* File : $Source: /cvsroot/ijbswa/current/openssl.c,v $
*
* Purpose : File with TLS/SSL extension. Contains methods for
- * creating, using and closing TLS/SSL connections.
+ * creating, using and closing TLS/SSL connections
+ * using OpenSSL (or LibreSSL).
*
* Copyright : Written by and Copyright (c) 2020 Maxim Antonov <mantonov@gmail.com>
* Copyright (C) 2017 Vaclav Svec. FIT CVUT.
#define VALID_DATETIME_FMT "%y%m%d%H%M%SZ"
#define VALID_DATETIME_BUFLEN 16
-static int generate_webpage_certificate(struct client_state *csp);
+static int generate_host_certificate(struct client_state *csp);
static void free_client_ssl_structures(struct client_state *csp);
static void free_server_ssl_structures(struct client_state *csp);
-static int ssl_store_cert(struct client_state *csp, X509* crt);
+static int ssl_store_cert(struct client_state *csp, X509 *crt);
static void log_ssl_errors(int debuglevel, const char* fmt, ...) __attribute__((format(printf, 2, 3)));
static int ssl_inited = 0;
ret = BIO_read(bio, buf, (int)max_length);
} while (ret <= 0 && BIO_should_retry(bio));
+ if (BIO_get_ssl(bio, &ssl) == 1)
+ {
+ fd = SSL_get_fd(ssl);
+ }
+
if (ret < 0)
{
log_ssl_errors(LOG_LEVEL_ERROR,
return -1;
}
- if (BIO_get_ssl(bio, &ssl) == 1)
- {
- fd = SSL_get_fd(ssl);
- }
-
log_error(LOG_LEVEL_RECEIVED, "TLS from socket %d: %N",
fd, ret, buf);
* Returns : 0 on success and negative value on error
*
*********************************************************************/
-static int ssl_store_cert(struct client_state *csp, X509* crt)
+static int ssl_store_cert(struct client_state *csp, X509 *crt)
{
- long len = 0;
+ long len;
struct certs_chain *last = &(csp->server_certs_chain);
int ret = 0;
BIO *bio = BIO_new(BIO_s_mem());
EVP_PKEY *pkey = NULL;
- char *bio_mem_data = 0;
+ char *bio_mem_data = NULL;
char *encoded_text;
long l;
const ASN1_INTEGER *bs;
if (!bio)
{
- log_ssl_errors(LOG_LEVEL_ERROR, "BIO_new_mem_buf() failed");
+ log_ssl_errors(LOG_LEVEL_ERROR, "BIO_new() failed");
return -1;
}
last->next = malloc_or_die(sizeof(struct certs_chain));
last->next->next = NULL;
memset(last->next->info_buf, 0, sizeof(last->next->info_buf));
- memset(last->next->file_buf, 0, sizeof(last->next->file_buf));
+ last->next->file_buf = NULL;
/*
* Saving certificate file into buffer
*/
if (!PEM_write_bio_X509(bio, crt))
{
- log_ssl_errors(LOG_LEVEL_ERROR, "PEM_write_X509() failed");
+ log_ssl_errors(LOG_LEVEL_ERROR, "PEM_write_bio_X509() failed");
ret = -1;
goto exit;
}
len = BIO_get_mem_data(bio, &bio_mem_data);
- if (len > (sizeof(last->file_buf) - 1))
+ last->file_buf = malloc((size_t)len + 1);
+ if (last->file_buf == NULL)
{
log_error(LOG_LEVEL_ERROR,
- "X509 PEM cert len %ld is larger than buffer len %lu",
- len, sizeof(last->file_buf) - 1);
- len = sizeof(last->file_buf) - 1;
+ "Failed to allocate %lu bytes to store the X509 PEM certificate",
+ len + 1);
+ ret = -1;
+ goto exit;
}
strncpy(last->file_buf, bio_mem_data, (size_t)len);
+ last->file_buf[len] = '\0';
BIO_free(bio);
bio = BIO_new(BIO_s_mem());
if (!bio)
{
- log_ssl_errors(LOG_LEVEL_ERROR, "BIO_new_mem_buf() failed");
+ log_ssl_errors(LOG_LEVEL_ERROR, "BIO_new() failed");
ret = -1;
goto exit;
}
ul = (unsigned long)l;
neg = "";
}
- if (BIO_printf(bio, " %s%lu (%s0x%lx)\n", neg, ul, neg, ul) <= 0)
+ if (BIO_printf(bio, "%s%lu (%s0x%lx)\n", neg, ul, neg, ul) <= 0)
{
log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for serial failed");
ret = -1;
}
else
{
+ int i;
if (bs->type == V_ASN1_NEG_INTEGER)
{
if (BIO_puts(bio, " (Negative)") < 0)
goto exit;
}
}
- for (int i = 0; i < bs->length; i++)
+ for (i = 0; i < bs->length; i++)
{
if (BIO_printf(bio, "%02x%c", bs->data[i],
((i + 1 == bs->length) ? '\n' : ':')) <= 0)
case EVP_PKEY_DSA:
ret = BIO_printf(bio, "\n%-" BC "s: %d bits", "DSA key size", EVP_PKEY_bits(pkey));
break;
+ case EVP_PKEY_EC:
+ ret = BIO_printf(bio, "\n%-" BC "s: %d bits", "EC key size", EVP_PKEY_bits(pkey));
+ break;
default:
- ret = BIO_printf(bio, "\n%-" BC "s: %d bits", "non-RSA/DSA key size", EVP_PKEY_bits(pkey));
+ ret = BIO_printf(bio, "\n%-" BC "s: %d bits", "non-RSA/DSA/EC key size",
+ EVP_PKEY_bits(pkey));
break;
}
if (ret <= 0)
BIO_write(bio, &zero, 1);
len = BIO_get_mem_data(bio, &bio_mem_data);
+ if (len <= 0)
+ {
+ log_error(LOG_LEVEL_ERROR, "BIO_get_mem_data() returned %ld "
+ "while gathering certificate information", len);
+ ret = -1;
+ goto exit;
+ }
encoded_text = html_encode(bio_mem_data);
if (encoded_text == NULL)
{
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
*
- * Returns : 1 => Error while creating hash
+ * Returns : -1 => Error while creating hash
* 0 => Hash created successfully
*
*********************************************************************/
struct ssl_attr *ssl_attr = &csp->ssl_client_attr;
/* Paths to certificates file and key file */
char *key_file = NULL;
- char *ca_file = NULL;
char *cert_file = NULL;
int ret = 0;
SSL *ssl;
/*
* Preparing paths to certificates files and key file
*/
- ca_file = csp->config->ca_cert_file;
cert_file = make_certs_path(csp->config->certificate_directory,
(const char *)csp->http->hash_of_host_hex, CERT_FILE_TYPE);
key_file = make_certs_path(csp->config->certificate_directory,
*/
privoxy_mutex_lock(&certificate_mutex);
- ret = generate_webpage_certificate(csp);
+ ret = generate_host_certificate(csp);
if (ret < 0)
{
log_error(LOG_LEVEL_ERROR,
- "Generate_webpage_certificate failed: %d", ret);
+ "generate_host_certificate failed: %d", ret);
privoxy_mutex_unlock(&certificate_mutex);
ret = -1;
goto exit;
goto exit;
}
- log_error(LOG_LEVEL_CONNECT, "Client successfully connected over TLS/SSL");
+ log_error(LOG_LEVEL_CONNECT, "Client successfully connected over %s (%s).",
+ SSL_get_version(ssl), SSL_get_cipher_name(ssl));
+
csp->ssl_with_client_is_opened = 1;
ret = 0;
goto exit;
}
+ /*
+ * XXX: Do we really have to do this always?
+ * Probably it's sufficient to do if the verification fails
+ * in which case we're sending the certificates to the client.
+ */
chain = SSL_get_peer_cert_chain(ssl);
if (chain)
{
- for (int i = 0; i < sk_X509_num(chain); i++)
+ int i;
+ for (i = 0; i < sk_X509_num(chain); i++)
{
if (ssl_store_cert(csp, sk_X509_value(chain, i)) != 0)
{
}
}
- log_error(LOG_LEVEL_CONNECT, "Server successfully connected over TLS/SSL");
+ log_error(LOG_LEVEL_CONNECT, "Server successfully connected over %s (%s).",
+ SSL_get_version(ssl), SSL_get_cipher_name(ssl));
/*
* Server certificate chain is valid, so we can clean
extern int ssl_base64_encode(unsigned char *dst, size_t dlen, size_t *olen,
const unsigned char *src, size_t slen)
{
- *olen = 4 * ((slen/3) + ((slen%3) ? 1 : 0)) + 1;
- if (*olen < dlen)
+ *olen = 4 * ((slen/3) + ((slen%3) ? 1 : 0)) + 1;
+ if (*olen > dlen)
{
return ENOBUFS;
}
static int generate_key(struct client_state *csp, char **key_buf)
{
int ret = 0;
- char* key_file_path = NULL;
- BIGNUM *exp = BN_new();
- RSA *rsa = RSA_new();
- EVP_PKEY *key = EVP_PKEY_new();
+ char* key_file_path;
+ BIGNUM *exp;
+ RSA *rsa;
+ EVP_PKEY *key;
- if (exp == NULL || rsa == NULL || key == NULL)
+ key_file_path = make_certs_path(csp->config->certificate_directory,
+ (char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
+ if (key_file_path == NULL)
{
- log_ssl_errors(LOG_LEVEL_ERROR, "RSA key memory allocation failure");
- ret = -1;
- goto exit;
+ return -1;
}
- if (BN_set_word(exp, RSA_KEY_PUBLIC_EXPONENT) != 1)
+ /*
+ * Test if key already exists. If so, we don't have to create it again.
+ */
+ if (file_exists(key_file_path) == 1)
{
- log_ssl_errors(LOG_LEVEL_ERROR, "Setting RSA key exponent failed");
- ret = -1;
- goto exit;
+ freez(key_file_path);
+ return 0;
}
- key_file_path = make_certs_path(csp->config->certificate_directory,
- (char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
- if (key_file_path == NULL)
+ exp = BN_new();
+ rsa = RSA_new();
+ key = EVP_PKEY_new();
+ if (exp == NULL || rsa == NULL || key == NULL)
{
+ log_ssl_errors(LOG_LEVEL_ERROR, "RSA key memory allocation failure");
ret = -1;
goto exit;
}
- /*
- * Test if key already exists. If so, we don't have to create it again.
- */
- if (file_exists(key_file_path) == 1)
+ if (BN_set_word(exp, RSA_KEY_PUBLIC_EXPONENT) != 1)
{
- ret = 0;
+ log_ssl_errors(LOG_LEVEL_ERROR, "Setting RSA key exponent failed");
+ ret = -1;
goto exit;
}
* pointer to certificate instance otherwise
*
*********************************************************************/
-static X509* ssl_certificate_load(const char *cert_path)
+static X509 *ssl_certificate_load(const char *cert_path)
{
X509 *cert = NULL;
FILE *cert_f = NULL;
if (!(cert = ssl_certificate_load(cert_file)))
{
- log_ssl_errors(LOG_LEVEL_ERROR,
- "Error reading certificate file %s", cert_file);
return 1;
}
* 3 : nid = OpenSSL NID
* 4 : value = extension value
*
- * Returns : 0 => Error while setting extensuon data
+ * Returns : 0 => Error while setting extension data
* 1 => It worked
*
*********************************************************************/
/*********************************************************************
*
- * Function : generate_webpage_certificate
+ * Function : generate_host_certificate
*
* Description : Creates certificate file in presetted directory.
* If certificate already exists, no other certificate
* 1 => Certificate created
*
*********************************************************************/
-static int generate_webpage_certificate(struct client_state *csp)
+static int generate_host_certificate(struct client_state *csp)
{
char *key_buf = NULL; /* Buffer for created key */
X509 *issuer_cert = NULL;
cert_options cert_opt;
char cert_valid_from[VALID_DATETIME_BUFLEN];
char cert_valid_to[VALID_DATETIME_BUFLEN];
+ const char *common_name;
+ enum { CERT_PARAM_COMMON_NAME_MAX = 64 };
/* Paths to keys and certificates needed to create certificate */
cert_opt.issuer_key = NULL;
return -1;
}
+ if (enforce_sane_certificate_state(cert_opt.output_file,
+ cert_opt.subject_key))
+ {
+ freez(cert_opt.output_file);
+ freez(cert_opt.subject_key);
+
+ return -1;
+ }
+
if (file_exists(cert_opt.output_file) == 1)
{
/* The file exists, but is it valid? */
subject_name = X509_NAME_new();
if (!subject_name)
{
- log_ssl_errors(LOG_LEVEL_ERROR, "RSA key memory allocation failure");
+ log_ssl_errors(LOG_LEVEL_ERROR, "X509 memory allocation failure");
ret = -1;
goto exit;
}
+ /*
+ * Make sure OpenSSL doesn't reject the common name due to its length.
+ * The clients should only care about the Subject Alternative Name anyway
+ * and we always use the real host name for that.
+ */
+ common_name = (strlen(csp->http->host) > CERT_PARAM_COMMON_NAME_MAX) ?
+ CGI_SITE_2_HOST : csp->http->host;
if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_COMMON_NAME_FCODE,
- MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
+ MBSTRING_ASC, (void *)common_name, -1, -1, 0))
{
log_ssl_errors(LOG_LEVEL_ERROR,
"X509 subject name (code: %s, val: %s) error",
goto exit;
}
if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_ORGANIZATION_FCODE,
- MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
+ MBSTRING_ASC, (void *)common_name, -1, -1, 0))
{
log_ssl_errors(LOG_LEVEL_ERROR,
"X509 subject name (code: %s, val: %s) error",
goto exit;
}
if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_ORG_UNIT_FCODE,
- MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
+ MBSTRING_ASC, (void *)common_name, -1, -1, 0))
{
log_ssl_errors(LOG_LEVEL_ERROR,
"X509 subject name (code: %s, val: %s) error",
{
log_ssl_errors(LOG_LEVEL_ERROR,
"X509 subject name (code: %s, val: %s) error",
- CERT_PARAM_COUNTRY_FCODE, csp->http->host);
+ CERT_PARAM_COUNTRY_FCODE, CERT_PARAM_COUNTRY_CODE);
ret = -1;
goto exit;
}
serial_num = BN_new();
if (!serial_num)
{
- log_error(LOG_LEVEL_ERROR, "generate_webpage_certificate: memory error");
+ log_error(LOG_LEVEL_ERROR, "generate_host_certificate: memory error");
ret = -1;
goto exit;
}
}
+#ifdef FEATURE_GRACEFUL_TERMINATION
/*********************************************************************
*
* Function : ssl_release
{
if (ssl_inited == 1)
{
+#if OPENSSL_VERSION_NUMBER >= 0x1000200fL
+#ifndef LIBRESSL_VERSION_NUMBER
#ifndef OPENSSL_NO_COMP
SSL_COMP_free_compression_methods();
+#endif
+#endif
#endif
CONF_modules_free();
CONF_modules_unload(1);
CRYPTO_cleanup_all_ex_data();
}
}
-
+#endif /* def FEATURE_GRACEFUL_TERMINATION */
projects / privoxy.git / blobdiff