pineapple/externals/libressl/tls/tls_conninfo.c

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2022-04-24 22:29:35 +02:00
/* $OpenBSD: tls_conninfo.c,v 1.22 2021/01/05 15:57:38 tb Exp $ */
2020-12-28 16:15:37 +01:00
/*
* Copyright (c) 2015 Joel Sing <jsing@openbsd.org>
* Copyright (c) 2015 Bob Beck <beck@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <openssl/x509.h>
#include <tls.h>
#include "tls_internal.h"
int ASN1_time_tm_clamp_notafter(struct tm *tm);
int
tls_hex_string(const unsigned char *in, size_t inlen, char **out,
size_t *outlen)
{
static const char hex[] = "0123456789abcdef";
size_t i, len;
char *p;
if (outlen != NULL)
*outlen = 0;
if (inlen >= SIZE_MAX)
return (-1);
if ((*out = reallocarray(NULL, inlen + 1, 2)) == NULL)
return (-1);
p = *out;
len = 0;
for (i = 0; i < inlen; i++) {
p[len++] = hex[(in[i] >> 4) & 0x0f];
p[len++] = hex[in[i] & 0x0f];
}
p[len++] = 0;
if (outlen != NULL)
*outlen = len;
return (0);
}
static int
tls_get_peer_cert_hash(struct tls *ctx, char **hash)
{
*hash = NULL;
if (ctx->ssl_peer_cert == NULL)
return (0);
if (tls_cert_hash(ctx->ssl_peer_cert, hash) == -1) {
tls_set_errorx(ctx, "unable to compute peer certificate hash - out of memory");
*hash = NULL;
return -1;
}
return 0;
}
static int
tls_get_peer_cert_issuer(struct tls *ctx, char **issuer)
{
X509_NAME *name = NULL;
*issuer = NULL;
if (ctx->ssl_peer_cert == NULL)
return (-1);
if ((name = X509_get_issuer_name(ctx->ssl_peer_cert)) == NULL)
return (-1);
*issuer = X509_NAME_oneline(name, 0, 0);
if (*issuer == NULL)
return (-1);
return (0);
}
static int
tls_get_peer_cert_subject(struct tls *ctx, char **subject)
{
X509_NAME *name = NULL;
*subject = NULL;
if (ctx->ssl_peer_cert == NULL)
return (-1);
if ((name = X509_get_subject_name(ctx->ssl_peer_cert)) == NULL)
return (-1);
*subject = X509_NAME_oneline(name, 0, 0);
if (*subject == NULL)
return (-1);
return (0);
}
static int
tls_get_peer_cert_times(struct tls *ctx, time_t *notbefore,
time_t *notafter)
{
struct tm before_tm, after_tm;
ASN1_TIME *before, *after;
if (ctx->ssl_peer_cert == NULL)
return (-1);
if ((before = X509_get_notBefore(ctx->ssl_peer_cert)) == NULL)
goto err;
if ((after = X509_get_notAfter(ctx->ssl_peer_cert)) == NULL)
goto err;
if (ASN1_time_parse(before->data, before->length, &before_tm, 0) == -1)
goto err;
if (ASN1_time_parse(after->data, after->length, &after_tm, 0) == -1)
goto err;
if (!ASN1_time_tm_clamp_notafter(&after_tm))
goto err;
if ((*notbefore = timegm(&before_tm)) == -1)
goto err;
if ((*notafter = timegm(&after_tm)) == -1)
goto err;
return (0);
err:
return (-1);
}
static int
tls_get_peer_cert_info(struct tls *ctx)
{
if (ctx->ssl_peer_cert == NULL)
return (0);
if (tls_get_peer_cert_hash(ctx, &ctx->conninfo->hash) == -1)
goto err;
if (tls_get_peer_cert_subject(ctx, &ctx->conninfo->subject) == -1)
goto err;
if (tls_get_peer_cert_issuer(ctx, &ctx->conninfo->issuer) == -1)
goto err;
if (tls_get_peer_cert_times(ctx, &ctx->conninfo->notbefore,
&ctx->conninfo->notafter) == -1)
goto err;
return (0);
err:
return (-1);
}
static int
tls_conninfo_alpn_proto(struct tls *ctx)
{
const unsigned char *p;
unsigned int len;
free(ctx->conninfo->alpn);
ctx->conninfo->alpn = NULL;
SSL_get0_alpn_selected(ctx->ssl_conn, &p, &len);
if (len > 0) {
if ((ctx->conninfo->alpn = malloc(len + 1)) == NULL)
return (-1);
memcpy(ctx->conninfo->alpn, p, len);
ctx->conninfo->alpn[len] = '\0';
}
return (0);
}
static int
tls_conninfo_cert_pem(struct tls *ctx)
{
int i, rv = -1;
BIO *membio = NULL;
BUF_MEM *bptr = NULL;
if (ctx->ssl_peer_cert == NULL)
return 0;
if ((membio = BIO_new(BIO_s_mem()))== NULL)
goto err;
/*
* We have to write the peer cert out separately, because
* the certificate chain may or may not contain it.
*/
if (!PEM_write_bio_X509(membio, ctx->ssl_peer_cert))
goto err;
for (i = 0; i < sk_X509_num(ctx->ssl_peer_chain); i++) {
X509 *chaincert = sk_X509_value(ctx->ssl_peer_chain, i);
if (chaincert != ctx->ssl_peer_cert &&
!PEM_write_bio_X509(membio, chaincert))
goto err;
}
BIO_get_mem_ptr(membio, &bptr);
free(ctx->conninfo->peer_cert);
ctx->conninfo->peer_cert_len = 0;
if ((ctx->conninfo->peer_cert = malloc(bptr->length)) == NULL)
goto err;
ctx->conninfo->peer_cert_len = bptr->length;
memcpy(ctx->conninfo->peer_cert, bptr->data,
ctx->conninfo->peer_cert_len);
/* BIO_free() will kill BUF_MEM - because we have not set BIO_NOCLOSE */
rv = 0;
err:
BIO_free(membio);
return rv;
}
static int
tls_conninfo_session(struct tls *ctx)
{
ctx->conninfo->session_resumed = SSL_session_reused(ctx->ssl_conn);
return 0;
}
int
tls_conninfo_populate(struct tls *ctx)
{
const char *tmp;
tls_conninfo_free(ctx->conninfo);
if ((ctx->conninfo = calloc(1, sizeof(struct tls_conninfo))) == NULL) {
tls_set_errorx(ctx, "out of memory");
goto err;
}
if (tls_conninfo_alpn_proto(ctx) == -1)
goto err;
if ((tmp = SSL_get_cipher(ctx->ssl_conn)) == NULL)
goto err;
if ((ctx->conninfo->cipher = strdup(tmp)) == NULL)
goto err;
ctx->conninfo->cipher_strength = SSL_get_cipher_bits(ctx->ssl_conn, NULL);
if (ctx->servername != NULL) {
if ((ctx->conninfo->servername =
strdup(ctx->servername)) == NULL)
goto err;
}
if ((tmp = SSL_get_version(ctx->ssl_conn)) == NULL)
goto err;
if ((ctx->conninfo->version = strdup(tmp)) == NULL)
goto err;
if (tls_get_peer_cert_info(ctx) == -1)
goto err;
if (tls_conninfo_cert_pem(ctx) == -1)
goto err;
if (tls_conninfo_session(ctx) == -1)
goto err;
return (0);
err:
tls_conninfo_free(ctx->conninfo);
ctx->conninfo = NULL;
return (-1);
}
void
tls_conninfo_free(struct tls_conninfo *conninfo)
{
if (conninfo == NULL)
return;
free(conninfo->alpn);
free(conninfo->cipher);
free(conninfo->servername);
free(conninfo->version);
free(conninfo->hash);
free(conninfo->issuer);
free(conninfo->subject);
free(conninfo->peer_cert);
free(conninfo);
}
const char *
tls_conn_alpn_selected(struct tls *ctx)
{
if (ctx->conninfo == NULL)
return (NULL);
return (ctx->conninfo->alpn);
}
const char *
tls_conn_cipher(struct tls *ctx)
{
if (ctx->conninfo == NULL)
return (NULL);
return (ctx->conninfo->cipher);
}
int
tls_conn_cipher_strength(struct tls *ctx)
{
if (ctx->conninfo == NULL)
return (0);
return (ctx->conninfo->cipher_strength);
}
const char *
tls_conn_servername(struct tls *ctx)
{
if (ctx->conninfo == NULL)
return (NULL);
return (ctx->conninfo->servername);
}
int
tls_conn_session_resumed(struct tls *ctx)
{
if (ctx->conninfo == NULL)
return (0);
return (ctx->conninfo->session_resumed);
}
const char *
tls_conn_version(struct tls *ctx)
{
if (ctx->conninfo == NULL)
return (NULL);
return (ctx->conninfo->version);
}