Adds api call to convert public key to an (string) id

2 files changed, 21 insertions, 0 deletions

diff --git a/libcmix/cmix.c b/libcmix/cmix.c
index 9db4dbb..f6eb2e8 100644
--- a/libcmix/cmix.c
+++ b/libcmix/cmix.c
@@ -3,6 +3,7 @@
 
 #include <string.h>
 #include <stdlib.h>
+#include <stdio.h>
 
 enum cmix_error permutation(struct CMixBuffer b) {
 	return no_error;
@@ -336,3 +337,21 @@ enum cmix_error remove_r_and_s(struct CMixContext const* ctx, char* out_buffer,
 	ctx->api.free_group_element(inv_pirs);
 	ctx->api.free_group_element(mult);
 }
+
+enum cmix_error get_pub_key_hash(struct CMixContext const* ctx, char** buffer)
+{
+	char* buffer2;
+	size_t len;
+	ctx->api.get_pub_key_hash(&buffer2, &len, ctx->keypair.pub);
+	
+	size_t hex_len = len*2+1;
+	*buffer = (char*) calloc(hex_len, sizeof(char));
+	
+	for(size_t i = 0; i < len; i++) {
+		sprintf(&(*buffer)[i*2],"%hhX",buffer2[i]);
+	}
+	
+	ctx->api.free_buffer(buffer2);
+	
+	return no_error;
+}
diff --git a/libcmix/cmix.h b/libcmix/cmix.h
index ba0b826..89a6ad3 100644
--- a/libcmix/cmix.h
+++ b/libcmix/cmix.h
@@ -94,6 +94,8 @@ enum cmix_error get_public_key(struct CMixContext const* ctx, char* buffer);
 
 enum cmix_error add_public_share(struct CMixContext const* ctx, char* buffer, char const* share);
 
+enum cmix_error get_pub_key_hash(struct CMixContext const* ctx, char** buffer);
+
 enum cmix_error start_mix(struct CMixContext* ctx, size_t nr_participants);
 
 enum cmix_error initialize_mix_randomness(struct CMixContext* ctx);