Small RSA verification example
Sean Parkinson
parent
d54982ded7
commit
acd0595e1d
|
|
@ -101,6 +101,7 @@ signature/sigtest/opensigtest
|
|||
signature/firmware_sign/eccsign
|
||||
signature/rsa_buffer/sign
|
||||
signature/rsa_buffer/verify
|
||||
signature/rsa_vfy_only/verify
|
||||
|
||||
ecc/ecc-key-decode
|
||||
ecc/ecc-key-export
|
||||
|
|
|
|||
|
|
@ -0,0 +1,36 @@
|
|||
# RSA Examples Makefile
|
||||
CC = gcc
|
||||
LIB_PATH = /usr/local
|
||||
CFLAGS = -Wall -I$(LIB_PATH)/include
|
||||
LIBS = -L$(LIB_PATH)/lib -lm
|
||||
|
||||
# option variables
|
||||
DYN_LIB = -lwolfssl
|
||||
STATIC_LIB = $(LIB_PATH)/lib/libwolfssl.a
|
||||
DEBUG_FLAGS = -g -DDEBUG
|
||||
DEBUG_INC_PATHS = -MD
|
||||
OPTIMIZE = -Os
|
||||
|
||||
# Options
|
||||
#CFLAGS+=$(DEBUG_FLAGS)
|
||||
CFLAGS+=$(OPTIMIZE)
|
||||
LIBS+=$(STATIC_LIB)
|
||||
#LIBS+=$(DYN_LIB)
|
||||
|
||||
# build targets
|
||||
SRC=$(wildcard *.c)
|
||||
TARGETS=$(patsubst %.c, %, $(SRC))
|
||||
|
||||
.PHONY: clean all
|
||||
|
||||
all: $(TARGETS)
|
||||
|
||||
debug: CFLAGS+=$(DEBUG_FLAGS)
|
||||
debug: all
|
||||
|
||||
# build template
|
||||
%: %.c
|
||||
$(CC) -o $@ $< $(CFLAGS) $(LIBS)
|
||||
|
||||
clean:
|
||||
rm -f $(TARGETS)
|
||||
|
|
@ -0,0 +1,24 @@
|
|||
Configure and install wolfSSL with these options:
|
||||
|
||||
./configure --disable-shared --disable-asn --disable-filesystem \
|
||||
--enable-cryptonly --enable-sp=smallrsa2048 --enable-sp-math \
|
||||
--disable-dh --disable-ecc --disable-sha224 --enable-rsavfy
|
||||
make
|
||||
make install
|
||||
|
||||
(if any build issues due to previous installations please run 'ldconfig`)
|
||||
|
||||
To compile without Makefile:
|
||||
|
||||
gcc -Os -o verify verify.c /usr/local/lib/libwolfssl.a
|
||||
|
||||
|
||||
To verify the signature with the message:
|
||||
|
||||
./verify
|
||||
|
||||
|
||||
Best wishes in all your testing!
|
||||
|
||||
- The wolfSSL Team
|
||||
|
||||
|
|
@ -0,0 +1,175 @@
|
|||
/* verify.c
|
||||
*
|
||||
* Copyright (C) 2006-2018 wolfSSL Inc.
|
||||
*
|
||||
* This file is part of wolfSSL.
|
||||
*
|
||||
* wolfSSL 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 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wolfSSL 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, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <wolfssl/options.h>
|
||||
#include <wolfssl/wolfcrypt/rsa.h>
|
||||
#include <wolfssl/wolfcrypt/sha256.h>
|
||||
|
||||
/* RSA public key to verify with. */
|
||||
static const unsigned char public_key_2048_n[] = {
|
||||
0xC3, 0x03, 0xD1, 0x2B, 0xFE, 0x39, 0xA4, 0x32,
|
||||
0x45, 0x3B, 0x53, 0xC8, 0x84, 0x2B, 0x2A, 0x7C,
|
||||
0x74, 0x9A, 0xBD, 0xAA, 0x2A, 0x52, 0x07, 0x47,
|
||||
0xD6, 0xA6, 0x36, 0xB2, 0x07, 0x32, 0x8E, 0xD0,
|
||||
0xBA, 0x69, 0x7B, 0xC6, 0xC3, 0x44, 0x9E, 0xD4,
|
||||
0x81, 0x48, 0xFD, 0x2D, 0x68, 0xA2, 0x8B, 0x67,
|
||||
0xBB, 0xA1, 0x75, 0xC8, 0x36, 0x2C, 0x4A, 0xD2,
|
||||
0x1B, 0xF7, 0x8B, 0xBA, 0xCF, 0x0D, 0xF9, 0xEF,
|
||||
0xEC, 0xF1, 0x81, 0x1E, 0x7B, 0x9B, 0x03, 0x47,
|
||||
0x9A, 0xBF, 0x65, 0xCC, 0x7F, 0x65, 0x24, 0x69,
|
||||
0xA6, 0xE8, 0x14, 0x89, 0x5B, 0xE4, 0x34, 0xF7,
|
||||
0xC5, 0xB0, 0x14, 0x93, 0xF5, 0x67, 0x7B, 0x3A,
|
||||
0x7A, 0x78, 0xE1, 0x01, 0x56, 0x56, 0x91, 0xA6,
|
||||
0x13, 0x42, 0x8D, 0xD2, 0x3C, 0x40, 0x9C, 0x4C,
|
||||
0xEF, 0xD1, 0x86, 0xDF, 0x37, 0x51, 0x1B, 0x0C,
|
||||
0xA1, 0x3B, 0xF5, 0xF1, 0xA3, 0x4A, 0x35, 0xE4,
|
||||
0xE1, 0xCE, 0x96, 0xDF, 0x1B, 0x7E, 0xBF, 0x4E,
|
||||
0x97, 0xD0, 0x10, 0xE8, 0xA8, 0x08, 0x30, 0x81,
|
||||
0xAF, 0x20, 0x0B, 0x43, 0x14, 0xC5, 0x74, 0x67,
|
||||
0xB4, 0x32, 0x82, 0x6F, 0x8D, 0x86, 0xC2, 0x88,
|
||||
0x40, 0x99, 0x36, 0x83, 0xBA, 0x1E, 0x40, 0x72,
|
||||
0x22, 0x17, 0xD7, 0x52, 0x65, 0x24, 0x73, 0xB0,
|
||||
0xCE, 0xEF, 0x19, 0xCD, 0xAE, 0xFF, 0x78, 0x6C,
|
||||
0x7B, 0xC0, 0x12, 0x03, 0xD4, 0x4E, 0x72, 0x0D,
|
||||
0x50, 0x6D, 0x3B, 0xA3, 0x3B, 0xA3, 0x99, 0x5E,
|
||||
0x9D, 0xC8, 0xD9, 0x0C, 0x85, 0xB3, 0xD9, 0x8A,
|
||||
0xD9, 0x54, 0x26, 0xDB, 0x6D, 0xFA, 0xAC, 0xBB,
|
||||
0xFF, 0x25, 0x4C, 0xC4, 0xD1, 0x79, 0xF4, 0x71,
|
||||
0xD3, 0x86, 0x40, 0x18, 0x13, 0xB0, 0x63, 0xB5,
|
||||
0x72, 0x4E, 0x30, 0xC4, 0x97, 0x84, 0x86, 0x2D,
|
||||
0x56, 0x2F, 0xD7, 0x15, 0xF7, 0x7F, 0xC0, 0xAE,
|
||||
0xF5, 0xFC, 0x5B, 0xE5, 0xFB, 0xA1, 0xBA, 0xD3,
|
||||
};
|
||||
|
||||
static const unsigned long public_key_2048_e = 0x010001;
|
||||
|
||||
unsigned char msg[] = {
|
||||
0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20,
|
||||
0x74, 0x68, 0x65, 0x20, 0x6d, 0x65, 0x73, 0x73,
|
||||
0x61, 0x67, 0x65,
|
||||
};
|
||||
|
||||
unsigned char rsa_sig_2048[] = {
|
||||
0x41, 0xeb, 0xf5, 0x5e, 0x97, 0x43, 0xf4, 0xd1,
|
||||
0xda, 0xb6, 0x5c, 0x75, 0x57, 0x2c, 0xe1, 0x01,
|
||||
0x07, 0xdc, 0x42, 0xc4, 0x2d, 0xe2, 0xb5, 0xc8,
|
||||
0x63, 0xe8, 0x45, 0x9a, 0x4a, 0xfa, 0xdf, 0x5e,
|
||||
0xa6, 0x08, 0x0a, 0x26, 0x2e, 0xca, 0x2c, 0x10,
|
||||
0x7a, 0x15, 0x8d, 0xc1, 0x55, 0xcc, 0x33, 0xdb,
|
||||
0xb2, 0xef, 0x8b, 0xa6, 0x4b, 0xef, 0xa1, 0xcf,
|
||||
0xd3, 0xe2, 0x5d, 0xac, 0x88, 0x86, 0x62, 0x67,
|
||||
0x8b, 0x8c, 0x45, 0x7f, 0x10, 0xad, 0xfa, 0x27,
|
||||
0x7a, 0x35, 0x5a, 0xf9, 0x09, 0x78, 0x83, 0xba,
|
||||
0x18, 0xcb, 0x3e, 0x8e, 0x08, 0xbe, 0x36, 0xde,
|
||||
0xac, 0xc1, 0x77, 0x44, 0xe8, 0x43, 0xdb, 0x52,
|
||||
0x23, 0x08, 0x36, 0x8f, 0x74, 0x4a, 0xbd, 0xa3,
|
||||
0x3f, 0xc1, 0xfb, 0xd6, 0x45, 0x25, 0x61, 0xe2,
|
||||
0x19, 0xcb, 0x0b, 0x28, 0xef, 0xca, 0x0a, 0x3b,
|
||||
0x7b, 0x3d, 0xe3, 0x47, 0x46, 0x07, 0x1a, 0x7f,
|
||||
0xff, 0x38, 0xfd, 0x59, 0x94, 0x0b, 0xeb, 0x00,
|
||||
0xab, 0xcc, 0x8c, 0x48, 0x7b, 0xd6, 0x87, 0xb8,
|
||||
0x54, 0xb0, 0x2a, 0x07, 0xcf, 0x44, 0x11, 0xd4,
|
||||
0xb6, 0x9a, 0x4e, 0x6d, 0x5c, 0x1a, 0xe3, 0xc7,
|
||||
0xf3, 0xc7, 0xcb, 0x8e, 0x82, 0x7d, 0xc8, 0x77,
|
||||
0xf0, 0xb6, 0xd0, 0x85, 0xcb, 0xdb, 0xd0, 0xb0,
|
||||
0xe0, 0xcf, 0xca, 0x3f, 0x17, 0x46, 0x84, 0xcb,
|
||||
0x5b, 0xfe, 0x51, 0x3a, 0xaa, 0x71, 0xad, 0xeb,
|
||||
0xf1, 0xed, 0x3f, 0xf8, 0xde, 0xb4, 0xa1, 0x26,
|
||||
0xdb, 0xc6, 0x8e, 0x70, 0xd4, 0x58, 0xa8, 0x31,
|
||||
0xd8, 0xdb, 0xcf, 0x64, 0x4a, 0x5f, 0x1b, 0x89,
|
||||
0x22, 0x03, 0x3f, 0xab, 0xb5, 0x6d, 0x2a, 0x63,
|
||||
0x2f, 0x4e, 0x7a, 0xe1, 0x89, 0xb4, 0xf0, 0x9a,
|
||||
0xb7, 0xd3, 0xd6, 0x0a, 0x10, 0x67, 0x28, 0x25,
|
||||
0x6d, 0xda, 0x92, 0x99, 0x3f, 0x64, 0xa7, 0xea,
|
||||
0xe0, 0xdc, 0x7c, 0xe8, 0x41, 0xb0, 0xeb, 0x45,
|
||||
};
|
||||
|
||||
/* ASN.1 encoding of digest algorithm before hash */
|
||||
#define ENC_ALG_SZ 19
|
||||
|
||||
/* Main entry point.
|
||||
* Verifies the signature with the message and RSA public key.
|
||||
*
|
||||
* argc [in] Count of command line arguments.
|
||||
* argv [in] Command line argument vector.
|
||||
* Returns 0 on success and 1 otherwise.
|
||||
*/
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
int ret = 0;
|
||||
Sha256 sha256;
|
||||
Sha256* pSha256 = NULL;
|
||||
RsaKey rsaKey;
|
||||
RsaKey* pRsaKey = NULL;
|
||||
unsigned char* decSig = NULL;
|
||||
word32 decSigLen = 0;
|
||||
unsigned char encSig[ENC_ALG_SZ + WC_SHA256_DIGEST_SIZE] = {
|
||||
0x30, 0x31, 0x30, 0x0D, 0x06, 0x09, 0x60, 0x86,
|
||||
0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05,
|
||||
0x00, 0x04, 0x20, 0x00,
|
||||
};
|
||||
|
||||
/* Calculate SHA-256 digest of message */
|
||||
if (ret == 0)
|
||||
ret = wc_InitSha256(&sha256);
|
||||
if (ret == 0) {
|
||||
pSha256 = &sha256;
|
||||
ret = wc_Sha256Update(&sha256, msg, sizeof(msg));
|
||||
}
|
||||
if (ret == 0)
|
||||
ret = wc_Sha256Final(&sha256, encSig + ENC_ALG_SZ);
|
||||
|
||||
/* Initialize the RSA key and decode the DER encoded public key. */
|
||||
if (ret == 0)
|
||||
ret = wc_InitRsaKey(&rsaKey, NULL);
|
||||
if (ret == 0) {
|
||||
pRsaKey = &rsaKey;
|
||||
|
||||
ret = mp_read_unsigned_bin(&rsaKey.n, public_key_2048_n,
|
||||
sizeof(public_key_2048_n));
|
||||
}
|
||||
if (ret == 0)
|
||||
ret = mp_set_int(&rsaKey.e, public_key_2048_e);
|
||||
|
||||
/* Verify the signature by decrypting the value. */
|
||||
if (ret == 0) {
|
||||
decSigLen = wc_RsaSSL_VerifyInline(rsa_sig_2048, sizeof(rsa_sig_2048),
|
||||
&decSig, &rsaKey);
|
||||
if ((int)decSigLen < 0)
|
||||
ret = (int)decSigLen;
|
||||
}
|
||||
|
||||
/* Check the decrypted result matches the encoded digest. */
|
||||
if (ret == 0 && decSigLen != sizeof(encSig))
|
||||
ret = -1;
|
||||
if (ret == 0 && XMEMCMP(encSig, decSig, decSigLen) != 0)
|
||||
ret = -1;
|
||||
|
||||
/* Free the data structures */
|
||||
if (pRsaKey != NULL)
|
||||
wc_FreeRsaKey(pRsaKey);
|
||||
if (pSha256 != NULL)
|
||||
wc_Sha256Free(pSha256);
|
||||
|
||||
return ret == 0 ? 0 : 1;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue