mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-11-25 02:35:22 +00:00
e178fd9e34
BUG=670 TEST=RSA verification test using the convenience function is passes. Review URL: http://codereview.chromium.org/575019
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*
|
|
* Utility functions for message digest functions.
|
|
*/
|
|
|
|
#include "padding.h"
|
|
#include "rsa_utility.h"
|
|
#include "utility.h"
|
|
|
|
int RSAProcessedKeySize(int algorithm) {
|
|
int key_len = siglen_map[algorithm] * sizeof(uint32_t); /* Key length in
|
|
* bytes. */
|
|
/* Total size needed by a RSAPublicKey structure is =
|
|
* 2 * key_len bytes for the n and rr arrays
|
|
* + sizeof len + sizeof n0inv.
|
|
*/
|
|
return (2 * key_len + sizeof(int) + sizeof(uint32_t));
|
|
}
|
|
|
|
RSAPublicKey* RSAPublicKeyFromBuf(uint8_t* buf, int len) {
|
|
RSAPublicKey* key = (RSAPublicKey*) Malloc(sizeof(RSAPublicKey));
|
|
MemcpyState st;
|
|
int key_len;
|
|
|
|
st.remaining_buf = buf;
|
|
st.remaining_len = len;
|
|
|
|
StatefulMemcpy(&st, &key->len, sizeof(key->len));
|
|
key_len = key->len * sizeof(uint32_t); /* key length in bytes. */
|
|
key->n = (uint32_t*) Malloc(key_len);
|
|
key->rr = (uint32_t*) Malloc(key_len);
|
|
|
|
StatefulMemcpy(&st, &key->n0inv, sizeof(key->n0inv));
|
|
StatefulMemcpy(&st, key->n, key_len);
|
|
StatefulMemcpy(&st, key->rr, key_len);
|
|
if (st.remaining_len != 0) { /* Underrun or overrun. */
|
|
Free(key->n);
|
|
Free(key->rr);
|
|
Free(key);
|
|
return NULL;
|
|
}
|
|
|
|
return key;
|
|
}
|