From 8c14f7a5937f05238e0e16da6ceccad8a86458ad Mon Sep 17 00:00:00 2001 From: Samuel Pitoiset Date: Tue, 3 Jul 2012 15:53:16 +0200 Subject: Add XTEA encryption support in libavutil MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Martin Storsjö --- libavutil/xtea.h | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 libavutil/xtea.h (limited to 'libavutil/xtea.h') diff --git a/libavutil/xtea.h b/libavutil/xtea.h new file mode 100644 index 0000000000..cf305c6632 --- /dev/null +++ b/libavutil/xtea.h @@ -0,0 +1,61 @@ +/* + * A 32-bit implementation of the XTEA algorithm + * + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVUTIL_XTEA_H +#define AVUTIL_XTEA_H + +#include + +/** + * @defgroup lavu_xtea XTEA + * @ingroup lavu_crypto + * @{ + */ + +typedef struct AVXTEA { + uint32_t key[16]; +} AVXTEA; + +/** + * Initialize an AVXTEA context. + * + * @param x an AVXTEA context + * @param key a key of 16 bytes used for encryption/decryption + */ +void av_xtea_init(struct AVXTEA *ctx, const uint8_t key[16]); + +/** + * Encrypt or decrypt a buffer using a previously initialized context. + * + * @param x an AVXTEA context + * @param dst destination array, can be equal to src + * @param src source array, can be equal to dst + * @param count number of 8 byte blocks + * @param iv initialization vector for CBC mode, if NULL then ECB will be used + * @param decrypt 0 for encryption, 1 for decryption + */ +void av_xtea_crypt(struct AVXTEA *ctx, uint8_t *dst, const uint8_t *src, + int count, uint8_t *iv, int decrypt); + +/** + * @} + */ + +#endif /* AVUTIL_XTEA_H */ -- cgit v1.2.3