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openssl/apps/pkeyutl.c
Tomas Mraz 47a80fd203 pkeyutl.c: Avoid freeing pkey at multiple places 
Also fixes a leak of pkey in error case for -verifyrecover.

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Paul Dale <ppzgs1@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/25987)
2024-11-20 17:40:26 +01:00

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/*
* Copyright 2006-2024 The OpenSSL Project Authors. All Rights Reserved.
*
* 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 "apps.h"
#include "progs.h"
#include <string.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/evp.h>
#include <sys/stat.h>
#define KEY_NONE 0
#define KEY_PRIVKEY 1
#define KEY_PUBKEY 2
#define KEY_CERT 3
static EVP_PKEY *get_pkey(const char *kdfalg,
const char *keyfile, int keyform, int key_type,
char *passinarg, int pkey_op, ENGINE *e);
static EVP_PKEY_CTX *init_ctx(const char *kdfalg, int *pkeysize,
int pkey_op, ENGINE *e,
const int engine_impl, int rawin,
EVP_PKEY *pkey /* ownership is passed to ctx */,
EVP_MD_CTX *mctx, const char *digestname,
const char *kemop, OSSL_LIB_CTX *libctx, const char *propq);
static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file,
ENGINE *e);
static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
unsigned char *out, size_t *poutlen,
const unsigned char *in, size_t inlen,
unsigned char *secret, size_t *psecretlen);
static int do_raw_keyop(int pkey_op, EVP_MD_CTX *mctx,
EVP_PKEY *pkey, BIO *in,
int filesize, unsigned char *sig, int siglen,
unsigned char **out, size_t *poutlen);
static int is_EdDSA(const EVP_PKEY *pkey)
{
if (pkey == NULL)
return 0;
return EVP_PKEY_is_a(pkey, "ED25519")
|| EVP_PKEY_is_a(pkey, "ED448");
}
static int only_rawin(const EVP_PKEY *pkey)
{
return is_EdDSA(pkey);
}
typedef enum OPTION_choice {
OPT_COMMON,
OPT_ENGINE, OPT_ENGINE_IMPL, OPT_IN, OPT_OUT,
OPT_PUBIN, OPT_CERTIN, OPT_ASN1PARSE, OPT_HEXDUMP, OPT_SIGN,
OPT_VERIFY, OPT_VERIFYRECOVER, OPT_REV, OPT_ENCRYPT, OPT_DECRYPT,
OPT_DERIVE, OPT_SIGFILE, OPT_INKEY, OPT_PEERKEY, OPT_PASSIN,
OPT_PEERFORM, OPT_KEYFORM, OPT_PKEYOPT, OPT_PKEYOPT_PASSIN, OPT_KDF,
OPT_KDFLEN, OPT_R_ENUM, OPT_PROV_ENUM,
OPT_DECAP, OPT_ENCAP, OPT_SECOUT, OPT_KEMOP,
OPT_CONFIG,
OPT_RAWIN, OPT_DIGEST
} OPTION_CHOICE;
const OPTIONS pkeyutl_options[] = {
OPT_SECTION("General"),
{"help", OPT_HELP, '-', "Display this summary"},
#ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
{"engine_impl", OPT_ENGINE_IMPL, '-',
"Also use engine given by -engine for crypto operations"},
#endif
{"sign", OPT_SIGN, '-', "Sign input data with private key"},
{"verify", OPT_VERIFY, '-', "Verify with public key"},
{"encrypt", OPT_ENCRYPT, '-', "Encrypt input data with public key"},
{"decrypt", OPT_DECRYPT, '-', "Decrypt input data with private key"},
{"derive", OPT_DERIVE, '-', "Derive shared secret"},
{"decap", OPT_DECAP, '-', "Decapsulate shared secret"},
{"encap", OPT_ENCAP, '-', "Encapsulate shared secret"},
OPT_CONFIG_OPTION,
OPT_SECTION("Input"),
{"in", OPT_IN, '<', "Input file - default stdin"},
{"inkey", OPT_INKEY, 's', "Input key, by default private key"},
{"pubin", OPT_PUBIN, '-', "Input key is a public key"},
{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
{"peerkey", OPT_PEERKEY, 's', "Peer key file used in key derivation"},
{"peerform", OPT_PEERFORM, 'E', "Peer key format (DER/PEM/P12/ENGINE)"},
{"certin", OPT_CERTIN, '-', "Input is a cert with a public key"},
{"rev", OPT_REV, '-', "Reverse the order of the input buffer"},
{"sigfile", OPT_SIGFILE, '<', "Signature file (verify operation only)"},
{"keyform", OPT_KEYFORM, 'E', "Private key format (ENGINE, other values ignored)"},
OPT_SECTION("Output"),
{"out", OPT_OUT, '>', "Output file - default stdout"},
{"secret", OPT_SECOUT, '>', "File to store secret on encapsulation"},
{"asn1parse", OPT_ASN1PARSE, '-',
"parse the output as ASN.1 data to check its DER encoding and print errors"},
{"hexdump", OPT_HEXDUMP, '-', "Hex dump output"},
{"verifyrecover", OPT_VERIFYRECOVER, '-',
"Verify RSA signature, recovering original signature input data"},
OPT_SECTION("Signing/Derivation/Encapsulation"),
{"rawin", OPT_RAWIN, '-',
"Indicate that the signature/verification input data is not yet hashed"},
{"digest", OPT_DIGEST, 's',
"The digest algorithm to use for signing/verifying raw input data. Implies -rawin"},
{"pkeyopt", OPT_PKEYOPT, 's', "Public key options as opt:value"},
{"pkeyopt_passin", OPT_PKEYOPT_PASSIN, 's',
"Public key option that is read as a passphrase argument opt:passphrase"},
{"kdf", OPT_KDF, 's', "Use KDF algorithm"},
{"kdflen", OPT_KDFLEN, 'p', "KDF algorithm output length"},
{"kemop", OPT_KEMOP, 's', "KEM operation specific to the key algorithm"},
OPT_R_OPTIONS,
OPT_PROV_OPTIONS,
{NULL}
};
int pkeyutl_main(int argc, char **argv)
{
CONF *conf = NULL;
BIO *in = NULL, *out = NULL, *secout = NULL;
ENGINE *e = NULL;
EVP_PKEY_CTX *ctx = NULL;
EVP_PKEY *pkey = NULL;
char *infile = NULL, *outfile = NULL, *secoutfile = NULL, *sigfile = NULL, *passinarg = NULL;
char hexdump = 0, asn1parse = 0, rev = 0, *prog;
unsigned char *buf_in = NULL, *buf_out = NULL, *sig = NULL, *secret = NULL;
OPTION_CHOICE o;
int buf_inlen = 0, siglen = -1;
int keyform = FORMAT_UNDEF, peerform = FORMAT_UNDEF;
int keysize = -1, pkey_op = EVP_PKEY_OP_SIGN, key_type = KEY_PRIVKEY;
int engine_impl = 0;
int ret = 1, rv = -1;
size_t buf_outlen = 0, secretlen = 0;
const char *inkey = NULL;
const char *peerkey = NULL;
const char *kdfalg = NULL, *digestname = NULL, *kemop = NULL;
int kdflen = 0;
STACK_OF(OPENSSL_STRING) *pkeyopts = NULL;
STACK_OF(OPENSSL_STRING) *pkeyopts_passin = NULL;
int rawin = 0;
EVP_MD_CTX *mctx = NULL;
EVP_MD *md = NULL;
int filesize = -1;
OSSL_LIB_CTX *libctx = app_get0_libctx();
prog = opt_init(argc, argv, pkeyutl_options);
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
case OPT_EOF:
case OPT_ERR:
opthelp:
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
goto end;
case OPT_HELP:
opt_help(pkeyutl_options);
ret = 0;
goto end;
case OPT_IN:
infile = opt_arg();
break;
case OPT_OUT:
outfile = opt_arg();
break;
case OPT_SECOUT:
secoutfile = opt_arg();
break;
case OPT_SIGFILE:
sigfile = opt_arg();
break;
case OPT_ENGINE_IMPL:
engine_impl = 1;
break;
case OPT_INKEY:
inkey = opt_arg();
break;
case OPT_PEERKEY:
peerkey = opt_arg();
break;
case OPT_PASSIN:
passinarg = opt_arg();
break;
case OPT_PEERFORM:
if (!opt_format(opt_arg(), OPT_FMT_ANY, &peerform))
goto opthelp;
break;
case OPT_KEYFORM:
if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform))
goto opthelp;
break;
case OPT_R_CASES:
if (!opt_rand(o))
goto end;
break;
case OPT_CONFIG:
conf = app_load_config_modules(opt_arg());
if (conf == NULL)
goto end;
break;
case OPT_PROV_CASES:
if (!opt_provider(o))
goto end;
break;
case OPT_ENGINE:
e = setup_engine(opt_arg(), 0);
break;
case OPT_PUBIN:
key_type = KEY_PUBKEY;
break;
case OPT_CERTIN:
key_type = KEY_CERT;
break;
case OPT_ASN1PARSE:
asn1parse = 1;
break;
case OPT_HEXDUMP:
hexdump = 1;
break;
case OPT_SIGN:
pkey_op = EVP_PKEY_OP_SIGN;
break;
case OPT_VERIFY:
pkey_op = EVP_PKEY_OP_VERIFY;
break;
case OPT_VERIFYRECOVER:
pkey_op = EVP_PKEY_OP_VERIFYRECOVER;
break;
case OPT_ENCRYPT:
pkey_op = EVP_PKEY_OP_ENCRYPT;
break;
case OPT_DECRYPT:
pkey_op = EVP_PKEY_OP_DECRYPT;
break;
case OPT_DERIVE:
pkey_op = EVP_PKEY_OP_DERIVE;
break;
case OPT_DECAP:
pkey_op = EVP_PKEY_OP_DECAPSULATE;
break;
case OPT_ENCAP:
pkey_op = EVP_PKEY_OP_ENCAPSULATE;
break;
case OPT_KEMOP:
kemop = opt_arg();
break;
case OPT_KDF:
pkey_op = EVP_PKEY_OP_DERIVE;
key_type = KEY_NONE;
kdfalg = opt_arg();
break;
case OPT_KDFLEN:
kdflen = atoi(opt_arg());
break;
case OPT_REV:
rev = 1;
break;
case OPT_PKEYOPT:
if ((pkeyopts == NULL &&
(pkeyopts = sk_OPENSSL_STRING_new_null()) == NULL) ||
sk_OPENSSL_STRING_push(pkeyopts, opt_arg()) == 0) {
BIO_puts(bio_err, "out of memory\n");
goto end;
}
break;
case OPT_PKEYOPT_PASSIN:
if ((pkeyopts_passin == NULL &&
(pkeyopts_passin = sk_OPENSSL_STRING_new_null()) == NULL) ||
sk_OPENSSL_STRING_push(pkeyopts_passin, opt_arg()) == 0) {
BIO_puts(bio_err, "out of memory\n");
goto end;
}
break;
case OPT_RAWIN:
rawin = 1;
break;
case OPT_DIGEST:
digestname = opt_arg();
break;
}
}
/* No extra arguments. */
if (!opt_check_rest_arg(NULL))
goto opthelp;
if (!app_RAND_load())
goto end;
if (digestname != NULL)
rawin = 1;
if (kdfalg != NULL) {
if (kdflen == 0) {
BIO_printf(bio_err,
"%s: no KDF length given (-kdflen parameter).\n", prog);
goto opthelp;
}
} else if (inkey == NULL) {
BIO_printf(bio_err,
"%s: no private key given (-inkey parameter).\n", prog);
goto opthelp;
} else if (peerkey != NULL && pkey_op != EVP_PKEY_OP_DERIVE) {
BIO_printf(bio_err,
"%s: no peer key given (-peerkey parameter).\n", prog);
goto opthelp;
}
pkey = get_pkey(kdfalg, inkey, keyform, key_type, passinarg, pkey_op, e);
if (pkey_op == EVP_PKEY_OP_VERIFYRECOVER && !EVP_PKEY_is_a(pkey, "RSA")) {
BIO_printf(bio_err, "%s: -verifyrecover can be used only with RSA\n", prog);
goto end;
}
if (pkey_op == EVP_PKEY_OP_SIGN || pkey_op == EVP_PKEY_OP_VERIFY) {
if (only_rawin(pkey)) {
if (is_EdDSA(pkey) && digestname != NULL) {
BIO_printf(bio_err,
"%s: -digest (prehash) is not supported with EdDSA\n", prog);
goto end;
}
rawin = 1; /* implied for Ed25519(ph) and Ed448(ph) and maybe others in the future */
}
} else if (digestname != NULL || rawin) {
BIO_printf(bio_err,
"%s: -digest and -rawin can only be used with -sign or -verify\n", prog);
goto opthelp;
}
if (rawin && rev) {
BIO_printf(bio_err, "%s: -rev cannot be used with raw input\n", prog);
goto opthelp;
}
if (rawin) {
if ((mctx = EVP_MD_CTX_new()) == NULL) {
BIO_printf(bio_err, "Error: out of memory\n");
goto end;
}
}
ctx = init_ctx(kdfalg, &keysize, pkey_op, e, engine_impl, rawin, pkey,
mctx, digestname, kemop, libctx, app_get0_propq());
if (ctx == NULL) {
BIO_printf(bio_err, "%s: Error initializing context\n", prog);
goto end;
}
if (peerkey != NULL && !setup_peer(ctx, peerform, peerkey, e)) {
BIO_printf(bio_err, "%s: Error setting up peer key\n", prog);
goto end;
}
if (pkeyopts != NULL) {
int num = sk_OPENSSL_STRING_num(pkeyopts);
int i;
for (i = 0; i < num; ++i) {
const char *opt = sk_OPENSSL_STRING_value(pkeyopts, i);
if (pkey_ctrl_string(ctx, opt) <= 0) {
BIO_printf(bio_err, "%s: Can't set parameter \"%s\":\n",
prog, opt);
goto end;
}
}
}
if (pkeyopts_passin != NULL) {
int num = sk_OPENSSL_STRING_num(pkeyopts_passin);
int i;
for (i = 0; i < num; i++) {
char *opt = sk_OPENSSL_STRING_value(pkeyopts_passin, i);
char *passin = strchr(opt, ':');
char *passwd;
if (passin == NULL) {
/* Get password interactively */
char passwd_buf[4096];
int r;
BIO_snprintf(passwd_buf, sizeof(passwd_buf), "Enter %s: ", opt);
r = EVP_read_pw_string(passwd_buf, sizeof(passwd_buf) - 1,
passwd_buf, 0);
if (r < 0) {
if (r == -2)
BIO_puts(bio_err, "user abort\n");
else
BIO_puts(bio_err, "entry failed\n");
goto end;
}
passwd = OPENSSL_strdup(passwd_buf);
if (passwd == NULL) {
BIO_puts(bio_err, "out of memory\n");
goto end;
}
} else {
/*
* Get password as a passin argument: First split option name
* and passphrase argument into two strings
*/
*passin = 0;
passin++;
if (app_passwd(passin, NULL, &passwd, NULL) == 0) {
BIO_printf(bio_err, "failed to get '%s'\n", opt);
goto end;
}
}
if (EVP_PKEY_CTX_ctrl_str(ctx, opt, passwd) <= 0) {
BIO_printf(bio_err, "%s: Can't set parameter \"%s\":\n",
prog, opt);
goto end;
}
OPENSSL_free(passwd);
}
}
if (sigfile != NULL && (pkey_op != EVP_PKEY_OP_VERIFY)) {
BIO_printf(bio_err,
"%s: Signature file specified for non verify\n", prog);
goto end;
}
if (sigfile == NULL && (pkey_op == EVP_PKEY_OP_VERIFY)) {
BIO_printf(bio_err,
"%s: No signature file specified for verify\n", prog);
goto end;
}
if (pkey_op != EVP_PKEY_OP_DERIVE && pkey_op != EVP_PKEY_OP_ENCAPSULATE) {
in = bio_open_default(infile, 'r', FORMAT_BINARY);
if (infile != NULL) {
struct stat st;
if (stat(infile, &st) == 0 && st.st_size <= INT_MAX)
filesize = (int)st.st_size;
}
if (in == NULL)
goto end;
}
out = bio_open_default(outfile, 'w', FORMAT_BINARY);
if (out == NULL)
goto end;
if (pkey_op == EVP_PKEY_OP_ENCAPSULATE) {
if (secoutfile == NULL) {
BIO_printf(bio_err, "Encapsulation requires '-secret' argument\n");
goto end;
}
secout = bio_open_default(secoutfile, 'w', FORMAT_BINARY);
if (secout == NULL)
goto end;
}
if (sigfile != NULL) {
BIO *sigbio = BIO_new_file(sigfile, "rb");
if (sigbio == NULL) {
BIO_printf(bio_err, "Can't open signature file %s\n", sigfile);
goto end;
}
siglen = bio_to_mem(&sig, keysize * 10, sigbio);
BIO_free(sigbio);
if (siglen < 0) {
BIO_printf(bio_err, "Error reading signature data\n");
goto end;
}
}
/* Raw input data is handled elsewhere */
if (in != NULL && !rawin) {
/* Read the input data */
buf_inlen = bio_to_mem(&buf_in, -1, in);
if (buf_inlen < 0) {
BIO_printf(bio_err, "Error reading input Data\n");
goto end;
}
if (rev) {
size_t i;
unsigned char ctmp;
size_t l = (size_t)buf_inlen;
for (i = 0; i < l / 2; i++) {
ctmp = buf_in[i];
buf_in[i] = buf_in[l - 1 - i];
buf_in[l - 1 - i] = ctmp;
}
}
}
/* Sanity check the input if the input is not raw */
if (!rawin
&& (pkey_op == EVP_PKEY_OP_SIGN || pkey_op == EVP_PKEY_OP_VERIFY)) {
if (buf_inlen > EVP_MAX_MD_SIZE) {
BIO_printf(bio_err,
"Error: The non-raw input data length %d is too long - max supported hashed size is %d\n",
buf_inlen, EVP_MAX_MD_SIZE);
goto end;
}
}
if (pkey_op == EVP_PKEY_OP_VERIFY) {
if (rawin) {
rv = do_raw_keyop(pkey_op, mctx, pkey, in, filesize, sig, siglen,
NULL, 0);
} else {
rv = EVP_PKEY_verify(ctx, sig, (size_t)siglen,
buf_in, (size_t)buf_inlen);
}
if (rv == 1) {
BIO_puts(out, "Signature Verified Successfully\n");
ret = 0;
} else {
BIO_puts(out, "Signature Verification Failure\n");
}
goto end;
}
if (rawin) {
/* rawin allocates the buffer in do_raw_keyop() */
rv = do_raw_keyop(pkey_op, mctx, pkey, in, filesize, NULL, 0,
&buf_out, (size_t *)&buf_outlen);
} else {
if (kdflen != 0) {
buf_outlen = kdflen;
rv = 1;
} else {
rv = do_keyop(ctx, pkey_op, NULL, (size_t *)&buf_outlen,
buf_in, (size_t)buf_inlen, NULL, (size_t *)&secretlen);
}
if (rv > 0 && buf_outlen != 0) {
buf_out = app_malloc(buf_outlen, "buffer output");
if (secretlen > 0)
secret = app_malloc(secretlen, "secret output");
rv = do_keyop(ctx, pkey_op,
buf_out, (size_t *)&buf_outlen,
buf_in, (size_t)buf_inlen, secret, (size_t *)&secretlen);
}
}
if (rv <= 0) {
if (pkey_op != EVP_PKEY_OP_DERIVE) {
BIO_puts(bio_err, "Public Key operation error\n");
} else {
BIO_puts(bio_err, "Key derivation failed\n");
}
goto end;
}
ret = 0;
if (asn1parse) {
if (!ASN1_parse_dump(out, buf_out, buf_outlen, 1, -1))
ERR_print_errors(bio_err); /* but still return success */
} else if (hexdump) {
BIO_dump(out, (char *)buf_out, buf_outlen);
} else {
BIO_write(out, buf_out, buf_outlen);
}
if (secretlen > 0)
BIO_write(secout, secret, secretlen);
end:
if (ret != 0)
ERR_print_errors(bio_err);
EVP_MD_CTX_free(mctx);
EVP_PKEY_CTX_free(ctx);
EVP_PKEY_free(pkey);
EVP_MD_free(md);
release_engine(e);
BIO_free(in);
BIO_free_all(out);
BIO_free_all(secout);
OPENSSL_free(buf_in);
OPENSSL_free(buf_out);
OPENSSL_free(sig);
OPENSSL_free(secret);
sk_OPENSSL_STRING_free(pkeyopts);
sk_OPENSSL_STRING_free(pkeyopts_passin);
NCONF_free(conf);
return ret;
}
static EVP_PKEY *get_pkey(const char *kdfalg,
const char *keyfile, int keyform, int key_type,
char *passinarg, int pkey_op, ENGINE *e)
{
EVP_PKEY *pkey = NULL;
char *passin = NULL;
X509 *x;
if (((pkey_op == EVP_PKEY_OP_SIGN) || (pkey_op == EVP_PKEY_OP_DECRYPT)
|| (pkey_op == EVP_PKEY_OP_DERIVE))
&& (key_type != KEY_PRIVKEY && kdfalg == NULL)) {
BIO_printf(bio_err, "A private key is needed for this operation\n");
return NULL;
}
if (!app_passwd(passinarg, NULL, &passin, NULL)) {
BIO_printf(bio_err, "Error getting password\n");
return NULL;
}
switch (key_type) {
case KEY_PRIVKEY:
pkey = load_key(keyfile, keyform, 0, passin, e, "private key");
break;
case KEY_PUBKEY:
pkey = load_pubkey(keyfile, keyform, 0, NULL, e, "public key");
break;
case KEY_CERT:
x = load_cert(keyfile, keyform, "Certificate");
if (x) {
pkey = X509_get_pubkey(x);
X509_free(x);
}
break;
case KEY_NONE:
break;
}
OPENSSL_free(passin);
return pkey;
}
static EVP_PKEY_CTX *init_ctx(const char *kdfalg, int *pkeysize,
int pkey_op, ENGINE *e,
const int engine_impl, int rawin,
EVP_PKEY *pkey /* ownership is passed to ctx */,
EVP_MD_CTX *mctx, const char *digestname,
const char *kemop, OSSL_LIB_CTX *libctx, const char *propq)
{
EVP_PKEY_CTX *ctx = NULL;
ENGINE *impl = NULL;
int rv = -1;
#ifndef OPENSSL_NO_ENGINE
if (engine_impl)
impl = e;
#endif
if (kdfalg != NULL) {
int kdfnid = OBJ_sn2nid(kdfalg);
if (kdfnid == NID_undef) {
kdfnid = OBJ_ln2nid(kdfalg);
if (kdfnid == NID_undef) {
BIO_printf(bio_err, "The given KDF \"%s\" is unknown.\n",
kdfalg);
return NULL;
}
}
if (impl != NULL)
ctx = EVP_PKEY_CTX_new_id(kdfnid, impl);
else
ctx = EVP_PKEY_CTX_new_from_name(libctx, kdfalg, propq);
} else {
if (pkey == NULL)
return NULL;
*pkeysize = EVP_PKEY_get_size(pkey);
if (impl != NULL)
ctx = EVP_PKEY_CTX_new(pkey, impl);
else
ctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq);
}
if (ctx == NULL)
return NULL;
if (rawin) {
EVP_MD_CTX_set_pkey_ctx(mctx, ctx);
switch (pkey_op) {
case EVP_PKEY_OP_SIGN:
rv = EVP_DigestSignInit_ex(mctx, NULL, digestname, libctx, propq,
pkey, NULL);
break;
case EVP_PKEY_OP_VERIFY:
rv = EVP_DigestVerifyInit_ex(mctx, NULL, digestname, libctx, propq,
pkey, NULL);
break;
}
} else {
switch (pkey_op) {
case EVP_PKEY_OP_SIGN:
rv = EVP_PKEY_sign_init(ctx);
break;
case EVP_PKEY_OP_VERIFY:
rv = EVP_PKEY_verify_init(ctx);
break;
case EVP_PKEY_OP_VERIFYRECOVER:
rv = EVP_PKEY_verify_recover_init(ctx);
break;
case EVP_PKEY_OP_ENCRYPT:
rv = EVP_PKEY_encrypt_init(ctx);
break;
case EVP_PKEY_OP_DECRYPT:
rv = EVP_PKEY_decrypt_init(ctx);
break;
case EVP_PKEY_OP_DERIVE:
rv = EVP_PKEY_derive_init(ctx);
break;
case EVP_PKEY_OP_ENCAPSULATE:
rv = EVP_PKEY_encapsulate_init(ctx, NULL);
if (rv > 0 && kemop != NULL)
rv = EVP_PKEY_CTX_set_kem_op(ctx, kemop);
break;
case EVP_PKEY_OP_DECAPSULATE:
rv = EVP_PKEY_decapsulate_init(ctx, NULL);
if (rv > 0 && kemop != NULL)
rv = EVP_PKEY_CTX_set_kem_op(ctx, kemop);
break;
}
}
if (rv <= 0) {
EVP_PKEY_CTX_free(ctx);
ctx = NULL;
}
return ctx;
}
static int setup_peer(EVP_PKEY_CTX *ctx, int peerform, const char *file,
ENGINE *e)
{
EVP_PKEY *peer = NULL;
ENGINE *engine = NULL;
int ret;
if (peerform == FORMAT_ENGINE)
engine = e;
peer = load_pubkey(file, peerform, 0, NULL, engine, "peer key");
if (peer == NULL) {
BIO_printf(bio_err, "Error reading peer key %s\n", file);
return 0;
}
ret = EVP_PKEY_derive_set_peer(ctx, peer) > 0;
EVP_PKEY_free(peer);
return ret;
}
static int do_keyop(EVP_PKEY_CTX *ctx, int pkey_op,
unsigned char *out, size_t *poutlen,
const unsigned char *in, size_t inlen,
unsigned char *secret, size_t *pseclen)
{
int rv = 0;
switch (pkey_op) {
case EVP_PKEY_OP_VERIFYRECOVER:
rv = EVP_PKEY_verify_recover(ctx, out, poutlen, in, inlen);
break;
case EVP_PKEY_OP_SIGN:
rv = EVP_PKEY_sign(ctx, out, poutlen, in, inlen);
break;
case EVP_PKEY_OP_ENCRYPT:
rv = EVP_PKEY_encrypt(ctx, out, poutlen, in, inlen);
break;
case EVP_PKEY_OP_DECRYPT:
rv = EVP_PKEY_decrypt(ctx, out, poutlen, in, inlen);
break;
case EVP_PKEY_OP_DERIVE:
rv = EVP_PKEY_derive(ctx, out, poutlen);
break;
case EVP_PKEY_OP_ENCAPSULATE:
rv = EVP_PKEY_encapsulate(ctx, out, poutlen, secret, pseclen);
break;
case EVP_PKEY_OP_DECAPSULATE:
rv = EVP_PKEY_decapsulate(ctx, out, poutlen, in, inlen);
break;
}
return rv;
}
#define TBUF_MAXSIZE 2048
static int do_raw_keyop(int pkey_op, EVP_MD_CTX *mctx,
EVP_PKEY *pkey, BIO *in,
int filesize, unsigned char *sig, int siglen,
unsigned char **out, size_t *poutlen)
{
int rv = 0;
unsigned char tbuf[TBUF_MAXSIZE];
unsigned char *mbuf = NULL;
int buf_len = 0;
/* Some algorithms only support oneshot digests */
if (only_rawin(pkey)) {
if (filesize < 0) {
BIO_printf(bio_err,
"Error: unable to determine file size for oneshot operation\n");
goto end;
}
mbuf = app_malloc(filesize, "oneshot sign/verify buffer");
switch (pkey_op) {
case EVP_PKEY_OP_VERIFY:
buf_len = BIO_read(in, mbuf, filesize);
if (buf_len != filesize) {
BIO_printf(bio_err, "Error reading raw input data\n");
goto end;
}
rv = EVP_DigestVerify(mctx, sig, (size_t)siglen, mbuf, buf_len);
break;
case EVP_PKEY_OP_SIGN:
buf_len = BIO_read(in, mbuf, filesize);
if (buf_len != filesize) {
BIO_printf(bio_err, "Error reading raw input data\n");
goto end;
}
rv = EVP_DigestSign(mctx, NULL, poutlen, mbuf, buf_len);
if (rv == 1 && out != NULL) {
*out = app_malloc(*poutlen, "buffer output");
rv = EVP_DigestSign(mctx, *out, poutlen, mbuf, buf_len);
}
break;
}
goto end;
}
switch (pkey_op) {
case EVP_PKEY_OP_VERIFY:
for (;;) {
buf_len = BIO_read(in, tbuf, TBUF_MAXSIZE);
if (buf_len == 0)
break;
if (buf_len < 0) {
BIO_printf(bio_err, "Error reading raw input data\n");
goto end;
}
rv = EVP_DigestVerifyUpdate(mctx, tbuf, (size_t)buf_len);
if (rv != 1) {
BIO_printf(bio_err, "Error verifying raw input data\n");
goto end;
}
}
rv = EVP_DigestVerifyFinal(mctx, sig, (size_t)siglen);
break;
case EVP_PKEY_OP_SIGN:
for (;;) {
buf_len = BIO_read(in, tbuf, TBUF_MAXSIZE);
if (buf_len == 0)
break;
if (buf_len < 0) {
BIO_printf(bio_err, "Error reading raw input data\n");
goto end;
}
rv = EVP_DigestSignUpdate(mctx, tbuf, (size_t)buf_len);
if (rv != 1) {
BIO_printf(bio_err, "Error signing raw input data\n");
goto end;
}
}
rv = EVP_DigestSignFinal(mctx, NULL, poutlen);
if (rv == 1 && out != NULL) {
*out = app_malloc(*poutlen, "buffer output");
rv = EVP_DigestSignFinal(mctx, *out, poutlen);
}
break;
}
end:
OPENSSL_free(mbuf);
return rv;
}
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