Update NSPR to 4.12 and NSS to 3.23 on iOS

nss/lib/freebl/chacha20poly1305.c

 /* 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 <string.h>
 #include <stdio.h>
 
 #include "seccomon.h"
 #include "secerr.h"
 #include "blapit.h"
-#include "poly1305/poly1305.h"
-#include "chacha20/chacha20.h"
+
+#ifndef NSS_DISABLE_CHACHAPOLY
+#include "poly1305.h"
+#include "chacha20.h"
 #include "chacha20poly1305.h"
+#endif
 
 /* Poly1305Do writes the Poly1305 authenticator of the given additional data
  * and ciphertext to |out|. */
+#ifndef NSS_DISABLE_CHACHAPOLY
 static void
-Poly1305Do(unsigned char *out,
-           const unsigned char *ad, unsigned int adLen,
-           const unsigned char *ciphertext, unsigned int ciphertextLen,
-           const unsigned char key[32])
+Poly1305Do(unsigned char *out, const unsigned char *ad, unsigned int adLen,
+           const unsigned char *ciphertext, unsigned int ciphertextLen,
+           const unsigned char key[32])
 {
     poly1305_state state;
     unsigned int j;
     unsigned char lengthBytes[8];
+    static const unsigned char zeros[15];
     unsigned int i;
 
     Poly1305Init(&state, key);
+    Poly1305Update(&state, ad, adLen);
+    if (adLen % 16 > 0) {
+        Poly1305Update(&state, zeros, 16 - adLen % 16);
+    }
+    Poly1305Update(&state, ciphertext, ciphertextLen);
+    if (ciphertextLen % 16 > 0) {
+        Poly1305Update(&state, zeros, 16 - ciphertextLen % 16);
+    }
     j = adLen;
     for (i = 0; i < sizeof(lengthBytes); i++) {
-        lengthBytes[i] = j;
-        j >>= 8;
+        lengthBytes[i] = j;
+        j >>= 8;
     }
-    Poly1305Update(&state, ad, adLen);
     Poly1305Update(&state, lengthBytes, sizeof(lengthBytes));
     j = ciphertextLen;
     for (i = 0; i < sizeof(lengthBytes); i++) {
-        lengthBytes[i] = j;
-        j >>= 8;
+        lengthBytes[i] = j;
+        j >>= 8;
     }
-    Poly1305Update(&state, ciphertext, ciphertextLen);
     Poly1305Update(&state, lengthBytes, sizeof(lengthBytes));
     Poly1305Finish(&state, out);
 }
+#endif
 
 SECStatus
 ChaCha20Poly1305_InitContext(ChaCha20Poly1305Context *ctx,
-                             const unsigned char *key, unsigned int keyLen,
-                             unsigned int tagLen)
+                             const unsigned char *key, unsigned int keyLen,
+                             unsigned int tagLen)
 {
+#ifdef NSS_DISABLE_CHACHAPOLY
+    return SECFailure;
+#else
     if (keyLen != 32) {
-        PORT_SetError(SEC_ERROR_BAD_KEY);
-        return SECFailure;
+        PORT_SetError(SEC_ERROR_BAD_KEY);
+        return SECFailure;
     }
     if (tagLen == 0 || tagLen > 16) {
-        PORT_SetError(SEC_ERROR_INPUT_LEN);
-        return SECFailure;
+        PORT_SetError(SEC_ERROR_INPUT_LEN);
+        return SECFailure;
     }
 
-    memcpy(ctx->key, key, sizeof(ctx->key));
+    PORT_Memcpy(ctx->key, key, sizeof(ctx->key));
     ctx->tagLen = tagLen;
 
     return SECSuccess;
+#endif
 }
 
 ChaCha20Poly1305Context *
 ChaCha20Poly1305_CreateContext(const unsigned char *key, unsigned int keyLen,
-                               unsigned int tagLen)
+                               unsigned int tagLen)
 {
+#ifdef NSS_DISABLE_CHACHAPOLY
+    return NULL;
+#else
     ChaCha20Poly1305Context *ctx;
 
     ctx = PORT_New(ChaCha20Poly1305Context);
     if (ctx == NULL) {
-        return NULL;
+        return NULL;
     }
 
     if (ChaCha20Poly1305_InitContext(ctx, key, keyLen, tagLen) != SECSuccess) {
-        PORT_Free(ctx);
-        ctx = NULL;
+        PORT_Free(ctx);
+        ctx = NULL;
     }
 
     return ctx;
+#endif
 }
 
 void
 ChaCha20Poly1305_DestroyContext(ChaCha20Poly1305Context *ctx, PRBool freeit)
 {
-    memset(ctx, 0, sizeof(*ctx));
+#ifndef NSS_DISABLE_CHACHAPOLY
+    PORT_Memset(ctx, 0, sizeof(*ctx));
     if (freeit) {
-        PORT_Free(ctx);
+        PORT_Free(ctx);
     }
+#endif
 }
 
 SECStatus
-ChaCha20Poly1305_Seal(const ChaCha20Poly1305Context *ctx,
-                      unsigned char *output, unsigned int *outputLen,
-                      unsigned int maxOutputLen,
-                      const unsigned char *input, unsigned int inputLen,
-                      const unsigned char *nonce, unsigned int nonceLen,
-                      const unsigned char *ad, unsigned int adLen)
+ChaCha20Poly1305_Seal(const ChaCha20Poly1305Context *ctx, unsigned char *output,
+                      unsigned int *outputLen, unsigned int maxOutputLen,
+                      const unsigned char *input, unsigned int inputLen,
+                      const unsigned char *nonce, unsigned int nonceLen,
+                      const unsigned char *ad, unsigned int adLen)
 {
+#ifdef NSS_DISABLE_CHACHAPOLY
+    return SECFailure;
+#else
     unsigned char block[64];
     unsigned char tag[16];
 
-    if (nonceLen != 8) {
-        PORT_SetError(SEC_ERROR_INPUT_LEN);
-        return SECFailure;
+    if (nonceLen != 12) {
+        PORT_SetError(SEC_ERROR_INPUT_LEN);
+        return SECFailure;
     }
     *outputLen = inputLen + ctx->tagLen;
     if (maxOutputLen < *outputLen) {
-        PORT_SetError(SEC_ERROR_OUTPUT_LEN);
-        return SECFailure;
+        PORT_SetError(SEC_ERROR_OUTPUT_LEN);
+        return SECFailure;
     }
 
-    memset(block, 0, sizeof(block));
+    PORT_Memset(block, 0, sizeof(block));
     // Generate a block of keystream. The first 32 bytes will be the poly1305
     // key. The remainder of the block is discarded.
     ChaCha20XOR(block, block, sizeof(block), ctx->key, nonce, 0);
     ChaCha20XOR(output, input, inputLen, ctx->key, nonce, 1);
 
     Poly1305Do(tag, ad, adLen, output, inputLen, block);
-    memcpy(output + inputLen, tag, ctx->tagLen);
+    PORT_Memcpy(output + inputLen, tag, ctx->tagLen);
 
     return SECSuccess;
+#endif
 }
 
 SECStatus
-ChaCha20Poly1305_Open(const ChaCha20Poly1305Context *ctx,
-                      unsigned char *output, unsigned int *outputLen,
-                      unsigned int maxOutputLen,
-                      const unsigned char *input, unsigned int inputLen,
-                      const unsigned char *nonce, unsigned int nonceLen,
-                      const unsigned char *ad, unsigned int adLen)
+ChaCha20Poly1305_Open(const ChaCha20Poly1305Context *ctx, unsigned char *output,
+                      unsigned int *outputLen, unsigned int maxOutputLen,
+                      const unsigned char *input, unsigned int inputLen,
+                      const unsigned char *nonce, unsigned int nonceLen,
+                      const unsigned char *ad, unsigned int adLen)
 {
+#ifdef NSS_DISABLE_CHACHAPOLY
+    return SECFailure;
+#else
     unsigned char block[64];
     unsigned char tag[16];
+    unsigned int ciphertextLen;
 
-    if (nonceLen != 8) {
-        PORT_SetError(SEC_ERROR_INPUT_LEN);
-        return SECFailure;
+    if (nonceLen != 12) {
+        PORT_SetError(SEC_ERROR_INPUT_LEN);
+        return SECFailure;
     }
     if (inputLen < ctx->tagLen) {
-        PORT_SetError(SEC_ERROR_INPUT_LEN);
-        return SECFailure;
+        PORT_SetError(SEC_ERROR_INPUT_LEN);
+        return SECFailure;
     }
-    *outputLen = inputLen - ctx->tagLen;
+    ciphertextLen = inputLen - ctx->tagLen;
+    *outputLen = ciphertextLen;
     if (maxOutputLen < *outputLen) {
-        PORT_SetError(SEC_ERROR_OUTPUT_LEN);
-        return SECFailure;
+        PORT_SetError(SEC_ERROR_OUTPUT_LEN);
+        return SECFailure;
     }
 
-    memset(block, 0, sizeof(block));
+    PORT_Memset(block, 0, sizeof(block));
     // Generate a block of keystream. The first 32 bytes will be the poly1305
     // key. The remainder of the block is discarded.
     ChaCha20XOR(block, block, sizeof(block), ctx->key, nonce, 0);
-    Poly1305Do(tag, ad, adLen, input, inputLen - ctx->tagLen, block);
-    if (NSS_SecureMemcmp(tag, &input[inputLen - ctx->tagLen], ctx->tagLen) != 0) {
-        PORT_SetError(SEC_ERROR_BAD_DATA);
-        return SECFailure;
+    Poly1305Do(tag, ad, adLen, input, ciphertextLen, block);
+    if (NSS_SecureMemcmp(tag, &input[ciphertextLen], ctx->tagLen) != 0) {
+        PORT_SetError(SEC_ERROR_BAD_DATA);
+        return SECFailure;
     }
 
-    ChaCha20XOR(output, input, inputLen - ctx->tagLen, ctx->key, nonce, 1);
+    ChaCha20XOR(output, input, ciphertextLen, ctx->key, nonce, 1);
 
     return SECSuccess;
+#endif
 }