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curl/lib/vtls/vtls.c

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C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
/* This file is for implementing all "generic" SSL functions that all libcurl
internals should use. It is then responsible for calling the proper
"backend" function.
SSL-functions in libcurl should call functions in this source file, and not
to any specific SSL-layer.
Curl_ssl_ - prefix for generic ones
Curl_ossl_ - prefix for OpenSSL ones
Curl_gtls_ - prefix for GnuTLS ones
Curl_nss_ - prefix for NSS ones
Curl_gskit_ - prefix for GSKit ones
Curl_polarssl_ - prefix for PolarSSL ones
Curl_cyassl_ - prefix for CyaSSL ones
Curl_schannel_ - prefix for Schannel SSPI ones
Curl_darwinssl_ - prefix for SecureTransport (Darwin) ones
Note that this source code uses curlssl_* functions, and they are all
defines/macros #defined by the lib-specific header files.
"SSL/TLS Strong Encryption: An Introduction"
https://httpd.apache.org/docs/2.0/ssl/ssl_intro.html
*/
#include "curl_setup.h"
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include "urldata.h"
#include "vtls.h" /* generic SSL protos etc */
#include "slist.h"
#include "sendf.h"
#include "strcase.h"
#include "url.h"
#include "progress.h"
#include "share.h"
#include "multiif.h"
#include "timeval.h"
#include "curl_md5.h"
#include "warnless.h"
#include "curl_base64.h"
#include "curl_printf.h"
/* The last #include files should be: */
#include "curl_memory.h"
#include "memdebug.h"
/* convenience macro to check if this handle is using a shared SSL session */
#define SSLSESSION_SHARED(data) (data->share && \
(data->share->specifier & \
(1<<CURL_LOCK_DATA_SSL_SESSION)))
#define CLONE_STRING(var) \
if(source->var) { \
dest->var = strdup(source->var); \
if(!dest->var) \
return FALSE; \
} \
else \
dest->var = NULL;
bool
Curl_ssl_config_matches(struct ssl_primary_config* data,
struct ssl_primary_config* needle)
{
if((data->version == needle->version) &&
(data->version_max == needle->version_max) &&
(data->verifypeer == needle->verifypeer) &&
(data->verifyhost == needle->verifyhost) &&
Curl_safe_strcasecompare(data->CApath, needle->CApath) &&
Curl_safe_strcasecompare(data->CAfile, needle->CAfile) &&
Curl_safe_strcasecompare(data->clientcert, needle->clientcert) &&
Curl_safe_strcasecompare(data->cipher_list, needle->cipher_list))
return TRUE;
return FALSE;
}
bool
Curl_clone_primary_ssl_config(struct ssl_primary_config *source,
struct ssl_primary_config *dest)
{
dest->verifyhost = source->verifyhost;
dest->verifypeer = source->verifypeer;
dest->version = source->version;
dest->version_max = source->version_max;
CLONE_STRING(CAfile);
CLONE_STRING(CApath);
CLONE_STRING(cipher_list);
CLONE_STRING(egdsocket);
CLONE_STRING(random_file);
CLONE_STRING(clientcert);
/* Disable dest sessionid cache if a client cert is used, CVE-2016-5419. */
dest->sessionid = (dest->clientcert ? false : source->sessionid);
return TRUE;
}
void Curl_free_primary_ssl_config(struct ssl_primary_config* sslc)
{
Curl_safefree(sslc->CAfile);
Curl_safefree(sslc->CApath);
Curl_safefree(sslc->cipher_list);
Curl_safefree(sslc->egdsocket);
Curl_safefree(sslc->random_file);
Curl_safefree(sslc->clientcert);
}
int Curl_ssl_backend(void)
{
return (int)CURL_SSL_BACKEND;
}
#ifdef USE_SSL
/* "global" init done? */
static bool init_ssl=FALSE;
/**
* Global SSL init
*
* @retval 0 error initializing SSL
* @retval 1 SSL initialized successfully
*/
int Curl_ssl_init(void)
{
/* make sure this is only done once */
if(init_ssl)
return 1;
init_ssl = TRUE; /* never again */
return curlssl_init();
}
/* Global cleanup */
void Curl_ssl_cleanup(void)
{
if(init_ssl) {
/* only cleanup if we did a previous init */
curlssl_cleanup();
init_ssl = FALSE;
}
}
static bool ssl_prefs_check(struct Curl_easy *data)
{
/* check for CURLOPT_SSLVERSION invalid parameter value */
const long sslver = data->set.ssl.primary.version;
if((sslver < 0) || (sslver >= CURL_SSLVERSION_LAST)) {
failf(data, "Unrecognized parameter value passed via CURLOPT_SSLVERSION");
return FALSE;
}
switch(data->set.ssl.primary.version_max) {
case CURL_SSLVERSION_MAX_NONE:
case CURL_SSLVERSION_MAX_DEFAULT:
break;
default:
if((data->set.ssl.primary.version_max >> 16) < sslver) {
failf(data, "CURL_SSLVERSION_MAX incompatible with CURL_SSLVERSION");
return FALSE;
}
}
return TRUE;
}
static CURLcode
ssl_connect_init_proxy(struct connectdata *conn, int sockindex)
{
DEBUGASSERT(conn->bits.proxy_ssl_connected[sockindex]);
if(ssl_connection_complete == conn->ssl[sockindex].state &&
!conn->proxy_ssl[sockindex].use) {
#if defined(HTTPS_PROXY_SUPPORT)
conn->proxy_ssl[sockindex] = conn->ssl[sockindex];
memset(&conn->ssl[sockindex], 0, sizeof(conn->ssl[sockindex]));
#else
return CURLE_NOT_BUILT_IN;
#endif
}
return CURLE_OK;
}
CURLcode
Curl_ssl_connect(struct connectdata *conn, int sockindex)
{
CURLcode result;
if(conn->bits.proxy_ssl_connected[sockindex]) {
result = ssl_connect_init_proxy(conn, sockindex);
if(result)
return result;
}
if(!ssl_prefs_check(conn->data))
return CURLE_SSL_CONNECT_ERROR;
/* mark this is being ssl-enabled from here on. */
conn->ssl[sockindex].use = TRUE;
conn->ssl[sockindex].state = ssl_connection_negotiating;
result = curlssl_connect(conn, sockindex);
if(!result)
Curl_pgrsTime(conn->data, TIMER_APPCONNECT); /* SSL is connected */
return result;
}
CURLcode
Curl_ssl_connect_nonblocking(struct connectdata *conn, int sockindex,
bool *done)
{
CURLcode result;
if(conn->bits.proxy_ssl_connected[sockindex]) {
result = ssl_connect_init_proxy(conn, sockindex);
if(result)
return result;
}
if(!ssl_prefs_check(conn->data))
return CURLE_SSL_CONNECT_ERROR;
/* mark this is being ssl requested from here on. */
conn->ssl[sockindex].use = TRUE;
#ifdef curlssl_connect_nonblocking
result = curlssl_connect_nonblocking(conn, sockindex, done);
#else
*done = TRUE; /* fallback to BLOCKING */
result = curlssl_connect(conn, sockindex);
#endif /* non-blocking connect support */
if(!result && *done)
Curl_pgrsTime(conn->data, TIMER_APPCONNECT); /* SSL is connected */
return result;
}
/*
* Lock shared SSL session data
*/
void Curl_ssl_sessionid_lock(struct connectdata *conn)
{
if(SSLSESSION_SHARED(conn->data))
Curl_share_lock(conn->data,
CURL_LOCK_DATA_SSL_SESSION, CURL_LOCK_ACCESS_SINGLE);
}
/*
* Unlock shared SSL session data
*/
void Curl_ssl_sessionid_unlock(struct connectdata *conn)
{
if(SSLSESSION_SHARED(conn->data))
Curl_share_unlock(conn->data, CURL_LOCK_DATA_SSL_SESSION);
}
/*
* Check if there's a session ID for the given connection in the cache, and if
* there's one suitable, it is provided. Returns TRUE when no entry matched.
*/
bool Curl_ssl_getsessionid(struct connectdata *conn,
void **ssl_sessionid,
size_t *idsize, /* set 0 if unknown */
int sockindex)
{
struct curl_ssl_session *check;
struct Curl_easy *data = conn->data;
size_t i;
long *general_age;
bool no_match = TRUE;
const bool isProxy = CONNECT_PROXY_SSL();
struct ssl_primary_config * const ssl_config = isProxy ?
&conn->proxy_ssl_config :
&conn->ssl_config;
const char * const name = isProxy ? conn->http_proxy.host.name :
conn->host.name;
int port = isProxy ? (int)conn->port : conn->remote_port;
*ssl_sessionid = NULL;
DEBUGASSERT(SSL_SET_OPTION(primary.sessionid));
if(!SSL_SET_OPTION(primary.sessionid))
/* session ID re-use is disabled */
return TRUE;
/* Lock if shared */
if(SSLSESSION_SHARED(data))
general_age = &data->share->sessionage;
else
general_age = &data->state.sessionage;
for(i = 0; i < data->set.general_ssl.max_ssl_sessions; i++) {
check = &data->state.session[i];
if(!check->sessionid)
/* not session ID means blank entry */
continue;
if(strcasecompare(name, check->name) &&
((!conn->bits.conn_to_host && !check->conn_to_host) ||
(conn->bits.conn_to_host && check->conn_to_host &&
strcasecompare(conn->conn_to_host.name, check->conn_to_host))) &&
((!conn->bits.conn_to_port && check->conn_to_port == -1) ||
(conn->bits.conn_to_port && check->conn_to_port != -1 &&
conn->conn_to_port == check->conn_to_port)) &&
(port == check->remote_port) &&
strcasecompare(conn->handler->scheme, check->scheme) &&
Curl_ssl_config_matches(ssl_config, &check->ssl_config)) {
/* yes, we have a session ID! */
(*general_age)++; /* increase general age */
check->age = *general_age; /* set this as used in this age */
*ssl_sessionid = check->sessionid;
if(idsize)
*idsize = check->idsize;
no_match = FALSE;
break;
}
}
return no_match;
}
/*
* Kill a single session ID entry in the cache.
*/
void Curl_ssl_kill_session(struct curl_ssl_session *session)
{
if(session->sessionid) {
/* defensive check */
/* free the ID the SSL-layer specific way */
curlssl_session_free(session->sessionid);
session->sessionid = NULL;
session->age = 0; /* fresh */
Curl_free_primary_ssl_config(&session->ssl_config);
Curl_safefree(session->name);
Curl_safefree(session->conn_to_host);
}
}
/*
* Delete the given session ID from the cache.
*/
void Curl_ssl_delsessionid(struct connectdata *conn, void *ssl_sessionid)
{
size_t i;
struct Curl_easy *data=conn->data;
for(i = 0; i < data->set.general_ssl.max_ssl_sessions; i++) {
struct curl_ssl_session *check = &data->state.session[i];
if(check->sessionid == ssl_sessionid) {
Curl_ssl_kill_session(check);
break;
}
}
}
/*
* Store session id in the session cache. The ID passed on to this function
* must already have been extracted and allocated the proper way for the SSL
* layer. Curl_XXXX_session_free() will be called to free/kill the session ID
* later on.
*/
CURLcode Curl_ssl_addsessionid(struct connectdata *conn,
void *ssl_sessionid,
size_t idsize,
int sockindex)
{
size_t i;
struct Curl_easy *data=conn->data; /* the mother of all structs */
struct curl_ssl_session *store = &data->state.session[0];
long oldest_age=data->state.session[0].age; /* zero if unused */
char *clone_host;
char *clone_conn_to_host;
int conn_to_port;
long *general_age;
const bool isProxy = CONNECT_PROXY_SSL();
struct ssl_primary_config * const ssl_config = isProxy ?
&conn->proxy_ssl_config :
&conn->ssl_config;
DEBUGASSERT(SSL_SET_OPTION(primary.sessionid));
clone_host = strdup(isProxy ? conn->http_proxy.host.name : conn->host.name);
if(!clone_host)
return CURLE_OUT_OF_MEMORY; /* bail out */
if(conn->bits.conn_to_host) {
clone_conn_to_host = strdup(conn->conn_to_host.name);
if(!clone_conn_to_host) {
free(clone_host);
return CURLE_OUT_OF_MEMORY; /* bail out */
}
}
else
clone_conn_to_host = NULL;
if(conn->bits.conn_to_port)
conn_to_port = conn->conn_to_port;
else
conn_to_port = -1;
/* Now we should add the session ID and the host name to the cache, (remove
the oldest if necessary) */
/* If using shared SSL session, lock! */
if(SSLSESSION_SHARED(data)) {
general_age = &data->share->sessionage;
}
else {
general_age = &data->state.sessionage;
}
/* find an empty slot for us, or find the oldest */
for(i = 1; (i < data->set.general_ssl.max_ssl_sessions) &&
data->state.session[i].sessionid; i++) {
if(data->state.session[i].age < oldest_age) {
oldest_age = data->state.session[i].age;
store = &data->state.session[i];
}
}
if(i == data->set.general_ssl.max_ssl_sessions)
/* cache is full, we must "kill" the oldest entry! */
Curl_ssl_kill_session(store);
else
store = &data->state.session[i]; /* use this slot */
/* now init the session struct wisely */
store->sessionid = ssl_sessionid;
store->idsize = idsize;
store->age = *general_age; /* set current age */
/* free it if there's one already present */
free(store->name);
free(store->conn_to_host);
store->name = clone_host; /* clone host name */
store->conn_to_host = clone_conn_to_host; /* clone connect to host name */
store->conn_to_port = conn_to_port; /* connect to port number */
/* port number */
store->remote_port = isProxy ? (int)conn->port : conn->remote_port;
store->scheme = conn->handler->scheme;
if(!Curl_clone_primary_ssl_config(ssl_config, &store->ssl_config)) {
store->sessionid = NULL; /* let caller free sessionid */
free(clone_host);
free(clone_conn_to_host);
return CURLE_OUT_OF_MEMORY;
}
return CURLE_OK;
}
void Curl_ssl_close_all(struct Curl_easy *data)
{
size_t i;
/* kill the session ID cache if not shared */
if(data->state.session && !SSLSESSION_SHARED(data)) {
for(i = 0; i < data->set.general_ssl.max_ssl_sessions; i++)
/* the single-killer function handles empty table slots */
Curl_ssl_kill_session(&data->state.session[i]);
/* free the cache data */
Curl_safefree(data->state.session);
}
curlssl_close_all(data);
}
#if defined(USE_OPENSSL) || defined(USE_GNUTLS) || defined(USE_SCHANNEL) || \
defined(USE_DARWINSSL) || defined(USE_POLARSSL) || defined(USE_NSS) || \
defined(USE_MBEDTLS)
int Curl_ssl_getsock(struct connectdata *conn, curl_socket_t *socks,
int numsocks)
{
struct ssl_connect_data *connssl = &conn->ssl[FIRSTSOCKET];
if(!numsocks)
return GETSOCK_BLANK;
if(connssl->connecting_state == ssl_connect_2_writing) {
/* write mode */
socks[0] = conn->sock[FIRSTSOCKET];
return GETSOCK_WRITESOCK(0);
}
if(connssl->connecting_state == ssl_connect_2_reading) {
/* read mode */
socks[0] = conn->sock[FIRSTSOCKET];
return GETSOCK_READSOCK(0);
}
return GETSOCK_BLANK;
}
#else
int Curl_ssl_getsock(struct connectdata *conn,
curl_socket_t *socks,
int numsocks)
{
(void)conn;
(void)socks;
(void)numsocks;
return GETSOCK_BLANK;
}
/* USE_OPENSSL || USE_GNUTLS || USE_SCHANNEL || USE_DARWINSSL || USE_NSS */
#endif
void Curl_ssl_close(struct connectdata *conn, int sockindex)
{
DEBUGASSERT((sockindex <= 1) && (sockindex >= -1));
curlssl_close(conn, sockindex);
}
CURLcode Curl_ssl_shutdown(struct connectdata *conn, int sockindex)
{
if(curlssl_shutdown(conn, sockindex))
return CURLE_SSL_SHUTDOWN_FAILED;
conn->ssl[sockindex].use = FALSE; /* get back to ordinary socket usage */
conn->ssl[sockindex].state = ssl_connection_none;
conn->recv[sockindex] = Curl_recv_plain;
conn->send[sockindex] = Curl_send_plain;
return CURLE_OK;
}
/* Selects an SSL crypto engine
*/
CURLcode Curl_ssl_set_engine(struct Curl_easy *data, const char *engine)
{
return curlssl_set_engine(data, engine);
}
/* Selects the default SSL crypto engine
*/
CURLcode Curl_ssl_set_engine_default(struct Curl_easy *data)
{
return curlssl_set_engine_default(data);
}
/* Return list of OpenSSL crypto engine names. */
struct curl_slist *Curl_ssl_engines_list(struct Curl_easy *data)
{
return curlssl_engines_list(data);
}
/*
* This sets up a session ID cache to the specified size. Make sure this code
* is agnostic to what underlying SSL technology we use.
*/
CURLcode Curl_ssl_initsessions(struct Curl_easy *data, size_t amount)
{
struct curl_ssl_session *session;
if(data->state.session)
/* this is just a precaution to prevent multiple inits */
return CURLE_OK;
session = calloc(amount, sizeof(struct curl_ssl_session));
if(!session)
return CURLE_OUT_OF_MEMORY;
/* store the info in the SSL section */
data->set.general_ssl.max_ssl_sessions = amount;
data->state.session = session;
data->state.sessionage = 1; /* this is brand new */
return CURLE_OK;
}
size_t Curl_ssl_version(char *buffer, size_t size)
{
return curlssl_version(buffer, size);
}
/*
* This function tries to determine connection status.
*
* Return codes:
* 1 means the connection is still in place
* 0 means the connection has been closed
* -1 means the connection status is unknown
*/
int Curl_ssl_check_cxn(struct connectdata *conn)
{
return curlssl_check_cxn(conn);
}
bool Curl_ssl_data_pending(const struct connectdata *conn,
int connindex)
{
return curlssl_data_pending(conn, connindex);
}
void Curl_ssl_free_certinfo(struct Curl_easy *data)
{
int i;
struct curl_certinfo *ci = &data->info.certs;
if(ci->num_of_certs) {
/* free all individual lists used */
for(i=0; i<ci->num_of_certs; i++) {
curl_slist_free_all(ci->certinfo[i]);
ci->certinfo[i] = NULL;
}
free(ci->certinfo); /* free the actual array too */
ci->certinfo = NULL;
ci->num_of_certs = 0;
}
}
CURLcode Curl_ssl_init_certinfo(struct Curl_easy *data, int num)
{
struct curl_certinfo *ci = &data->info.certs;
struct curl_slist **table;
/* Free any previous certificate information structures */
Curl_ssl_free_certinfo(data);
/* Allocate the required certificate information structures */
table = calloc((size_t) num, sizeof(struct curl_slist *));
if(!table)
return CURLE_OUT_OF_MEMORY;
ci->num_of_certs = num;
ci->certinfo = table;
return CURLE_OK;
}
/*
* 'value' is NOT a zero terminated string
*/
CURLcode Curl_ssl_push_certinfo_len(struct Curl_easy *data,
int certnum,
const char *label,
const char *value,
size_t valuelen)
{
struct curl_certinfo *ci = &data->info.certs;
char *output;
struct curl_slist *nl;
CURLcode result = CURLE_OK;
size_t labellen = strlen(label);
size_t outlen = labellen + 1 + valuelen + 1; /* label:value\0 */
output = malloc(outlen);
if(!output)
return CURLE_OUT_OF_MEMORY;
/* sprintf the label and colon */
snprintf(output, outlen, "%s:", label);
/* memcpy the value (it might not be zero terminated) */
memcpy(&output[labellen+1], value, valuelen);
/* zero terminate the output */
output[labellen + 1 + valuelen] = 0;
nl = Curl_slist_append_nodup(ci->certinfo[certnum], output);
if(!nl) {
free(output);
curl_slist_free_all(ci->certinfo[certnum]);
result = CURLE_OUT_OF_MEMORY;
}
ci->certinfo[certnum] = nl;
return result;
}
/*
* This is a convenience function for push_certinfo_len that takes a zero
* terminated value.
*/
CURLcode Curl_ssl_push_certinfo(struct Curl_easy *data,
int certnum,
const char *label,
const char *value)
{
size_t valuelen = strlen(value);
return Curl_ssl_push_certinfo_len(data, certnum, label, value, valuelen);
}
CURLcode Curl_ssl_random(struct Curl_easy *data,
unsigned char *entropy,
size_t length)
{
return curlssl_random(data, entropy, length);
}
/*
* Public key pem to der conversion
*/
static CURLcode pubkey_pem_to_der(const char *pem,
unsigned char **der, size_t *der_len)
{
char *stripped_pem, *begin_pos, *end_pos;
size_t pem_count, stripped_pem_count = 0, pem_len;
CURLcode result;
/* if no pem, exit. */
if(!pem)
return CURLE_BAD_CONTENT_ENCODING;
begin_pos = strstr(pem, "-----BEGIN PUBLIC KEY-----");
if(!begin_pos)
return CURLE_BAD_CONTENT_ENCODING;
pem_count = begin_pos - pem;
/* Invalid if not at beginning AND not directly following \n */
if(0 != pem_count && '\n' != pem[pem_count - 1])
return CURLE_BAD_CONTENT_ENCODING;
/* 26 is length of "-----BEGIN PUBLIC KEY-----" */
pem_count += 26;
/* Invalid if not directly following \n */
end_pos = strstr(pem + pem_count, "\n-----END PUBLIC KEY-----");
if(!end_pos)
return CURLE_BAD_CONTENT_ENCODING;
pem_len = end_pos - pem;
stripped_pem = malloc(pem_len - pem_count + 1);
if(!stripped_pem)
return CURLE_OUT_OF_MEMORY;
/*
* Here we loop through the pem array one character at a time between the
* correct indices, and place each character that is not '\n' or '\r'
* into the stripped_pem array, which should represent the raw base64 string
*/
while(pem_count < pem_len) {
if('\n' != pem[pem_count] && '\r' != pem[pem_count])
stripped_pem[stripped_pem_count++] = pem[pem_count];
++pem_count;
}
/* Place the null terminator in the correct place */
stripped_pem[stripped_pem_count] = '\0';
result = Curl_base64_decode(stripped_pem, der, der_len);
Curl_safefree(stripped_pem);
return result;
}
/*
* Generic pinned public key check.
*/
CURLcode Curl_pin_peer_pubkey(struct Curl_easy *data,
const char *pinnedpubkey,
const unsigned char *pubkey, size_t pubkeylen)
{
FILE *fp;
unsigned char *buf = NULL, *pem_ptr = NULL;
long filesize;
size_t size, pem_len;
CURLcode pem_read;
CURLcode result = CURLE_SSL_PINNEDPUBKEYNOTMATCH;
#ifdef curlssl_sha256sum
CURLcode encode;
size_t encodedlen, pinkeylen;
char *encoded, *pinkeycopy, *begin_pos, *end_pos;
unsigned char *sha256sumdigest = NULL;
#endif
/* if a path wasn't specified, don't pin */
if(!pinnedpubkey)
return CURLE_OK;
if(!pubkey || !pubkeylen)
return result;
/* only do this if pinnedpubkey starts with "sha256//", length 8 */
if(strncmp(pinnedpubkey, "sha256//", 8) == 0) {
#ifdef curlssl_sha256sum
/* compute sha256sum of public key */
sha256sumdigest = malloc(SHA256_DIGEST_LENGTH);
if(!sha256sumdigest)
return CURLE_OUT_OF_MEMORY;
curlssl_sha256sum(pubkey, pubkeylen,
sha256sumdigest, SHA256_DIGEST_LENGTH);
encode = Curl_base64_encode(data, (char *)sha256sumdigest,
SHA256_DIGEST_LENGTH, &encoded, &encodedlen);
Curl_safefree(sha256sumdigest);
if(encode)
return encode;
infof(data, "\t public key hash: sha256//%s\n", encoded);
/* it starts with sha256//, copy so we can modify it */
pinkeylen = strlen(pinnedpubkey) + 1;
pinkeycopy = malloc(pinkeylen);
if(!pinkeycopy) {
Curl_safefree(encoded);
return CURLE_OUT_OF_MEMORY;
}
memcpy(pinkeycopy, pinnedpubkey, pinkeylen);
/* point begin_pos to the copy, and start extracting keys */
begin_pos = pinkeycopy;
do {
end_pos = strstr(begin_pos, ";sha256//");
/*
* if there is an end_pos, null terminate,
* otherwise it'll go to the end of the original string
*/
if(end_pos)
end_pos[0] = '\0';
/* compare base64 sha256 digests, 8 is the length of "sha256//" */
if(encodedlen == strlen(begin_pos + 8) &&
!memcmp(encoded, begin_pos + 8, encodedlen)) {
result = CURLE_OK;
break;
}
/*
* change back the null-terminator we changed earlier,
* and look for next begin
*/
if(end_pos) {
end_pos[0] = ';';
begin_pos = strstr(end_pos, "sha256//");
}
} while(end_pos && begin_pos);
Curl_safefree(encoded);
Curl_safefree(pinkeycopy);
#else
/* without sha256 support, this cannot match */
(void)data;
#endif
return result;
}
fp = fopen(pinnedpubkey, "rb");
if(!fp)
return result;
do {
/* Determine the file's size */
if(fseek(fp, 0, SEEK_END))
break;
filesize = ftell(fp);
if(fseek(fp, 0, SEEK_SET))
break;
if(filesize < 0 || filesize > MAX_PINNED_PUBKEY_SIZE)
break;
/*
* if the size of our certificate is bigger than the file
* size then it can't match
*/
size = curlx_sotouz((curl_off_t) filesize);
if(pubkeylen > size)
break;
/*
* Allocate buffer for the pinned key
* With 1 additional byte for null terminator in case of PEM key
*/
buf = malloc(size + 1);
if(!buf)
break;
/* Returns number of elements read, which should be 1 */
if((int) fread(buf, size, 1, fp) != 1)
break;
/* If the sizes are the same, it can't be base64 encoded, must be der */
if(pubkeylen == size) {
if(!memcmp(pubkey, buf, pubkeylen))
result = CURLE_OK;
break;
}
/*
* Otherwise we will assume it's PEM and try to decode it
* after placing null terminator
*/
buf[size] = '\0';
pem_read = pubkey_pem_to_der((const char *)buf, &pem_ptr, &pem_len);
/* if it wasn't read successfully, exit */
if(pem_read)
break;
/*
* if the size of our certificate doesn't match the size of
* the decoded file, they can't be the same, otherwise compare
*/
if(pubkeylen == pem_len && !memcmp(pubkey, pem_ptr, pubkeylen))
result = CURLE_OK;
} while(0);
Curl_safefree(buf);
Curl_safefree(pem_ptr);
fclose(fp);
return result;
}
#ifndef CURL_DISABLE_CRYPTO_AUTH
CURLcode Curl_ssl_md5sum(unsigned char *tmp, /* input */
size_t tmplen,
unsigned char *md5sum, /* output */
size_t md5len)
{
#ifdef curlssl_md5sum
curlssl_md5sum(tmp, tmplen, md5sum, md5len);
#else
MD5_context *MD5pw;
(void) md5len;
MD5pw = Curl_MD5_init(Curl_DIGEST_MD5);
if(!MD5pw)
return CURLE_OUT_OF_MEMORY;
Curl_MD5_update(MD5pw, tmp, curlx_uztoui(tmplen));
Curl_MD5_final(MD5pw, md5sum);
#endif
return CURLE_OK;
}
#endif
/*
* Check whether the SSL backend supports the status_request extension.
*/
bool Curl_ssl_cert_status_request(void)
{
#ifdef curlssl_cert_status_request
return curlssl_cert_status_request();
#else
return FALSE;
#endif
}
/*
* Check whether the SSL backend supports false start.
*/
bool Curl_ssl_false_start(void)
{
#ifdef curlssl_false_start
return curlssl_false_start();
#else
return FALSE;
#endif
}
#endif /* USE_SSL */
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