Module for password encryption.

bzr revid: hda@tinyerp.com-20080528030338-7izwvtmmmizg9sp5

1 files changed, 173 insertions, 0 deletions

diff --git a/addons/base_crypt/crypt.py b/addons/base_crypt/crypt.py
new file mode 100644
index 00000000000..1d461463a27
--- /dev/null
+++ b/addons/base_crypt/crypt.py
@@ -0,0 +1,173 @@
+from random import seed, sample
+from string import letters, digits
+from osv import fields,osv
+import pooler
+import tools
+from service import security
+
+magic_md5 = '$1$'
+
+def gen_salt( length=8, symbols=letters + digits ):
+    seed()
+    return ''.join( sample( symbols, length ) )
+
+import md5
+
+def encrypt_md5( raw_pw, salt, magic=magic_md5 ):
+    hash = md5.new( raw_pw + magic + salt )
+    stretch = md5.new( raw_pw + salt + raw_pw).digest()
+
+    for i in range( 0, len( raw_pw ) ):
+        hash.update( stretch[i % 16] )
+
+    i = len( raw_pw )
+
+    while i:
+        if i & 1:
+            hash.update('\x00')
+        else:
+            hash.update( raw_pw[0] )
+        i >>= 1
+
+    saltedmd5 = hash.digest()
+
+    for i in range( 1000 ):
+        hash = md5.new()
+
+        if i & 1:
+            hash.update( raw_pw )
+        else:
+            hash.update( saltedmd5 )
+
+        if i % 3:
+            hash.update( salt )
+        if i % 7:
+            hash.update( raw_pw )
+        if i & 1:
+            hash.update( saltedmd5 )
+        else:
+            hash.update( raw_pw )
+
+        saltedmd5 = hash.digest()
+
+    itoa64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
+
+    rearranged = ''
+    for a, b, c in ((0, 6, 12), (1, 7, 13), (2, 8, 14), (3, 9, 15), (4, 10, 5)):
+        v = ord( saltedmd5[a] ) << 16 | ord( saltedmd5[b] ) << 8 | ord( saltedmd5[c] )
+
+        for i in range(4):
+            rearranged += itoa64[v & 0x3f]
+            v >>= 6
+
+    v = ord( saltedmd5[11] )
+
+    for i in range( 2 ):
+        rearranged += itoa64[v & 0x3f]
+        v >>= 6
+
+    return magic + salt + '$' + rearranged
+
+_salt_cache = {}
+
+def login(db, login, password):
+    cr = pooler.get_db(db).cursor()
+    cr.execute( 'select password from res_users where login=%s', (login.encode( 'utf-8' ),) )
+    stored_pw = cr.fetchone()
+
+    if stored_pw:
+        stored_pw = stored_pw[0]
+    else:
+        # Return early if no one has a login name like that.
+        return False
+
+    # Calculate a new password ('updated_pw') from 'stored_pw' if the
+    # latter isn't encrypted yet. Use that to update the database entry.
+    # Also update the 'stored_pw' to reflect the change.
+
+    if stored_pw[0:3] != magic_md5:
+        updated_pw = encrypt_md5( stored_pw, gen_salt() )
+        cr.execute( 'update res_users set password=%s where login=%s', (updated_pw.encode( 'utf-8' ), login.encode( 'utf-8' ),) )
+        cr.commit()
+
+        cr.execute( 'select password from res_users where login=%s', (login.encode( 'utf-8' ),) )
+        stored_pw = cr.fetchone()[0]
+
+    # Calculate an encrypted password from the user-provided
+    # password ('encrypted_pw').
+
+    salt = _salt_cache[password] = stored_pw[3:11]
+    encrypted_pw = encrypt_md5( password, salt )
+
+    # Retrieve a user id from the database, factoring in an encrypted
+    # password.
+
+    cr.execute('select id from res_users where login=%s and password=%s and active', (login.encode('utf-8'), encrypted_pw.encode('utf-8')))
+    res = cr.fetchone()
+    cr.close()
+
+    if res:
+        return res[0]
+    else:
+        return False
+
+#def check_super(passwd):
+#    salt = _salt_cache[passwd]
+#    if encrypt_md5( passwd, salt ) == tools.config['admin_passwd']:
+#         return True
+#    else:
+#         raise Exception('AccessDenied')
+
+def check(db, uid, passwd):
+    if security._uid_cache.has_key( uid ) and (security._uid_cache[uid]==passwd):
+        return True
+    cr = pooler.get_db(db).cursor()
+    salt = _salt_cache[passwd]
+    cr.execute(' select count(*) from res_users where id=%d and password=%s', (int(uid), encrypt_md5( passwd, salt )) )
+    res = cr.fetchone()[0]
+    cr.close()
+    if not bool(res):
+        raise Exception('AccessDenied')
+    if res:
+        security._uid_cache[uid] = passwd
+    return bool(res)
+
+
+def access(db, uid, passwd, sec_level, ids):
+    cr = pooler.get_db(db).cursor()
+    salt = _salt_cache[passwd]
+    cr.execute('select id from res_users where id=%s and password=%s', (uid, encrypt_md5( passwd, salt )) )
+    res = cr.fetchone()
+    cr.close()
+    if not res:
+        raise Exception('Bad username or password')
+    return res[0]
+
+# check if module is installed or not
+security.login=login
+#security.check_super=check_super
+security.access=access
+security.check=check
+
+class users(osv.osv):
+    _name="res.users"
+    _inherit="res.users"
+    # agi - 022108
+    # Add handlers for 'input_pw' field.
+
+    def set_pw( self, cr, uid, id, name, value, args, context ):
+        self.write( cr, uid, id, { 'password' : encrypt_md5( value, gen_salt() ) } )
+        del value
+
+    def get_pw( self, cr, uid, ids, name, args, context ):
+        res = {}
+        for id in ids:
+            res[id] = ''
+        return res
+
+    # Continuing to original code.
+
+    _columns = {
+        'input_pw': fields.function( get_pw, fnct_inv=set_pw, type='char', method=True, size=20, string='Password', invisible=True),
+            }
+users()
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