nimble: Copied ble_sm_alg.c from v5.2-rc1

nimble/host/src/ble_sm_alg.c

@@ -23,6 +23,7 @@
 #include "syscfg/syscfg.h"
 #include "nimble/nimble_opt.h"
 
+#if NIMBLE_BLE_CONNECT
 #if NIMBLE_BLE_SM
 
 #include "nimble/ble.h"
@@ -726,7 +727,10 @@ ble_sm_alg_gen_key_pair(uint8_t *pub, uint8_t *priv)
     return 0;
 }
 
-#if !(MYNEWT_VAL(BLE_CRYPTO_STACK_MBEDTLS))
+#if MYNEWT_VAL(SELFTEST)
+/* Unit tests rely on custom RNG function not being set */
+#define ble_sm_alg_rand NULL
+#elif !(MYNEWT_VAL(BLE_CRYPTO_STACK_MBEDTLS))
 /* used by uECC to get random data */
 static int
 ble_sm_alg_rand(uint8_t *dst, unsigned int size)
@@ -765,3 +769,4 @@ ble_sm_alg_ecc_init(void)
 
 #endif
 #endif
+#endif