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GNUTLS: Improve rb_ssl_get_cipher()

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* Add debugging assertions.

* Reduce the buffer size in line with the other backends.

* Ask for the cipher name directly instead of constructing it ourselves
  from the key exchange / authentication algorithm, symmetric encryption
  algorithm, and message authentication code algorithm.
This commit is contained in:
Aaron Jones 2016-09-16 22:09:49 +00:00
parent dd59642de1
commit 9c7dda22e8
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GPG key ID: EC6F86EE9CD840B5
1 changed files with 9 additions and 19 deletions
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28
libratbox/src/gnutls.c
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@ -799,30 +799,20 @@ rb_get_ssl_info(char *buf, size_t len)
}
const char *
rb_ssl_get_cipher(rb_fde_t *F)
rb_ssl_get_cipher(rb_fde_t *const F)
{
static char buf[1024];
if(F == NULL || F->ssl == NULL)
return NULL;
const char* proto_name =
gnutls_protocol_get_name(gnutls_protocol_get_version(SSL_P(F)));
static char buf[512];
const char* kex_alg_name =
gnutls_kx_get_name(gnutls_kx_get(SSL_P(F)));
gnutls_protocol_t version_ptr = gnutls_protocol_get_version(SSL_P(F));
gnutls_cipher_algorithm_t cipher_ptr = gnutls_cipher_get(SSL_P(F));
const char* cipher_alg_name =
gnutls_cipher_get_name(gnutls_cipher_get(SSL_P(F)));
const char *const version = gnutls_protocol_get_name(version_ptr);
const char *const cipher = gnutls_cipher_get_name(cipher_ptr);
const char* mac_alg_name =
gnutls_mac_get_name(gnutls_mac_get(SSL_P(F)));
(void) rb_snprintf(buf, sizeof buf, "%s%s%s%s%s%s%s",
proto_name ? proto_name : "",
proto_name ? ", " : "",
kex_alg_name ? kex_alg_name : "",
kex_alg_name ? "-" : "",
cipher_alg_name ? cipher_alg_name : "",
cipher_alg_name ? "-" : "",
mac_alg_name ? mac_alg_name : "");
(void) rb_snprintf(buf, sizeof buf, "%s, %s", version, cipher);
return buf;
}