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extract_v3: fix extraction of zero length files 

The apk_istream is null for zero length files, and needs
special handling.

fixes #10784
cute-signatures
Timo Teräs 2021-11-11 11:21:04 +02:00
parent c60b7424a0
commit 9d7b4bd253
1 changed files with 3 additions and 2 deletions
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5
src/extract_v3.c
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@ -77,10 +77,11 @@ static int apk_extract_v3_file(struct apk_extract_ctx *ectx, off_t sz, struct ap
return ectx->ops->file(ectx, &fi, is);
}
fi.mode |= S_IFREG;
if (!is) return ectx->ops->file(ectx, &fi, 0);
apk_digest_from_blob(&fi.digest, adb_ro_blob(&ctx->file, ADBI_FI_HASHES));
if (fi.digest.alg == APK_DIGEST_NONE) return -APKE_ADB_SCHEMA;
fi.mode |= S_IFREG;
r = ectx->ops->file(ectx, &fi, apk_istream_verify(&dis, is, fi.size, &fi.digest));
return apk_istream_close_error(&dis.is, r);
}