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First go at using cifra for SHA512

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This commit is contained in:
Nicolas Stalder
2019-02-25 02:41:58 +01:00
parent 54241ecd42
commit 0c296bba30
7 changed files with 55 additions and 0 deletions
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3
targets/stm32l432/build/application.mk
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@@ -14,6 +14,7 @@ SRC += ../../fido2/extensions/extensions.c ../../fido2/extensions/solo.c
# Crypto libs
SRC += ../../crypto/sha256/sha256.c ../../crypto/micro-ecc/uECC.c ../../crypto/tiny-AES-c/aes.c
SRC += ../../crypto/cifra/src/sha512.c ../../crypto/cifra/src/blockwise.c
OBJ1=$(SRC:.c=.o)
OBJ=$(OBJ1:.s=.o)
@@ -21,6 +22,7 @@ OBJ=$(OBJ1:.s=.o)
INC = -Isrc/ -Isrc/cmsis/ -Ilib/ -Ilib/usbd/ -I../../fido2/ -I../../fido2/extensions
INC += -I../../tinycbor/src -I../../crypto/sha256 -I../../crypto/micro-ecc
INC += -I../../crypto/tiny-AES-c
INC += -I../../crypto/cifra/src
SEARCH=-L../../tinycbor/lib
@@ -66,6 +68,7 @@ all: $(TARGET).elf
$(CC) $^ $(HW) $(LDFLAGS) -o $@
%.hex: %.elf
$(SZ) $^
$(CP) -O ihex $^ $(TARGET).hex
clean:

16
targets/stm32l432/src/crypto.c
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@@ -24,6 +24,9 @@
#include "aes.h"
#include "ctap.h"
#include "device.h"
// stuff for SHA512
#include "sha2.h"
#include "blockwise.h"
#include APP_CONFIG
#include "log.h"
#include "memory_layout.h"
@@ -48,6 +51,7 @@ typedef enum
static SHA256_CTX sha256_ctx;
static cf_sha512_context sha512_ctx;
static const struct uECC_Curve_t * _es256_curve = NULL;
static const uint8_t * _signing_key = NULL;
static int _key_len = 0;
@@ -62,6 +66,9 @@ void crypto_sha256_init()
sha256_init(&sha256_ctx);
}
void crypto_sha512_init() {
cf_sha512_init(&sha512_ctx);
}
void crypto_load_master_secret(uint8_t * key)
{
@@ -86,6 +93,10 @@ void crypto_sha256_update(uint8_t * data, size_t len)
sha256_update(&sha256_ctx, data, len);
}
void crypto_sha512_update(const uint8_t * data, size_t len) {
cf_sha512_update(&sha512_ctx, data, len);
}
void crypto_sha256_update_secret()
{
sha256_update(&sha256_ctx, master_secret, 32);
@@ -96,6 +107,11 @@ void crypto_sha256_final(uint8_t * hash)
sha256_final(&sha256_ctx, hash);
}
void crypto_sha512_final(uint8_t * hash) {
// NB: there is also cf_sha512_digest
cf_sha512_digest_final(&sha512_ctx, hash);
}
void crypto_sha256_hmac_init(uint8_t * key, uint32_t klen, uint8_t * hmac)
{
uint8_t buf[64];