diff options
Diffstat (limited to 'crypto/rsa/rsa_ssl.c')
| -rw-r--r-- | crypto/rsa/rsa_ssl.c | 91 |
1 files changed, 25 insertions, 66 deletions
diff --git a/crypto/rsa/rsa_ssl.c b/crypto/rsa/rsa_ssl.c index 746e01f64a9d..286d0a42de0f 100644 --- a/crypto/rsa/rsa_ssl.c +++ b/crypto/rsa/rsa_ssl.c @@ -1,63 +1,14 @@ -/* crypto/rsa/rsa_ssl.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2018 The OpenSSL Project Authors. 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.] + * 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 <stdio.h> -#include "cryptlib.h" +#include "internal/cryptlib.h" #include <openssl/bn.h> #include <openssl/rsa.h> #include <openssl/rand.h> @@ -71,7 +22,7 @@ int RSA_padding_add_SSLv23(unsigned char *to, int tlen, if (flen > (tlen - 11)) { RSAerr(RSA_F_RSA_PADDING_ADD_SSLV23, RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE); - return (0); + return 0; } p = (unsigned char *)to; @@ -83,12 +34,12 @@ int RSA_padding_add_SSLv23(unsigned char *to, int tlen, j = tlen - 3 - 8 - flen; if (RAND_bytes(p, j) <= 0) - return (0); + return 0; for (i = 0; i < j; i++) { if (*p == '\0') do { if (RAND_bytes(p, 1) <= 0) - return (0); + return 0; } while (*p == '\0'); p++; } @@ -98,7 +49,7 @@ int RSA_padding_add_SSLv23(unsigned char *to, int tlen, *(p++) = '\0'; memcpy(p, from, (unsigned int)flen); - return (1); + return 1; } int RSA_padding_check_SSLv23(unsigned char *to, int tlen, @@ -110,11 +61,19 @@ int RSA_padding_check_SSLv23(unsigned char *to, int tlen, p = from; if (flen < 10) { RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23, RSA_R_DATA_TOO_SMALL); - return (-1); + return -1; + } + /* Accept even zero-padded input */ + if (flen == num) { + if (*(p++) != 0) { + RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23, RSA_R_BLOCK_TYPE_IS_NOT_02); + return -1; + } + flen--; } if ((num != (flen + 1)) || (*(p++) != 02)) { RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23, RSA_R_BLOCK_TYPE_IS_NOT_02); - return (-1); + return -1; } /* scan over padding data */ @@ -126,7 +85,7 @@ int RSA_padding_check_SSLv23(unsigned char *to, int tlen, if ((i == j) || (i < 8)) { RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23, RSA_R_NULL_BEFORE_BLOCK_MISSING); - return (-1); + return -1; } for (k = -9; k < -1; k++) { if (p[k] != 0x03) @@ -134,16 +93,16 @@ int RSA_padding_check_SSLv23(unsigned char *to, int tlen, } if (k == -1) { RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23, RSA_R_SSLV3_ROLLBACK_ATTACK); - return (-1); + return -1; } i++; /* Skip over the '\0' */ j -= i; if (j > tlen) { RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23, RSA_R_DATA_TOO_LARGE); - return (-1); + return -1; } memcpy(to, p, (unsigned int)j); - return (j); + return j; } |