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added the gcrypt patch (without gcrypt as default library).

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still needs tests.


git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@38 7dcaeef0-15fb-0310-b436-a5af3365683c
This commit is contained in:
Aris Adamantiadis
2005-10-04 22:11:19 +00:00
parent c0525750fd
commit 5f7c84f900
29 changed files with 1338 additions and 187 deletions
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28
libssh/crypt.c
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@@ -22,11 +22,14 @@ MA 02111-1307, USA. */
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef OPENSSL_CRYPTO
#include <openssl/blowfish.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#endif
#include <netdb.h>
#include "libssh/priv.h"
@@ -45,25 +48,34 @@ int packet_decrypt(SSH_SESSION *session, void *data,u32 len){
struct crypto_struct *crypto=session->current_crypto->in_cipher;
char *out=malloc(len);
ssh_say(3,"Decrypting %d bytes data\n",len);
#ifdef HAVE_LIBGCRYPT
crypto->set_decrypt_key(crypto,session->current_crypto->decryptkey,session->current_crypto->decryptIV);
crypto->cbc_decrypt(crypto,data,out,len);
#elif defined HAVE_LIBCRYPTO
crypto->set_decrypt_key(crypto,session->current_crypto->decryptkey);
crypto->cbc_decrypt(crypto,data,out,len,session->current_crypto->decryptIV);
#endif
memcpy(data,out,len);
memset(out,0,len);
free(out);
return 0;
}
char * packet_encrypt(SSH_SESSION *session,void *data,u32 len){
unsigned char * packet_encrypt(SSH_SESSION *session,void *data,u32 len){
struct crypto_struct *crypto;
HMAC_CTX *ctx;
HMACCTX ctx;
char *out;
int finallen;
unsigned int finallen;
u32 seq=ntohl(session->send_seq);
if(!session->current_crypto)
return NULL; /* nothing to do here */
crypto= session->current_crypto->out_cipher;
ssh_say(3,"seq num = %d, len = %d\n",session->send_seq,len);
#ifdef HAVE_LIBGCRYPT
crypto->set_encrypt_key(crypto,session->current_crypto->encryptkey,session->current_crypto->encryptIV);
#elif defined HAVE_LIBCRYPTO
crypto->set_encrypt_key(crypto,session->current_crypto->encryptkey);
#endif
out=malloc(len);
if(session->version==2){
ctx=hmac_init(session->current_crypto->encryptMAC,20,HMAC_SHA1);
@@ -77,7 +89,11 @@ char * packet_encrypt(SSH_SESSION *session,void *data,u32 len){
ssh_print_hexa("packet hmac",session->current_crypto->hmacbuf,20);
#endif
}
#ifdef HAVE_LIBGCRYPT
crypto->cbc_encrypt(crypto,data,out,len);
#elif defined HAVE_LIBCRYPTO
crypto->cbc_encrypt(crypto,data,out,len,session->current_crypto->encryptIV);
#endif
memcpy(data,out,len);
memset(out,0,len);
free(out);
@@ -87,10 +103,10 @@ char * packet_encrypt(SSH_SESSION *session,void *data,u32 len){
return NULL;
}
int packet_hmac_verify(SSH_SESSION *session,BUFFER *buffer,char *mac){
HMAC_CTX *ctx;
int packet_hmac_verify(SSH_SESSION *session,BUFFER *buffer,unsigned char *mac){
HMACCTX ctx;
unsigned char hmacbuf[EVP_MAX_MD_SIZE];
int len;
unsigned int len;
u32 seq=htonl(session->recv_seq);
ctx=hmac_init(session->current_crypto->decryptMAC,20,HMAC_SHA1);
hmac_update(ctx,(unsigned char *)&seq,sizeof(u32));