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Select cipher suites (2.) #148

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merged 3 commits into from
Apr 17, 2023
Merged

Select cipher suites (2.) #148

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fb19c3a
dtls.c: add callback for peer specific selection of parameters as cipher
boaks Dec 8, 2021
2f6ed3c
Fix some typos and return values.
boaks Mar 1, 2023
4a86dc7
Add cipher suite selection to test applications.
boaks Nov 28, 2022
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15 changes: 15 additions & 0 deletions crypto.h
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,8 @@ typedef uint8_t dtls_cipher_index_t;
/** Index in cipher parameter table for NULL cipher */
#define DTLS_CIPHER_INDEX_NULL 0

/** Maximum number of cipher suites */
#define DTLS_MAX_CIPHER_SUITES 4

typedef enum { AES128=0
} dtls_crypto_alg;
Expand Down Expand Up @@ -128,6 +130,18 @@ typedef struct {

struct netq_t;

/**
* Set of user parameters used by the handshake.
*/
typedef struct dtls_user_parameters_t {
/**
* The list of cipher suites.
* The list must be terminated by TLS_NULL_WITH_NULL_NULL.
*/
dtls_cipher_t cipher_suites[DTLS_MAX_CIPHER_SUITES + 1];
unsigned int force_extended_master_secret:1; /** force extended master secret extension (RFC7627) */
} dtls_user_parameters_t;

typedef struct {
union {
struct random_t {
Expand All @@ -141,6 +155,7 @@ typedef struct {
dtls_hs_state_t hs_state; /**< handshake protocol status */

dtls_compression_t compression; /**< compression method */
dtls_user_parameters_t user_parameters; /**< user parameters */
dtls_cipher_index_t cipher_index; /**< internal index for cipher_suite_params, DTLS_CIPHER_INDEX_NULL for TLS_NULL_WITH_NULL_NULL */
unsigned int do_client_auth:1;
unsigned int extended_master_secret:1;
Expand Down
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