1 files changed, 48 insertions, 0 deletions
diff --git a/src/lib-dcrypt/istream-decrypt.h b/src/lib-dcrypt/istream-decrypt.h
new file mode 100644
index 0000000..d531c00
--- /dev/null
+++ b/src/lib-dcrypt/istream-decrypt.h
@@ -0,0 +1,48 @@
+#ifndef ISTREAM_DECRYPT_H
+#define ISTREAM_DECRYPT_H
+
+struct dcrypt_private_key;
+struct dcrypt_context_symmetric;
+
+enum decrypt_istream_format {
+	DECRYPT_FORMAT_V1,
+	DECRYPT_FORMAT_V2
+};
+
+/* Look for a private key for a specified public key digest and set it to
+   priv_key_r. Returns 1 if ok, 0 if key doesn't exist, -1 on internal error.
+
+   Note that the private key will be unreferenced when the istream is
+   destroyed. If the callback is returning a persistent key, it must reference
+   the key first. (This is required, because otherwise a key newly created by
+   the callback couldn't be automatically freed.) */
+typedef int
+i_stream_decrypt_get_key_callback_t(const char *pubkey_digest,
+				    struct dcrypt_private_key **priv_key_r,
+				    const char **error_r, void *context);
+
+struct istream *
+i_stream_create_decrypt(struct istream *input,
+			struct dcrypt_private_key *priv_key);
+
+/* create stream for reading plain encrypted data with no header or MAC.
+   do not call dcrypt_ctx_sym_init
+ */
+struct istream *
+i_stream_create_sym_decrypt(struct istream *input,
+			    struct dcrypt_context_symmetric *ctx);
+
+
+/* Decrypt the istream. When a private key is needed, the callback will be
+   called. This allows using multiple private keys for different mails. */
+struct istream *
+i_stream_create_decrypt_callback(struct istream *input,
+				 i_stream_decrypt_get_key_callback_t *callback,
+				 void *context);
+
+enum decrypt_istream_format
+i_stream_encrypt_get_format(const struct istream *input);
+enum io_stream_encrypt_flags
+i_stream_encrypt_get_flags(const struct istream *input);
+
+#endif