diff options
Diffstat (limited to 'providers/implementations/kdfs/sshkdf.c')
| -rw-r--r-- | providers/implementations/kdfs/sshkdf.c | 133 |
1 files changed, 121 insertions, 12 deletions
diff --git a/providers/implementations/kdfs/sshkdf.c b/providers/implementations/kdfs/sshkdf.c index c592ba72f1e0..4a9b141320bf 100644 --- a/providers/implementations/kdfs/sshkdf.c +++ b/providers/implementations/kdfs/sshkdf.c @@ -1,5 +1,5 @@ /* - * Copyright 2018-2022 The OpenSSL Project Authors. All Rights Reserved. + * Copyright 2018-2024 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy @@ -21,9 +21,11 @@ #include "prov/providercommon.h" #include "prov/implementations.h" #include "prov/provider_util.h" +#include "prov/securitycheck.h" /* See RFC 4253, Section 7.2 */ static OSSL_FUNC_kdf_newctx_fn kdf_sshkdf_new; +static OSSL_FUNC_kdf_dupctx_fn kdf_sshkdf_dup; static OSSL_FUNC_kdf_freectx_fn kdf_sshkdf_free; static OSSL_FUNC_kdf_reset_fn kdf_sshkdf_reset; static OSSL_FUNC_kdf_derive_fn kdf_sshkdf_derive; @@ -48,6 +50,7 @@ typedef struct { char type; /* X */ unsigned char *session_id; size_t session_id_len; + OSSL_FIPS_IND_DECLARE } KDF_SSHKDF; static void *kdf_sshkdf_new(void *provctx) @@ -57,10 +60,10 @@ static void *kdf_sshkdf_new(void *provctx) if (!ossl_prov_is_running()) return NULL; - if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) == NULL) - ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); - else + if ((ctx = OPENSSL_zalloc(sizeof(*ctx))) != NULL) { ctx->provctx = provctx; + OSSL_FIPS_IND_INIT(ctx) + } return ctx; } @@ -87,6 +90,31 @@ static void kdf_sshkdf_reset(void *vctx) ctx->provctx = provctx; } +static void *kdf_sshkdf_dup(void *vctx) +{ + const KDF_SSHKDF *src = (const KDF_SSHKDF *)vctx; + KDF_SSHKDF *dest; + + dest = kdf_sshkdf_new(src->provctx); + if (dest != NULL) { + if (!ossl_prov_memdup(src->key, src->key_len, + &dest->key, &dest->key_len) + || !ossl_prov_memdup(src->xcghash, src->xcghash_len, + &dest->xcghash , &dest->xcghash_len) + || !ossl_prov_memdup(src->session_id, src->session_id_len, + &dest->session_id , &dest->session_id_len) + || !ossl_prov_digest_copy(&dest->digest, &src->digest)) + goto err; + dest->type = src->type; + OSSL_FIPS_IND_COPY(dest, src) + } + return dest; + + err: + kdf_sshkdf_free(dest); + return NULL; +} + static int sshkdf_set_membuf(unsigned char **dst, size_t *dst_len, const OSSL_PARAM *p) { @@ -96,6 +124,51 @@ static int sshkdf_set_membuf(unsigned char **dst, size_t *dst_len, return OSSL_PARAM_get_octet_string(p, (void **)dst, 0, dst_len); } +#ifdef FIPS_MODULE +static int fips_digest_check_passed(KDF_SSHKDF *ctx, const EVP_MD *md) +{ + OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(ctx->provctx); + /* + * Perform digest check + * + * According to NIST SP 800-135r1 section 5.2, the valid hash functions are + * specified in FIPS 180-3. ACVP also only lists the same set of hash + * functions. + */ + int digest_unapproved = !EVP_MD_is_a(md, SN_sha1) + && !EVP_MD_is_a(md, SN_sha224) + && !EVP_MD_is_a(md, SN_sha256) + && !EVP_MD_is_a(md, SN_sha384) + && !EVP_MD_is_a(md, SN_sha512); + + if (digest_unapproved) { + if (!OSSL_FIPS_IND_ON_UNAPPROVED(ctx, OSSL_FIPS_IND_SETTABLE0, + libctx, "SSHKDF", "Digest", + ossl_fips_config_sshkdf_digest_check)) { + ERR_raise(ERR_LIB_PROV, PROV_R_DIGEST_NOT_ALLOWED); + return 0; + } + } + return 1; +} + +static int fips_key_check_passed(KDF_SSHKDF *ctx) +{ + OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(ctx->provctx); + int key_approved = ossl_kdf_check_key_size(ctx->key_len); + + if (!key_approved) { + if (!OSSL_FIPS_IND_ON_UNAPPROVED(ctx, OSSL_FIPS_IND_SETTABLE1, + libctx, "SSHKDF", "Key size", + ossl_fips_config_sshkdf_key_check)) { + ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH); + return 0; + } + } + return 1; +} +#endif + static int kdf_sshkdf_derive(void *vctx, unsigned char *key, size_t keylen, const OSSL_PARAM params[]) { @@ -126,6 +199,7 @@ static int kdf_sshkdf_derive(void *vctx, unsigned char *key, size_t keylen, ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_TYPE); return 0; } + return SSHKDF(md, ctx->key, ctx->key_len, ctx->xcghash, ctx->xcghash_len, ctx->session_id, ctx->session_id_len, @@ -138,16 +212,44 @@ static int kdf_sshkdf_set_ctx_params(void *vctx, const OSSL_PARAM params[]) KDF_SSHKDF *ctx = vctx; OSSL_LIB_CTX *provctx = PROV_LIBCTX_OF(ctx->provctx); - if (params == NULL) + if (ossl_param_is_empty(params)) return 1; - if (!ossl_prov_digest_load_from_params(&ctx->digest, params, provctx)) + if (!OSSL_FIPS_IND_SET_CTX_PARAM(ctx, OSSL_FIPS_IND_SETTABLE0, params, + OSSL_KDF_PARAM_FIPS_DIGEST_CHECK)) + return 0; + if (!OSSL_FIPS_IND_SET_CTX_PARAM(ctx, OSSL_FIPS_IND_SETTABLE1, params, + OSSL_KDF_PARAM_FIPS_KEY_CHECK)) return 0; - if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_KEY)) != NULL) + if (OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_DIGEST) != NULL) { + const EVP_MD *md = NULL; + + if (!ossl_prov_digest_load_from_params(&ctx->digest, params, provctx)) + return 0; + + md = ossl_prov_digest_md(&ctx->digest); + if (EVP_MD_xof(md)) { + ERR_raise(ERR_LIB_PROV, PROV_R_XOF_DIGESTS_NOT_ALLOWED); + return 0; + } + +#ifdef FIPS_MODULE + if (!fips_digest_check_passed(ctx, md)) + return 0; +#endif + } + + if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_KEY)) != NULL) { if (!sshkdf_set_membuf(&ctx->key, &ctx->key_len, p)) return 0; +#ifdef FIPS_MODULE + if (!fips_key_check_passed(ctx)) + return 0; +#endif + } + if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_SSHKDF_XCGHASH)) != NULL) if (!sshkdf_set_membuf(&ctx->xcghash, &ctx->xcghash_len, p)) @@ -186,6 +288,8 @@ static const OSSL_PARAM *kdf_sshkdf_settable_ctx_params(ossl_unused void *ctx, OSSL_PARAM_octet_string(OSSL_KDF_PARAM_SSHKDF_XCGHASH, NULL, 0), OSSL_PARAM_octet_string(OSSL_KDF_PARAM_SSHKDF_SESSION_ID, NULL, 0), OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_SSHKDF_TYPE, NULL, 0), + OSSL_FIPS_IND_SETTABLE_CTX_PARAM(OSSL_KDF_PARAM_FIPS_DIGEST_CHECK) + OSSL_FIPS_IND_SETTABLE_CTX_PARAM(OSSL_KDF_PARAM_FIPS_KEY_CHECK) OSSL_PARAM_END }; return known_settable_ctx_params; @@ -195,9 +299,13 @@ static int kdf_sshkdf_get_ctx_params(void *vctx, OSSL_PARAM params[]) { OSSL_PARAM *p; - if ((p = OSSL_PARAM_locate(params, OSSL_KDF_PARAM_SIZE)) != NULL) - return OSSL_PARAM_set_size_t(p, SIZE_MAX); - return -2; + if ((p = OSSL_PARAM_locate(params, OSSL_KDF_PARAM_SIZE)) != NULL) { + if (!OSSL_PARAM_set_size_t(p, SIZE_MAX)) + return 0; + } + if (!OSSL_FIPS_IND_GET_CTX_PARAM(((KDF_SSHKDF *)vctx), params)) + return 0; + return 1; } static const OSSL_PARAM *kdf_sshkdf_gettable_ctx_params(ossl_unused void *ctx, @@ -205,6 +313,7 @@ static const OSSL_PARAM *kdf_sshkdf_gettable_ctx_params(ossl_unused void *ctx, { static const OSSL_PARAM known_gettable_ctx_params[] = { OSSL_PARAM_size_t(OSSL_KDF_PARAM_SIZE, NULL), + OSSL_FIPS_IND_GETTABLE_CTX_PARAM() OSSL_PARAM_END }; return known_gettable_ctx_params; @@ -212,6 +321,7 @@ static const OSSL_PARAM *kdf_sshkdf_gettable_ctx_params(ossl_unused void *ctx, const OSSL_DISPATCH ossl_kdf_sshkdf_functions[] = { { OSSL_FUNC_KDF_NEWCTX, (void(*)(void))kdf_sshkdf_new }, + { OSSL_FUNC_KDF_DUPCTX, (void(*)(void))kdf_sshkdf_dup }, { OSSL_FUNC_KDF_FREECTX, (void(*)(void))kdf_sshkdf_free }, { OSSL_FUNC_KDF_RESET, (void(*)(void))kdf_sshkdf_reset }, { OSSL_FUNC_KDF_DERIVE, (void(*)(void))kdf_sshkdf_derive }, @@ -221,7 +331,7 @@ const OSSL_DISPATCH ossl_kdf_sshkdf_functions[] = { { OSSL_FUNC_KDF_GETTABLE_CTX_PARAMS, (void(*)(void))kdf_sshkdf_gettable_ctx_params }, { OSSL_FUNC_KDF_GET_CTX_PARAMS, (void(*)(void))kdf_sshkdf_get_ctx_params }, - { 0, NULL } + OSSL_DISPATCH_END }; static int SSHKDF(const EVP_MD *evp_md, @@ -299,4 +409,3 @@ out: OPENSSL_cleanse(digest, EVP_MAX_MD_SIZE); return ret; } - |