Add FFDH definitions and translation functions
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
diff --git a/include/mbedtls/dhm.h b/include/mbedtls/dhm.h
index 6ffe681..b7c3256 100644
--- a/include/mbedtls/dhm.h
+++ b/include/mbedtls/dhm.h
@@ -66,6 +66,7 @@
#include "mbedtls/build_info.h"
#include "mbedtls/bignum.h"
+#include <string.h>
/*
* DHM Error codes
@@ -91,6 +92,20 @@
/** Setting the modulus and generator failed. */
#define MBEDTLS_ERR_DHM_SET_GROUP_FAILED -0x3580
+/* Finite Field Groups (DHE) */
+#define MBEDTLS_DHM_GROUP_FFDHE2048 0x0100
+#define MBEDTLS_DHM_GROUP_FFDHE3072 0x0101
+#define MBEDTLS_DHM_GROUP_FFDHE4096 0x0102
+#define MBEDTLS_DHM_GROUP_FFDHE6144 0x0103
+#define MBEDTLS_DHM_GROUP_FFDHE8192 0x0104
+
+/* Finite Field Group Names (DHE) */
+#define MBEDTLS_DHM_GROUP_NAME_FFDHE2048 "ffdhe2048"
+#define MBEDTLS_DHM_GROUP_NAME_FFDHE3072 "ffdhe3072"
+#define MBEDTLS_DHM_GROUP_NAME_FFDHE4096 "ffdhe4096"
+#define MBEDTLS_DHM_GROUP_NAME_FFDHE6144 "ffdhe6144"
+#define MBEDTLS_DHM_GROUP_NAME_FFDHE8192 "ffdhe8192"
+
/** Which parameter to access in mbedtls_dhm_get_value(). */
typedef enum {
MBEDTLS_DHM_PARAM_P, /*!< The prime modulus. */
@@ -377,6 +392,55 @@
#endif /* MBEDTLS_FS_IO */
#endif /* MBEDTLS_ASN1_PARSE_C */
+static inline uint16_t mbedtls_ssl_ffdh_group_from_name(const char *name)
+{
+ if (strcmp(name, MBEDTLS_DHM_GROUP_NAME_FFDHE2048) == 0) {
+ return MBEDTLS_DHM_GROUP_FFDHE2048;
+ } else if (strcmp(name, MBEDTLS_DHM_GROUP_NAME_FFDHE3072) == 0) {
+ return MBEDTLS_DHM_GROUP_FFDHE3072;
+ } else if (strcmp(name, MBEDTLS_DHM_GROUP_NAME_FFDHE4096) == 0) {
+ return MBEDTLS_DHM_GROUP_FFDHE4096;
+ } else if (strcmp(name, MBEDTLS_DHM_GROUP_NAME_FFDHE6144) == 0) {
+ return MBEDTLS_DHM_GROUP_FFDHE6144;
+ } else if (strcmp(name, MBEDTLS_DHM_GROUP_NAME_FFDHE8192) == 0) {
+ return MBEDTLS_DHM_GROUP_FFDHE8192;
+ }
+ return 0;
+}
+
+static inline const char *mbedtls_ssl_ffdh_name_from_group(uint16_t group)
+{
+ switch (group) {
+ case MBEDTLS_DHM_GROUP_FFDHE2048:
+ return MBEDTLS_DHM_GROUP_NAME_FFDHE2048;
+ case MBEDTLS_DHM_GROUP_FFDHE3072:
+ return MBEDTLS_DHM_GROUP_NAME_FFDHE3072;
+ case MBEDTLS_DHM_GROUP_FFDHE4096:
+ return MBEDTLS_DHM_GROUP_NAME_FFDHE4096;
+ case MBEDTLS_DHM_GROUP_FFDHE6144:
+ return MBEDTLS_DHM_GROUP_NAME_FFDHE6144;
+ case MBEDTLS_DHM_GROUP_FFDHE8192:
+ return MBEDTLS_DHM_GROUP_NAME_FFDHE8192;
+ default:
+ return NULL;
+ }
+ return NULL;
+}
+
+static inline uint16_t *mbedtls_ssl_ffdh_supported_groups(void)
+{
+ static uint16_t ffdh_groups[] = {
+ MBEDTLS_DHM_GROUP_FFDHE2048,
+ MBEDTLS_DHM_GROUP_FFDHE3072,
+ MBEDTLS_DHM_GROUP_FFDHE4096,
+ MBEDTLS_DHM_GROUP_FFDHE6144,
+ MBEDTLS_DHM_GROUP_FFDHE8192,
+ 0
+ };
+
+ return ffdh_groups;
+}
+
#if defined(MBEDTLS_SELF_TEST)
/**