diff options
Diffstat (limited to 'crypto/openssl/providers/implementations/ciphers/cipher_rc2.c')
| -rw-r--r-- | crypto/openssl/providers/implementations/ciphers/cipher_rc2.c | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/crypto/openssl/providers/implementations/ciphers/cipher_rc2.c b/crypto/openssl/providers/implementations/ciphers/cipher_rc2.c new file mode 100644 index 000000000000..106f47e8667a --- /dev/null +++ b/crypto/openssl/providers/implementations/ciphers/cipher_rc2.c @@ -0,0 +1,283 @@ +/* + * Copyright 2019-2021 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 + */ + +/* Dispatch functions for RC2 cipher modes ecb, cbc, ofb, cfb */ + +/* + * RC2 low level APIs are deprecated for public use, but still ok for internal + * use. + */ +#include "internal/deprecated.h" + +#include <openssl/proverr.h> +#include "cipher_rc2.h" +#include "prov/implementations.h" +#include "prov/providercommon.h" + +#define RC2_40_MAGIC 0xa0 +#define RC2_64_MAGIC 0x78 +#define RC2_128_MAGIC 0x3a +#define RC2_FLAGS PROV_CIPHER_FLAG_VARIABLE_LENGTH + +static OSSL_FUNC_cipher_encrypt_init_fn rc2_einit; +static OSSL_FUNC_cipher_decrypt_init_fn rc2_dinit; +static OSSL_FUNC_cipher_freectx_fn rc2_freectx; +static OSSL_FUNC_cipher_dupctx_fn rc2_dupctx; +static OSSL_FUNC_cipher_gettable_ctx_params_fn rc2_gettable_ctx_params; +static OSSL_FUNC_cipher_settable_ctx_params_fn rc2_settable_ctx_params; +static OSSL_FUNC_cipher_set_ctx_params_fn rc2_set_ctx_params; + +static void rc2_freectx(void *vctx) +{ + PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx; + + ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx); + OPENSSL_clear_free(ctx, sizeof(*ctx)); +} + +static void *rc2_dupctx(void *ctx) +{ + PROV_RC2_CTX *in = (PROV_RC2_CTX *)ctx; + PROV_RC2_CTX *ret; + + if (!ossl_prov_is_running()) + return NULL; + + ret = OPENSSL_malloc(sizeof(*ret)); + if (ret == NULL) { + ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); + return NULL; + } + *ret = *in; + + return ret; +} + +static int rc2_keybits_to_magic(int keybits) +{ + switch (keybits) { + case 128: + return RC2_128_MAGIC; + case 64: + return RC2_64_MAGIC; + case 40: + return RC2_40_MAGIC; + } + ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE); + return 0; +} + +static int rc2_magic_to_keybits(int magic) +{ + switch (magic) { + case RC2_128_MAGIC: + return 128; + case RC2_64_MAGIC: + return 64; + case RC2_40_MAGIC: + return 40; + } + ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_KEY_SIZE); + return 0; +} + +static int rc2_einit(void *ctx, const unsigned char *key, size_t keylen, + const unsigned char *iv, size_t ivlen, + const OSSL_PARAM params[]) +{ + if (!ossl_cipher_generic_einit(ctx, key, keylen, iv, ivlen, NULL)) + return 0; + return rc2_set_ctx_params(ctx, params); +} + +static int rc2_dinit(void *ctx, const unsigned char *key, size_t keylen, + const unsigned char *iv, size_t ivlen, + const OSSL_PARAM params[]) +{ + if (!ossl_cipher_generic_dinit(ctx, key, keylen, iv, ivlen, NULL)) + return 0; + return rc2_set_ctx_params(ctx, params); +} + +static int rc2_get_ctx_params(void *vctx, OSSL_PARAM params[]) +{ + PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx; + OSSL_PARAM *p; + + if (!ossl_cipher_generic_get_ctx_params(vctx, params)) + return 0; + p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RC2_KEYBITS); + if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->key_bits)) { + ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER); + return 0; + } + p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS); + if (p != NULL) { + long num; + int i; + ASN1_TYPE *type; + unsigned char *d = p->data; + unsigned char **dd = d == NULL ? NULL : &d; + + if (p->data_type != OSSL_PARAM_OCTET_STRING) { + ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER); + return 0; + } + if ((type = ASN1_TYPE_new()) == NULL) { + ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); + return 0; + } + + /* Is this the original IV or the running IV? */ + num = rc2_keybits_to_magic(ctx->key_bits); + if (!ASN1_TYPE_set_int_octetstring(type, num, + ctx->base.iv, ctx->base.ivlen)) { + ASN1_TYPE_free(type); + ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE); + return 0; + } + /* + * IF the caller has a buffer, we pray to the gods they got the + * size right. There's no way to tell the i2d functions... + */ + i = i2d_ASN1_TYPE(type, dd); + if (i >= 0) + p->return_size = (size_t)i; + + ASN1_TYPE_free(type); + if (i < 0) { + ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER); + return 0; + } + } + return 1; +} + +static int rc2_set_ctx_params(void *vctx, const OSSL_PARAM params[]) +{ + PROV_RC2_CTX *ctx = (PROV_RC2_CTX *)vctx; + const OSSL_PARAM *p; + + if (params == NULL) + return 1; + + if (!ossl_cipher_var_keylen_set_ctx_params(vctx, params)) + return 0; + p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_RC2_KEYBITS); + if (p != NULL) { + if (!OSSL_PARAM_get_size_t(p, &ctx->key_bits)) { + ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER); + return 0; + } + } + p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS); + if (p != NULL) { + ASN1_TYPE *type = NULL; + long num = 0; + const unsigned char *d = p->data; + int ret = 1; + unsigned char iv[16]; + + if (p->data_type != OSSL_PARAM_OCTET_STRING + || ctx->base.ivlen > sizeof(iv) + || (type = d2i_ASN1_TYPE(NULL, &d, p->data_size)) == NULL + || ((size_t)ASN1_TYPE_get_int_octetstring(type, &num, iv, + ctx->base.ivlen) + != ctx->base.ivlen) + || !ossl_cipher_generic_initiv(&ctx->base, iv, ctx->base.ivlen) + || (ctx->key_bits = rc2_magic_to_keybits(num)) == 0) { + ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER); + ret = 0; + } + ASN1_TYPE_free(type); + if (ret == 0) + return 0; + /* + * This code assumes that the caller will call + * EVP_CipherInit_ex() with a non NULL key in order to setup a key that + * uses the keylen and keybits that were set here. + */ + ctx->base.keylen = ctx->key_bits / 8; + } + return 1; +} + +CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc2) +OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL), +OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS, NULL, 0), +CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc2) + +CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc2) +OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL), +OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, NULL), +OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS, NULL, 0), +CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc2) + +#define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, blkbits, \ + ivbits, typ) \ +static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \ +static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \ +{ \ + return ossl_cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, \ + flags, kbits, blkbits, ivbits); \ +} \ +static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \ +static void * alg##_##kbits##_##lcmode##_newctx(void *provctx) \ +{ \ + PROV_##UCALG##_CTX *ctx; \ + if (!ossl_prov_is_running()) \ + return NULL; \ + ctx = OPENSSL_zalloc(sizeof(*ctx)); \ + if (ctx != NULL) { \ + ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \ + EVP_CIPH_##UCMODE##_MODE, flags, \ + ossl_prov_cipher_hw_##alg##_##lcmode(kbits), \ + NULL); \ + ctx->key_bits = kbits; \ + } \ + return ctx; \ +} \ +const OSSL_DISPATCH ossl_##alg##kbits##lcmode##_functions[] = { \ + { OSSL_FUNC_CIPHER_NEWCTX, \ + (void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \ + { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \ + { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \ + { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))rc2_einit }, \ + { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))rc2_dinit }, \ + { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))ossl_cipher_generic_##typ##_update },\ + { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##typ##_final }, \ + { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \ + { OSSL_FUNC_CIPHER_GET_PARAMS, \ + (void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \ + { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \ + (void (*)(void))ossl_cipher_generic_gettable_params }, \ + { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \ + (void (*)(void))rc2_get_ctx_params }, \ + { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \ + (void (*)(void))rc2_gettable_ctx_params }, \ + { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \ + (void (*)(void))rc2_set_ctx_params }, \ + { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \ + (void (*)(void))rc2_settable_ctx_params }, \ + { 0, NULL } \ +}; + +/* ossl_rc2128ecb_functions */ +IMPLEMENT_cipher(rc2, RC2, ecb, ECB, RC2_FLAGS, 128, 64, 0, block) +/* ossl_rc2128cbc_functions */ +IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 128, 64, 64, block) +/* ossl_rc240cbc_functions */ +IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 40, 64, 64, block) +/* ossl_rc264cbc_functions */ +IMPLEMENT_cipher(rc2, RC2, cbc, CBC, RC2_FLAGS, 64, 64, 64, block) + +/* ossl_rc2128ofb128_functions */ +IMPLEMENT_cipher(rc2, RC2, ofb128, OFB, RC2_FLAGS, 128, 8, 64, stream) +/* ossl_rc2128cfb128_functions */ +IMPLEMENT_cipher(rc2, RC2, cfb128, CFB, RC2_FLAGS, 128, 8, 64, stream) |