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Add ECDH (Elliptic Curve Diffie-Hellman cryptography) to example

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See https://wiki.openssl.org/index.php/Elliptic_Curve_Cryptography
See also https://github.com/civetweb/civetweb/issues/347
This commit is contained in:
bel2125
2016-09-25 22:32:50 +02:00
parent 3b6461d2a0
commit fbdee7440b
2 changed files with 99 additions and 21 deletions
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5
examples/embedded_c/Makefile
View File

@@ -24,13 +24,14 @@ endif
all: $(PROG)
$(PROG): $(CIVETWEB_LIB) $(SRC)
$(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(SRC) $(CIVETWEB_LIB) $(LIBS)
$(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(SRC) $(CIVETWEB_LIB) $(LIBS) -lcrypto -lssl -DUSE_SSL_DH=1
$(CIVETWEB_LIB):
$(MAKE) -C $(TOP) WITH_IPV6=1 WITH_WEBSOCKET=1 clean lib
$(MAKE) -C $(TOP) WITH_IPV6=1 WITH_WEBSOCKET=1 COPT='-DNO_SSL_DL=1' clean lib
cp $(TOP)/$(CIVETWEB_LIB) .
clean:
rm -f $(CIVETWEB_LIB) $(PROG)
.PHONY: all clean

85
examples/embedded_c/embedded_c.c
View File

@@ -444,7 +444,7 @@ CookieHandler(struct mg_connection *conn, void *cbdata)
mg_printf(conn, "Content-Type: text/html\r\n\r\n");
mg_printf(conn, "<html><body>");
mg_printf(conn, "<h2>This is the CookieHandler.</h2>", cbdata);
mg_printf(conn, "<h2>This is the CookieHandler.</h2>");
mg_printf(conn, "<p>The actual uri is %s</p>", req_info->uri);
if (first_str[0] == 0) {
@@ -634,12 +634,85 @@ InformWebsockets(struct mg_context *ctx)
#endif
#ifdef USE_SSL_DH
#include "openssl/ssl.h"
#include "openssl/dh.h"
#include "openssl/ec.h"
#include "openssl/evp.h"
#include "openssl/ecdsa.h"
DH *
get_dh2236()
{
static unsigned char dh2236_p[] = {
0x0E, 0x97, 0x6E, 0x6A, 0x88, 0x84, 0xD2, 0xD7, 0x55, 0x6A, 0x17, 0xB7,
0x81, 0x9A, 0x98, 0xBC, 0x7E, 0xD1, 0x6A, 0x44, 0xB1, 0x18, 0xE6, 0x25,
0x3A, 0x62, 0x35, 0xF0, 0x41, 0x91, 0xE2, 0x16, 0x43, 0x9D, 0x8F, 0x7D,
0x5D, 0xDA, 0x85, 0x47, 0x25, 0xC4, 0xBA, 0x68, 0x0A, 0x87, 0xDC, 0x2C,
0x33, 0xF9, 0x75, 0x65, 0x17, 0xCB, 0x8B, 0x80, 0xFE, 0xE0, 0xA8, 0xAF,
0xC7, 0x9E, 0x82, 0xBE, 0x6F, 0x1F, 0x00, 0x04, 0xBD, 0x69, 0x50, 0x8D,
0x9C, 0x3C, 0x41, 0x69, 0x21, 0x4E, 0x86, 0xC8, 0x2B, 0xCC, 0x07, 0x4D,
0xCF, 0xE4, 0xA2, 0x90, 0x8F, 0x66, 0xA9, 0xEF, 0xF7, 0xFC, 0x6F, 0x5F,
0x06, 0x22, 0x00, 0xCB, 0xCB, 0xC3, 0x98, 0x3F, 0x06, 0xB9, 0xEC, 0x48,
0x3B, 0x70, 0x6E, 0x94, 0xE9, 0x16, 0xE1, 0xB7, 0x63, 0x2E, 0xAB, 0xB2,
0xF3, 0x84, 0xB5, 0x3D, 0xD7, 0x74, 0xF1, 0x6A, 0xD1, 0xEF, 0xE8, 0x04,
0x18, 0x76, 0xD2, 0xD6, 0xB0, 0xB7, 0x71, 0xB6, 0x12, 0x8F, 0xD1, 0x33,
0xAB, 0x49, 0xAB, 0x09, 0x97, 0x35, 0x9D, 0x4B, 0xBB, 0x54, 0x22, 0x6E,
0x1A, 0x33, 0x18, 0x02, 0x8A, 0xF4, 0x7C, 0x0A, 0xCE, 0x89, 0x75, 0x2D,
0x10, 0x68, 0x25, 0xA9, 0x6E, 0xCD, 0x97, 0x49, 0xED, 0xAE, 0xE6, 0xA7,
0xB0, 0x07, 0x26, 0x25, 0x60, 0x15, 0x2B, 0x65, 0x88, 0x17, 0xF2, 0x5D,
0x2C, 0xF6, 0x2A, 0x7A, 0x8C, 0xAD, 0xB6, 0x0A, 0xA2, 0x57, 0xB0, 0xC1,
0x0E, 0x5C, 0xA8, 0xA1, 0x96, 0x58, 0x9A, 0x2B, 0xD4, 0xC0, 0x8A, 0xCF,
0x91, 0x25, 0x94, 0xB4, 0x14, 0xA7, 0xE4, 0xE2, 0x1B, 0x64, 0x5F, 0xD2,
0xCA, 0x70, 0x46, 0xD0, 0x2C, 0x95, 0x6B, 0x9A, 0xFB, 0x83, 0xF9, 0x76,
0xE6, 0xD4, 0xA4, 0xA1, 0x2B, 0x2F, 0xF5, 0x1D, 0xE4, 0x06, 0xAF, 0x7D,
0x22, 0xF3, 0x04, 0x30, 0x2E, 0x4C, 0x64, 0x12, 0x5B, 0xB0, 0x55, 0x3E,
0xC0, 0x5E, 0x56, 0xCB, 0x99, 0xBC, 0xA8, 0xD9, 0x23, 0xF5, 0x57, 0x40,
0xF0, 0x52, 0x85, 0x9B,
};
static unsigned char dh2236_g[] = {
0x02,
};
DH *dh;
if ((dh = DH_new()) == NULL)
return (NULL);
dh->p = BN_bin2bn(dh2236_p, sizeof(dh2236_p), NULL);
dh->g = BN_bin2bn(dh2236_g, sizeof(dh2236_g), NULL);
if ((dh->p == NULL) || (dh->g == NULL)) {
DH_free(dh);
return (NULL);
}
return (dh);
}
#endif
#ifndef NO_SSL
int
init_ssl(void *ssl_context, void *user_data)
{
/* Add application specific SSL initialization */
struct ssl_ctx_st *ctx = (struct ssl_ctx_st *)ssl_context;
#ifdef USE_SSL_DH
/* example from https://github.com/civetweb/civetweb/issues/347 */
DH *dh = get_dh2236();
if (!dh)
return -1;
if (1 != SSL_CTX_set_tmp_dh(ctx, dh))
return -1;
DH_free(dh);
EC_KEY *ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
if (!ecdh)
return -1;
if (1 != SSL_CTX_set_tmp_ecdh(ctx, ecdh))
return -1;
EC_KEY_free(ecdh);
printf("ECDH ciphers initialized\n");
#endif
return 0;
}
#endif
@@ -648,7 +721,8 @@ init_ssl(void *ssl_context, void *user_data)
int
main(int argc, char *argv[])
{
const char *options[] = {"document_root",
const char *options[] = {
"document_root",
DOCUMENT_ROOT,
"listening_ports",
PORT,
@@ -666,7 +740,11 @@ main(int argc, char *argv[])
"ssl_protocol_version",
"3",
"ssl_cipher_list",
"DES-CBC3-SHA:AES128-SHA:AES128-GCM-SHA256"
#ifdef USE_SSL_DH
"ECDHE-RSA-AES256-GCM-SHA384:DES-CBC3-SHA:AES128-SHA:AES128-GCM-SHA256",
#else
"DES-CBC3-SHA:AES128-SHA:AES128-GCM-SHA256",
#endif
#endif
0};
struct mg_callbacks callbacks;
@@ -827,4 +905,3 @@ main(int argc, char *argv[])
return EXIT_SUCCESS;
}