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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifdef FREEBL_NO_DEPEND
#include "stubs.h"
#endif
#include <string.h>
#include <stdio.h>
#include "seccomon.h"
#include "secerr.h"
#include "blapit.h"
#include "blapii.h"
#include "chacha20poly1305.h"
// There are three implementations of ChaCha20Poly1305:
// 1) 128-bit with AVX hardware acceleration used on x64
// 2) 256-bit with AVX2 hardware acceleration used on x64
// 3) 32-bit used on all other platforms
// On x64 when AVX2 and other necessary registers are available,
// the 256bit-verctorized version will be used. When AVX2 features
// are unavailable or disabled but AVX registers are available, the
// 128bit-vectorized version will be used. In all other cases the
// scalar version of the HACL* code will be used.
// Instead of including the headers (they bring other things we don't want),
// we declare the functions here.
// Usage is guarded by runtime checks of required hardware features.
// Forward declaration from Hacl_Chacha20_Vec128.h and Hacl_Chacha20Poly1305_128.h.
extern void Hacl_Chacha20_Vec128_chacha20_encrypt_128(uint32_t len, uint8_t *out,
uint8_t *text, uint8_t *key,
uint8_t *n1, uint32_t ctr);
extern void
Hacl_Chacha20Poly1305_128_aead_encrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
extern uint32_t
Hacl_Chacha20Poly1305_128_aead_decrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
// Forward declaration from Hacl_Chacha20_Vec256.h and Hacl_Chacha20Poly1305_256.h.
extern void Hacl_Chacha20_Vec256_chacha20_encrypt_256(uint32_t len, uint8_t *out,
uint8_t *text, uint8_t *key,
uint8_t *n1, uint32_t ctr);
extern void
Hacl_Chacha20Poly1305_256_aead_encrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
extern uint32_t
Hacl_Chacha20Poly1305_256_aead_decrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
// Forward declaration from Hacl_Chacha20.h and Hacl_Chacha20Poly1305_32.h.
extern void Hacl_Chacha20_chacha20_encrypt(uint32_t len, uint8_t *out,
uint8_t *text, uint8_t *key,
uint8_t *n1, uint32_t ctr);
extern void
Hacl_Chacha20Poly1305_32_aead_encrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
extern uint32_t
Hacl_Chacha20Poly1305_32_aead_decrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
// Forward declaration from chacha20-ppc64le.S
void chacha20vsx(uint32_t len, uint8_t *output, uint8_t *block, uint8_t *k,
uint8_t *nonce, uint32_t ctr);
// Forward declaration from chacha20poly1305-ppc.c
extern void
Chacha20Poly1305_vsx_aead_encrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
extern uint32_t
Chacha20Poly1305_vsx_aead_decrypt(uint8_t *k, uint8_t *n1, uint32_t aadlen,
uint8_t *aad, uint32_t mlen, uint8_t *m,
uint8_t *cipher, uint8_t *mac);
SECStatus
ChaCha20_InitContext(ChaCha20Context *ctx, const unsigned char *key,
unsigned int keyLen, const unsigned char *nonce,
unsigned int nonceLen, PRUint32 ctr)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
if (keyLen != 32) {
PORT_SetError(SEC_ERROR_BAD_KEY);
return SECFailure;
}
if (nonceLen != 12) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
ctx->counter = ctr;
PORT_Memcpy(ctx->key, key, sizeof(ctx->key));
PORT_Memcpy(ctx->nonce, nonce, sizeof(ctx->nonce));
return SECSuccess;
#endif
}
ChaCha20Context *
ChaCha20_CreateContext(const unsigned char *key, unsigned int keyLen,
const unsigned char *nonce, unsigned int nonceLen,
PRUint32 ctr)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return NULL;
#else
ChaCha20Context *ctx;
ctx = PORT_New(ChaCha20Context);
if (ctx == NULL) {
return NULL;
}
if (ChaCha20_InitContext(ctx, key, keyLen, nonce, nonceLen, ctr) != SECSuccess) {
PORT_Free(ctx);
ctx = NULL;
}
return ctx;
#endif
}
void
ChaCha20_DestroyContext(ChaCha20Context *ctx, PRBool freeit)
{
#ifndef NSS_DISABLE_CHACHAPOLY
PORT_Memset(ctx, 0, sizeof(*ctx));
if (freeit) {
PORT_Free(ctx);
}
#endif
}
SECStatus
ChaCha20Poly1305_InitContext(ChaCha20Poly1305Context *ctx,
const unsigned char *key, unsigned int keyLen,
unsigned int tagLen)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
if (keyLen != 32) {
PORT_SetError(SEC_ERROR_BAD_KEY);
return SECFailure;
}
if (tagLen != 16) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
PORT_Memcpy(ctx->key, key, sizeof(ctx->key));
ctx->tagLen = tagLen;
return SECSuccess;
#endif
}
ChaCha20Poly1305Context *
ChaCha20Poly1305_CreateContext(const unsigned char *key, unsigned int keyLen,
unsigned int tagLen)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return NULL;
#else
ChaCha20Poly1305Context *ctx;
ctx = PORT_New(ChaCha20Poly1305Context);
if (ctx == NULL) {
return NULL;
}
if (ChaCha20Poly1305_InitContext(ctx, key, keyLen, tagLen) != SECSuccess) {
PORT_Free(ctx);
ctx = NULL;
}
return ctx;
#endif
}
void
ChaCha20Poly1305_DestroyContext(ChaCha20Poly1305Context *ctx, PRBool freeit)
{
#ifndef NSS_DISABLE_CHACHAPOLY
PORT_Memset(ctx, 0, sizeof(*ctx));
if (freeit) {
PORT_Free(ctx);
}
#endif
}
#ifndef NSS_DISABLE_CHACHAPOLY
void
ChaCha20Xor(uint8_t *output, uint8_t *block, uint32_t len, uint8_t *k,
uint8_t *nonce, uint32_t ctr)
{
#ifdef NSS_X64
if (ssse3_support() && sse4_1_support() && avx_support()) {
#ifdef NSS_DISABLE_AVX2
Hacl_Chacha20_Vec128_chacha20_encrypt_128(len, output, block, k, nonce, ctr);
#else
if (avx2_support()) {
Hacl_Chacha20_Vec256_chacha20_encrypt_256(len, output, block, k, nonce, ctr);
} else {
Hacl_Chacha20_Vec128_chacha20_encrypt_128(len, output, block, k, nonce, ctr);
}
#endif
} else
#elif defined(__powerpc64__) && defined(__LITTLE_ENDIAN__) && \
!defined(NSS_DISABLE_ALTIVEC) && !defined(NSS_DISABLE_CRYPTO_VSX)
if (ppc_crypto_support()) {
chacha20vsx(len, output, block, k, nonce, ctr);
} else
#endif
{
Hacl_Chacha20_chacha20_encrypt(len, output, block, k, nonce, ctr);
}
}
#endif /* NSS_DISABLE_CHACHAPOLY */
SECStatus
ChaCha20_Xor(unsigned char *output, const unsigned char *block, unsigned int len,
const unsigned char *k, const unsigned char *nonce, PRUint32 ctr)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
// ChaCha has a 64 octet block, with a 32-bit block counter.
if (sizeof(len) > 4) {
unsigned long long len_ull = len;
if (len_ull >= (1ULL << (6 + 32))) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
}
ChaCha20Xor(output, (uint8_t *)block, len, (uint8_t *)k,
(uint8_t *)nonce, ctr);
return SECSuccess;
#endif
}
SECStatus
ChaCha20Poly1305_Seal(const ChaCha20Poly1305Context *ctx, unsigned char *output,
unsigned int *outputLen, unsigned int maxOutputLen,
const unsigned char *input, unsigned int inputLen,
const unsigned char *nonce, unsigned int nonceLen,
const unsigned char *ad, unsigned int adLen)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
if (nonceLen != 12) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
// ChaCha has a 64 octet block, with a 32-bit block counter.
if (sizeof(inputLen) > 4) {
unsigned long long inputLen_ull = inputLen;
if (inputLen_ull >= (1ULL << (6 + 32))) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
}
if (maxOutputLen < inputLen + ctx->tagLen) {
PORT_SetError(SEC_ERROR_OUTPUT_LEN);
return SECFailure;
}
#ifdef NSS_X64
if (ssse3_support() && sse4_1_support() && avx_support()) {
#ifdef NSS_DISABLE_AVX2
Hacl_Chacha20Poly1305_128_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, output + inputLen);
#else
if (avx2_support()) {
Hacl_Chacha20Poly1305_256_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, output + inputLen);
} else {
Hacl_Chacha20Poly1305_128_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, output + inputLen);
}
#endif
} else
#elif defined(__powerpc64__) && defined(__LITTLE_ENDIAN__) && \
!defined(NSS_DISABLE_ALTIVEC) && !defined(NSS_DISABLE_CRYPTO_VSX)
if (ppc_crypto_support()) {
Chacha20Poly1305_vsx_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, output + inputLen);
} else
#endif
{
Hacl_Chacha20Poly1305_32_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, output + inputLen);
}
*outputLen = inputLen + ctx->tagLen;
return SECSuccess;
#endif
}
SECStatus
ChaCha20Poly1305_Open(const ChaCha20Poly1305Context *ctx, unsigned char *output,
unsigned int *outputLen, unsigned int maxOutputLen,
const unsigned char *input, unsigned int inputLen,
const unsigned char *nonce, unsigned int nonceLen,
const unsigned char *ad, unsigned int adLen)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
unsigned int ciphertextLen;
if (nonceLen != 12) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
if (inputLen < ctx->tagLen) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
ciphertextLen = inputLen - ctx->tagLen;
if (maxOutputLen < ciphertextLen) {
PORT_SetError(SEC_ERROR_OUTPUT_LEN);
return SECFailure;
}
// ChaCha has a 64 octet block, with a 32-bit block counter.
if (inputLen >= (1ULL << (6 + 32)) + ctx->tagLen) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
uint32_t res = 1;
#ifdef NSS_X64
if (ssse3_support() && sse4_1_support() && avx_support()) {
#ifdef NSS_DISABLE_AVX2
res = Hacl_Chacha20Poly1305_128_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)input + ciphertextLen);
#else
if (avx2_support()) {
res = Hacl_Chacha20Poly1305_256_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)input + ciphertextLen);
} else {
res = Hacl_Chacha20Poly1305_128_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)input + ciphertextLen);
}
#endif
} else
#elif defined(__powerpc64__) && defined(__LITTLE_ENDIAN__) && \
!defined(NSS_DISABLE_ALTIVEC) && !defined(NSS_DISABLE_CRYPTO_VSX)
if (ppc_crypto_support()) {
res = Chacha20Poly1305_vsx_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)input + ciphertextLen);
} else
#endif
{
res = Hacl_Chacha20Poly1305_32_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)input + ciphertextLen);
}
if (res) {
PORT_SetError(SEC_ERROR_BAD_DATA);
return SECFailure;
}
*outputLen = ciphertextLen;
return SECSuccess;
#endif
}
SECStatus
ChaCha20Poly1305_Encrypt(const ChaCha20Poly1305Context *ctx,
unsigned char *output, unsigned int *outputLen,
unsigned int maxOutputLen, const unsigned char *input,
unsigned int inputLen, const unsigned char *nonce,
unsigned int nonceLen, const unsigned char *ad,
unsigned int adLen, unsigned char *outTag)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
if (nonceLen != 12) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
// ChaCha has a 64 octet block, with a 32-bit block counter.
if (sizeof(inputLen) > 4) {
unsigned long long inputLen_ull = inputLen;
if (inputLen_ull >= (1ULL << (6 + 32))) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
}
if (maxOutputLen < inputLen) {
PORT_SetError(SEC_ERROR_OUTPUT_LEN);
return SECFailure;
}
#ifdef NSS_X64
if (ssse3_support() && sse4_1_support() && avx_support()) {
Hacl_Chacha20Poly1305_128_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, outTag);
} else
#elif defined(__powerpc64__) && defined(__LITTLE_ENDIAN__) && \
!defined(NSS_DISABLE_ALTIVEC) && !defined(NSS_DISABLE_CRYPTO_VSX)
if (ppc_crypto_support()) {
Chacha20Poly1305_vsx_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, outTag);
} else
#endif
{
Hacl_Chacha20Poly1305_32_aead_encrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, inputLen,
(uint8_t *)input, output, outTag);
}
*outputLen = inputLen;
return SECSuccess;
#endif
}
SECStatus
ChaCha20Poly1305_Decrypt(const ChaCha20Poly1305Context *ctx,
unsigned char *output, unsigned int *outputLen,
unsigned int maxOutputLen, const unsigned char *input,
unsigned int inputLen, const unsigned char *nonce,
unsigned int nonceLen, const unsigned char *ad,
unsigned int adLen, const unsigned char *tagIn)
{
#ifdef NSS_DISABLE_CHACHAPOLY
return SECFailure;
#else
unsigned int ciphertextLen;
if (nonceLen != 12) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
ciphertextLen = inputLen;
if (maxOutputLen < ciphertextLen) {
PORT_SetError(SEC_ERROR_OUTPUT_LEN);
return SECFailure;
}
// ChaCha has a 64 octet block, with a 32-bit block counter.
if (sizeof(inputLen) > 4) {
unsigned long long inputLen_ull = inputLen;
if (inputLen_ull >= (1ULL << (6 + 32))) {
PORT_SetError(SEC_ERROR_INPUT_LEN);
return SECFailure;
}
}
uint32_t res = 1;
#ifdef NSS_X64
if (ssse3_support() && sse4_1_support() && avx_support()) {
res = Hacl_Chacha20Poly1305_128_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)tagIn);
} else
#elif defined(__powerpc64__) && defined(__LITTLE_ENDIAN__) && \
!defined(NSS_DISABLE_ALTIVEC) && !defined(NSS_DISABLE_CRYPTO_VSX)
if (ppc_crypto_support()) {
res = Chacha20Poly1305_vsx_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)tagIn);
} else
#endif
{
res = Hacl_Chacha20Poly1305_32_aead_decrypt(
(uint8_t *)ctx->key, (uint8_t *)nonce, adLen, (uint8_t *)ad, ciphertextLen,
(uint8_t *)output, (uint8_t *)input, (uint8_t *)tagIn);
}
if (res) {
PORT_SetError(SEC_ERROR_BAD_DATA);
return SECFailure;
}
*outputLen = ciphertextLen;
return SECSuccess;
#endif
}
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