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Revert "Verify repodata signature"

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This reverts commit a7830cf780.
This commit is contained in:
Juan RP 2020-01-06 14:33:49 +01:00
parent b4fdc39e67
commit d2208f91e0
No known key found for this signature in database
GPG Key ID: AF19F6CB482F9368
7 changed files with 32 additions and 121 deletions
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16
include/xbps.h.in
View File

@ -1894,22 +1894,6 @@ int xbps_file_hash_check(const char *file, const char *sha256);
bool xbps_verify_signature(struct xbps_repo *repo, const char *sigfile,
unsigned char *digest);
/**
* Verifies the RSA signature \sig_buf of bytes with hash \a digest
* with the RSA public-key associated in \a repo.
*
* @param[in] repo Repository to use with the RSA public key associated.
* @param[in] idxmeta Meta dictionary related to \a repo, containing
* public-key field.
* @param[in] sig_buf The signature of file content that has hash \digest.
* @param[in] sigfilelen The length of signature.
* @param[in] digest The digest of file content to verify.
*
* @return True if the signature is valid, false otherwise.
*/
bool xbps_verify_digest_signature(struct xbps_repo *repo, xbps_dictionary_t idxmeta,
unsigned char *sig_buf, size_t sigfilelen, unsigned char *digest);
/**
* Verifies the RSA signature of \a fname with the RSA public-key associated
* in \a repo.

3
include/xbps_api_impl.h
View File

@ -149,8 +149,7 @@ int HIDDEN xbps_register_pkg(struct xbps_handle *, xbps_dictionary_t);
void HIDDEN xbps_transaction_conflicts(struct xbps_handle *, xbps_array_t);
char HIDDEN *xbps_archive_get_file(struct archive *, struct archive_entry *);
xbps_dictionary_t HIDDEN xbps_archive_get_dictionary(struct archive *,
struct archive_entry *, char **bytes);
xbps_dictionary_t HIDDEN get_safe_idxmeta(xbps_dictionary_t full);
struct archive_entry *);
const char HIDDEN *vpkg_user_conf(struct xbps_handle *, const char *, bool);
xbps_array_t HIDDEN xbps_get_pkg_fulldeptree(struct xbps_handle *,
const char *, bool);

6
lib/archive.c
View File

@ -56,7 +56,7 @@ xbps_archive_get_file(struct archive *ar, struct archive_entry *entry)
}
xbps_dictionary_t HIDDEN
xbps_archive_get_dictionary(struct archive *ar, struct archive_entry *entry, char **bytes)
xbps_archive_get_dictionary(struct archive *ar, struct archive_entry *entry)
{
xbps_dictionary_t d = NULL;
char *buf;
@ -66,11 +66,7 @@ xbps_archive_get_dictionary(struct archive *ar, struct archive_entry *entry, cha
/* If blob is already a dictionary we are done */
d = xbps_dictionary_internalize(buf);
if (bytes == NULL) {
free(buf);
} else {
*bytes = buf;
}
return d;
}

4
lib/package_unpack.c
View File

@ -180,13 +180,13 @@ unpack_archive(struct xbps_handle *xhp,
goto out;
}
} else if (strcmp("./props.plist", entry_pname) == 0) {
binpkg_propsd = xbps_archive_get_dictionary(ar, entry, NULL);
binpkg_propsd = xbps_archive_get_dictionary(ar, entry);
if (binpkg_propsd == NULL) {
rv = EINVAL;
goto out;
}
} else if (strcmp("./files.plist", entry_pname) == 0) {
binpkg_filesd = xbps_archive_get_dictionary(ar, entry, NULL);
binpkg_filesd = xbps_archive_get_dictionary(ar, entry);
if (binpkg_filesd == NULL) {
rv = EINVAL;
goto out;

74
lib/repo.c
View File

@ -61,48 +61,11 @@ xbps_repo_path_with_name(struct xbps_handle *xhp, const char *url, const char *n
url, xhp->target_arch ? xhp->target_arch : xhp->native_arch, name);
}
static int
repo_verify_index(struct xbps_repo *repo, xbps_dictionary_t idxmeta, unsigned char *digest) {
bool verified = false;
unsigned char *sig_buf = NULL;
size_t sigfilelen = 0;
struct archive_entry *entry;
if (archive_read_next_header(repo->ar, &entry) != ARCHIVE_OK) {
xbps_dbg_printf(repo->xhp,
"%s: read_next_header %s\n", repo->uri,
archive_error_string(repo->ar));
return ENOENT;
}
if (strcmp(archive_entry_pathname(entry), XBPS_REPOIDXMETA_SIG) != 0) {
xbps_dbg_printf(repo->xhp,
"%s: no signature of %s\n", repo->uri, XBPS_REPOIDX_META);
return ENOENT;
}
sigfilelen = (size_t)archive_entry_size(entry);
sig_buf = (unsigned char *) xbps_archive_get_file(repo->ar, entry);
if (sig_buf == NULL) {
return EIO;
}
verified = xbps_verify_digest_signature(repo, idxmeta, sig_buf, sigfilelen, digest);
free(sig_buf);
return verified ? 0 : EINVAL;
}
static xbps_dictionary_t
repo_get_dict(struct xbps_repo *repo, int *verify_error)
repo_get_dict(struct xbps_repo *repo)
{
struct archive_entry *entry;
int rv;
xbps_dictionary_t dict, idxmeta;
char *bytes = NULL;
unsigned char *digest = NULL;
if (verify_error != NULL)
*verify_error = -1;
if (repo->ar == NULL)
return NULL;
@ -114,15 +77,7 @@ repo_get_dict(struct xbps_repo *repo, int *verify_error)
archive_error_string(repo->ar));
return NULL;
}
dict = xbps_archive_get_dictionary(repo->ar, entry, &bytes);
idxmeta = (repo->idxmeta != NULL) ? repo->idxmeta : dict;
if (verify_error != NULL && bytes != NULL) {
digest = xbps_buffer_hash_raw(bytes, strlen(bytes));
*verify_error = repo_verify_index(repo, idxmeta, digest);
}
free(digest);
free(bytes);
return dict;
return xbps_archive_get_dictionary(repo->ar, entry);
}
@ -209,9 +164,6 @@ repo_open_local(struct xbps_repo *repo, const char *repofile)
{
struct stat st;
int rv = 0;
int verify_error = -1;
const char *signature_type = NULL;
xbps_dictionary_t idxmeta = NULL;
if (fstat(repo->fd, &st) == -1) {
rv = errno;
@ -235,7 +187,7 @@ repo_open_local(struct xbps_repo *repo, const char *repofile)
repofile, strerror(rv));
return false;
}
if ((repo->idx = repo_get_dict(repo, NULL)) == NULL) {
if ((repo->idx = repo_get_dict(repo)) == NULL) {
xbps_dbg_printf(repo->xhp, "[repo] `%s' failed to internalize "
" index on archive, removing file.\n", repofile);
/* broken archive, remove it */
@ -243,26 +195,14 @@ repo_open_local(struct xbps_repo *repo, const char *repofile)
return false;
}
xbps_dictionary_make_immutable(repo->idx);
idxmeta = repo_get_dict(repo, &verify_error);
if (idxmeta != NULL) {
if (verify_error == ENOENT) {
xbps_dbg_printf(repo->xhp, "Metadata of repo '%s' not signed. Taking safe part.\n", repofile);
idxmeta = get_safe_idxmeta(idxmeta);
verify_error = 0;
} else if (verify_error) {
xbps_warn_printf("Verification of repo's '%s' signature failed. Taking safe part.\n", repofile);
idxmeta = get_safe_idxmeta(idxmeta);
} else {
xbps_dbg_printf(repo->xhp, "Verification of repo's '%s' signature passed.\n", repofile);
}
if (xbps_dictionary_get_cstring_nocopy(idxmeta, "signature-type", &signature_type)) {
repo->idxmeta = repo_get_dict(repo);
if (repo->idxmeta != NULL) {
repo->is_signed = true;
}
xbps_dictionary_make_immutable(idxmeta);
xbps_dictionary_make_immutable(repo->idxmeta);
}
repo->idxmeta = idxmeta;
return !verify_error || (!repo->is_remote && !repo->is_signed);
return true;
}
static bool

2
lib/transaction_files.c
View File

@ -732,7 +732,7 @@ collect_binpkg_files(struct xbps_handle *xhp, xbps_dictionary_t pkg_repod,
entry_pname = archive_entry_pathname(entry);
if ((strcmp("./files.plist", entry_pname)) == 0) {
filesd = xbps_archive_get_dictionary(ar, entry, NULL);
filesd = xbps_archive_get_dictionary(ar, entry);
if (filesd == NULL) {
rv = EINVAL;
goto out;

42
lib/verifysig.c
View File

@ -72,24 +72,28 @@ rsa_verify_hash(struct xbps_repo *repo, xbps_data_t pubkey,
}
bool
xbps_verify_digest_signature(struct xbps_repo *repo, xbps_dictionary_t idxmeta,
unsigned char *sig_buf, size_t sigfilelen, unsigned char *digest)
xbps_verify_signature(struct xbps_repo *repo, const char *sigfile,
unsigned char *digest)
{
xbps_dictionary_t repokeyd = NULL;
xbps_data_t pubkey;
char *hexfp = NULL, *rkeyfile = NULL;
char *hexfp = NULL;
unsigned char *sig_buf = NULL;
size_t sigbuflen, sigfilelen;
char *rkeyfile = NULL;
bool val = false;
if (!xbps_dictionary_count(idxmeta)) {
if (!xbps_dictionary_count(repo->idxmeta)) {
xbps_dbg_printf(repo->xhp, "%s: unsigned repository\n", repo->uri);
return false;
}
hexfp = xbps_pubkey2fp(repo->xhp,
xbps_dictionary_get(idxmeta, "public-key"));
xbps_dictionary_get(repo->idxmeta, "public-key"));
if (hexfp == NULL) {
xbps_dbg_printf(repo->xhp, "%s: incomplete signed repo, missing hexfp obj\n", repo->uri);
return false;
}
/*
* Prepare repository RSA public key to verify fname signature.
*/
@ -109,6 +113,12 @@ xbps_verify_digest_signature(struct xbps_repo *repo, xbps_dictionary_t idxmeta,
pubkey = xbps_dictionary_get(repokeyd, "public-key");
if (xbps_object_type(pubkey) != XBPS_TYPE_DATA)
goto out;
if (!xbps_mmap_file(sigfile, (void *)&sig_buf, &sigbuflen, &sigfilelen)) {
xbps_dbg_printf(repo->xhp, "can't open signature file %s: %s\n",
sigfile, strerror(errno));
goto out;
}
/*
* Verify fname RSA signature.
*/
@ -120,32 +130,14 @@ out:
free(hexfp);
if (rkeyfile)
free(rkeyfile);
if (sig_buf)
(void)munmap(sig_buf, sigbuflen);
if (repokeyd)
xbps_object_release(repokeyd);
return val;
}
bool
xbps_verify_signature(struct xbps_repo *repo, const char *sigfile,
unsigned char *digest)
{
unsigned char *sig_buf = NULL;
size_t sigbuflen, sigfilelen;
bool result = false;
if (xbps_mmap_file(sigfile, (void *)&sig_buf, &sigbuflen, &sigfilelen)) {
result = xbps_verify_digest_signature(repo, repo->idxmeta, sig_buf, sigfilelen, digest);
} else {
xbps_dbg_printf(repo->xhp, "can't open signature file %s: %s\n",
sigfile, strerror(errno));
}
if (sig_buf)
(void)munmap(sig_buf, sigbuflen);
return result;
}
bool
xbps_verify_file_signature(struct xbps_repo *repo, const char *fname)
{