diff options
Diffstat (limited to 'crypto/evp/evp_enc.c')
| -rw-r--r-- | crypto/evp/evp_enc.c | 1273 |
1 files changed, 1136 insertions, 137 deletions
diff --git a/crypto/evp/evp_enc.c b/crypto/evp/evp_enc.c index e756624b2cdf..4e6f83e3d0a9 100644 --- a/crypto/evp/evp_enc.c +++ b/crypto/evp/evp_enc.c @@ -1,40 +1,68 @@ /* - * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved. + * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved. * - * Licensed under the OpenSSL license (the "License"). You may not use + * 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 "internal/cryptlib.h" #include <openssl/evp.h> #include <openssl/err.h> #include <openssl/rand.h> -#include <openssl/rand_drbg.h> -#include <openssl/engine.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 "crypto/evp.h" #include "evp_local.h" -int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *c) +int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx) { - if (c == NULL) + if (ctx == NULL) return 1; - if (c->cipher != NULL) { - if (c->cipher->cleanup && !c->cipher->cleanup(c)) + + 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 (c->cipher_data && c->cipher->ctx_size) - OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size); + if (ctx->cipher_data && ctx->cipher->ctx_size) + OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size); } - OPENSSL_free(c->cipher_data); -#ifndef OPENSSL_NO_ENGINE - ENGINE_finish(c->engine); + OPENSSL_free(ctx->cipher_data); +#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) + ENGINE_finish(ctx->engine); #endif - memset(c, 0, sizeof(*c)); + memset(ctx, 0, sizeof(*ctx)); + ctx->iv_len = -1; return 1; } @@ -45,30 +73,46 @@ EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void) void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) { + if (ctx == NULL) + return; EVP_CIPHER_CTX_reset(ctx); OPENSSL_free(ctx); } -int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, - const unsigned char *key, const unsigned char *iv, int enc) +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[]) { - if (cipher != NULL) - EVP_CIPHER_CTX_reset(ctx); - return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc); -} + int n; +#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) + ENGINE *tmpimpl = NULL; +#endif -int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, - ENGINE *impl, const unsigned char *key, - const unsigned char *iv, int enc) -{ - if (enc == -1) + ctx->iv_len = -1; + + /* + * 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 { + } else { if (enc) enc = 1; ctx->encrypt = enc; } -#ifndef OPENSSL_NO_ENGINE + + 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 @@ -78,39 +122,209 @@ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, 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 (cipher) { + + /* + * 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 + || (cipher != NULL && cipher->origin == EVP_ORIG_METH) + || (cipher == NULL && ctx->cipher != NULL + && ctx->cipher->origin == EVP_ORIG_METH)) { + 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) { + if (ctx->cipher->cleanup != NULL && !ctx->cipher->cleanup(ctx)) + return 0; + 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 (!ossl_assert(cipher->prov != NULL)) { + ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); + return 0; + } + + if (cipher != ctx->fetched_cipher) { + 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) { /* - * Ensure a context left lying around from last time is cleared (the - * previous check attempted to avoid this if the same ENGINE and - * EVP_CIPHER could be used). + * If this ctx was already set up for no padding then we need to tell + * the new cipher about it. */ - if (ctx->cipher -#ifndef OPENSSL_NO_ENGINE - || ctx->engine + if (!EVP_CIPHER_CTX_set_padding(ctx, 0)) + return 0; + } + +#ifndef FIPS_MODULE + /* + * Fix for CVE-2023-5363 + * Passing in a size as part of the init call takes effect late + * so, force such to occur before the initialisation. + * + * The FIPS provider's internal library context is used in a manner + * such that this is not an issue. + */ + if (params != NULL) { + OSSL_PARAM param_lens[3] = { OSSL_PARAM_END, OSSL_PARAM_END, + OSSL_PARAM_END }; + OSSL_PARAM *q = param_lens; + const OSSL_PARAM *p; + + p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN); + if (p != NULL) + memcpy(q++, p, sizeof(*q)); + + /* + * Note that OSSL_CIPHER_PARAM_AEAD_IVLEN is a synomym for + * OSSL_CIPHER_PARAM_IVLEN so both are covered here. + */ + p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN); + if (p != NULL) + memcpy(q++, p, sizeof(*q)); + + if (q != param_lens) { + if (!EVP_CIPHER_CTX_set_params(ctx, param_lens)) { + ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_LENGTH); + return 0; + } + } + } #endif - || ctx->cipher_data) { + + 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; } -#ifndef OPENSSL_NO_ENGINE - if (impl) { +#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) + if (impl != NULL) { if (!ENGINE_init(impl)) { - EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); + ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); return 0; } - } else - /* Ask if an ENGINE is reserved for this job */ - impl = ENGINE_get_cipher_engine(cipher->nid); - if (impl) { + } 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) { - ENGINE_finish(impl); - EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); + + 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 */ @@ -120,8 +334,9 @@ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, * from an ENGINE and we need to release it when done. */ ctx->engine = impl; - } else + } else { ctx->engine = NULL; + } #endif ctx->cipher = cipher; @@ -129,7 +344,7 @@ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size); if (ctx->cipher_data == NULL) { ctx->cipher = NULL; - EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE); + ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); return 0; } } else { @@ -139,32 +354,33 @@ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, /* 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)) { + if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL) <= 0) { ctx->cipher = NULL; - EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR); + ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); return 0; } } - } else if (!ctx->cipher) { - EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET); - return 0; } -#ifndef OPENSSL_NO_ENGINE +#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_mode(ctx) == EVP_CIPH_WRAP_MODE) { - EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED); + && 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_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) { - switch (EVP_CIPHER_CTX_mode(ctx)) { + 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: @@ -177,19 +393,27 @@ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, /* fall-through */ case EVP_CIPH_CBC_MODE: - - OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <= - (int)sizeof(ctx->iv)); - if (iv) - memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx)); - memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); + 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) - memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx)); + 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: @@ -197,7 +421,7 @@ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, } } - if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { + if (key != NULL || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) { if (!ctx->cipher->init(ctx, key, iv, enc)) return 0; } @@ -207,6 +431,28 @@ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, 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) { @@ -245,6 +491,13 @@ int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, 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) { @@ -258,6 +511,13 @@ int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, 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 @@ -281,7 +541,7 @@ int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, # define PTRDIFF_T size_t #endif -int is_partially_overlapping(const void *ptr1, const void *ptr2, size_t len) +int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len) { PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2; /* @@ -299,29 +559,17 @@ static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, const unsigned char *in, int inl) { - int i, j, bl; - size_t cmpl = (size_t)inl; + int i, j, bl, cmpl = inl; if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS)) cmpl = (cmpl + 7) / 8; bl = ctx->cipher->block_size; - /* - * CCM mode needs to know about the case where inl == 0 && in == NULL - it - * means the plaintext/ciphertext length is 0 - */ - if (inl < 0 - || (inl == 0 - && EVP_CIPHER_mode(ctx->cipher) != EVP_CIPH_CCM_MODE)) { - *outl = 0; - return inl == 0; - } - 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 && is_partially_overlapping(out, in, cmpl)) { - EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); + if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { + ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); return 0; } @@ -333,8 +581,12 @@ static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, return 1; } - if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) { - EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); + 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; } @@ -366,8 +618,7 @@ static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, * we process from ctx->buf does not exceed INT_MAX */ if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) { - EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, - EVP_R_OUTPUT_WOULD_OVERFLOW); + ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); return 0; } memcpy(&(ctx->buf[i]), in, j); @@ -398,12 +649,55 @@ static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx, 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) { - EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION); + 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); } @@ -418,12 +712,51 @@ 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) { - EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION); + 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); @@ -443,8 +776,7 @@ int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) bl = ctx->buf_len; if (ctx->flags & EVP_CIPH_NO_PADDING) { if (bl) { - EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, - EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); + ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); return 0; } *outl = 0; @@ -465,35 +797,62 @@ int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, const unsigned char *in, int inl) { - int fix_len; + int fix_len, cmpl = inl, ret; unsigned int b; - size_t cmpl = (size_t)inl; + 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) { - EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION); + 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 = (cmpl + 7) / 8; - /* - * CCM mode needs to know about the case where inl == 0 - it means the - * plaintext/ciphertext length is 0 - */ - if (inl < 0 - || (inl == 0 - && EVP_CIPHER_mode(ctx->cipher) != EVP_CIPH_CCM_MODE)) { - *outl = 0; - return inl == 0; - } - if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { - if (b == 1 && is_partially_overlapping(out, in, cmpl)) { - EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); + if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) { + ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); return 0; } @@ -506,6 +865,11 @@ int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, 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); @@ -514,8 +878,8 @@ int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, if (ctx->final_used) { /* see comment about PTRDIFF_T comparison above */ if (((PTRDIFF_T)out == (PTRDIFF_T)in) - || is_partially_overlapping(out, in, b)) { - EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING); + || ossl_is_partially_overlapping(out, in, b)) { + ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING); return 0; } /* @@ -528,7 +892,7 @@ int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl, * This must never exceed INT_MAX */ if ((inl & ~(b - 1)) > INT_MAX - b) { - EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_OUTPUT_WOULD_OVERFLOW); + ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW); return 0; } memcpy(out, ctx->final, b); @@ -568,15 +932,55 @@ 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) { - EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION); + ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION); return 0; } - *outl = 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) @@ -589,8 +993,7 @@ int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) b = ctx->cipher->block_size; if (ctx->flags & EVP_CIPH_NO_PADDING) { if (ctx->buf_len) { - EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, - EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); + ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH); return 0; } *outl = 0; @@ -598,7 +1001,7 @@ int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) } if (b > 1) { if (ctx->buf_len || !ctx->final_used) { - EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH); + ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH); return 0; } OPENSSL_assert(b <= sizeof(ctx->final)); @@ -609,12 +1012,12 @@ int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) */ n = ctx->final[b - 1]; if (n == 0 || n > (int)b) { - EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); + ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); return 0; } for (i = 0; i < n; i++) { if (ctx->final[--b] != n) { - EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT); + ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT); return 0; } } @@ -629,69 +1032,420 @@ int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) 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 = keylen; + + 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); + ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params); + + return ok > 0 ? 1 : 0; + } + + /* 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 (c->key_len == keylen) + 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; } - EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH); + 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; - return 1; + + 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; - - if (!ctx->cipher) { - EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET); + 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->ctrl) { - EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED); + 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); + 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); - if (ret == -1) { - EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, - EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED); + + 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[]) +{ + if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) { + ctx->iv_len = -1; + return ctx->cipher->set_ctx_params(ctx->algctx, params); + } + return 0; +} + +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); - if (RAND_priv_bytes(key, ctx->key_len) <= 0) - return 0; - return 1; + +#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 */ } int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) { if ((in == NULL) || (in->cipher == NULL)) { - EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED); + 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; } -#ifndef OPENSSL_NO_ENGINE + + 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)) { - EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB); + ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB); return 0; } #endif @@ -703,7 +1457,7 @@ int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size); if (out->cipher_data == NULL) { out->cipher = NULL; - EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE); + ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); return 0; } memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size); @@ -712,8 +1466,253 @@ int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY) if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) { out->cipher = NULL; - EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR); + 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); +} |