Add functions to get the private/public key size for a curve (#73)
diff --git a/uECC.c b/uECC.c
index 63ec6f9..7717533 100644
--- a/uECC.c
+++ b/uECC.c
@@ -195,6 +195,14 @@
return g_rng_function;
}
+int uECC_curve_private_key_size(uECC_Curve curve) {
+ return BITS_TO_BYTES(curve->num_n_bits);
+}
+
+int uECC_curve_public_key_size(uECC_Curve curve) {
+ return 2 * curve->num_bytes;
+}
+
#if !asm_clear
uECC_VLI_API void uECC_vli_clear(uECC_word_t *vli, wordcount_t num_words) {
wordcount_t i;
diff --git a/uECC.h b/uECC.h
index dcc8e82..1193ce8 100644
--- a/uECC.h
+++ b/uECC.h
@@ -130,6 +130,18 @@
*/
uECC_RNG_Function uECC_get_rng(void);
+/* uECC_curve_private_key_size() function.
+
+Returns the size of a private key for the curve in bytes.
+*/
+int uECC_curve_private_key_size(uECC_Curve curve);
+
+/* uECC_curve_public_key_size() function.
+
+Returns the size of a public key for the curve in bytes.
+*/
+int uECC_curve_public_key_size(uECC_Curve curve);
+
/* uECC_make_key() function.
Create a public/private key pair.
