/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:4;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright The Mbed TLS Contributors │
│ │
│ Licensed under the Apache License, Version 2.0 (the "License"); │
│ you may not use this file except in compliance with the License. │
│ You may obtain a copy of the License at │
│ │
│ http://www.apache.org/licenses/LICENSE-2.0 │
│ │
│ Unless required by applicable law or agreed to in writing, software │
│ distributed under the License is distributed on an "AS IS" BASIS, │
│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
│ See the License for the specific language governing permissions and │
│ limitations under the License. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/bits.h"
#include "libc/stdio/stdio.h"
#include "third_party/mbedtls/chacha20.h"
#include "third_party/mbedtls/common.h"
#include "third_party/mbedtls/error.h"
#include "third_party/mbedtls/platform.h"
asm(".ident\t\"\\n\\n\
Mbed TLS (Apache 2.0)\\n\
Copyright ARM Limited\\n\
Copyright Mbed TLS Contributors\"");
asm(".include \"libc/disclaimer.inc\"");
/* clang-format off */
/* Parameter validation macros */
#define CHACHA20_VALIDATE_RET( cond ) \
MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA )
#define CHACHA20_VALIDATE( cond ) \
MBEDTLS_INTERNAL_VALIDATE( cond )
#define BYTES_TO_U32_LE( data, offset ) READ32LE((data) + (offset))
#define ROTL32( value, amount ) \
( (uint32_t) ( (value) << (amount) ) | ( (value) >> ( 32 - (amount) ) ) )
#define CHACHA20_CTR_INDEX ( 12U )
#define CHACHA20_BLOCK_SIZE_BYTES ( 4U * 16U )
/**
* \brief Generates a keystream block.
*
* \param s The initial ChaCha20 state (key, nonce, counter).
* \param k Generated keystream bytes are written to this buffer.
*/
static void chacha20_block( const uint32_t s[16], unsigned char k[64] )
{
int i;
uint8_t *p;
uint32_t A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P;
A = s[ 0];
B = s[ 1];
C = s[ 2];
D = s[ 3];
E = s[ 4];
F = s[ 5];
G = s[ 6];
H = s[ 7];
I = s[ 8];
J = s[ 9];
K = s[10];
L = s[11];
M = s[12];
N = s[13];
O = s[14];
P = s[15];
for (i = 0; i < 10; ++i) {
A += E; M = ROTL32(M ^ A, 16);
B += F; N = ROTL32(N ^ B, 16);
C += G; O = ROTL32(O ^ C, 16);
D += H; P = ROTL32(P ^ D, 16);
I += M; E = ROTL32(E ^ I, 12);
J += N; F = ROTL32(F ^ J, 12);
K += O; G = ROTL32(G ^ K, 12);
L += P; H = ROTL32(H ^ L, 12);
A += E; M = ROTL32(M ^ A, 8);
B += F; N = ROTL32(N ^ B, 8);
C += G; O = ROTL32(O ^ C, 8);
D += H; P = ROTL32(P ^ D, 8);
I += M; E = ROTL32(E ^ I, 7);
J += N; F = ROTL32(F ^ J, 7);
K += O; G = ROTL32(G ^ K, 7);
L += P; H = ROTL32(H ^ L, 7);
A += F; P = ROTL32(P ^ A, 16);
B += G; M = ROTL32(M ^ B, 16);
C += H; N = ROTL32(N ^ C, 16);
D += E; O = ROTL32(O ^ D, 16);
K += P; F = ROTL32(F ^ K, 12);
L += M; G = ROTL32(G ^ L, 12);
I += N; H = ROTL32(H ^ I, 12);
J += O; E = ROTL32(E ^ J, 12);
A += F; P = ROTL32(P ^ A, 8);
B += G; M = ROTL32(M ^ B, 8);
C += H; N = ROTL32(N ^ C, 8);
D += E; O = ROTL32(O ^ D, 8);
K += P; F = ROTL32(F ^ K, 7);
L += M; G = ROTL32(G ^ L, 7);
I += N; H = ROTL32(H ^ I, 7);
J += O; E = ROTL32(E ^ J, 7);
}
p = k;
A += s[ 0]; p = WRITE32LE(p, A);
B += s[ 1]; p = WRITE32LE(p, B);
C += s[ 2]; p = WRITE32LE(p, C);
D += s[ 3]; p = WRITE32LE(p, D);
E += s[ 4]; p = WRITE32LE(p, E);
F += s[ 5]; p = WRITE32LE(p, F);
G += s[ 6]; p = WRITE32LE(p, G);
H += s[ 7]; p = WRITE32LE(p, H);
I += s[ 8]; p = WRITE32LE(p, I);
J += s[ 9]; p = WRITE32LE(p, J);
K += s[10]; p = WRITE32LE(p, K);
L += s[11]; p = WRITE32LE(p, L);
M += s[12]; p = WRITE32LE(p, M);
N += s[13]; p = WRITE32LE(p, N);
O += s[14]; p = WRITE32LE(p, O);
P += s[15]; p = WRITE32LE(p, P);
}
/**
* \brief This function initializes the specified ChaCha20 context.
*
* It must be the first API called before using
* the context.
*
* It is usually followed by calls to
* \c mbedtls_chacha20_setkey() and
* \c mbedtls_chacha20_starts(), then one or more calls to
* to \c mbedtls_chacha20_update(), and finally to
* \c mbedtls_chacha20_free().
*
* \param ctx The ChaCha20 context to initialize.
* This must not be \c NULL.
*/
void mbedtls_chacha20_init( mbedtls_chacha20_context *ctx )
{
CHACHA20_VALIDATE( ctx != NULL );
mbedtls_platform_zeroize( ctx->state, sizeof( ctx->state ) );
mbedtls_platform_zeroize( ctx->keystream8, sizeof( ctx->keystream8 ) );
/* Initially, there's no keystream bytes available */
ctx->keystream_bytes_used = CHACHA20_BLOCK_SIZE_BYTES;
}
/**
* \brief This function releases and clears the specified
* ChaCha20 context.
*
* \param ctx The ChaCha20 context to clear. This may be \c NULL,
* in which case this function is a no-op. If it is not
* \c NULL, it must point to an initialized context.
*
*/
void mbedtls_chacha20_free( mbedtls_chacha20_context *ctx )
{
if( ctx != NULL )
{
mbedtls_platform_zeroize( ctx, sizeof( mbedtls_chacha20_context ) );
}
}
/**
* \brief This function sets the encryption/decryption key.
*
* \note After using this function, you must also call
* \c mbedtls_chacha20_starts() to set a nonce before you
* start encrypting/decrypting data with
* \c mbedtls_chacha_update().
*
* \param ctx The ChaCha20 context to which the key should be bound.
* It must be initialized.
* \param key The encryption/decryption key. This must be \c 32 Bytes
* in length.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA if ctx or key is NULL.
*/
int mbedtls_chacha20_setkey( mbedtls_chacha20_context *ctx,
const unsigned char key[32] )
{
CHACHA20_VALIDATE_RET( ctx != NULL );
CHACHA20_VALIDATE_RET( key != NULL );
/* ChaCha20 constants - the string "expand 32-byte k" */
ctx->state[0] = 0x61707865;
ctx->state[1] = 0x3320646e;
ctx->state[2] = 0x79622d32;
ctx->state[3] = 0x6b206574;
/* Set key */
ctx->state[4] = BYTES_TO_U32_LE( key, 0 );
ctx->state[5] = BYTES_TO_U32_LE( key, 4 );
ctx->state[6] = BYTES_TO_U32_LE( key, 8 );
ctx->state[7] = BYTES_TO_U32_LE( key, 12 );
ctx->state[8] = BYTES_TO_U32_LE( key, 16 );
ctx->state[9] = BYTES_TO_U32_LE( key, 20 );
ctx->state[10] = BYTES_TO_U32_LE( key, 24 );
ctx->state[11] = BYTES_TO_U32_LE( key, 28 );
return( 0 );
}
/**
* \brief This function sets the nonce and initial counter value.
*
* \note A ChaCha20 context can be re-used with the same key by
* calling this function to change the nonce.
*
* \warning You must never use the same nonce twice with the same key.
* This would void any confidentiality guarantees for the
* messages encrypted with the same nonce and key.
*
* \param ctx The ChaCha20 context to which the nonce should be bound.
* It must be initialized and bound to a key.
* \param nonce The nonce. This must be \c 12 Bytes in size.
* \param counter The initial counter value. This is usually \c 0.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA if ctx or nonce is
* NULL.
*/
int mbedtls_chacha20_starts( mbedtls_chacha20_context* ctx,
const unsigned char nonce[12],
uint32_t counter )
{
CHACHA20_VALIDATE_RET( ctx != NULL );
CHACHA20_VALIDATE_RET( nonce != NULL );
/* Counter */
ctx->state[12] = counter;
/* Nonce */
ctx->state[13] = BYTES_TO_U32_LE( nonce, 0 );
ctx->state[14] = BYTES_TO_U32_LE( nonce, 4 );
ctx->state[15] = BYTES_TO_U32_LE( nonce, 8 );
mbedtls_platform_zeroize( ctx->keystream8, sizeof( ctx->keystream8 ) );
/* Initially, there's no keystream bytes available */
ctx->keystream_bytes_used = CHACHA20_BLOCK_SIZE_BYTES;
return( 0 );
}
/**
* \brief This function encrypts or decrypts data.
*
* Since ChaCha20 is a stream cipher, the same operation is
* used for encrypting and decrypting data.
*
* \note The \p input and \p output pointers must either be equal or
* point to non-overlapping buffers.
*
* \note \c mbedtls_chacha20_setkey() and
* \c mbedtls_chacha20_starts() must be called at least once
* to setup the context before this function can be called.
*
* \note This function can be called multiple times in a row in
* order to encrypt of decrypt data piecewise with the same
* key and nonce.
*
* \param ctx The ChaCha20 context to use for encryption or decryption.
* It must be initialized and bound to a key and nonce.
* \param size The length of the input data in Bytes.
* \param input The buffer holding the input data.
* This pointer can be \c NULL if `size == 0`.
* \param output The buffer holding the output data.
* This must be able to hold \p size Bytes.
* This pointer can be \c NULL if `size == 0`.
*
* \return \c 0 on success.
* \return A negative error code on failure.
*/
int mbedtls_chacha20_update( mbedtls_chacha20_context *ctx,
size_t size,
const unsigned char *input,
unsigned char *output )
{
size_t offset = 0U;
size_t i;
CHACHA20_VALIDATE_RET( ctx != NULL );
CHACHA20_VALIDATE_RET( size == 0 || input != NULL );
CHACHA20_VALIDATE_RET( size == 0 || output != NULL );
/* Use leftover keystream bytes, if available */
while( size > 0U && ctx->keystream_bytes_used < CHACHA20_BLOCK_SIZE_BYTES )
{
output[offset] = input[offset]
^ ctx->keystream8[ctx->keystream_bytes_used];
ctx->keystream_bytes_used++;
offset++;
size--;
}
/* Process full blocks */
while( size >= CHACHA20_BLOCK_SIZE_BYTES )
{
/* Generate new keystream block and increment counter */
chacha20_block( ctx->state, ctx->keystream8 );
ctx->state[CHACHA20_CTR_INDEX]++;
for( i = 0U; i < 64U; i += 8U )
{
output[offset + i ] = input[offset + i ] ^ ctx->keystream8[i ];
output[offset + i+1] = input[offset + i+1] ^ ctx->keystream8[i+1];
output[offset + i+2] = input[offset + i+2] ^ ctx->keystream8[i+2];
output[offset + i+3] = input[offset + i+3] ^ ctx->keystream8[i+3];
output[offset + i+4] = input[offset + i+4] ^ ctx->keystream8[i+4];
output[offset + i+5] = input[offset + i+5] ^ ctx->keystream8[i+5];
output[offset + i+6] = input[offset + i+6] ^ ctx->keystream8[i+6];
output[offset + i+7] = input[offset + i+7] ^ ctx->keystream8[i+7];
}
offset += CHACHA20_BLOCK_SIZE_BYTES;
size -= CHACHA20_BLOCK_SIZE_BYTES;
}
/* Last (partial) block */
if( size > 0U )
{
/* Generate new keystream block and increment counter */
chacha20_block( ctx->state, ctx->keystream8 );
ctx->state[CHACHA20_CTR_INDEX]++;
for( i = 0U; i < size; i++)
{
output[offset + i] = input[offset + i] ^ ctx->keystream8[i];
}
ctx->keystream_bytes_used = size;
}
return( 0 );
}
/**
* \brief This function encrypts or decrypts data with ChaCha20 and
* the given key and nonce.
*
* Since ChaCha20 is a stream cipher, the same operation is
* used for encrypting and decrypting data.
*
* \warning You must never use the same (key, nonce) pair more than
* once. This would void any confidentiality guarantees for
* the messages encrypted with the same nonce and key.
*
* \note The \p input and \p output pointers must either be equal or
* point to non-overlapping buffers.
*
* \param key The encryption/decryption key.
* This must be \c 32 Bytes in length.
* \param nonce The nonce. This must be \c 12 Bytes in size.
* \param counter The initial counter value. This is usually \c 0.
* \param size The length of the input data in Bytes.
* \param input The buffer holding the input data.
* This pointer can be \c NULL if `size == 0`.
* \param output The buffer holding the output data.
* This must be able to hold \p size Bytes.
* This pointer can be \c NULL if `size == 0`.
*
* \return \c 0 on success.
* \return A negative error code on failure.
*/
int mbedtls_chacha20_crypt( const unsigned char key[32],
const unsigned char nonce[12],
uint32_t counter,
size_t data_len,
const unsigned char* input,
unsigned char* output )
{
mbedtls_chacha20_context ctx;
int ret = MBEDTLS_ERR_THIS_CORRUPTION;
CHACHA20_VALIDATE_RET( key != NULL );
CHACHA20_VALIDATE_RET( nonce != NULL );
CHACHA20_VALIDATE_RET( data_len == 0 || input != NULL );
CHACHA20_VALIDATE_RET( data_len == 0 || output != NULL );
mbedtls_chacha20_init( &ctx );
ret = mbedtls_chacha20_setkey( &ctx, key );
if( ret != 0 )
goto cleanup;
ret = mbedtls_chacha20_starts( &ctx, nonce, counter );
if( ret != 0 )
goto cleanup;
ret = mbedtls_chacha20_update( &ctx, data_len, input, output );
cleanup:
mbedtls_chacha20_free( &ctx );
return( ret );
}
#if defined(MBEDTLS_SELF_TEST)
static const unsigned char test_keys[2][32] =
{
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
},
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01
}
};
static const unsigned char test_nonces[2][12] =
{
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00
},
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x02
}
};
static const uint32_t test_counters[2] =
{
0U,
1U
};
static const unsigned char test_input[2][375] =
{
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
},
{
0x41, 0x6e, 0x79, 0x20, 0x73, 0x75, 0x62, 0x6d,
0x69, 0x73, 0x73, 0x69, 0x6f, 0x6e, 0x20, 0x74,
0x6f, 0x20, 0x74, 0x68, 0x65, 0x20, 0x49, 0x45,
0x54, 0x46, 0x20, 0x69, 0x6e, 0x74, 0x65, 0x6e,
0x64, 0x65, 0x64, 0x20, 0x62, 0x79, 0x20, 0x74,
0x68, 0x65, 0x20, 0x43, 0x6f, 0x6e, 0x74, 0x72,
0x69, 0x62, 0x75, 0x74, 0x6f, 0x72, 0x20, 0x66,
0x6f, 0x72, 0x20, 0x70, 0x75, 0x62, 0x6c, 0x69,
0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x61,
0x73, 0x20, 0x61, 0x6c, 0x6c, 0x20, 0x6f, 0x72,
0x20, 0x70, 0x61, 0x72, 0x74, 0x20, 0x6f, 0x66,
0x20, 0x61, 0x6e, 0x20, 0x49, 0x45, 0x54, 0x46,
0x20, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65,
0x74, 0x2d, 0x44, 0x72, 0x61, 0x66, 0x74, 0x20,
0x6f, 0x72, 0x20, 0x52, 0x46, 0x43, 0x20, 0x61,
0x6e, 0x64, 0x20, 0x61, 0x6e, 0x79, 0x20, 0x73,
0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e, 0x74,
0x20, 0x6d, 0x61, 0x64, 0x65, 0x20, 0x77, 0x69,
0x74, 0x68, 0x69, 0x6e, 0x20, 0x74, 0x68, 0x65,
0x20, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74,
0x20, 0x6f, 0x66, 0x20, 0x61, 0x6e, 0x20, 0x49,
0x45, 0x54, 0x46, 0x20, 0x61, 0x63, 0x74, 0x69,
0x76, 0x69, 0x74, 0x79, 0x20, 0x69, 0x73, 0x20,
0x63, 0x6f, 0x6e, 0x73, 0x69, 0x64, 0x65, 0x72,
0x65, 0x64, 0x20, 0x61, 0x6e, 0x20, 0x22, 0x49,
0x45, 0x54, 0x46, 0x20, 0x43, 0x6f, 0x6e, 0x74,
0x72, 0x69, 0x62, 0x75, 0x74, 0x69, 0x6f, 0x6e,
0x22, 0x2e, 0x20, 0x53, 0x75, 0x63, 0x68, 0x20,
0x73, 0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e,
0x74, 0x73, 0x20, 0x69, 0x6e, 0x63, 0x6c, 0x75,
0x64, 0x65, 0x20, 0x6f, 0x72, 0x61, 0x6c, 0x20,
0x73, 0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e,
0x74, 0x73, 0x20, 0x69, 0x6e, 0x20, 0x49, 0x45,
0x54, 0x46, 0x20, 0x73, 0x65, 0x73, 0x73, 0x69,
0x6f, 0x6e, 0x73, 0x2c, 0x20, 0x61, 0x73, 0x20,
0x77, 0x65, 0x6c, 0x6c, 0x20, 0x61, 0x73, 0x20,
0x77, 0x72, 0x69, 0x74, 0x74, 0x65, 0x6e, 0x20,
0x61, 0x6e, 0x64, 0x20, 0x65, 0x6c, 0x65, 0x63,
0x74, 0x72, 0x6f, 0x6e, 0x69, 0x63, 0x20, 0x63,
0x6f, 0x6d, 0x6d, 0x75, 0x6e, 0x69, 0x63, 0x61,
0x74, 0x69, 0x6f, 0x6e, 0x73, 0x20, 0x6d, 0x61,
0x64, 0x65, 0x20, 0x61, 0x74, 0x20, 0x61, 0x6e,
0x79, 0x20, 0x74, 0x69, 0x6d, 0x65, 0x20, 0x6f,
0x72, 0x20, 0x70, 0x6c, 0x61, 0x63, 0x65, 0x2c,
0x20, 0x77, 0x68, 0x69, 0x63, 0x68, 0x20, 0x61,
0x72, 0x65, 0x20, 0x61, 0x64, 0x64, 0x72, 0x65,
0x73, 0x73, 0x65, 0x64, 0x20, 0x74, 0x6f
}
};
static const unsigned char test_output[2][375] =
{
{
0x76, 0xb8, 0xe0, 0xad, 0xa0, 0xf1, 0x3d, 0x90,
0x40, 0x5d, 0x6a, 0xe5, 0x53, 0x86, 0xbd, 0x28,
0xbd, 0xd2, 0x19, 0xb8, 0xa0, 0x8d, 0xed, 0x1a,
0xa8, 0x36, 0xef, 0xcc, 0x8b, 0x77, 0x0d, 0xc7,
0xda, 0x41, 0x59, 0x7c, 0x51, 0x57, 0x48, 0x8d,
0x77, 0x24, 0xe0, 0x3f, 0xb8, 0xd8, 0x4a, 0x37,
0x6a, 0x43, 0xb8, 0xf4, 0x15, 0x18, 0xa1, 0x1c,
0xc3, 0x87, 0xb6, 0x69, 0xb2, 0xee, 0x65, 0x86
},
{
0xa3, 0xfb, 0xf0, 0x7d, 0xf3, 0xfa, 0x2f, 0xde,
0x4f, 0x37, 0x6c, 0xa2, 0x3e, 0x82, 0x73, 0x70,
0x41, 0x60, 0x5d, 0x9f, 0x4f, 0x4f, 0x57, 0xbd,
0x8c, 0xff, 0x2c, 0x1d, 0x4b, 0x79, 0x55, 0xec,
0x2a, 0x97, 0x94, 0x8b, 0xd3, 0x72, 0x29, 0x15,
0xc8, 0xf3, 0xd3, 0x37, 0xf7, 0xd3, 0x70, 0x05,
0x0e, 0x9e, 0x96, 0xd6, 0x47, 0xb7, 0xc3, 0x9f,
0x56, 0xe0, 0x31, 0xca, 0x5e, 0xb6, 0x25, 0x0d,
0x40, 0x42, 0xe0, 0x27, 0x85, 0xec, 0xec, 0xfa,
0x4b, 0x4b, 0xb5, 0xe8, 0xea, 0xd0, 0x44, 0x0e,
0x20, 0xb6, 0xe8, 0xdb, 0x09, 0xd8, 0x81, 0xa7,
0xc6, 0x13, 0x2f, 0x42, 0x0e, 0x52, 0x79, 0x50,
0x42, 0xbd, 0xfa, 0x77, 0x73, 0xd8, 0xa9, 0x05,
0x14, 0x47, 0xb3, 0x29, 0x1c, 0xe1, 0x41, 0x1c,
0x68, 0x04, 0x65, 0x55, 0x2a, 0xa6, 0xc4, 0x05,
0xb7, 0x76, 0x4d, 0x5e, 0x87, 0xbe, 0xa8, 0x5a,
0xd0, 0x0f, 0x84, 0x49, 0xed, 0x8f, 0x72, 0xd0,
0xd6, 0x62, 0xab, 0x05, 0x26, 0x91, 0xca, 0x66,
0x42, 0x4b, 0xc8, 0x6d, 0x2d, 0xf8, 0x0e, 0xa4,
0x1f, 0x43, 0xab, 0xf9, 0x37, 0xd3, 0x25, 0x9d,
0xc4, 0xb2, 0xd0, 0xdf, 0xb4, 0x8a, 0x6c, 0x91,
0x39, 0xdd, 0xd7, 0xf7, 0x69, 0x66, 0xe9, 0x28,
0xe6, 0x35, 0x55, 0x3b, 0xa7, 0x6c, 0x5c, 0x87,
0x9d, 0x7b, 0x35, 0xd4, 0x9e, 0xb2, 0xe6, 0x2b,
0x08, 0x71, 0xcd, 0xac, 0x63, 0x89, 0x39, 0xe2,
0x5e, 0x8a, 0x1e, 0x0e, 0xf9, 0xd5, 0x28, 0x0f,
0xa8, 0xca, 0x32, 0x8b, 0x35, 0x1c, 0x3c, 0x76,
0x59, 0x89, 0xcb, 0xcf, 0x3d, 0xaa, 0x8b, 0x6c,
0xcc, 0x3a, 0xaf, 0x9f, 0x39, 0x79, 0xc9, 0x2b,
0x37, 0x20, 0xfc, 0x88, 0xdc, 0x95, 0xed, 0x84,
0xa1, 0xbe, 0x05, 0x9c, 0x64, 0x99, 0xb9, 0xfd,
0xa2, 0x36, 0xe7, 0xe8, 0x18, 0xb0, 0x4b, 0x0b,
0xc3, 0x9c, 0x1e, 0x87, 0x6b, 0x19, 0x3b, 0xfe,
0x55, 0x69, 0x75, 0x3f, 0x88, 0x12, 0x8c, 0xc0,
0x8a, 0xaa, 0x9b, 0x63, 0xd1, 0xa1, 0x6f, 0x80,
0xef, 0x25, 0x54, 0xd7, 0x18, 0x9c, 0x41, 0x1f,
0x58, 0x69, 0xca, 0x52, 0xc5, 0xb8, 0x3f, 0xa3,
0x6f, 0xf2, 0x16, 0xb9, 0xc1, 0xd3, 0x00, 0x62,
0xbe, 0xbc, 0xfd, 0x2d, 0xc5, 0xbc, 0xe0, 0x91,
0x19, 0x34, 0xfd, 0xa7, 0x9a, 0x86, 0xf6, 0xe6,
0x98, 0xce, 0xd7, 0x59, 0xc3, 0xff, 0x9b, 0x64,
0x77, 0x33, 0x8f, 0x3d, 0xa4, 0xf9, 0xcd, 0x85,
0x14, 0xea, 0x99, 0x82, 0xcc, 0xaf, 0xb3, 0x41,
0xb2, 0x38, 0x4d, 0xd9, 0x02, 0xf3, 0xd1, 0xab,
0x7a, 0xc6, 0x1d, 0xd2, 0x9c, 0x6f, 0x21, 0xba,
0x5b, 0x86, 0x2f, 0x37, 0x30, 0xe3, 0x7c, 0xfd,
0xc4, 0xfd, 0x80, 0x6c, 0x22, 0xf2, 0x21
}
};
static const size_t test_lengths[2] =
{
64U,
375U
};
/* Make sure no other definition is already present. */
#undef ASSERT
#define ASSERT( cond, args ) \
do \
{ \
if( ! ( cond ) ) \
{ \
if( verbose != 0 ) \
mbedtls_printf args; \
\
return( -1 ); \
} \
} \
while( 0 )
/**
* \brief The ChaCha20 checkup routine.
*
* \return \c 0 on success.
* \return \c 1 on failure.
*/
int mbedtls_chacha20_self_test( int verbose )
{
unsigned char output[381];
unsigned i;
int ret = MBEDTLS_ERR_THIS_CORRUPTION;
for( i = 0U; i < 2U; i++ )
{
if( verbose != 0 )
mbedtls_printf( " ChaCha20 test %u ", i );
ret = mbedtls_chacha20_crypt( test_keys[i],
test_nonces[i],
test_counters[i],
test_lengths[i],
test_input[i],
output );
ASSERT( 0 == ret, ( "error code: %i\n", ret ) );
ASSERT( 0 == timingsafe_bcmp( output, test_output[i], test_lengths[i] ),
( "failed (output)\n" ) );
if( verbose != 0 )
mbedtls_printf( "passed\n" );
}
if( verbose != 0 )
mbedtls_printf( "\n" );
return( 0 );
}
#endif /* MBEDTLS_SELF_TEST */