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-rw-r--r--install.cpp100
-rw-r--r--verifier.cpp102
-rw-r--r--verifier.h2
-rw-r--r--verifier_test.cpp11
4 files changed, 112 insertions, 103 deletions
diff --git a/install.cpp b/install.cpp
index b8f478130..0f3298f1d 100644
--- a/install.cpp
+++ b/install.cpp
@@ -174,106 +174,6 @@ try_update_binary(const char *path, ZipArchive *zip, int* wipe_cache) {
return INSTALL_SUCCESS;
}
-// 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.
-//
-// Returns NULL if the file failed to parse, or if it contain zero keys.
-static RSAPublicKey*
-load_keys(const char* filename, int* numKeys) {
- RSAPublicKey* 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 = (RSAPublicKey*)realloc(out, *numKeys * sizeof(RSAPublicKey));
- RSAPublicKey* key = out + (*numKeys - 1);
-
- char start_char;
- if (fscanf(f, " %c", &start_char) != 1) goto exit;
- if (start_char == '{') {
- // a version 1 key has no version specifier.
- key->exponent = 3;
- } else if (start_char == 'v') {
- int version;
- if (fscanf(f, "%d {", &version) != 1) goto exit;
- if (version == 2) {
- key->exponent = 65537;
- } else {
- goto exit;
- }
- }
-
- 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, " } } ");
-
- // 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;
- }
-
- LOGI("read key e=%d\n", key->exponent);
- }
- }
-
- fclose(f);
- return out;
-
-exit:
- if (f) fclose(f);
- free(out);
- *numKeys = 0;
- return NULL;
-}
-
static int
really_install_package(const char *path, int* wipe_cache)
{
diff --git a/verifier.cpp b/verifier.cpp
index 1c5a41d1b..5f4c981e5 100644
--- a/verifier.cpp
+++ b/verifier.cpp
@@ -179,9 +179,111 @@ int verify_file(const char* path, const RSAPublicKey *pKeys, unsigned int numKey
LOGI("whole-file signature verified against key %d\n", i);
free(eocd);
return VERIFY_SUCCESS;
+ } else {
+ LOGI("failed to verify against key %d\n", i);
}
}
free(eocd);
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.
+//
+// Returns NULL if the file failed to parse, or if it contain zero keys.
+RSAPublicKey*
+load_keys(const char* filename, int* numKeys) {
+ RSAPublicKey* 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 = (RSAPublicKey*)realloc(out, *numKeys * sizeof(RSAPublicKey));
+ RSAPublicKey* key = out + (*numKeys - 1);
+
+ char start_char;
+ if (fscanf(f, " %c", &start_char) != 1) goto exit;
+ if (start_char == '{') {
+ // a version 1 key has no version specifier.
+ key->exponent = 3;
+ } else if (start_char == 'v') {
+ int version;
+ if (fscanf(f, "%d {", &version) != 1) goto exit;
+ if (version == 2) {
+ key->exponent = 65537;
+ } else {
+ goto exit;
+ }
+ }
+
+ 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, " } } ");
+
+ // 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;
+ }
+
+ LOGI("read key e=%d\n", key->exponent);
+ }
+ }
+
+ fclose(f);
+ return out;
+
+exit:
+ if (f) fclose(f);
+ free(out);
+ *numKeys = 0;
+ return NULL;
+}
diff --git a/verifier.h b/verifier.h
index 1bdfca6dd..e9ef3b722 100644
--- a/verifier.h
+++ b/verifier.h
@@ -24,6 +24,8 @@
*/
int verify_file(const char* path, const RSAPublicKey *pKeys, unsigned int numKeys);
+RSAPublicKey* load_keys(const char* filename, int* numKeys);
+
#define VERIFY_SUCCESS 0
#define VERIFY_FAILURE 1
diff --git a/verifier_test.cpp b/verifier_test.cpp
index 01d092680..79c55783d 100644
--- a/verifier_test.cpp
+++ b/verifier_test.cpp
@@ -129,21 +129,26 @@ class FakeUI : public RecoveryUI {
};
int main(int argc, char **argv) {
- if (argc != 2 && argc != 3) {
- fprintf(stderr, "Usage: %s [-f4] <package>\n", argv[0]);
+ if (argc < 2 || argc > 4) {
+ fprintf(stderr, "Usage: %s [-f4 | -file <keys>] <package>\n", argv[0]);
return 2;
}
RSAPublicKey* key = &test_key;
+ int num_keys = 1;
++argv;
if (strcmp(argv[0], "-f4") == 0) {
++argv;
key = &test_f4_key;
+ } else if (strcmp(argv[0], "-file") == 0) {
+ ++argv;
+ key = load_keys(argv[0], &num_keys);
+ ++argv;
}
ui = new FakeUI();
- int result = verify_file(*argv, key, 1);
+ int result = verify_file(*argv, key, num_keys);
if (result == VERIFY_SUCCESS) {
printf("SUCCESS\n");
return 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 12:50:06 +0100