[FFmpeg-devel] [PATCH V4 2/2] lavf/libsrt: enable other encryption parameters
mypopy at gmail.com
mypopy at gmail.com
Sun Dec 15 04:22:18 EET 2019
On Sun, Dec 15, 2019 at 4:48 AM Marton Balint <cus at passwd.hu> wrote:
>
>
> On Wed, 4 Dec 2019, Jun Zhao wrote:
>
> > From: Jun Zhao <barryjzhao at tencent.com>
> >
> > Enable the SRTO_ENFORCEDENCRYPTION/SRTO_KMREFRESHRATE/
> > SRTO_KMPREANNOUNCE for srt encryption control.
> >
> > Signed-off-by: Jun Zhao <barryjzhao at tencent.com>
> > ---
> > doc/protocols.texi | 20 ++++++++++++++++++++
> > libavformat/libsrt.c | 18 ++++++++++++++++++
> > 2 files changed, 38 insertions(+), 0 deletions(-)
> >
> > diff --git a/doc/protocols.texi b/doc/protocols.texi
> > index 886c3b8..d2935fc 100644
> > --- a/doc/protocols.texi
> > +++ b/doc/protocols.texi
> > @@ -1282,6 +1282,26 @@ only if @option{pbkeylen} is non-zero. It is used on
> > the receiver only if the received data is encrypted.
> > The configured passphrase cannot be recovered (write-only).
> >
> > + at item enforced_encryption=@var{1|0}
> > +If true, both connection parties must have the same password
> > +set (including empty, that is, with no encryption). If the
> > +password doesn't match or only one side is unencrypted,
> > +the connection is rejected. Default is true.
> > +
> > + at item kmrefreshrate=@var{packets}
> > +The number of packets to be transmitted after which the
> > +encryption key is switched to a new key. Default is -1.
> > +-1 means auto (0x1000000 in srt library). The range for
> > +this option is integers in the 0 - @code{INT_MAX}.
> > +
> > + at item kmpreannounce=@var{packets}
> > +The interval between when a new encryption key is sent and
> > +when switchover occurs. This value also applies to the
> > +subsequent interval between when switchover occurs and
> > +when the old encryption key is decommissioned. Default is -1.
> > +-1 means auto (0x1000 in srt library). The range for
> > +this option is integers in the 0 - @code{INT_MAX}.
> > +
> > @item payload_size=@var{bytes}
> > Sets the maximum declared size of a packet transferred
> > during the single call to the sending function in Live
> > diff --git a/libavformat/libsrt.c b/libavformat/libsrt.c
> > index 0a748a1..05a46c6 100644
> > --- a/libavformat/libsrt.c
> > +++ b/libavformat/libsrt.c
> > @@ -62,6 +62,9 @@ typedef struct SRTContext {
> > int64_t maxbw;
> > int pbkeylen;
> > char *passphrase;
> > + int enforced_encryption;
> > + int kmrefreshrate;
> > + int kmpreannounce;
> > int mss;
> > int ffs;
> > int ipttl;
> > @@ -102,6 +105,9 @@ static const AVOption libsrt_options[] = {
> > { "maxbw", "Maximum bandwidth (bytes per second) that the connection can use", OFFSET(maxbw), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, .flags = D|E },
> > { "pbkeylen", "Crypto key len in bytes {16,24,32} Default: 16 (128-bit)", OFFSET(pbkeylen), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 32, .flags = D|E },
> > { "passphrase", "Crypto PBKDF2 Passphrase size[0,10..64] 0:disable crypto", OFFSET(passphrase), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
> > + { "enforced_encryption", "Enforces that both connection parties have the same passphrase set ", OFFSET(enforced_encryption), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
> > + { "kmrefreshrate", "The number of packets to be transmitted after which the encryption key is switched to a new key", OFFSET(kmrefreshrate), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
> > + { "kmpreannounce", "The interval between when a new encryption key is sent and when switchover occurs", OFFSET(kmpreannounce), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
> > { "mss", "The Maximum Segment Size", OFFSET(mss), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1500, .flags = D|E },
> > { "ffs", "Flight flag size (window size) (in bytes)", OFFSET(ffs), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
> > { "ipttl", "IP Time To Live", OFFSET(ipttl), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 255, .flags = D|E },
> > @@ -321,6 +327,9 @@ static int libsrt_set_options_pre(URLContext *h, int fd)
> > (s->maxbw >= 0 && libsrt_setsockopt(h, fd, SRTO_MAXBW, "SRTO_MAXBW", &s->maxbw, sizeof(s->maxbw)) < 0) ||
> > (s->pbkeylen >= 0 && libsrt_setsockopt(h, fd, SRTO_PBKEYLEN, "SRTO_PBKEYLEN", &s->pbkeylen, sizeof(s->pbkeylen)) < 0) ||
> > (s->passphrase && libsrt_setsockopt(h, fd, SRTO_PASSPHRASE, "SRTO_PASSPHRASE", s->passphrase, strlen(s->passphrase)) < 0) ||
> > + (s->enforced_encryption >= 0 && libsrt_setsockopt(h, fd, SRTO_ENFORCEDENCRYPTION, "SRTO_ENFORCEDENCRYPTION", &s->enforced_encryption, sizeof(s->enforced_encryption)) < 0) ||
> > + (s->kmrefreshrate >= 0 && libsrt_setsockopt(h, fd, SRTO_KMREFRESHRATE, "SRTO_KMREFRESHRATE", &s->kmrefreshrate, sizeof(s->kmrefreshrate)) < 0) ||
> > + (s->kmpreannounce >= 0 && libsrt_setsockopt(h, fd, SRTO_KMPREANNOUNCE, "SRTO_KMPREANNOUNCE", &s->kmpreannounce, sizeof(s->kmpreannounce)) < 0) ||
>
> These are only available since 1.3.2, so this should be guarded by
> #if SRT_VERSION_VALUE >= 0x010302 or something similar.
>
> Instead of SRTO_ENFORCEDENCRYPTION SRTO_STRICTENC should be used for
> compatiblity, because the rename only happened in 1.4.0.
>
Will add compatiblity check, tks
> > (s->mss >= 0 && libsrt_setsockopt(h, fd, SRTO_MSS, "SRTO_MMS", &s->mss, sizeof(s->mss)) < 0) ||
> > (s->ffs >= 0 && libsrt_setsockopt(h, fd, SRTO_FC, "SRTO_FC", &s->ffs, sizeof(s->ffs)) < 0) ||
> > (s->ipttl >= 0 && libsrt_setsockopt(h, fd, SRTO_IPTTL, "SRTO_UPTTL", &s->ipttl, sizeof(s->ipttl)) < 0) ||
> > @@ -506,6 +515,15 @@ static int libsrt_open(URLContext *h, const char *uri, int flags)
> > if (av_find_info_tag(buf, sizeof(buf), "passphrase", p)) {
> > s->passphrase = av_strndup(buf, strlen(buf));
> > }
> > + if (av_find_info_tag(buf, sizeof(buf), "enforced_encryption", p)) {
> > + s->enforced_encryption = strtol(buf, NULL, 10);
> > + }
> > + if (av_find_info_tag(buf, sizeof(buf), "kmrefreshrate", p)) {
> > + s->kmrefreshrate = strtol(buf, NULL, 10);
> > + }
> > + if (av_find_info_tag(buf, sizeof(buf), "kmpreannounce", p)) {
> > + s->kmpreannounce = strtol(buf, NULL, 10);
> > + }
> > if (av_find_info_tag(buf, sizeof(buf), "mss", p)) {
> > s->mss = strtol(buf, NULL, 10);
> > }
> > --
>
> Regards,
> Marton
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