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Diffstat (limited to 'lib/mbedtls-2.27.0/library/poly1305.c')
-rw-r--r--lib/mbedtls-2.27.0/library/poly1305.c557
1 files changed, 0 insertions, 557 deletions
diff --git a/lib/mbedtls-2.27.0/library/poly1305.c b/lib/mbedtls-2.27.0/library/poly1305.c
deleted file mode 100644
index 492d145..0000000
--- a/lib/mbedtls-2.27.0/library/poly1305.c
+++ /dev/null
@@ -1,557 +0,0 @@
-/**
- * \file poly1305.c
- *
- * \brief Poly1305 authentication algorithm.
- *
- * Copyright The Mbed TLS Contributors
- * SPDX-License-Identifier: Apache-2.0
- *
- * 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 "common.h"
-
-#if defined(MBEDTLS_POLY1305_C)
-
-#include "mbedtls/poly1305.h"
-#include "mbedtls/platform_util.h"
-#include "mbedtls/error.h"
-
-#include <string.h>
-
-#if defined(MBEDTLS_SELF_TEST)
-#if defined(MBEDTLS_PLATFORM_C)
-#include "mbedtls/platform.h"
-#else
-#include <stdio.h>
-#define mbedtls_printf printf
-#endif /* MBEDTLS_PLATFORM_C */
-#endif /* MBEDTLS_SELF_TEST */
-
-#if !defined(MBEDTLS_POLY1305_ALT)
-
-#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
- !defined(inline) && !defined(__cplusplus)
-#define inline __inline
-#endif
-
-/* Parameter validation macros */
-#define POLY1305_VALIDATE_RET( cond ) \
- MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA )
-#define POLY1305_VALIDATE( cond ) \
- MBEDTLS_INTERNAL_VALIDATE( cond )
-
-#define POLY1305_BLOCK_SIZE_BYTES ( 16U )
-
-#define BYTES_TO_U32_LE( data, offset ) \
- ( (uint32_t) (data)[offset] \
- | (uint32_t) ( (uint32_t) (data)[( offset ) + 1] << 8 ) \
- | (uint32_t) ( (uint32_t) (data)[( offset ) + 2] << 16 ) \
- | (uint32_t) ( (uint32_t) (data)[( offset ) + 3] << 24 ) \
- )
-
-/*
- * Our implementation is tuned for 32-bit platforms with a 64-bit multiplier.
- * However we provided an alternative for platforms without such a multiplier.
- */
-#if defined(MBEDTLS_NO_64BIT_MULTIPLICATION)
-static uint64_t mul64( uint32_t a, uint32_t b )
-{
- /* a = al + 2**16 ah, b = bl + 2**16 bh */
- const uint16_t al = (uint16_t) a;
- const uint16_t bl = (uint16_t) b;
- const uint16_t ah = a >> 16;
- const uint16_t bh = b >> 16;
-
- /* ab = al*bl + 2**16 (ah*bl + bl*bh) + 2**32 ah*bh */
- const uint32_t lo = (uint32_t) al * bl;
- const uint64_t me = (uint64_t)( (uint32_t) ah * bl ) + (uint32_t) al * bh;
- const uint32_t hi = (uint32_t) ah * bh;
-
- return( lo + ( me << 16 ) + ( (uint64_t) hi << 32 ) );
-}
-#else
-static inline uint64_t mul64( uint32_t a, uint32_t b )
-{
- return( (uint64_t) a * b );
-}
-#endif
-
-
-/**
- * \brief Process blocks with Poly1305.
- *
- * \param ctx The Poly1305 context.
- * \param nblocks Number of blocks to process. Note that this
- * function only processes full blocks.
- * \param input Buffer containing the input block(s).
- * \param needs_padding Set to 0 if the padding bit has already been
- * applied to the input data before calling this
- * function. Otherwise, set this parameter to 1.
- */
-static void poly1305_process( mbedtls_poly1305_context *ctx,
- size_t nblocks,
- const unsigned char *input,
- uint32_t needs_padding )
-{
- uint64_t d0, d1, d2, d3;
- uint32_t acc0, acc1, acc2, acc3, acc4;
- uint32_t r0, r1, r2, r3;
- uint32_t rs1, rs2, rs3;
- size_t offset = 0U;
- size_t i;
-
- r0 = ctx->r[0];
- r1 = ctx->r[1];
- r2 = ctx->r[2];
- r3 = ctx->r[3];
-
- rs1 = r1 + ( r1 >> 2U );
- rs2 = r2 + ( r2 >> 2U );
- rs3 = r3 + ( r3 >> 2U );
-
- acc0 = ctx->acc[0];
- acc1 = ctx->acc[1];
- acc2 = ctx->acc[2];
- acc3 = ctx->acc[3];
- acc4 = ctx->acc[4];
-
- /* Process full blocks */
- for( i = 0U; i < nblocks; i++ )
- {
- /* The input block is treated as a 128-bit little-endian integer */
- d0 = BYTES_TO_U32_LE( input, offset + 0 );
- d1 = BYTES_TO_U32_LE( input, offset + 4 );
- d2 = BYTES_TO_U32_LE( input, offset + 8 );
- d3 = BYTES_TO_U32_LE( input, offset + 12 );
-
- /* Compute: acc += (padded) block as a 130-bit integer */
- d0 += (uint64_t) acc0;
- d1 += (uint64_t) acc1 + ( d0 >> 32U );
- d2 += (uint64_t) acc2 + ( d1 >> 32U );
- d3 += (uint64_t) acc3 + ( d2 >> 32U );
- acc0 = (uint32_t) d0;
- acc1 = (uint32_t) d1;
- acc2 = (uint32_t) d2;
- acc3 = (uint32_t) d3;
- acc4 += (uint32_t) ( d3 >> 32U ) + needs_padding;
-
- /* Compute: acc *= r */
- d0 = mul64( acc0, r0 ) +
- mul64( acc1, rs3 ) +
- mul64( acc2, rs2 ) +
- mul64( acc3, rs1 );
- d1 = mul64( acc0, r1 ) +
- mul64( acc1, r0 ) +
- mul64( acc2, rs3 ) +
- mul64( acc3, rs2 ) +
- mul64( acc4, rs1 );
- d2 = mul64( acc0, r2 ) +
- mul64( acc1, r1 ) +
- mul64( acc2, r0 ) +
- mul64( acc3, rs3 ) +
- mul64( acc4, rs2 );
- d3 = mul64( acc0, r3 ) +
- mul64( acc1, r2 ) +
- mul64( acc2, r1 ) +
- mul64( acc3, r0 ) +
- mul64( acc4, rs3 );
- acc4 *= r0;
-
- /* Compute: acc %= (2^130 - 5) (partial remainder) */
- d1 += ( d0 >> 32 );
- d2 += ( d1 >> 32 );
- d3 += ( d2 >> 32 );
- acc0 = (uint32_t) d0;
- acc1 = (uint32_t) d1;
- acc2 = (uint32_t) d2;
- acc3 = (uint32_t) d3;
- acc4 = (uint32_t) ( d3 >> 32 ) + acc4;
-
- d0 = (uint64_t) acc0 + ( acc4 >> 2 ) + ( acc4 & 0xFFFFFFFCU );
- acc4 &= 3U;
- acc0 = (uint32_t) d0;
- d0 = (uint64_t) acc1 + ( d0 >> 32U );
- acc1 = (uint32_t) d0;
- d0 = (uint64_t) acc2 + ( d0 >> 32U );
- acc2 = (uint32_t) d0;
- d0 = (uint64_t) acc3 + ( d0 >> 32U );
- acc3 = (uint32_t) d0;
- d0 = (uint64_t) acc4 + ( d0 >> 32U );
- acc4 = (uint32_t) d0;
-
- offset += POLY1305_BLOCK_SIZE_BYTES;
- }
-
- ctx->acc[0] = acc0;
- ctx->acc[1] = acc1;
- ctx->acc[2] = acc2;
- ctx->acc[3] = acc3;
- ctx->acc[4] = acc4;
-}
-
-/**
- * \brief Compute the Poly1305 MAC
- *
- * \param ctx The Poly1305 context.
- * \param mac The buffer to where the MAC is written. Must be
- * big enough to contain the 16-byte MAC.
- */
-static void poly1305_compute_mac( const mbedtls_poly1305_context *ctx,
- unsigned char mac[16] )
-{
- uint64_t d;
- uint32_t g0, g1, g2, g3, g4;
- uint32_t acc0, acc1, acc2, acc3, acc4;
- uint32_t mask;
- uint32_t mask_inv;
-
- acc0 = ctx->acc[0];
- acc1 = ctx->acc[1];
- acc2 = ctx->acc[2];
- acc3 = ctx->acc[3];
- acc4 = ctx->acc[4];
-
- /* Before adding 's' we ensure that the accumulator is mod 2^130 - 5.
- * We do this by calculating acc - (2^130 - 5), then checking if
- * the 131st bit is set. If it is, then reduce: acc -= (2^130 - 5)
- */
-
- /* Calculate acc + -(2^130 - 5) */
- d = ( (uint64_t) acc0 + 5U );
- g0 = (uint32_t) d;
- d = ( (uint64_t) acc1 + ( d >> 32 ) );
- g1 = (uint32_t) d;
- d = ( (uint64_t) acc2 + ( d >> 32 ) );
- g2 = (uint32_t) d;
- d = ( (uint64_t) acc3 + ( d >> 32 ) );
- g3 = (uint32_t) d;
- g4 = acc4 + (uint32_t) ( d >> 32U );
-
- /* mask == 0xFFFFFFFF if 131st bit is set, otherwise mask == 0 */
- mask = (uint32_t) 0U - ( g4 >> 2U );
- mask_inv = ~mask;
-
- /* If 131st bit is set then acc=g, otherwise, acc is unmodified */
- acc0 = ( acc0 & mask_inv ) | ( g0 & mask );
- acc1 = ( acc1 & mask_inv ) | ( g1 & mask );
- acc2 = ( acc2 & mask_inv ) | ( g2 & mask );
- acc3 = ( acc3 & mask_inv ) | ( g3 & mask );
-
- /* Add 's' */
- d = (uint64_t) acc0 + ctx->s[0];
- acc0 = (uint32_t) d;
- d = (uint64_t) acc1 + ctx->s[1] + ( d >> 32U );
- acc1 = (uint32_t) d;
- d = (uint64_t) acc2 + ctx->s[2] + ( d >> 32U );
- acc2 = (uint32_t) d;
- acc3 += ctx->s[3] + (uint32_t) ( d >> 32U );
-
- /* Compute MAC (128 least significant bits of the accumulator) */
- mac[ 0] = (unsigned char)( acc0 );
- mac[ 1] = (unsigned char)( acc0 >> 8 );
- mac[ 2] = (unsigned char)( acc0 >> 16 );
- mac[ 3] = (unsigned char)( acc0 >> 24 );
- mac[ 4] = (unsigned char)( acc1 );
- mac[ 5] = (unsigned char)( acc1 >> 8 );
- mac[ 6] = (unsigned char)( acc1 >> 16 );
- mac[ 7] = (unsigned char)( acc1 >> 24 );
- mac[ 8] = (unsigned char)( acc2 );
- mac[ 9] = (unsigned char)( acc2 >> 8 );
- mac[10] = (unsigned char)( acc2 >> 16 );
- mac[11] = (unsigned char)( acc2 >> 24 );
- mac[12] = (unsigned char)( acc3 );
- mac[13] = (unsigned char)( acc3 >> 8 );
- mac[14] = (unsigned char)( acc3 >> 16 );
- mac[15] = (unsigned char)( acc3 >> 24 );
-}
-
-void mbedtls_poly1305_init( mbedtls_poly1305_context *ctx )
-{
- POLY1305_VALIDATE( ctx != NULL );
-
- mbedtls_platform_zeroize( ctx, sizeof( mbedtls_poly1305_context ) );
-}
-
-void mbedtls_poly1305_free( mbedtls_poly1305_context *ctx )
-{
- if( ctx == NULL )
- return;
-
- mbedtls_platform_zeroize( ctx, sizeof( mbedtls_poly1305_context ) );
-}
-
-int mbedtls_poly1305_starts( mbedtls_poly1305_context *ctx,
- const unsigned char key[32] )
-{
- POLY1305_VALIDATE_RET( ctx != NULL );
- POLY1305_VALIDATE_RET( key != NULL );
-
- /* r &= 0x0ffffffc0ffffffc0ffffffc0fffffff */
- ctx->r[0] = BYTES_TO_U32_LE( key, 0 ) & 0x0FFFFFFFU;
- ctx->r[1] = BYTES_TO_U32_LE( key, 4 ) & 0x0FFFFFFCU;
- ctx->r[2] = BYTES_TO_U32_LE( key, 8 ) & 0x0FFFFFFCU;
- ctx->r[3] = BYTES_TO_U32_LE( key, 12 ) & 0x0FFFFFFCU;
-
- ctx->s[0] = BYTES_TO_U32_LE( key, 16 );
- ctx->s[1] = BYTES_TO_U32_LE( key, 20 );
- ctx->s[2] = BYTES_TO_U32_LE( key, 24 );
- ctx->s[3] = BYTES_TO_U32_LE( key, 28 );
-
- /* Initial accumulator state */
- ctx->acc[0] = 0U;
- ctx->acc[1] = 0U;
- ctx->acc[2] = 0U;
- ctx->acc[3] = 0U;
- ctx->acc[4] = 0U;
-
- /* Queue initially empty */
- mbedtls_platform_zeroize( ctx->queue, sizeof( ctx->queue ) );
- ctx->queue_len = 0U;
-
- return( 0 );
-}
-
-int mbedtls_poly1305_update( mbedtls_poly1305_context *ctx,
- const unsigned char *input,
- size_t ilen )
-{
- size_t offset = 0U;
- size_t remaining = ilen;
- size_t queue_free_len;
- size_t nblocks;
- POLY1305_VALIDATE_RET( ctx != NULL );
- POLY1305_VALIDATE_RET( ilen == 0 || input != NULL );
-
- if( ( remaining > 0U ) && ( ctx->queue_len > 0U ) )
- {
- queue_free_len = ( POLY1305_BLOCK_SIZE_BYTES - ctx->queue_len );
-
- if( ilen < queue_free_len )
- {
- /* Not enough data to complete the block.
- * Store this data with the other leftovers.
- */
- memcpy( &ctx->queue[ctx->queue_len],
- input,
- ilen );
-
- ctx->queue_len += ilen;
-
- remaining = 0U;
- }
- else
- {
- /* Enough data to produce a complete block */
- memcpy( &ctx->queue[ctx->queue_len],
- input,
- queue_free_len );
-
- ctx->queue_len = 0U;
-
- poly1305_process( ctx, 1U, ctx->queue, 1U ); /* add padding bit */
-
- offset += queue_free_len;
- remaining -= queue_free_len;
- }
- }
-
- if( remaining >= POLY1305_BLOCK_SIZE_BYTES )
- {
- nblocks = remaining / POLY1305_BLOCK_SIZE_BYTES;
-
- poly1305_process( ctx, nblocks, &input[offset], 1U );
-
- offset += nblocks * POLY1305_BLOCK_SIZE_BYTES;
- remaining %= POLY1305_BLOCK_SIZE_BYTES;
- }
-
- if( remaining > 0U )
- {
- /* Store partial block */
- ctx->queue_len = remaining;
- memcpy( ctx->queue, &input[offset], remaining );
- }
-
- return( 0 );
-}
-
-int mbedtls_poly1305_finish( mbedtls_poly1305_context *ctx,
- unsigned char mac[16] )
-{
- POLY1305_VALIDATE_RET( ctx != NULL );
- POLY1305_VALIDATE_RET( mac != NULL );
-
- /* Process any leftover data */
- if( ctx->queue_len > 0U )
- {
- /* Add padding bit */
- ctx->queue[ctx->queue_len] = 1U;
- ctx->queue_len++;
-
- /* Pad with zeroes */
- memset( &ctx->queue[ctx->queue_len],
- 0,
- POLY1305_BLOCK_SIZE_BYTES - ctx->queue_len );
-
- poly1305_process( ctx, 1U, /* Process 1 block */
- ctx->queue, 0U ); /* Already padded above */
- }
-
- poly1305_compute_mac( ctx, mac );
-
- return( 0 );
-}
-
-int mbedtls_poly1305_mac( const unsigned char key[32],
- const unsigned char *input,
- size_t ilen,
- unsigned char mac[16] )
-{
- mbedtls_poly1305_context ctx;
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- POLY1305_VALIDATE_RET( key != NULL );
- POLY1305_VALIDATE_RET( mac != NULL );
- POLY1305_VALIDATE_RET( ilen == 0 || input != NULL );
-
- mbedtls_poly1305_init( &ctx );
-
- ret = mbedtls_poly1305_starts( &ctx, key );
- if( ret != 0 )
- goto cleanup;
-
- ret = mbedtls_poly1305_update( &ctx, input, ilen );
- if( ret != 0 )
- goto cleanup;
-
- ret = mbedtls_poly1305_finish( &ctx, mac );
-
-cleanup:
- mbedtls_poly1305_free( &ctx );
- return( ret );
-}
-
-#endif /* MBEDTLS_POLY1305_ALT */
-
-#if defined(MBEDTLS_SELF_TEST)
-
-static const unsigned char test_keys[2][32] =
-{
- {
- 0x85, 0xd6, 0xbe, 0x78, 0x57, 0x55, 0x6d, 0x33,
- 0x7f, 0x44, 0x52, 0xfe, 0x42, 0xd5, 0x06, 0xa8,
- 0x01, 0x03, 0x80, 0x8a, 0xfb, 0x0d, 0xb2, 0xfd,
- 0x4a, 0xbf, 0xf6, 0xaf, 0x41, 0x49, 0xf5, 0x1b
- },
- {
- 0x1c, 0x92, 0x40, 0xa5, 0xeb, 0x55, 0xd3, 0x8a,
- 0xf3, 0x33, 0x88, 0x86, 0x04, 0xf6, 0xb5, 0xf0,
- 0x47, 0x39, 0x17, 0xc1, 0x40, 0x2b, 0x80, 0x09,
- 0x9d, 0xca, 0x5c, 0xbc, 0x20, 0x70, 0x75, 0xc0
- }
-};
-
-static const unsigned char test_data[2][127] =
-{
- {
- 0x43, 0x72, 0x79, 0x70, 0x74, 0x6f, 0x67, 0x72,
- 0x61, 0x70, 0x68, 0x69, 0x63, 0x20, 0x46, 0x6f,
- 0x72, 0x75, 0x6d, 0x20, 0x52, 0x65, 0x73, 0x65,
- 0x61, 0x72, 0x63, 0x68, 0x20, 0x47, 0x72, 0x6f,
- 0x75, 0x70
- },
- {
- 0x27, 0x54, 0x77, 0x61, 0x73, 0x20, 0x62, 0x72,
- 0x69, 0x6c, 0x6c, 0x69, 0x67, 0x2c, 0x20, 0x61,
- 0x6e, 0x64, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73,
- 0x6c, 0x69, 0x74, 0x68, 0x79, 0x20, 0x74, 0x6f,
- 0x76, 0x65, 0x73, 0x0a, 0x44, 0x69, 0x64, 0x20,
- 0x67, 0x79, 0x72, 0x65, 0x20, 0x61, 0x6e, 0x64,
- 0x20, 0x67, 0x69, 0x6d, 0x62, 0x6c, 0x65, 0x20,
- 0x69, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x77,
- 0x61, 0x62, 0x65, 0x3a, 0x0a, 0x41, 0x6c, 0x6c,
- 0x20, 0x6d, 0x69, 0x6d, 0x73, 0x79, 0x20, 0x77,
- 0x65, 0x72, 0x65, 0x20, 0x74, 0x68, 0x65, 0x20,
- 0x62, 0x6f, 0x72, 0x6f, 0x67, 0x6f, 0x76, 0x65,
- 0x73, 0x2c, 0x0a, 0x41, 0x6e, 0x64, 0x20, 0x74,
- 0x68, 0x65, 0x20, 0x6d, 0x6f, 0x6d, 0x65, 0x20,
- 0x72, 0x61, 0x74, 0x68, 0x73, 0x20, 0x6f, 0x75,
- 0x74, 0x67, 0x72, 0x61, 0x62, 0x65, 0x2e
- }
-};
-
-static const size_t test_data_len[2] =
-{
- 34U,
- 127U
-};
-
-static const unsigned char test_mac[2][16] =
-{
- {
- 0xa8, 0x06, 0x1d, 0xc1, 0x30, 0x51, 0x36, 0xc6,
- 0xc2, 0x2b, 0x8b, 0xaf, 0x0c, 0x01, 0x27, 0xa9
- },
- {
- 0x45, 0x41, 0x66, 0x9a, 0x7e, 0xaa, 0xee, 0x61,
- 0xe7, 0x08, 0xdc, 0x7c, 0xbc, 0xc5, 0xeb, 0x62
- }
-};
-
-/* 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 )
-
-int mbedtls_poly1305_self_test( int verbose )
-{
- unsigned char mac[16];
- unsigned i;
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- for( i = 0U; i < 2U; i++ )
- {
- if( verbose != 0 )
- mbedtls_printf( " Poly1305 test %u ", i );
-
- ret = mbedtls_poly1305_mac( test_keys[i],
- test_data[i],
- test_data_len[i],
- mac );
- ASSERT( 0 == ret, ( "error code: %i\n", ret ) );
-
- ASSERT( 0 == memcmp( mac, test_mac[i], 16U ), ( "failed (mac)\n" ) );
-
- if( verbose != 0 )
- mbedtls_printf( "passed\n" );
- }
-
- if( verbose != 0 )
- mbedtls_printf( "\n" );
-
- return( 0 );
-}
-
-#endif /* MBEDTLS_SELF_TEST */
-
-#endif /* MBEDTLS_POLY1305_C */
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