*/
#include "includes.h"
-RCSID("$OpenBSD: kex.c,v 1.24 2001/03/28 21:59:40 provos Exp $");
+RCSID("$OpenBSD: kex.c,v 1.34 2001/04/30 15:50:46 markus Exp $");
#include <openssl/crypto.h>
-#include <openssl/bio.h>
-#include <openssl/bn.h>
-#include <openssl/dh.h>
-#include <openssl/pem.h>
#include "ssh2.h"
#include "xmalloc.h"
#include "log.h"
#include "mac.h"
#include "match.h"
+#include "dispatch.h"
#define KEX_COOKIE_LEN 16
-Buffer *
-kex_init(char *myproposal[PROPOSAL_MAX])
+void kex_kexinit_finish(Kex *kex);
+void kex_choose_conf(Kex *k);
+
+/* put algorithm proposal into buffer */
+void
+kex_prop2buf(Buffer *b, char *proposal[PROPOSAL_MAX])
{
- int first_kex_packet_follows = 0;
- u_char cookie[KEX_COOKIE_LEN];
u_int32_t rand = 0;
int i;
- Buffer *ki = xmalloc(sizeof(*ki));
+
+ buffer_clear(b);
for (i = 0; i < KEX_COOKIE_LEN; i++) {
if (i % 4 == 0)
rand = arc4random();
- cookie[i] = rand & 0xff;
+ buffer_put_char(b, rand & 0xff);
rand >>= 8;
}
- buffer_init(ki);
- buffer_append(ki, (char *)cookie, sizeof cookie);
for (i = 0; i < PROPOSAL_MAX; i++)
- buffer_put_cstring(ki, myproposal[i]);
- buffer_put_char(ki, first_kex_packet_follows);
- buffer_put_int(ki, 0); /* uint32 reserved */
- return ki;
+ buffer_put_cstring(b, proposal[i]);
+ buffer_put_char(b, 0); /* first_kex_packet_follows */
+ buffer_put_int(b, 0); /* uint32 reserved */
}
-/* send kexinit, parse and save reply */
-void
-kex_exchange_kexinit(
- Buffer *my_kexinit, Buffer *peer_kexint,
- char *peer_proposal[PROPOSAL_MAX])
+/* parse buffer and return algorithm proposal */
+char **
+kex_buf2prop(Buffer *raw)
{
+ Buffer b;
int i;
- char *ptr;
- int plen;
+ char **proposal;
- debug("send KEXINIT");
- packet_start(SSH2_MSG_KEXINIT);
- packet_put_raw(buffer_ptr(my_kexinit), buffer_len(my_kexinit));
- packet_send();
- packet_write_wait();
- debug("done");
+ proposal = xmalloc(PROPOSAL_MAX * sizeof(char *));
- /*
- * read and save raw KEXINIT payload in buffer. this is used during
- * computation of the session_id and the session keys.
- */
- debug("wait KEXINIT");
- packet_read_expect(&plen, SSH2_MSG_KEXINIT);
- ptr = packet_get_raw(&plen);
- buffer_append(peer_kexint, ptr, plen);
-
- /* parse packet and save algorithm proposal */
+ buffer_init(&b);
+ buffer_append(&b, buffer_ptr(raw), buffer_len(raw));
/* skip cookie */
for (i = 0; i < KEX_COOKIE_LEN; i++)
- packet_get_char();
+ buffer_get_char(&b);
/* extract kex init proposal strings */
for (i = 0; i < PROPOSAL_MAX; i++) {
- peer_proposal[i] = packet_get_string(NULL);
- debug("got kexinit: %s", peer_proposal[i]);
+ proposal[i] = buffer_get_string(&b,NULL);
+ debug2("kex_parse_kexinit: %s", proposal[i]);
}
- /* first kex follow / reserved */
- i = packet_get_char();
- debug("first kex follow: %d ", i);
- i = packet_get_int();
- debug("reserved: %d ", i);
- packet_done();
- debug("done");
+ /* first kex follows / reserved */
+ i = buffer_get_char(&b);
+ debug2("kex_parse_kexinit: first_kex_follows %d ", i);
+ i = buffer_get_int(&b);
+ debug2("kex_parse_kexinit: reserved %d ", i);
+ buffer_free(&b);
+ return proposal;
}
-/* diffie-hellman-group1-sha1 */
-
-int
-dh_pub_is_valid(DH *dh, BIGNUM *dh_pub)
+void
+kex_prop_free(char **proposal)
{
int i;
- int n = BN_num_bits(dh_pub);
- int bits_set = 0;
- if (dh_pub->neg) {
- log("invalid public DH value: negativ");
- return 0;
- }
- for (i = 0; i <= n; i++)
- if (BN_is_bit_set(dh_pub, i))
- bits_set++;
- debug("bits set: %d/%d", bits_set, BN_num_bits(dh->p));
-
- /* if g==2 and bits_set==1 then computing log_g(dh_pub) is trivial */
- if (bits_set > 1 && (BN_cmp(dh_pub, dh->p) == -1))
- return 1;
- log("invalid public DH value (%d/%d)", bits_set, BN_num_bits(dh->p));
- return 0;
+ for (i = 0; i < PROPOSAL_MAX; i++)
+ xfree(proposal[i]);
+ xfree(proposal);
}
void
-dh_gen_key(DH *dh, int need)
+kex_protocol_error(int type, int plen, void *ctxt)
{
- int i, bits_set = 0, tries = 0;
-
- if (dh->p == NULL)
- fatal("dh_gen_key: dh->p == NULL");
- if (2*need >= BN_num_bits(dh->p))
- fatal("dh_gen_key: group too small: %d (2*need %d)",
- BN_num_bits(dh->p), 2*need);
- do {
- if (dh->priv_key != NULL)
- BN_free(dh->priv_key);
- dh->priv_key = BN_new();
- if (dh->priv_key == NULL)
- fatal("dh_gen_key: BN_new failed");
- /* generate a 2*need bits random private exponent */
- if (!BN_rand(dh->priv_key, 2*need, 0, 0))
- fatal("dh_gen_key: BN_rand failed");
- if (DH_generate_key(dh) == 0)
- fatal("DH_generate_key");
- for (i = 0; i <= BN_num_bits(dh->priv_key); i++)
- if (BN_is_bit_set(dh->priv_key, i))
- bits_set++;
- debug("dh_gen_key: priv key bits set: %d/%d",
- bits_set, BN_num_bits(dh->priv_key));
- if (tries++ > 10)
- fatal("dh_gen_key: too many bad keys: giving up");
- } while (!dh_pub_is_valid(dh, dh->pub_key));
+ error("Hm, kex protocol error: type %d plen %d", type, plen);
}
-DH *
-dh_new_group_asc(const char *gen, const char *modulus)
+void
+kex_clear_dispatch(void)
{
- DH *dh;
- int ret;
-
- dh = DH_new();
- if (dh == NULL)
- fatal("DH_new");
-
- if ((ret = BN_hex2bn(&dh->p, modulus)) < 0)
- fatal("BN_hex2bn p");
- if ((ret = BN_hex2bn(&dh->g, gen)) < 0)
- fatal("BN_hex2bn g");
+ int i;
- return (dh);
+ /* Numbers 30-49 are used for kex packets */
+ for (i = 30; i <= 49; i++)
+ dispatch_set(i, &kex_protocol_error);
}
-/*
- * This just returns the group, we still need to generate the exchange
- * value.
- */
-
-DH *
-dh_new_group(BIGNUM *gen, BIGNUM *modulus)
+void
+kex_finish(Kex *kex)
{
- DH *dh;
-
- dh = DH_new();
- if (dh == NULL)
- fatal("DH_new");
- dh->p = modulus;
- dh->g = gen;
+ int plen;
- return (dh);
-}
+ kex_clear_dispatch();
-DH *
-dh_new_group1(void)
-{
- static char *gen = "2", *group1 =
- "FFFFFFFF" "FFFFFFFF" "C90FDAA2" "2168C234" "C4C6628B" "80DC1CD1"
- "29024E08" "8A67CC74" "020BBEA6" "3B139B22" "514A0879" "8E3404DD"
- "EF9519B3" "CD3A431B" "302B0A6D" "F25F1437" "4FE1356D" "6D51C245"
- "E485B576" "625E7EC6" "F44C42E9" "A637ED6B" "0BFF5CB6" "F406B7ED"
- "EE386BFB" "5A899FA5" "AE9F2411" "7C4B1FE6" "49286651" "ECE65381"
- "FFFFFFFF" "FFFFFFFF";
-
- return (dh_new_group_asc(gen, group1));
+ packet_start(SSH2_MSG_NEWKEYS);
+ packet_send();
+ /* packet_write_wait(); */
+ debug("SSH2_MSG_NEWKEYS sent");
+
+ debug("waiting for SSH2_MSG_NEWKEYS");
+ packet_read_expect(&plen, SSH2_MSG_NEWKEYS);
+ debug("SSH2_MSG_NEWKEYS received");
+
+ kex->done = 1;
+ buffer_clear(&kex->peer);
+ /* buffer_clear(&kex->my); */
+ kex->flags &= ~KEX_INIT_SENT;
+ xfree(kex->name);
+ kex->name = NULL;
}
-#ifdef DEBUG_KEX
void
-dump_digest(u_char *digest, int len)
+kex_send_kexinit(Kex *kex)
{
- int i;
- for (i = 0; i< len; i++){
- fprintf(stderr, "%02x", digest[i]);
- if(i%2!=0)
- fprintf(stderr, " ");
+ if (kex == NULL) {
+ error("kex_send_kexinit: no kex, cannot rekey");
+ return;
}
- fprintf(stderr, "\n");
+ if (kex->flags & KEX_INIT_SENT) {
+ debug("KEX_INIT_SENT");
+ return;
+ }
+ kex->done = 0;
+ packet_start(SSH2_MSG_KEXINIT);
+ packet_put_raw(buffer_ptr(&kex->my), buffer_len(&kex->my));
+ packet_send();
+ debug("SSH2_MSG_KEXINIT sent");
+ kex->flags |= KEX_INIT_SENT;
}
-#endif
-u_char *
-kex_hash(
- char *client_version_string,
- char *server_version_string,
- char *ckexinit, int ckexinitlen,
- char *skexinit, int skexinitlen,
- char *serverhostkeyblob, int sbloblen,
- BIGNUM *client_dh_pub,
- BIGNUM *server_dh_pub,
- BIGNUM *shared_secret)
+void
+kex_input_kexinit(int type, int plen, void *ctxt)
{
- Buffer b;
- static u_char digest[EVP_MAX_MD_SIZE];
- EVP_MD *evp_md = EVP_sha1();
- EVP_MD_CTX md;
-
- buffer_init(&b);
- buffer_put_string(&b, client_version_string, strlen(client_version_string));
- buffer_put_string(&b, server_version_string, strlen(server_version_string));
-
- /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */
- buffer_put_int(&b, ckexinitlen+1);
- buffer_put_char(&b, SSH2_MSG_KEXINIT);
- buffer_append(&b, ckexinit, ckexinitlen);
- buffer_put_int(&b, skexinitlen+1);
- buffer_put_char(&b, SSH2_MSG_KEXINIT);
- buffer_append(&b, skexinit, skexinitlen);
-
- buffer_put_string(&b, serverhostkeyblob, sbloblen);
- buffer_put_bignum2(&b, client_dh_pub);
- buffer_put_bignum2(&b, server_dh_pub);
- buffer_put_bignum2(&b, shared_secret);
+ char *ptr;
+ int dlen;
+ int i;
+ Kex *kex = (Kex *)ctxt;
-#ifdef DEBUG_KEX
- buffer_dump(&b);
-#endif
+ debug("SSH2_MSG_KEXINIT received");
+ if (kex == NULL)
+ fatal("kex_input_kexinit: no kex, cannot rekey");
- EVP_DigestInit(&md, evp_md);
- EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b));
- EVP_DigestFinal(&md, digest, NULL);
+ ptr = packet_get_raw(&dlen);
+ buffer_append(&kex->peer, ptr, dlen);
- buffer_free(&b);
+ /* discard packet */
+ for (i = 0; i < KEX_COOKIE_LEN; i++)
+ packet_get_char();
+ for (i = 0; i < PROPOSAL_MAX; i++)
+ xfree(packet_get_string(NULL));
+ packet_get_char();
+ packet_get_int();
+ packet_done();
-#ifdef DEBUG_KEX
- dump_digest(digest, evp_md->md_size);
-#endif
- return digest;
+ kex_kexinit_finish(kex);
}
-u_char *
-kex_hash_gex(
- char *client_version_string,
- char *server_version_string,
- char *ckexinit, int ckexinitlen,
- char *skexinit, int skexinitlen,
- char *serverhostkeyblob, int sbloblen,
- int min, int wantbits, int max, BIGNUM *prime, BIGNUM *gen,
- BIGNUM *client_dh_pub,
- BIGNUM *server_dh_pub,
- BIGNUM *shared_secret)
+Kex *
+kex_setup(char *proposal[PROPOSAL_MAX])
{
- Buffer b;
- static u_char digest[EVP_MAX_MD_SIZE];
- EVP_MD *evp_md = EVP_sha1();
- EVP_MD_CTX md;
-
- buffer_init(&b);
- buffer_put_string(&b, client_version_string, strlen(client_version_string));
- buffer_put_string(&b, server_version_string, strlen(server_version_string));
-
- /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */
- buffer_put_int(&b, ckexinitlen+1);
- buffer_put_char(&b, SSH2_MSG_KEXINIT);
- buffer_append(&b, ckexinit, ckexinitlen);
- buffer_put_int(&b, skexinitlen+1);
- buffer_put_char(&b, SSH2_MSG_KEXINIT);
- buffer_append(&b, skexinit, skexinitlen);
-
- buffer_put_string(&b, serverhostkeyblob, sbloblen);
- if (min == -1 || max == -1)
- buffer_put_int(&b, wantbits);
- else {
- buffer_put_int(&b, min);
- buffer_put_int(&b, wantbits);
- buffer_put_int(&b, max);
- }
- buffer_put_bignum2(&b, prime);
- buffer_put_bignum2(&b, gen);
- buffer_put_bignum2(&b, client_dh_pub);
- buffer_put_bignum2(&b, server_dh_pub);
- buffer_put_bignum2(&b, shared_secret);
-
-#ifdef DEBUG_KEX
- buffer_dump(&b);
-#endif
+ Kex *kex;
- EVP_DigestInit(&md, evp_md);
- EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b));
- EVP_DigestFinal(&md, digest, NULL);
+ kex = xmalloc(sizeof(*kex));
+ memset(kex, 0, sizeof(*kex));
+ buffer_init(&kex->peer);
+ buffer_init(&kex->my);
+ kex_prop2buf(&kex->my, proposal);
+ kex->done = 0;
- buffer_free(&b);
+ kex_send_kexinit(kex); /* we start */
+ kex_clear_dispatch();
+ dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
-#ifdef DEBUG_KEX
- dump_digest(digest, evp_md->md_size);
-#endif
- return digest;
+ return kex;
}
-u_char *
-derive_key(int id, int need, u_char *hash, BIGNUM *shared_secret)
+void
+kex_kexinit_finish(Kex *kex)
{
- Buffer b;
- EVP_MD *evp_md = EVP_sha1();
- EVP_MD_CTX md;
- char c = id;
- int have;
- int mdsz = evp_md->md_size;
- u_char *digest = xmalloc(((need+mdsz-1)/mdsz)*mdsz);
-
- buffer_init(&b);
- buffer_put_bignum2(&b, shared_secret);
-
- EVP_DigestInit(&md, evp_md);
- EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b)); /* shared_secret K */
- EVP_DigestUpdate(&md, hash, mdsz); /* transport-06 */
- EVP_DigestUpdate(&md, &c, 1); /* key id */
- EVP_DigestUpdate(&md, hash, mdsz); /* session id */
- EVP_DigestFinal(&md, digest, NULL);
-
- /* expand */
- for (have = mdsz; need > have; have += mdsz) {
- EVP_DigestInit(&md, evp_md);
- EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b));
- EVP_DigestUpdate(&md, hash, mdsz);
- EVP_DigestUpdate(&md, digest, have);
- EVP_DigestFinal(&md, digest + have, NULL);
+ if (!(kex->flags & KEX_INIT_SENT))
+ kex_send_kexinit(kex);
+
+ kex_choose_conf(kex);
+
+ switch(kex->kex_type) {
+ case DH_GRP1_SHA1:
+ kexdh(kex);
+ break;
+ case DH_GEX_SHA1:
+ kexgex(kex);
+ break;
+ default:
+ fatal("Unsupported key exchange %d", kex->kex_type);
}
- buffer_free(&b);
-#ifdef DEBUG_KEX
- fprintf(stderr, "Digest '%c'== ", c);
- dump_digest(digest, need);
-#endif
- return digest;
}
void
xfree(hostkeyalg);
}
-Kex *
-kex_choose_conf(char *cprop[PROPOSAL_MAX], char *sprop[PROPOSAL_MAX], int server)
+void
+kex_choose_conf(Kex *kex)
{
+ Newkeys *newkeys;
+ char **my, **peer;
+ char **cprop, **sprop;
+ int nenc, nmac, ncomp;
int mode;
int ctos; /* direction: if true client-to-server */
int need;
- Kex *k;
- k = xmalloc(sizeof(*k));
- memset(k, 0, sizeof(*k));
- k->server = server;
+ my = kex_buf2prop(&kex->my);
+ peer = kex_buf2prop(&kex->peer);
+
+ if (kex->server) {
+ cprop=peer;
+ sprop=my;
+ } else {
+ cprop=my;
+ sprop=peer;
+ }
+ /* Algorithm Negotiation */
for (mode = 0; mode < MODE_MAX; mode++) {
- int nenc, nmac, ncomp;
- ctos = (!k->server && mode == MODE_OUT) || (k->server && mode == MODE_IN);
+ newkeys = xmalloc(sizeof(*newkeys));
+ memset(newkeys, 0, sizeof(*newkeys));
+ kex->newkeys[mode] = newkeys;
+ ctos = (!kex->server && mode == MODE_OUT) || (kex->server && mode == MODE_IN);
nenc = ctos ? PROPOSAL_ENC_ALGS_CTOS : PROPOSAL_ENC_ALGS_STOC;
nmac = ctos ? PROPOSAL_MAC_ALGS_CTOS : PROPOSAL_MAC_ALGS_STOC;
ncomp = ctos ? PROPOSAL_COMP_ALGS_CTOS : PROPOSAL_COMP_ALGS_STOC;
- choose_enc (&k->enc [mode], cprop[nenc], sprop[nenc]);
- choose_mac (&k->mac [mode], cprop[nmac], sprop[nmac]);
- choose_comp(&k->comp[mode], cprop[ncomp], sprop[ncomp]);
+ choose_enc (&newkeys->enc, cprop[nenc], sprop[nenc]);
+ choose_mac (&newkeys->mac, cprop[nmac], sprop[nmac]);
+ choose_comp(&newkeys->comp, cprop[ncomp], sprop[ncomp]);
debug("kex: %s %s %s %s",
ctos ? "client->server" : "server->client",
- k->enc[mode].name,
- k->mac[mode].name,
- k->comp[mode].name);
+ newkeys->enc.name,
+ newkeys->mac.name,
+ newkeys->comp.name);
}
- choose_kex(k, cprop[PROPOSAL_KEX_ALGS], sprop[PROPOSAL_KEX_ALGS]);
- choose_hostkeyalg(k, cprop[PROPOSAL_SERVER_HOST_KEY_ALGS],
+ choose_kex(kex, cprop[PROPOSAL_KEX_ALGS], sprop[PROPOSAL_KEX_ALGS]);
+ choose_hostkeyalg(kex, cprop[PROPOSAL_SERVER_HOST_KEY_ALGS],
sprop[PROPOSAL_SERVER_HOST_KEY_ALGS]);
need = 0;
for (mode = 0; mode < MODE_MAX; mode++) {
- if (need < k->enc[mode].cipher->key_len)
- need = k->enc[mode].cipher->key_len;
- if (need < k->enc[mode].cipher->block_size)
- need = k->enc[mode].cipher->block_size;
- if (need < k->mac[mode].key_len)
- need = k->mac[mode].key_len;
+ newkeys = kex->newkeys[mode];
+ if (need < newkeys->enc.cipher->key_len)
+ need = newkeys->enc.cipher->key_len;
+ if (need < newkeys->enc.cipher->block_size)
+ need = newkeys->enc.cipher->block_size;
+ if (need < newkeys->mac.key_len)
+ need = newkeys->mac.key_len;
}
/* XXX need runden? */
- k->we_need = need;
- return k;
+ kex->we_need = need;
+
+ kex_prop_free(my);
+ kex_prop_free(peer);
+}
+
+u_char *
+derive_key(Kex *kex, int id, int need, u_char *hash, BIGNUM *shared_secret)
+{
+ Buffer b;
+ EVP_MD *evp_md = EVP_sha1();
+ EVP_MD_CTX md;
+ char c = id;
+ int have;
+ int mdsz = evp_md->md_size;
+ u_char *digest = xmalloc(roundup(need, mdsz));
+
+ buffer_init(&b);
+ buffer_put_bignum2(&b, shared_secret);
+
+ /* K1 = HASH(K || H || "A" || session_id) */
+ EVP_DigestInit(&md, evp_md);
+ if (!(datafellows & SSH_BUG_DERIVEKEY))
+ EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b));
+ EVP_DigestUpdate(&md, hash, mdsz);
+ EVP_DigestUpdate(&md, &c, 1);
+ EVP_DigestUpdate(&md, kex->session_id, kex->session_id_len);
+ EVP_DigestFinal(&md, digest, NULL);
+
+ /*
+ * expand key:
+ * Kn = HASH(K || H || K1 || K2 || ... || Kn-1)
+ * Key = K1 || K2 || ... || Kn
+ */
+ for (have = mdsz; need > have; have += mdsz) {
+ EVP_DigestInit(&md, evp_md);
+ if (!(datafellows & SSH_BUG_DERIVEKEY))
+ EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b));
+ EVP_DigestUpdate(&md, hash, mdsz);
+ EVP_DigestUpdate(&md, digest, have);
+ EVP_DigestFinal(&md, digest + have, NULL);
+ }
+ buffer_free(&b);
+#ifdef DEBUG_KEX
+ fprintf(stderr, "key '%c'== ", c);
+ dump_digest("key", digest, need);
+#endif
+ return digest;
}
+Newkeys *current_keys[MODE_MAX];
+
#define NKEYS 6
-int
-kex_derive_keys(Kex *k, u_char *hash, BIGNUM *shared_secret)
+void
+kex_derive_keys(Kex *kex, u_char *hash, BIGNUM *shared_secret)
{
- int i;
- int mode;
- int ctos;
u_char *keys[NKEYS];
+ int i, mode, ctos;
for (i = 0; i < NKEYS; i++)
- keys[i] = derive_key('A'+i, k->we_need, hash, shared_secret);
+ keys[i] = derive_key(kex, 'A'+i, kex->we_need, hash, shared_secret);
+ debug("kex_derive_keys");
for (mode = 0; mode < MODE_MAX; mode++) {
- ctos = (!k->server && mode == MODE_OUT) || (k->server && mode == MODE_IN);
- k->enc[mode].iv = keys[ctos ? 0 : 1];
- k->enc[mode].key = keys[ctos ? 2 : 3];
- k->mac[mode].key = keys[ctos ? 4 : 5];
+ current_keys[mode] = kex->newkeys[mode];
+ kex->newkeys[mode] = NULL;
+ ctos = (!kex->server && mode == MODE_OUT) || (kex->server && mode == MODE_IN);
+ current_keys[mode]->enc.iv = keys[ctos ? 0 : 1];
+ current_keys[mode]->enc.key = keys[ctos ? 2 : 3];
+ current_keys[mode]->mac.key = keys[ctos ? 4 : 5];
+ }
+}
+
+Newkeys *
+kex_get_newkeys(int mode)
+{
+ Newkeys *ret;
+
+ ret = current_keys[mode];
+ current_keys[mode] = NULL;
+ return ret;
+}
+
+#if defined(DEBUG_KEX) || defined(DEBUG_KEXDH)
+void
+dump_digest(char *msg, u_char *digest, int len)
+{
+ int i;
+
+ fprintf(stderr, "%s\n", msg);
+ for (i = 0; i< len; i++){
+ fprintf(stderr, "%02x", digest[i]);
+ if (i%32 == 31)
+ fprintf(stderr, "\n");
+ else if (i%8 == 7)
+ fprintf(stderr, " ");
}
- return 0;
+ fprintf(stderr, "\n");
}
+#endif
andersk / openssh.git / blobdiff