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Name	Size	Permission
__init__.py	1.51 KB	-rw-r--r--
_compat.py	4.24 KB	-rw-r--r--
asn1.py	1.74 KB	-rw-r--r--
cli.py	8.99 KB	-rw-r--r--
common.py	4.46 KB	-rw-r--r--
core.py	1.62 KB	-rw-r--r--
key.py	23.96 KB	-rw-r--r--
machine_size.py	2.3 KB	-rw-r--r--
parallel.py	2.27 KB	-rw-r--r--
pem.py	3.48 KB	-rw-r--r--
pkcs1.py	14.35 KB	-rw-r--r--
pkcs1_v2.py	3.38 KB	-rw-r--r--
prime.py	4.95 KB	-rw-r--r--
randnum.py	2.58 KB	-rw-r--r--
transform.py	6.44 KB	-rw-r--r--
util.py	2.99 KB	-rw-r--r--

Code Editor : pem.py

# -*- coding: utf-8 -*-
#
#  Copyright 2011 Sybren A. Stüvel <sybren@stuvel.eu>
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      https://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

"""Functions that load and write PEM-encoded files."""

import base64

from rsa._compat import is_bytes, range

def _markers(pem_marker):
    """
    Returns the start and end PEM markers, as bytes.
    """

if not is_bytes(pem_marker):
        pem_marker = pem_marker.encode('ascii')

return (b'-----BEGIN ' + pem_marker + b'-----',
            b'-----END ' + pem_marker + b'-----')

def load_pem(contents, pem_marker):
    """Loads a PEM file.

:param contents: the contents of the file to interpret
    :param pem_marker: the marker of the PEM content, such as 'RSA PRIVATE KEY'
        when your file has '-----BEGIN RSA PRIVATE KEY-----' and
        '-----END RSA PRIVATE KEY-----' markers.

:return: the base64-decoded content between the start and end markers.

@raise ValueError: when the content is invalid, for example when the start
        marker cannot be found.

"""

# We want bytes, not text. If it's text, it can be converted to ASCII bytes.
    if not is_bytes(contents):
        contents = contents.encode('ascii')

(pem_start, pem_end) = _markers(pem_marker)

pem_lines = []
    in_pem_part = False

for line in contents.splitlines():
        line = line.strip()

# Skip empty lines
        if not line:
            continue

# Handle start marker
        if line == pem_start:
            if in_pem_part:
                raise ValueError('Seen start marker "%s" twice' % pem_start)

in_pem_part = True
            continue

# Skip stuff before first marker
        if not in_pem_part:
            continue

# Handle end marker
        if in_pem_part and line == pem_end:
            in_pem_part = False
            break

# Load fields
        if b':' in line:
            continue

pem_lines.append(line)

# Do some sanity checks
    if not pem_lines:
        raise ValueError('No PEM start marker "%s" found' % pem_start)

if in_pem_part:
        raise ValueError('No PEM end marker "%s" found' % pem_end)

# Base64-decode the contents
    pem = b''.join(pem_lines)
    return base64.standard_b64decode(pem)

def save_pem(contents, pem_marker):
    """Saves a PEM file.

:param contents: the contents to encode in PEM format
    :param pem_marker: the marker of the PEM content, such as 'RSA PRIVATE KEY'
        when your file has '-----BEGIN RSA PRIVATE KEY-----' and
        '-----END RSA PRIVATE KEY-----' markers.

:return: the base64-encoded content between the start and end markers, as bytes.

"""

(pem_start, pem_end) = _markers(pem_marker)

b64 = base64.standard_b64encode(contents).replace(b'\n', b'')
    pem_lines = [pem_start]

for block_start in range(0, len(b64), 64):
        block = b64[block_start:block_start + 64]
        pem_lines.append(block)

pem_lines.append(pem_end)
    pem_lines.append(b'')

return b'\n'.join(pem_lines)

${this.title}

Code Editor : pem.py