diff options
Diffstat (limited to 'crypto/openssl/crypto/rsa/rsa_x931.c')
| -rw-r--r-- | crypto/openssl/crypto/rsa/rsa_x931.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/crypto/openssl/crypto/rsa/rsa_x931.c b/crypto/openssl/crypto/rsa/rsa_x931.c new file mode 100644 index 000000000000..e91865417626 --- /dev/null +++ b/crypto/openssl/crypto/rsa/rsa_x931.c @@ -0,0 +1,177 @@ +/* rsa_x931.c */ +/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL + * project 2005. + */ +/* ==================================================================== + * Copyright (c) 2005 The OpenSSL Project. All rights reserved. + * + * 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 above 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 acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include <stdio.h> +#include "cryptlib.h" +#include <openssl/bn.h> +#include <openssl/rsa.h> +#include <openssl/rand.h> +#include <openssl/objects.h> + +int RSA_padding_add_X931(unsigned char *to, int tlen, + const unsigned char *from, int flen) + { + int j; + unsigned char *p; + + /* Absolute minimum amount of padding is 1 header nibble, 1 padding + * nibble and 2 trailer bytes: but 1 hash if is already in 'from'. + */ + + j = tlen - flen - 2; + + if (j < 0) + { + RSAerr(RSA_F_RSA_PADDING_ADD_X931,RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE); + return -1; + } + + p=(unsigned char *)to; + + /* If no padding start and end nibbles are in one byte */ + if (j == 0) + *p++ = 0x6A; + else + { + *p++ = 0x6B; + if (j > 1) + { + memset(p, 0xBB, j - 1); + p += j - 1; + } + *p++ = 0xBA; + } + memcpy(p,from,(unsigned int)flen); + p += flen; + *p = 0xCC; + return(1); + } + +int RSA_padding_check_X931(unsigned char *to, int tlen, + const unsigned char *from, int flen, int num) + { + int i = 0,j; + const unsigned char *p; + + p=from; + if ((num != flen) || ((*p != 0x6A) && (*p != 0x6B))) + { + RSAerr(RSA_F_RSA_PADDING_CHECK_X931,RSA_R_INVALID_HEADER); + return -1; + } + + if (*p++ == 0x6B) + { + j=flen-3; + for (i = 0; i < j; i++) + { + unsigned char c = *p++; + if (c == 0xBA) + break; + if (c != 0xBB) + { + RSAerr(RSA_F_RSA_PADDING_CHECK_X931, + RSA_R_INVALID_PADDING); + return -1; + } + } + + j -= i; + + if (i == 0) + { + RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING); + return -1; + } + + } + else j = flen - 2; + + if (p[j] != 0xCC) + { + RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER); + return -1; + } + + memcpy(to,p,(unsigned int)j); + + return(j); + } + +/* Translate between X931 hash ids and NIDs */ + +int RSA_X931_hash_id(int nid) + { + switch (nid) + { + case NID_sha1: + return 0x33; + + case NID_sha256: + return 0x34; + + case NID_sha384: + return 0x36; + + case NID_sha512: + return 0x35; + + } + return -1; + } + |