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Second attempt. Can successfully decrypt the _first block_ of a packet.

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[originally from svn r570]
This commit is contained in:
Simon Tatham
2000-09-05 16:23:36 +00:00
parent 35205e5cb7
commit 36a499a7f1
5 changed files with 169 additions and 37 deletions
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26
sshblowf.c
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@ -392,6 +392,30 @@ static void blowfish_setkey(BlowfishContext *ctx,
#define SSH_SESSION_KEY_LENGTH 32
static BlowfishContext ectx, dctx;
static void blowfish_cskey(unsigned char *key)
{
blowfish_setkey(&ectx, key, 16);
logevent("Initialised Blowfish client->server encryption");
}
static void blowfish_sckey(unsigned char *key)
{
blowfish_setkey(&dctx, key, 16);
logevent("Initialised Blowfish server->client encryption");
}
static void blowfish_csiv(unsigned char *key)
{
ectx.iv0 = GET_32BIT_LSB_FIRST(key);
ectx.iv1 = GET_32BIT_LSB_FIRST(key+4);
}
static void blowfish_sciv(unsigned char *key)
{
dctx.iv0 = GET_32BIT_LSB_FIRST(key);
dctx.iv1 = GET_32BIT_LSB_FIRST(key+4);
}
static void blowfish_sesskey(unsigned char *key)
{
blowfish_setkey(&ectx, key, SSH_SESSION_KEY_LENGTH);
@ -413,6 +437,8 @@ static void blowfish_decrypt_blk(unsigned char *blk, int len)
struct ssh_cipher ssh_blowfish = {
blowfish_sesskey,
blowfish_csiv, blowfish_cskey,
blowfish_sciv, blowfish_sckey,
blowfish_encrypt_blk,
blowfish_decrypt_blk,
"blowfish-cbc",