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kex: Add simple DES support for SSHv1.

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This commit is contained in:
Dmitriy Kuznetsov
2012-09-07 12:19:43 +02:00
committed by Andreas Schneider
parent a3f83e7274
commit 320951f42f
7 changed files with 94 additions and 11 deletions
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35
src/libgcrypt.c
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@@ -262,6 +262,17 @@ static void aes_decrypt(struct ssh_cipher_struct *cipher, void *in, void *out,
gcry_cipher_decrypt(cipher->key[0], out, len, in, len);
}
static int des1_set_key(struct ssh_cipher_struct *cipher, void *key){
if(!cipher->key){
if (alloc_key(cipher) < 0) {
return -1;
}
DES_set_odd_parity(key);
DES_set_key_unchecked(key,cipher->key);
}
return 0;
}
static int des3_set_key(struct ssh_cipher_struct *cipher, void *key, void *IV) {
if (cipher->key == NULL) {
if (alloc_key(cipher) < 0) {
@@ -285,6 +296,19 @@ static int des3_set_key(struct ssh_cipher_struct *cipher, void *key, void *IV) {
return 0;
}
static void des1_1_encrypt(struct ssh_cipher_struct *cipher, void *in, void *out,
unsigned long len, void *IV){
DES_ncbc_encrypt(in, out, len, cipher->key, IV, 1);
}
static void des1_1_decrypt(struct ssh_cipher_struct *cipher, void *in, void *out,
unsigned long len, void *IV){
DES_ncbc_encrypt(in,out,len, cipher->key, IV, 0);
}
static void des3_encrypt(struct ssh_cipher_struct *cipher, void *in,
void *out, unsigned long len) {
gcry_cipher_encrypt(cipher->key[0], out, len, in, len);
@@ -461,6 +485,17 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.cbc_encrypt = des3_1_encrypt,
.cbc_decrypt = des3_1_decrypt
},
{
.name = "des-cbc-ssh1",
.blocksize = 8,
.keylen = sizeof(DES_key_schedule),
.key = NULL,
.keysize = 64,
.set_encrypt_key = des1_set_key,
.set_decrypt_key = des1_set_key,
.cbc_encrypt = des1_1_encrypt,
.cbc_decrypt = des1_1_decrypt
},
{
.name = NULL,
.blocksize = 0,