providers/common/provider_util.c

   1 /*
   2  * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <openssl/evp.h>
  11 #include <openssl/core_names.h>
  12 #include "internal/provider_util.h"
  13
  14 void ossl_prov_cipher_reset(PROV_CIPHER *pc)
  15 {
  16     EVP_CIPHER_free(pc->alloc_cipher);
  17     pc->alloc_cipher = NULL;
  18     pc->cipher = NULL;
  19     pc->engine = NULL;
  20     pc->name[0] = '\0';
  21 }
  22
  23 int ossl_prov_cipher_copy(PROV_CIPHER *dst, const PROV_CIPHER *src)
  24 {
  25     if (src->alloc_cipher != NULL && !EVP_CIPHER_up_ref(src->alloc_cipher))
  26         return 0;
  27     dst->engine = src->engine;
  28     dst->cipher = src->cipher;
  29     dst->alloc_cipher = src->alloc_cipher;
  30     OPENSSL_strlcpy(dst->name, src->name, sizeof(dst->name));
  31     return 1;
  32 }
  33
  34 static int load_common(const OSSL_PARAM params[], const char **propquery,
  35                        ENGINE **engine)
  36 {
  37     const OSSL_PARAM *p;
  38
  39     *propquery = NULL;
  40     p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_PROPERTIES);
  41     if (p != NULL) {
  42         if (p->data_type != OSSL_PARAM_UTF8_STRING)
  43             return 0;
  44         *propquery = p->data;
  45     }
  46
  47     *engine = NULL;
  48     /* TODO legacy stuff, to be removed */
  49     /* Inside the FIPS module, we don't support legacy ciphers */
  50 #if !defined(FIPS_MODE) && !defined(OPENSSL_NO_ENGINE)
  51     p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_ENGINE);
  52     if (p != NULL) {
  53         if (p->data_type != OSSL_PARAM_UTF8_STRING)
  54             return 0;
  55         ENGINE_finish(*engine);
  56         *engine = ENGINE_by_id(p->data);
  57         if (*engine == NULL)
  58             return 0;
  59     }
  60 #endif
  61     return 1;
  62 }
  63
  64 int ossl_prov_cipher_load_from_params(PROV_CIPHER *pc,
  65                                       const OSSL_PARAM params[],
  66                                       OPENSSL_CTX *ctx)
  67 {
  68     const OSSL_PARAM *p;
  69     const char *propquery;
  70
  71     if (!load_common(params, &propquery, &pc->engine))
  72         return 0;
  73
  74     p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_CIPHER);
  75     if (p == NULL)
  76         return 1;
  77     if (p->data_type != OSSL_PARAM_UTF8_STRING)
  78         return 0;
  79
  80     EVP_CIPHER_free(pc->alloc_cipher);
  81     pc->cipher = pc->alloc_cipher = EVP_CIPHER_fetch(ctx, p->data, propquery);
  82     OPENSSL_strlcpy(pc->name, p->data, sizeof(pc->name));
  83     /* TODO legacy stuff, to be removed */
  84 #ifndef FIPS_MODE /* Inside the FIPS module, we don't support legacy ciphers */
  85     if (pc->cipher == NULL)
  86         pc->cipher = EVP_get_cipherbyname(p->data);
  87 #endif
  88     return pc->cipher != NULL;
  89 }
  90
  91 const EVP_CIPHER *ossl_prov_cipher_cipher(const PROV_CIPHER *pc)
  92 {
  93     return pc->cipher;
  94 }
  95
  96 ENGINE *ossl_prov_cipher_engine(const PROV_CIPHER *pc)
  97 {
  98     return pc->engine;
  99 }
 100
 101 const char *ossl_prov_cipher_name(const PROV_CIPHER *pc)
 102 {
 103     return pc->name;
 104 }
 105
 106 void ossl_prov_digest_reset(PROV_DIGEST *pd)
 107 {
 108     EVP_MD_free(pd->alloc_md);
 109     pd->alloc_md = NULL;
 110     pd->md = NULL;
 111     pd->engine = NULL;
 112     pd->name[0] = '\0';
 113 }
 114
 115 int ossl_prov_digest_copy(PROV_DIGEST *dst, const PROV_DIGEST *src)
 116 {
 117     if (src->alloc_md != NULL && !EVP_MD_up_ref(src->alloc_md))
 118         return 0;
 119     dst->engine = src->engine;
 120     dst->md = src->md;
 121     dst->alloc_md = src->alloc_md;
 122     OPENSSL_strlcpy(dst->name, src->name, sizeof(dst->name));
 123     return 1;
 124 }
 125
 126 int ossl_prov_digest_load_from_params(PROV_DIGEST *pd,
 127                                       const OSSL_PARAM params[],
 128                                       OPENSSL_CTX *ctx)
 129 {
 130     const OSSL_PARAM *p;
 131     const char *propquery;
 132
 133     if (!load_common(params, &propquery, &pd->engine))
 134         return 0;
 135
 136
 137     p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_DIGEST);
 138     if (p == NULL)
 139         return 1;
 140     if (p->data_type != OSSL_PARAM_UTF8_STRING)
 141         return 0;
 142
 143     EVP_MD_free(pd->alloc_md);
 144     pd->md = pd->alloc_md = EVP_MD_fetch(ctx, p->data, propquery);
 145     OPENSSL_strlcpy(pd->name, p->data, sizeof(pd->name));
 146     /* TODO legacy stuff, to be removed */
 147 #ifndef FIPS_MODE /* Inside the FIPS module, we don't support legacy digests */
 148     if (pd->md == NULL)
 149         pd->md = EVP_get_digestbyname(p->data);
 150 #endif
 151     return pd->md != NULL;
 152 }
 153
 154 const EVP_MD *ossl_prov_digest_md(const PROV_DIGEST *pd)
 155 {
 156     return pd->md;
 157 }
 158
 159 ENGINE *ossl_prov_digest_engine(const PROV_DIGEST *pd)
 160 {
 161     return pd->engine;
 162 }
 163
 164 const char *ossl_prov_digest_name(const PROV_DIGEST *pd)
 165 {
 166     return pd->name;
 167 }