frost/secp256k1-zkp
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Check arguments of _preallocated functions

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This commit is contained in:
Tim Ruffing 2018-10-25 18:08:14 +02:00
parent 19debda326
commit 1a1febfd86
1 changed files with 19 additions and 6 deletions
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25
src/secp256k1.c
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@ -94,6 +94,7 @@ size_t secp256k1_context_preallocated_size(unsigned int flags) {
size_t secp256k1_context_preallocated_clone_size(const secp256k1_context* ctx) {
size_t ret = ROUND_TO_ALIGN(sizeof(secp256k1_context));
VERIFY_CHECK(ctx != NULL);
if (secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx)) {
ret += SECP256K1_ECMULT_GEN_CONTEXT_PREALLOCATED_SIZE;
}
@ -105,9 +106,12 @@ size_t secp256k1_context_preallocated_clone_size(const secp256k1_context* ctx) {
secp256k1_context* secp256k1_context_preallocated_create(void* prealloc, unsigned int flags) {
void* const base = prealloc;
size_t prealloc_size = secp256k1_context_preallocated_size(flags);
secp256k1_context* ret = (secp256k1_context*)manual_alloc(&prealloc, sizeof(secp256k1_context), base, prealloc_size);
size_t prealloc_size;
secp256k1_context* ret;
VERIFY_CHECK(prealloc != NULL);
prealloc_size = secp256k1_context_preallocated_size(flags);
ret = (secp256k1_context*)manual_alloc(&prealloc, sizeof(secp256k1_context), base, prealloc_size);
ret->illegal_callback = default_illegal_callback;
ret->error_callback = default_error_callback;
@ -142,8 +146,13 @@ secp256k1_context* secp256k1_context_create(unsigned int flags) {
}
secp256k1_context* secp256k1_context_preallocated_clone(const secp256k1_context* ctx, void* prealloc) {
size_t prealloc_size = secp256k1_context_preallocated_clone_size(ctx);
secp256k1_context* ret = (secp256k1_context*)prealloc;
size_t prealloc_size;
secp256k1_context* ret;
VERIFY_CHECK(ctx != NULL);
ARG_CHECK(prealloc != NULL);
prealloc_size = secp256k1_context_preallocated_clone_size(ctx);
ret = (secp256k1_context*)prealloc;
memcpy(ret, ctx, prealloc_size);
secp256k1_ecmult_gen_context_finalize_memcpy(&ret->ecmult_gen_ctx, &ctx->ecmult_gen_ctx);
secp256k1_ecmult_context_finalize_memcpy(&ret->ecmult_ctx, &ctx->ecmult_ctx);
@ -151,8 +160,12 @@ secp256k1_context* secp256k1_context_preallocated_clone(const secp256k1_context*
}
secp256k1_context* secp256k1_context_clone(const secp256k1_context* ctx) {
size_t prealloc_size = secp256k1_context_preallocated_clone_size(ctx);
secp256k1_context* ret = (secp256k1_context*)checked_malloc(&ctx->error_callback, prealloc_size);
secp256k1_context* ret;
size_t prealloc_size;
VERIFY_CHECK(ctx != NULL);
prealloc_size = secp256k1_context_preallocated_clone_size(ctx);
ret = (secp256k1_context*)checked_malloc(&ctx->error_callback, prealloc_size);
ret = secp256k1_context_preallocated_clone(ctx, ret);
return ret;
}