#include <openssl/params.h>
#include <openssl/core_names.h>
#include <openssl/dh.h>
-#include "internal/evp_int.h"
+#include "crypto/evp.h"
#include "internal/provider.h"
-#include "evp_locl.h"
+#include "evp_local.h"
#if !defined(FIPS_MODE)
int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
{
- int ret;
+ int ret = -1; /* Assume the worst */
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)
+ /*
+ * For legacy implementations, we detect custom AlgorithmIdentifier
+ * parameter handling by checking if the function pointer
+ * cipher->set_asn1_parameters is set. We know that this pointer
+ * is NULL for provided implementations.
+ *
+ * Otherwise, for any implementation, we check the flag
+ * EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
+ * default AI parameter extraction.
+ *
+ * Otherwise, for provided implementations, we convert |type| to
+ * a DER encoded blob and pass to the implementation in OSSL_PARAM
+ * form.
+ *
+ * If none of the above applies, this operation is unsupported.
+ */
+ if (cipher->set_asn1_parameters != NULL) {
ret = cipher->set_asn1_parameters(c, type);
- else if (cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
+ } else if ((EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
switch (EVP_CIPHER_mode(cipher)) {
case EVP_CIPH_WRAP_MODE:
- if (EVP_CIPHER_nid(cipher) == NID_id_smime_alg_CMS3DESwrap)
+ if (EVP_CIPHER_is_a(cipher, SN_id_smime_alg_CMS3DESwrap))
ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
ret = 1;
break;
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);
+ } else if (cipher->prov != NULL) {
+ OSSL_PARAM params[3], *p = params;
+ unsigned char *der = NULL, *derp;
+
+ /*
+ * We make two passes, the first to get the appropriate buffer size,
+ * and the second to get the actual value.
+ */
+ *p++ = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_ALG_ID,
+ NULL, 0);
+ *p = OSSL_PARAM_construct_end();
+
+ if (!EVP_CIPHER_CTX_get_params(c, params))
+ goto err;
+
+ /* ... but, we should get a return size too! */
+ if (params[0].return_size != 0
+ && (der = OPENSSL_malloc(params[0].return_size)) != NULL) {
+ params[0].data = der;
+ params[0].data_size = params[0].return_size;
+ params[0].return_size = 0;
+ derp = der;
+ if (EVP_CIPHER_CTX_get_params(c, params)
+ && d2i_ASN1_TYPE(&type, (const unsigned char **)&derp,
+ params[0].return_size) != NULL) {
+ ret = 1;
+ }
+ OPENSSL_free(der);
+ }
+ } else {
+ ret = -2;
+ }
+
+ err:
+ if (ret == -2)
+ EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, ASN1_R_UNSUPPORTED_CIPHER);
+ else if (ret <= 0)
+ EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, 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;
+ int ret = -1; /* Assume the worst */
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)
+ /*
+ * For legacy implementations, we detect custom AlgorithmIdentifier
+ * parameter handling by checking if there the function pointer
+ * cipher->get_asn1_parameters is set. We know that this pointer
+ * is NULL for provided implementations.
+ *
+ * Otherwise, for any implementation, we check the flag
+ * EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
+ * default AI parameter creation.
+ *
+ * Otherwise, for provided implementations, we get the AI parameter
+ * in DER encoded form from the implementation by requesting the
+ * appropriate OSSL_PARAM and converting the result to a ASN1_TYPE.
+ *
+ * If none of the above applies, this operation is unsupported.
+ */
+ if (cipher->get_asn1_parameters != NULL) {
ret = cipher->get_asn1_parameters(c, type);
- else if (cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
+ } else if ((EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
switch (EVP_CIPHER_mode(cipher)) {
-
case EVP_CIPH_WRAP_MODE:
ret = 1;
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);
+ } else if (cipher->prov != NULL) {
+ OSSL_PARAM params[3], *p = params;
+ unsigned char *der = NULL;
+ int derl = -1;
+
+ if ((derl = i2d_ASN1_TYPE(type, &der)) >= 0) {
+ *p++ =
+ OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_ALG_ID,
+ der, (size_t)derl);
+ *p = OSSL_PARAM_construct_end();
+ if (EVP_CIPHER_CTX_set_params(c, params))
+ ret = 1;
+ OPENSSL_free(der);
+ }
+ } else {
+ ret = -2;
+ }
+
+ if (ret == -2)
+ EVPerr(EVP_F_EVP_CIPHER_ASN1_TO_PARAM, EVP_R_UNSUPPORTED_CIPHER);
+ else if (ret <= 0)
+ EVPerr(EVP_F_EVP_CIPHER_ASN1_TO_PARAM, EVP_R_CIPHER_PARAMETER_ERROR);
if (ret < -1)
ret = -1;
return ret;
{
int i = 0;
unsigned int j;
+ unsigned char *oiv = NULL;
if (type != NULL) {
+ oiv = (unsigned char *)EVP_CIPHER_CTX_original_iv(c);
j = EVP_CIPHER_CTX_iv_length(c);
OPENSSL_assert(j <= sizeof(c->iv));
- i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
+ i = ASN1_TYPE_set_octetstring(type, oiv, j);
}
return i;
}
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 the provided implementation has a ccipher function, we use it,
+ * and translate its return value like this: 0 => -1, 1 => outlen
+ *
+ * Otherwise, we call the cupdate function if in != NULL, or cfinal
+ * if in == NULL. Regardless of which, we return what we got.
+ */
+ int ret = -1;
+ size_t outl = 0;
+ size_t 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;
+ ret = ctx->cipher->ccipher(ctx->provctx, out, &outl,
+ inl + (blocksize == 1 ? 0 : blocksize),
+ in, (size_t)inl)
+ ? (int)outl : -1;
+ else if (in != NULL)
+ ret = ctx->cipher->cupdate(ctx->provctx, out, &outl,
+ inl + (blocksize == 1 ? 0 : blocksize),
+ in, (size_t)inl);
+ else
+ ret = ctx->cipher->cfinal(ctx->provctx, out, &outl,
+ blocksize == 1 ? 0 : blocksize);
+
+ return ret;
}
return ctx->cipher->do_cipher(ctx, out, in, inl);
params[0] = OSSL_PARAM_construct_ulong(OSSL_CIPHER_PARAM_FLAGS, &v);
ok = evp_do_ciph_getparams(cipher, params);
+ /* Provided implementations may have a custom cipher_cipher */
+ if (cipher->prov != NULL && cipher->ccipher != NULL)
+ v |= EVP_CIPH_FLAG_CUSTOM_CIPHER;
+
return ok != 0 ? v : 0;
}
const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx)
{
- return ctx->oiv;
+ int ok;
+ const unsigned char *v = ctx->oiv;
+ OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
+
+ params[0] =
+ OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV,
+ (void **)&v, sizeof(ctx->oiv));
+ ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
+
+ return ok != 0 ? v : NULL;
}
/*
return ctx->cipher->nid;
}
+int EVP_CIPHER_is_a(const EVP_CIPHER *cipher, const char *name)
+{
+#ifndef FIPS_MODE
+ if (cipher->prov == NULL) {
+ int nid = EVP_CIPHER_nid(cipher);
+
+ return nid == OBJ_sn2nid(name) || nid == OBJ_ln2nid(name);
+ }
+#endif
+ return evp_is_a(cipher->prov, cipher->name_id, name);
+}
+
const char *EVP_CIPHER_name(const EVP_CIPHER *cipher)
{
if (cipher->prov != NULL)
return ok != 0 ? (int)v : 0;
}
+int EVP_MD_is_a(const EVP_MD *md, const char *name)
+{
+ return evp_is_a(md->prov, md->name_id, name);
+}
+
const char *EVP_MD_name(const EVP_MD *md)
{
if (md->prov != NULL)
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