diff options
Diffstat (limited to 'crypto/openssl/providers/implementations/kdfs/pkcs12kdf.c')
| -rw-r--r-- | crypto/openssl/providers/implementations/kdfs/pkcs12kdf.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/crypto/openssl/providers/implementations/kdfs/pkcs12kdf.c b/crypto/openssl/providers/implementations/kdfs/pkcs12kdf.c new file mode 100644 index 000000000000..b4ca4fff475d --- /dev/null +++ b/crypto/openssl/providers/implementations/kdfs/pkcs12kdf.c @@ -0,0 +1,319 @@ +/* + * Copyright 1999-2023 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 + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <openssl/trace.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> +#include <openssl/evp.h> +#include <openssl/kdf.h> +#include <openssl/core_names.h> +#include <openssl/proverr.h> +#include "internal/cryptlib.h" +#include "internal/numbers.h" +#include "crypto/evp.h" +#include "prov/provider_ctx.h" +#include "prov/providercommon.h" +#include "prov/implementations.h" +#include "prov/provider_util.h" + +static OSSL_FUNC_kdf_newctx_fn kdf_pkcs12_new; +static OSSL_FUNC_kdf_dupctx_fn kdf_pkcs12_dup; +static OSSL_FUNC_kdf_freectx_fn kdf_pkcs12_free; +static OSSL_FUNC_kdf_reset_fn kdf_pkcs12_reset; +static OSSL_FUNC_kdf_derive_fn kdf_pkcs12_derive; +static OSSL_FUNC_kdf_settable_ctx_params_fn kdf_pkcs12_settable_ctx_params; +static OSSL_FUNC_kdf_set_ctx_params_fn kdf_pkcs12_set_ctx_params; +static OSSL_FUNC_kdf_gettable_ctx_params_fn kdf_pkcs12_gettable_ctx_params; +static OSSL_FUNC_kdf_get_ctx_params_fn kdf_pkcs12_get_ctx_params; + +typedef struct { + void *provctx; + PROV_DIGEST digest; + unsigned char *pass; + size_t pass_len; + unsigned char *salt; + size_t salt_len; + uint64_t iter; + int id; +} KDF_PKCS12; + +/* PKCS12 compatible key/IV generation */ + +static int pkcs12kdf_derive(const unsigned char *pass, size_t passlen, + const unsigned char *salt, size_t saltlen, + int id, uint64_t iter, const EVP_MD *md_type, + unsigned char *out, size_t n) +{ + unsigned char *B = NULL, *D = NULL, *I = NULL, *p = NULL, *Ai = NULL; + size_t Slen, Plen, Ilen; + size_t i, j, k, u, v; + uint64_t iter_cnt; + int ret = 0, ui, vi; + EVP_MD_CTX *ctx = NULL; + + ctx = EVP_MD_CTX_new(); + if (ctx == NULL) { + ERR_raise(ERR_LIB_PROV, ERR_R_EVP_LIB); + goto end; + } + vi = EVP_MD_get_block_size(md_type); + ui = EVP_MD_get_size(md_type); + if (ui <= 0 || vi <= 0) { + ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DIGEST_SIZE); + goto end; + } + u = (size_t)ui; + v = (size_t)vi; + D = OPENSSL_malloc(v); + Ai = OPENSSL_malloc(u); + B = OPENSSL_malloc(v + 1); + Slen = v * ((saltlen + v - 1) / v); + if (passlen != 0) + Plen = v * ((passlen + v - 1) / v); + else + Plen = 0; + Ilen = Slen + Plen; + I = OPENSSL_malloc(Ilen); + if (D == NULL || Ai == NULL || B == NULL || I == NULL) + goto end; + for (i = 0; i < v; i++) + D[i] = id; + p = I; + for (i = 0; i < Slen; i++) + *p++ = salt[i % saltlen]; + for (i = 0; i < Plen; i++) + *p++ = pass[i % passlen]; + for (;;) { + if (!EVP_DigestInit_ex(ctx, md_type, NULL) + || !EVP_DigestUpdate(ctx, D, v) + || !EVP_DigestUpdate(ctx, I, Ilen) + || !EVP_DigestFinal_ex(ctx, Ai, NULL)) + goto end; + for (iter_cnt = 1; iter_cnt < iter; iter_cnt++) { + if (!EVP_DigestInit_ex(ctx, md_type, NULL) + || !EVP_DigestUpdate(ctx, Ai, u) + || !EVP_DigestFinal_ex(ctx, Ai, NULL)) + goto end; + } + memcpy(out, Ai, n < u ? n : u); + if (u >= n) { + ret = 1; + break; + } + n -= u; + out += u; + for (j = 0; j < v; j++) + B[j] = Ai[j % u]; + for (j = 0; j < Ilen; j += v) { + unsigned char *Ij = I + j; + uint16_t c = 1; + + /* Work out Ij = Ij + B + 1 */ + for (k = v; k > 0;) { + k--; + c += Ij[k] + B[k]; + Ij[k] = (unsigned char)c; + c >>= 8; + } + } + } + + end: + OPENSSL_free(Ai); + OPENSSL_free(B); + OPENSSL_free(D); + OPENSSL_free(I); + EVP_MD_CTX_free(ctx); + return ret; +} + +static void *kdf_pkcs12_new(void *provctx) +{ + KDF_PKCS12 *ctx; + + if (!ossl_prov_is_running()) + return NULL; + + ctx = OPENSSL_zalloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + ctx->provctx = provctx; + return ctx; +} + +static void kdf_pkcs12_cleanup(KDF_PKCS12 *ctx) +{ + ossl_prov_digest_reset(&ctx->digest); + OPENSSL_free(ctx->salt); + OPENSSL_clear_free(ctx->pass, ctx->pass_len); + memset(ctx, 0, sizeof(*ctx)); +} + +static void kdf_pkcs12_free(void *vctx) +{ + KDF_PKCS12 *ctx = (KDF_PKCS12 *)vctx; + + if (ctx != NULL) { + kdf_pkcs12_cleanup(ctx); + OPENSSL_free(ctx); + } +} + +static void kdf_pkcs12_reset(void *vctx) +{ + KDF_PKCS12 *ctx = (KDF_PKCS12 *)vctx; + void *provctx = ctx->provctx; + + kdf_pkcs12_cleanup(ctx); + ctx->provctx = provctx; +} + +static void *kdf_pkcs12_dup(void *vctx) +{ + const KDF_PKCS12 *src = (const KDF_PKCS12 *)vctx; + KDF_PKCS12 *dest; + + dest = kdf_pkcs12_new(src->provctx); + if (dest != NULL) { + if (!ossl_prov_memdup(src->salt, src->salt_len, + &dest->salt, &dest->salt_len) + || !ossl_prov_memdup(src->pass, src->pass_len, + &dest->pass , &dest->pass_len) + || !ossl_prov_digest_copy(&dest->digest, &src->digest)) + goto err; + dest->iter = src->iter; + dest->id = src->id; + } + return dest; + + err: + kdf_pkcs12_free(dest); + return NULL; +} + +static int pkcs12kdf_set_membuf(unsigned char **buffer, size_t *buflen, + const OSSL_PARAM *p) +{ + OPENSSL_clear_free(*buffer, *buflen); + *buffer = NULL; + *buflen = 0; + + if (p->data_size == 0) { + if ((*buffer = OPENSSL_malloc(1)) == NULL) + return 0; + } else if (p->data != NULL) { + if (!OSSL_PARAM_get_octet_string(p, (void **)buffer, 0, buflen)) + return 0; + } + return 1; +} + +static int kdf_pkcs12_derive(void *vctx, unsigned char *key, size_t keylen, + const OSSL_PARAM params[]) +{ + KDF_PKCS12 *ctx = (KDF_PKCS12 *)vctx; + const EVP_MD *md; + + if (!ossl_prov_is_running() || !kdf_pkcs12_set_ctx_params(ctx, params)) + return 0; + + if (ctx->pass == NULL) { + ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_PASS); + return 0; + } + + if (ctx->salt == NULL) { + ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_SALT); + return 0; + } + + md = ossl_prov_digest_md(&ctx->digest); + return pkcs12kdf_derive(ctx->pass, ctx->pass_len, ctx->salt, ctx->salt_len, + ctx->id, ctx->iter, md, key, keylen); +} + +static int kdf_pkcs12_set_ctx_params(void *vctx, const OSSL_PARAM params[]) +{ + const OSSL_PARAM *p; + KDF_PKCS12 *ctx = vctx; + OSSL_LIB_CTX *provctx = PROV_LIBCTX_OF(ctx->provctx); + + if (ossl_param_is_empty(params)) + return 1; + + if (!ossl_prov_digest_load_from_params(&ctx->digest, params, provctx)) + return 0; + + if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_PASSWORD)) != NULL) + if (!pkcs12kdf_set_membuf(&ctx->pass, &ctx->pass_len, p)) + return 0; + + if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_SALT)) != NULL) + if (!pkcs12kdf_set_membuf(&ctx->salt, &ctx->salt_len, p)) + return 0; + + if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_PKCS12_ID)) != NULL) + if (!OSSL_PARAM_get_int(p, &ctx->id)) + return 0; + + if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_ITER)) != NULL) + if (!OSSL_PARAM_get_uint64(p, &ctx->iter)) + return 0; + return 1; +} + +static const OSSL_PARAM *kdf_pkcs12_settable_ctx_params( + ossl_unused void *ctx, ossl_unused void *provctx) +{ + static const OSSL_PARAM known_settable_ctx_params[] = { + OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_PROPERTIES, NULL, 0), + OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_DIGEST, NULL, 0), + OSSL_PARAM_octet_string(OSSL_KDF_PARAM_PASSWORD, NULL, 0), + OSSL_PARAM_octet_string(OSSL_KDF_PARAM_SALT, NULL, 0), + OSSL_PARAM_uint64(OSSL_KDF_PARAM_ITER, NULL), + OSSL_PARAM_int(OSSL_KDF_PARAM_PKCS12_ID, NULL), + OSSL_PARAM_END + }; + return known_settable_ctx_params; +} + +static int kdf_pkcs12_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; +} + +static const OSSL_PARAM *kdf_pkcs12_gettable_ctx_params( + ossl_unused void *ctx, ossl_unused void *provctx) +{ + static const OSSL_PARAM known_gettable_ctx_params[] = { + OSSL_PARAM_size_t(OSSL_KDF_PARAM_SIZE, NULL), + OSSL_PARAM_END + }; + return known_gettable_ctx_params; +} + +const OSSL_DISPATCH ossl_kdf_pkcs12_functions[] = { + { OSSL_FUNC_KDF_NEWCTX, (void(*)(void))kdf_pkcs12_new }, + { OSSL_FUNC_KDF_DUPCTX, (void(*)(void))kdf_pkcs12_dup }, + { OSSL_FUNC_KDF_FREECTX, (void(*)(void))kdf_pkcs12_free }, + { OSSL_FUNC_KDF_RESET, (void(*)(void))kdf_pkcs12_reset }, + { OSSL_FUNC_KDF_DERIVE, (void(*)(void))kdf_pkcs12_derive }, + { OSSL_FUNC_KDF_SETTABLE_CTX_PARAMS, + (void(*)(void))kdf_pkcs12_settable_ctx_params }, + { OSSL_FUNC_KDF_SET_CTX_PARAMS, (void(*)(void))kdf_pkcs12_set_ctx_params }, + { OSSL_FUNC_KDF_GETTABLE_CTX_PARAMS, + (void(*)(void))kdf_pkcs12_gettable_ctx_params }, + { OSSL_FUNC_KDF_GET_CTX_PARAMS, (void(*)(void))kdf_pkcs12_get_ctx_params }, + OSSL_DISPATCH_END +}; 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