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esp32 hwcrypto: Rework hardware crypto locking

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Should protect against concurrent use of hardware crypto primitives,
with good performance.

Not necessary to call esp_aes_acquire_hardware(),
esp_sha_acquire_hardware(), etc when using these APIs. These are
provided for external users calling the hardware crypto hardware
directly, to coexist with this implementation.
This commit is contained in:
Angus Gratton
2016-09-02 18:36:26 +10:00
committed by Wu Jian Gang
parent 4167b68eef
commit 0647d1e922
8 changed files with 235 additions and 340 deletions
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34
components/esp32/include/hwcrypto/sha.h
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@@ -15,10 +15,10 @@
#ifndef _ESP_SHA_H_
#define _ESP_SHA_H_
#include "esp_types.h"
#include "rom/ets_sys.h"
#include "rom/sha.h"
#include "esp_types.h"
#ifdef __cplusplus
extern "C" {
#endif
@@ -28,11 +28,32 @@ extern "C" {
*/
typedef struct {
SHA_CTX context;
int context_type;
enum SHA_TYPE context_type; /* defined in rom/sha.h */
} sha_context;
typedef sha_context SHA1_CTX;
/**
* \brief Lock access to SHA hardware unit
*
* SHA hardware unit can only be used by one
* consumer at a time.
*
* esp_sha_xxx API calls automatically manage locking & unlocking of
* hardware, this function is only needed if you want to call
* ets_sha_xxx functions directly.
*/
void esp_sha_acquire_hardware( void );
/**
* \brief Unlock access to SHA hardware unit
*
* esp_sha_xxx API calls automatically manage locking & unlocking of
* hardware, this function is only needed if you want to call
* ets_sha_xxx functions directly.
*/
void esp_sha_release_hardware( void );
/**
* \brief Initialize SHA-1 context
*
@@ -55,8 +76,6 @@ void esp_sha1_free( SHA1_CTX *ctx );
*/
void esp_sha1_clone( SHA1_CTX *dst, const SHA1_CTX *src );
void esp_sha1_process(SHA1_CTX *ctx, const unsigned char data[64]);
/**
* \brief SHA-1 context setup
*
@@ -92,7 +111,7 @@ void esp_sha1_output( const unsigned char *input, size_t ilen, unsigned char out
///
#define SHA256 SHA2_256
#define SHA224 4
#define SHA224 4 /* TODO: check this */
/**
* \brief SHA-256 context structure
@@ -113,7 +132,6 @@ void esp_sha256_init( SHA256_CTX *ctx );
* \param ctx SHA-256 context to be cleared
*/
void esp_sha256_free( SHA256_CTX *ctx );
void esp_sha256_process(SHA256_CTX *ctx, const unsigned char data[64]);
/**
* \brief Clone (the state of) a SHA-256 context
@@ -173,8 +191,6 @@ typedef sha_context SHA512_CTX;
*/
void esp_sha512_init( SHA512_CTX *ctx );
void esp_sha512_process( SHA512_CTX *ctx, const unsigned char data[128] );
/**
* \brief Clear SHA-512 context
*