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Diffstat (limited to 'crypto/ec/curve448/eddsa.c')
-rw-r--r--crypto/ec/curve448/eddsa.c93
1 files changed, 59 insertions, 34 deletions
diff --git a/crypto/ec/curve448/eddsa.c b/crypto/ec/curve448/eddsa.c
index ba3623928c..58e9e92d4c 100644
--- a/crypto/ec/curve448/eddsa.c
+++ b/crypto/ec/curve448/eddsa.c
@@ -19,23 +19,30 @@
#define COFACTOR 4
-static c448_error_t oneshot_hash(uint8_t *out, size_t outlen,
+static c448_error_t oneshot_hash(OPENSSL_CTX *ctx, uint8_t *out, size_t outlen,
const uint8_t *in, size_t inlen)
{
EVP_MD_CTX *hashctx = EVP_MD_CTX_new();
+ EVP_MD *shake256 = NULL;
+ c448_error_t ret = C448_FAILURE;
if (hashctx == NULL)
return C448_FAILURE;
- if (!EVP_DigestInit_ex(hashctx, EVP_shake256(), NULL)
+ shake256 = EVP_MD_fetch(ctx, "SHAKE256", NULL);
+ if (shake256 == NULL)
+ goto err;
+
+ if (!EVP_DigestInit_ex(hashctx, shake256, NULL)
|| !EVP_DigestUpdate(hashctx, in, inlen)
- || !EVP_DigestFinalXOF(hashctx, out, outlen)) {
- EVP_MD_CTX_free(hashctx);
- return C448_FAILURE;
- }
+ || !EVP_DigestFinalXOF(hashctx, out, outlen))
+ goto err;
+ ret = C448_SUCCESS;
+ err:
EVP_MD_CTX_free(hashctx);
- return C448_SUCCESS;
+ EVP_MD_meth_free(shake256);
+ return ret;
}
static void clamp(uint8_t secret_scalar_ser[EDDSA_448_PRIVATE_BYTES])
@@ -45,13 +52,15 @@ static void clamp(uint8_t secret_scalar_ser[EDDSA_448_PRIVATE_BYTES])
secret_scalar_ser[EDDSA_448_PRIVATE_BYTES - 2] |= 0x80;
}
-static c448_error_t hash_init_with_dom(EVP_MD_CTX *hashctx, uint8_t prehashed,
+static c448_error_t hash_init_with_dom(OPENSSL_CTX *ctx, EVP_MD_CTX *hashctx,
+ uint8_t prehashed,
uint8_t for_prehash,
const uint8_t *context,
size_t context_len)
{
const char *dom_s = "SigEd448";
uint8_t dom[2];
+ EVP_MD *shake256 = NULL;
if (context_len > UINT8_MAX)
return C448_FAILURE;
@@ -60,27 +69,36 @@ static c448_error_t hash_init_with_dom(EVP_MD_CTX *hashctx, uint8_t prehashed,
- (for_prehash == 0 ? 1 : 0));
dom[1] = (uint8_t)context_len;
- if (!EVP_DigestInit_ex(hashctx, EVP_shake256(), NULL)
+ shake256 = EVP_MD_fetch(ctx, "SHAKE256", NULL);
+ if (shake256 == NULL)
+ return C448_FAILURE;
+
+ if (!EVP_DigestInit_ex(hashctx, shake256, NULL)
|| !EVP_DigestUpdate(hashctx, dom_s, strlen(dom_s))
|| !EVP_DigestUpdate(hashctx, dom, sizeof(dom))
- || !EVP_DigestUpdate(hashctx, context, context_len))
+ || !EVP_DigestUpdate(hashctx, context, context_len)) {
+ EVP_MD_meth_free(shake256);
return C448_FAILURE;
+ }
+ EVP_MD_meth_free(shake256);
return C448_SUCCESS;
}
/* In this file because it uses the hash */
c448_error_t c448_ed448_convert_private_key_to_x448(
+ OPENSSL_CTX *ctx,
uint8_t x[X448_PRIVATE_BYTES],
const uint8_t ed [EDDSA_448_PRIVATE_BYTES])
{
/* pass the private key through oneshot_hash function */
/* and keep the first X448_PRIVATE_BYTES bytes */
- return oneshot_hash(x, X448_PRIVATE_BYTES, ed,
+ return oneshot_hash(ctx, x, X448_PRIVATE_BYTES, ed,
EDDSA_448_PRIVATE_BYTES);
}
c448_error_t c448_ed448_derive_public_key(
+ OPENSSL_CTX *ctx,
uint8_t pubkey[EDDSA_448_PUBLIC_BYTES],
const uint8_t privkey[EDDSA_448_PRIVATE_BYTES])
{
@@ -90,7 +108,8 @@ c448_error_t c448_ed448_derive_public_key(
unsigned int c;
curve448_point_t p;
- if (!oneshot_hash(secret_scalar_ser, sizeof(secret_scalar_ser), privkey,
+ if (!oneshot_hash(ctx, secret_scalar_ser, sizeof(secret_scalar_ser),
+ privkey,
EDDSA_448_PRIVATE_BYTES))
return C448_FAILURE;
@@ -123,6 +142,7 @@ c448_error_t c448_ed448_derive_public_key(
}
c448_error_t c448_ed448_sign(
+ OPENSSL_CTX *ctx,
uint8_t signature[EDDSA_448_SIGNATURE_BYTES],
const uint8_t privkey[EDDSA_448_PRIVATE_BYTES],
const uint8_t pubkey[EDDSA_448_PUBLIC_BYTES],
@@ -148,7 +168,7 @@ c448_error_t c448_ed448_sign(
*/
uint8_t expanded[EDDSA_448_PRIVATE_BYTES * 2];
- if (!oneshot_hash(expanded, sizeof(expanded), privkey,
+ if (!oneshot_hash(ctx, expanded, sizeof(expanded), privkey,
EDDSA_448_PRIVATE_BYTES))
goto err;
clamp(expanded);
@@ -156,7 +176,8 @@ c448_error_t c448_ed448_sign(
EDDSA_448_PRIVATE_BYTES);
/* Hash to create the nonce */
- if (!hash_init_with_dom(hashctx, prehashed, 0, context, context_len)
+ if (!hash_init_with_dom(ctx, hashctx, prehashed, 0, context,
+ context_len)
|| !EVP_DigestUpdate(hashctx,
expanded + EDDSA_448_PRIVATE_BYTES,
EDDSA_448_PRIVATE_BYTES)
@@ -197,7 +218,7 @@ c448_error_t c448_ed448_sign(
uint8_t challenge[2 * EDDSA_448_PRIVATE_BYTES];
/* Compute the challenge */
- if (!hash_init_with_dom(hashctx, prehashed, 0, context, context_len)
+ if (!hash_init_with_dom(ctx, hashctx, prehashed, 0, context, context_len)
|| !EVP_DigestUpdate(hashctx, nonce_point, sizeof(nonce_point))
|| !EVP_DigestUpdate(hashctx, pubkey, EDDSA_448_PUBLIC_BYTES)
|| !EVP_DigestUpdate(hashctx, message, message_len)
@@ -228,17 +249,19 @@ c448_error_t c448_ed448_sign(
}
c448_error_t c448_ed448_sign_prehash(
+ OPENSSL_CTX *ctx,
uint8_t signature[EDDSA_448_SIGNATURE_BYTES],
const uint8_t privkey[EDDSA_448_PRIVATE_BYTES],
const uint8_t pubkey[EDDSA_448_PUBLIC_BYTES],
const uint8_t hash[64], const uint8_t *context,
size_t context_len)
{
- return c448_ed448_sign(signature, privkey, pubkey, hash, 64, 1, context,
- context_len);
+ return c448_ed448_sign(ctx, signature, privkey, pubkey, hash, 64, 1,
+ context, context_len);
}
c448_error_t c448_ed448_verify(
+ OPENSSL_CTX *ctx,
const uint8_t signature[EDDSA_448_SIGNATURE_BYTES],
const uint8_t pubkey[EDDSA_448_PUBLIC_BYTES],
const uint8_t *message, size_t message_len,
@@ -291,7 +314,7 @@ c448_error_t c448_ed448_verify(
uint8_t challenge[2 * EDDSA_448_PRIVATE_BYTES];
if (hashctx == NULL
- || !hash_init_with_dom(hashctx, prehashed, 0, context,
+ || !hash_init_with_dom(ctx, hashctx, prehashed, 0, context,
context_len)
|| !EVP_DigestUpdate(hashctx, signature, EDDSA_448_PUBLIC_BYTES)
|| !EVP_DigestUpdate(hashctx, pubkey, EDDSA_448_PUBLIC_BYTES)
@@ -321,52 +344,54 @@ c448_error_t c448_ed448_verify(
}
c448_error_t c448_ed448_verify_prehash(
+ OPENSSL_CTX *ctx,
const uint8_t signature[EDDSA_448_SIGNATURE_BYTES],
const uint8_t pubkey[EDDSA_448_PUBLIC_BYTES],
const uint8_t hash[64], const uint8_t *context,
uint8_t context_len)
{
- return c448_ed448_verify(signature, pubkey, hash, 64, 1, context,
+ return c448_ed448_verify(ctx, signature, pubkey, hash, 64, 1, context,
context_len);
}
-int ED448_sign(uint8_t *out_sig, const uint8_t *message, size_t message_len,
- const uint8_t public_key[57], const uint8_t private_key[57],
- const uint8_t *context, size_t context_len)
+int ED448_sign(OPENSSL_CTX *ctx, uint8_t *out_sig, const uint8_t *message,
+ size_t message_len, const uint8_t public_key[57],
+ const uint8_t private_key[57], const uint8_t *context,
+ size_t context_len)
{
- return c448_ed448_sign(out_sig, private_key, public_key, message,
+ return c448_ed448_sign(ctx, out_sig, private_key, public_key, message,
message_len, 0, context, context_len)
== C448_SUCCESS;
}
-int ED448_verify(const uint8_t *message, size_t message_len,
+int ED448_verify(OPENSSL_CTX *ctx, const uint8_t *message, size_t message_len,
const uint8_t signature[114], const uint8_t public_key[57],
const uint8_t *context, size_t context_len)
{
- return c448_ed448_verify(signature, public_key, message, message_len, 0,
- context, (uint8_t)context_len) == C448_SUCCESS;
+ return c448_ed448_verify(ctx, signature, public_key, message, message_len,
+ 0, context, (uint8_t)context_len) == C448_SUCCESS;
}
-int ED448ph_sign(uint8_t *out_sig, const uint8_t hash[64],
+int ED448ph_sign(OPENSSL_CTX *ctx, uint8_t *out_sig, const uint8_t hash[64],
const uint8_t public_key[57], const uint8_t private_key[57],
const uint8_t *context, size_t context_len)
{
- return c448_ed448_sign_prehash(out_sig, private_key, public_key, hash,
+ return c448_ed448_sign_prehash(ctx, out_sig, private_key, public_key, hash,
context, context_len) == C448_SUCCESS;
}
-int ED448ph_verify(const uint8_t hash[64], const uint8_t signature[114],
- const uint8_t public_key[57], const uint8_t *context,
- size_t context_len)
+int ED448ph_verify(OPENSSL_CTX *ctx, const uint8_t hash[64],
+ const uint8_t signature[114], const uint8_t public_key[57],
+ const uint8_t *context, size_t context_len)
{
- return c448_ed448_verify_prehash(signature, public_key, hash, context,
+ return c448_ed448_verify_prehash(ctx, signature, public_key, hash, context,
(uint8_t)context_len) == C448_SUCCESS;
}
-int ED448_public_from_private(uint8_t out_public_key[57],
+int ED448_public_from_private(OPENSSL_CTX *ctx, uint8_t out_public_key[57],
const uint8_t private_key[57])
{
- return c448_ed448_derive_public_key(out_public_key, private_key)
+ return c448_ed448_derive_public_key(ctx, out_public_key, private_key)
== C448_SUCCESS;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-22 00:40:22 +0000