diff options
Diffstat (limited to 'board/cr50/dcrypto/bn.c')
| -rw-r--r-- | board/cr50/dcrypto/bn.c | 40 |
1 files changed, 22 insertions, 18 deletions
diff --git a/board/cr50/dcrypto/bn.c b/board/cr50/dcrypto/bn.c index 6949eb0a0c..e92f366aeb 100644 --- a/board/cr50/dcrypto/bn.c +++ b/board/cr50/dcrypto/bn.c @@ -397,8 +397,10 @@ static void bn_modexp_internal(struct LITE_BIGNUM *output, } /* output = input ^ exp % N */ -int bn_modexp(struct LITE_BIGNUM *output, const struct LITE_BIGNUM *input, - const struct LITE_BIGNUM *exp, const struct LITE_BIGNUM *N) +enum dcrypto_result bn_modexp(struct LITE_BIGNUM *output, + const struct LITE_BIGNUM *input, + const struct LITE_BIGNUM *exp, + const struct LITE_BIGNUM *N) { #ifndef CR50_NO_BN_ASM if ((bn_bits(N) & 255) == 0) { @@ -407,12 +409,13 @@ int bn_modexp(struct LITE_BIGNUM *output, const struct LITE_BIGNUM *input, } #endif bn_modexp_internal(output, input, exp, N); - return 1; + return DCRYPTO_OK; } /* output = input ^ exp % N */ -int bn_modexp_word(struct LITE_BIGNUM *output, const struct LITE_BIGNUM *input, - uint32_t exp, const struct LITE_BIGNUM *N) +enum dcrypto_result bn_modexp_word(struct LITE_BIGNUM *output, + const struct LITE_BIGNUM *input, + uint32_t exp, const struct LITE_BIGNUM *N) { #ifndef CR50_NO_BN_ASM if ((bn_bits(N) & 255) == 0) { @@ -421,16 +424,16 @@ int bn_modexp_word(struct LITE_BIGNUM *output, const struct LITE_BIGNUM *input, } #endif { - struct LITE_BIGNUM pubexp; + struct LITE_BIGNUM pubexp; - DCRYPTO_bn_wrap(&pubexp, &exp, sizeof(exp)); - bn_modexp_internal(output, input, &pubexp, N); - return 1; + DCRYPTO_bn_wrap(&pubexp, &exp, sizeof(exp)); + bn_modexp_internal(output, input, &pubexp, N); + return DCRYPTO_OK; } } /* output = input ^ exp % N */ -int bn_modexp_blinded(struct LITE_BIGNUM *output, +enum dcrypto_result bn_modexp_blinded(struct LITE_BIGNUM *output, const struct LITE_BIGNUM *input, const struct LITE_BIGNUM *exp, const struct LITE_BIGNUM *N, @@ -443,7 +446,7 @@ int bn_modexp_blinded(struct LITE_BIGNUM *output, } #endif bn_modexp_internal(output, input, exp, N); - return 1; + return DCRYPTO_OK; } /* c[] += a * b[] */ @@ -795,8 +798,9 @@ int DCRYPTO_bn_div(struct LITE_BIGNUM *quotient, * if t < 0 then t := t + n * return t */ -int bn_modinv_vartime(struct LITE_BIGNUM *dst, const struct LITE_BIGNUM *src, - const struct LITE_BIGNUM *mod) +enum dcrypto_result bn_modinv_vartime(struct LITE_BIGNUM *dst, + const struct LITE_BIGNUM *src, + const struct LITE_BIGNUM *mod) { struct LITE_BIGNUM R; struct LITE_BIGNUM nR; @@ -907,7 +911,7 @@ int bn_modinv_vartime(struct LITE_BIGNUM *dst, const struct LITE_BIGNUM *src, if (r_len != 1 || BN_DIGIT(pR, 0) != 1) { /* gcd not 1; no direct inverse */ - return 0; + return DCRYPTO_FAIL; } if (t_neg) @@ -915,7 +919,7 @@ int bn_modinv_vartime(struct LITE_BIGNUM *dst, const struct LITE_BIGNUM *src, bn_set_bn(dst, pT, bn_digits(pT)); - return 1; + return DCRYPTO_OK; } #define PRIME1 3 @@ -1289,7 +1293,7 @@ static void print_primes(uint16_t prime) #endif } -int DCRYPTO_bn_generate_prime(struct LITE_BIGNUM *p) +enum dcrypto_result DCRYPTO_bn_generate_prime(struct LITE_BIGNUM *p) { size_t i; size_t j; @@ -1355,10 +1359,10 @@ int DCRYPTO_bn_generate_prime(struct LITE_BIGNUM *p) /* Make sure prime will work with F4 public exponent. */ if (bn_mod_f4(p) >= 2) { if (bn_probable_prime(p)) - return 1; + return DCRYPTO_OK; } } always_memset(composites_buf, 0, sizeof(composites_buf)); - return 0; + return DCRYPTO_FAIL; } |