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metadata/smaf.c handle read errors 

Change-Id: I450f1fc8e1b69ce09f9888f5384c3e23a93822a1
This commit is contained in:
William Wilgus 2021-08-06 22:40:01 -04:00 committed by William Wilgus
parent 8a8fd3d4a3
commit 603e749c1d
1 changed files with 27 additions and 26 deletions
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53
lib/rbcodec/metadata/smaf.c
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@ -137,18 +137,19 @@ static void decode2utf8(const unsigned char *src, unsigned char **dst,
*dstsize -= utf8size;
}
static int read_audio_track_contets(int fd, int codepage, unsigned char **dst,
static int read_audio_track_contents(int fd, int codepage, unsigned char **dst,
int *dstsize)
{
/* value length <= 256 bytes */
unsigned char buf[256];
unsigned char *p = buf;
unsigned char *q = buf;
int datasize;
read(fd, buf, 256);
int datasize = read(fd, buf, 256);
if (datasize <= 0)
return 0;
while (p - buf < 256 && *p != ',')
while (p - buf < datasize && *p != ',')
{
/* skip yen mark */
if (codepage != UCS2)
@ -177,6 +178,7 @@ static int read_audio_track_contets(int fd, int codepage, unsigned char **dst,
if (codepage == UCS2)
*q++ = *p++;
}
datasize = p - buf + 1;
lseek(fd, datasize - 256, SEEK_CUR);
@ -186,12 +188,12 @@ static int read_audio_track_contets(int fd, int codepage, unsigned char **dst,
return datasize;
}
static void read_score_track_contets(int fd, int codepage, int datasize,
static void read_score_track_contents(int fd, int codepage, int datasize,
unsigned char **dst, int *dstsize)
{
unsigned char buf[datasize];
read(fd, buf, datasize);
if (read(fd, buf, datasize) != datasize)
memset(buf, 0, datasize);
decode2utf8(buf, dst, datasize, dstsize, codepage);
}
@ -202,7 +204,7 @@ static unsigned int search_chunk(int fd, const unsigned char *name, int nlen)
unsigned char buf[8];
unsigned int chunksize;
while (read(fd, buf, 8) > 0)
while (read(fd, buf, 8) == 8)
{
chunksize = get_long_be(buf + 4);
if (memcmp(buf, name, nlen) == 0)
@ -221,15 +223,14 @@ static bool parse_smaf_audio_track(int fd, struct mp3entry *id3, unsigned int da
/* contents stored buffer */
unsigned char *buf = id3->id3v2buf;
int bufsize = sizeof(id3->id3v2buf);
unsigned int chunksize = datasize;
int valsize;
int codepage;
unsigned int chunksize = datasize;
int codepage = -1;
/* parse contents info */
read(fd, tmp, 5);
codepage = convert_smaf_codetype(tmp[2]);
if (read(fd, tmp, 5) == 5)
codepage = convert_smaf_codetype(tmp[2]);
if (codepage < 0)
{
DEBUGF("metadata error: smaf unsupport codetype: %d\n", tmp[2]);
@ -240,7 +241,7 @@ static bool parse_smaf_audio_track(int fd, struct mp3entry *id3, unsigned int da
while ((id3->title == NULL || id3->artist == NULL || id3->composer == NULL)
&& (datasize > 0 && bufsize > 0))
{
if (read(fd, tmp, 3) <= 0)
if (read(fd, tmp, 3) != 3)
return false;
if (tmp[2] != ':')
@ -252,18 +253,18 @@ static bool parse_smaf_audio_track(int fd, struct mp3entry *id3, unsigned int da
{
case TAG_TITLE:
id3->title = buf;
valsize = read_audio_track_contets(fd, codepage, &buf, &bufsize);
valsize = read_audio_track_contents(fd, codepage, &buf, &bufsize);
break;
case TAG_ARTIST:
id3->artist = buf;
valsize = read_audio_track_contets(fd, codepage, &buf, &bufsize);
valsize = read_audio_track_contents(fd, codepage, &buf, &bufsize);
break;
case TAG_COMPOSER:
id3->composer = buf;
valsize = read_audio_track_contets(fd, codepage, &buf, &bufsize);
valsize = read_audio_track_contents(fd, codepage, &buf, &bufsize);
break;
default:
valsize = read_audio_track_contets(fd, codepage, NULL, &bufsize);
valsize = read_audio_track_contents(fd, codepage, NULL, &bufsize);
break;
}
datasize -= (valsize + 3);
@ -353,7 +354,7 @@ static bool parse_smaf_score_track(int fd, struct mp3entry *id3)
while ((id3->title == NULL || id3->artist == NULL || id3->composer == NULL)
&& (datasize > 0 && bufsize > 0))
{
if (read(fd, tmp, 4) <= 0)
if (read(fd, tmp, 4) != 4)
return false;
valsize = (tmp[2] << 8) | tmp[3];
@ -362,15 +363,15 @@ static bool parse_smaf_score_track(int fd, struct mp3entry *id3)
{
case TAG_TITLE:
id3->title = buf;
read_score_track_contets(fd, codepage, valsize, &buf, &bufsize);
read_score_track_contents(fd, codepage, valsize, &buf, &bufsize);
break;
case TAG_ARTIST:
id3->artist = buf;
read_score_track_contets(fd, codepage, valsize, &buf, &bufsize);
read_score_track_contents(fd, codepage, valsize, &buf, &bufsize);
break;
case TAG_COMPOSER:
id3->composer = buf;
read_score_track_contets(fd, codepage, valsize, &buf, &bufsize);
read_score_track_contents(fd, codepage, valsize, &buf, &bufsize);
break;
default:
lseek(fd, valsize, SEEK_CUR);
@ -449,10 +450,10 @@ bool get_smaf_metadata(int fd, struct mp3entry* id3)
/* check File Chunk and Contents Info Chunk */
lseek(fd, 0, SEEK_SET);
read(fd, tmp, 16);
if ((memcmp(tmp, "MMMD", 4) != 0) || (memcmp(tmp + 8, "CNTI", 4) != 0))
if (read(fd, tmp, 16) != 16 || (memcmp(tmp, "MMMD", 4) != 0) || (memcmp(tmp + 8, "CNTI", 4) != 0))
{
DEBUGF("metadata error: does not smaf format\n");
DEBUGF("metadata error: no smaf format\n");
return false;
}