From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 security/nss/lib/util/secdig.c | 182 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 182 insertions(+)
 create mode 100644 security/nss/lib/util/secdig.c

(limited to 'security/nss/lib/util/secdig.c')

diff --git a/security/nss/lib/util/secdig.c b/security/nss/lib/util/secdig.c
new file mode 100644
index 000000000..f4deec54b
--- /dev/null
+++ b/security/nss/lib/util/secdig.c
@@ -0,0 +1,182 @@
+/* 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/. */
+#include "secdig.h"
+
+#include "secoid.h"
+#include "secasn1.h"
+#include "secerr.h"
+
+/*
+ * XXX Want to have a SGN_DecodeDigestInfo, like:
+ *  SGNDigestInfo *SGN_DecodeDigestInfo(SECItem *didata);
+ * that creates a pool and allocates from it and decodes didata into
+ * the newly allocated DigestInfo structure.  Then fix secvfy.c (it
+ * will no longer need an arena itself) to call this and then call
+ * DestroyDigestInfo when it is done, then can remove the old template
+ * above and keep our new template static and "hidden".
+ */
+
+/*
+ * XXX It might be nice to combine the following two functions (create
+ * and encode).  I think that is all anybody ever wants to do anyway.
+ */
+
+SECItem *
+SGN_EncodeDigestInfo(PLArenaPool *poolp, SECItem *dest, SGNDigestInfo *diginfo)
+{
+    return SEC_ASN1EncodeItem(poolp, dest, diginfo, sgn_DigestInfoTemplate);
+}
+
+SGNDigestInfo *
+SGN_CreateDigestInfo(SECOidTag algorithm, const unsigned char *sig,
+                     unsigned len)
+{
+    SGNDigestInfo *di;
+    SECStatus rv;
+    PLArenaPool *arena;
+    SECItem *null_param;
+    SECItem dummy_value;
+
+    switch (algorithm) {
+        case SEC_OID_MD2:
+        case SEC_OID_MD5:
+        case SEC_OID_SHA1:
+        case SEC_OID_SHA224:
+        case SEC_OID_SHA256:
+        case SEC_OID_SHA384:
+        case SEC_OID_SHA512:
+            break;
+        default:
+            PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
+            return NULL;
+    }
+
+    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
+    if (arena == NULL) {
+        return NULL;
+    }
+
+    di = (SGNDigestInfo *)PORT_ArenaZAlloc(arena, sizeof(SGNDigestInfo));
+    if (di == NULL) {
+        PORT_FreeArena(arena, PR_FALSE);
+        return NULL;
+    }
+
+    di->arena = arena;
+
+    /*
+     * PKCS #1 specifies that the AlgorithmID must have a NULL parameter
+     * (as opposed to no parameter at all).
+     */
+    dummy_value.data = NULL;
+    dummy_value.len = 0;
+    null_param = SEC_ASN1EncodeItem(NULL, NULL, &dummy_value, SEC_NullTemplate);
+    if (null_param == NULL) {
+        goto loser;
+    }
+
+    rv = SECOID_SetAlgorithmID(arena, &di->digestAlgorithm, algorithm,
+                               null_param);
+
+    SECITEM_FreeItem(null_param, PR_TRUE);
+
+    if (rv != SECSuccess) {
+        goto loser;
+    }
+
+    di->digest.data = (unsigned char *)PORT_ArenaAlloc(arena, len);
+    if (di->digest.data == NULL) {
+        goto loser;
+    }
+
+    di->digest.len = len;
+    PORT_Memcpy(di->digest.data, sig, len);
+    return di;
+
+loser:
+    SGN_DestroyDigestInfo(di);
+    return NULL;
+}
+
+SGNDigestInfo *
+SGN_DecodeDigestInfo(SECItem *didata)
+{
+    PLArenaPool *arena;
+    SGNDigestInfo *di;
+    SECStatus rv = SECFailure;
+    SECItem diCopy = { siBuffer, NULL, 0 };
+
+    arena = PORT_NewArena(SEC_ASN1_DEFAULT_ARENA_SIZE);
+    if (arena == NULL)
+        return NULL;
+
+    rv = SECITEM_CopyItem(arena, &diCopy, didata);
+    if (rv != SECSuccess) {
+        PORT_FreeArena(arena, PR_FALSE);
+        return NULL;
+    }
+
+    di = (SGNDigestInfo *)PORT_ArenaZAlloc(arena, sizeof(SGNDigestInfo));
+    if (di != NULL) {
+        di->arena = arena;
+        rv = SEC_QuickDERDecodeItem(arena, di, sgn_DigestInfoTemplate, &diCopy);
+    }
+
+    if ((di == NULL) || (rv != SECSuccess)) {
+        PORT_FreeArena(arena, PR_FALSE);
+        di = NULL;
+    }
+
+    return di;
+}
+
+void
+SGN_DestroyDigestInfo(SGNDigestInfo *di)
+{
+    if (di && di->arena) {
+        PORT_FreeArena(di->arena, PR_FALSE);
+    }
+
+    return;
+}
+
+SECStatus
+SGN_CopyDigestInfo(PLArenaPool *poolp, SGNDigestInfo *a, SGNDigestInfo *b)
+{
+    SECStatus rv;
+    void *mark;
+
+    if ((poolp == NULL) || (a == NULL) || (b == NULL))
+        return SECFailure;
+
+    mark = PORT_ArenaMark(poolp);
+    a->arena = poolp;
+    rv = SECOID_CopyAlgorithmID(poolp, &a->digestAlgorithm,
+                                &b->digestAlgorithm);
+    if (rv == SECSuccess)
+        rv = SECITEM_CopyItem(poolp, &a->digest, &b->digest);
+
+    if (rv != SECSuccess) {
+        PORT_ArenaRelease(poolp, mark);
+    } else {
+        PORT_ArenaUnmark(poolp, mark);
+    }
+
+    return rv;
+}
+
+SECComparison
+SGN_CompareDigestInfo(SGNDigestInfo *a, SGNDigestInfo *b)
+{
+    SECComparison rv;
+
+    /* Check signature algorithm's */
+    rv = SECOID_CompareAlgorithmID(&a->digestAlgorithm, &b->digestAlgorithm);
+    if (rv)
+        return rv;
+
+    /* Compare signature block length's */
+    rv = SECITEM_CompareItem(&a->digest, &b->digest);
+    return rv;
+}
-- 
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