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-rw-r--r--lib/crypto/c_src/crypto.c87
-rw-r--r--lib/crypto/c_src/crypto_callback.c22
-rw-r--r--lib/crypto/doc/src/crypto.xml8
3 files changed, 83 insertions, 34 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c
index 925ad0c091..2e1a21178f 100644
--- a/lib/crypto/c_src/crypto.c
+++ b/lib/crypto/c_src/crypto.c
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 2010-2013. All Rights Reserved.
+ * Copyright Ericsson AB 2010-2014. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
@@ -444,6 +444,15 @@ static ERL_NIF_TERM atom_ppbasis;
static ERL_NIF_TERM atom_onbasis;
#endif
+static ErlNifResourceType* hmac_context_rtype;
+struct hmac_context
+{
+ ErlNifMutex* mtx;
+ int alive;
+ HMAC_CTX ctx;
+};
+static void hmac_context_dtor(ErlNifEnv* env, struct hmac_context*);
+
/*
#define PRINTF_ERR0(FMT) enif_fprintf(stderr, FMT "\n")
#define PRINTF_ERR1(FMT, A1) enif_fprintf(stderr, FMT "\n", A1)
@@ -498,6 +507,15 @@ static int init(ErlNifEnv* env, ERL_NIF_TERM load_info)
return 0;
}
+ hmac_context_rtype = enif_open_resource_type(env, NULL, "hmac_context",
+ (ErlNifResourceDtor*) hmac_context_dtor,
+ ERL_NIF_RT_CREATE|ERL_NIF_RT_TAKEOVER,
+ NULL);
+ if (!hmac_context_rtype) {
+ PRINTF_ERR0("CRYPTO: Could not open resource type 'hmac_context'");
+ return 0;
+ }
+
if (library_refc > 0) {
/* Repeated loading of this library (module upgrade).
* Atoms and callbacks are already set, we are done.
@@ -1280,11 +1298,19 @@ static ERL_NIF_TERM sha512_mac_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM
#endif
}
+static void hmac_context_dtor(ErlNifEnv* env, struct hmac_context *obj)
+{
+ if (obj->alive) {
+ HMAC_CTX_cleanup(&obj->ctx);
+ obj->alive = 0;
+ }
+ enif_mutex_destroy(obj->mtx);
+}
+
static ERL_NIF_TERM hmac_init(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Type, Key) */
ErlNifBinary key;
- ERL_NIF_TERM ret;
- unsigned char * ctx_buf;
+ struct hmac_context* obj;
const EVP_MD *md;
if (argv[0] == atom_sha) md = EVP_sha1();
@@ -1309,57 +1335,60 @@ static ERL_NIF_TERM hmac_init(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[
return enif_make_badarg(env);
}
- ctx_buf = enif_make_new_binary(env, sizeof(HMAC_CTX), &ret);
- HMAC_CTX_init((HMAC_CTX *) ctx_buf);
- HMAC_Init((HMAC_CTX *) ctx_buf, key.data, key.size, md);
+ obj = enif_alloc_resource(hmac_context_rtype, sizeof(struct hmac_context));
+ obj->mtx = enif_mutex_create("crypto.hmac");
+ obj->alive = 1;
+ HMAC_CTX_init(&obj->ctx);
+ HMAC_Init(&obj->ctx, key.data, key.size, md);
- return ret;
+ return enif_make_resource(env, obj);
}
static ERL_NIF_TERM hmac_update(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Context, Data) */
- ErlNifBinary context, data;
- ERL_NIF_TERM ret;
- unsigned char * ctx_buf;
+ ErlNifBinary data;
+ struct hmac_context* obj;
- if (!enif_inspect_binary(env, argv[0], &context)
- || !enif_inspect_iolist_as_binary(env, argv[1], &data)
- || context.size != sizeof(HMAC_CTX)) {
+ if (!enif_get_resource(env, argv[0], hmac_context_rtype, (void**)&obj)
+ || !enif_inspect_iolist_as_binary(env, argv[1], &data)) {
+ return enif_make_badarg(env);
+ }
+ enif_mutex_lock(obj->mtx);
+ if (!obj->alive) {
+ enif_mutex_unlock(obj->mtx);
return enif_make_badarg(env);
}
+ HMAC_Update(&obj->ctx, data.data, data.size);
+ enif_mutex_unlock(obj->mtx);
- ctx_buf = enif_make_new_binary(env, sizeof(HMAC_CTX), &ret);
- memcpy(ctx_buf, context.data, context.size);
- HMAC_Update((HMAC_CTX *)ctx_buf, data.data, data.size);
CONSUME_REDS(env,data);
-
- return ret;
+ return argv[0];
}
static ERL_NIF_TERM hmac_final(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Context) or (Context, HashLen) */
- ErlNifBinary context;
ERL_NIF_TERM ret;
- HMAC_CTX ctx;
+ struct hmac_context* obj;
unsigned char mac_buf[EVP_MAX_MD_SIZE];
unsigned char * mac_bin;
unsigned int req_len = 0;
unsigned int mac_len;
- if (!enif_inspect_binary(env, argv[0], &context)) {
- return enif_make_badarg(env);
- }
- if (argc == 2 && !enif_get_uint(env, argv[1], &req_len)) {
+ if (!enif_get_resource(env,argv[0],hmac_context_rtype, (void**)&obj)
+ || (argc == 2 && !enif_get_uint(env, argv[1], &req_len))) {
return enif_make_badarg(env);
}
- if (context.size != sizeof(ctx)) {
- return enif_make_badarg(env);
+ enif_mutex_lock(obj->mtx);
+ if (!obj->alive) {
+ enif_mutex_unlock(obj->mtx);
+ return enif_make_badarg(env);
}
- memcpy(&ctx, context.data, context.size);
- HMAC_Final(&ctx, mac_buf, &mac_len);
- HMAC_CTX_cleanup(&ctx);
+ HMAC_Final(&obj->ctx, mac_buf, &mac_len);
+ HMAC_CTX_cleanup(&obj->ctx);
+ obj->alive = 0;
+ enif_mutex_unlock(obj->mtx);
if (argc == 2 && req_len < mac_len) {
/* Only truncate to req_len bytes if asked. */
diff --git a/lib/crypto/c_src/crypto_callback.c b/lib/crypto/c_src/crypto_callback.c
index 81106b4cc2..a08dcec463 100644
--- a/lib/crypto/c_src/crypto_callback.c
+++ b/lib/crypto/c_src/crypto_callback.c
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 2012. All Rights Reserved.
+ * Copyright Ericsson AB 2014. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
@@ -17,6 +17,7 @@
* %CopyrightEnd%
*/
+#include <stdio.h>
#include <string.h>
#include <openssl/opensslconf.h>
@@ -51,13 +52,28 @@ DLLEXPORT struct crypto_callbacks* get_crypto_callbacks(int nlocks);
static ErlNifRWLock** lock_vec = NULL; /* Static locks used by openssl */
+static void nomem(size_t size, const char* op)
+{
+ fprintf(stderr, "Out of memory abort. Crypto failed to %s %zu bytes.\r\n",
+ op, size);
+ abort();
+}
+
static void* crypto_alloc(size_t size)
{
- return enif_alloc(size);
+ void *ret = enif_alloc(size);
+
+ if (!ret && size)
+ nomem(size, "allocate");
+ return ret;
}
static void* crypto_realloc(void* ptr, size_t size)
{
- return enif_realloc(ptr, size);
+ void* ret = enif_realloc(ptr, size);
+
+ if (!ret && size)
+ nomem(size, "reallocate");
+ return ret;
}
static void crypto_free(void* ptr)
{
diff --git a/lib/crypto/doc/src/crypto.xml b/lib/crypto/doc/src/crypto.xml
index 40f829e704..c95827c371 100644
--- a/lib/crypto/doc/src/crypto.xml
+++ b/lib/crypto/doc/src/crypto.xml
@@ -4,7 +4,7 @@
<erlref>
<header>
<copyright>
- <year>1999</year><year>2013</year>
+ <year>1999</year><year>2014</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
@@ -366,7 +366,11 @@
or to one of the functions <seealso marker="#hmac_final-1">hmac_final</seealso> and
<seealso marker="#hmac_final_n-2">hmac_final_n</seealso>
</p>
-
+ <warning><p>Do not use a <c>Context</c> as argument in more than one
+ call to hmac_update or hmac_final. The semantics of reusing old contexts
+ in any way is undefined and could even crash the VM in earlier releases.
+ The reason for this limitation is a lack of support in the underlying
+ OpenSSL API.</p></warning>
</desc>
</func>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 11:13:41 +0000