X-Git-Url: http://wagner.pp.ru/gitweb/?a=blobdiff_plain;f=ctypescrypto%2Fbio.py;fp=ctypescrypto%2Fbio.py;h=1263ce64dc12a305924a0ce8dedb6a309b1d0a73;hb=1ff9b1899959673512927b6afa317855908b7073;hp=0000000000000000000000000000000000000000;hpb=7b229d0dba6fc42eddf3c359c3d9510330a1eeaf;p=oss%2Fctypescrypto.git

diff --git a/ctypescrypto/bio.py b/ctypescrypto/bio.py
new file mode 100644
index 0000000..1263ce6
--- /dev/null
+++ b/ctypescrypto/bio.py
@@ -0,0 +1,30 @@
+from ctypescrypto import libcrypto
+from ctypes import c_char_p, c_int, string_at
+class Membio:
+	""" 
+		Provides interface to OpenSSL memory bios 
+		use str() to get contents of writable bio
+		use bio member to pass to libcrypto function
+	"""
+	def __init__(self,data=None):
+		""" If data is specified, creates read-only BIO. If data is
+			None, creates writable BIO
+		"""
+		if data is None:
+			method=libcrypto.BIO_s_mem()
+			self.bio=libcrypto.BIO_new(method)
+		else:
+			self.bio=libcrypto.BIO_new_mem_buf(c_char_p(data),len(data))q
+	def __del__(self):
+		libcrypto.BIO_free(self.bio)
+		del(self.bio)
+	def __str__(self):
+		p=c_char_p(None)
+		l=BIO_get_mem_data(self.bio,byref(p))
+		return string_at(p,l)
+#FIXME TODO - BIO should have stream-like interface
+libcrypto.BIO_s_mem.restype=c_void_p
+libcrypto.BIO_new.restype=c_void_p
+libcrypto.BIO_new.argtypes=(c_void_p,)
+libcrypto.BIO_get_mem_data.restype=c_long
+libcrypto.BIO_get_mem_data.argtypes=(c_void_p,POINTER(c_char_p))