def b64encode(s, altchars=None):
"""Encode a byte string using Base64.
s is the byte string to encode. Optional altchars must be a byte
string of length 2 which specifies an alternative alphabet for the
'+' and '/' characters. This allows an application to
e.g. generate url or filesystem safe Base64 strings.
The encoded byte string is returned.
"""
if not isinstance(s, bytes_types):
raise TypeError("expected bytes, not %s" % s.__class__.__name__)
# Strip off the trailing newline
encoded = binascii.b2a_base64(s)[:-1]
if altchars is not None:
if not isinstance(altchars, bytes_types):
raise TypeError("expected bytes, not %s"
% altchars.__class__.__name__)
assert len(altchars) == 2, repr(altchars)
return encoded.translate(bytes.maketrans(b'+/', altchars))
return encoded
python类b2a_base64()的实例源码
def _oauth_signature(consumer_token, method, url, parameters={}, token=None):
"""Calculates the HMAC-SHA1 OAuth signature for the given request.
See http://oauth.net/core/1.0/#signing_process
"""
parts = urlparse.urlparse(url)
scheme, netloc, path = parts[:3]
normalized_url = scheme.lower() + "://" + netloc.lower() + path
base_elems = []
base_elems.append(method.upper())
base_elems.append(normalized_url)
base_elems.append("&".join("%s=%s" % (k, _oauth_escape(str(v)))
for k, v in sorted(parameters.items())))
base_string = "&".join(_oauth_escape(e) for e in base_elems)
key_elems = [escape.utf8(consumer_token["secret"])]
key_elems.append(escape.utf8(token["secret"] if token else ""))
key = b("&").join(key_elems)
hash = hmac.new(key, escape.utf8(base_string), hashlib.sha1)
return binascii.b2a_base64(hash.digest())[:-1]
def _oauth10a_signature(consumer_token, method, url, parameters={}, token=None):
"""Calculates the HMAC-SHA1 OAuth 1.0a signature for the given request.
See http://oauth.net/core/1.0a/#signing_process
"""
parts = urlparse.urlparse(url)
scheme, netloc, path = parts[:3]
normalized_url = scheme.lower() + "://" + netloc.lower() + path
base_elems = []
base_elems.append(method.upper())
base_elems.append(normalized_url)
base_elems.append("&".join("%s=%s" % (k, _oauth_escape(str(v)))
for k, v in sorted(parameters.items())))
base_string = "&".join(_oauth_escape(e) for e in base_elems)
key_elems = [escape.utf8(urllib.quote(consumer_token["secret"], safe='~'))]
key_elems.append(escape.utf8(urllib.quote(token["secret"], safe='~') if token else ""))
key = b("&").join(key_elems)
hash = hmac.new(key, escape.utf8(base_string), hashlib.sha1)
return binascii.b2a_base64(hash.digest())[:-1]
def sign_rsa_sha1(base_string, rsa_private_key):
"""**RSA-SHA1**
Per `section 3.4.3`_ of the spec.
The "RSA-SHA1" signature method uses the RSASSA-PKCS1-v1_5 signature
algorithm as defined in `RFC3447, Section 8.2`_ (also known as
PKCS#1), using SHA-1 as the hash function for EMSA-PKCS1-v1_5. To
use this method, the client MUST have established client credentials
with the server that included its RSA public key (in a manner that is
beyond the scope of this specification).
.. _`section 3.4.3`: http://tools.ietf.org/html/rfc5849#section-3.4.3
.. _`RFC3447, Section 8.2`: http://tools.ietf.org/html/rfc3447#section-8.2
"""
if isinstance(base_string, unicode_type):
base_string = base_string.encode('utf-8')
# TODO: finish RSA documentation
alg = _jwt_rs1_signing_algorithm()
key = _prepare_key_plus(alg, rsa_private_key)
s=alg.sign(base_string, key)
return binascii.b2a_base64(s)[:-1].decode('utf-8')
def body_encode(s, maxlinelen=76, eol=NL):
r"""Encode a string with base64.
Each line will be wrapped at, at most, maxlinelen characters (defaults to
76 characters).
Each line of encoded text will end with eol, which defaults to "\n". Set
this to "\r\n" if you will be using the result of this function directly
in an email.
"""
if not s:
return s
encvec = []
max_unencoded = maxlinelen * 3 // 4
for i in range(0, len(s), max_unencoded):
# BAW: should encode() inherit b2a_base64()'s dubious behavior in
# adding a newline to the encoded string?
enc = b2a_base64(s[i:i + max_unencoded]).decode("ascii")
if enc.endswith(NL) and eol != NL:
enc = enc[:-1] + eol
encvec.append(enc)
return EMPTYSTRING.join(encvec)
def encode(self, inp):
#
# Invoke binascii.b2a_base64 iteratively with
# short even length buffers, strip the trailing
# line feed from the result and append. "Even"
# means a number that factors to both 6 and 8,
# so when it gets to the end of the 8-bit input
# there's no partial 6-bit output.
#
oup = ''
while inp:
if len(inp) > 48:
t = inp[:48]
inp = inp[48:]
else:
t = inp
inp = ''
e = binascii.b2a_base64(t)
if e:
oup = oup + e[:-1]
return oup
def _oauth_signature(consumer_token, method, url, parameters={}, token=None):
"""Calculates the HMAC-SHA1 OAuth signature for the given request.
See http://oauth.net/core/1.0/#signing_process
"""
parts = urlparse.urlparse(url)
scheme, netloc, path = parts[:3]
normalized_url = scheme.lower() + "://" + netloc.lower() + path
base_elems = []
base_elems.append(method.upper())
base_elems.append(normalized_url)
base_elems.append("&".join("%s=%s" % (k, _oauth_escape(str(v)))
for k, v in sorted(parameters.items())))
base_string = "&".join(_oauth_escape(e) for e in base_elems)
key_elems = [consumer_token["secret"]]
key_elems.append(token["secret"] if token else "")
key = "&".join(key_elems)
hash = hmac.new(key, base_string, hashlib.sha1)
return binascii.b2a_base64(hash.digest())[:-1]
def _oauth_signature(consumer_token, method, url, parameters={}, token=None):
"""Calculates the HMAC-SHA1 OAuth signature for the given request.
See http://oauth.net/core/1.0/#signing_process
"""
parts = urlparse.urlparse(url)
scheme, netloc, path = parts[:3]
normalized_url = scheme.lower() + "://" + netloc.lower() + path
base_elems = []
base_elems.append(method.upper())
base_elems.append(normalized_url)
base_elems.append("&".join("%s=%s" % (k, _oauth_escape(str(v)))
for k, v in sorted(parameters.items())))
base_string = "&".join(_oauth_escape(e) for e in base_elems)
key_elems = [escape.utf8(consumer_token["secret"])]
key_elems.append(escape.utf8(token["secret"] if token else ""))
key = b"&".join(key_elems)
hash = hmac.new(key, escape.utf8(base_string), hashlib.sha1)
return binascii.b2a_base64(hash.digest())[:-1]
def _oauth10a_signature(consumer_token, method, url, parameters={}, token=None):
"""Calculates the HMAC-SHA1 OAuth 1.0a signature for the given request.
See http://oauth.net/core/1.0a/#signing_process
"""
parts = urlparse.urlparse(url)
scheme, netloc, path = parts[:3]
normalized_url = scheme.lower() + "://" + netloc.lower() + path
base_elems = []
base_elems.append(method.upper())
base_elems.append(normalized_url)
base_elems.append("&".join("%s=%s" % (k, _oauth_escape(str(v)))
for k, v in sorted(parameters.items())))
base_string = "&".join(_oauth_escape(e) for e in base_elems)
key_elems = [escape.utf8(urllib_parse.quote(consumer_token["secret"], safe='~'))]
key_elems.append(escape.utf8(urllib_parse.quote(token["secret"], safe='~') if token else ""))
key = b"&".join(key_elems)
hash = hmac.new(key, escape.utf8(base_string), hashlib.sha1)
return binascii.b2a_base64(hash.digest())[:-1]
def _oauth_signature(consumer_token, method, url, parameters={}, token=None):
"""Calculates the HMAC-SHA1 OAuth signature for the given request.
See http://oauth.net/core/1.0/#signing_process
"""
parts = urlparse.urlparse(url)
scheme, netloc, path = parts[:3]
normalized_url = scheme.lower() + "://" + netloc.lower() + path
base_elems = []
base_elems.append(method.upper())
base_elems.append(normalized_url)
base_elems.append("&".join("%s=%s" % (k, _oauth_escape(str(v)))
for k, v in sorted(parameters.items())))
base_string = "&".join(_oauth_escape(e) for e in base_elems)
key_elems = [escape.utf8(consumer_token["secret"])]
key_elems.append(escape.utf8(token["secret"] if token else ""))
key = b"&".join(key_elems)
hash = hmac.new(key, escape.utf8(base_string), hashlib.sha1)
return binascii.b2a_base64(hash.digest())[:-1]
def _oauth10a_signature(consumer_token, method, url, parameters={}, token=None):
"""Calculates the HMAC-SHA1 OAuth 1.0a signature for the given request.
See http://oauth.net/core/1.0a/#signing_process
"""
parts = urlparse.urlparse(url)
scheme, netloc, path = parts[:3]
normalized_url = scheme.lower() + "://" + netloc.lower() + path
base_elems = []
base_elems.append(method.upper())
base_elems.append(normalized_url)
base_elems.append("&".join("%s=%s" % (k, _oauth_escape(str(v)))
for k, v in sorted(parameters.items())))
base_string = "&".join(_oauth_escape(e) for e in base_elems)
key_elems = [escape.utf8(urllib_parse.quote(consumer_token["secret"], safe='~'))]
key_elems.append(escape.utf8(urllib_parse.quote(token["secret"], safe='~') if token else ""))
key = b"&".join(key_elems)
hash = hmac.new(key, escape.utf8(base_string), hashlib.sha1)
return binascii.b2a_base64(hash.digest())[:-1]
def _oauth10a_signature(consumer_token, method, url, parameters={}, token=None):
"""Calculates the HMAC-SHA1 OAuth 1.0a signature for the given request.
See http://oauth.net/core/1.0a/#signing_process
"""
parts = urlparse.urlparse(url)
scheme, netloc, path = parts[:3]
normalized_url = scheme.lower() + "://" + netloc.lower() + path
base_elems = []
base_elems.append(method.upper())
base_elems.append(normalized_url)
base_elems.append("&".join("%s=%s" % (k, _oauth_escape(str(v)))
for k, v in sorted(parameters.items())))
base_string = "&".join(_oauth_escape(e) for e in base_elems)
key_elems = [escape.utf8(urllib_parse.quote(consumer_token["secret"], safe='~'))]
key_elems.append(escape.utf8(urllib_parse.quote(token["secret"], safe='~') if token else ""))
key = b"&".join(key_elems)
hash = hmac.new(key, escape.utf8(base_string), hashlib.sha1)
return binascii.b2a_base64(hash.digest())[:-1]
def build_signature(self, oauth_request, consumer, token):
key, base_string = self.build_signature_base_string(oauth_request,
consumer,
token)
# Fetch the private key cert based on the request
cert = self._fetch_private_cert(oauth_request)
# Pull the private key from the certificate
privatekey = keyfactory.parsePrivateKey(cert)
# Convert base_string to bytes
#base_string_bytes = cryptomath.createByteArraySequence(base_string)
# Sign using the key
signed = privatekey.hashAndSign(base_string)
return binascii.b2a_base64(signed)[:-1]
def body_encode(s, maxlinelen=76, eol=NL):
r"""Encode a string with base64.
Each line will be wrapped at, at most, maxlinelen characters (defaults to
76 characters).
Each line of encoded text will end with eol, which defaults to "\n". Set
this to "\r\n" if you will be using the result of this function directly
in an email.
"""
if not s:
return s
encvec = []
max_unencoded = maxlinelen * 3 // 4
for i in range(0, len(s), max_unencoded):
# BAW: should encode() inherit b2a_base64()'s dubious behavior in
# adding a newline to the encoded string?
enc = b2a_base64(s[i:i + max_unencoded]).decode("ascii")
if enc.endswith(NL) and eol != NL:
enc = enc[:-1] + eol
encvec.append(enc)
return EMPTYSTRING.join(encvec)
def _oauth_signature(consumer_token, method, url, parameters={}, token=None):
"""Calculates the HMAC-SHA1 OAuth signature for the given request.
See http://oauth.net/core/1.0/#signing_process
"""
parts = urlparse.urlparse(url)
scheme, netloc, path = parts[:3]
normalized_url = scheme.lower() + "://" + netloc.lower() + path
base_elems = []
base_elems.append(method.upper())
base_elems.append(normalized_url)
base_elems.append("&".join("%s=%s" % (k, _oauth_escape(str(v)))
for k, v in sorted(parameters.items())))
base_string = "&".join(_oauth_escape(e) for e in base_elems)
key_elems = [escape.utf8(consumer_token["secret"])]
key_elems.append(escape.utf8(token["secret"] if token else ""))
key = b("&").join(key_elems)
hash = hmac.new(key, escape.utf8(base_string), hashlib.sha1)
return binascii.b2a_base64(hash.digest())[:-1]
def _oauth10a_signature(consumer_token, method, url, parameters={}, token=None):
"""Calculates the HMAC-SHA1 OAuth 1.0a signature for the given request.
See http://oauth.net/core/1.0a/#signing_process
"""
parts = urlparse.urlparse(url)
scheme, netloc, path = parts[:3]
normalized_url = scheme.lower() + "://" + netloc.lower() + path
base_elems = []
base_elems.append(method.upper())
base_elems.append(normalized_url)
base_elems.append("&".join("%s=%s" % (k, _oauth_escape(str(v)))
for k, v in sorted(parameters.items())))
base_string = "&".join(_oauth_escape(e) for e in base_elems)
key_elems = [escape.utf8(urllib.quote(consumer_token["secret"], safe='~'))]
key_elems.append(escape.utf8(urllib.quote(token["secret"], safe='~') if token else ""))
key = b("&").join(key_elems)
hash = hmac.new(key, escape.utf8(base_string), hashlib.sha1)
return binascii.b2a_base64(hash.digest())[:-1]
def encode(cls, v):
"""Return the given header name or value, encoded for HTTP output."""
for enc in cls.encodings:
try:
return v.encode(enc)
except UnicodeEncodeError:
continue
if cls.protocol == (1, 1) and cls.use_rfc_2047:
# Encode RFC-2047 TEXT
# (e.g. u"\u8200" -> "=?utf-8?b?6IiA?=").
# We do our own here instead of using the email module
# because we never want to fold lines--folding has
# been deprecated by the HTTP working group.
v = b2a_base64(v.encode('utf-8'))
return (ntob('=?utf-8?b?') + v.strip(ntob('\n')) + ntob('?='))
raise ValueError('Could not encode header part %r using '
'any of the encodings %r.' %
(v, cls.encodings))
def body_encode(s, maxlinelen=76, eol=NL):
r"""Encode a string with base64.
Each line will be wrapped at, at most, maxlinelen characters (defaults to
76 characters).
Each line of encoded text will end with eol, which defaults to "\n". Set
this to "\r\n" if you will be using the result of this function directly
in an email.
"""
if not s:
return s
encvec = []
max_unencoded = maxlinelen * 3 // 4
for i in range(0, len(s), max_unencoded):
# BAW: should encode() inherit b2a_base64()'s dubious behavior in
# adding a newline to the encoded string?
enc = b2a_base64(s[i:i + max_unencoded]).decode("ascii")
if enc.endswith(NL) and eol != NL:
enc = enc[:-1] + eol
encvec.append(enc)
return EMPTYSTRING.join(encvec)
def b64encode(s, altchars=None):
"""Encode a byte string using Base64.
s is the byte string to encode. Optional altchars must be a byte
string of length 2 which specifies an alternative alphabet for the
'+' and '/' characters. This allows an application to
e.g. generate url or filesystem safe Base64 strings.
The encoded byte string is returned.
"""
# Strip off the trailing newline
encoded = binascii.b2a_base64(s)[:-1]
if altchars is not None:
assert len(altchars) == 2, repr(altchars)
return encoded.translate(bytes.maketrans(b'+/', altchars))
return encoded
def build_signature(self, oauth_request, consumer, token):
key, base_string = self.build_signature_base_string(oauth_request,
consumer,
token)
# Fetch the private key cert based on the request
cert = self._fetch_private_cert(oauth_request)
# Pull the private key from the certificate
privatekey = keyfactory.parsePrivateKey(cert)
# Convert base_string to bytes
# base_string_bytes = cryptomath.createByteArraySequence(base_string)
# Sign using the key
signed = privatekey.hashAndSign(base_string)
return binascii.b2a_base64(signed)[:-1]
