diff options
author | Matt Caswell <matt@openssl.org> | 2014-11-24 10:06:20 +0000 |
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committer | Matt Caswell <matt@openssl.org> | 2014-12-08 21:40:12 +0000 |
commit | 85bcf27cccd8f5f569886479ad96a0c33444404c (patch) | |
tree | 768ff7474506cc50ce217011c918be93264b71b5 /crypto/include | |
parent | dd703de02205dd9d88878cd5a48a15dbf2dd569e (diff) |
Prepare for bn opaquify. Implement internal helper functions.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Diffstat (limited to 'crypto/include')
-rw-r--r-- | crypto/include/internal/bn_int.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/crypto/include/internal/bn_int.h b/crypto/include/internal/bn_int.h new file mode 100644 index 0000000000..811990b773 --- /dev/null +++ b/crypto/include/internal/bn_int.h @@ -0,0 +1,118 @@ +/* ==================================================================== + * Copyright (c) 1998-2014 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 + * openssl-core@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). + * + */ + +#ifndef HEADER_BN_INT_H +#define HEADER_BN_INT_H + + +#include <openssl/bn.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/* Determine the modified width-(w+1) Non-Adjacent Form (wNAF) of 'scalar'. + * This is an array r[] of values that are either zero or odd with an + * absolute value less than 2^w satisfying + * scalar = \sum_j r[j]*2^j + * where at most one of any w+1 consecutive digits is non-zero + * with the exception that the most significant digit may be only + * w-1 zeros away from that next non-zero digit. + */ +signed char *bn_compute_wNAF(const BIGNUM *scalar, int w, size_t *ret_len); + +int bn_get_top(const BIGNUM *a); + +void bn_set_top(BIGNUM *a, int top); + +int bn_get_dmax(const BIGNUM *a); + +/* Set all words to zero */ +void bn_set_all_zero(BIGNUM *a); + +/* + * Copy the internal BIGNUM words into out which holds size elements (and size + * must be bigger than top) + */ +int bn_copy_words(BN_ULONG *out, const BIGNUM *in, int size); + +BN_ULONG *bn_get_words(const BIGNUM *a); + +/* + * Set the internal data words in a to point to words which contains size + * elements. The BN_FLG_STATIC_DATA flag is set + */ +void bn_set_static_words(BIGNUM *a, BN_ULONG *words, int size); + +/* + * Copy data into the BIGNUM. The caller must check that dmax is sufficient to + * hold the data + */ +void bn_set_data(BIGNUM *a, const void *data, size_t size); + +size_t bn_sizeof_BIGNUM(void); + +/* + * Return element el from an array of BIGNUMs starting at base (required + * because callers do not know the size of BIGNUM at compilation time) + */ +BIGNUM *bn_array_el(BIGNUM *base, int el); + + +#ifdef __cplusplus +} +#endif + +#endif + |