X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;ds=sidebyside;f=rsa%2Frsa_pkcs15.c;fp=rsa%2Frsa_pkcs15.c;h=781c9badee0844baa14230d31b7cdba0786a0112;hb=3edc70ba3f2306ec503fb5e99858d28659dcac65;hp=0000000000000000000000000000000000000000;hpb=52867acc0c7f09a79efbbb738cef0c3f5a2abb04;p=arm-crypto-lib.git
diff --git a/rsa/rsa_pkcs15.c b/rsa/rsa_pkcs15.c
new file mode 100644
index 0000000..781c9ba
--- /dev/null
+++ b/rsa/rsa_pkcs15.c
@@ -0,0 +1,94 @@
+/* rsa_pkcs15.c */
+/*
+ This file is part of the ARM-Crypto-Lib.
+ Copyright (C) 2006-2011 Daniel Otte (daniel.otte@rub.de)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+*/
+
+#include
+#include
+#include
+#include "bigint.h"
+#include "rsa_basic.h"
+
+#include "bigint_io.h"
+#include "cli.h"
+
+#include "random_dummy.h"
+
+uint8_t rsa_encrypt_pkcs15(void* dest, uint16_t* out_length, const void* src,
+ uint16_t length_B, rsa_publickey_t* key, const void* pad){
+ int16_t pad_length;
+ bigint_t x;
+ pad_length = (bigint_get_first_set_bit(key->modulus) + 7) / 8 - length_B - 3;
+ if(pad_length<8){
+ cli_putstr("\r\nERROR: pad_length<8; pad_length: ");
+ cli_hexdump_rev(&pad_length, 2);
+ return 2; /* message to long */
+ }
+ if(!pad){
+ uint16_t i;
+ uint8_t c;
+ for(i=0; i=m_length){
+ return 1;
+ }
+ ++idx;
+ while(((uint8_t*)x.wordv)[idx+pad_length]!=0 && (idx+pad_length)=m_length){
+ return 2;
+ }
+ *out_length = m_length - idx - pad_length - 1;
+ memcpy(dest, ((uint8_t*)x.wordv) + idx + pad_length + 1, m_length - idx - pad_length - 1);
+ if(pad){
+ memcpy(pad, ((uint8_t*)x.wordv)+idx, pad_length);
+ }
+ return 0;
+}
+