1 files changed, 0 insertions, 361 deletions

diff --git a/verifier.c b/verifier.c
deleted file mode 100644
index 1180ae8d0..000000000
--- a/verifier.c
+++ /dev/null
@@ -1,361 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "common.h"
-#include "verifier.h"
-
-#include "minzip/Zip.h"
-#include "mincrypt/rsa.h"
-#include "mincrypt/sha.h"
-
-#include <netinet/in.h>  /* required for resolv.h */
-#include <resolv.h>      /* for base64 codec */
-#include <string.h>
-
-/* Return an allocated buffer with the contents of a zip file entry. */
-static char *slurpEntry(const ZipArchive *pArchive, const ZipEntry *pEntry) {
-    if (!mzIsZipEntryIntact(pArchive, pEntry)) {
-        UnterminatedString fn = mzGetZipEntryFileName(pEntry);
-        LOGE("Invalid %.*s\n", fn.len, fn.str);
-        return NULL;
-    }
-
-    int len = mzGetZipEntryUncompLen(pEntry);
-    char *buf = malloc(len + 1);
-    if (buf == NULL) {
-        UnterminatedString fn = mzGetZipEntryFileName(pEntry);
-        LOGE("Can't allocate %d bytes for %.*s\n", len, fn.len, fn.str);
-        return NULL;
-    }
-
-    if (!mzReadZipEntry(pArchive, pEntry, buf, len)) {
-        UnterminatedString fn = mzGetZipEntryFileName(pEntry);
-        LOGE("Can't read %.*s\n", fn.len, fn.str);
-        free(buf);
-        return NULL;
-    }
-
-    buf[len] = '\0';
-    return buf;
-}
-
-
-struct DigestContext {
-    SHA_CTX digest;
-    unsigned *doneBytes;
-    unsigned totalBytes;
-};
-
-
-/* mzProcessZipEntryContents callback to update an SHA-1 hash context. */
-static bool updateHash(const unsigned char *data, int dataLen, void *cookie) {
-    struct DigestContext *context = (struct DigestContext *) cookie;
-    SHA_update(&context->digest, data, dataLen);
-    if (context->doneBytes != NULL) {
-        *context->doneBytes += dataLen;
-        if (context->totalBytes > 0) {
-            ui_set_progress(*context->doneBytes * 1.0 / context->totalBytes);
-        }
-    }
-    return true;
-}
-
-
-/* Get the SHA-1 digest of a zip file entry. */
-static bool digestEntry(const ZipArchive *pArchive, const ZipEntry *pEntry,
-        unsigned *doneBytes, unsigned totalBytes,
-        uint8_t digest[SHA_DIGEST_SIZE]) {
-    struct DigestContext context;
-    SHA_init(&context.digest);
-    context.doneBytes = doneBytes;
-    context.totalBytes = totalBytes;
-    if (!mzProcessZipEntryContents(pArchive, pEntry, updateHash, &context)) {
-        UnterminatedString fn = mzGetZipEntryFileName(pEntry);
-        LOGE("Can't digest %.*s\n", fn.len, fn.str);
-        return false;
-    }
-
-    memcpy(digest, SHA_final(&context.digest), SHA_DIGEST_SIZE);
-
-#ifdef LOG_VERBOSE
-    UnterminatedString fn = mzGetZipEntryFileName(pEntry);
-    char base64[SHA_DIGEST_SIZE * 3];
-    b64_ntop(digest, SHA_DIGEST_SIZE, base64, sizeof(base64));
-    LOGV("sha1(%.*s) = %s\n", fn.len, fn.str, base64);
-#endif
-
-    return true;
-}
-
-
-/* Find a /META-INF/xxx.SF signature file signed by a matching xxx.RSA file. */
-static const ZipEntry *verifySignature(const ZipArchive *pArchive,
-        const RSAPublicKey *pKeys, unsigned int numKeys) {
-    static const char prefix[] = "META-INF/";
-    static const char rsa[] = ".RSA", sf[] = ".SF";
-
-    unsigned int i, j;
-    for (i = 0; i < mzZipEntryCount(pArchive); ++i) {
-        const ZipEntry *rsaEntry = mzGetZipEntryAt(pArchive, i);
-        UnterminatedString rsaName = mzGetZipEntryFileName(rsaEntry);
-        int rsaLen = mzGetZipEntryUncompLen(rsaEntry);
-        if (rsaLen >= RSANUMBYTES && rsaName.len > sizeof(prefix) &&
-                !strncmp(rsaName.str, prefix, sizeof(prefix) - 1) &&
-                !strncmp(rsaName.str + rsaName.len - sizeof(rsa) + 1,
-                         rsa, sizeof(rsa) - 1)) {
-            char *sfName = malloc(rsaName.len - sizeof(rsa) + sizeof(sf) + 1);
-            if (sfName == NULL) {
-                LOGE("Can't allocate %d bytes for filename\n", rsaName.len);
-                continue;
-            }
-
-            /* Replace .RSA with .SF */
-            strncpy(sfName, rsaName.str, rsaName.len - sizeof(rsa) + 1);
-            strcpy(sfName + rsaName.len - sizeof(rsa) + 1, sf);
-            const ZipEntry *sfEntry = mzFindZipEntry(pArchive, sfName);
-
-            if (sfEntry == NULL) {
-                LOGW("Missing signature file %s\n", sfName);
-                free(sfName);
-                continue;
-            }
-
-            free(sfName);
-
-            uint8_t sfDigest[SHA_DIGEST_SIZE];
-            if (!digestEntry(pArchive, sfEntry, NULL, 0, sfDigest)) continue;
-
-            char *rsaBuf = slurpEntry(pArchive, rsaEntry);
-            if (rsaBuf == NULL) continue;
-
-            /* Try to verify the signature with all the keys. */
-            uint8_t *sig = (uint8_t *) rsaBuf + rsaLen - RSANUMBYTES;
-            for (j = 0; j < numKeys; ++j) {
-                if (RSA_verify(&pKeys[j], sig, RSANUMBYTES, sfDigest)) {
-                    free(rsaBuf);
-                    LOGI("Verified %.*s\n", rsaName.len, rsaName.str);
-                    return sfEntry;
-                }
-            }
-
-            free(rsaBuf);
-            LOGW("Can't verify %.*s\n", rsaName.len, rsaName.str);
-        }
-    }
-
-    LOGE("No signature (%d files)\n", mzZipEntryCount(pArchive));
-    return NULL;
-}
-
-
-/* Verify /META-INF/MANIFEST.MF against the digest in a signature file. */
-static const ZipEntry *verifyManifest(const ZipArchive *pArchive,
-        const ZipEntry *sfEntry) {
-    static const char prefix[] = "SHA1-Digest-Manifest: ", eol[] = "\r\n";
-    uint8_t expected[SHA_DIGEST_SIZE + 3], actual[SHA_DIGEST_SIZE];
-
-    char *sfBuf = slurpEntry(pArchive, sfEntry);
-    if (sfBuf == NULL) return NULL;
-
-    char *line, *save;
-    for (line = strtok_r(sfBuf, eol, &save); line != NULL;
-         line = strtok_r(NULL, eol, &save)) {
-        if (!strncasecmp(prefix, line, sizeof(prefix) - 1)) {
-            UnterminatedString fn = mzGetZipEntryFileName(sfEntry);
-            const char *digest = line + sizeof(prefix) - 1;
-            int n = b64_pton(digest, expected, sizeof(expected));
-            if (n != SHA_DIGEST_SIZE) {
-                LOGE("Invalid base64 in %.*s: %s (%d)\n",
-                        fn.len, fn.str, digest, n);
-                line = NULL;
-            }
-            break;
-        }
-    }
-
-    free(sfBuf);
-
-    if (line == NULL) {
-        LOGE("No digest manifest in signature file\n");
-        return false;
-    }
-
-    const char *mfName = "META-INF/MANIFEST.MF";
-    const ZipEntry *mfEntry = mzFindZipEntry(pArchive, mfName);
-    if (mfEntry == NULL) {
-        LOGE("No manifest file %s\n", mfName);
-        return NULL;
-    }
-
-    if (!digestEntry(pArchive, mfEntry, NULL, 0, actual)) return NULL;
-    if (memcmp(expected, actual, SHA_DIGEST_SIZE)) {
-        UnterminatedString fn = mzGetZipEntryFileName(sfEntry);
-        LOGE("Wrong digest for %s in %.*s\n", mfName, fn.len, fn.str);
-        return NULL;
-    }
-
-    LOGI("Verified %s\n", mfName);
-    return mfEntry;
-}
-
-
-/* Verify all the files in a Zip archive against the manifest. */
-static bool verifyArchive(const ZipArchive *pArchive, const ZipEntry *mfEntry) {
-    static const char namePrefix[] = "Name: ";
-    static const char contPrefix[] = " ";  // Continuation of the filename
-    static const char digestPrefix[] = "SHA1-Digest: ";
-    static const char eol[] = "\r\n";
-
-    char *mfBuf = slurpEntry(pArchive, mfEntry);
-    if (mfBuf == NULL) return false;
-
-    /* we're using calloc() here, so the initial state of the array is false */
-    bool *unverified = (bool *) calloc(mzZipEntryCount(pArchive), sizeof(bool));
-    if (unverified == NULL) {
-        LOGE("Can't allocate valid flags\n");
-        free(mfBuf);
-        return false;
-    }
-
-    /* Mark all the files in the archive that need to be verified.
-     * As we scan the manifest and check signatures, we'll unset these flags.
-     * At the end, we'll make sure that all the flags are unset.
-     */
-
-    unsigned i, totalBytes = 0;
-    for (i = 0; i < mzZipEntryCount(pArchive); ++i) {
-        const ZipEntry *entry = mzGetZipEntryAt(pArchive, i);
-        UnterminatedString fn = mzGetZipEntryFileName(entry);
-        int len = mzGetZipEntryUncompLen(entry);
-
-        // Don't validate: directories, the manifest, *.RSA, and *.SF.
-
-        if (entry == mfEntry) {
-            LOGV("Skipping manifest %.*s\n", fn.len, fn.str);
-        } else if (fn.len > 0 && fn.str[fn.len-1] == '/' && len == 0) {
-            LOGV("Skipping directory %.*s\n", fn.len, fn.str);
-        } else if (!strncasecmp(fn.str, "META-INF/", 9) && (
-                !strncasecmp(fn.str + fn.len - 4, ".RSA", 4) ||
-                !strncasecmp(fn.str + fn.len - 3, ".SF", 3))) {
-            LOGV("Skipping signature %.*s\n", fn.len, fn.str);
-        } else {
-            unverified[i] = true;
-            totalBytes += len;
-        }
-    }
-
-    unsigned doneBytes = 0;
-    char *line, *save, *name = NULL;
-    for (line = strtok_r(mfBuf, eol, &save); line != NULL;
-         line = strtok_r(NULL, eol, &save)) {
-        if (!strncasecmp(line, namePrefix, sizeof(namePrefix) - 1)) {
-            // "Name:" introducing a new stanza
-            if (name != NULL) {
-                LOGE("No digest:\n  %s\n", name);
-                break;
-            }
-
-            name = strdup(line + sizeof(namePrefix) - 1);
-            if (name == NULL) {
-                LOGE("Can't copy filename in %s\n", line);
-                break;
-            }
-        } else if (!strncasecmp(line, contPrefix, sizeof(contPrefix) - 1)) {
-            // Continuing a long name (nothing else should be continued)
-            const char *tail = line + sizeof(contPrefix) - 1;
-            if (name == NULL) {
-                LOGE("Unexpected continuation:\n  %s\n", tail);
-            }
-
-            char *concat;
-            if (asprintf(&concat, "%s%s", name, tail) < 0) {
-                LOGE("Can't append continuation %s\n", tail);
-                break;
-            }
-            free(name);
-            name = concat;
-        } else if (!strncasecmp(line, digestPrefix, sizeof(digestPrefix) - 1)) {
-            // "Digest:" supplying a hash code for the current stanza
-            const char *base64 = line + sizeof(digestPrefix) - 1;
-            if (name == NULL) {
-                LOGE("Unexpected digest:\n  %s\n", base64);
-                break;
-            }
-
-            const ZipEntry *entry = mzFindZipEntry(pArchive, name);
-            if (entry == NULL) {
-                LOGE("Missing file:\n  %s\n", name);
-                break;
-            }
-            if (!mzIsZipEntryIntact(pArchive, entry)) {
-                LOGE("Corrupt file:\n  %s\n", name);
-                break;
-            }
-            if (!unverified[mzGetZipEntryIndex(pArchive, entry)]) {
-                LOGE("Unexpected file:\n  %s\n", name);
-                break;
-            }
-
-            uint8_t expected[SHA_DIGEST_SIZE + 3], actual[SHA_DIGEST_SIZE];
-            int n = b64_pton(base64, expected, sizeof(expected));
-            if (n != SHA_DIGEST_SIZE) {
-                LOGE("Invalid base64:\n  %s\n  %s\n", name, base64);
-                break;
-            }
-
-            if (!digestEntry(pArchive, entry, &doneBytes, totalBytes, actual) ||
-                memcmp(expected, actual, SHA_DIGEST_SIZE) != 0) {
-                LOGE("Wrong digest:\n  %s\n", name);
-                break;
-            }
-
-            LOGI("Verified %s\n", name);
-            unverified[mzGetZipEntryIndex(pArchive, entry)] = false;
-            free(name);
-            name = NULL;
-        }
-    }
-
-    if (name != NULL) free(name);
-    free(mfBuf);
-
-    for (i = 0; i < mzZipEntryCount(pArchive) && !unverified[i]; ++i) ;
-    free(unverified);
-
-    // This means we didn't get to the end of the manifest successfully.
-    if (line != NULL) return false;
-
-    if (i < mzZipEntryCount(pArchive)) {
-        const ZipEntry *entry = mzGetZipEntryAt(pArchive, i);
-        UnterminatedString fn = mzGetZipEntryFileName(entry);
-        LOGE("No digest for %.*s\n", fn.len, fn.str);
-        return false;
-    }
-
-    return true;
-}
-
-
-bool verify_jar_signature(const ZipArchive *pArchive,
-        const RSAPublicKey *pKeys, int numKeys) {
-    const ZipEntry *sfEntry = verifySignature(pArchive, pKeys, numKeys);
-    if (sfEntry == NULL) return false;
-
-    const ZipEntry *mfEntry = verifyManifest(pArchive, sfEntry);
-    if (mfEntry == NULL) return false;
-
-    return verifyArchive(pArchive, mfEntry);
-}