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/*
* Convenience functions to encrypt and decrypt the standard format
* for SSH-1 private key files. This uses triple-DES in SSH-1 style
* (three separate CBC layers), but the same key is used for the first
* and third layers.CBC mode.
*/
#include "ssh.h"
static ssh_cipher *des3_pubkey_cipher(const void *vkey)
{
ssh_cipher *c = ssh_cipher_new(&ssh_3des_ssh1);
uint8_t keys3[24], iv[8];
memcpy(keys3, vkey, 16);
memcpy(keys3 + 16, vkey, 8);
ssh_cipher_setkey(c, keys3);
smemclr(keys3, sizeof(keys3));
memset(iv, 0, 8);
ssh_cipher_setiv(c, iv);
return c;
}
void des3_decrypt_pubkey(const void *vkey, void *vblk, int len)
{
ssh_cipher *c = des3_pubkey_cipher(vkey);
ssh_cipher_decrypt(c, vblk, len);
ssh_cipher_free(c);
}
void des3_encrypt_pubkey(const void *vkey, void *vblk, int len)
{
ssh_cipher *c = des3_pubkey_cipher(vkey);
ssh_cipher_encrypt(c, vblk, len);
ssh_cipher_free(c);
}
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