audiod: Fix error checking in init_default_filters().

[paraslash.git] / crypt.c

diff --git a/crypt.c b/crypt.c
deleted file mode 100644 (file)
index 6d39453..0000000
--- a/crypt.c
+++ /dev/null
@@ -1,172 +0,0 @@
-/*
- * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
-
-/** \file crypt.c openssl-based RSA encryption/decryption routines */
-
-#include "para.h"
-#include "error.h"
-#include "string.h"
-#include "crypt.h"
-
-static EVP_PKEY *load_key(const char *file, int private)
-{
-       BIO *key;
-       EVP_PKEY *pkey = NULL;
-
-       key = BIO_new(BIO_s_file());
-       if (!key)
-               return NULL;
-       if (BIO_read_filename(key, file) > 0) {
-               if (private == LOAD_PRIVATE_KEY)
-                       pkey = PEM_read_bio_PrivateKey(key, NULL, NULL, NULL);
-               else
-                       pkey = PEM_read_bio_PUBKEY(key, NULL, NULL, NULL);
-       }
-       BIO_free(key);
-       return pkey;
-}
-
-/**
- * read an RSA key from a file
- *
- * \param key_file the file containing the key
- * \param rsa RSA structure is returned here
- * \param private if non-zero, read the private key, otherwise the public key
- *
- * \return The size of the RSA key on success, negative on errors.
- *
- * \sa openssl(1), rsa(1).
- */
-int get_rsa_key(char *key_file, RSA **rsa, int private)
-{
-       EVP_PKEY *key = load_key(key_file, private);
-
-       if (!key)
-               return (private == LOAD_PRIVATE_KEY)? -E_PRIVATE_KEY
-                       : -E_PUBLIC_KEY;
-       *rsa = EVP_PKEY_get1_RSA(key);
-       EVP_PKEY_free(key);
-       if (!*rsa)
-               return -E_RSA;
-       return RSA_size(*rsa);
-}
-
-/**
- * free an RSA structure
- *
- * \param rsa pointer to the RSA struct to free
- *
- * This must be called for any key obtained by get_rsa_key().
- */
-void rsa_free(RSA *rsa)
-{
-       if (rsa)
-               RSA_free(rsa);
-}
-
-/**
- * decrypt a buffer using an RSA key
- *
- * \param key_file full path of the rsa key
- * \param outbuf the output buffer
- * \param inbuf the encrypted input buffer
- * \param rsa_inlen the length of \a inbuf
- *
- * The \a outbuf must be large enough to hold at least \a rsa_inlen bytes.
- *
- * \return The size of the recovered plaintext on success, negative on errors.
- *
- * \sa RSA_private_decrypt(3)
- **/
-int para_decrypt_buffer(char *key_file, unsigned char *outbuf, unsigned char *inbuf,
-                       unsigned rsa_inlen)
-{
-       RSA *rsa;
-       int ret, inlen = rsa_inlen;
-
-       if (inlen < 0)
-               return -E_RSA;
-       ret = get_rsa_key(key_file, &rsa, LOAD_PRIVATE_KEY);
-       if (ret < 0)
-               return ret;
-       ret = RSA_private_decrypt(inlen, inbuf, outbuf, rsa, RSA_PKCS1_PADDING);
-       rsa_free(rsa);
-       return (ret > 0)? ret : -E_DECRYPT;
-}
-
-/**
- * decrypt the challenge number sent by para_server
- *
- * \param key_file full path of the rsa key
- * \param challenge_nr result is stored here
- * \param inbuf the input buffer
- * \param rsa_inlen the length of \a inbuf
- *
- * \return positive on success, negative on errors
- *
- * \sa para_decrypt_buffer()
- */
-int para_decrypt_challenge(char *key_file, long unsigned *challenge_nr,
-               unsigned char *inbuf, unsigned rsa_inlen)
-{
-       unsigned char *rsa_out = OPENSSL_malloc(rsa_inlen + 1);
-       int ret = para_decrypt_buffer(key_file, rsa_out, inbuf, rsa_inlen);
-
-       if (ret >= 0) {
-               rsa_out[ret] = '\0';
-               ret = sscanf((char *)rsa_out, "%lu", challenge_nr) == 1?
-                       1 : -E_CHALLENGE;
-       }
-       OPENSSL_free(rsa_out);
-       return ret;
-}
-
-/**
- * encrypt a buffer using an RSA key
- *
- * \param rsa: public rsa key
- * \param inbuf the input buffer
- * \param len the length of \a inbuf
- * \param outbuf the output buffer
- *
- * \return The size of the encrypted data on success, negative on errors
- *
- * \sa RSA_public_encrypt(3)
- */
-int para_encrypt_buffer(RSA *rsa, unsigned char *inbuf,
-               unsigned len, unsigned char *outbuf)
-{
-       int ret, flen = len; /* RSA_public_encrypt expects a signed int */
-
-       if (flen < 0)
-               return -E_ENCRYPT;
-       ret = RSA_public_encrypt(flen, inbuf, outbuf, rsa, RSA_PKCS1_PADDING);
-       return ret < 0?  -E_ENCRYPT : ret;
-}
-
-/**
- * encrypt the given challenge number
- *
- * \param rsa: public rsa key
- * \param challenge_nr the number to be encrypted
- * \param outbuf the output buffer
- *
- * \a outbuf must be at least 64 bytes long
- *
- * \return The size of the encrypted data on success, negative on errors
- *
- * \sa para_encrypt_buffer()
- *
- */
-int para_encrypt_challenge(RSA* rsa, long unsigned challenge_nr,
-       unsigned char *outbuf)
-{
-       unsigned char *inbuf = (unsigned char*) make_message("%lu", challenge_nr);
-       int ret = para_encrypt_buffer(rsa, inbuf, strlen((char *)inbuf), outbuf);
-       free(inbuf);
-       return ret;
-}
-