1 files changed, 0 insertions, 471 deletions

diff --git a/oldverifier/verifier.cpp b/oldverifier/verifier.cpp
deleted file mode 100644
index 98c733732..000000000
--- a/oldverifier/verifier.cpp
+++ /dev/null
@@ -1,471 +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 "asn1_decoder.h"
-#include "common.h"
-#include "ui.h"
-#include "verifier.h"
-
-#include "mincrypt/dsa_sig.h"
-#include "mincrypt/p256.h"
-#include "mincrypt/p256_ecdsa.h"
-#include "mincrypt/rsa.h"
-#include "mincrypt/sha.h"
-#include "mincrypt/sha256.h"
-
-#include <errno.h>
-#include <malloc.h>
-#include <stdio.h>
-#include <string.h>
-
-//extern RecoveryUI* ui;
-
-#define PUBLIC_KEYS_FILE "/res/keys"
-
-/*
- * Simple version of PKCS#7 SignedData extraction. This extracts the
- * signature OCTET STRING to be used for signature verification.
- *
- * For full details, see http://www.ietf.org/rfc/rfc3852.txt
- *
- * The PKCS#7 structure looks like:
- *
- *   SEQUENCE (ContentInfo)
- *     OID (ContentType)
- *     [0] (content)
- *       SEQUENCE (SignedData)
- *         INTEGER (version CMSVersion)
- *         SET (DigestAlgorithmIdentifiers)
- *         SEQUENCE (EncapsulatedContentInfo)
- *         [0] (CertificateSet OPTIONAL)
- *         [1] (RevocationInfoChoices OPTIONAL)
- *         SET (SignerInfos)
- *           SEQUENCE (SignerInfo)
- *             INTEGER (CMSVersion)
- *             SEQUENCE (SignerIdentifier)
- *             SEQUENCE (DigestAlgorithmIdentifier)
- *             SEQUENCE (SignatureAlgorithmIdentifier)
- *             OCTET STRING (SignatureValue)
- */
-static bool read_pkcs7(uint8_t* pkcs7_der, size_t pkcs7_der_len, uint8_t** sig_der,
-        size_t* sig_der_length) {
-    asn1_context_t* ctx = asn1_context_new(pkcs7_der, pkcs7_der_len);
-    if (ctx == NULL) {
-        return false;
-    }
-
-    asn1_context_t* pkcs7_seq = asn1_sequence_get(ctx);
-    if (pkcs7_seq != NULL && asn1_sequence_next(pkcs7_seq)) {
-        asn1_context_t *signed_data_app = asn1_constructed_get(pkcs7_seq);
-        if (signed_data_app != NULL) {
-            asn1_context_t* signed_data_seq = asn1_sequence_get(signed_data_app);
-            if (signed_data_seq != NULL
-                    && asn1_sequence_next(signed_data_seq)
-                    && asn1_sequence_next(signed_data_seq)
-                    && asn1_sequence_next(signed_data_seq)
-                    && asn1_constructed_skip_all(signed_data_seq)) {
-                asn1_context_t *sig_set = asn1_set_get(signed_data_seq);
-                if (sig_set != NULL) {
-                    asn1_context_t* sig_seq = asn1_sequence_get(sig_set);
-                    if (sig_seq != NULL
-                            && asn1_sequence_next(sig_seq)
-                            && asn1_sequence_next(sig_seq)
-                            && asn1_sequence_next(sig_seq)
-                            && asn1_sequence_next(sig_seq)) {
-                        uint8_t* sig_der_ptr;
-                        if (asn1_octet_string_get(sig_seq, &sig_der_ptr, sig_der_length)) {
-                            *sig_der = (uint8_t*) malloc(*sig_der_length);
-                            if (*sig_der != NULL) {
-                                memcpy(*sig_der, sig_der_ptr, *sig_der_length);
-                            }
-                        }
-                        asn1_context_free(sig_seq);
-                    }
-                    asn1_context_free(sig_set);
-                }
-                asn1_context_free(signed_data_seq);
-            }
-            asn1_context_free(signed_data_app);
-        }
-        asn1_context_free(pkcs7_seq);
-    }
-    asn1_context_free(ctx);
-
-    return *sig_der != NULL;
-}
-
-// Look for an RSA signature embedded in the .ZIP file comment given
-// the path to the zip.  Verify it matches one of the given public
-// keys.
-//
-// Return VERIFY_SUCCESS, VERIFY_FAILURE (if any error is encountered
-// or no key matches the signature).
-int verify_file(unsigned char* addr, size_t length) {
-    //ui->SetProgress(0.0);
-
-    int numKeys;
-    Certificate* pKeys = load_keys(PUBLIC_KEYS_FILE, &numKeys);
-    if (pKeys == NULL) {
-        LOGE("Failed to load keys\n");
-        return INSTALL_CORRUPT;
-    }
-    LOGI("%d key(s) loaded from %s\n", numKeys, PUBLIC_KEYS_FILE);
-
-    // An archive with a whole-file signature will end in six bytes:
-    //
-    //   (2-byte signature start) $ff $ff (2-byte comment size)
-    //
-    // (As far as the ZIP format is concerned, these are part of the
-    // archive comment.)  We start by reading this footer, this tells
-    // us how far back from the end we have to start reading to find
-    // the whole comment.
-
-#define FOOTER_SIZE 6
-
-    if (length < FOOTER_SIZE) {
-        LOGE("not big enough to contain footer\n");
-        return VERIFY_FAILURE;
-    }
-
-    unsigned char* footer = addr + length - FOOTER_SIZE;
-
-    if (footer[2] != 0xff || footer[3] != 0xff) {
-        LOGE("footer is wrong\n");
-        return VERIFY_FAILURE;
-    }
-
-    size_t comment_size = footer[4] + (footer[5] << 8);
-    size_t signature_start = footer[0] + (footer[1] << 8);
-    LOGI("comment is %zu bytes; signature %zu bytes from end\n",
-         comment_size, signature_start);
-
-    if (signature_start <= FOOTER_SIZE) {
-        LOGE("Signature start is in the footer");
-        return VERIFY_FAILURE;
-    }
-
-#define EOCD_HEADER_SIZE 22
-
-    // The end-of-central-directory record is 22 bytes plus any
-    // comment length.
-    size_t eocd_size = comment_size + EOCD_HEADER_SIZE;
-
-    if (length < eocd_size) {
-        LOGE("not big enough to contain EOCD\n");
-        return VERIFY_FAILURE;
-    }
-
-    // Determine how much of the file is covered by the signature.
-    // This is everything except the signature data and length, which
-    // includes all of the EOCD except for the comment length field (2
-    // bytes) and the comment data.
-    size_t signed_len = length - eocd_size + EOCD_HEADER_SIZE - 2;
-
-    unsigned char* eocd = addr + length - eocd_size;
-
-    // If this is really is the EOCD record, it will begin with the
-    // magic number $50 $4b $05 $06.
-    if (eocd[0] != 0x50 || eocd[1] != 0x4b ||
-        eocd[2] != 0x05 || eocd[3] != 0x06) {
-        LOGE("signature length doesn't match EOCD marker\n");
-        return VERIFY_FAILURE;
-    }
-
-    size_t i;
-    for (i = 4; i < eocd_size-3; ++i) {
-        if (eocd[i  ] == 0x50 && eocd[i+1] == 0x4b &&
-            eocd[i+2] == 0x05 && eocd[i+3] == 0x06) {
-            // if the sequence $50 $4b $05 $06 appears anywhere after
-            // the real one, minzip will find the later (wrong) one,
-            // which could be exploitable.  Fail verification if
-            // this sequence occurs anywhere after the real one.
-            LOGE("EOCD marker occurs after start of EOCD\n");
-            return VERIFY_FAILURE;
-        }
-    }
-
-#define BUFFER_SIZE 4096
-
-    bool need_sha1 = false;
-    bool need_sha256 = false;
-    for (i = 0; i < numKeys; ++i) {
-        switch (pKeys[i].hash_len) {
-            case SHA_DIGEST_SIZE: need_sha1 = true; break;
-            case SHA256_DIGEST_SIZE: need_sha256 = true; break;
-        }
-    }
-
-    SHA_CTX sha1_ctx;
-    SHA256_CTX sha256_ctx;
-    SHA_init(&sha1_ctx);
-    SHA256_init(&sha256_ctx);
-
-    double frac = -1.0;
-    size_t so_far = 0;
-    while (so_far < signed_len) {
-        size_t size = signed_len - so_far;
-        if (size > BUFFER_SIZE) size = BUFFER_SIZE;
-
-        if (need_sha1) SHA_update(&sha1_ctx, addr + so_far, size);
-        if (need_sha256) SHA256_update(&sha256_ctx, addr + so_far, size);
-        so_far += size;
-
-        double f = so_far / (double)signed_len;
-        if (f > frac + 0.02 || size == so_far) {
-            //ui->SetProgress(f);
-            frac = f;
-        }
-    }
-
-    const uint8_t* sha1 = SHA_final(&sha1_ctx);
-    const uint8_t* sha256 = SHA256_final(&sha256_ctx);
-
-    uint8_t* sig_der = NULL;
-    size_t sig_der_length = 0;
-
-    size_t signature_size = signature_start - FOOTER_SIZE;
-    if (!read_pkcs7(eocd + eocd_size - signature_start, signature_size, &sig_der,
-            &sig_der_length)) {
-        LOGE("Could not find signature DER block\n");
-        return VERIFY_FAILURE;
-    }
-
-    /*
-     * Check to make sure at least one of the keys matches the signature. Since
-     * any key can match, we need to try each before determining a verification
-     * failure has happened.
-     */
-    for (i = 0; i < numKeys; ++i) {
-        const uint8_t* hash;
-        switch (pKeys[i].hash_len) {
-            case SHA_DIGEST_SIZE: hash = sha1; break;
-            case SHA256_DIGEST_SIZE: hash = sha256; break;
-            default: continue;
-        }
-
-        // The 6 bytes is the "(signature_start) $ff $ff (comment_size)" that
-        // the signing tool appends after the signature itself.
-        if (pKeys[i].key_type == Certificate::RSA) {
-            if (sig_der_length < RSANUMBYTES) {
-                // "signature" block isn't big enough to contain an RSA block.
-                LOGI("signature is too short for RSA key %zu\n", i);
-                continue;
-            }
-
-            if (!RSA_verify(pKeys[i].rsa, sig_der, RSANUMBYTES,
-                            hash, pKeys[i].hash_len)) {
-                LOGI("failed to verify against RSA key %zu\n", i);
-                continue;
-            }
-
-            LOGI("whole-file signature verified against RSA key %zu\n", i);
-            free(sig_der);
-            return VERIFY_SUCCESS;
-        } else if (pKeys[i].key_type == Certificate::EC
-                && pKeys[i].hash_len == SHA256_DIGEST_SIZE) {
-            p256_int r, s;
-            if (!dsa_sig_unpack(sig_der, sig_der_length, &r, &s)) {
-                LOGI("Not a DSA signature block for EC key %zu\n", i);
-                continue;
-            }
-
-            p256_int p256_hash;
-            p256_from_bin(hash, &p256_hash);
-            if (!p256_ecdsa_verify(&(pKeys[i].ec->x), &(pKeys[i].ec->y),
-                                   &p256_hash, &r, &s)) {
-                LOGI("failed to verify against EC key %zu\n", i);
-                continue;
-            }
-
-            LOGI("whole-file signature verified against EC key %zu\n", i);
-            free(sig_der);
-            return VERIFY_SUCCESS;
-        } else {
-            LOGI("Unknown key type %d\n", pKeys[i].key_type);
-        }
-		LOGI("i: %i, eocd_size: %i, RSANUMBYTES: %i\n", i, eocd_size, RSANUMBYTES);
-    }
-    free(sig_der);
-    LOGE("failed to verify whole-file signature\n");
-    return VERIFY_FAILURE;
-}
-
-// Reads a file containing one or more public keys as produced by
-// DumpPublicKey:  this is an RSAPublicKey struct as it would appear
-// as a C source literal, eg:
-//
-//  "{64,0xc926ad21,{1795090719,...,-695002876},{-857949815,...,1175080310}}"
-//
-// For key versions newer than the original 2048-bit e=3 keys
-// supported by Android, the string is preceded by a version
-// identifier, eg:
-//
-//  "v2 {64,0xc926ad21,{1795090719,...,-695002876},{-857949815,...,1175080310}}"
-//
-// (Note that the braces and commas in this example are actual
-// characters the parser expects to find in the file; the ellipses
-// indicate more numbers omitted from this example.)
-//
-// The file may contain multiple keys in this format, separated by
-// commas.  The last key must not be followed by a comma.
-//
-// A Certificate is a pair of an RSAPublicKey and a particular hash
-// (we support SHA-1 and SHA-256; we store the hash length to signify
-// which is being used).  The hash used is implied by the version number.
-//
-//       1: 2048-bit RSA key with e=3 and SHA-1 hash
-//       2: 2048-bit RSA key with e=65537 and SHA-1 hash
-//       3: 2048-bit RSA key with e=3 and SHA-256 hash
-//       4: 2048-bit RSA key with e=65537 and SHA-256 hash
-//       5: 256-bit EC key using the NIST P-256 curve parameters and SHA-256 hash
-//
-// Returns NULL if the file failed to parse, or if it contain zero keys.
-Certificate*
-load_keys(const char* filename, int* numKeys) {
-    Certificate* out = NULL;
-    *numKeys = 0;
-
-    FILE* f = fopen(filename, "r");
-    if (f == NULL) {
-        LOGE("opening %s: %s\n", filename, strerror(errno));
-        goto exit;
-    }
-
-    {
-        int i;
-        bool done = false;
-        while (!done) {
-            ++*numKeys;
-            out = (Certificate*)realloc(out, *numKeys * sizeof(Certificate));
-            Certificate* cert = out + (*numKeys - 1);
-            memset(cert, '\0', sizeof(Certificate));
-
-            char start_char;
-            if (fscanf(f, " %c", &start_char) != 1) goto exit;
-            if (start_char == '{') {
-                // a version 1 key has no version specifier.
-                cert->key_type = Certificate::RSA;
-                cert->rsa = (RSAPublicKey*)malloc(sizeof(RSAPublicKey));
-                cert->rsa->exponent = 3;
-                cert->hash_len = SHA_DIGEST_SIZE;
-            } else if (start_char == 'v') {
-                int version;
-                if (fscanf(f, "%d {", &version) != 1) goto exit;
-                switch (version) {
-                    case 2:
-                        cert->key_type = Certificate::RSA;
-                        cert->rsa = (RSAPublicKey*)malloc(sizeof(RSAPublicKey));
-                        cert->rsa->exponent = 65537;
-                        cert->hash_len = SHA_DIGEST_SIZE;
-                        break;
-                    case 3:
-                        cert->key_type = Certificate::RSA;
-                        cert->rsa = (RSAPublicKey*)malloc(sizeof(RSAPublicKey));
-                        cert->rsa->exponent = 3;
-                        cert->hash_len = SHA256_DIGEST_SIZE;
-                        break;
-                    case 4:
-                        cert->key_type = Certificate::RSA;
-                        cert->rsa = (RSAPublicKey*)malloc(sizeof(RSAPublicKey));
-                        cert->rsa->exponent = 65537;
-                        cert->hash_len = SHA256_DIGEST_SIZE;
-                        break;
-                    case 5:
-                        cert->key_type = Certificate::EC;
-                        cert->ec = (ECPublicKey*)calloc(1, sizeof(ECPublicKey));
-                        cert->hash_len = SHA256_DIGEST_SIZE;
-                        break;
-                    default:
-                        goto exit;
-                }
-            }
-
-            if (cert->key_type == Certificate::RSA) {
-                RSAPublicKey* key = cert->rsa;
-                if (fscanf(f, " %i , 0x%x , { %u",
-                           &(key->len), &(key->n0inv), &(key->n[0])) != 3) {
-                    goto exit;
-                }
-                if (key->len != RSANUMWORDS) {
-                    LOGE("key length (%d) does not match expected size\n", key->len);
-                    goto exit;
-                }
-                for (i = 1; i < key->len; ++i) {
-                    if (fscanf(f, " , %u", &(key->n[i])) != 1) goto exit;
-                }
-                if (fscanf(f, " } , { %u", &(key->rr[0])) != 1) goto exit;
-                for (i = 1; i < key->len; ++i) {
-                    if (fscanf(f, " , %u", &(key->rr[i])) != 1) goto exit;
-                }
-                fscanf(f, " } } ");
-
-                LOGI("read key e=%d hash=%d\n", key->exponent, cert->hash_len);
-            } else if (cert->key_type == Certificate::EC) {
-                ECPublicKey* key = cert->ec;
-                int key_len;
-                unsigned int byte;
-                uint8_t x_bytes[P256_NBYTES];
-                uint8_t y_bytes[P256_NBYTES];
-                if (fscanf(f, " %i , { %u", &key_len, &byte) != 2) goto exit;
-                if (key_len != P256_NBYTES) {
-                    LOGE("Key length (%d) does not match expected size %d\n", key_len, P256_NBYTES);
-                    goto exit;
-                }
-                x_bytes[P256_NBYTES - 1] = byte;
-                for (i = P256_NBYTES - 2; i >= 0; --i) {
-                    if (fscanf(f, " , %u", &byte) != 1) goto exit;
-                    x_bytes[i] = byte;
-                }
-                if (fscanf(f, " } , { %u", &byte) != 1) goto exit;
-                y_bytes[P256_NBYTES - 1] = byte;
-                for (i = P256_NBYTES - 2; i >= 0; --i) {
-                    if (fscanf(f, " , %u", &byte) != 1) goto exit;
-                    y_bytes[i] = byte;
-                }
-                fscanf(f, " } } ");
-                p256_from_bin(x_bytes, &key->x);
-                p256_from_bin(y_bytes, &key->y);
-            } else {
-                LOGE("Unknown key type %d\n", cert->key_type);
-                goto exit;
-            }
-
-            // if the line ends in a comma, this file has more keys.
-            switch (fgetc(f)) {
-            case ',':
-                // more keys to come.
-                break;
-
-            case EOF:
-                done = true;
-                break;
-
-            default:
-                LOGE("unexpected character between keys\n");
-                goto exit;
-            }
-        }
-    }
-
-    fclose(f);
-    return out;
-
-exit:
-    if (f) fclose(f);
-    free(out);
-    *numKeys = 0;
-    return NULL;
-}