import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

security/nss/lib/freebl/nsslowhash.c

@@ -0,0 +1,150 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifdef FREEBL_NO_DEPEND
+#include "stubs.h"
+#endif
+#include "prtypes.h"
+#include "secerr.h"
+#include "blapi.h"
+#include "hasht.h"
+#include "plhash.h"
+#include "nsslowhash.h"
+#include "blapii.h"
+
+struct NSSLOWInitContextStr {
+    int count;
+};
+
+struct NSSLOWHASHContextStr {
+    const SECHashObject *hashObj;
+    void *hashCtxt;
+};
+
+static int
+nsslow_GetFIPSEnabled(void)
+{
+#ifdef LINUX
+    FILE *f;
+    char d;
+    size_t size;
+
+    f = fopen("/proc/sys/crypto/fips_enabled", "r");
+    if (!f)
+        return 0;
+
+    size = fread(&d, 1, 1, f);
+    fclose(f);
+    if (size != 1)
+        return 0;
+    if (d != '1')
+        return 0;
+#endif
+    return 1;
+}
+
+static NSSLOWInitContext dummyContext = { 0 };
+static PRBool post_failed = PR_TRUE;
+
+NSSLOWInitContext *
+NSSLOW_Init(void)
+{
+#ifdef FREEBL_NO_DEPEND
+    (void)FREEBL_InitStubs();
+#endif
+
+    /* make sure the FIPS product is installed if we are trying to
+     * go into FIPS mode */
+    if (nsslow_GetFIPSEnabled()) {
+        if (BL_FIPSEntryOK(PR_TRUE) != SECSuccess) {
+            PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
+            post_failed = PR_TRUE;
+            return NULL;
+        }
+    }
+    post_failed = PR_FALSE;
+
+    return &dummyContext;
+}
+
+void
+NSSLOW_Shutdown(NSSLOWInitContext *context)
+{
+    PORT_Assert(context == &dummyContext);
+    return;
+}
+
+void
+NSSLOW_Reset(NSSLOWInitContext *context)
+{
+    PORT_Assert(context == &dummyContext);
+    return;
+}
+
+NSSLOWHASHContext *
+NSSLOWHASH_NewContext(NSSLOWInitContext *initContext,
+                      HASH_HashType hashType)
+{
+    NSSLOWHASHContext *context;
+
+    if (post_failed) {
+        PORT_SetError(SEC_ERROR_PKCS11_DEVICE_ERROR);
+        return NULL;
+    }
+
+    if (initContext != &dummyContext) {
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return (NULL);
+    }
+
+    context = PORT_ZNew(NSSLOWHASHContext);
+    if (!context) {
+        return NULL;
+    }
+    context->hashObj = HASH_GetRawHashObject(hashType);
+    if (!context->hashObj) {
+        PORT_Free(context);
+        return NULL;
+    }
+    context->hashCtxt = context->hashObj->create();
+    if (!context->hashCtxt) {
+        PORT_Free(context);
+        return NULL;
+    }
+
+    return context;
+}
+
+void
+NSSLOWHASH_Begin(NSSLOWHASHContext *context)
+{
+    return context->hashObj->begin(context->hashCtxt);
+}
+
+void
+NSSLOWHASH_Update(NSSLOWHASHContext *context, const unsigned char *buf,
+                  unsigned int len)
+{
+    return context->hashObj->update(context->hashCtxt, buf, len);
+}
+
+void
+NSSLOWHASH_End(NSSLOWHASHContext *context, unsigned char *buf,
+               unsigned int *ret, unsigned int len)
+{
+    return context->hashObj->end(context->hashCtxt, buf, ret, len);
+}
+
+void
+NSSLOWHASH_Destroy(NSSLOWHASHContext *context)
+{
+    context->hashObj->destroy(context->hashCtxt, PR_TRUE);
+    PORT_Free(context);
+}
+
+unsigned int
+NSSLOWHASH_Length(NSSLOWHASHContext *context)
+{
+    return context->hashObj->length;
+}