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kex: Move ssh_encrypt_rsa1 to SSHv1 kex code.

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This commit is contained in:
Andreas Schneider
2011-08-22 13:58:02 +02:00
parent 79ffd49940
commit d6829d073c
3 changed files with 66 additions and 65 deletions
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66
src/kex.c
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@@ -570,6 +570,72 @@ static int modulus_smaller(ssh_public_key k1, ssh_public_key k2){
}
static ssh_string ssh_encrypt_rsa1(ssh_session session,
ssh_string data,
ssh_public_key key) {
ssh_string str = NULL;
size_t len = ssh_string_len(data);
size_t size = 0;
#ifdef HAVE_LIBGCRYPT
const char *tmp = NULL;
gcry_sexp_t ret_sexp;
gcry_sexp_t data_sexp;
if (gcry_sexp_build(&data_sexp, NULL, "(data(flags pkcs1)(value %b))",
len, ssh_string_data(data))) {
ssh_set_error(session, SSH_FATAL, "RSA1 encrypt: libgcrypt error");
return NULL;
}
if (gcry_pk_encrypt(&ret_sexp, data_sexp, key->rsa_pub)) {
gcry_sexp_release(data_sexp);
ssh_set_error(session, SSH_FATAL, "RSA1 encrypt: libgcrypt error");
return NULL;
}
gcry_sexp_release(data_sexp);
data_sexp = gcry_sexp_find_token(ret_sexp, "a", 0);
if (data_sexp == NULL) {
ssh_set_error(session, SSH_FATAL, "RSA1 encrypt: libgcrypt error");
gcry_sexp_release(ret_sexp);
return NULL;
}
tmp = gcry_sexp_nth_data(data_sexp, 1, &size);
if (*tmp == 0) {
size--;
tmp++;
}
str = ssh_string_new(size);
if (str == NULL) {
ssh_set_error(session, SSH_FATAL, "Not enough space");
gcry_sexp_release(data_sexp);
gcry_sexp_release(ret_sexp);
return NULL;
}
ssh_string_fill(str, tmp, size);
gcry_sexp_release(data_sexp);
gcry_sexp_release(ret_sexp);
#elif defined HAVE_LIBCRYPTO
size = RSA_size(key->rsa_pub);
str = ssh_string_new(size);
if (str == NULL) {
ssh_set_error(session, SSH_FATAL, "Not enough space");
return NULL;
}
if (RSA_public_encrypt(len, ssh_string_data(data), ssh_string_data(str), key->rsa_pub,
RSA_PKCS1_PADDING) < 0) {
ssh_string_free(str);
return NULL;
}
#endif
return str;
}
#define ABS(A) ( (A)<0 ? -(A):(A) )
static ssh_string encrypt_session_key(ssh_session session, ssh_public_key srvkey,
ssh_public_key hostkey, int slen, int hlen) {