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evp.c
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/* evp.c
*
* Copyright (C) 2006-2023 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
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <wolfssl/wolfcrypt/settings.h>
#if !defined(WOLFSSL_EVP_INCLUDED)
#ifndef WOLFSSL_IGNORE_FILE_WARN
#warning evp.c does not need to be compiled separately from ssl.c
#endif
#elif defined(WOLFCRYPT_ONLY)
#else
#if defined(OPENSSL_EXTRA)
#if !defined(HAVE_PKCS7) && \
((defined(HAVE_FIPS) && defined(HAVE_FIPS_VERSION) && \
(HAVE_FIPS_VERSION == 2)) || defined(HAVE_SELFTEST))
#include <wolfssl/wolfcrypt/aes.h>
#endif
#include <wolfssl/openssl/ecdsa.h>
#include <wolfssl/openssl/evp.h>
#include <wolfssl/openssl/kdf.h>
#include <wolfssl/wolfcrypt/integer.h>
#ifndef NO_AES
#if defined(HAVE_AES_CBC) || defined(WOLFSSL_AES_DIRECT)
#ifdef WOLFSSL_AES_128
static const char EVP_AES_128_CBC[] = "AES-128-CBC";
#endif
#ifdef WOLFSSL_AES_192
static const char EVP_AES_192_CBC[] = "AES-192-CBC";
#endif
#ifdef WOLFSSL_AES_256
static const char EVP_AES_256_CBC[] = "AES-256-CBC";
#endif
#endif /* HAVE_AES_CBC || WOLFSSL_AES_DIRECT */
#ifdef WOLFSSL_AES_OFB
#ifdef WOLFSSL_AES_128
static const char EVP_AES_128_OFB[] = "AES-128-OFB";
#endif
#ifdef WOLFSSL_AES_192
static const char EVP_AES_192_OFB[] = "AES-192-OFB";
#endif
#ifdef WOLFSSL_AES_256
static const char EVP_AES_256_OFB[] = "AES-256-OFB";
#endif
#endif /* WOLFSSL_AES_OFB */
#ifdef WOLFSSL_AES_XTS
#ifdef WOLFSSL_AES_128
static const char EVP_AES_128_XTS[] = "AES-128-XTS";
#endif
#ifdef WOLFSSL_AES_256
static const char EVP_AES_256_XTS[] = "AES-256-XTS";
#endif
#endif /* WOLFSSL_AES_XTS */
#ifdef WOLFSSL_AES_CFB
#ifdef WOLFSSL_AES_128
static const char EVP_AES_128_CFB1[] = "AES-128-CFB1";
#endif
#ifdef WOLFSSL_AES_192
static const char EVP_AES_192_CFB1[] = "AES-192-CFB1";
#endif
#ifdef WOLFSSL_AES_256
static const char EVP_AES_256_CFB1[] = "AES-256-CFB1";
#endif
#ifdef WOLFSSL_AES_128
static const char EVP_AES_128_CFB8[] = "AES-128-CFB8";
#endif
#ifdef WOLFSSL_AES_192
static const char EVP_AES_192_CFB8[] = "AES-192-CFB8";
#endif
#ifdef WOLFSSL_AES_256
static const char EVP_AES_256_CFB8[] = "AES-256-CFB8";
#endif
#ifdef WOLFSSL_AES_128
static const char EVP_AES_128_CFB128[] = "AES-128-CFB128";
#endif
#ifdef WOLFSSL_AES_192
static const char EVP_AES_192_CFB128[] = "AES-192-CFB128";
#endif
#ifdef WOLFSSL_AES_256
static const char EVP_AES_256_CFB128[] = "AES-256-CFB128";
#endif
#endif /* WOLFSSL_AES_CFB */
#ifdef HAVE_AESGCM
#ifdef WOLFSSL_AES_128
static const char EVP_AES_128_GCM[] = "AES-128-GCM";
#endif
#ifdef WOLFSSL_AES_192
static const char EVP_AES_192_GCM[] = "AES-192-GCM";
#endif
#ifdef WOLFSSL_AES_256
static const char EVP_AES_256_GCM[] = "AES-256-GCM";
#endif
#endif /* HAVE_AESGCM */
#ifdef HAVE_AESCCM
#ifdef WOLFSSL_AES_128
static const char EVP_AES_128_CCM[] = "AES-128-CCM";
#endif
#ifdef WOLFSSL_AES_192
static const char EVP_AES_192_CCM[] = "AES-192-CCM";
#endif
#ifdef WOLFSSL_AES_256
static const char EVP_AES_256_CCM[] = "AES-256-CCM";
#endif
#endif /* HAVE_AESCCM */
#ifdef WOLFSSL_AES_COUNTER
#ifdef WOLFSSL_AES_128
static const char EVP_AES_128_CTR[] = "AES-128-CTR";
#endif
#ifdef WOLFSSL_AES_192
static const char EVP_AES_192_CTR[] = "AES-192-CTR";
#endif
#ifdef WOLFSSL_AES_256
static const char EVP_AES_256_CTR[] = "AES-256-CTR";
#endif
#endif
#ifdef HAVE_AES_ECB
#ifdef WOLFSSL_AES_128
static const char EVP_AES_128_ECB[] = "AES-128-ECB";
#endif
#ifdef WOLFSSL_AES_192
static const char EVP_AES_192_ECB[] = "AES-192-ECB";
#endif
#ifdef WOLFSSL_AES_256
static const char EVP_AES_256_ECB[] = "AES-256-ECB";
#endif
#endif
#endif
#ifndef NO_DES3
static const char EVP_DES_CBC[] = "DES-CBC";
static const char EVP_DES_ECB[] = "DES-ECB";
static const char EVP_DES_EDE3_CBC[] = "DES-EDE3-CBC";
static const char EVP_DES_EDE3_ECB[] = "DES-EDE3-ECB";
#endif
#ifndef NO_RC4
static const char EVP_ARC4[] = "ARC4";
#endif
#if defined(HAVE_CHACHA) && defined(HAVE_POLY1305)
static const char EVP_CHACHA20_POLY1305[] = "CHACHA20-POLY1305";
#endif
#ifdef HAVE_CHACHA
static const char EVP_CHACHA20[] = "CHACHA20";
#endif
static const char EVP_NULL[] = "NULL";
#define EVP_CIPHER_TYPE_MATCHES(x, y) (XSTRCMP(x,y) == 0)
#define EVP_PKEY_PRINT_LINE_WIDTH_MAX 80
#define EVP_PKEY_PRINT_DIGITS_PER_LINE 15
static unsigned int cipherType(const WOLFSSL_EVP_CIPHER *cipher);
static enum wc_HashType EvpMd2MacType(const WOLFSSL_EVP_MD *md);
/* Getter function for cipher key length
*
* c WOLFSSL_EVP_CIPHER structure to get key length from
*
* NOTE: OpenSSL_add_all_ciphers() should be called first before using this
* function
*
* Returns size of key in bytes
*/
int wolfSSL_EVP_Cipher_key_length(const WOLFSSL_EVP_CIPHER* c)
{
WOLFSSL_ENTER("wolfSSL_EVP_Cipher_key_length");
if (c == NULL) {
return 0;
}
switch (cipherType(c)) {
#if !defined(NO_AES)
#if defined(HAVE_AES_CBC) || defined(WOLFSSL_AES_DIRECT)
case AES_128_CBC_TYPE: return 16;
case AES_192_CBC_TYPE: return 24;
case AES_256_CBC_TYPE: return 32;
#endif
#if defined(WOLFSSL_AES_CFB)
case AES_128_CFB1_TYPE: return 16;
case AES_192_CFB1_TYPE: return 24;
case AES_256_CFB1_TYPE: return 32;
case AES_128_CFB8_TYPE: return 16;
case AES_192_CFB8_TYPE: return 24;
case AES_256_CFB8_TYPE: return 32;
case AES_128_CFB128_TYPE: return 16;
case AES_192_CFB128_TYPE: return 24;
case AES_256_CFB128_TYPE: return 32;
#endif
#if defined(WOLFSSL_AES_OFB)
case AES_128_OFB_TYPE: return 16;
case AES_192_OFB_TYPE: return 24;
case AES_256_OFB_TYPE: return 32;
#endif
#if defined(WOLFSSL_AES_XTS)
/* Two keys for XTS. */
case AES_128_XTS_TYPE: return 16 * 2;
case AES_256_XTS_TYPE: return 32 * 2;
#endif
#if defined(HAVE_AESGCM)
case AES_128_GCM_TYPE: return 16;
case AES_192_GCM_TYPE: return 24;
case AES_256_GCM_TYPE: return 32;
#endif
#if defined(HAVE_AESCCM)
case AES_128_CCM_TYPE: return 16;
case AES_192_CCM_TYPE: return 24;
case AES_256_CCM_TYPE: return 32;
#endif
#if defined(WOLFSSL_AES_COUNTER)
case AES_128_CTR_TYPE: return 16;
case AES_192_CTR_TYPE: return 24;
case AES_256_CTR_TYPE: return 32;
#endif
#if defined(HAVE_AES_ECB)
case AES_128_ECB_TYPE: return 16;
case AES_192_ECB_TYPE: return 24;
case AES_256_ECB_TYPE: return 32;
#endif
#endif /* !NO_AES */
#ifndef NO_DES3
case DES_CBC_TYPE: return 8;
case DES_EDE3_CBC_TYPE: return 24;
case DES_ECB_TYPE: return 8;
case DES_EDE3_ECB_TYPE: return 24;
#endif
#if defined(HAVE_CHACHA) && defined(HAVE_POLY1305)
case CHACHA20_POLY1305_TYPE: return 32;
#endif
#ifdef HAVE_CHACHA
case CHACHA20_TYPE: return CHACHA_MAX_KEY_SZ;
#endif
default:
return 0;
}
}
int wolfSSL_EVP_EncryptInit(WOLFSSL_EVP_CIPHER_CTX* ctx,
const WOLFSSL_EVP_CIPHER* type,
const unsigned char* key,
const unsigned char* iv)
{
return wolfSSL_EVP_CipherInit(ctx, type, (byte*)key, (byte*)iv, 1);
}
int wolfSSL_EVP_EncryptInit_ex(WOLFSSL_EVP_CIPHER_CTX* ctx,
const WOLFSSL_EVP_CIPHER* type,
WOLFSSL_ENGINE *impl,
const unsigned char* key,
const unsigned char* iv)
{
(void) impl;
return wolfSSL_EVP_CipherInit(ctx, type, (byte*)key, (byte*)iv, 1);
}
int wolfSSL_EVP_DecryptInit(WOLFSSL_EVP_CIPHER_CTX* ctx,
const WOLFSSL_EVP_CIPHER* type,
const unsigned char* key,
const unsigned char* iv)
{
WOLFSSL_ENTER("wolfSSL_EVP_CipherInit");
return wolfSSL_EVP_CipherInit(ctx, type, (byte*)key, (byte*)iv, 0);
}
int wolfSSL_EVP_DecryptInit_ex(WOLFSSL_EVP_CIPHER_CTX* ctx,
const WOLFSSL_EVP_CIPHER* type,
WOLFSSL_ENGINE *impl,
const unsigned char* key,
const unsigned char* iv)
{
(void) impl;
WOLFSSL_ENTER("wolfSSL_EVP_DecryptInit");
return wolfSSL_EVP_CipherInit(ctx, type, (byte*)key, (byte*)iv, 0);
}
WOLFSSL_EVP_CIPHER_CTX *wolfSSL_EVP_CIPHER_CTX_new(void)
{
WOLFSSL_EVP_CIPHER_CTX *ctx = (WOLFSSL_EVP_CIPHER_CTX*)XMALLOC(sizeof *ctx,
NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (ctx) {
WOLFSSL_ENTER("wolfSSL_EVP_CIPHER_CTX_new");
wolfSSL_EVP_CIPHER_CTX_init(ctx);
}
return ctx;
}
void wolfSSL_EVP_CIPHER_CTX_free(WOLFSSL_EVP_CIPHER_CTX *ctx)
{
if (ctx) {
WOLFSSL_ENTER("wolfSSL_EVP_CIPHER_CTX_free");
wolfSSL_EVP_CIPHER_CTX_cleanup(ctx);
XFREE(ctx, NULL, DYNAMIC_TYPE_TMP_BUFFER);
}
}
int wolfSSL_EVP_CIPHER_CTX_reset(WOLFSSL_EVP_CIPHER_CTX *ctx)
{
int ret = WOLFSSL_FAILURE;
if (ctx != NULL) {
WOLFSSL_ENTER("wolfSSL_EVP_CIPHER_CTX_reset");
wolfSSL_EVP_CIPHER_CTX_cleanup(ctx);
ret = WOLFSSL_SUCCESS;
}
return ret;
}
unsigned long wolfSSL_EVP_CIPHER_CTX_mode(const WOLFSSL_EVP_CIPHER_CTX *ctx)
{
if (ctx == NULL) return 0;
return ctx->flags & WOLFSSL_EVP_CIPH_MODE;
}
unsigned long wolfSSL_EVP_CIPHER_CTX_flags(const WOLFSSL_EVP_CIPHER_CTX *ctx)
{
if (ctx == NULL) return 0;
return ctx->flags;
}
int wolfSSL_EVP_EncryptFinal(WOLFSSL_EVP_CIPHER_CTX *ctx,
unsigned char *out, int *outl)
{
if (ctx && ctx->enc) {
WOLFSSL_ENTER("wolfSSL_EVP_EncryptFinal");
return wolfSSL_EVP_CipherFinal(ctx, out, outl);
}
else
return WOLFSSL_FAILURE;
}
int wolfSSL_EVP_CipherInit_ex(WOLFSSL_EVP_CIPHER_CTX* ctx,
const WOLFSSL_EVP_CIPHER* type,
WOLFSSL_ENGINE *impl,
const unsigned char* key,
const unsigned char* iv,
int enc)
{
(void)impl;
return wolfSSL_EVP_CipherInit(ctx, type, key, iv, enc);
}
int wolfSSL_EVP_EncryptFinal_ex(WOLFSSL_EVP_CIPHER_CTX *ctx,
unsigned char *out, int *outl)
{
if (ctx && ctx->enc) {
WOLFSSL_ENTER("wolfSSL_EVP_EncryptFinal_ex");
return wolfSSL_EVP_CipherFinal(ctx, out, outl);
}
else
return WOLFSSL_FAILURE;
}
int wolfSSL_EVP_DecryptFinal(WOLFSSL_EVP_CIPHER_CTX *ctx,
unsigned char *out, int *outl)
{
if (ctx && !ctx->enc) {
WOLFSSL_ENTER("wolfSSL_EVP_DecryptFinal");
return wolfSSL_EVP_CipherFinal(ctx, out, outl);
}
else {
return WOLFSSL_FAILURE;
}
}
int wolfSSL_EVP_DecryptFinal_ex(WOLFSSL_EVP_CIPHER_CTX *ctx,
unsigned char *out, int *outl)
{
if (ctx && !ctx->enc) {
WOLFSSL_ENTER("wolfSSL_EVP_DecryptFinal_ex");
return wolfSSL_EVP_CipherFinal(ctx, out, outl);
}
else {
return WOLFSSL_FAILURE;
}
}
int wolfSSL_EVP_DigestInit_ex(WOLFSSL_EVP_MD_CTX* ctx,
const WOLFSSL_EVP_MD* type,
WOLFSSL_ENGINE *impl)
{
(void) impl;
WOLFSSL_ENTER("wolfSSL_EVP_DigestInit_ex");
return wolfSSL_EVP_DigestInit(ctx, type);
}
#ifdef DEBUG_WOLFSSL_EVP
#define PRINT_BUF(b, sz) { int _i; for(_i=0; _i<(sz); _i++) { \
printf("%02x(%c),", (b)[_i], (b)[_i]); if ((_i+1)%8==0)printf("\n");}}
#else
#define PRINT_BUF(b, sz)
#endif
static int fillBuff(WOLFSSL_EVP_CIPHER_CTX *ctx, const unsigned char *in, int sz)
{
int fill;
if (sz > 0) {
if ((sz+ctx->bufUsed) > ctx->block_size) {
fill = ctx->block_size - ctx->bufUsed;
} else {
fill = sz;
}
XMEMCPY(&(ctx->buf[ctx->bufUsed]), in, fill);
ctx->bufUsed += fill;
return fill;
} else return 0;
}
static int evpCipherBlock(WOLFSSL_EVP_CIPHER_CTX *ctx,
unsigned char *out,
const unsigned char *in, int inl)
{
int ret = 0;
switch (ctx->cipherType) {
#if !defined(NO_AES)
#if defined(HAVE_AES_CBC)
case AES_128_CBC_TYPE:
case AES_192_CBC_TYPE:
case AES_256_CBC_TYPE:
if (ctx->enc)
ret = wc_AesCbcEncrypt(&ctx->cipher.aes, out, in, inl);
else
ret = wc_AesCbcDecrypt(&ctx->cipher.aes, out, in, inl);
break;
#endif
#if defined(WOLFSSL_AES_COUNTER)
case AES_128_CTR_TYPE:
case AES_192_CTR_TYPE:
case AES_256_CTR_TYPE:
ret = wc_AesCtrEncrypt(&ctx->cipher.aes, out, in, inl);
break;
#endif
#if defined(HAVE_AES_ECB)
case AES_128_ECB_TYPE:
case AES_192_ECB_TYPE:
case AES_256_ECB_TYPE:
if (ctx->enc)
ret = wc_AesEcbEncrypt(&ctx->cipher.aes, out, in, inl);
else
ret = wc_AesEcbDecrypt(&ctx->cipher.aes, out, in, inl);
break;
#endif
#if defined(WOLFSSL_AES_OFB)
case AES_128_OFB_TYPE:
case AES_192_OFB_TYPE:
case AES_256_OFB_TYPE:
if (ctx->enc)
ret = wc_AesOfbEncrypt(&ctx->cipher.aes, out, in, inl);
else
ret = wc_AesOfbDecrypt(&ctx->cipher.aes, out, in, inl);
break;
#endif
#if defined(WOLFSSL_AES_CFB)
#if !defined(HAVE_SELFTEST) && !defined(HAVE_FIPS)
case AES_128_CFB1_TYPE:
case AES_192_CFB1_TYPE:
case AES_256_CFB1_TYPE:
if (ctx->enc)
ret = wc_AesCfb1Encrypt(&ctx->cipher.aes, out, in,
inl * WOLFSSL_BIT_SIZE);
else
ret = wc_AesCfb1Decrypt(&ctx->cipher.aes, out, in,
inl * WOLFSSL_BIT_SIZE);
break;
case AES_128_CFB8_TYPE:
case AES_192_CFB8_TYPE:
case AES_256_CFB8_TYPE:
if (ctx->enc)
ret = wc_AesCfb8Encrypt(&ctx->cipher.aes, out, in, inl);
else
ret = wc_AesCfb8Decrypt(&ctx->cipher.aes, out, in, inl);
break;
#endif /* !HAVE_SELFTEST && !HAVE_FIPS */
case AES_128_CFB128_TYPE:
case AES_192_CFB128_TYPE:
case AES_256_CFB128_TYPE:
if (ctx->enc)
ret = wc_AesCfbEncrypt(&ctx->cipher.aes, out, in, inl);
else
ret = wc_AesCfbDecrypt(&ctx->cipher.aes, out, in, inl);
break;
#endif
#if defined(WOLFSSL_AES_XTS)
case AES_128_XTS_TYPE:
case AES_256_XTS_TYPE:
if (ctx->enc)
ret = wc_AesXtsEncrypt(&ctx->cipher.xts, out, in, inl,
ctx->iv, ctx->ivSz);
else
ret = wc_AesXtsDecrypt(&ctx->cipher.xts, out, in, inl,
ctx->iv, ctx->ivSz);
break;
#endif
#endif /* !NO_AES */
#ifndef NO_DES3
case DES_CBC_TYPE:
if (ctx->enc)
ret = wc_Des_CbcEncrypt(&ctx->cipher.des, out, in, inl);
else
ret = wc_Des_CbcDecrypt(&ctx->cipher.des, out, in, inl);
break;
case DES_EDE3_CBC_TYPE:
if (ctx->enc)
ret = wc_Des3_CbcEncrypt(&ctx->cipher.des3, out, in, inl);
else
ret = wc_Des3_CbcDecrypt(&ctx->cipher.des3, out, in, inl);
break;
#if defined(WOLFSSL_DES_ECB)
case DES_ECB_TYPE:
ret = wc_Des_EcbEncrypt(&ctx->cipher.des, out, in, inl);
break;
case DES_EDE3_ECB_TYPE:
ret = wc_Des3_EcbEncrypt(&ctx->cipher.des3, out, in, inl);
break;
#endif
#endif
#ifndef NO_RC4
case ARC4_TYPE:
wc_Arc4Process(&ctx->cipher.arc4, out, in, inl);
break;
#endif
default:
ret = WOLFSSL_FAILURE;
}
(void)in;
(void)inl;
(void)out;
return (ret == 0) ? WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
}
#if defined(HAVE_AESGCM)
#ifndef WOLFSSL_AESGCM_STREAM
static int wolfSSL_EVP_CipherUpdate_GCM_AAD(WOLFSSL_EVP_CIPHER_CTX *ctx,
const unsigned char *in, int inl) {
if (in && inl > 0) {
byte* tmp = (byte*)XREALLOC(ctx->authIn,
ctx->authInSz + inl, NULL, DYNAMIC_TYPE_OPENSSL);
if (tmp) {
ctx->authIn = tmp;
XMEMCPY(ctx->authIn + ctx->authInSz, in, inl);
ctx->authInSz += inl;
}
else {
WOLFSSL_MSG("realloc error");
return MEMORY_E;
}
}
return 0;
}
#endif /* WOLFSSL_AESGCM_STREAM */
static int wolfSSL_EVP_CipherUpdate_GCM(WOLFSSL_EVP_CIPHER_CTX *ctx,
unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
#ifndef WOLFSSL_AESGCM_STREAM
int ret = 0;
*outl = inl;
if (out) {
/* Buffer input for one-shot API */
if (inl > 0) {
byte* tmp;
tmp = (byte*)XREALLOC(ctx->authBuffer,
ctx->authBufferLen + inl, NULL,
DYNAMIC_TYPE_OPENSSL);
if (tmp) {
XMEMCPY(tmp + ctx->authBufferLen, in, inl);
ctx->authBufferLen += inl;
ctx->authBuffer = tmp;
*outl = 0;
}
else {
ret = MEMORY_E;
}
}
}
else {
ret = wolfSSL_EVP_CipherUpdate_GCM_AAD(ctx, in, inl);
}
if (ret != 0) {
*outl = 0;
return WOLFSSL_FAILURE;
}
return WOLFSSL_SUCCESS;
#else
int ret;
/* When out is NULL then this is AAD. */
if (out == NULL) {
if (ctx->enc) {
ret = wc_AesGcmEncryptUpdate(&ctx->cipher.aes, NULL, NULL, 0, in,
inl);
}
else {
ret = wc_AesGcmDecryptUpdate(&ctx->cipher.aes, NULL, NULL, 0, in,
inl);
}
}
/* When out is not NULL then this is plaintext/cipher text. */
else {
if (ctx->enc) {
ret = wc_AesGcmEncryptUpdate(&ctx->cipher.aes, out, in, inl, NULL,
0);
}
else {
ret = wc_AesGcmDecryptUpdate(&ctx->cipher.aes, out, in, inl, NULL,
0);
}
}
*outl = inl;
if (ret == 0) {
ret = WOLFSSL_SUCCESS;
}
else {
ret = WOLFSSL_FAILURE;
}
return ret;
#endif /* WOLFSSL_AESGCM_STREAM */
}
#endif /* HAVE_AESGCM */
#if defined(HAVE_AESCCM)
static int wolfSSL_EVP_CipherUpdate_CCM_AAD(WOLFSSL_EVP_CIPHER_CTX *ctx,
const unsigned char *in, int inl) {
if (in && inl > 0) {
byte* tmp = (byte*)XREALLOC(ctx->authIn,
ctx->authInSz + inl, NULL, DYNAMIC_TYPE_OPENSSL);
if (tmp) {
ctx->authIn = tmp;
XMEMCPY(ctx->authIn + ctx->authInSz, in, inl);
ctx->authInSz += inl;
}
else {
WOLFSSL_MSG("realloc error");
return MEMORY_E;
}
}
return 0;
}
static int wolfSSL_EVP_CipherUpdate_CCM(WOLFSSL_EVP_CIPHER_CTX *ctx,
unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
int ret = 0;
*outl = inl;
if (out) {
/* Buffer input for one-shot API */
if (inl > 0) {
byte* tmp;
tmp = (byte*)XREALLOC(ctx->authBuffer,
ctx->authBufferLen + inl, NULL,
DYNAMIC_TYPE_OPENSSL);
if (tmp) {
XMEMCPY(tmp + ctx->authBufferLen, in, inl);
ctx->authBufferLen += inl;
ctx->authBuffer = tmp;
*outl = 0;
}
else {
ret = MEMORY_E;
}
}
}
else {
ret = wolfSSL_EVP_CipherUpdate_CCM_AAD(ctx, in, inl);
}
if (ret != 0) {
*outl = 0;
return WOLFSSL_FAILURE;
}
return WOLFSSL_SUCCESS;
}
#endif /* HAVE_AESCCM */
/* returns WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on failure */
int wolfSSL_EVP_CipherUpdate(WOLFSSL_EVP_CIPHER_CTX *ctx,
unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
int blocks;
int fill;
WOLFSSL_ENTER("wolfSSL_EVP_CipherUpdate");
if ((ctx == NULL) || (outl == NULL)) {
WOLFSSL_MSG("Bad argument");
return WOLFSSL_FAILURE;
}
*outl = 0;
if ((inl == 0) && (in == NULL)) {
/* Nothing to do in this case. Just return. */
return WOLFSSL_SUCCESS;
}
if ((inl < 0) || (in == NULL)) {
WOLFSSL_MSG("Bad argument");
return WOLFSSL_FAILURE;
}
switch (ctx->cipherType) {
#if !defined(NO_AES) && defined(HAVE_AESGCM)
case AES_128_GCM_TYPE:
case AES_192_GCM_TYPE:
case AES_256_GCM_TYPE:
/* if out == NULL, in/inl contains the additional auth data */
return wolfSSL_EVP_CipherUpdate_GCM(ctx, out, outl, in, inl);
#endif /* !defined(NO_AES) && defined(HAVE_AESGCM) */
#if !defined(NO_AES) && defined(HAVE_AESCCM)
case AES_128_CCM_TYPE:
case AES_192_CCM_TYPE:
case AES_256_CCM_TYPE:
/* if out == NULL, in/inl contains the
* additional auth data */
return wolfSSL_EVP_CipherUpdate_CCM(ctx, out, outl, in, inl);
#endif /* !defined(NO_AES) && defined(HAVE_AESCCM) */
#if defined(HAVE_CHACHA) && defined(HAVE_POLY1305)
case CHACHA20_POLY1305_TYPE:
if (out == NULL) {
if (wc_ChaCha20Poly1305_UpdateAad(&ctx->cipher.chachaPoly, in,
inl) != 0) {
WOLFSSL_MSG("wc_ChaCha20Poly1305_UpdateAad failed");
return WOLFSSL_FAILURE;
}
else {
*outl = inl;
return WOLFSSL_SUCCESS;
}
}
else {
if (wc_ChaCha20Poly1305_UpdateData(&ctx->cipher.chachaPoly, in,
out, inl) != 0) {
WOLFSSL_MSG("wc_ChaCha20Poly1305_UpdateData failed");
return WOLFSSL_FAILURE;
}
else {
*outl = inl;
return WOLFSSL_SUCCESS;
}
}
#endif
#ifdef HAVE_CHACHA
case CHACHA20_TYPE:
if (wc_Chacha_Process(&ctx->cipher.chacha, out, in, inl) != 0) {
WOLFSSL_MSG("wc_ChaCha_Process failed");
return WOLFSSL_FAILURE;
}
*outl = inl;
return WOLFSSL_SUCCESS;
#endif
default:
/* fall-through */
break;
}
if (out == NULL) {
return WOLFSSL_FAILURE;
}
/* if(inl == 0)wolfSSL_EVP_CipherUpdate_GCM to get tag */
if (inl == 0) {
return WOLFSSL_SUCCESS;
}
if (ctx->bufUsed > 0) { /* concatenate them if there is anything */
fill = fillBuff(ctx, in, inl);
inl -= fill;
in += fill;
}
/* check if the buff is full, and if so flash it out */
if (ctx->bufUsed == ctx->block_size) {
byte* output = out;
/* During decryption we save the last block to check padding on Final.
* Update the last block stored if one has already been stored */
if (ctx->enc == 0) {
if (ctx->lastUsed == 1) {
XMEMCPY(out, ctx->lastBlock, ctx->block_size);
*outl+= ctx->block_size;
out += ctx->block_size;
}
output = ctx->lastBlock; /* redirect output to last block buffer */
ctx->lastUsed = 1;
}
PRINT_BUF(ctx->buf, ctx->block_size);
if (evpCipherBlock(ctx, output, ctx->buf, ctx->block_size) == 0) {
return WOLFSSL_FAILURE;
}
PRINT_BUF(out, ctx->block_size);
ctx->bufUsed = 0;
/* if doing encryption update the new output block, decryption will
* always have the last block saved for when Final is called */
if ((ctx->enc != 0)) {
*outl+= ctx->block_size;
out += ctx->block_size;
}
}
blocks = inl / ctx->block_size;
if (blocks > 0) {
/* During decryption we save the last block to check padding on Final.
* Update the last block stored if one has already been stored */
if ((ctx->enc == 0) && (ctx->lastUsed == 1)) {
PRINT_BUF(ctx->lastBlock, ctx->block_size);
XMEMCPY(out, ctx->lastBlock, ctx->block_size);
*outl += ctx->block_size;
out += ctx->block_size;
ctx->lastUsed = 0;
}
/* process blocks */
if (evpCipherBlock(ctx, out, in, blocks * ctx->block_size) == 0) {
return WOLFSSL_FAILURE;
}
PRINT_BUF(in, ctx->block_size*blocks);
PRINT_BUF(out,ctx->block_size*blocks);
inl -= ctx->block_size * blocks;
in += ctx->block_size * blocks;
if (ctx->enc == 0) {
if ((ctx->flags & WOLFSSL_EVP_CIPH_NO_PADDING) ||
(ctx->block_size == 1)) {
ctx->lastUsed = 0;
*outl += ctx->block_size * blocks;
} else {
/* in the case of decryption and padding, store the last block
* here in order to verify the padding when Final is called */
if (inl == 0) { /* if not 0 then we know leftovers are checked*/
ctx->lastUsed = 1;
blocks = blocks - 1; /* save last block to check padding in
* EVP_CipherFinal call */
XMEMCPY(ctx->lastBlock, &out[ctx->block_size * blocks],
ctx->block_size);
}
*outl += ctx->block_size * blocks;
}
} else {
*outl += ctx->block_size * blocks;
}
}
if (inl > 0) {
/* put fraction into buff */
fillBuff(ctx, in, inl);
/* no increase of outl */
}
(void)out; /* silence warning in case not read */
return WOLFSSL_SUCCESS;
}
static void padBlock(WOLFSSL_EVP_CIPHER_CTX *ctx)
{
int i;
for (i = ctx->bufUsed; i < ctx->block_size; i++)
ctx->buf[i] = (byte)(ctx->block_size - ctx->bufUsed);
}
static int checkPad(WOLFSSL_EVP_CIPHER_CTX *ctx, unsigned char *buff)
{
int i;
int n;
n = buff[ctx->block_size-1];
if (n > ctx->block_size) return -1;
for (i = 0; i < n; i++) {
if (buff[ctx->block_size-i-1] != n)
return -1;
}
return ctx->block_size - n;
}
#if (defined(HAVE_AESGCM) || defined(HAVE_AESCCM)) && \
((!defined(HAVE_FIPS) && !defined(HAVE_SELFTEST)) \
|| FIPS_VERSION_GE(2,0))
static WC_INLINE void IncCtr(byte* ctr, word32 ctrSz)
{
int i;
for (i = ctrSz-1; i >= 0; i--) {
if (++ctr[i])
break;
}
}
#endif /* HAVE_AESGCM && ((!HAVE_FIPS && !HAVE_SELFTEST) ||
* HAVE_FIPS_VERSION >= 2 */
int wolfSSL_EVP_CipherFinal(WOLFSSL_EVP_CIPHER_CTX *ctx, unsigned char *out,
int *outl)
{
int fl;
int ret = WOLFSSL_SUCCESS;
#if (defined(HAVE_AESGCM) || defined(HAVE_AESCCM)) && \
((!defined(HAVE_FIPS) && !defined(HAVE_SELFTEST)) \
|| FIPS_VERSION_GE(2,0))
byte tmp = 0;
#endif
if (!ctx || !outl)
return WOLFSSL_FAILURE;
WOLFSSL_ENTER("wolfSSL_EVP_CipherFinal");
switch (ctx->cipherType) {
#if defined(HAVE_AESGCM) && ((!defined(HAVE_FIPS) && !defined(HAVE_SELFTEST)) \
|| FIPS_VERSION_GE(2,0))
case AES_128_GCM_TYPE:
case AES_192_GCM_TYPE:
case AES_256_GCM_TYPE:
#ifndef WOLFSSL_AESGCM_STREAM
if ((ctx->authBuffer && ctx->authBufferLen > 0)
|| (ctx->authBufferLen == 0)) {
if (ctx->enc)
ret = wc_AesGcmEncrypt(&ctx->cipher.aes, out,
ctx->authBuffer, ctx->authBufferLen,
ctx->iv, ctx->ivSz, ctx->authTag, ctx->authTagSz,
ctx->authIn, ctx->authInSz);
else
ret = wc_AesGcmDecrypt(&ctx->cipher.aes, out,
ctx->authBuffer, ctx->authBufferLen,
ctx->iv, ctx->ivSz, ctx->authTag, ctx->authTagSz,
ctx->authIn, ctx->authInSz);
if (ret == 0) {
ret = WOLFSSL_SUCCESS;
*outl = ctx->authBufferLen;
}
else {
ret = WOLFSSL_FAILURE;
*outl = 0;
}
XFREE(ctx->authBuffer, NULL, DYNAMIC_TYPE_OPENSSL);
ctx->authBuffer = NULL;
ctx->authBufferLen = 0;
if (ctx->authIncIv) {
IncCtr((byte*)ctx->cipher.aes.reg,
ctx->cipher.aes.nonceSz);
ctx->authIncIv = 0;
}
}
else {