X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fevp%2Fevp_lib.c;h=8ed39cb53ea070a7bb544f1368d42bc1551e59a7;hp=a431945ef5c4e7df70b9b0db1720d369d7661e8d;hb=70c35fd1f6467da5563c6cab3ea373e6359cf080;hpb=4b42658082a3d6224d25f10de8fdb605d30015a9 diff --git a/crypto/evp/evp_lib.c b/crypto/evp/evp_lib.c index a431945ef5..8ed39cb53e 100644 --- a/crypto/evp/evp_lib.c +++ b/crypto/evp/evp_lib.c @@ -1,142 +1,702 @@ -/* crypto/evp/evp_lib.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ #include -#include "cryptlib.h" +#include "internal/cryptlib.h" #include #include +#include +#include +#include "internal/evp_int.h" +#include "internal/provider.h" +#include "evp_locl.h" +#if !defined(FIPS_MODE) int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type) - { - int ret; +{ + int ret; + const EVP_CIPHER *cipher = c->cipher; + + if (cipher->prov != NULL) { + /* + * The cipher has come from a provider and won't have the default flags. + * Find the implicit form so we can check the flags. + * TODO(3.0): This won't work for 3rd party ciphers we know nothing about + * We'll need to think of something else for those. + */ + cipher = EVP_get_cipherbynid(cipher->nid); + if (cipher == NULL) { + EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, ASN1_R_UNSUPPORTED_CIPHER); + return -1; + } + } + + if (cipher->set_asn1_parameters != NULL) + ret = cipher->set_asn1_parameters(c, type); + else if (cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) { + switch (EVP_CIPHER_mode(cipher)) { + case EVP_CIPH_WRAP_MODE: + if (EVP_CIPHER_nid(cipher) == NID_id_smime_alg_CMS3DESwrap) + ASN1_TYPE_set(type, V_ASN1_NULL, NULL); + ret = 1; + break; + + case EVP_CIPH_GCM_MODE: + case EVP_CIPH_CCM_MODE: + case EVP_CIPH_XTS_MODE: + case EVP_CIPH_OCB_MODE: + ret = -2; + break; - if (c->cipher->set_asn1_parameters != NULL) - ret=c->cipher->set_asn1_parameters(c,type); - else - ret=1; - return(ret); - } + default: + ret = EVP_CIPHER_set_asn1_iv(c, type); + } + } else + ret = -1; + if (ret <= 0) + EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, ret == -2 ? + ASN1_R_UNSUPPORTED_CIPHER : + EVP_R_CIPHER_PARAMETER_ERROR); + if (ret < -1) + ret = -1; + return ret; +} int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type) - { - int ret; - - if (c->cipher->get_asn1_parameters != NULL) - ret=c->cipher->get_asn1_parameters(c,type); - else - ret=1; - return(ret); - } - -int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) - { - int i=0,l; - - if (type != NULL) - { - l=EVP_CIPHER_CTX_iv_length(c); - i=ASN1_TYPE_get_octetstring(type,c->oiv,l); - if (i != l) - return(-1); - else if (i > 0) - memcpy(c->iv,c->oiv,l); - } - return(i); - } +{ + int ret; + const EVP_CIPHER *cipher = c->cipher; + + if (cipher->prov != NULL) { + /* + * The cipher has come from a provider and won't have the default flags. + * Find the implicit form so we can check the flags. + */ + cipher = EVP_get_cipherbynid(cipher->nid); + if (cipher == NULL) + return -1; + } + + if (cipher->get_asn1_parameters != NULL) + ret = cipher->get_asn1_parameters(c, type); + else if (cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) { + switch (EVP_CIPHER_mode(cipher)) { + + case EVP_CIPH_WRAP_MODE: + ret = 1; + break; + + case EVP_CIPH_GCM_MODE: + case EVP_CIPH_CCM_MODE: + case EVP_CIPH_XTS_MODE: + case EVP_CIPH_OCB_MODE: + ret = -2; + break; + + default: + ret = EVP_CIPHER_get_asn1_iv(c, type); + break; + } + } else + ret = -1; + if (ret <= 0) + EVPerr(EVP_F_EVP_CIPHER_ASN1_TO_PARAM, ret == -2 ? + EVP_R_UNSUPPORTED_CIPHER : + EVP_R_CIPHER_PARAMETER_ERROR); + if (ret < -1) + ret = -1; + return ret; +} + +int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *ctx, ASN1_TYPE *type) +{ + int i = 0; + unsigned int l; + + if (type != NULL) { + unsigned char iv[EVP_MAX_IV_LENGTH]; + + l = EVP_CIPHER_CTX_iv_length(ctx); + if (!ossl_assert(l <= sizeof(iv))) + return -1; + i = ASN1_TYPE_get_octetstring(type, iv, l); + if (i != (int)l) + return -1; + + if (!EVP_CipherInit_ex(ctx, NULL, NULL, NULL, iv, -1)) + return -1; + } + return i; +} int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) - { - int i=0,j; +{ + int i = 0; + unsigned int j; - if (type != NULL) - { - j=EVP_CIPHER_CTX_iv_length(c); - i=ASN1_TYPE_set_octetstring(type,c->oiv,j); - } - return(i); - } + if (type != NULL) { + j = EVP_CIPHER_CTX_iv_length(c); + OPENSSL_assert(j <= sizeof(c->iv)); + i = ASN1_TYPE_set_octetstring(type, c->oiv, j); + } + return i; +} +#endif /* !defined(FIPS_MODE) */ /* Convert the various cipher NIDs and dummies to a proper OID NID */ int EVP_CIPHER_type(const EVP_CIPHER *ctx) { - int nid; - ASN1_OBJECT *otmp; - nid = EVP_CIPHER_nid(ctx); + int nid; + nid = EVP_CIPHER_nid(ctx); + + switch (nid) { + + case NID_rc2_cbc: + case NID_rc2_64_cbc: + case NID_rc2_40_cbc: + + return NID_rc2_cbc; + + case NID_rc4: + case NID_rc4_40: + + return NID_rc4; + + case NID_aes_128_cfb128: + case NID_aes_128_cfb8: + case NID_aes_128_cfb1: + + return NID_aes_128_cfb128; + + case NID_aes_192_cfb128: + case NID_aes_192_cfb8: + case NID_aes_192_cfb1: + + return NID_aes_192_cfb128; + + case NID_aes_256_cfb128: + case NID_aes_256_cfb8: + case NID_aes_256_cfb1: + + return NID_aes_256_cfb128; + + case NID_des_cfb64: + case NID_des_cfb8: + case NID_des_cfb1: + + return NID_des_cfb64; + + case NID_des_ede3_cfb64: + case NID_des_ede3_cfb8: + case NID_des_ede3_cfb1: + + return NID_des_cfb64; + + default: +#ifdef FIPS_MODE + return NID_undef; +#else + { + /* Check it has an OID and it is valid */ + ASN1_OBJECT *otmp = OBJ_nid2obj(nid); + + if (OBJ_get0_data(otmp) == NULL) + nid = NID_undef; + ASN1_OBJECT_free(otmp); + return nid; + } +#endif + } +} + +int EVP_CIPHER_block_size(const EVP_CIPHER *cipher) +{ + if (cipher->prov != NULL) { + if (cipher->blocksize != NULL) + return cipher->blocksize(); + /* We default to a block size of 1 */ + return 1; + } + return cipher->block_size; +} + +int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx) +{ + return EVP_CIPHER_block_size(ctx->cipher); +} + +int EVP_CIPHER_impl_ctx_size(const EVP_CIPHER *e) +{ + return e->ctx_size; +} + +int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, unsigned int inl) +{ + if (ctx->cipher->prov != NULL) { + size_t outl = 0; /* ignored */ + int blocksize = EVP_CIPHER_CTX_block_size(ctx); + + if (ctx->cipher->ccipher != NULL) + return + ctx->cipher->ccipher(ctx->provctx, out, &outl, + inl + (blocksize == 1 ? 0 : blocksize), + in, (size_t)inl); + return 0; + } + + return ctx->cipher->do_cipher(ctx, out, in, inl); +} + +const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx) +{ + return ctx->cipher; +} + +int EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx) +{ + return ctx->encrypt; +} + +unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher) +{ + return cipher->flags; +} + +void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx) +{ + return ctx->app_data; +} + +void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data) +{ + ctx->app_data = data; +} + +void *EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX *ctx) +{ + return ctx->cipher_data; +} + +void *EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX *ctx, void *cipher_data) +{ + void *old_cipher_data; + + old_cipher_data = ctx->cipher_data; + ctx->cipher_data = cipher_data; + + return old_cipher_data; +} + +int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher) +{ + if (cipher->prov != NULL) { + if (cipher->iv_length != NULL) + return (int)cipher->iv_length(); + return 0; + } + + return cipher->iv_len; +} + +int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx) +{ + return EVP_CIPHER_iv_length(ctx->cipher); +} + +const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx) +{ + return ctx->oiv; +} + +const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx) +{ + return ctx->iv; +} + +unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx) +{ + return ctx->iv; +} + +unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx) +{ + return ctx->buf; +} + +int EVP_CIPHER_CTX_num(const EVP_CIPHER_CTX *ctx) +{ + return ctx->num; +} + +void EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num) +{ + ctx->num = num; +} + +int EVP_CIPHER_key_length(const EVP_CIPHER *cipher) +{ + if (cipher->prov != NULL) { + if (cipher->key_length != NULL) + return (int)cipher->key_length(); + return -1; + } + + return cipher->key_len; +} + +int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx) +{ + /* + * TODO(3.0): This may need to change if/when we introduce variable length + * key ciphers into the providers. + */ + if (ctx->cipher != NULL && ctx->cipher->prov != NULL) + return EVP_CIPHER_key_length(ctx->cipher); + return ctx->key_len; +} + +int EVP_CIPHER_nid(const EVP_CIPHER *cipher) +{ + return cipher->nid; +} + +int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx) +{ + return ctx->cipher->nid; +} + +int EVP_CIPHER_mode(const EVP_CIPHER *cipher) +{ + if (cipher->prov != NULL) { + int mode; + + /* Cipher comes from a provider - so ask the provider for the mode */ + OSSL_PARAM params[] = { + OSSL_PARAM_int(OSSL_CIPHER_PARAM_MODE, NULL), + OSSL_PARAM_END + }; + + params[0].data = &mode; + + if (cipher->get_params == NULL) { + EVPerr(EVP_F_EVP_CIPHER_MODE, EVP_R_CTRL_NOT_IMPLEMENTED); + return 0; + } + + if (!cipher->get_params(params)) + return 0; + + return mode; + } + return EVP_CIPHER_flags(cipher) & EVP_CIPH_MODE; +} + + +int EVP_MD_block_size(const EVP_MD *md) +{ + if (md == NULL) { + EVPerr(EVP_F_EVP_MD_BLOCK_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL); + return -1; + } + + if (md->prov != NULL && md->dblock_size != NULL) + return (int)md->dblock_size(); + + return md->block_size; +} + +int EVP_MD_type(const EVP_MD *md) +{ + return md->type; +} + +int EVP_MD_pkey_type(const EVP_MD *md) +{ + return md->pkey_type; +} + +int EVP_MD_size(const EVP_MD *md) +{ + if (!md) { + EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL); + return -1; + } + + if (md->prov != NULL && md->size != NULL) + return (int)md->size(); + + return md->md_size; +} + +unsigned long EVP_MD_flags(const EVP_MD *md) +{ + return md->flags; +} + +EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type) +{ + EVP_MD *md = OPENSSL_zalloc(sizeof(*md)); + + if (md != NULL) { + md->type = md_type; + md->pkey_type = pkey_type; + md->lock = CRYPTO_THREAD_lock_new(); + if (md->lock == NULL) { + OPENSSL_free(md); + return NULL; + } + md->refcnt = 1; + } + return md; +} + +EVP_MD *EVP_MD_meth_dup(const EVP_MD *md) +{ + EVP_MD *to = EVP_MD_meth_new(md->type, md->pkey_type); + + if (to != NULL) { + CRYPTO_RWLOCK *lock = to->lock; + memcpy(to, md, sizeof(*to)); + to->lock = lock; + } + return to; +} + +int EVP_MD_up_ref(EVP_MD *md) +{ + int ref = 0; + + CRYPTO_UP_REF(&md->refcnt, &ref, md->lock); + return 1; +} + +void EVP_MD_meth_free(EVP_MD *md) +{ + if (md != NULL) { + int i; + + CRYPTO_DOWN_REF(&md->refcnt, &i, md->lock); + if (i > 0) + return; + ossl_provider_free(md->prov); + CRYPTO_THREAD_lock_free(md->lock); + OPENSSL_free(md); + } +} +int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize) +{ + md->block_size = blocksize; + return 1; +} +int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize) +{ + md->md_size = resultsize; + return 1; +} +int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize) +{ + md->ctx_size = datasize; + return 1; +} +int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags) +{ + md->flags = flags; + return 1; +} +int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx)) +{ + md->init = init; + return 1; +} +int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx, + const void *data, + size_t count)) +{ + md->update = update; + return 1; +} +int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx, + unsigned char *md)) +{ + md->final = final; + return 1; +} +int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to, + const EVP_MD_CTX *from)) +{ + md->copy = copy; + return 1; +} +int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx)) +{ + md->cleanup = cleanup; + return 1; +} +int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd, + int p1, void *p2)) +{ + md->md_ctrl = ctrl; + return 1; +} + +int EVP_MD_meth_get_input_blocksize(const EVP_MD *md) +{ + return md->block_size; +} +int EVP_MD_meth_get_result_size(const EVP_MD *md) +{ + return md->md_size; +} +int EVP_MD_meth_get_app_datasize(const EVP_MD *md) +{ + return md->ctx_size; +} +unsigned long EVP_MD_meth_get_flags(const EVP_MD *md) +{ + return md->flags; +} +int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx) +{ + return md->init; +} +int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx, + const void *data, + size_t count) +{ + return md->update; +} +int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx, + unsigned char *md) +{ + return md->final; +} +int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to, + const EVP_MD_CTX *from) +{ + return md->copy; +} +int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx) +{ + return md->cleanup; +} +int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd, + int p1, void *p2) +{ + return md->md_ctrl; +} - switch(nid) { +const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) +{ + if (ctx == NULL) + return NULL; + return ctx->reqdigest; +} - case NID_rc2_cbc: - case NID_rc2_64_cbc: - case NID_rc2_40_cbc: +EVP_PKEY_CTX *EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx) +{ + return ctx->pctx; +} - return NID_rc2_cbc; +#if !defined(FIPS_MODE) +/* TODO(3.0): EVP_DigestSign* not yet supported in FIPS module */ +void EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pctx) +{ + /* + * it's reasonable to set NULL pctx (a.k.a clear the ctx->pctx), so + * we have to deal with the cleanup job here. + */ + if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX)) + EVP_PKEY_CTX_free(ctx->pctx); - case NID_rc4: - case NID_rc4_40: + ctx->pctx = pctx; - return NID_rc4; + if (pctx != NULL) { + /* make sure pctx is not freed when destroying EVP_MD_CTX */ + EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX); + } else { + EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX); + } +} +#endif /* !defined(FIPS_MODE) */ - default: - /* Check it has an OID and it is valid */ - otmp = OBJ_nid2obj(nid); - if(!otmp || !otmp->data) nid = NID_undef; - ASN1_OBJECT_free(otmp); - return nid; - } +void *EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx) +{ + return ctx->md_data; } +int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx, + const void *data, size_t count) +{ + return ctx->update; +} + +void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx, + int (*update) (EVP_MD_CTX *ctx, + const void *data, size_t count)) +{ + ctx->update = update; +} + +void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags) +{ + ctx->flags |= flags; +} + +void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags) +{ + ctx->flags &= ~flags; +} + +int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags) +{ + return (ctx->flags & flags); +} + +void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags) +{ + ctx->flags |= flags; +} + +void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags) +{ + ctx->flags &= ~flags; +} + +int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags) +{ + return (ctx->flags & flags); +} + +int EVP_str2ctrl(int (*cb)(void *ctx, int cmd, void *buf, size_t buflen), + void *ctx, int cmd, const char *value) +{ + size_t len; + + len = strlen(value); + if (len > INT_MAX) + return -1; + return cb(ctx, cmd, (void *)value, len); +} + +int EVP_hex2ctrl(int (*cb)(void *ctx, int cmd, void *buf, size_t buflen), + void *ctx, int cmd, const char *hex) +{ + unsigned char *bin; + long binlen; + int rv = -1; + + bin = OPENSSL_hexstr2buf(hex, &binlen); + if (bin == NULL) + return 0; + if (binlen <= INT_MAX) + rv = cb(ctx, cmd, bin, binlen); + OPENSSL_free(bin); + return rv; +}