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Diffstat (limited to 'security/nss/lib/freebl/desblapi.c')
-rw-r--r--security/nss/lib/freebl/desblapi.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/desblapi.c b/security/nss/lib/freebl/desblapi.c
new file mode 100644
index 0000000000..c03ab27cce
--- /dev/null
+++ b/security/nss/lib/freebl/desblapi.c
@@ -0,0 +1,256 @@
+/*
+ * desblapi.c
+ *
+ * core source file for DES-150 library
+ * Implement DES Modes of Operation and Triple-DES.
+ * Adapt DES-150 to blapi API.
+ *
+ * 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 "des.h"
+#include "blapii.h"
+#include <stddef.h>
+#include "secerr.h"
+
+#if defined(NSS_X86_OR_X64)
+/* Intel X86 CPUs do unaligned loads and stores without complaint. */
+#define COPY8B(to, from, ptr) \
+ HALFPTR(to) \
+ [0] = HALFPTR(from)[0]; \
+ HALFPTR(to) \
+ [1] = HALFPTR(from)[1];
+#else
+#define COPY8B(to, from, ptr) memcpy(to, from, 8)
+#endif
+#define COPY8BTOHALF(to, from) COPY8B(to, from, from)
+#define COPY8BFROMHALF(to, from) COPY8B(to, from, to)
+
+static void
+DES_ECB(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
+{
+ while (len) {
+ DES_Do1Block(cx->ks0, in, out);
+ len -= 8;
+ in += 8;
+ out += 8;
+ }
+}
+
+static void
+DES_EDE3_ECB(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
+{
+ while (len) {
+ DES_Do1Block(cx->ks0, in, out);
+ len -= 8;
+ in += 8;
+ DES_Do1Block(cx->ks1, out, out);
+ DES_Do1Block(cx->ks2, out, out);
+ out += 8;
+ }
+}
+
+static void NO_SANITIZE_ALIGNMENT
+DES_CBCEn(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
+{
+ const BYTE *bufend = in + len;
+ HALF vec[2];
+
+ while (in != bufend) {
+ COPY8BTOHALF(vec, in);
+ in += 8;
+ vec[0] ^= cx->iv[0];
+ vec[1] ^= cx->iv[1];
+ DES_Do1Block(cx->ks0, (BYTE *)vec, (BYTE *)cx->iv);
+ COPY8BFROMHALF(out, cx->iv);
+ out += 8;
+ }
+}
+
+static void NO_SANITIZE_ALIGNMENT
+DES_CBCDe(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
+{
+ const BYTE *bufend;
+ HALF oldciphertext[2];
+ HALF plaintext[2];
+
+ for (bufend = in + len; in != bufend;) {
+ oldciphertext[0] = cx->iv[0];
+ oldciphertext[1] = cx->iv[1];
+ COPY8BTOHALF(cx->iv, in);
+ in += 8;
+ DES_Do1Block(cx->ks0, (BYTE *)cx->iv, (BYTE *)plaintext);
+ plaintext[0] ^= oldciphertext[0];
+ plaintext[1] ^= oldciphertext[1];
+ COPY8BFROMHALF(out, plaintext);
+ out += 8;
+ }
+}
+
+static void NO_SANITIZE_ALIGNMENT
+DES_EDE3CBCEn(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
+{
+ const BYTE *bufend = in + len;
+ HALF vec[2];
+
+ while (in != bufend) {
+ COPY8BTOHALF(vec, in);
+ in += 8;
+ vec[0] ^= cx->iv[0];
+ vec[1] ^= cx->iv[1];
+ DES_Do1Block(cx->ks0, (BYTE *)vec, (BYTE *)cx->iv);
+ DES_Do1Block(cx->ks1, (BYTE *)cx->iv, (BYTE *)cx->iv);
+ DES_Do1Block(cx->ks2, (BYTE *)cx->iv, (BYTE *)cx->iv);
+ COPY8BFROMHALF(out, cx->iv);
+ out += 8;
+ }
+}
+
+static void NO_SANITIZE_ALIGNMENT
+DES_EDE3CBCDe(DESContext *cx, BYTE *out, const BYTE *in, unsigned int len)
+{
+ const BYTE *bufend;
+ HALF oldciphertext[2];
+ HALF plaintext[2];
+
+ for (bufend = in + len; in != bufend;) {
+ oldciphertext[0] = cx->iv[0];
+ oldciphertext[1] = cx->iv[1];
+ COPY8BTOHALF(cx->iv, in);
+ in += 8;
+ DES_Do1Block(cx->ks0, (BYTE *)cx->iv, (BYTE *)plaintext);
+ DES_Do1Block(cx->ks1, (BYTE *)plaintext, (BYTE *)plaintext);
+ DES_Do1Block(cx->ks2, (BYTE *)plaintext, (BYTE *)plaintext);
+ plaintext[0] ^= oldciphertext[0];
+ plaintext[1] ^= oldciphertext[1];
+ COPY8BFROMHALF(out, plaintext);
+ out += 8;
+ }
+}
+
+DESContext *
+DES_AllocateContext(void)
+{
+ return PORT_ZNew(DESContext);
+}
+
+SECStatus
+DES_InitContext(DESContext *cx, const unsigned char *key, unsigned int keylen,
+ const unsigned char *iv, int mode, unsigned int encrypt,
+ unsigned int unused)
+{
+ DESDirection opposite;
+ if (!cx) {
+ PORT_SetError(SEC_ERROR_INVALID_ARGS);
+ return SECFailure;
+ }
+ cx->direction = encrypt ? DES_ENCRYPT : DES_DECRYPT;
+ opposite = encrypt ? DES_DECRYPT : DES_ENCRYPT;
+ switch (mode) {
+ case NSS_DES: /* DES ECB */
+ DES_MakeSchedule(cx->ks0, key, cx->direction);
+ cx->worker = &DES_ECB;
+ break;
+
+ case NSS_DES_EDE3: /* DES EDE ECB */
+ cx->worker = &DES_EDE3_ECB;
+ if (encrypt) {
+ DES_MakeSchedule(cx->ks0, key, cx->direction);
+ DES_MakeSchedule(cx->ks1, key + 8, opposite);
+ DES_MakeSchedule(cx->ks2, key + 16, cx->direction);
+ } else {
+ DES_MakeSchedule(cx->ks2, key, cx->direction);
+ DES_MakeSchedule(cx->ks1, key + 8, opposite);
+ DES_MakeSchedule(cx->ks0, key + 16, cx->direction);
+ }
+ break;
+
+ case NSS_DES_CBC: /* DES CBC */
+ COPY8BTOHALF(cx->iv, iv);
+ cx->worker = encrypt ? &DES_CBCEn : &DES_CBCDe;
+ DES_MakeSchedule(cx->ks0, key, cx->direction);
+ break;
+
+ case NSS_DES_EDE3_CBC: /* DES EDE CBC */
+ COPY8BTOHALF(cx->iv, iv);
+ if (encrypt) {
+ cx->worker = &DES_EDE3CBCEn;
+ DES_MakeSchedule(cx->ks0, key, cx->direction);
+ DES_MakeSchedule(cx->ks1, key + 8, opposite);
+ DES_MakeSchedule(cx->ks2, key + 16, cx->direction);
+ } else {
+ cx->worker = &DES_EDE3CBCDe;
+ DES_MakeSchedule(cx->ks2, key, cx->direction);
+ DES_MakeSchedule(cx->ks1, key + 8, opposite);
+ DES_MakeSchedule(cx->ks0, key + 16, cx->direction);
+ }
+ break;
+
+ default:
+ PORT_SetError(SEC_ERROR_INVALID_ARGS);
+ return SECFailure;
+ }
+ return SECSuccess;
+}
+
+DESContext *
+DES_CreateContext(const BYTE *key, const BYTE *iv, int mode, PRBool encrypt)
+{
+ DESContext *cx = PORT_ZNew(DESContext);
+ SECStatus rv = DES_InitContext(cx, key, 0, iv, mode, encrypt, 0);
+
+ if (rv != SECSuccess) {
+ PORT_ZFree(cx, sizeof *cx);
+ cx = NULL;
+ }
+ return cx;
+}
+
+void
+DES_DestroyContext(DESContext *cx, PRBool freeit)
+{
+ if (cx) {
+ memset(cx, 0, sizeof *cx);
+ if (freeit)
+ PORT_Free(cx);
+ }
+}
+
+SECStatus
+DES_Encrypt(DESContext *cx, BYTE *out, unsigned int *outLen,
+ unsigned int maxOutLen, const BYTE *in, unsigned int inLen)
+{
+
+ if ((inLen % 8) != 0 || maxOutLen < inLen || !cx ||
+ cx->direction != DES_ENCRYPT) {
+ PORT_SetError(SEC_ERROR_INVALID_ARGS);
+ return SECFailure;
+ }
+
+ cx->worker(cx, out, in, inLen);
+ if (outLen)
+ *outLen = inLen;
+ return SECSuccess;
+}
+
+SECStatus
+DES_Decrypt(DESContext *cx, BYTE *out, unsigned int *outLen,
+ unsigned int maxOutLen, const BYTE *in, unsigned int inLen)
+{
+
+ if ((inLen % 8) != 0 || maxOutLen < inLen || !cx ||
+ cx->direction != DES_DECRYPT) {
+ PORT_SetError(SEC_ERROR_INVALID_ARGS);
+ return SECFailure;
+ }
+
+ cx->worker(cx, out, in, inLen);
+ if (outLen)
+ *outLen = inLen;
+ return SECSuccess;
+}
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