def updateDigestFromRegion(self, digest, region, header_pos):
if region is None or len(region) != 16:
# What was the digest computed from?
raise ValueError, "No region"
(tag, type_, offset, count) = unpack("!2IiI", region)
# FIXME: other regions than "immutable"?
if (tag != 63 or type_ != RPM_BIN or -offset <= 0 or -offset % 16 != 0
or count != 16):
raise ValueError, "Invalid region"
regionIndexEntries = -offset / 16
if header_pos[0] is None:
raise NotImplementedError
fd = self.__getFdForRange(*header_pos)
data = fd.read(16)
if len(data) != 16:
raise ValueError, "Unexpected EOF in header"
(totalIndexEntries, totalDataSize) = unpack("!8x2I", data)
data = fd.read(16 * totalIndexEntries)
if len(data) != 16 * totalIndexEntries:
raise ValueError, "Unexpected EOF in header"
unsignedTags = []
for i in xrange(totalIndexEntries):
(tag, type_, offset, count) = \
unpack("!4I", data[i * 16 : (i + 1) * 16])
# FIXME: other regions than "immutable"?
if tag == 63:
break
unsignedTags.append(tag)
else:
raise ValueError, "%s: immutable tag disappeared" % self.source
if (type_ != RPM_BIN or count != 16
or i + regionIndexEntries > totalIndexEntries):
raise ValueError, "Invalid region tag"
digest.update(pack("!2I", regionIndexEntries, offset + 16))
digest.update(data[i * 16:(i + regionIndexEntries) * 16])
for i in xrange(i + regionIndexEntries, totalIndexEntries):
(tag, ) = unpack("!I", data[i * 16:i * 16 + 4])
unsignedTags.append(tag)
if unsignedTags:
# FIXME: only once per package
log.warning("%s: Unsigned tags %s", self.source,
[rpmtagname[i] for i in unsignedTags])
# In practice region data starts at offset 0, but the original design
# was proposing concatenated regions etc; where would the data region
# start in that case? Lowest offset in region perhaps?
functions.updateDigestFromFile(digest, fd, offset + 16)
def updateDigestFromRegion(self, digest, region, header_pos):
if region is None or len(region) != 16:
# What was the digest computed from?
raise ValueError, "No region"
(tag, type_, offset, count) = unpack("!2IiI", region)
# FIXME: other regions than "immutable"?
if (tag != 63 or type_ != RPM_BIN or -offset <= 0 or -offset % 16 != 0
or count != 16):
raise ValueError, "Invalid region"
regionIndexEntries = -offset / 16
if header_pos[0] is None:
raise NotImplementedError
fd = self.__getFdForRange(*header_pos)
data = fd.read(16)
if len(data) != 16:
raise ValueError, "Unexpected EOF in header"
(totalIndexEntries, totalDataSize) = unpack("!8x2I", data)
data = fd.read(16 * totalIndexEntries)
if len(data) != 16 * totalIndexEntries:
raise ValueError, "Unexpected EOF in header"
unsignedTags = []
for i in xrange(totalIndexEntries):
(tag, type_, offset, count) = \
unpack("!4I", data[i * 16 : (i + 1) * 16])
# FIXME: other regions than "immutable"?
if tag == 63:
break
unsignedTags.append(tag)
else:
raise ValueError, "%s: immutable tag disappeared" % self.source
if (type_ != RPM_BIN or count != 16 or
i + regionIndexEntries > totalIndexEntries):
raise ValueError, "Invalid region tag"
digest.update(pack("!2I", regionIndexEntries, offset + 16))
digest.update(data[i * 16 : (i + regionIndexEntries) * 16])
for i in xrange(i + regionIndexEntries, totalIndexEntries):
(tag,) = unpack("!I", data[i * 16 : i * 16 + 4])
unsignedTags.append(tag)
if unsignedTags:
# FIXME: only once per package
log.warning("%s: Unsigned tags %s",
self.source, [rpmtagname[i] for i in unsignedTags])
# In practice region data starts at offset 0, but the original design
# was proposing concatenated regions etc; where would the data region
# start in that case? Lowest offset in region perhaps?
functions.updateDigestFromFile(digest, fd, offset + 16)
def updateDigestFromRange(self, digest, start, len):
fd = self.__getFdForRange(start, len)
functions.updateDigestFromFile(digest, fd, len)
def updateDigestFromRange(self, digest, start, len):
fd = self.__getFdForRange(start, len)
functions.updateDigestFromFile(digest, fd, len)
