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rtmp: Move RTMP digest calculation to a separate file

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The rtmpcrypt protocol requires it.
This commit is contained in:
Diego Biurrun 2017-03-14 16:38:38 +01:00
parent cfee5e1a0f
commit b864230c49
3 changed files with 74 additions and 43 deletions
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14
libavformat/Makefile
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@ -386,7 +386,7 @@ OBJS-$(CONFIG_LIBRTMP) += librtmp.o
OBJS-$(CONFIG_APPLEHTTP_PROTOCOL) += hlsproto.o
OBJS-$(CONFIG_CONCAT_PROTOCOL) += concat.o
OBJS-$(CONFIG_CRYPTO_PROTOCOL) += crypto.o
OBJS-$(CONFIG_FFRTMPCRYPT_PROTOCOL) += rtmpcrypt.o rtmpdh.o
OBJS-$(CONFIG_FFRTMPCRYPT_PROTOCOL) += rtmpcrypt.o rtmpdigest.o rtmpdh.o
OBJS-$(CONFIG_FFRTMPHTTP_PROTOCOL) += rtmphttp.o
OBJS-$(CONFIG_FILE_PROTOCOL) += file.o
OBJS-$(CONFIG_GOPHER_PROTOCOL) += gopher.o
@ -399,12 +399,12 @@ OBJS-$(CONFIG_MD5_PROTOCOL) += md5proto.o
OBJS-$(CONFIG_MMSH_PROTOCOL) += mmsh.o mms.o asf.o
OBJS-$(CONFIG_MMST_PROTOCOL) += mmst.o mms.o asf.o
OBJS-$(CONFIG_PIPE_PROTOCOL) += file.o
OBJS-$(CONFIG_RTMP_PROTOCOL) += rtmpproto.o rtmppkt.o
OBJS-$(CONFIG_RTMPE_PROTOCOL) += rtmpproto.o rtmppkt.o
OBJS-$(CONFIG_RTMPS_PROTOCOL) += rtmpproto.o rtmppkt.o
OBJS-$(CONFIG_RTMPT_PROTOCOL) += rtmpproto.o rtmppkt.o
OBJS-$(CONFIG_RTMPTE_PROTOCOL) += rtmpproto.o rtmppkt.o
OBJS-$(CONFIG_RTMPTS_PROTOCOL) += rtmpproto.o rtmppkt.o
OBJS-$(CONFIG_RTMP_PROTOCOL) += rtmpproto.o rtmpdigest.o rtmppkt.o
OBJS-$(CONFIG_RTMPE_PROTOCOL) += rtmpproto.o rtmpdigest.o rtmppkt.o
OBJS-$(CONFIG_RTMPS_PROTOCOL) += rtmpproto.o rtmpdigest.o rtmppkt.o
OBJS-$(CONFIG_RTMPT_PROTOCOL) += rtmpproto.o rtmpdigest.o rtmppkt.o
OBJS-$(CONFIG_RTMPTE_PROTOCOL) += rtmpproto.o rtmpdigest.o rtmppkt.o
OBJS-$(CONFIG_RTMPTS_PROTOCOL) += rtmpproto.o rtmpdigest.o rtmppkt.o
OBJS-$(CONFIG_RTP_PROTOCOL) += rtpproto.o
OBJS-$(CONFIG_SCTP_PROTOCOL) += sctp.o
OBJS-$(CONFIG_SRTP_PROTOCOL) += srtpproto.o srtp.o

67
libavformat/rtmpdigest.c Normal file
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@ -0,0 +1,67 @@
/*
* RTMP network protocol
* Copyright (c) 2009 Konstantin Shishkov
*
* 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
*/
/**
* @file
* RTMP protocol digest
*/
#include <stdint.h>
#include "libavutil/error.h"
#include "libavutil/hmac.h"
#include "rtmp.h"
int ff_rtmp_calc_digest(const uint8_t *src, int len, int gap,
const uint8_t *key, int keylen, uint8_t *dst)
{
AVHMAC *hmac;
hmac = av_hmac_alloc(AV_HMAC_SHA256);
if (!hmac)
return AVERROR(ENOMEM);
av_hmac_init(hmac, key, keylen);
if (gap <= 0) {
av_hmac_update(hmac, src, len);
} else { //skip 32 bytes used for storing digest
av_hmac_update(hmac, src, gap);
av_hmac_update(hmac, src + gap + 32, len - gap - 32);
}
av_hmac_final(hmac, dst, 32);
av_hmac_free(hmac);
return 0;
}
int ff_rtmp_calc_digest_pos(const uint8_t *buf, int off, int mod_val,
int add_val)
{
int i, digest_pos = 0;
for (i = 0; i < 4; i++)
digest_pos += buf[i + off];
digest_pos = digest_pos % mod_val + add_val;
return digest_pos;
}

36
libavformat/rtmpproto.c
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@ -27,7 +27,6 @@
#include "libavcodec/bytestream.h"
#include "libavutil/avstring.h"
#include "libavutil/base64.h"
#include "libavutil/hmac.h"
#include "libavutil/intfloat.h"
#include "libavutil/lfg.h"
#include "libavutil/md5.h"
@ -957,41 +956,6 @@ static int gen_fcsubscribe_stream(URLContext *s, RTMPContext *rt,
return rtmp_send_packet(rt, &pkt, 1);
}
int ff_rtmp_calc_digest(const uint8_t *src, int len, int gap,
const uint8_t *key, int keylen, uint8_t *dst)
{
AVHMAC *hmac;
hmac = av_hmac_alloc(AV_HMAC_SHA256);
if (!hmac)
return AVERROR(ENOMEM);
av_hmac_init(hmac, key, keylen);
if (gap <= 0) {
av_hmac_update(hmac, src, len);
} else { //skip 32 bytes used for storing digest
av_hmac_update(hmac, src, gap);
av_hmac_update(hmac, src + gap + 32, len - gap - 32);
}
av_hmac_final(hmac, dst, 32);
av_hmac_free(hmac);
return 0;
}
int ff_rtmp_calc_digest_pos(const uint8_t *buf, int off, int mod_val,
int add_val)
{
int i, digest_pos = 0;
for (i = 0; i < 4; i++)
digest_pos += buf[i + off];
digest_pos = digest_pos % mod_val + add_val;
return digest_pos;
}
/**
* Put HMAC-SHA2 digest of packet data (except for the bytes where this digest
* will be stored) into that packet.