| /* |
| * Copyright 1995-2021 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 |
| */ |
| |
| /* We need to use some engine deprecated APIs */ |
| #define OPENSSL_SUPPRESS_DEPRECATED |
| |
| #include <stdio.h> |
| #include <limits.h> |
| #include <assert.h> |
| #include <openssl/evp.h> |
| #include <openssl/err.h> |
| #include <openssl/rand.h> |
| #ifndef FIPS_MODULE |
| # include <openssl/engine.h> |
| #endif |
| #include <openssl/params.h> |
| #include <openssl/core_names.h> |
| #include "internal/cryptlib.h" |
| #include "internal/provider.h" |
| #include "internal/core.h" |
| #include "internal/safe_math.h" |
| #include "crypto/evp.h" |
| #include "evp_local.h" |
| |
| OSSL_SAFE_MATH_SIGNED(int, int) |
| |
| int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) |
| { |
| if (ctx == NULL) |
| return 1; |
| |
| if (ctx->cipher == NULL || ctx->cipher->prov == NULL) |
| goto legacy; |
| |
| if (ctx->algctx != NULL) { |
| if (ctx->cipher->freectx != NULL) |
| ctx->cipher->freectx(ctx->algctx); |
| ctx->algctx = NULL; |
| } |
| if (ctx->fetched_cipher != NULL) |
| EVP_CIPHER_free(ctx->fetched_cipher); |
| memset(ctx, 0, sizeof(*ctx)); |
| ctx->iv_len = -1; |
| |
| return 1; |
| |
| /* Remove legacy code below when legacy support is removed. */ |
| legacy: |
| |
| if (ctx->cipher != NULL) { |
| if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx)) |
| return 0; |
| /* Cleanse cipher context data */ |
| if (ctx->cipher_data && ctx->cipher->ctx_size) |
| OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size); |
| } |
| OPENSSL_free(ctx->cipher_data); |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| ENGINE_finish(ctx->engine); |
| #endif |
| memset(ctx, 0, sizeof(*ctx)); |
| ctx->iv_len = -1; |
| return 1; |
| } |
| |
| EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) |
| { |
| EVP_CIPHER_CTX *ctx; |
| |
| ctx = OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX)); |
| if (ctx == NULL) |
| return NULL; |
| |
| ctx->iv_len = -1; |
| return ctx; |
| } |
| |
| void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) |
| { |
| if (ctx == NULL) |
| return; |
| EVP_CIPHER_CTX_reset(ctx); |
| OPENSSL_free(ctx); |
| } |
| |
| static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx, |
| const EVP_CIPHER *cipher, |
| ENGINE *impl, const unsigned char *key, |
| const unsigned char *iv, int enc, |
| const OSSL_PARAM params[]) |
| { |
| int n; |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| ENGINE *tmpimpl = NULL; |
| #endif |
| |
| /* |
| * enc == 1 means we are encrypting. |
| * enc == 0 means we are decrypting. |
| * enc == -1 means, use the previously initialised value for encrypt/decrypt |
| */ |
| if (enc == -1) { |
| enc = ctx->encrypt; |
| } else { |
| if (enc) |
| enc = 1; |
| ctx->encrypt = enc; |
| } |
| |
| if (cipher == NULL && ctx->cipher == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
| return 0; |
| } |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| /* |
| * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so |
| * this context may already have an ENGINE! Try to avoid releasing the |
| * previous handle, re-querying for an ENGINE, and having a |
| * reinitialisation, when it may all be unnecessary. |
| */ |
| if (ctx->engine && ctx->cipher |
| && (cipher == NULL || cipher->nid == ctx->cipher->nid)) |
| goto skip_to_init; |
| |
| if (cipher != NULL && impl == NULL) { |
| /* Ask if an ENGINE is reserved for this job */ |
| tmpimpl = ENGINE_get_cipher_engine(cipher->nid); |
| } |
| #endif |
| |
| /* |
| * If there are engines involved then we should use legacy handling for now. |
| */ |
| if (ctx->engine != NULL |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| || tmpimpl != NULL |
| #endif |
| || impl != NULL) { |
| if (ctx->cipher == ctx->fetched_cipher) |
| ctx->cipher = NULL; |
| EVP_CIPHER_free(ctx->fetched_cipher); |
| ctx->fetched_cipher = NULL; |
| goto legacy; |
| } |
| /* |
| * Ensure a context left lying around from last time is cleared |
| * (legacy code) |
| */ |
| if (cipher != NULL && ctx->cipher != NULL) { |
| OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size); |
| ctx->cipher_data = NULL; |
| } |
| |
| |
| /* Start of non-legacy code below */ |
| |
| /* Ensure a context left lying around from last time is cleared */ |
| if (cipher != NULL && ctx->cipher != NULL) { |
| unsigned long flags = ctx->flags; |
| |
| EVP_CIPHER_CTX_reset(ctx); |
| /* Restore encrypt and flags */ |
| ctx->encrypt = enc; |
| ctx->flags = flags; |
| } |
| |
| if (cipher == NULL) |
| cipher = ctx->cipher; |
| |
| if (cipher->prov == NULL) { |
| #ifdef FIPS_MODULE |
| /* We only do explicit fetches inside the FIPS module */ |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| #else |
| EVP_CIPHER *provciph = |
| EVP_CIPHER_fetch(NULL, |
| cipher->nid == NID_undef ? "NULL" |
| : OBJ_nid2sn(cipher->nid), |
| ""); |
| |
| if (provciph == NULL) |
| return 0; |
| cipher = provciph; |
| EVP_CIPHER_free(ctx->fetched_cipher); |
| ctx->fetched_cipher = provciph; |
| #endif |
| } |
| |
| if (cipher->prov != NULL) { |
| if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| EVP_CIPHER_free(ctx->fetched_cipher); |
| ctx->fetched_cipher = (EVP_CIPHER *)cipher; |
| } |
| ctx->cipher = cipher; |
| if (ctx->algctx == NULL) { |
| ctx->algctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov)); |
| if (ctx->algctx == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| } |
| |
| if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) { |
| /* |
| * If this ctx was already set up for no padding then we need to tell |
| * the new cipher about it. |
| */ |
| if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) |
| return 0; |
| } |
| |
| if (enc) { |
| if (ctx->cipher->einit == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| |
| return ctx->cipher->einit(ctx->algctx, |
| key, |
| key == NULL ? 0 |
| : EVP_CIPHER_CTX_get_key_length(ctx), |
| iv, |
| iv == NULL ? 0 |
| : EVP_CIPHER_CTX_get_iv_length(ctx), |
| params); |
| } |
| |
| if (ctx->cipher->dinit == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| |
| return ctx->cipher->dinit(ctx->algctx, |
| key, |
| key == NULL ? 0 |
| : EVP_CIPHER_CTX_get_key_length(ctx), |
| iv, |
| iv == NULL ? 0 |
| : EVP_CIPHER_CTX_get_iv_length(ctx), |
| params); |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| |
| if (cipher != NULL) { |
| /* |
| * Ensure a context left lying around from last time is cleared (we |
| * previously attempted to avoid this if the same ENGINE and |
| * EVP_CIPHER could be used). |
| */ |
| if (ctx->cipher) { |
| unsigned long flags = ctx->flags; |
| EVP_CIPHER_CTX_reset(ctx); |
| /* Restore encrypt and flags */ |
| ctx->encrypt = enc; |
| ctx->flags = flags; |
| } |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| if (impl != NULL) { |
| if (!ENGINE_init(impl)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| } else { |
| impl = tmpimpl; |
| } |
| if (impl != NULL) { |
| /* There's an ENGINE for this job ... (apparently) */ |
| const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid); |
| |
| if (c == NULL) { |
| /* |
| * One positive side-effect of US's export control history, |
| * is that we should at least be able to avoid using US |
| * misspellings of "initialisation"? |
| */ |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| /* We'll use the ENGINE's private cipher definition */ |
| cipher = c; |
| /* |
| * Store the ENGINE functional reference so we know 'cipher' came |
| * from an ENGINE and we need to release it when done. |
| */ |
| ctx->engine = impl; |
| } else { |
| ctx->engine = NULL; |
| } |
| #endif |
| |
| ctx->cipher = cipher; |
| if (ctx->cipher->ctx_size) { |
| ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); |
| if (ctx->cipher_data == NULL) { |
| ctx->cipher = NULL; |
| ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| } else { |
| ctx->cipher_data = NULL; |
| } |
| ctx->key_len = cipher->key_len; |
| /* Preserve wrap enable flag, zero everything else */ |
| ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW; |
| if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) { |
| if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) { |
| ctx->cipher = NULL; |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| } |
| } |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| skip_to_init: |
| #endif |
| if (ctx->cipher == NULL) |
| return 0; |
| |
| /* we assume block size is a power of 2 in *cryptUpdate */ |
| OPENSSL_assert(ctx->cipher->block_size == 1 |
| || ctx->cipher->block_size == 8 |
| || ctx->cipher->block_size == 16); |
| |
| if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW) |
| && EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_WRAP_MODE) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED); |
| return 0; |
| } |
| |
| if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx)) |
| & EVP_CIPH_CUSTOM_IV) == 0) { |
| switch (EVP_CIPHER_CTX_get_mode(ctx)) { |
| |
| case EVP_CIPH_STREAM_CIPHER: |
| case EVP_CIPH_ECB_MODE: |
| break; |
| |
| case EVP_CIPH_CFB_MODE: |
| case EVP_CIPH_OFB_MODE: |
| |
| ctx->num = 0; |
| /* fall-through */ |
| |
| case EVP_CIPH_CBC_MODE: |
| n = EVP_CIPHER_CTX_get_iv_length(ctx); |
| if (n < 0 || n > (int)sizeof(ctx->iv)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH); |
| return 0; |
| } |
| if (iv != NULL) |
| memcpy(ctx->oiv, iv, n); |
| memcpy(ctx->iv, ctx->oiv, n); |
| break; |
| |
| case EVP_CIPH_CTR_MODE: |
| ctx->num = 0; |
| /* Don't reuse IV for CTR mode */ |
| if (iv != NULL) { |
| n = EVP_CIPHER_CTX_get_iv_length(ctx); |
| if (n <= 0 || n > (int)sizeof(ctx->iv)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH); |
| return 0; |
| } |
| memcpy(ctx->iv, iv, n); |
| } |
| break; |
| |
| default: |
| return 0; |
| } |
| } |
| |
| if (key != NULL || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { |
| if (!ctx->cipher->init(ctx, key, iv, enc)) |
| return 0; |
| } |
| ctx->buf_len = 0; |
| ctx->final_used = 0; |
| ctx->block_mask = ctx->cipher->block_size - 1; |
| return 1; |
| } |
| |
| int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
| const unsigned char *key, const unsigned char *iv, |
| int enc, const OSSL_PARAM params[]) |
| { |
| return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, params); |
| } |
| |
| int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
| const unsigned char *key, const unsigned char *iv, int enc) |
| { |
| if (cipher != NULL) |
| EVP_CIPHER_CTX_reset(ctx); |
| return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, NULL); |
| } |
| |
| int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
| ENGINE *impl, const unsigned char *key, |
| const unsigned char *iv, int enc) |
| { |
| return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, NULL); |
| } |
| |
| int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
| const unsigned char *in, int inl) |
| { |
| if (ctx->encrypt) |
| return EVP_EncryptUpdate(ctx, out, outl, in, inl); |
| else |
| return EVP_DecryptUpdate(ctx, out, outl, in, inl); |
| } |
| |
| int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
| { |
| if (ctx->encrypt) |
| return EVP_EncryptFinal_ex(ctx, out, outl); |
| else |
| return EVP_DecryptFinal_ex(ctx, out, outl); |
| } |
| |
| int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
| { |
| if (ctx->encrypt) |
| return EVP_EncryptFinal(ctx, out, outl); |
| else |
| return EVP_DecryptFinal(ctx, out, outl); |
| } |
| |
| int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
| const unsigned char *key, const unsigned char *iv) |
| { |
| return EVP_CipherInit(ctx, cipher, key, iv, 1); |
| } |
| |
| int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
| ENGINE *impl, const unsigned char *key, |
| const unsigned char *iv) |
| { |
| return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1); |
| } |
| |
| int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
| const unsigned char *key, const unsigned char *iv, |
| const OSSL_PARAM params[]) |
| { |
| return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params); |
| } |
| |
| int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
| const unsigned char *key, const unsigned char *iv) |
| { |
| return EVP_CipherInit(ctx, cipher, key, iv, 0); |
| } |
| |
| int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
| ENGINE *impl, const unsigned char *key, |
| const unsigned char *iv) |
| { |
| return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0); |
| } |
| |
| int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, |
| const unsigned char *key, const unsigned char *iv, |
| const OSSL_PARAM params[]) |
| { |
| return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params); |
| } |
| |
| /* |
| * According to the letter of standard difference between pointers |
| * is specified to be valid only within same object. This makes |
| * it formally challenging to determine if input and output buffers |
| * are not partially overlapping with standard pointer arithmetic. |
| */ |
| #ifdef PTRDIFF_T |
| # undef PTRDIFF_T |
| #endif |
| #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64 |
| /* |
| * Then we have VMS that distinguishes itself by adhering to |
| * sizeof(size_t)==4 even in 64-bit builds, which means that |
| * difference between two pointers might be truncated to 32 bits. |
| * In the context one can even wonder how comparison for |
| * equality is implemented. To be on the safe side we adhere to |
| * PTRDIFF_T even for comparison for equality. |
| */ |
| # define PTRDIFF_T uint64_t |
| #else |
| # define PTRDIFF_T size_t |
| #endif |
| |
| int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len) |
| { |
| PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; |
| /* |
| * Check for partially overlapping buffers. [Binary logical |
| * operations are used instead of boolean to minimize number |
| * of conditional branches.] |
| */ |
| int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) | |
| (diff > (0 - (PTRDIFF_T)len))); |
| |
| return overlapped; |
| } |
| |
| static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, |
| unsigned char *out, int *outl, |
| const unsigned char *in, int inl) |
| { |
| int i, j, bl, cmpl = inl; |
| |
| if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
| cmpl = safe_div_round_up_int(cmpl, 8, NULL); |
| |
| bl = ctx->cipher->block_size; |
| |
| if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
| /* If block size > 1 then the cipher will have to do this check */ |
| if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
| return 0; |
| } |
| |
| i = ctx->cipher->do_cipher(ctx, out, in, inl); |
| if (i < 0) |
| return 0; |
| else |
| *outl = i; |
| return 1; |
| } |
| |
| if (inl <= 0) { |
| *outl = 0; |
| return inl == 0; |
| } |
| if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
| return 0; |
| } |
| |
| if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) { |
| if (ctx->cipher->do_cipher(ctx, out, in, inl)) { |
| *outl = inl; |
| return 1; |
| } else { |
| *outl = 0; |
| return 0; |
| } |
| } |
| i = ctx->buf_len; |
| OPENSSL_assert(bl <= (int)sizeof(ctx->buf)); |
| if (i != 0) { |
| if (bl - i > inl) { |
| memcpy(&(ctx->buf[i]), in, inl); |
| ctx->buf_len += inl; |
| *outl = 0; |
| return 1; |
| } else { |
| j = bl - i; |
| |
| /* |
| * Once we've processed the first j bytes from in, the amount of |
| * data left that is a multiple of the block length is: |
| * (inl - j) & ~(bl - 1) |
| * We must ensure that this amount of data, plus the one block that |
| * we process from ctx->buf does not exceed INT_MAX |
| */ |
| if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); |
| return 0; |
| } |
| memcpy(&(ctx->buf[i]), in, j); |
| inl -= j; |
| in += j; |
| if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl)) |
| return 0; |
| out += bl; |
| *outl = bl; |
| } |
| } else |
| *outl = 0; |
| i = inl & (bl - 1); |
| inl -= i; |
| if (inl > 0) { |
| if (!ctx->cipher->do_cipher(ctx, out, in, inl)) |
| return 0; |
| *outl += inl; |
| } |
| |
| if (i != 0) |
| memcpy(ctx->buf, &(in[inl]), i); |
| ctx->buf_len = i; |
| return 1; |
| } |
| |
| |
| int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
| const unsigned char *in, int inl) |
| { |
| int ret; |
| size_t soutl, inl_ = (size_t)inl; |
| int blocksize; |
| |
| if (outl != NULL) { |
| *outl = 0; |
| } else { |
| ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
| return 0; |
| } |
| |
| /* Prevent accidental use of decryption context when encrypting */ |
| if (!ctx->encrypt) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
| return 0; |
| } |
| |
| if (ctx->cipher == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
| return 0; |
| } |
| |
| if (ctx->cipher->prov == NULL) |
| goto legacy; |
| |
| blocksize = ctx->cipher->block_size; |
| |
| if (ctx->cipher->cupdate == NULL || blocksize < 1) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
| return 0; |
| } |
| |
| ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl, |
| inl_ + (size_t)(blocksize == 1 ? 0 : blocksize), |
| in, inl_); |
| |
| if (ret) { |
| if (soutl > INT_MAX) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
| return 0; |
| } |
| *outl = soutl; |
| } |
| |
| return ret; |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| |
| return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
| } |
| |
| int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
| { |
| int ret; |
| ret = EVP_EncryptFinal_ex(ctx, out, outl); |
| return ret; |
| } |
| |
| int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
| { |
| int n, ret; |
| unsigned int i, b, bl; |
| size_t soutl; |
| int blocksize; |
| |
| if (outl != NULL) { |
| *outl = 0; |
| } else { |
| ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
| return 0; |
| } |
| |
| /* Prevent accidental use of decryption context when encrypting */ |
| if (!ctx->encrypt) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
| return 0; |
| } |
| |
| if (ctx->cipher == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
| return 0; |
| } |
| if (ctx->cipher->prov == NULL) |
| goto legacy; |
| |
| blocksize = EVP_CIPHER_CTX_get_block_size(ctx); |
| |
| if (blocksize < 1 || ctx->cipher->cfinal == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
| return 0; |
| } |
| |
| ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl, |
| blocksize == 1 ? 0 : blocksize); |
| |
| if (ret) { |
| if (soutl > INT_MAX) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
| return 0; |
| } |
| *outl = soutl; |
| } |
| |
| return ret; |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| |
| if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
| ret = ctx->cipher->do_cipher(ctx, out, NULL, 0); |
| if (ret < 0) |
| return 0; |
| else |
| *outl = ret; |
| return 1; |
| } |
| |
| b = ctx->cipher->block_size; |
| OPENSSL_assert(b <= sizeof(ctx->buf)); |
| if (b == 1) { |
| *outl = 0; |
| return 1; |
| } |
| bl = ctx->buf_len; |
| if (ctx->flags & EVP_CIPH_NO_PADDING) { |
| if (bl) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); |
| return 0; |
| } |
| *outl = 0; |
| return 1; |
| } |
| |
| n = b - bl; |
| for (i = bl; i < b; i++) |
| ctx->buf[i] = n; |
| ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b); |
| |
| if (ret) |
| *outl = b; |
| |
| return ret; |
| } |
| |
| int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, |
| const unsigned char *in, int inl) |
| { |
| int fix_len, cmpl = inl, ret; |
| unsigned int b; |
| size_t soutl, inl_ = (size_t)inl; |
| int blocksize; |
| |
| if (outl != NULL) { |
| *outl = 0; |
| } else { |
| ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
| return 0; |
| } |
| |
| /* Prevent accidental use of encryption context when decrypting */ |
| if (ctx->encrypt) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
| return 0; |
| } |
| |
| if (ctx->cipher == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
| return 0; |
| } |
| if (ctx->cipher->prov == NULL) |
| goto legacy; |
| |
| blocksize = EVP_CIPHER_CTX_get_block_size(ctx); |
| |
| if (ctx->cipher->cupdate == NULL || blocksize < 1) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
| return 0; |
| } |
| ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl, |
| inl_ + (size_t)(blocksize == 1 ? 0 : blocksize), |
| in, inl_); |
| |
| if (ret) { |
| if (soutl > INT_MAX) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
| return 0; |
| } |
| *outl = soutl; |
| } |
| |
| return ret; |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| |
| b = ctx->cipher->block_size; |
| |
| if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) |
| cmpl = safe_div_round_up_int(cmpl, 8, NULL); |
| |
| if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
| if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
| return 0; |
| } |
| |
| fix_len = ctx->cipher->do_cipher(ctx, out, in, inl); |
| if (fix_len < 0) { |
| *outl = 0; |
| return 0; |
| } else |
| *outl = fix_len; |
| return 1; |
| } |
| |
| if (inl <= 0) { |
| *outl = 0; |
| return inl == 0; |
| } |
| |
| if (ctx->flags & EVP_CIPH_NO_PADDING) |
| return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl); |
| |
| OPENSSL_assert(b <= sizeof(ctx->final)); |
| |
| if (ctx->final_used) { |
| /* see comment about PTRDIFF_T comparison above */ |
| if (((PTRDIFF_T)out == (PTRDIFF_T)in) |
| || ossl_is_partially_overlapping(out, in, b)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); |
| return 0; |
| } |
| /* |
| * final_used is only ever set if buf_len is 0. Therefore the maximum |
| * length output we will ever see from evp_EncryptDecryptUpdate is |
| * the maximum multiple of the block length that is <= inl, or just: |
| * inl & ~(b - 1) |
| * Since final_used has been set then the final output length is: |
| * (inl & ~(b - 1)) + b |
| * This must never exceed INT_MAX |
| */ |
| if ((inl & ~(b - 1)) > INT_MAX - b) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); |
| return 0; |
| } |
| memcpy(out, ctx->final, b); |
| out += b; |
| fix_len = 1; |
| } else |
| fix_len = 0; |
| |
| if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl)) |
| return 0; |
| |
| /* |
| * if we have 'decrypted' a multiple of block size, make sure we have a |
| * copy of this last block |
| */ |
| if (b > 1 && !ctx->buf_len) { |
| *outl -= b; |
| ctx->final_used = 1; |
| memcpy(ctx->final, &out[*outl], b); |
| } else |
| ctx->final_used = 0; |
| |
| if (fix_len) |
| *outl += b; |
| |
| return 1; |
| } |
| |
| int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
| { |
| int ret; |
| ret = EVP_DecryptFinal_ex(ctx, out, outl); |
| return ret; |
| } |
| |
| int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) |
| { |
| int i, n; |
| unsigned int b; |
| size_t soutl; |
| int ret; |
| int blocksize; |
| |
| if (outl != NULL) { |
| *outl = 0; |
| } else { |
| ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
| return 0; |
| } |
| |
| /* Prevent accidental use of encryption context when decrypting */ |
| if (ctx->encrypt) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); |
| return 0; |
| } |
| |
| if (ctx->cipher == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
| return 0; |
| } |
| |
| if (ctx->cipher->prov == NULL) |
| goto legacy; |
| |
| blocksize = EVP_CIPHER_CTX_get_block_size(ctx); |
| |
| if (blocksize < 1 || ctx->cipher->cfinal == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
| return 0; |
| } |
| |
| ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl, |
| blocksize == 1 ? 0 : blocksize); |
| |
| if (ret) { |
| if (soutl > INT_MAX) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
| return 0; |
| } |
| *outl = soutl; |
| } |
| |
| return ret; |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| |
| *outl = 0; |
| if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { |
| i = ctx->cipher->do_cipher(ctx, out, NULL, 0); |
| if (i < 0) |
| return 0; |
| else |
| *outl = i; |
| return 1; |
| } |
| |
| b = ctx->cipher->block_size; |
| if (ctx->flags & EVP_CIPH_NO_PADDING) { |
| if (ctx->buf_len) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); |
| return 0; |
| } |
| *outl = 0; |
| return 1; |
| } |
| if (b > 1) { |
| if (ctx->buf_len || !ctx->final_used) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH); |
| return 0; |
| } |
| OPENSSL_assert(b <= sizeof(ctx->final)); |
| |
| /* |
| * The following assumes that the ciphertext has been authenticated. |
| * Otherwise it provides a padding oracle. |
| */ |
| n = ctx->final[b - 1]; |
| if (n == 0 || n > (int)b) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); |
| return 0; |
| } |
| for (i = 0; i < n; i++) { |
| if (ctx->final[--b] != n) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); |
| return 0; |
| } |
| } |
| n = ctx->cipher->block_size - n; |
| for (i = 0; i < n; i++) |
| out[i] = ctx->final[i]; |
| *outl = n; |
| } else |
| *outl = 0; |
| return 1; |
| } |
| |
| int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen) |
| { |
| if (c->cipher->prov != NULL) { |
| int ok; |
| OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
| size_t len; |
| |
| if (EVP_CIPHER_CTX_get_key_length(c) == keylen) |
| return 1; |
| |
| /* Check the cipher actually understands this parameter */ |
| if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher), |
| OSSL_CIPHER_PARAM_KEYLEN) == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH); |
| return 0; |
| } |
| |
| params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len); |
| if (!OSSL_PARAM_set_int(params, keylen)) |
| return 0; |
| ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params); |
| if (ok <= 0) |
| return 0; |
| c->key_len = keylen; |
| return 1; |
| } |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| |
| /* |
| * Note there have never been any built-in ciphers that define this flag |
| * since it was first introduced. |
| */ |
| if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH) |
| return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL); |
| if (EVP_CIPHER_CTX_get_key_length(c) == keylen) |
| return 1; |
| if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) { |
| c->key_len = keylen; |
| return 1; |
| } |
| ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH); |
| return 0; |
| } |
| |
| int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad) |
| { |
| int ok; |
| OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
| unsigned int pd = pad; |
| |
| if (pad) |
| ctx->flags &= ~EVP_CIPH_NO_PADDING; |
| else |
| ctx->flags |= EVP_CIPH_NO_PADDING; |
| |
| if (ctx->cipher != NULL && ctx->cipher->prov == NULL) |
| return 1; |
| params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd); |
| ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
| |
| return ok != 0; |
| } |
| |
| int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
| { |
| int ret = EVP_CTRL_RET_UNSUPPORTED; |
| int set_params = 1; |
| size_t sz = arg; |
| unsigned int i; |
| OSSL_PARAM params[4] = { |
| OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END |
| }; |
| |
| if (ctx == NULL || ctx->cipher == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET); |
| return 0; |
| } |
| |
| if (ctx->cipher->prov == NULL) |
| goto legacy; |
| |
| switch (type) { |
| case EVP_CTRL_SET_KEY_LENGTH: |
| params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz); |
| ctx->key_len = -1; |
| break; |
| case EVP_CTRL_RAND_KEY: /* Used by DES */ |
| set_params = 0; |
| params[0] = |
| OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, |
| ptr, sz); |
| break; |
| |
| case EVP_CTRL_INIT: |
| /* |
| * EVP_CTRL_INIT is purely legacy, no provider counterpart. |
| * As a matter of fact, this should be dead code, but some caller |
| * might still do a direct control call with this command, so... |
| * Legacy methods return 1 except for exceptional circumstances, so |
| * we do the same here to not be disruptive. |
| */ |
| return 1; |
| case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */ |
| default: |
| goto end; |
| case EVP_CTRL_AEAD_SET_IVLEN: |
| if (arg < 0) |
| return 0; |
| params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); |
| ctx->iv_len = -1; |
| break; |
| case EVP_CTRL_CCM_SET_L: |
| if (arg < 2 || arg > 8) |
| return 0; |
| sz = 15 - arg; |
| params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz); |
| ctx->iv_len = -1; |
| break; |
| case EVP_CTRL_AEAD_SET_IV_FIXED: |
| params[0] = OSSL_PARAM_construct_octet_string( |
| OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz); |
| break; |
| case EVP_CTRL_GCM_IV_GEN: |
| set_params = 0; |
| if (arg < 0) |
| sz = 0; /* special case that uses the iv length */ |
| params[0] = OSSL_PARAM_construct_octet_string( |
| OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz); |
| break; |
| case EVP_CTRL_GCM_SET_IV_INV: |
| if (arg < 0) |
| return 0; |
| params[0] = OSSL_PARAM_construct_octet_string( |
| OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz); |
| break; |
| case EVP_CTRL_GET_RC5_ROUNDS: |
| set_params = 0; /* Fall thru */ |
| case EVP_CTRL_SET_RC5_ROUNDS: |
| if (arg < 0) |
| return 0; |
| i = (unsigned int)arg; |
| params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i); |
| break; |
| case EVP_CTRL_SET_SPEED: |
| if (arg < 0) |
| return 0; |
| i = (unsigned int)arg; |
| params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i); |
| break; |
| case EVP_CTRL_AEAD_GET_TAG: |
| set_params = 0; /* Fall thru */ |
| case EVP_CTRL_AEAD_SET_TAG: |
| params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, |
| ptr, sz); |
| break; |
| case EVP_CTRL_AEAD_TLS1_AAD: |
| /* This one does a set and a get - since it returns a size */ |
| params[0] = |
| OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD, |
| ptr, sz); |
| ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
| if (ret <= 0) |
| goto end; |
| params[0] = |
| OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz); |
| ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
| if (ret <= 0) |
| goto end; |
| return sz; |
| #ifndef OPENSSL_NO_RC2 |
| case EVP_CTRL_GET_RC2_KEY_BITS: |
| set_params = 0; /* Fall thru */ |
| case EVP_CTRL_SET_RC2_KEY_BITS: |
| params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz); |
| break; |
| #endif /* OPENSSL_NO_RC2 */ |
| #if !defined(OPENSSL_NO_MULTIBLOCK) |
| case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE: |
| params[0] = OSSL_PARAM_construct_size_t( |
| OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz); |
| ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
| if (ret <= 0) |
| return 0; |
| |
| params[0] = OSSL_PARAM_construct_size_t( |
| OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz); |
| params[1] = OSSL_PARAM_construct_end(); |
| ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
| if (ret <= 0) |
| return 0; |
| return sz; |
| case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: { |
| EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = |
| (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; |
| |
| if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM)) |
| return 0; |
| |
| params[0] = OSSL_PARAM_construct_octet_string( |
| OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len); |
| params[1] = OSSL_PARAM_construct_uint( |
| OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); |
| ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
| if (ret <= 0) |
| return ret; |
| /* Retrieve the return values changed by the set */ |
| params[0] = OSSL_PARAM_construct_size_t( |
| OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz); |
| params[1] = OSSL_PARAM_construct_uint( |
| OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); |
| params[2] = OSSL_PARAM_construct_end(); |
| ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
| if (ret <= 0) |
| return 0; |
| return sz; |
| } |
| case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: { |
| EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p = |
| (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr; |
| |
| params[0] = OSSL_PARAM_construct_octet_string( |
| OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len); |
| |
| params[1] = OSSL_PARAM_construct_octet_string( |
| OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp, |
| p->len); |
| params[2] = OSSL_PARAM_construct_uint( |
| OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave); |
| ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
| if (ret <= 0) |
| return ret; |
| params[0] = OSSL_PARAM_construct_size_t( |
| OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz); |
| params[1] = OSSL_PARAM_construct_end(); |
| ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
| if (ret <= 0) |
| return 0; |
| return sz; |
| } |
| #endif /* OPENSSL_NO_MULTIBLOCK */ |
| case EVP_CTRL_AEAD_SET_MAC_KEY: |
| if (arg < 0) |
| return -1; |
| params[0] = OSSL_PARAM_construct_octet_string( |
| OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz); |
| break; |
| } |
| |
| if (set_params) |
| ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params); |
| else |
| ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params); |
| goto end; |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| if (ctx->cipher->ctrl == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED); |
| return 0; |
| } |
| |
| ret = ctx->cipher->ctrl(ctx, type, arg, ptr); |
| |
| end: |
| if (ret == EVP_CTRL_RET_UNSUPPORTED) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); |
| return 0; |
| } |
| return ret; |
| } |
| |
| int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[]) |
| { |
| if (cipher != NULL && cipher->get_params != NULL) |
| return cipher->get_params(params); |
| return 0; |
| } |
| |
| int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[]) |
| { |
| int r = 0; |
| const OSSL_PARAM *p; |
| |
| if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) { |
| r = ctx->cipher->set_ctx_params(ctx->algctx, params); |
| if (r > 0) { |
| p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN); |
| if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->key_len)) { |
| r = 0; |
| ctx->key_len = -1; |
| } |
| } |
| if (r > 0) { |
| p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN); |
| if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->iv_len)) { |
| r = 0; |
| ctx->iv_len = -1; |
| } |
| } |
| } |
| return r; |
| } |
| |
| int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[]) |
| { |
| if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL) |
| return ctx->cipher->get_ctx_params(ctx->algctx, params); |
| return 0; |
| } |
| |
| const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher) |
| { |
| if (cipher != NULL && cipher->gettable_params != NULL) |
| return cipher->gettable_params( |
| ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher))); |
| return NULL; |
| } |
| |
| const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher) |
| { |
| void *provctx; |
| |
| if (cipher != NULL && cipher->settable_ctx_params != NULL) { |
| provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)); |
| return cipher->settable_ctx_params(NULL, provctx); |
| } |
| return NULL; |
| } |
| |
| const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher) |
| { |
| void *provctx; |
| |
| if (cipher != NULL && cipher->gettable_ctx_params != NULL) { |
| provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)); |
| return cipher->gettable_ctx_params(NULL, provctx); |
| } |
| return NULL; |
| } |
| |
| const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx) |
| { |
| void *alg; |
| |
| if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) { |
| alg = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher)); |
| return cctx->cipher->settable_ctx_params(cctx->algctx, alg); |
| } |
| return NULL; |
| } |
| |
| const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx) |
| { |
| void *provctx; |
| |
| if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) { |
| provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher)); |
| return cctx->cipher->gettable_ctx_params(cctx->algctx, provctx); |
| } |
| return NULL; |
| } |
| |
| #ifndef FIPS_MODULE |
| static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx) |
| { |
| const EVP_CIPHER *cipher = ctx->cipher; |
| const OSSL_PROVIDER *prov; |
| |
| if (cipher == NULL) |
| return NULL; |
| |
| prov = EVP_CIPHER_get0_provider(cipher); |
| return ossl_provider_libctx(prov); |
| } |
| #endif |
| |
| int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key) |
| { |
| if (ctx->cipher->flags & EVP_CIPH_RAND_KEY) |
| return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key); |
| |
| #ifdef FIPS_MODULE |
| return 0; |
| #else |
| { |
| int kl; |
| OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx); |
| |
| kl = EVP_CIPHER_CTX_get_key_length(ctx); |
| if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl, 0) <= 0) |
| return 0; |
| return 1; |
| } |
| #endif /* FIPS_MODULE */ |
| } |
| |
| EVP_CIPHER_CTX *EVP_CIPHER_CTX_dup(const EVP_CIPHER_CTX *in) |
| { |
| EVP_CIPHER_CTX *out = EVP_CIPHER_CTX_new(); |
| |
| if (out != NULL && !EVP_CIPHER_CTX_copy(out, in)) { |
| EVP_CIPHER_CTX_free(out); |
| out = NULL; |
| } |
| return out; |
| } |
| |
| int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) |
| { |
| if ((in == NULL) || (in->cipher == NULL)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED); |
| return 0; |
| } |
| |
| if (in->cipher->prov == NULL) |
| goto legacy; |
| |
| if (in->cipher->dupctx == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); |
| return 0; |
| } |
| |
| EVP_CIPHER_CTX_reset(out); |
| |
| *out = *in; |
| out->algctx = NULL; |
| |
| if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) { |
| out->fetched_cipher = NULL; |
| return 0; |
| } |
| |
| out->algctx = in->cipher->dupctx(in->algctx); |
| if (out->algctx == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); |
| return 0; |
| } |
| |
| return 1; |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| /* Make sure it's safe to copy a cipher context using an ENGINE */ |
| if (in->engine && !ENGINE_init(in->engine)) { |
| ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB); |
| return 0; |
| } |
| #endif |
| |
| EVP_CIPHER_CTX_reset(out); |
| memcpy(out, in, sizeof(*out)); |
| |
| if (in->cipher_data && in->cipher->ctx_size) { |
| out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); |
| if (out->cipher_data == NULL) { |
| out->cipher = NULL; |
| ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); |
| } |
| |
| if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) |
| if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { |
| out->cipher = NULL; |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| return 1; |
| } |
| |
| EVP_CIPHER *evp_cipher_new(void) |
| { |
| EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER)); |
| |
| if (cipher != NULL) { |
| cipher->lock = CRYPTO_THREAD_lock_new(); |
| if (cipher->lock == NULL) { |
| OPENSSL_free(cipher); |
| return NULL; |
| } |
| cipher->refcnt = 1; |
| } |
| return cipher; |
| } |
| |
| /* |
| * FIPS module note: since internal fetches will be entirely |
| * provider based, we know that none of its code depends on legacy |
| * NIDs or any functionality that use them. |
| */ |
| #ifndef FIPS_MODULE |
| /* After removal of legacy support get rid of the need for legacy NIDs */ |
| static void set_legacy_nid(const char *name, void *vlegacy_nid) |
| { |
| int nid; |
| int *legacy_nid = vlegacy_nid; |
| /* |
| * We use lowest level function to get the associated method, because |
| * higher level functions such as EVP_get_cipherbyname() have changed |
| * to look at providers too. |
| */ |
| const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH); |
| |
| if (*legacy_nid == -1) /* We found a clash already */ |
| return; |
| if (legacy_method == NULL) |
| return; |
| nid = EVP_CIPHER_get_nid(legacy_method); |
| if (*legacy_nid != NID_undef && *legacy_nid != nid) { |
| *legacy_nid = -1; |
| return; |
| } |
| *legacy_nid = nid; |
| } |
| #endif |
| |
| static void *evp_cipher_from_algorithm(const int name_id, |
| const OSSL_ALGORITHM *algodef, |
| OSSL_PROVIDER *prov) |
| { |
| const OSSL_DISPATCH *fns = algodef->implementation; |
| EVP_CIPHER *cipher = NULL; |
| int fnciphcnt = 0, fnctxcnt = 0; |
| |
| if ((cipher = evp_cipher_new()) == NULL) { |
| ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
| return NULL; |
| } |
| |
| #ifndef FIPS_MODULE |
| cipher->nid = NID_undef; |
| if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid) |
| || cipher->nid == -1) { |
| ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); |
| EVP_CIPHER_free(cipher); |
| return NULL; |
| } |
| #endif |
| |
| cipher->name_id = name_id; |
| if ((cipher->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) { |
| EVP_CIPHER_free(cipher); |
| return NULL; |
| } |
| cipher->description = algodef->algorithm_description; |
| |
| for (; fns->function_id != 0; fns++) { |
| switch (fns->function_id) { |
| case OSSL_FUNC_CIPHER_NEWCTX: |
| if (cipher->newctx != NULL) |
| break; |
| cipher->newctx = OSSL_FUNC_cipher_newctx(fns); |
| fnctxcnt++; |
| break; |
| case OSSL_FUNC_CIPHER_ENCRYPT_INIT: |
| if (cipher->einit != NULL) |
| break; |
| cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns); |
| fnciphcnt++; |
| break; |
| case OSSL_FUNC_CIPHER_DECRYPT_INIT: |
| if (cipher->dinit != NULL) |
| break; |
| cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns); |
| fnciphcnt++; |
| break; |
| case OSSL_FUNC_CIPHER_UPDATE: |
| if (cipher->cupdate != NULL) |
| break; |
| cipher->cupdate = OSSL_FUNC_cipher_update(fns); |
| fnciphcnt++; |
| break; |
| case OSSL_FUNC_CIPHER_FINAL: |
| if (cipher->cfinal != NULL) |
| break; |
| cipher->cfinal = OSSL_FUNC_cipher_final(fns); |
| fnciphcnt++; |
| break; |
| case OSSL_FUNC_CIPHER_CIPHER: |
| if (cipher->ccipher != NULL) |
| break; |
| cipher->ccipher = OSSL_FUNC_cipher_cipher(fns); |
| break; |
| case OSSL_FUNC_CIPHER_FREECTX: |
| if (cipher->freectx != NULL) |
| break; |
| cipher->freectx = OSSL_FUNC_cipher_freectx(fns); |
| fnctxcnt++; |
| break; |
| case OSSL_FUNC_CIPHER_DUPCTX: |
| if (cipher->dupctx != NULL) |
| break; |
| cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns); |
| break; |
| case OSSL_FUNC_CIPHER_GET_PARAMS: |
| if (cipher->get_params != NULL) |
| break; |
| cipher->get_params = OSSL_FUNC_cipher_get_params(fns); |
| break; |
| case OSSL_FUNC_CIPHER_GET_CTX_PARAMS: |
| if (cipher->get_ctx_params != NULL) |
| break; |
| cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns); |
| break; |
| case OSSL_FUNC_CIPHER_SET_CTX_PARAMS: |
| if (cipher->set_ctx_params != NULL) |
| break; |
| cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns); |
| break; |
| case OSSL_FUNC_CIPHER_GETTABLE_PARAMS: |
| if (cipher->gettable_params != NULL) |
| break; |
| cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns); |
| break; |
| case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS: |
| if (cipher->gettable_ctx_params != NULL) |
| break; |
| cipher->gettable_ctx_params = |
| OSSL_FUNC_cipher_gettable_ctx_params(fns); |
| break; |
| case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS: |
| if (cipher->settable_ctx_params != NULL) |
| break; |
| cipher->settable_ctx_params = |
| OSSL_FUNC_cipher_settable_ctx_params(fns); |
| break; |
| } |
| } |
| if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4) |
| || (fnciphcnt == 0 && cipher->ccipher == NULL) |
| || fnctxcnt != 2) { |
| /* |
| * In order to be a consistent set of functions we must have at least |
| * a complete set of "encrypt" functions, or a complete set of "decrypt" |
| * functions, or a single "cipher" function. In all cases we need both |
| * the "newctx" and "freectx" functions. |
| */ |
| EVP_CIPHER_free(cipher); |
| ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
| return NULL; |
| } |
| cipher->prov = prov; |
| if (prov != NULL) |
| ossl_provider_up_ref(prov); |
| |
| if (!evp_cipher_cache_constants(cipher)) { |
| EVP_CIPHER_free(cipher); |
| ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED); |
| cipher = NULL; |
| } |
| |
| return cipher; |
| } |
| |
| static int evp_cipher_up_ref(void *cipher) |
| { |
| return EVP_CIPHER_up_ref(cipher); |
| } |
| |
| static void evp_cipher_free(void *cipher) |
| { |
| EVP_CIPHER_free(cipher); |
| } |
| |
| EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm, |
| const char *properties) |
| { |
| EVP_CIPHER *cipher = |
| evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties, |
| evp_cipher_from_algorithm, evp_cipher_up_ref, |
| evp_cipher_free); |
| |
| return cipher; |
| } |
| |
| int EVP_CIPHER_up_ref(EVP_CIPHER *cipher) |
| { |
| int ref = 0; |
| |
| if (cipher->origin == EVP_ORIG_DYNAMIC) |
| CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock); |
| return 1; |
| } |
| |
| void evp_cipher_free_int(EVP_CIPHER *cipher) |
| { |
| OPENSSL_free(cipher->type_name); |
| ossl_provider_free(cipher->prov); |
| CRYPTO_THREAD_lock_free(cipher->lock); |
| OPENSSL_free(cipher); |
| } |
| |
| void EVP_CIPHER_free(EVP_CIPHER *cipher) |
| { |
| int i; |
| |
| if (cipher == NULL || cipher->origin != EVP_ORIG_DYNAMIC) |
| return; |
| |
| CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock); |
| if (i > 0) |
| return; |
| evp_cipher_free_int(cipher); |
| } |
| |
| void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx, |
| void (*fn)(EVP_CIPHER *mac, void *arg), |
| void *arg) |
| { |
| evp_generic_do_all(libctx, OSSL_OP_CIPHER, |
| (void (*)(void *, void *))fn, arg, |
| evp_cipher_from_algorithm, evp_cipher_up_ref, |
| evp_cipher_free); |
| } |
