Reorder client src directories

client/src/crypto/asn1utils.c

@@ -0,0 +1,91 @@
+//-----------------------------------------------------------------------------
+// Copyright (C) 2018 Merlok
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// asn.1 utils
+//-----------------------------------------------------------------------------
+
+#include "asn1utils.h"
+#include <ctype.h>
+#include <stdlib.h>
+#include <mbedtls/asn1.h>
+
+#include "ui.h"  // Print...
+
+#include "emv/tlv.h"
+#include "emv/dump.h"
+#include "asn1dump.h"
+#include "util.h"
+
+int ecdsa_asn1_get_signature(uint8_t *signature, size_t signaturelen, uint8_t *rval, uint8_t *sval) {
+    if (!signature || !signaturelen || !rval || !sval)
+        return 1;
+
+    int res = 0;
+    unsigned char *p = signature;
+    const unsigned char *end = p + signaturelen;
+    size_t len;
+    mbedtls_mpi xmpi;
+
+    if ((res = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) == 0) {
+        mbedtls_mpi_init(&xmpi);
+        res = mbedtls_asn1_get_mpi(&p, end, &xmpi);
+        if (res) {
+            mbedtls_mpi_free(&xmpi);
+            goto exit;
+        }
+
+        res = mbedtls_mpi_write_binary(&xmpi, rval, 32);
+        mbedtls_mpi_free(&xmpi);
+        if (res)
+            goto exit;
+
+        mbedtls_mpi_init(&xmpi);
+        res = mbedtls_asn1_get_mpi(&p, end, &xmpi);
+        if (res) {
+            mbedtls_mpi_free(&xmpi);
+            goto exit;
+        }
+
+        res = mbedtls_mpi_write_binary(&xmpi, sval, 32);
+        mbedtls_mpi_free(&xmpi);
+        if (res)
+            goto exit;
+
+        // check size
+        if (end != p)
+            return 2;
+    }
+
+exit:
+    return res;
+}
+
+static bool print_cb(void *data, const struct tlv *tlv, int level, bool is_leaf) {
+    bool candump = true;
+    asn1_tag_dump(tlv, stdout, level, &candump);
+    if (is_leaf && candump) {
+        dump_buffer(tlv->value, tlv->len, stdout, level);
+    }
+
+    return true;
+}
+
+int asn1_print(uint8_t *asn1buf, size_t asn1buflen, const char *indent) {
+
+    struct tlvdb *t = tlvdb_parse_multi(asn1buf, asn1buflen);
+    if (t) {
+        tlvdb_visit(t, print_cb, NULL, 0);
+        tlvdb_free(t);
+    } else {
+        PrintAndLogEx(ERR, "Can't parse data as TLV tree.");
+        return 1;
+    }
+
+    return 0;
+}
+
+