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Commit 25057a57 authored by Ilkka Ollakka's avatar Ilkka Ollakka
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livehttp: fix padding to work with iOS/Android 

Don't pad individual ts-packets, but pad just segments.
parent 71c22fb3
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Showing with 59 additions and 20 deletions
modules/access_output/livehttp.c
View file @ 25057a57
......@@ -175,6 +175,8 @@ struct sout_access_out_sys_t
uint8_t aes_ivs[16];
gcry_cipher_hd_t aes_ctx;
char *key_uri;
uint8_t stuffing_bytes[16];
ssize_t stuffing_size;
};
static int CryptSetup( sout_access_out_t *p_access );
......@@ -210,6 +212,7 @@ static int Open( vlc_object_t *p_this )
p_sys->b_caching = var_GetBool( p_access, SOUT_CFG_PREFIX "caching") ;
p_sys->b_generate_iv = var_GetBool( p_access, SOUT_CFG_PREFIX "generate-iv") ;
p_sys->stuffing_size = 0;
/* 5 elements is from harrison-stetson algorithm to start from some number
* if we don't have numsegs defined
......@@ -545,6 +548,21 @@ static void closeCurrentSegment( sout_access_out_t *p_access, sout_access_out_sy
{
if ( p_sys->i_handle >= 0 )
{
if( p_sys->key_uri )
{
size_t pad = 16 - p_sys->stuffing_size;
memset(&p_sys->stuffing_bytes[p_sys->stuffing_size], pad, pad);
gcry_error_t err = gcry_cipher_encrypt( p_sys->aes_ctx, p_sys->stuffing_bytes, 16, NULL, 0 );
if( err ) {
msg_Err( p_access, "Couldn't encrypt 16 bytes: %s", gpg_strerror(err) );
} else {
int ret = write( p_sys->i_handle, p_sys->stuffing_bytes, 16 );
if( ret != 16 )
msg_Err( p_access, "Couldn't write 16 bytes" );
}
p_sys->stuffing_size = 0;
}
close( p_sys->i_handle );
p_sys->i_handle = -1;
if ( p_sys->psz_cursegPath )
......@@ -566,28 +584,37 @@ static void Close( vlc_object_t * p_this )
sout_access_out_sys_t *p_sys = p_access->p_sys;
msg_Dbg( p_access, "Flushing buffer to last file");
bool crypted = false;
while( p_sys->block_buffer )
{
if( p_sys->key_uri )
if( p_sys->key_uri && !crypted)
{
if( p_sys->stuffing_size )
{
p_sys->block_buffer = block_Realloc( p_sys->block_buffer, p_sys->stuffing_size, p_sys->block_buffer->i_buffer );
if( unlikely(!p_sys->block_buffer) )
return;
memcpy( p_sys->block_buffer->p_buffer, p_sys->stuffing_bytes, p_sys->stuffing_size );
p_sys->stuffing_size = 0;
}
size_t original = p_sys->block_buffer->i_buffer;
size_t padded = (p_sys->block_buffer->i_buffer + 15 ) & ~15;
if( padded == p_sys->block_buffer->i_buffer )
padded += 16;
p_sys->block_buffer = block_Realloc( p_sys->block_buffer, 0, padded );
if( !p_sys->block_buffer )
break;
int pad = padded - original;
memset( &p_sys->block_buffer->p_buffer[original], pad, pad );
size_t padded = (original + 15 ) & ~15;
size_t pad = padded - original;
if( pad )
{
p_sys->stuffing_size = 16 - pad;
p_sys->block_buffer->i_buffer -= p_sys->stuffing_size;
memcpy( p_sys->stuffing_bytes, &p_sys->block_buffer->p_buffer[p_sys->block_buffer->i_buffer], p_sys->stuffing_size );
}
gcry_error_t err = gcry_cipher_encrypt( p_sys->aes_ctx,
p_sys->block_buffer->p_buffer, padded, NULL, 0 );
p_sys->block_buffer->p_buffer, p_sys->block_buffer->i_buffer, NULL, 0 );
if( err )
{
msg_Err( p_access, "Encryption failure: %s ", gpg_strerror(err) );
break;
}
crypted = true;
}
ssize_t val = write( p_sys->i_handle, p_sys->block_buffer->p_buffer, p_sys->block_buffer->i_buffer );
if ( val == -1 )
......@@ -609,6 +636,7 @@ static void Close( vlc_object_t * p_this )
block_t *p_next = p_sys->block_buffer->p_next;
block_Release (p_sys->block_buffer);
p_sys->block_buffer = p_next;
crypted=false;
}
else
{
......@@ -697,6 +725,7 @@ static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer )
{
if ( ( p_sys->b_splitanywhere || ( p_buffer->i_flags & BLOCK_FLAG_HEADER ) ) )
{
bool crypted = false;
block_t *output = p_sys->block_buffer;
p_sys->block_buffer = NULL;
......@@ -716,25 +745,34 @@ static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer )
while( output )
{
if( p_sys->key_uri )
if( p_sys->key_uri && !crypted )
{
if( p_sys->stuffing_size )
{
output = block_Realloc( output, p_sys->stuffing_size, output->i_buffer );
if( unlikely(!output ) )
return VLC_ENOMEM;
memcpy( output->p_buffer, p_sys->stuffing_bytes, p_sys->stuffing_size );
p_sys->stuffing_size = 0;
}
size_t original = output->i_buffer;
size_t padded = (output->i_buffer + 15 ) & ~15;
if( padded == output->i_buffer )
padded += 16;
output = block_Realloc( output, 0, padded );
if( !output )
return VLC_ENOMEM;
int pad = padded - original;
memset( &output->p_buffer[original], pad, pad );
size_t pad = padded - original;
if( pad )
{
p_sys->stuffing_size = 16-pad;
output->i_buffer -= p_sys->stuffing_size;
memcpy(p_sys->stuffing_bytes, &output->p_buffer[output->i_buffer], p_sys->stuffing_size);
}
gcry_error_t err = gcry_cipher_encrypt( p_sys->aes_ctx,
output->p_buffer, padded, NULL, 0 );
output->p_buffer, output->i_buffer, NULL, 0 );
if( err )
{
msg_Err( p_access, "Encryption failure: %s ", gpg_strerror(err) );
return -1;
}
crypted=true;
}
ssize_t val = write( p_sys->i_handle, output->p_buffer, output->i_buffer );
......@@ -754,6 +792,7 @@ static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer )
block_t *p_next = output->p_next;
block_Release (output);
output = p_next;
crypted=false;
}
else
{
......
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