WolfSSL
/
wolfssl
mirror of https://github.com/wolfSSL/wolfssl.git
1
0
Fork 0
Code Issues Releases Wiki Activity

Fix for STM32 PKA ECC 521-bit support. Issue was 65 vs 66 buffer check. ZD 19379

pull/8450/head
David Garske 2025-02-13 12:15:04 -08:00
parent db0fa304a8
commit 86c3ee1a9d
1 changed files with 5 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
wolfcrypt/src/port/st/stm32.c
View File

@ -818,14 +818,12 @@ int stm32_ecc_verify_hash_ex(mp_int *r, mp_int *s, const byte* hash,
{
PKA_ECDSAVerifInTypeDef pka_ecc;
int size;
int szrbin;
int status;
uint8_t Rbin[STM32_MAX_ECC_SIZE];
uint8_t Sbin[STM32_MAX_ECC_SIZE];
uint8_t Qxbin[STM32_MAX_ECC_SIZE];
uint8_t Qybin[STM32_MAX_ECC_SIZE];
uint8_t Hashbin[STM32_MAX_ECC_SIZE];
uint8_t privKeybin[STM32_MAX_ECC_SIZE];
uint8_t prime[STM32_MAX_ECC_SIZE];
uint8_t coefA[STM32_MAX_ECC_SIZE];
uint8_t gen_x[STM32_MAX_ECC_SIZE];
@ -839,21 +837,17 @@ int stm32_ecc_verify_hash_ex(mp_int *r, mp_int *s, const byte* hash,
key->dp == NULL) {
return ECC_BAD_ARG_E;
}
*res = 0;
*res = 0; /* default to failure */
size = wc_ecc_size(key); /* get key size in bytes */
szrbin = mp_unsigned_bin_size(r);
size = wc_ecc_size(key);
status = stm32_get_from_mp_int(Rbin, r, szrbin);
/* load R/S and public X/Y using key size */
status = stm32_get_from_mp_int(Rbin, r, size);
if (status == MP_OKAY)
status = stm32_get_from_mp_int(Sbin, s, szrbin);
status = stm32_get_from_mp_int(Sbin, s, size);
if (status == MP_OKAY)
status = stm32_get_from_mp_int(Qxbin, key->pubkey.x, size);
if (status == MP_OKAY)
status = stm32_get_from_mp_int(Qybin, key->pubkey.y, size);
if (status == MP_OKAY)
status = stm32_get_from_mp_int(privKeybin, wc_ecc_key_get_priv(key),
size);
if (status != MP_OKAY)
return status;