diff options
Diffstat (limited to 'updater')
| -rw-r--r-- | updater/install.c | 236 | ||||
| -rw-r--r-- | updater/updater.c | 6 |
2 files changed, 190 insertions, 52 deletions
diff --git a/updater/install.c b/updater/install.c index 852b393ea..2ffb3842f 100644 --- a/updater/install.c +++ b/updater/install.c @@ -29,17 +29,18 @@ #include "cutils/misc.h" #include "cutils/properties.h" #include "edify/expr.h" +#include "mincrypt/sha.h" #include "minzip/DirUtil.h" #include "mtdutils/mounts.h" #include "mtdutils/mtdutils.h" #include "updater.h" - +#include "applypatch/applypatch.h" // mount(type, location, mount_point) // // what: type="MTD" location="<partition>" to mount a yaffs2 filesystem // type="vfat" location="/dev/block/<whatever>" to mount a device -char* MountFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* MountFn(const char* name, State* state, int argc, Expr* argv[]) { char* result = NULL; if (argc != 3) { return ErrorAbort(state, "%s() expects 3 args, got %d", name, argc); @@ -98,12 +99,12 @@ done: free(type); free(location); if (result != mount_point) free(mount_point); - return result; + return StringValue(result); } // is_mounted(mount_point) -char* IsMountedFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* IsMountedFn(const char* name, State* state, int argc, Expr* argv[]) { char* result = NULL; if (argc != 1) { return ErrorAbort(state, "%s() expects 1 arg, got %d", name, argc); @@ -127,11 +128,11 @@ char* IsMountedFn(const char* name, State* state, int argc, Expr* argv[]) { done: if (result != mount_point) free(mount_point); - return result; + return StringValue(result); } -char* UnmountFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* UnmountFn(const char* name, State* state, int argc, Expr* argv[]) { char* result = NULL; if (argc != 1) { return ErrorAbort(state, "%s() expects 1 arg, got %d", name, argc); @@ -157,14 +158,14 @@ char* UnmountFn(const char* name, State* state, int argc, Expr* argv[]) { done: if (result != mount_point) free(mount_point); - return result; + return StringValue(result); } // format(type, location) // // type="MTD" location=partition -char* FormatFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* FormatFn(const char* name, State* state, int argc, Expr* argv[]) { char* result = NULL; if (argc != 2) { return ErrorAbort(state, "%s() expects 2 args, got %d", name, argc); @@ -218,11 +219,11 @@ char* FormatFn(const char* name, State* state, int argc, Expr* argv[]) { done: free(type); if (result != location) free(location); - return result; + return StringValue(result); } -char* DeleteFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* DeleteFn(const char* name, State* state, int argc, Expr* argv[]) { char** paths = malloc(argc * sizeof(char*)); int i; for (i = 0; i < argc; ++i) { @@ -249,11 +250,11 @@ char* DeleteFn(const char* name, State* state, int argc, Expr* argv[]) { char buffer[10]; sprintf(buffer, "%d", success); - return strdup(buffer); + return StringValue(strdup(buffer)); } -char* ShowProgressFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* ShowProgressFn(const char* name, State* state, int argc, Expr* argv[]) { if (argc != 2) { return ErrorAbort(state, "%s() expects 2 args, got %d", name, argc); } @@ -270,10 +271,10 @@ char* ShowProgressFn(const char* name, State* state, int argc, Expr* argv[]) { fprintf(ui->cmd_pipe, "progress %f %d\n", frac, sec); free(sec_str); - return frac_str; + return StringValue(frac_str); } -char* SetProgressFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* SetProgressFn(const char* name, State* state, int argc, Expr* argv[]) { if (argc != 1) { return ErrorAbort(state, "%s() expects 1 arg, got %d", name, argc); } @@ -287,11 +288,11 @@ char* SetProgressFn(const char* name, State* state, int argc, Expr* argv[]) { UpdaterInfo* ui = (UpdaterInfo*)(state->cookie); fprintf(ui->cmd_pipe, "set_progress %f\n", frac); - return frac_str; + return StringValue(frac_str); } // package_extract_dir(package_path, destination_path) -char* PackageExtractDirFn(const char* name, State* state, +Value* PackageExtractDirFn(const char* name, State* state, int argc, Expr* argv[]) { if (argc != 2) { return ErrorAbort(state, "%s() expects 2 args, got %d", name, argc); @@ -310,7 +311,7 @@ char* PackageExtractDirFn(const char* name, State* state, NULL, NULL); free(zip_path); free(dest_path); - return strdup(success ? "t" : ""); + return StringValue(strdup(success ? "t" : "")); } @@ -318,9 +319,8 @@ char* PackageExtractDirFn(const char* name, State* state, // or // package_extract_file(package_path) // to return the entire contents of the file as the result of this -// function (the char* returned points to a long giving the length -// followed by that many bytes of data). -char* PackageExtractFileFn(const char* name, State* state, +// function (the char* returned is actually a FileContents*). +Value* PackageExtractFileFn(const char* name, State* state, int argc, Expr* argv[]) { if (argc != 1 && argc != 2) { return ErrorAbort(state, "%s() expects 1 or 2 args, got %d", @@ -353,13 +353,16 @@ char* PackageExtractFileFn(const char* name, State* state, done2: free(zip_path); free(dest_path); - return strdup(success ? "t" : ""); + return StringValue(strdup(success ? "t" : "")); } else { // The one-argument version returns the contents of the file // as the result. char* zip_path; - char* buffer = NULL; + Value* v = malloc(sizeof(Value)); + v->type = VAL_BLOB; + v->size = -1; + v->data = NULL; if (ReadArgs(state, argv, 1, &zip_path) < 0) return NULL; @@ -370,33 +373,32 @@ char* PackageExtractFileFn(const char* name, State* state, goto done1; } - long size = mzGetZipEntryUncompLen(entry); - buffer = malloc(size + sizeof(long)); - if (buffer == NULL) { + v->size = mzGetZipEntryUncompLen(entry); + v->data = malloc(v->size); + if (v->data == NULL) { fprintf(stderr, "%s: failed to allocate %ld bytes for %s\n", - name, size+sizeof(long), zip_path); + name, (long)v->size, zip_path); goto done1; } - *(long *)buffer = size; - success = mzExtractZipEntryToBuffer( - za, entry, (unsigned char *)(buffer + sizeof(long))); + success = mzExtractZipEntryToBuffer(za, entry, + (unsigned char *)v->data); done1: free(zip_path); if (!success) { - free(buffer); - buffer = malloc(sizeof(long)); - *(long *)buffer = -1L; + free(v->data); + v->data = NULL; + v->size = -1; } - return buffer; + return v; } } // symlink target src1 src2 ... // unlinks any previously existing src1, src2, etc before creating symlinks. -char* SymlinkFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* SymlinkFn(const char* name, State* state, int argc, Expr* argv[]) { if (argc == 0) { return ErrorAbort(state, "%s() expects 1+ args, got %d", name, argc); } @@ -425,11 +427,11 @@ char* SymlinkFn(const char* name, State* state, int argc, Expr* argv[]) { free(srcs[i]); } free(srcs); - return strdup(""); + return StringValue(strdup("")); } -char* SetPermFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* SetPermFn(const char* name, State* state, int argc, Expr* argv[]) { char* result = NULL; bool recursive = (strcmp(name, "set_perm_recursive") == 0); @@ -499,11 +501,11 @@ done: } free(args); - return result; + return StringValue(result); } -char* GetPropFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* GetPropFn(const char* name, State* state, int argc, Expr* argv[]) { if (argc != 1) { return ErrorAbort(state, "%s() expects 1 arg, got %d", name, argc); } @@ -515,7 +517,7 @@ char* GetPropFn(const char* name, State* state, int argc, Expr* argv[]) { property_get(key, value, ""); free(key); - return strdup(value); + return StringValue(strdup(value)); } @@ -524,7 +526,7 @@ char* GetPropFn(const char* name, State* state, int argc, Expr* argv[]) { // interprets 'file' as a getprop-style file (key=value pairs, one // per line, # comment lines and blank lines okay), and returns the value // for 'key' (or "" if it isn't defined). -char* FileGetPropFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* FileGetPropFn(const char* name, State* state, int argc, Expr* argv[]) { char* result = NULL; char* buffer = NULL; char* filename; @@ -614,7 +616,7 @@ char* FileGetPropFn(const char* name, State* state, int argc, Expr* argv[]) { free(filename); free(key); free(buffer); - return result; + return StringValue(result); } @@ -627,7 +629,7 @@ static bool write_raw_image_cb(const unsigned char* data, } // write_raw_image(file, partition) -char* WriteRawImageFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* WriteRawImageFn(const char* name, State* state, int argc, Expr* argv[]) { char* result = NULL; char* partition; @@ -700,15 +702,13 @@ char* WriteRawImageFn(const char* name, State* state, int argc, Expr* argv[]) { done: if (result != partition) free(partition); free(filename); - return result; + return StringValue(result); } -extern int applypatch(int argc, char** argv); - // apply_patch(srcfile, tgtfile, tgtsha1, tgtsize, sha1:patch, ...) // apply_patch_check(file, sha1, ...) // apply_patch_space(bytes) -char* ApplyPatchFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* ApplyPatchFn(const char* name, State* state, int argc, Expr* argv[]) { printf("in applypatchfn (%s)\n", name); char* prepend = NULL; @@ -747,13 +747,13 @@ char* ApplyPatchFn(const char* name, State* state, int argc, Expr* argv[]) { free(args); switch (result) { - case 0: return strdup("t"); - case 1: return strdup(""); + case 0: return StringValue(strdup("t")); + case 1: return StringValue(strdup("")); default: return ErrorAbort(state, "applypatch couldn't parse args"); } } -char* UIPrintFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* UIPrintFn(const char* name, State* state, int argc, Expr* argv[]) { char** args = ReadVarArgs(state, argc, argv); if (args == NULL) { return NULL; @@ -782,10 +782,10 @@ char* UIPrintFn(const char* name, State* state, int argc, Expr* argv[]) { } fprintf(((UpdaterInfo*)(state->cookie))->cmd_pipe, "ui_print\n"); - return buffer; + return StringValue(buffer); } -char* RunProgramFn(const char* name, State* state, int argc, Expr* argv[]) { +Value* RunProgramFn(const char* name, State* state, int argc, Expr* argv[]) { if (argc < 1) { return ErrorAbort(state, "%s() expects at least 1 arg", name); } @@ -828,9 +828,138 @@ char* RunProgramFn(const char* name, State* state, int argc, Expr* argv[]) { char buffer[20]; sprintf(buffer, "%d", status); - return strdup(buffer); + return StringValue(strdup(buffer)); } +// Take a string 'str' of 40 hex digits and parse it into the 20 +// byte array 'digest'. 'str' may contain only the digest or be of +// the form "<digest>:<anything>". Return 0 on success, -1 on any +// error. +static int ParseSha1(const char* str, uint8_t* digest) { + int i; + const char* ps = str; + uint8_t* pd = digest; + for (i = 0; i < SHA_DIGEST_SIZE * 2; ++i, ++ps) { + int digit; + if (*ps >= '0' && *ps <= '9') { + digit = *ps - '0'; + } else if (*ps >= 'a' && *ps <= 'f') { + digit = *ps - 'a' + 10; + } else if (*ps >= 'A' && *ps <= 'F') { + digit = *ps - 'A' + 10; + } else { + return -1; + } + if (i % 2 == 0) { + *pd = digit << 4; + } else { + *pd |= digit; + ++pd; + } + } + if (*ps != '\0') return -1; + return 0; +} + +// Take a sha-1 digest and return it as a newly-allocated hex string. +static char* PrintSha1(uint8_t* digest) { + char* buffer = malloc(SHA_DIGEST_SIZE*2 + 1); + int i; + const char* alphabet = "0123456789abcdef"; + for (i = 0; i < SHA_DIGEST_SIZE; ++i) { + buffer[i*2] = alphabet[(digest[i] >> 4) & 0xf]; + buffer[i*2+1] = alphabet[digest[i] & 0xf]; + } + buffer[i*2] = '\0'; + return buffer; +} + +// sha1_check(data) +// to return the sha1 of the data (given in the format returned by +// read_file). +// +// sha1_check(data, sha1_hex, [sha1_hex, ...]) +// returns the sha1 of the file if it matches any of the hex +// strings passed, or "" if it does not equal any of them. +// +Value* Sha1CheckFn(const char* name, State* state, int argc, Expr* argv[]) { + if (argc < 1) { + return ErrorAbort(state, "%s() expects at least 1 arg", name); + } + + Value** args = ReadValueVarArgs(state, argc, argv); + if (args == NULL) { + return NULL; + } + + if (args[0]->size < 0) { + fprintf(stderr, "%s(): no file contents received", name); + return StringValue(strdup("")); + } + uint8_t digest[SHA_DIGEST_SIZE]; + SHA(args[0]->data, args[0]->size, digest); + FreeValue(args[0]); + + if (argc == 1) { + return StringValue(PrintSha1(digest)); + } + + int i; + uint8_t* arg_digest = malloc(SHA_DIGEST_SIZE); + for (i = 1; i < argc; ++i) { + if (args[i]->type != VAL_STRING) { + fprintf(stderr, "%s(): arg %d is not a string; skipping", + name, i); + } else if (ParseSha1(args[i]->data, arg_digest) != 0) { + // Warn about bad args and skip them. + fprintf(stderr, "%s(): error parsing \"%s\" as sha-1; skipping", + name, args[i]->data); + } else if (memcmp(digest, arg_digest, SHA_DIGEST_SIZE) == 0) { + break; + } + FreeValue(args[i]); + } + if (i >= argc) { + // Didn't match any of the hex strings; return false. + return StringValue(strdup("")); + } + // Found a match; free all the remaining arguments and return the + // matched one. + int j; + for (j = i+1; j < argc; ++j) { + FreeValue(args[j]); + } + return args[i]; +} + +// Read a local file and return its contents (the char* returned +// is actually a FileContents*). +Value* ReadFileFn(const char* name, State* state, int argc, Expr* argv[]) { + if (argc != 1) { + return ErrorAbort(state, "%s() expects 1 arg, got %d", name, argc); + } + char* filename; + if (ReadArgs(state, argv, 1, &filename) < 0) return NULL; + + Value* v = malloc(sizeof(Value)); + v->type = VAL_BLOB; + + FileContents fc; + if (LoadFileContents(filename, &fc) != 0) { + ErrorAbort(state, "%s() loading \"%s\" failed: %s", + name, filename, strerror(errno)); + free(filename); + free(v); + free(fc.data); + return NULL; + } + + v->size = fc.size; + v->data = (char*)fc.data; + + free(filename); + return v; +} void RegisterInstallFunctions() { RegisterFunction("mount", MountFn); @@ -855,6 +984,9 @@ void RegisterInstallFunctions() { RegisterFunction("apply_patch_check", ApplyPatchFn); RegisterFunction("apply_patch_space", ApplyPatchFn); + RegisterFunction("read_file", ReadFileFn); + RegisterFunction("sha1_check", Sha1CheckFn); + RegisterFunction("ui_print", UIPrintFn); RegisterFunction("run_program", RunProgramFn); diff --git a/updater/updater.c b/updater/updater.c index 2d16deeba..6537a94ba 100644 --- a/updater/updater.c +++ b/updater/updater.c @@ -33,6 +33,12 @@ #define SCRIPT_NAME "META-INF/com/google/android/updater-script" int main(int argc, char** argv) { + // Various things log information to stdout or stderr more or less + // at random. The log file makes more sense if buffering is + // turned off so things appear in the right order. + setbuf(stdout, NULL); + setbuf(stderr, NULL); + if (argc != 4) { fprintf(stderr, "unexpected number of arguments (%d)\n", argc); return 1; |