packages/s3ql: init with S3v4 auth patch
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2 changed files with 175 additions and 0 deletions
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@ -97,6 +97,12 @@ super: rec {
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prometheus-jitsi-exporter = patch super.prometheus-jitsi-exporter "patches/base/prometheus-jitsi-exporter";
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s3ql = (patch super.s3ql "patches/base/s3ql").overrideAttrs (old: {
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propagatedBuildInputs = old.propagatedBuildInputs ++ [
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super.python3Packages.systemd
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];
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});
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tempo = (super.tempo.override { buildGoModule = super.buildGo119Module; }).overrideAttrs (_: {
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version = builtins.substring 1 (-1) pins.tempo.version;
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src = super.npins.mkSource pins.tempo;
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169
patches/base/s3ql/s3v4.patch
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169
patches/base/s3ql/s3v4.patch
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@ -0,0 +1,169 @@
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diff --git a/src/s3ql/backends/s3.py b/src/s3ql/backends/s3.py
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index d19b783..5b5831f 100644
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--- a/src/s3ql/backends/s3.py
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+++ b/src/s3ql/backends/s3.py
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@@ -9,6 +9,7 @@ This work can be distributed under the terms of the GNU GPLv3.
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from ..logging import logging, QuietError # Ensure use of custom logger class
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from . import s3c
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from .s3c import get_S3Error
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+from .s3c import hmac_sha256
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from .common import NoSuchObject, retry
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from ..inherit_docstrings import copy_ancestor_docstring
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from xml.sax.saxutils import escape as xml_escape
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@@ -236,10 +237,3 @@ class Backend(s3c.Backend):
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signing_key = hmac_sha256(service_key, b'aws4_request')
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self.signing_key = (signing_key, ymd)
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-
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-def hmac_sha256(key, msg, hex=False):
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- d = hmac.new(key, msg, hashlib.sha256)
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- if hex:
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- return d.hexdigest()
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- else:
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- return d.digest()
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diff --git a/src/s3ql/backends/s3c.py b/src/s3ql/backends/s3c.py
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index 11687d5..8d9f887 100644
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--- a/src/s3ql/backends/s3c.py
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+++ b/src/s3ql/backends/s3c.py
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@@ -78,6 +78,8 @@ class Backend(AbstractBackend, metaclass=ABCDocstMeta):
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self.conn = self._get_conn()
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self.password = options.backend_password
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self.login = options.backend_login
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+ self.region = "us-east-1"
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+ self.signing_key = None
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@property
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@copy_ancestor_docstring
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@@ -597,43 +599,76 @@ class Backend(AbstractBackend, metaclass=ABCDocstMeta):
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def _authorize_request(self, method, path, headers, subres, query_string):
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'''Add authorization information to *headers*'''
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- # See http://docs.amazonwebservices.com/AmazonS3/latest/dev/RESTAuthentication.html
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+ # See http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-auth-using-authorization-header.html
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- # Date, can't use strftime because it's locale dependent
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now = time.gmtime()
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- headers['Date'] = ('%s, %02d %s %04d %02d:%02d:%02d GMT'
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- % (C_DAY_NAMES[now.tm_wday],
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- now.tm_mday,
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- C_MONTH_NAMES[now.tm_mon - 1],
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- now.tm_year, now.tm_hour,
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- now.tm_min, now.tm_sec))
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-
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- auth_strs = [method, '\n']
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-
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- for hdr in ('Content-MD5', 'Content-Type', 'Date'):
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- if hdr in headers:
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- auth_strs.append(headers[hdr])
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- auth_strs.append('\n')
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-
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- for hdr in sorted(x for x in headers if x.lower().startswith('x-amz-')):
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- val = ' '.join(re.split(r'\s*\n\s*', headers[hdr].strip()))
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- auth_strs.append('%s:%s\n' % (hdr, val))
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-
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- # Always include bucket name in path for signing
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- if self.hostname.startswith(self.bucket_name):
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- path = '/%s%s' % (self.bucket_name, path)
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- sign_path = urllib.parse.quote(path)
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- auth_strs.append(sign_path)
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- if subres:
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- auth_strs.append('?%s' % subres)
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+ #now = time.strptime('Fri, 24 May 2013 00:00:00 GMT',
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+ # '%a, %d %b %Y %H:%M:%S GMT')
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- # False positive, hashlib *does* have sha1 member
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- #pylint: disable=E1101
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- auth_str = ''.join(auth_strs).encode()
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- signature = b64encode(hmac.new(self.password.encode(), auth_str,
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- hashlib.sha1).digest()).decode()
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+ ymd = time.strftime('%Y%m%d', now)
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+ ymdhms = time.strftime('%Y%m%dT%H%M%SZ', now)
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- headers['Authorization'] = 'AWS %s:%s' % (self.login, signature)
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+ headers['x-amz-date'] = ymdhms
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+ headers['x-amz-content-sha256'] = 'UNSIGNED-PAYLOAD'
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+ #headers['x-amz-content-sha256'] = hashlib.sha256(body).hexdigest()
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+ headers.pop('Authorization', None)
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+
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+ auth_strs = [method]
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+ auth_strs.append(urllib.parse.quote(path))
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+
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+ if query_string:
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+ s = urllib.parse.urlencode(query_string, doseq=True,
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+ quote_via=urllib.parse.quote).split('&')
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+ else:
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+ s = []
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+ if subres:
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+ s.append(urllib.parse.quote(subres) + '=')
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+ if s:
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+ s = '&'.join(sorted(s))
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+ else:
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+ s = ''
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+ auth_strs.append(s)
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+
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+ # Headers
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+ sig_hdrs = sorted(x.lower() for x in headers.keys())
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+ for hdr in sig_hdrs:
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+ auth_strs.append('%s:%s' % (hdr, headers[hdr].strip()))
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+ auth_strs.append('')
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+ auth_strs.append(';'.join(sig_hdrs))
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+ auth_strs.append(headers['x-amz-content-sha256'])
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+ can_req = '\n'.join(auth_strs)
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+ #log.debug('canonical request: %s', can_req)
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+
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+ can_req_hash = hashlib.sha256(can_req.encode()).hexdigest()
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+ str_to_sign = ("AWS4-HMAC-SHA256\n" + ymdhms + '\n' +
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+ '%s/%s/s3/aws4_request\n' % (ymd, self.region) +
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+ can_req_hash)
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+ #log.debug('string to sign: %s', str_to_sign)
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+
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+ if self.signing_key is None or self.signing_key[1] != ymd:
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+ self.update_signing_key(ymd)
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+ signing_key = self.signing_key[0]
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+
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+ sig = hmac_sha256(signing_key, str_to_sign.encode(), hex=True)
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+
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+ cred = ('%s/%04d%02d%02d/%s/s3/aws4_request'
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+ % (self.login, now.tm_year, now.tm_mon, now.tm_mday,
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+ self.region))
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+
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+ headers['Authorization'] = (
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+ 'AWS4-HMAC-SHA256 '
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+ 'Credential=%s,'
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+ 'SignedHeaders=%s,'
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+ 'Signature=%s' % (cred, ';'.join(sig_hdrs), sig))
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+
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+ def update_signing_key(self, ymd):
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+ date_key = hmac_sha256(("AWS4" + self.password).encode(),
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+ ymd.encode())
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+ region_key = hmac_sha256(date_key, self.region.encode())
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+ service_key = hmac_sha256(region_key, b's3')
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+ signing_key = hmac_sha256(service_key, b'aws4_request')
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+
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+ self.signing_key = (signing_key, ymd)
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def _send_request(self, method, path, headers, subres=None, query_string=None, body=None):
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'''Add authentication and send request
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@@ -646,7 +681,7 @@ class Backend(AbstractBackend, metaclass=ABCDocstMeta):
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if not self.hostname.startswith(self.bucket_name):
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path = '/%s%s' % (self.bucket_name, path)
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- headers['host'] = self.hostname
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+ headers['host'] = self.hostname if self.port == "80" else f"{self.hostname}:{self.port}"
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self._authorize_request(method, path, headers, subres, query_string)
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@@ -950,6 +985,13 @@ def md5sum_b64(buf):
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return b64encode(hashlib.md5(buf).digest()).decode('ascii')
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+def hmac_sha256(key, msg, hex=False):
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+ d = hmac.new(key, msg, hashlib.sha256)
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+ if hex:
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+ return d.hexdigest()
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+ else:
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+ return d.digest()
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+
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def _parse_retry_after(header):
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'''Parse headers for Retry-After value'''
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