1 files changed, 53 insertions, 62 deletions

diff --git a/applypatch/main.c b/applypatch/main.cpp
index 8e9fe80ef..7606d5d3c 100644
--- a/applypatch/main.c
+++ b/applypatch/main.cpp
@@ -19,18 +19,21 @@
 #include <string.h>
 #include <unistd.h>
 
+#include <memory>
+#include <vector>
+
 #include "applypatch.h"
 #include "edify/expr.h"
-#include "mincrypt/sha.h"
+#include "openssl/sha.h"
 
-int CheckMode(int argc, char** argv) {
+static int CheckMode(int argc, char** argv) {
     if (argc < 3) {
         return 2;
     }
     return applypatch_check(argv[2], argc-3, argv+3);
 }
 
-int SpaceMode(int argc, char** argv) {
+static int SpaceMode(int argc, char** argv) {
     if (argc != 3) {
         return 2;
     }
@@ -45,19 +48,13 @@ int SpaceMode(int argc, char** argv) {
 
 // Parse arguments (which should be of the form "<sha1>" or
 // "<sha1>:<filename>" into the new parallel arrays *sha1s and
-// *patches (loading file contents into the patches).  Returns 0 on
+// *patches (loading file contents into the patches).  Returns true on
 // success.
-static int ParsePatchArgs(int argc, char** argv,
-                          char*** sha1s, Value*** patches, int* num_patches) {
-    *num_patches = argc;
-    *sha1s = malloc(*num_patches * sizeof(char*));
-    *patches = malloc(*num_patches * sizeof(Value*));
-    memset(*patches, 0, *num_patches * sizeof(Value*));
-
-    uint8_t digest[SHA_DIGEST_SIZE];
+static bool ParsePatchArgs(int argc, char** argv, std::vector<char*>* sha1s,
+                           std::vector<std::unique_ptr<Value, decltype(&FreeValue)>>* patches) {
+    uint8_t digest[SHA_DIGEST_LENGTH];
 
-    int i;
-    for (i = 0; i < *num_patches; ++i) {
+    for (int i = 0; i < argc; ++i) {
         char* colon = strchr(argv[i], ':');
         if (colon != NULL) {
             *colon = '\0';
@@ -66,56 +63,49 @@ static int ParsePatchArgs(int argc, char** argv,
 
         if (ParseSha1(argv[i], digest) != 0) {
             printf("failed to parse sha1 \"%s\"\n", argv[i]);
-            return -1;
+            return false;
         }
 
-        (*sha1s)[i] = argv[i];
+        sha1s->push_back(argv[i]);
         if (colon == NULL) {
-            (*patches)[i] = NULL;
+            patches->emplace_back(nullptr, FreeValue);
         } else {
             FileContents fc;
             if (LoadFileContents(colon, &fc) != 0) {
-                goto abort;
+                return false;
             }
-            (*patches)[i] = malloc(sizeof(Value));
-            (*patches)[i]->type = VAL_BLOB;
-            (*patches)[i]->size = fc.size;
-            (*patches)[i]->data = (char*)fc.data;
+            std::unique_ptr<Value, decltype(&FreeValue)> value(new Value, FreeValue);
+            value->type = VAL_BLOB;
+            value->size = fc.size;
+            value->data = reinterpret_cast<char*>(fc.data);
+            patches->push_back(std::move(value));
         }
     }
+    return true;
+}
 
-    return 0;
-
-  abort:
-    for (i = 0; i < *num_patches; ++i) {
-        Value* p = (*patches)[i];
-        if (p != NULL) {
-            free(p->data);
-            free(p);
-        }
-    }
-    free(*sha1s);
-    free(*patches);
-    return -1;
+static int FlashMode(const char* src_filename, const char* tgt_filename,
+                     const char* tgt_sha1, size_t tgt_size) {
+    return applypatch_flash(src_filename, tgt_filename, tgt_sha1, tgt_size);
 }
 
-int PatchMode(int argc, char** argv) {
-    Value* bonus = NULL;
+static int PatchMode(int argc, char** argv) {
+    std::unique_ptr<Value, decltype(&FreeValue)> bonus(nullptr, FreeValue);
     if (argc >= 3 && strcmp(argv[1], "-b") == 0) {
         FileContents fc;
         if (LoadFileContents(argv[2], &fc) != 0) {
             printf("failed to load bonus file %s\n", argv[2]);
             return 1;
         }
-        bonus = malloc(sizeof(Value));
+        bonus.reset(new Value);
         bonus->type = VAL_BLOB;
         bonus->size = fc.size;
-        bonus->data = (char*)fc.data;
+        bonus->data = reinterpret_cast<char*>(fc.data);
         argc -= 2;
         argv += 2;
     }
 
-    if (argc < 6) {
+    if (argc < 4) {
         return 2;
     }
 
@@ -126,33 +116,30 @@ int PatchMode(int argc, char** argv) {
         return 1;
     }
 
-    char** sha1s;
-    Value** patches;
-    int num_patches;
-    if (ParsePatchArgs(argc-5, argv+5, &sha1s, &patches, &num_patches) != 0) {
-        printf("failed to parse patch args\n");
-        return 1;
+    // If no <src-sha1>:<patch> is provided, it is in flash mode.
+    if (argc == 5) {
+        if (bonus != NULL) {
+            printf("bonus file not supported in flash mode\n");
+            return 1;
+        }
+        return FlashMode(argv[1], argv[2], argv[3], target_size);
     }
 
-    int result = applypatch(argv[1], argv[2], argv[3], target_size,
-                            num_patches, sha1s, patches, bonus);
 
-    int i;
-    for (i = 0; i < num_patches; ++i) {
-        Value* p = patches[i];
-        if (p != NULL) {
-            free(p->data);
-            free(p);
-        }
-    }
-    if (bonus) {
-        free(bonus->data);
-        free(bonus);
+    std::vector<char*> sha1s;
+    std::vector<std::unique_ptr<Value, decltype(&FreeValue)>> patches;
+    if (!ParsePatchArgs(argc-5, argv+5, &sha1s, &patches)) {
+        printf("failed to parse patch args\n");
+        return 1;
     }
-    free(sha1s);
-    free(patches);
 
-    return result;
+    std::vector<Value*> patch_ptrs;
+    for (const auto& p : patches) {
+        patch_ptrs.push_back(p.get());
+    }
+    return applypatch(argv[1], argv[2], argv[3], target_size,
+                      patch_ptrs.size(), sha1s.data(),
+                      patch_ptrs.data(), bonus.get());
 }
 
 // This program applies binary patches to files in a way that is safe
@@ -163,6 +150,10 @@ int PatchMode(int argc, char** argv) {
 // - if the sha1 hash of <tgt-file> is <tgt-sha1>, does nothing and exits
 //   successfully.
 //
+// - otherwise, if no <src-sha1>:<patch> is provided, flashes <tgt-file> with
+//   <src-file>. <tgt-file> must be a partition name, while <src-file> must
+//   be a regular image file. <src-file> will not be deleted on success.
+//
 // - otherwise, if the sha1 hash of <src-file> is <src-sha1>, applies the
 //   bsdiff <patch> to <src-file> to produce a new file (the type of patch
 //   is automatically detected from the file header).  If that new