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-rw-r--r--src/providers/bcrypt.c33
-rw-r--r--src/providers/mbedtls.c44
-rw-r--r--src/providers/monocypher.c2
-rw-r--r--src/providers/openssl.c281
4 files changed, 270 insertions, 90 deletions
diff --git a/src/providers/bcrypt.c b/src/providers/bcrypt.c
index d1b9aa5..b9c370b 100644
--- a/src/providers/bcrypt.c
+++ b/src/providers/bcrypt.c
@@ -2,7 +2,7 @@
* Copyright (c) 2024 Vaughn Nugent
*
* Package: noscrypt
-* File: impl/bcrypt.c
+* File: providers/bcrypt.c
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@@ -63,7 +63,7 @@ _IMPLSTB NTSTATUS _bcInitSha256(struct _bcrypt_ctx* ctx, DWORD flags)
return result;
}
-_IMPLSTB NTSTATUS _bcCreateHmac(struct _bcrypt_ctx* ctx, const cspan_t* key)
+_IMPLSTB NTSTATUS _bcCreateHmac(struct _bcrypt_ctx* ctx, cspan_t key)
{
/*
* NOTE:
@@ -79,8 +79,8 @@ _IMPLSTB NTSTATUS _bcCreateHmac(struct _bcrypt_ctx* ctx, const cspan_t* key)
&ctx->hHash,
NULL,
0,
- (uint8_t*)key->data,
- key->size,
+ (uint8_t*)ncSpanGetOffsetC(key, 0),
+ ncSpanGetSizeC(key),
BCRYPT_HASH_REUSABLE_FLAG /* Enable reusable for expand function */
);
}
@@ -92,7 +92,7 @@ _IMPLSTB NTSTATUS _bcCreate(struct _bcrypt_ctx* ctx)
/* Zero out key span for 0 size and NULL data ptr */
SecureZeroMemory(&key, sizeof(cspan_t));
- return _bcCreateHmac(ctx, &key);
+ return _bcCreateHmac(ctx, key);
}
_IMPLSTB NTSTATUS _bcHashDataRaw(const struct _bcrypt_ctx* ctx, const uint8_t* data, uint32_t len)
@@ -100,9 +100,13 @@ _IMPLSTB NTSTATUS _bcHashDataRaw(const struct _bcrypt_ctx* ctx, const uint8_t* d
return BCryptHashData(ctx->hHash, (uint8_t*)data, len, 0);
}
-_IMPLSTB NTSTATUS _bcHashData(const struct _bcrypt_ctx* ctx, const cspan_t* data)
+_IMPLSTB NTSTATUS _bcHashData(const struct _bcrypt_ctx* ctx, cspan_t data)
{
- return _bcHashDataRaw(ctx, data->data, data->size);
+ return _bcHashDataRaw(
+ ctx,
+ ncSpanGetOffsetC(data, 0),
+ ncSpanGetSizeC(data)
+ );
}
_IMPLSTB NTSTATUS _bcFinishHash(const struct _bcrypt_ctx* ctx, sha256_t digestOut32)
@@ -118,8 +122,8 @@ _IMPLSTB void _bcDestroyCtx(struct _bcrypt_ctx* ctx)
/* Close the algorithm provider */
if (ctx->hAlg) BCryptCloseAlgorithmProvider(ctx->hAlg, 0);
- ctx->hAlg = NULL;
ctx->hHash = NULL;
+ ctx->hAlg = NULL;
}
#ifndef _IMPL_SECURE_ZERO_MEMSET
@@ -146,7 +150,7 @@ _IMPLSTB void _bcDestroyCtx(struct _bcrypt_ctx* ctx)
/* Export function fallack */
#define _IMPL_CRYPTO_SHA256_DIGEST _bcrypt_sha256_digest
- _IMPLSTB cstatus_t _bcrypt_sha256_digest(const cspan_t* data, sha256_t digestOut32)
+ _IMPLSTB cstatus_t _bcrypt_sha256_digest(cspan_t data, sha256_t digestOut32)
{
cstatus_t result;
struct _bcrypt_ctx ctx;
@@ -177,7 +181,7 @@ _IMPLSTB void _bcDestroyCtx(struct _bcrypt_ctx* ctx)
/* Export function */
#define _IMPL_CRYPTO_SHA256_HMAC _bcrypt_hmac_sha256
- _IMPLSTB cstatus_t _bcrypt_hmac_sha256(const cspan_t* key, const cspan_t* data, sha256_t hmacOut32)
+ _IMPLSTB cstatus_t _bcrypt_hmac_sha256(cspan_t key, cspan_t data, sha256_t hmacOut32)
{
cstatus_t result;
struct _bcrypt_ctx ctx;
@@ -213,7 +217,7 @@ _IMPLSTB void _bcDestroyCtx(struct _bcrypt_ctx* ctx)
#define _IMPL_CRYPTO_SHA256_HKDF_EXPAND _bcrypt_fallback_hkdf_expand
- cstatus_t _bcrypt_hkdf_update(void* ctx, const cspan_t* data)
+ static cstatus_t _bcrypt_hkdf_update(void* ctx, cspan_t data)
{
DEBUG_ASSERT(ctx != NULL)
@@ -221,15 +225,16 @@ _IMPLSTB void _bcDestroyCtx(struct _bcrypt_ctx* ctx)
return CSTATUS_OK;
}
- cstatus_t _bcrypt_hkdf_finish(void* ctx, sha256_t hmacOut32)
+ static cstatus_t _bcrypt_hkdf_finish(void* ctx, sha256_t hmacOut32)
{
- DEBUG_ASSERT(ctx != NULL)
+ DEBUG_ASSERT(ctx != NULL);
+ DEBUG_ASSERT(hmacOut32 != NULL);
BC_FAIL(_bcFinishHash((struct _bcrypt_ctx*)ctx, hmacOut32))
return CSTATUS_OK;
}
- _IMPLSTB cstatus_t _bcrypt_fallback_hkdf_expand(const cspan_t* prk, const cspan_t* info, span_t* okm)
+ _IMPLSTB cstatus_t _bcrypt_fallback_hkdf_expand(cspan_t prk, cspan_t info, span_t okm)
{
cstatus_t result;
struct _bcrypt_ctx ctx;
diff --git a/src/providers/mbedtls.c b/src/providers/mbedtls.c
index df5201f..ead3279 100644
--- a/src/providers/mbedtls.c
+++ b/src/providers/mbedtls.c
@@ -2,7 +2,7 @@
* Copyright (c) 2024 Vaughn Nugent
*
* Package: noscrypt
-* File: mbedtls.c
+* File: providers/mbedtls.c
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@@ -95,13 +95,13 @@ _IMPLSTB const mbedtls_md_info_t* _mbed_sha256_alg(void)
#define _IMPL_CRYPTO_SHA256_DIGEST _mbed_sha256_digest
- _IMPLSTB cstatus_t _mbed_sha256_digest(const cspan_t* data, sha256_t digestOut32)
+ _IMPLSTB cstatus_t _mbed_sha256_digest(cspan_t data, sha256_t digestOut32)
{
- _overflow_check(data->size)
+ _overflow_check(data.size)
return mbedtls_sha256(
- data->data,
- data->size,
+ data.data,
+ data.size,
digestOut32,
0 /* Set 0 for sha256 mode */
) == 0 ? CSTATUS_OK : CSTATUS_FAIL;
@@ -114,19 +114,19 @@ _IMPLSTB const mbedtls_md_info_t* _mbed_sha256_alg(void)
#define _IMPL_CRYPTO_SHA256_HMAC _mbed_sha256_hmac
- _IMPLSTB cstatus_t _mbed_sha256_hmac(const cspan_t* key, const cspan_t* data, sha256_t hmacOut32)
+ _IMPLSTB cstatus_t _mbed_sha256_hmac(cspan_t key, cspan_t data, sha256_t hmacOut32)
{
- _overflow_check(data->size)
+ _overflow_check(data.size)
/* Keys should never be large enough for this to matter, but sanity check. */
- DEBUG_ASSERT2(key->size < SIZE_MAX, "Expected key size to be less than SIZE_MAX")
+ DEBUG_ASSERT2(key.size < SIZE_MAX, "Expected key size to be less than SIZE_MAX")
return mbedtls_md_hmac(
_mbed_sha256_alg(),
- key->data,
- key->size,
- data->data,
- data->size,
+ key.data,
+ key.size,
+ data.data,
+ data.size,
hmacOut32
) == 0 ? CSTATUS_OK : CSTATUS_FAIL;
}
@@ -137,21 +137,21 @@ _IMPLSTB const mbedtls_md_info_t* _mbed_sha256_alg(void)
#define _IMPL_CRYPTO_SHA256_HKDF_EXPAND _mbed_sha256_hkdf_expand
- _IMPLSTB cstatus_t _mbed_sha256_hkdf_expand(const cspan_t* prk, const cspan_t* info, span_t* okm)
+ _IMPLSTB cstatus_t _mbed_sha256_hkdf_expand(cspan_t prk, cspan_t info, span_t okm)
{
/* These sizes should never be large enough to overflow on <64bit platforms, but sanity check */
- DEBUG_ASSERT(okm->size < SIZE_MAX)
- DEBUG_ASSERT(prk->size < SIZE_MAX)
- DEBUG_ASSERT(info->size < SIZE_MAX)
+ DEBUG_ASSERT(okm.size < SIZE_MAX)
+ DEBUG_ASSERT(prk.size < SIZE_MAX)
+ DEBUG_ASSERT(info.size < SIZE_MAX)
return mbedtls_hkdf_expand(
_mbed_sha256_alg(),
- prk->data,
- prk->size,
- info->data,
- info->size,
- okm->data,
- okm->size
+ prk.data,
+ prk.size,
+ info.data,
+ info.size,
+ okm.data,
+ okm.size
) == 0 ? CSTATUS_OK : CSTATUS_FAIL;
}
diff --git a/src/providers/monocypher.c b/src/providers/monocypher.c
index 8ffe048..c35f63e 100644
--- a/src/providers/monocypher.c
+++ b/src/providers/monocypher.c
@@ -2,7 +2,7 @@
* Copyright (c) 2024 Vaughn Nugent
*
* Package: noscrypt
-* File: impl/monocypher.c
+* File: providers/monocypher.c
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
diff --git a/src/providers/openssl.c b/src/providers/openssl.c
index 1f31796..c2933fb 100644
--- a/src/providers/openssl.c
+++ b/src/providers/openssl.c
@@ -2,7 +2,7 @@
* Copyright (c) 2024 Vaughn Nugent
*
* Package: noscrypt
-* File: impl/openssl.c
+* File: providers/openssl.c
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@@ -26,6 +26,10 @@
#define _OSSL_FAIL(x) if(!(x)) return CSTATUS_FAIL;
+#define ossl_md_sha256() EVP_MD_fetch(NULL, "SHA2-256", NULL)
+#define ossl_evp_fetch_chacha20() EVP_CIPHER_fetch(NULL, "ChaCha20", NULL)
+#define ossl_mac_fetch_hmac() EVP_MAC_fetch(NULL, "hmac", NULL)
+
#ifndef _IMPL_SECURE_ZERO_MEMSET
#define _IMPL_SECURE_ZERO_MEMSET _ossl_secure_zero_memset
@@ -63,11 +67,20 @@
#define _IMPL_CRYPTO_SHA256_DIGEST _ossl_sha256_digest
- _IMPLSTB cstatus_t _ossl_sha256_digest(const cspan_t* data, sha256_t digestOut32)
+ _IMPLSTB cstatus_t _ossl_sha256_digest(cspan_t data, sha256_t digestOut32)
{
- _overflow_check(data->size)
+ _overflow_check(data.size);
+
+ DEBUG_ASSERT(digestOut32 != NULL);
+ DEBUG_ASSERT(ncSpanIsValidC(data));
- _OSSL_FAIL(SHA256(data->data, data->size, digestOut32))
+ _OSSL_FAIL(
+ SHA256(
+ ncSpanGetOffsetC(data, 0),
+ ncSpanGetSizeC(data),
+ digestOut32
+ )
+ );
return CSTATUS_OK;
}
@@ -81,29 +94,29 @@
/* Export function */
#define _IMPL_CRYPTO_SHA256_HMAC _ossl_hmac_sha256
- _IMPLSTB cstatus_t _ossl_hmac_sha256(const cspan_t* key, const cspan_t* data, sha256_t hmacOut32)
+ _IMPLSTB cstatus_t _ossl_hmac_sha256(cspan_t key, cspan_t data, sha256_t hmacOut32)
{
unsigned int hmacLen;
- _overflow_check(key->size)
- _overflow_check(data->size)
+ _overflow_check(key.size)
+ _overflow_check(data.size)
hmacLen = sizeof(sha256_t);
_OSSL_FAIL(
HMAC(
- EVP_sha256(),
- key->data,
- key->size,
- data->data,
- data->size,
+ ossl_md_sha256(),
+ ncSpanGetOffsetC(key, 0),
+ ncSpanGetSizeC(key),
+ ncSpanGetOffsetC(data, 0),
+ ncSpanGetSizeC(data),
hmacOut32,
&hmacLen
)
- )
+ );
/* digest length should match the actual digest size */
- DEBUG_ASSERT(hmacLen == sizeof(sha256_t))
+ DEBUG_ASSERT(hmacLen == sizeof(sha256_t));
return CSTATUS_OK;
}
@@ -112,73 +125,144 @@
#ifndef _IMPL_CRYPTO_SHA256_HKDF_EXPAND
- #include <openssl/hmac.h>
+ #include <openssl/evp.h>
#define _IMPL_CRYPTO_SHA256_HKDF_EXPAND _ossl_sha256_hkdf_expand
- cstatus_t _ossl_hkdf_update(void* ctx, const cspan_t* data)
+ struct ossl_hmac_state {
+ EVP_MAC_CTX* libCtx;
+ OSSL_PARAM params[2];
+ cspan_t prk;
+ };
+
+ static cstatus_t _ossl_hmac_init(const struct ossl_hmac_state* osslCtx)
{
- DEBUG_ASSERT(ctx != NULL)
+ DEBUG_ASSERT(ncSpanIsValidC(osslCtx->prk));
+ DEBUG_ASSERT(osslCtx->params != NULL);
- _overflow_check(data->size)
+ _OSSL_FAIL(
+ EVP_MAC_init(
+ osslCtx->libCtx,
+ ncSpanGetOffsetC(osslCtx->prk, 0),
+ ncSpanGetSizeC(osslCtx->prk),
+ osslCtx->params
+ )
+ );
- _OSSL_FAIL(EVP_DigestUpdate((EVP_MD_CTX*)ctx, data->data, data->size))
-
return CSTATUS_OK;
}
- cstatus_t _ossl_hkdf_finish(void* ctx, sha256_t hmacOut32)
+ static cstatus_t _ossl_hkdf_update(void* ctx, cspan_t data)
{
- unsigned int hmacSize;
+ const struct ossl_hmac_state* osslCtx;
- DEBUG_ASSERT(ctx != NULL)
+ DEBUG_ASSERT(ctx != NULL);
+ _overflow_check(data.size);
- hmacSize = sizeof(sha256_t);
+ osslCtx = (const struct ossl_hmac_state*)ctx;
- _OSSL_FAIL(EVP_DigestFinal_ex((EVP_MD_CTX*)ctx, hmacOut32, &hmacSize))
+ DEBUG_ASSERT(osslCtx->libCtx != NULL);
- /* When configured for sha256, should always be the same size in/out */
- DEBUG_ASSERT(hmacSize == sizeof(sha256_t))
+ _OSSL_FAIL(
+ EVP_MAC_update(
+ osslCtx->libCtx,
+ ncSpanGetOffsetC(data, 0),
+ ncSpanGetSizeC(data)
+ )
+ );
return CSTATUS_OK;
}
- _IMPLSTB cstatus_t _ossl_sha256_hkdf_expand(const cspan_t* prk, const cspan_t* info, span_t* okm)
+ static cstatus_t _ossl_hkdf_finish(void* ctx, sha256_t hmacOut32)
{
- EVP_MD_CTX* ctx;
+ const struct ossl_hmac_state* osslCtx;
+ size_t hmacSize;
+
+ DEBUG_ASSERT(ctx != NULL);
+ DEBUG_ASSERT(hmacOut32 != NULL);
+
+ osslCtx = (const struct ossl_hmac_state*)ctx;
+ hmacSize = 0;
+
+ DEBUG_ASSERT(osslCtx->libCtx != NULL);
+
+ _OSSL_FAIL(
+ EVP_MAC_final(
+ osslCtx->libCtx,
+ hmacOut32,
+ &hmacSize,
+ sizeof(sha256_t)
+ )
+ );
+
+ /* When configured for sha256, should always be the same size in/out */
+ DEBUG_ASSERT(hmacSize == sizeof(sha256_t));
+
+ /*
+ * Context must be re-initalized after finalize
+ * See lifecycle https://docs.openssl.org/3.0/man7/life_cycle-mac/#copyright
+ */
+
+ return _ossl_hmac_init(osslCtx);
+ }
+
+
+ _IMPLSTB cstatus_t _ossl_sha256_hkdf_expand(cspan_t prk, cspan_t info, span_t okm)
+ {
+ EVP_MAC* mac;
cstatus_t result;
- struct nc_hkdf_fn_cb_struct handler;
+ struct ossl_hmac_state hkdfState;
+ struct nc_hkdf_fn_cb_struct handler;
result = CSTATUS_FAIL;
+
+ handler.update = _ossl_hkdf_update;
+ handler.finish = _ossl_hkdf_finish;
+ _overflow_check(prk.size);
+ _overflow_check(info.size);
+ _overflow_check(okm.size);
+
+ hkdfState.params[0] = OSSL_PARAM_construct_utf8_string("digest", "sha256", 0);
+ hkdfState.params[1] = OSSL_PARAM_construct_end();
+
+ hkdfState.prk = prk;
+
/*
- * NOTE! Hmac reusable flag must be set to allow for multiple
- * calls to the finish function without losing the context.
+ * Silly openssl stuff. Enable hmac with sha256 using the system default
+ * security provider. The one-shot flag must also be disabled (0) because
+ * we need to call update multiple times.
*/
- if ((ctx = EVP_MD_CTX_create()) == NULL)
+ mac = ossl_mac_fetch_hmac();
+
+ if (mac == NULL)
{
- return CSTATUS_FAIL;
+ goto Cleanup;
}
- if (!EVP_DigestInit_ex2(ctx, EVP_sha256(), NULL))
+ hkdfState.libCtx = EVP_MAC_CTX_new(mac);
+
+ if (hkdfState.libCtx == NULL)
{
goto Cleanup;
}
- if (!EVP_DigestUpdate(ctx, prk->data, prk->size))
+ if (_ossl_hmac_init(&hkdfState) != CSTATUS_OK)
{
goto Cleanup;
}
-
- handler.update = _ossl_hkdf_update;
- handler.finish = _ossl_hkdf_finish;
- result = hkdfExpandProcess(&handler, ctx, info, okm);
+ DEBUG_ASSERT(EVP_MAC_CTX_get_mac_size(hkdfState.libCtx) == sizeof(sha256_t));
- Cleanup:
+ /* Pass the library */
+ result = hkdfExpandProcess(&handler, &hkdfState, info, okm);
- EVP_MD_CTX_destroy(ctx);
+ Cleanup:
+
+ if (hkdfState.libCtx) EVP_MAC_CTX_free(hkdfState.libCtx);
+ if (mac) EVP_MAC_free(mac);
return result;
}
@@ -191,39 +275,130 @@
#define _IMPL_CHACHA20_CRYPT _ossl_chacha20_crypt
- _IMPLSTB cstatus_t _ossl_chacha20_crypt(
- const uint8_t* key,
- const uint8_t* nonce,
- const uint8_t* input,
- uint8_t* output,
- uint32_t dataLen
+ _IMPLSTB cstatus_t _ossl_cipher_core(
+ const EVP_CIPHER* cipher,
+ cspan_t key,
+ cspan_t iv,
+ cspan_t input,
+ span_t output
)
{
cstatus_t result;
EVP_CIPHER_CTX* ctx;
+ int tempLen, osslResult;
+
+ DEBUG_ASSERT2(ncSpanGetSize(output) <= ncSpanGetSizeC(input), "Output buffer must be equal or larger than the input buffer");
+ DEBUG_ASSERT(cipher != NULL);
+
+ DEBUG_ASSERT((uint32_t)EVP_CIPHER_get_key_length(cipher) == ncSpanGetSizeC(key));
+ DEBUG_ASSERT((uint32_t)EVP_CIPHER_iv_length(cipher) == ncSpanGetSizeC(iv));
result = CSTATUS_FAIL;
- if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
+ ctx = EVP_CIPHER_CTX_new();
+
+ if (ctx == NULL)
{
- return CSTATUS_FAIL;
+ goto Cleanup;
}
- if (!EVP_EncryptInit_ex(ctx, EVP_chacha20(), NULL, key, nonce))
+ osslResult = EVP_EncryptInit_ex2(
+ ctx,
+ cipher,
+ ncSpanGetOffsetC(key, 0),
+ ncSpanGetOffsetC(iv, 0),
+ NULL
+ );
+
+ if (!osslResult)
{
goto Cleanup;
}
- if (!EVP_EncryptUpdate(ctx, output, (int*)&dataLen, input, dataLen))
+ osslResult = EVP_EncryptUpdate(
+ ctx,
+ ncSpanGetOffset(output, 0),
+ &tempLen,
+ ncSpanGetOffsetC(input, 0),
+ ncSpanGetSizeC(input)
+ );
+
+ if (!osslResult)
{
goto Cleanup;
}
+ /*
+ * We can't get a pointer outside the range of the
+ * output buffer
+ */
+ if (((uint32_t)tempLen) < ncSpanGetSize(output))
+ {
+ if (!EVP_EncryptFinal_ex(ctx, ncSpanGetOffset(output, tempLen), &tempLen))
+ {
+ goto Cleanup;
+ }
+ }
+
result = CSTATUS_OK;
Cleanup:
- EVP_CIPHER_CTX_free(ctx);
+ if (ctx) EVP_CIPHER_CTX_free(ctx);
+
+ return result;
+ }
+
+ _IMPLSTB cstatus_t _ossl_chacha20_crypt(
+ const uint8_t* key,
+ const uint8_t* nonce,
+ const uint8_t* input,
+ uint8_t* output,
+ uint32_t dataLen
+ )
+ {
+ cstatus_t result;
+ EVP_CIPHER* cipher;
+ uint8_t chaChaIv[CHACHA_NONCE_SIZE + 4];
+ cspan_t keySpan, nonceSpan, inputSpan;
+ span_t outputSpan;
+
+ result = CSTATUS_FAIL;
+
+ /*
+ * RFC 7539 ChaCha20 requires a 16 byte initialization vector. A
+ * counter value is preprended to the nonce to make up the 16 byte
+ * size.
+ *
+ * The counter is always set to 0 for the nonce.
+ */
+
+ ncCryptoSecureZero(chaChaIv, sizeof(chaChaIv));
+ MEMMOV(chaChaIv + 4, nonce, CHACHA_NONCE_SIZE);
+
+ ncSpanInitC(&keySpan, key, CHACHA_KEY_SIZE);
+ ncSpanInitC(&nonceSpan, chaChaIv, sizeof(chaChaIv));
+ ncSpanInitC(&inputSpan, input, dataLen);
+ ncSpanInit(&outputSpan, output, dataLen);
+
+ cipher = ossl_evp_fetch_chacha20();
+
+ if (cipher == NULL)
+ {
+ goto Cleanup;
+ }
+
+ result = _ossl_cipher_core(
+ cipher,
+ keySpan,
+ nonceSpan,
+ inputSpan,
+ outputSpan
+ );
+
+ Cleanup:
+
+ if (cipher) EVP_CIPHER_free(cipher);
return result;
}
generated by cgit (git 2.46.0) at 2024-11-16 16:23:56 +0000