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/*
20140204
20241210 - reformated using clang-format
Jan Mojzis
Public domain.
*/
#include "crypto.h"
#include "packetparser.h"
#include "stringparser.h"
#include "str.h"
#include "byte.h"
#include "e.h"
#include "log.h"
#include "bug.h"
#include "purge.h"
#include "sshcrypto.h"
struct sshcrypto_key sshcrypto_keys[] = {
{
"ssh-ed25519",
crypto_sign_ed25519,
crypto_sign_ed25519_open,
crypto_sign_ed25519_keypair,
{0},
crypto_sign_ed25519_PUBLICKEYBYTES,
crypto_sign_ed25519_SECRETKEYBYTES,
crypto_sign_ed25519_BYTES,
"ed25519.pk",
".ed25519.sk",
sshcrypto_TYPENEWCRYPTO,
0,
0,
ed25519_putsignature,
ed25519_putsignpk,
ed25519_putsignpkbase64,
ed25519_parsesignature,
ed25519_parsesignpk,
},
#if 0
{ "pqkeyTODO",
crypto_sign_ed25519,
crypto_sign_ed25519_open,
crypto_sign_ed25519_keypair,
{0},
crypto_sign_ed25519_PUBLICKEYBYTES,
crypto_sign_ed25519_SECRETKEYBYTES,
crypto_sign_ed25519_BYTES,
"pqkeyTODO.pk",
".pqkeyTODO.sk",
sshcrypto_TYPEPQCRYPTO,
0,
0,
ed25519_putsignature,
ed25519_putsignpk,
ed25519_putsignpkbase64,
ed25519_parsesignature,
ed25519_parsesignpk,
},
#endif
{
0,
0,
0,
0,
{0},
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
},
};
const char *sshcrypto_key_name = 0;
int (*sshcrypto_sign)(unsigned char *, unsigned long long *,
const unsigned char *, unsigned long long,
const unsigned char *) = 0;
unsigned char *sshcrypto_sign_publickey = 0;
long long sshcrypto_sign_publickeybytes = 0;
long long sshcrypto_sign_secretkeybytes = 0;
long long sshcrypto_sign_bytes = 0;
const char *sshcrypto_sign_secretkeyfilename = 0;
void (*sshcrypto_buf_putsignature)(struct buf *, const unsigned char *) = 0;
void (*sshcrypto_buf_putsignpk)(struct buf *, const unsigned char *) = 0;
int sshcrypto_key_select(const unsigned char *buf, long long len) {
long long i, pos = 0;
const unsigned char *x;
long long xlen;
if (sshcrypto_key_name) return 1;
if (buf[len] != 0) bug_proto();
log_d2("kex: client: key algorithms: ", (const char *) buf);
for (;;) {
pos = stringparser(buf, len, pos, &x, &xlen);
if (!pos) break;
for (i = 0; sshcrypto_keys[i].name; ++i) {
if (!sshcrypto_keys[i].sign_flagserver) continue;
if (str_equaln((const char *) x, xlen, sshcrypto_keys[i].name)) {
sshcrypto_key_name = sshcrypto_keys[i].name;
sshcrypto_sign = sshcrypto_keys[i].sign;
sshcrypto_sign_publickey = sshcrypto_keys[i].sign_publickey;
sshcrypto_sign_publickeybytes =
sshcrypto_keys[i].sign_publickeybytes;
sshcrypto_sign_secretkeybytes =
sshcrypto_keys[i].sign_secretkeybytes;
sshcrypto_sign_bytes = sshcrypto_keys[i].sign_bytes;
sshcrypto_sign_secretkeyfilename =
sshcrypto_keys[i].sign_secretkeyfilename;
sshcrypto_buf_putsignature = sshcrypto_keys[i].buf_putsignature;
sshcrypto_buf_putsignpk = sshcrypto_keys[i].buf_putsignpk;
log_d2("kex: key selected: ", sshcrypto_keys[i].name);
return 1;
}
}
}
log_d2("kex: key not available ", (const char *) buf);
errno = EPROTO;
return 0;
}
void sshcrypto_key_put(struct buf *b) {
crypto_uint32 len = 0;
long long i, j, start;
j = 0;
for (i = 0; sshcrypto_keys[i].name; ++i) {
if (!sshcrypto_keys[i].sign_flagserver) continue;
if (j++) ++len;
len += str_len(sshcrypto_keys[i].name);
}
buf_putnum32(b, len);
start = b->len;
j = 0;
for (i = 0; sshcrypto_keys[i].name; ++i) {
if (!sshcrypto_keys[i].sign_flagserver) continue;
if (j++) buf_puts(b, ",");
buf_puts(b, sshcrypto_keys[i].name);
}
b->buf[b->len] = 0;
log_d2("kex: server: key algorithms: ", (char *) b->buf + start);
}
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