recv.c: Make rn_event_handler() static

[paraslash.git] / crypt.c

diff --git a/crypt.c b/crypt.c
index 34407d782b910cab8f7e87aa269628d9a97aebf3..cf1cabecbad80cdca6d69cf2bbc2165427a84ed8 100644 (file)
--- a/crypt.c
+++ b/crypt.c
@@ -18,15 +18,10 @@
 
 /** \file crypt.c openssl-based RSA encryption/decryption routines */
 
-#include <openssl/pem.h>
 #include "para.h"
 #include "error.h"
 #include "string.h"
-
-/** \cond used to distinguish between loading of private/public key */
-#define LOAD_PUBLIC_KEY 0
-#define LOAD_PRIVATE_KEY 1
-/** \endcond **/
+#include "crypt.h"
 
 static EVP_PKEY *load_key(const char *file, int private)
 {
@@ -46,7 +41,8 @@ static EVP_PKEY *load_key(const char *file, int private)
        return pkey;
 }
 
-static int get_key(char *key_file, RSA **rsa, int private)
+
+int get_rsa_key(char *key_file, RSA **rsa, int private)
 {
        EVP_PKEY *key = load_key(key_file, private);
 
@@ -77,7 +73,7 @@ int para_decrypt_buffer(char *key_file, unsigned char *outbuf, unsigned char *in
                        int rsa_inlen)
 {
        RSA *rsa;
-       int ret = get_key(key_file, &rsa, LOAD_PRIVATE_KEY);
+       int ret = get_rsa_key(key_file, &rsa, LOAD_PRIVATE_KEY);
 
        if (ret < 0)
                return ret;
@@ -100,12 +96,14 @@ int para_decrypt_buffer(char *key_file, unsigned char *outbuf, unsigned char *in
 int para_decrypt_challenge(char *key_file, long unsigned *challenge_nr,
                unsigned char *inbuf, int rsa_inlen)
 {
-       unsigned char *rsa_out = OPENSSL_malloc(128);
+       unsigned char *rsa_out = OPENSSL_malloc(rsa_inlen + 1);
        int ret = para_decrypt_buffer(key_file, rsa_out, inbuf, rsa_inlen);
 
-       if (ret >= 0)
+       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;
 }
@@ -113,7 +111,7 @@ int para_decrypt_challenge(char *key_file, long unsigned *challenge_nr,
 /**
  * encrypt a buffer using an RSA key
  *
- * \param key_file full path of the rsa key
+ * \param rsa: public rsa key
  * \param inbuf the input buffer
  * \param len the length of \a inbuf
  * \param outbuf the output buffer
@@ -122,22 +120,18 @@ int para_decrypt_challenge(char *key_file, long unsigned *challenge_nr,
  *
  * \sa RSA_public_encrypt(3)
  */
-int para_encrypt_buffer(char *key_file, unsigned char *inbuf,
+int para_encrypt_buffer(RSA *rsa, unsigned char *inbuf,
                const unsigned len, unsigned char *outbuf)
 {
-       RSA *rsa;
-       int ret = get_key(key_file, &rsa, LOAD_PUBLIC_KEY);
-
-       if (ret < 0)
-               return ret;
-       ret = RSA_public_encrypt(len, inbuf, outbuf, rsa, RSA_PKCS1_PADDING);
+       int ret = RSA_public_encrypt(len, inbuf, outbuf, rsa,
+               RSA_PKCS1_PADDING);
        return ret < 0?  -E_ENCRYPT : ret;
 }
 
 /**
  * encrypt the given challenge number
  *
- * \param key_file full path of the rsa key
+ * \param rsa: public rsa key
  * \param challenge_nr the number to be encrypted
  * \param outbuf the output buffer
  *
@@ -148,11 +142,11 @@ int para_encrypt_buffer(char *key_file, unsigned char *inbuf,
  * \sa para_encrypt_buffer()
  *
  */
-int para_encrypt_challenge(char *key_file, long unsigned challenge_nr,
+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(key_file, inbuf, strlen((char *)inbuf), outbuf);
+       int ret = para_encrypt_buffer(rsa, inbuf, strlen((char *)inbuf), outbuf);
        free(inbuf);
        return ret;
 }