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/* $OpenBSD: ssl_sigalgs.c,v 1.6 2018/11/11 02:03:23 beck Exp $ */
/*
* Copyright (c) 2018, Bob Beck <beck@openbsd.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <string.h>
#include <stdlib.h>
#include <openssl/evp.h>
#include "bytestring.h"
#include "ssl_locl.h"
#include "ssl_sigalgs.h"
#include "tls13_internal.h"
const struct ssl_sigalg sigalgs[] = {
{
.value = SIGALG_RSA_PKCS1_SHA512,
.md = EVP_sha512,
.key_type = EVP_PKEY_RSA,
.pkey_idx = SSL_PKEY_RSA_SIGN,
},
{
.value = SIGALG_ECDSA_SECP512R1_SHA512,
.md = EVP_sha512,
.key_type = EVP_PKEY_EC,
.pkey_idx = SSL_PKEY_ECC,
},
#ifndef OPENSSL_NO_GOST
{
.value = SIGALG_GOSTR12_512_STREEBOG_512,
.md = EVP_streebog512,
.key_type = EVP_PKEY_GOSTR12_512,
.pkey_idx = SSL_PKEY_GOST01, /* XXX */
},
#endif
{
.value = SIGALG_RSA_PKCS1_SHA384,
.md = EVP_sha384,
.key_type = EVP_PKEY_RSA,
.pkey_idx = SSL_PKEY_RSA_SIGN,
},
{
.value = SIGALG_ECDSA_SECP384R1_SHA384,
.md = EVP_sha384,
.key_type = EVP_PKEY_EC,
.pkey_idx = SSL_PKEY_ECC,
},
{
.value = SIGALG_RSA_PKCS1_SHA256,
.md = EVP_sha256,
.key_type = EVP_PKEY_RSA,
.pkey_idx = SSL_PKEY_RSA_SIGN,
},
{
.value = SIGALG_ECDSA_SECP256R1_SHA256,
.md = EVP_sha256,
.key_type = EVP_PKEY_EC,
.pkey_idx = SSL_PKEY_ECC,
},
#ifndef OPENSSL_NO_GOST
{
.value = SIGALG_GOSTR12_256_STREEBOG_256,
.md = EVP_streebog256,
.key_type = EVP_PKEY_GOSTR12_256,
.pkey_idx = SSL_PKEY_GOST01, /* XXX */
},
{
.value = SIGALG_GOSTR01_GOST94,
.md = EVP_gostr341194,
.key_type = EVP_PKEY_GOSTR01,
.pkey_idx = SSL_PKEY_GOST01,
},
#endif
{
.value = SIGALG_RSA_PSS_RSAE_SHA256,
.md = EVP_sha256,
.key_type = EVP_PKEY_RSA,
.pkey_idx = SSL_PKEY_RSA_SIGN,
.flags = SIGALG_FLAG_RSA_PSS,
},
{
.value = SIGALG_RSA_PSS_RSAE_SHA384,
.md = EVP_sha384,
.key_type = EVP_PKEY_RSA,
.pkey_idx = SSL_PKEY_RSA_SIGN,
.flags = SIGALG_FLAG_RSA_PSS,
},
{
.value = SIGALG_RSA_PSS_RSAE_SHA512,
.md = EVP_sha512,
.key_type = EVP_PKEY_RSA,
.pkey_idx = SSL_PKEY_RSA_SIGN,
.flags = SIGALG_FLAG_RSA_PSS,
},
{
.value = SIGALG_RSA_PSS_PSS_SHA256,
.md = EVP_sha256,
.key_type = EVP_PKEY_RSA,
.pkey_idx = SSL_PKEY_RSA_SIGN,
.flags = SIGALG_FLAG_RSA_PSS,
},
{
.value = SIGALG_RSA_PSS_PSS_SHA384,
.md = EVP_sha384,
.key_type = EVP_PKEY_RSA,
.pkey_idx = SSL_PKEY_RSA_SIGN,
.flags = SIGALG_FLAG_RSA_PSS,
},
{
.value = SIGALG_RSA_PSS_PSS_SHA512,
.md = EVP_sha512,
.key_type = EVP_PKEY_RSA,
.pkey_idx = SSL_PKEY_RSA_SIGN,
.flags = SIGALG_FLAG_RSA_PSS,
},
{
.value = SIGALG_RSA_PKCS1_SHA224,
.md = EVP_sha224,
.key_type = EVP_PKEY_RSA,
.pkey_idx = SSL_PKEY_RSA_SIGN,
},
{
.value = SIGALG_ECDSA_SECP224R1_SHA224,
.md = EVP_sha224,
.key_type = EVP_PKEY_EC,
.pkey_idx = SSL_PKEY_ECC,
},
{
.value = SIGALG_RSA_PKCS1_SHA1,
.key_type = EVP_PKEY_RSA,
.pkey_idx = SSL_PKEY_RSA_SIGN,
.md = EVP_md5_sha1,
},
{
.value = SIGALG_ECDSA_SHA1,
.key_type = EVP_PKEY_EC,
.md = EVP_sha1,
.pkey_idx = SSL_PKEY_ECC,
},
{
.value = SIGALG_NONE,
},
};
/* Sigalgs for tls 1.2, in preference order, */
uint16_t tls12_sigalgs[] = {
SIGALG_RSA_PKCS1_SHA512,
SIGALG_ECDSA_SECP512R1_SHA512,
SIGALG_GOSTR12_512_STREEBOG_512,
SIGALG_RSA_PKCS1_SHA384,
SIGALG_ECDSA_SECP384R1_SHA384,
SIGALG_RSA_PKCS1_SHA256,
SIGALG_ECDSA_SECP256R1_SHA256,
SIGALG_GOSTR12_256_STREEBOG_256,
SIGALG_GOSTR01_GOST94,
SIGALG_RSA_PKCS1_SHA224,
SIGALG_ECDSA_SECP224R1_SHA224,
SIGALG_RSA_PKCS1_SHA1, /* XXX */
SIGALG_ECDSA_SHA1, /* XXX */
};
size_t tls12_sigalgs_len = (sizeof(tls12_sigalgs) / sizeof(tls12_sigalgs[0]));
const struct ssl_sigalg *
ssl_sigalg_lookup(uint16_t sigalg)
{
int i;
for (i = 0; sigalgs[i].value != SIGALG_NONE; i++) {
if (sigalgs[i].value == sigalg)
return &sigalgs[i];
}
return NULL;
}
const struct ssl_sigalg *
ssl_sigalg(uint16_t sigalg, uint16_t *values, size_t len)
{
const struct ssl_sigalg *sap;
int i;
for (i = 0; i < len; i++) {
if (values[i] == sigalg)
break;
}
if (values[i] == sigalg) {
if ((sap = ssl_sigalg_lookup(sigalg)) != NULL)
return sap;
}
return NULL;
}
int
ssl_sigalgs_build(CBB *cbb, uint16_t *values, size_t len)
{
const struct ssl_sigalg *sap;
size_t i;
for (i = 0; sigalgs[i].value != SIGALG_NONE; i++);
if (len > i)
return 0;
/* XXX check for duplicates and other sanity BS? */
/* Add values in order as long as they are supported. */
for (i = 0; i < len; i++) {
if ((sap = ssl_sigalg_lookup(values[i])) != NULL) {
if (!CBB_add_u16(cbb, values[i]))
return 0;
} else
return 0;
}
return 1;
}
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