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Change the ossl3 context to be allocated once #99

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merged 1 commit into from
Feb 26, 2024
Merged

Change the ossl3 context to be allocated once #99

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30 changes: 23 additions & 7 deletions src/crypto.c
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Original file line number Diff line number Diff line change
Expand Up @@ -98,27 +98,44 @@ typedef struct ossl3_library_context {
OSSL_PROVIDER *default_provider;
} ossl3_context_t;

static ossl3_context_t *init_ossl3_ctx()
static pthread_once_t global_ossl3_ctx_init = PTHREAD_ONCE_INIT;
static ossl3_context_t *global_ossl3_ctx = NULL;

static void init_global_ossl3_ctx(void)
{
ossl3_context_t *ctx = OPENSSL_malloc(sizeof(ossl3_context_t));
if (!ctx) return NULL;
if (!ctx) return;

ctx->libctx = OSSL_LIB_CTX_new();
if (!ctx->libctx) {
OPENSSL_free(ctx);
return NULL;
return;
}

/* Load both legacy and default provider as both may be needed */
/* if they fail keep going and an error will be raised when we try to
* fetch the cipher later */
ctx->legacy_provider = OSSL_PROVIDER_load(ctx->libctx, "legacy");
ctx->default_provider = OSSL_PROVIDER_load(ctx->libctx, "default");
return ctx;
global_ossl3_ctx = ctx;
}

static ossl3_context_t *get_ossl3_ctx()
{
int ret;

ret = pthread_once(&global_ossl3_ctx_init, init_global_ossl3_ctx);
if (ret != 0) {
return NULL;
}

return global_ossl3_ctx;
}

static void free_ossl3_ctx(ossl3_context_t *ctx)
__attribute__((destructor))
static void free_ossl3_ctx()
{
ossl3_context_t *ctx = global_ossl3_ctx;
if (ctx == NULL) return;
if (ctx->legacy_provider) OSSL_PROVIDER_unload(ctx->legacy_provider);
if (ctx->default_provider) OSSL_PROVIDER_unload(ctx->default_provider);
Expand Down Expand Up @@ -178,7 +195,7 @@ int MD4_HASH(struct ntlm_buffer *payload,
EVP_MD *md;
int ret;

ossl3_ctx = init_ossl3_ctx();
ossl3_ctx = get_ossl3_ctx();
if (ossl3_ctx == NULL) {
ret = ERR_CRYPTO;
goto done;
Expand All @@ -193,7 +210,6 @@ int MD4_HASH(struct ntlm_buffer *payload,
ret = mdx_hash(md, payload, result);

done:
free_ossl3_ctx(ossl3_ctx);
return ret;
#else
return mdx_hash(EVP_md4(), payload, result);
Expand Down
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