make "copy" return a value

diff --git a/d0_blind_id.c b/d0_blind_id.c
index 3ab8b382c12c8ead44852804602863b4fd98bdb7..b4f912e41ad9d92ec0ee5bae743b7c9c8e53eb02 100644 (file)
--- a/d0_blind_id.c
+++ b/d0_blind_id.c
@@ -273,23 +273,27 @@ void d0_blind_id_clear(d0_blind_id_t *ctx)
        memset(ctx, 0, sizeof(*ctx));
 }
 
-void d0_blind_id_copy(d0_blind_id_t *ctx, const d0_blind_id_t *src)
+WARN_UNUSED_RESULT BOOL d0_blind_id_copy(d0_blind_id_t *ctx, const d0_blind_id_t *src)
 {
        d0_blind_id_clear(ctx);
-       if(src->rsa_n) ctx->rsa_n = d0_bignum_mov(NULL, src->rsa_n);
-       if(src->rsa_e) ctx->rsa_e = d0_bignum_mov(NULL, src->rsa_e);
-       if(src->rsa_d) ctx->rsa_d = d0_bignum_mov(NULL, src->rsa_d);
-       if(src->schnorr_G) ctx->schnorr_G = d0_bignum_mov(NULL, src->schnorr_G);
-       if(src->schnorr_s) ctx->schnorr_s = d0_bignum_mov(NULL, src->schnorr_s);
-       if(src->schnorr_4_to_s) ctx->schnorr_4_to_s = d0_bignum_mov(NULL, ctx->schnorr_G);
-       if(src->schnorr_4_to_s_signature) ctx->schnorr_4_to_s_signature = d0_bignum_mov(NULL, src->schnorr_4_to_s_signature);
-       if(src->rsa_blind_signature_camouflage) ctx->rsa_blind_signature_camouflage = d0_bignum_mov(NULL, src->rsa_blind_signature_camouflage);
-       if(src->r) ctx->r = d0_bignum_mov(NULL, src->r);
-       if(src->challenge) ctx->challenge = d0_bignum_mov(NULL, src->challenge);
-       if(src->other_4_to_r) ctx->other_4_to_r = d0_bignum_mov(NULL, src->other_4_to_r);
+       if(src->rsa_n) CHECK_ASSIGN(ctx->rsa_n, d0_bignum_mov(NULL, src->rsa_n));
+       if(src->rsa_e) CHECK_ASSIGN(ctx->rsa_e, d0_bignum_mov(NULL, src->rsa_e));
+       if(src->rsa_d) CHECK_ASSIGN(ctx->rsa_d, d0_bignum_mov(NULL, src->rsa_d));
+       if(src->schnorr_G) CHECK_ASSIGN(ctx->schnorr_G, d0_bignum_mov(NULL, src->schnorr_G));
+       if(src->schnorr_s) CHECK_ASSIGN(ctx->schnorr_s, d0_bignum_mov(NULL, src->schnorr_s));
+       if(src->schnorr_4_to_s) CHECK_ASSIGN(ctx->schnorr_4_to_s, d0_bignum_mov(NULL, ctx->schnorr_G));
+       if(src->schnorr_4_to_s_signature) CHECK_ASSIGN(ctx->schnorr_4_to_s_signature, d0_bignum_mov(NULL, src->schnorr_4_to_s_signature));
+       if(src->rsa_blind_signature_camouflage) CHECK_ASSIGN(ctx->rsa_blind_signature_camouflage, d0_bignum_mov(NULL, src->rsa_blind_signature_camouflage));
+       if(src->r) CHECK_ASSIGN(ctx->r, d0_bignum_mov(NULL, src->r));
+       if(src->challenge) CHECK_ASSIGN(ctx->challenge, d0_bignum_mov(NULL, src->challenge));
+       if(src->other_4_to_r) CHECK_ASSIGN(ctx->other_4_to_r, d0_bignum_mov(NULL, src->other_4_to_r));
        memcpy(ctx->msg, src->msg, sizeof(ctx->msg));
        ctx->msglen = src->msglen;
        memcpy(ctx->msghash, src->msghash, sizeof(ctx->msghash));
+       return 0;
+fail:
+       d0_blind_id_clear(ctx);
+       return 1;
 }
 
 WARN_UNUSED_RESULT BOOL d0_blind_id_generate_private_key_fastreject(d0_blind_id_t *ctx, int k, d0_fastreject_function reject, void *pass)

diff --git a/d0_blind_id.h b/d0_blind_id.h
index 940cd54d0bfb245c39e8d948faaa168074c403bc..d381898933059e1152e55321037d5cc4f775a5a0 100644 (file)
--- a/d0_blind_id.h
+++ b/d0_blind_id.h
@@ -9,7 +9,7 @@ typedef BOOL (*d0_fastreject_function) (const d0_blind_id_t *ctx, void *pass);
 EXPORT WARN_UNUSED_RESULT d0_blind_id_t *d0_blind_id_new(void);
 EXPORT void d0_blind_id_free(d0_blind_id_t *a);
 EXPORT void d0_blind_id_clear(d0_blind_id_t *ctx);
-EXPORT void d0_blind_id_copy(d0_blind_id_t *ctx, const d0_blind_id_t *src);
+EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_copy(d0_blind_id_t *ctx, const d0_blind_id_t *src);
 EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_generate_private_key(d0_blind_id_t *ctx, int k);
 EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_generate_private_key_fastreject(d0_blind_id_t *ctx, int k, d0_fastreject_function reject, void *pass);
 EXPORT WARN_UNUSED_RESULT BOOL d0_blind_id_read_private_key(d0_blind_id_t *ctx, const char *inbuf, size_t inbuflen);