aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--lib/Makefile.inc4
-rw-r--r--lib/Makefile.vc61
-rw-r--r--lib/formdata.c9
-rw-r--r--lib/rand.c129
-rw-r--r--lib/rand.h42
-rw-r--r--lib/vauth/digest.c15
-rw-r--r--lib/vauth/ntlm.c12
-rw-r--r--lib/vtls/gskit.h4
-rw-r--r--lib/vtls/vtls.c84
-rw-r--r--lib/vtls/vtls.h9
10 files changed, 211 insertions, 98 deletions
diff --git a/lib/Makefile.inc b/lib/Makefile.inc
index 1328cadb0..19f58000a 100644
--- a/lib/Makefile.inc
+++ b/lib/Makefile.inc
@@ -51,7 +51,7 @@ LIB_CFILES = file.c timeval.c base64.c hostip.c progress.c formdata.c \
pingpong.c rtsp.c curl_threads.c warnless.c hmac.c curl_rtmp.c \
openldap.c curl_gethostname.c gopher.c idn_win32.c \
http_proxy.c non-ascii.c asyn-ares.c asyn-thread.c curl_gssapi.c \
- http_ntlm.c curl_ntlm_wb.c curl_ntlm_core.c curl_sasl.c \
+ http_ntlm.c curl_ntlm_wb.c curl_ntlm_core.c curl_sasl.c rand.c \
curl_multibyte.c hostcheck.c conncache.c pipeline.c dotdot.c \
x509asn1.c http2.c smb.c curl_endian.c curl_des.c system_win32.c
@@ -72,7 +72,7 @@ LIB_HFILES = arpa_telnet.h netrc.h file.h timeval.h hostip.h progress.h \
curl_sasl.h curl_multibyte.h hostcheck.h conncache.h \
curl_setup_once.h multihandle.h setup-vms.h pipeline.h dotdot.h \
x509asn1.h http2.h sigpipe.h smb.h curl_endian.h curl_des.h \
- curl_printf.h system_win32.h
+ curl_printf.h system_win32.h rand.h
LIB_RCFILES = libcurl.rc
diff --git a/lib/Makefile.vc6 b/lib/Makefile.vc6
index 697993915..d028428a6 100644
--- a/lib/Makefile.vc6
+++ b/lib/Makefile.vc6
@@ -602,6 +602,7 @@ X_OBJS= \
$(DIROBJ)\pop3.obj \
$(DIROBJ)\progress.obj \
$(DIROBJ)\strcase.obj \
+ $(DIROBJ)\rand.obj \
$(DIROBJ)\rtsp.obj \
$(DIROBJ)\schannel.obj \
$(DIROBJ)\security.obj \
diff --git a/lib/formdata.c b/lib/formdata.c
index 785f1a678..1001bc191 100644
--- a/lib/formdata.c
+++ b/lib/formdata.c
@@ -36,6 +36,7 @@
#include "strcase.h"
#include "sendf.h"
#include "strdup.h"
+#include "rand.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
@@ -1569,8 +1570,12 @@ static char *formboundary(struct Curl_easy *data)
{
/* 24 dashes and 16 hexadecimal digits makes 64 bit (18446744073709551615)
combinations */
- return aprintf("------------------------%08x%08x",
- Curl_rand(data), Curl_rand(data));
+ unsigned int rnd[2];
+ CURLcode result = Curl_rand(data, &rnd[0], 2);
+ if(result)
+ return NULL;
+
+ return aprintf("------------------------%08x%08x", rnd[0], rnd[1]);
}
#else /* CURL_DISABLE_HTTP */
diff --git a/lib/rand.c b/lib/rand.c
new file mode 100644
index 000000000..107a1dd4a
--- /dev/null
+++ b/lib/rand.c
@@ -0,0 +1,129 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2016, 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.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#include <fcntl.h>
+
+#include <curl/curl.h>
+#include "vtls/vtls.h"
+#include "sendf.h"
+#include "rand.h"
+
+/* The last 3 #include files should be in this order */
+#include "curl_printf.h"
+#include "curl_memory.h"
+#include "memdebug.h"
+
+static CURLcode randit(struct Curl_easy *data, unsigned int *rnd)
+{
+ unsigned int r;
+ CURLcode result = CURLE_OK;
+ static unsigned int randseed;
+ static bool seeded = FALSE;
+
+#ifdef CURLDEBUG
+ char *force_entropy = getenv("CURL_ENTROPY");
+ if(force_entropy) {
+ if(!seeded) {
+ size_t elen = strlen(force_entropy);
+ size_t clen = sizeof(randseed);
+ size_t min = elen < clen ? elen : clen;
+ memcpy((char *)&randseed, force_entropy, min);
+ seeded = TRUE;
+ }
+ else
+ randseed++;
+ *rnd = randseed;
+ return CURLE_OK;
+ }
+#endif
+
+ /* data may be NULL! */
+ result = Curl_ssl_random(data, (unsigned char *)&rnd, sizeof(rnd));
+ if(result != CURLE_NOT_BUILT_IN)
+ /* only if there is no random funtion in the TLS backend do the non crypto
+ version, otherwise return result */
+ return result;
+
+ /* ---- non-cryptographic version following ---- */
+
+#ifdef RANDOM_FILE
+ if(!seeded) {
+ /* if there's a random file to read a seed from, use it */
+ int fd = open(RANDOM_FILE, O_RDONLY);
+ if(fd > -1) {
+ /* read random data into the randseed variable */
+ ssize_t nread = read(fd, &randseed, sizeof(randseed));
+ if(nread == sizeof(randseed))
+ seeded = TRUE;
+ close(fd);
+ }
+ }
+#endif
+
+ if(!seeded) {
+ struct timeval now = curlx_tvnow();
+ infof(data, "WARNING: Using weak random seed\n");
+ randseed += (unsigned int)now.tv_usec + (unsigned int)now.tv_sec;
+ randseed = randseed * 1103515245 + 12345;
+ randseed = randseed * 1103515245 + 12345;
+ randseed = randseed * 1103515245 + 12345;
+ seeded = TRUE;
+ }
+
+ /* Return an unsigned 32-bit pseudo-random number. */
+ r = randseed = randseed * 1103515245 + 12345;
+ *rnd = (r << 16) | ((r >> 16) & 0xFFFF);
+ return CURLE_OK;
+}
+
+/*
+ * Curl_rand() stores 'num' number of random unsigned integers in the buffer
+ * 'rndptr' points to.
+ *
+ * If libcurl is built without TLS support or with a TLS backend that lacks a
+ * proper random API (Gskit, PolarSSL or mbedTLS), this function will use
+ * "weak" random.
+ *
+ * When built *with* TLS support and a backend that offers strong random, it
+ * will return error if it cannot provide strong random values.
+ *
+ * NOTE: 'data' may be passed in as NULL when coming from external API without
+ * easy handle!
+ *
+ */
+
+CURLcode Curl_rand(struct Curl_easy *data, unsigned int *rndptr, int num)
+{
+ CURLcode result;
+ int i;
+
+ assert(num > 0);
+
+ for(i = 0; i < num; i++) {
+ result = randit(data, rndptr++);
+ if(result)
+ return result;
+ }
+ return result;
+}
diff --git a/lib/rand.h b/lib/rand.h
new file mode 100644
index 000000000..36f89b526
--- /dev/null
+++ b/lib/rand.h
@@ -0,0 +1,42 @@
+#ifndef HEADER_CURL_RAND_H
+#define HEADER_CURL_RAND_H
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2016, 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.
+ *
+ ***************************************************************************/
+
+/*
+ * Curl_rand() stores 'num' number of random unsigned integers in the buffer
+ * 'rnd' points to.
+ *
+ * If libcurl is built without TLS support or with a TLS backend that lacks a
+ * proper random API (Gskit, PolarSSL or mbedTLS), this function will use
+ * "weak" random.
+ *
+ * When built *with* TLS support and a backend that offers strong random, it
+ * will return error if it cannot provide strong random values.
+ *
+ * NOTE: 'data' may be passed in as NULL when coming from external API without
+ * easy handle!
+ *
+ */
+CURLcode Curl_rand(struct Curl_easy *data, unsigned int *rnd, int num);
+
+#endif /* HEADER_CURL_RAND_H */
diff --git a/lib/vauth/digest.c b/lib/vauth/digest.c
index 0a11a308d..ca1d0c24a 100644
--- a/lib/vauth/digest.c
+++ b/lib/vauth/digest.c
@@ -40,6 +40,7 @@
#include "strcase.h"
#include "non-ascii.h" /* included for Curl_convert_... prototypes */
#include "curl_printf.h"
+#include "rand.h"
/* The last #include files should be: */
#include "curl_memory.h"
@@ -387,10 +388,9 @@ CURLcode Curl_auth_create_digest_md5_message(struct Curl_easy *data,
return CURLE_BAD_CONTENT_ENCODING;
/* Generate 16 bytes of random data */
- entropy[0] = Curl_rand(data);
- entropy[1] = Curl_rand(data);
- entropy[2] = Curl_rand(data);
- entropy[3] = Curl_rand(data);
+ result = Curl_rand(data, &entropy[0], 4);
+ if(result)
+ return result;
/* Convert the random data into a 32 byte hex string */
snprintf(cnonce, sizeof(cnonce), "%08x%08x%08x%08x",
@@ -684,9 +684,12 @@ CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data,
digest->nc = 1;
if(!digest->cnonce) {
+ unsigned int rnd[4];
+ result = Curl_rand(data, &rnd[0], 4);
+ if(result)
+ return result;
snprintf(cnoncebuf, sizeof(cnoncebuf), "%08x%08x%08x%08x",
- Curl_rand(data), Curl_rand(data),
- Curl_rand(data), Curl_rand(data));
+ rnd[0], rnd[1], rnd[2], rnd[3]);
result = Curl_base64_encode(data, cnoncebuf, strlen(cnoncebuf),
&cnonce, &cnonce_sz);
diff --git a/lib/vauth/ntlm.c b/lib/vauth/ntlm.c
index b484a011a..b4d345d63 100644
--- a/lib/vauth/ntlm.c
+++ b/lib/vauth/ntlm.c
@@ -41,7 +41,7 @@
#include "curl_gethostname.h"
#include "curl_multibyte.h"
#include "warnless.h"
-
+#include "rand.h"
#include "vtls/vtls.h"
#ifdef USE_NSS
@@ -558,8 +558,9 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
unsigned int entropy[2];
unsigned char ntlmv2hash[0x18];
- entropy[0] = Curl_rand(data);
- entropy[1] = Curl_rand(data);
+ result = Curl_rand(data, &entropy[0], 2);
+ if(result)
+ return result;
result = Curl_ntlm_core_mk_nt_hash(data, passwdp, ntbuffer);
if(result)
@@ -598,8 +599,9 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
unsigned int entropy[2];
/* Need to create 8 bytes random data */
- entropy[0] = Curl_rand(data);
- entropy[1] = Curl_rand(data);
+ result = Curl_rand(data, &entropy[0], 2);
+ if(result)
+ return result;
/* 8 bytes random data as challenge in lmresp */
memcpy(lmresp, entropy, 8);
diff --git a/lib/vtls/gskit.h b/lib/vtls/gskit.h
index 41483cba6..e258a29f1 100644
--- a/lib/vtls/gskit.h
+++ b/lib/vtls/gskit.h
@@ -7,7 +7,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2016, 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
@@ -64,7 +64,7 @@ int Curl_gskit_check_cxn(struct connectdata *cxn);
#define curlssl_version Curl_gskit_version
#define curlssl_check_cxn(x) Curl_gskit_check_cxn(x)
#define curlssl_data_pending(x,y) 0
-#define curlssl_random(x,y,z) -1
+#define curlssl_random(x,y,z) (x=x, y=y, z=z, CURLE_NOT_BUILT_IN)
#endif /* USE_GSKIT */
diff --git a/lib/vtls/vtls.c b/lib/vtls/vtls.c
index 56a882341..ed65b46b9 100644
--- a/lib/vtls/vtls.c
+++ b/lib/vtls/vtls.c
@@ -177,77 +177,6 @@ void Curl_free_ssl_config(struct ssl_config_data* sslc)
Curl_safefree(sslc->clientcert);
}
-
-/*
- * Curl_rand() returns a random unsigned integer, 32bit.
- *
- * This non-SSL function is put here only because this file is the only one
- * with knowledge of what the underlying SSL libraries provide in terms of
- * randomizers.
- *
- * NOTE: 'data' may be passed in as NULL when coming from external API without
- * easy handle!
- *
- */
-
-unsigned int Curl_rand(struct Curl_easy *data)
-{
- unsigned int r = 0;
- static unsigned int randseed;
- static bool seeded = FALSE;
-
-#ifdef CURLDEBUG
- char *force_entropy = getenv("CURL_ENTROPY");
- if(force_entropy) {
- if(!seeded) {
- size_t elen = strlen(force_entropy);
- size_t clen = sizeof(randseed);
- size_t min = elen < clen ? elen : clen;
- memcpy((char *)&randseed, force_entropy, min);
- seeded = TRUE;
- }
- else
- randseed++;
- return randseed;
- }
-#endif
-
- /* data may be NULL! */
- if(!Curl_ssl_random(data, (unsigned char *)&r, sizeof(r)))
- return r;
-
- /* If Curl_ssl_random() returns non-zero it couldn't offer randomness and we
- instead perform a "best effort" */
-
-#ifdef RANDOM_FILE
- if(!seeded) {
- /* if there's a random file to read a seed from, use it */
- int fd = open(RANDOM_FILE, O_RDONLY);
- if(fd > -1) {
- /* read random data into the randseed variable */
- ssize_t nread = read(fd, &randseed, sizeof(randseed));
- if(nread == sizeof(randseed))
- seeded = TRUE;
- close(fd);
- }
- }
-#endif
-
- if(!seeded) {
- struct timeval now = curlx_tvnow();
- infof(data, "WARNING: Using weak random seed\n");
- randseed += (unsigned int)now.tv_usec + (unsigned int)now.tv_sec;
- randseed = randseed * 1103515245 + 12345;
- randseed = randseed * 1103515245 + 12345;
- randseed = randseed * 1103515245 + 12345;
- seeded = TRUE;
- }
-
- /* Return an unsigned 32-bit pseudo-random number. */
- r = randseed = randseed * 1103515245 + 12345;
- return (r << 16) | ((r >> 16) & 0xFFFF);
-}
-
int Curl_ssl_backend(void)
{
return (int)CURL_SSL_BACKEND;
@@ -736,11 +665,16 @@ CURLcode Curl_ssl_push_certinfo(struct Curl_easy *data,
return Curl_ssl_push_certinfo_len(data, certnum, label, value, valuelen);
}
-int Curl_ssl_random(struct Curl_easy *data,
- unsigned char *entropy,
- size_t length)
+CURLcode Curl_ssl_random(struct Curl_easy *data,
+ unsigned char *entropy,
+ size_t length)
{
- return curlssl_random(data, entropy, length);
+ int rc = curlssl_random(data, entropy, length);
+ if(rc) {
+ failf(data, "PRNG seeding failed");
+ return CURLE_FAILED_INIT; /* possibly weird return code */
+ }
+ return CURLE_OK;
}
/*
diff --git a/lib/vtls/vtls.h b/lib/vtls/vtls.h
index a41ecc325..69d206f52 100644
--- a/lib/vtls/vtls.h
+++ b/lib/vtls/vtls.h
@@ -56,8 +56,6 @@ bool Curl_clone_ssl_config(struct ssl_config_data* source,
struct ssl_config_data* dest);
void Curl_free_ssl_config(struct ssl_config_data* sslc);
-unsigned int Curl_rand(struct Curl_easy *);
-
int Curl_ssl_backend(void);
#ifdef USE_SSL
@@ -140,10 +138,9 @@ void Curl_ssl_kill_session(struct curl_ssl_session *session);
*/
void Curl_ssl_delsessionid(struct connectdata *conn, void *ssl_sessionid);
-/* get N random bytes into the buffer, return 0 if a find random is filled
- in */
-int Curl_ssl_random(struct Curl_easy *data, unsigned char *buffer,
- size_t length);
+/* get N random bytes into the buffer */
+CURLcode Curl_ssl_random(struct Curl_easy *data, unsigned char *buffer,
+ size_t length);
CURLcode Curl_ssl_md5sum(unsigned char *tmp, /* input */
size_t tmplen,
unsigned char *md5sum, /* output */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 07:42:17 +0000