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[pki] Added ssh_pki_publickey_from_privatekey() function

Этот коммит содержится в:
milo 2011-03-09 13:44:51 +01:00
родитель 69d2457762
Коммит 2694853979
2 изменённых файлов: 191 добавлений и 0 удалений

Просмотреть файл

@ -47,4 +47,7 @@ enum ssh_keytypes_e ssh_key_type(ssh_key key);
int ssh_key_import_private(ssh_key key, ssh_session session,
const char *filename, const char *passphrase);
ssh_key ssh_pki_publickey_from_privatekey(ssh_key privkey);
#endif /* PKI_H_ */

188
src/pki.c
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@ -139,6 +139,194 @@ int ssh_pki_import_privkey_base64(ssh_key key, ssh_session session,
return SSH_OK;
}
ssh_key ssh_pki_publickey_from_privatekey(ssh_key privkey) {
ssh_key pubkey = NULL;
#ifdef HAVE_LIBGCRYPT
gcry_sexp_t sexp;
const char *tmp = NULL;
size_t size;
ssh_string p = NULL;
ssh_string q = NULL;
ssh_string g = NULL;
ssh_string y = NULL;
ssh_string e = NULL;
ssh_string n = NULL;
#endif /* HAVE_LIBGCRYPT */
if(privkey == NULL || !ssh_key_is_private(privkey)) {
return NULL;
}
pubkey = malloc(sizeof(struct ssh_public_key_struct));
if (pubkey == NULL) {
return NULL;
}
ZERO_STRUCTP(pubkey);
pubkey->type = privkey->type;
switch(pubkey->type) {
case SSH_KEYTYPE_DSS:
#ifdef HAVE_LIBGCRYPT
sexp = gcry_sexp_find_token(privkey->dsa, "p", 0);
if (sexp == NULL) {
goto error;
}
tmp = gcry_sexp_nth_data(sexp, 1, &size);
p = ssh_string_new(size);
if (p == NULL) {
goto error;
}
ssh_string_fill(p,(char *) tmp, size);
gcry_sexp_release(sexp);
sexp = gcry_sexp_find_token(privkey->dsa,"q",0);
if (sexp == NULL) {
goto error;
}
tmp = gcry_sexp_nth_data(sexp,1,&size);
q = ssh_string_new(size);
if (q == NULL) {
goto error;
}
ssh_string_fill(q,(char *) tmp,size);
gcry_sexp_release(sexp);
sexp = gcry_sexp_find_token(privkey->dsa, "g", 0);
if (sexp == NULL) {
goto error;
}
tmp = gcry_sexp_nth_data(sexp,1,&size);
g = ssh_string_new(size);
if (g == NULL) {
goto error;
}
ssh_string_fill(g,(char *) tmp,size);
gcry_sexp_release(sexp);
sexp = gcry_sexp_find_token(privkey->dsa,"y",0);
if (sexp == NULL) {
goto error;
}
tmp = gcry_sexp_nth_data(sexp,1,&size);
y = ssh_string_new(size);
if (y == NULL) {
goto error;
}
ssh_string_fill(y,(char *) tmp,size);
gcry_sexp_release(sexp);
gcry_sexp_build(&pubkey->dsa, NULL,
"(public-key(dsa(p %b)(q %b)(g %b)(y %b)))",
ssh_string_len(p), ssh_string_data(p),
ssh_string_len(q), ssh_string_data(q),
ssh_string_len(g), ssh_string_data(g),
ssh_string_len(y), ssh_string_data(y));
ssh_string_burn(p);
ssh_string_free(p);
ssh_string_burn(q);
ssh_string_free(q);
ssh_string_burn(g);
ssh_string_free(g);
ssh_string_burn(y);
ssh_string_free(y);
#elif defined HAVE_LIBCRYPTO
pubkey->dsa = DSA_new();
if (pubkey->dsa == NULL) {
goto error;
}
pubkey->dsa->p = BN_dup(privkey->dsa->p);
pubkey->dsa->q = BN_dup(privkey->dsa->q);
pubkey->dsa->g = BN_dup(privkey->dsa->g);
pubkey->dsa->pub_key = BN_dup(privkey->dsa->pub_key);
if (pubkey->dsa->p == NULL ||
pubkey->dsa->q == NULL ||
pubkey->dsa->g == NULL ||
pubkey->dsa->pub_key == NULL) {
goto error;
}
#endif /* HAVE_LIBCRYPTO */
break;
case SSH_KEYTYPE_RSA:
case SSH_KEYTYPE_RSA1:
#ifdef HAVE_LIBGCRYPT
sexp = gcry_sexp_find_token(privkey->rsa, "n", 0);
if (sexp == NULL) {
goto error;
}
tmp = gcry_sexp_nth_data(sexp, 1, &size);
n = ssh_string_new(size);
if (n == NULL) {
goto error;
}
ssh_string_fill(n, (char *) tmp, size);
gcry_sexp_release(sexp);
sexp = gcry_sexp_find_token(privkey->rsa, "e", 0);
if (sexp == NULL) {
goto error;
}
tmp = gcry_sexp_nth_data(sexp, 1, &size);
e = ssh_string_new(size);
if (e == NULL) {
goto error;
}
ssh_string_fill(e, (char *) tmp, size);
gcry_sexp_release(sexp);
gcry_sexp_build(&pubkey->rsa, NULL,
"(public-key(rsa(n %b)(e %b)))",
ssh_string_len(n), ssh_string_data(n),
ssh_string_len(e), ssh_string_data(e));
if (pubkey->rsa == NULL) {
goto error;
}
ssh_string_burn(e);
ssh_string_free(e);
ssh_string_burn(n);
ssh_string_free(n);
#elif defined HAVE_LIBCRYPTO
pubkey->rsa = RSA_new();
if (pubkey->rsa == NULL) {
goto error;
}
pubkey->rsa->e = BN_dup(privkey->rsa->e);
pubkey->rsa->n = BN_dup(privkey->rsa->n);
if (pubkey->rsa->e == NULL ||
pubkey->rsa->n == NULL) {
goto error;
}
#endif
break;
default:
ssh_key_free(pubkey);
return NULL;
}
pubkey->type_c = ssh_type_to_char(privkey->type);
return pubkey;
error:
#ifdef HAVE_LIBGCRYPT
gcry_sexp_release(sexp);
ssh_string_burn(p);
ssh_string_free(p);
ssh_string_burn(q);
ssh_string_free(q);
ssh_string_burn(g);
ssh_string_free(g);
ssh_string_burn(y);
ssh_string_free(y);
ssh_string_burn(e);
ssh_string_free(e);
ssh_string_burn(n);
ssh_string_free(n);
#endif
ssh_key_free(pubkey);
return NULL;
}
/**
* @}
*/