctx;
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0
  EVP_MD_CTX_init(&ctx);
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0
  if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey)) {
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0
    EVP_MD_CTX_cleanup(&ctx);
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0
    return 0;
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0
  }
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0
  return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx);
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0
}
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int ASN1_item_sign_ctx(const ASN1_ITEM *it, X509_ALGOR *algor1,
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                       X509_ALGOR *algor2, ASN1_BIT_STRING *signature,
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0
                       void *asn, EVP_MD_CTX *ctx) {
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0
  int ret = 0;
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0
  uint8_t *in = NULL, *out = NULL;
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0
  if (signature->type != V_ASN1_BIT_STRING) {
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0
    OPENSSL_PUT_ERROR(ASN1, ASN1_R_WRONG_TYPE);
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0
    goto err;
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0
  }
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  // Write out the requested copies of the AlgorithmIdentifier.
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0
  if (algor1 && !x509_digest_sign_algorithm(ctx, algor1)) {
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0
    goto err;
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0
  }
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0
  if (algor2 && !x509_digest_sign_algorithm(ctx, algor2)) {
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0
    goto err;
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0
  }
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0
  int in_len = ASN1_item_i2d(asn, &in, it);
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0
  if (in_len < 0) {
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0
    goto err;
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0
  }
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0
  EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx);
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0
  size_t out_len = EVP_PKEY_size(pkey);
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0
  if (out_len > INT_MAX) {
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0
    OPENSSL_PUT_ERROR(X509, ERR_R_OVERFLOW);
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0
    goto err;
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0
  }
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0
  out = OPENSSL_malloc(out_len);
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0
  if (out == NULL) {
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0
    goto err;
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0
  }
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0
  if (!EVP_DigestSign(ctx, out, &out_len, in, in_len)) {
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0
    OPENSSL_PUT_ERROR(X509, ERR_R_EVP_LIB);
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0
    goto err;
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0
  }
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  ASN1_STRING_set0(signature, out, (int)out_len);
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0
  out = NULL;
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0
  signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
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0
  signature->flags |= ASN1_STRING_FLAG_BITS_LEFT;
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0
  ret = (int)out_len;
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0
err:
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0
  EVP_MD_CTX_cleanup(ctx);
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0
  OPENSSL_free(in);
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0
  OPENSSL_free(out);
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0
  return ret;
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0
}