- /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
- * project 2006.
- */
- /* ====================================================================
- * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
- *
- * 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 above 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 acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED 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 OpenSSL PROJECT OR
- * ITS 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.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com). */
-
- #include <openssl/evp.h>
-
- #include <limits.h>
- #include <string.h>
-
- #include <openssl/bn.h>
- #include <openssl/buf.h>
- #include <openssl/bytestring.h>
- #include <openssl/digest.h>
- #include <openssl/err.h>
- #include <openssl/mem.h>
- #include <openssl/obj.h>
- #include <openssl/rsa.h>
-
- #include "../rsa/internal.h"
- #include "internal.h"
-
-
- typedef struct {
- /* Key gen parameters */
- int nbits;
- BIGNUM *pub_exp;
- /* RSA padding mode */
- int pad_mode;
- /* message digest */
- const EVP_MD *md;
- /* message digest for MGF1 */
- const EVP_MD *mgf1md;
- /* PSS salt length */
- int saltlen;
- /* tbuf is a buffer which is either NULL, or is the size of the RSA modulus.
- * It's used to store the output of RSA operations. */
- uint8_t *tbuf;
- /* OAEP label */
- uint8_t *oaep_label;
- size_t oaep_labellen;
- } RSA_PKEY_CTX;
-
- static int pkey_rsa_init(EVP_PKEY_CTX *ctx) {
- RSA_PKEY_CTX *rctx;
- rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
- if (!rctx) {
- return 0;
- }
- memset(rctx, 0, sizeof(RSA_PKEY_CTX));
-
- rctx->nbits = 2048;
- rctx->pad_mode = RSA_PKCS1_PADDING;
- rctx->saltlen = -2;
-
- ctx->data = rctx;
-
- return 1;
- }
-
- static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) {
- RSA_PKEY_CTX *dctx, *sctx;
- if (!pkey_rsa_init(dst)) {
- return 0;
- }
- sctx = src->data;
- dctx = dst->data;
- dctx->nbits = sctx->nbits;
- if (sctx->pub_exp) {
- dctx->pub_exp = BN_dup(sctx->pub_exp);
- if (!dctx->pub_exp) {
- return 0;
- }
- }
-
- dctx->pad_mode = sctx->pad_mode;
- dctx->md = sctx->md;
- dctx->mgf1md = sctx->mgf1md;
- if (sctx->oaep_label) {
- OPENSSL_free(dctx->oaep_label);
- dctx->oaep_label = BUF_memdup(sctx->oaep_label, sctx->oaep_labellen);
- if (!dctx->oaep_label) {
- return 0;
- }
- dctx->oaep_labellen = sctx->oaep_labellen;
- }
-
- return 1;
- }
-
- static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx) {
- RSA_PKEY_CTX *rctx = ctx->data;
-
- if (rctx == NULL) {
- return;
- }
-
- BN_free(rctx->pub_exp);
- OPENSSL_free(rctx->tbuf);
- OPENSSL_free(rctx->oaep_label);
- OPENSSL_free(rctx);
- }
-
- static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk) {
- if (ctx->tbuf) {
- return 1;
- }
- ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
- if (!ctx->tbuf) {
- return 0;
- }
- return 1;
- }
-
- static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, uint8_t *sig, size_t *siglen,
- const uint8_t *tbs, size_t tbslen) {
- RSA_PKEY_CTX *rctx = ctx->data;
- RSA *rsa = ctx->pkey->pkey.rsa;
- const size_t key_len = EVP_PKEY_size(ctx->pkey);
-
- if (!sig) {
- *siglen = key_len;
- return 1;
- }
-
- if (*siglen < key_len) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_BUFFER_TOO_SMALL);
- return 0;
- }
-
- if (rctx->md) {
- unsigned int out_len;
-
- if (tbslen != EVP_MD_size(rctx->md)) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_DIGEST_LENGTH);
- return 0;
- }
-
- if (EVP_MD_type(rctx->md) == NID_mdc2) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_NO_MDC2_SUPPORT);
- return 0;
- }
-
- switch (rctx->pad_mode) {
- case RSA_PKCS1_PADDING:
- if (!RSA_sign(EVP_MD_type(rctx->md), tbs, tbslen, sig, &out_len, rsa)) {
- return 0;
- }
- *siglen = out_len;
- return 1;
-
- case RSA_PKCS1_PSS_PADDING:
- if (!setup_tbuf(rctx, ctx) ||
- !RSA_padding_add_PKCS1_PSS_mgf1(rsa, rctx->tbuf, tbs, rctx->md,
- rctx->mgf1md, rctx->saltlen) ||
- !RSA_sign_raw(rsa, siglen, sig, *siglen, rctx->tbuf, key_len,
- RSA_NO_PADDING)) {
- return 0;
- }
- return 1;
-
- default:
- return 0;
- }
- }
-
- return RSA_sign_raw(rsa, siglen, sig, *siglen, tbs, tbslen, rctx->pad_mode);
- }
-
- static int pkey_rsa_verify(EVP_PKEY_CTX *ctx, const uint8_t *sig,
- size_t siglen, const uint8_t *tbs,
- size_t tbslen) {
- RSA_PKEY_CTX *rctx = ctx->data;
- RSA *rsa = ctx->pkey->pkey.rsa;
- size_t rslen;
- const size_t key_len = EVP_PKEY_size(ctx->pkey);
-
- if (rctx->md) {
- switch (rctx->pad_mode) {
- case RSA_PKCS1_PADDING:
- return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen, sig, siglen, rsa);
-
- case RSA_PKCS1_PSS_PADDING:
- if (!setup_tbuf(rctx, ctx) ||
- !RSA_verify_raw(rsa, &rslen, rctx->tbuf, key_len, sig, siglen,
- RSA_NO_PADDING) ||
- !RSA_verify_PKCS1_PSS_mgf1(rsa, tbs, rctx->md, rctx->mgf1md,
- rctx->tbuf, rctx->saltlen)) {
- return 0;
- }
- return 1;
-
- default:
- return 0;
- }
- }
-
- if (!setup_tbuf(rctx, ctx) ||
- !RSA_verify_raw(rsa, &rslen, rctx->tbuf, key_len, sig, siglen,
- rctx->pad_mode) ||
- rslen != tbslen ||
- CRYPTO_memcmp(tbs, rctx->tbuf, rslen) != 0) {
- return 0;
- }
-
- return 1;
- }
-
- static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx, uint8_t *out, size_t *outlen,
- const uint8_t *in, size_t inlen) {
- RSA_PKEY_CTX *rctx = ctx->data;
- RSA *rsa = ctx->pkey->pkey.rsa;
- const size_t key_len = EVP_PKEY_size(ctx->pkey);
-
- if (!out) {
- *outlen = key_len;
- return 1;
- }
-
- if (*outlen < key_len) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_BUFFER_TOO_SMALL);
- return 0;
- }
-
- if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
- if (!setup_tbuf(rctx, ctx) ||
- !RSA_padding_add_PKCS1_OAEP_mgf1(rctx->tbuf, key_len, in, inlen,
- rctx->oaep_label, rctx->oaep_labellen,
- rctx->md, rctx->mgf1md) ||
- !RSA_encrypt(rsa, outlen, out, *outlen, rctx->tbuf, key_len,
- RSA_NO_PADDING)) {
- return 0;
- }
- return 1;
- }
-
- return RSA_encrypt(rsa, outlen, out, *outlen, in, inlen, rctx->pad_mode);
- }
-
- static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx, uint8_t *out,
- size_t *outlen, const uint8_t *in,
- size_t inlen) {
- RSA_PKEY_CTX *rctx = ctx->data;
- RSA *rsa = ctx->pkey->pkey.rsa;
- const size_t key_len = EVP_PKEY_size(ctx->pkey);
-
- if (!out) {
- *outlen = key_len;
- return 1;
- }
-
- if (*outlen < key_len) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_BUFFER_TOO_SMALL);
- return 0;
- }
-
- if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
- size_t plaintext_len;
- int message_len;
-
- if (!setup_tbuf(rctx, ctx) ||
- !RSA_decrypt(rsa, &plaintext_len, rctx->tbuf, key_len, in, inlen,
- RSA_NO_PADDING)) {
- return 0;
- }
-
- message_len = RSA_padding_check_PKCS1_OAEP_mgf1(
- out, key_len, rctx->tbuf, plaintext_len, rctx->oaep_label,
- rctx->oaep_labellen, rctx->md, rctx->mgf1md);
- if (message_len < 0) {
- return 0;
- }
- *outlen = message_len;
- return 1;
- }
-
- return RSA_decrypt(rsa, outlen, out, key_len, in, inlen, rctx->pad_mode);
- }
-
- static int check_padding_md(const EVP_MD *md, int padding) {
- if (!md) {
- return 1;
- }
-
- if (padding == RSA_NO_PADDING) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_PADDING_MODE);
- return 0;
- }
-
- return 1;
- }
-
- static int is_known_padding(int padding_mode) {
- switch (padding_mode) {
- case RSA_PKCS1_PADDING:
- case RSA_NO_PADDING:
- case RSA_PKCS1_OAEP_PADDING:
- case RSA_PKCS1_PSS_PADDING:
- return 1;
- default:
- return 0;
- }
- }
-
- static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) {
- RSA_PKEY_CTX *rctx = ctx->data;
- switch (type) {
- case EVP_PKEY_CTRL_RSA_PADDING:
- if (!is_known_padding(p1) || !check_padding_md(rctx->md, p1) ||
- (p1 == RSA_PKCS1_PSS_PADDING &&
- 0 == (ctx->operation & (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY))) ||
- (p1 == RSA_PKCS1_OAEP_PADDING &&
- 0 == (ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
- return 0;
- }
- if ((p1 == RSA_PKCS1_PSS_PADDING || p1 == RSA_PKCS1_OAEP_PADDING) &&
- rctx->md == NULL) {
- rctx->md = EVP_sha1();
- }
- rctx->pad_mode = p1;
- return 1;
-
- case EVP_PKEY_CTRL_GET_RSA_PADDING:
- *(int *)p2 = rctx->pad_mode;
- return 1;
-
- case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
- case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
- if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_PSS_SALTLEN);
- return 0;
- }
- if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN) {
- *(int *)p2 = rctx->saltlen;
- } else {
- if (p1 < -2) {
- return 0;
- }
- rctx->saltlen = p1;
- }
- return 1;
-
- case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
- if (p1 < 256) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_KEYBITS);
- return 0;
- }
- rctx->nbits = p1;
- return 1;
-
- case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
- if (!p2) {
- return 0;
- }
- BN_free(rctx->pub_exp);
- rctx->pub_exp = p2;
- return 1;
-
- case EVP_PKEY_CTRL_RSA_OAEP_MD:
- case EVP_PKEY_CTRL_GET_RSA_OAEP_MD:
- if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_PADDING_MODE);
- return 0;
- }
- if (type == EVP_PKEY_CTRL_GET_RSA_OAEP_MD) {
- *(const EVP_MD **)p2 = rctx->md;
- } else {
- rctx->md = p2;
- }
- return 1;
-
- case EVP_PKEY_CTRL_MD:
- if (!check_padding_md(p2, rctx->pad_mode)) {
- return 0;
- }
- rctx->md = p2;
- return 1;
-
- case EVP_PKEY_CTRL_GET_MD:
- *(const EVP_MD **)p2 = rctx->md;
- return 1;
-
- case EVP_PKEY_CTRL_RSA_MGF1_MD:
- case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
- if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING &&
- rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_MGF1_MD);
- return 0;
- }
- if (type == EVP_PKEY_CTRL_GET_RSA_MGF1_MD) {
- if (rctx->mgf1md) {
- *(const EVP_MD **)p2 = rctx->mgf1md;
- } else {
- *(const EVP_MD **)p2 = rctx->md;
- }
- } else {
- rctx->mgf1md = p2;
- }
- return 1;
-
- case EVP_PKEY_CTRL_RSA_OAEP_LABEL:
- if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_PADDING_MODE);
- return 0;
- }
- OPENSSL_free(rctx->oaep_label);
- if (p2 && p1 > 0) {
- /* TODO(fork): this seems wrong. Shouldn't it take a copy of the
- * buffer? */
- rctx->oaep_label = p2;
- rctx->oaep_labellen = p1;
- } else {
- rctx->oaep_label = NULL;
- rctx->oaep_labellen = 0;
- }
- return 1;
-
- case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL:
- if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
- OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_PADDING_MODE);
- return 0;
- }
- CBS_init((CBS *)p2, rctx->oaep_label, rctx->oaep_labellen);
- return 1;
-
- default:
- OPENSSL_PUT_ERROR(EVP, EVP_R_COMMAND_NOT_SUPPORTED);
- return 0;
- }
- }
-
- static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) {
- RSA *rsa = NULL;
- RSA_PKEY_CTX *rctx = ctx->data;
-
- if (!rctx->pub_exp) {
- rctx->pub_exp = BN_new();
- if (!rctx->pub_exp || !BN_set_word(rctx->pub_exp, RSA_F4)) {
- return 0;
- }
- }
- rsa = RSA_new();
- if (!rsa) {
- return 0;
- }
-
- if (!RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, NULL)) {
- RSA_free(rsa);
- return 0;
- }
-
- EVP_PKEY_assign_RSA(pkey, rsa);
- return 1;
- }
-
- const EVP_PKEY_METHOD rsa_pkey_meth = {
- EVP_PKEY_RSA, 0 /* flags */, pkey_rsa_init,
- pkey_rsa_copy, pkey_rsa_cleanup, 0 /* paramgen_init */,
- 0 /* paramgen */, 0 /* keygen_init */, pkey_rsa_keygen,
- 0 /* sign_init */, pkey_rsa_sign, 0 /* verify_init */,
- pkey_rsa_verify, 0 /* encrypt_init */, pkey_rsa_encrypt,
- 0 /* decrypt_init */, pkey_rsa_decrypt, 0 /* derive_init */,
- 0 /* derive */, pkey_rsa_ctrl,
- };
-
- int EVP_PKEY_CTX_set_rsa_padding(EVP_PKEY_CTX *ctx, int padding) {
- return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, -1, EVP_PKEY_CTRL_RSA_PADDING,
- padding, NULL);
- }
-
- int EVP_PKEY_CTX_get_rsa_padding(EVP_PKEY_CTX *ctx, int *out_padding) {
- return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, -1, EVP_PKEY_CTRL_GET_RSA_PADDING,
- 0, out_padding);
- }
-
- int EVP_PKEY_CTX_set_rsa_pss_saltlen(EVP_PKEY_CTX *ctx, int salt_len) {
- return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA,
- (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY),
- EVP_PKEY_CTRL_RSA_PSS_SALTLEN, salt_len, NULL);
- }
-
- int EVP_PKEY_CTX_get_rsa_pss_saltlen(EVP_PKEY_CTX *ctx, int *out_salt_len) {
- return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA,
- (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY),
- EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN, 0, out_salt_len);
- }
-
- int EVP_PKEY_CTX_set_rsa_keygen_bits(EVP_PKEY_CTX *ctx, int bits) {
- return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_KEYGEN,
- EVP_PKEY_CTRL_RSA_KEYGEN_BITS, bits, NULL);
- }
-
- int EVP_PKEY_CTX_set_rsa_keygen_pubexp(EVP_PKEY_CTX *ctx, BIGNUM *e) {
- return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_KEYGEN,
- EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP, 0, e);
- }
-
- int EVP_PKEY_CTX_set_rsa_oaep_md(EVP_PKEY_CTX *ctx, const EVP_MD *md) {
- return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,
- EVP_PKEY_CTRL_RSA_OAEP_MD, 0, (void *)md);
- }
-
- int EVP_PKEY_CTX_get_rsa_oaep_md(EVP_PKEY_CTX *ctx, const EVP_MD **out_md) {
- return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,
- EVP_PKEY_CTRL_GET_RSA_OAEP_MD, 0, (void*) out_md);
- }
-
- int EVP_PKEY_CTX_set_rsa_mgf1_md(EVP_PKEY_CTX *ctx, const EVP_MD *md) {
- return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA,
- EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT,
- EVP_PKEY_CTRL_RSA_MGF1_MD, 0, (void*) md);
- }
-
- int EVP_PKEY_CTX_get_rsa_mgf1_md(EVP_PKEY_CTX *ctx, const EVP_MD **out_md) {
- return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA,
- EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT,
- EVP_PKEY_CTRL_GET_RSA_MGF1_MD, 0, (void*) out_md);
- }
-
- int EVP_PKEY_CTX_set0_rsa_oaep_label(EVP_PKEY_CTX *ctx, const uint8_t *label,
- size_t label_len) {
- int label_len_int = label_len;
- if (((size_t) label_len_int) != label_len) {
- return 0;
- }
-
- return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,
- EVP_PKEY_CTRL_RSA_OAEP_LABEL, label_len,
- (void *)label);
- }
-
- int EVP_PKEY_CTX_get0_rsa_oaep_label(EVP_PKEY_CTX *ctx,
- const uint8_t **out_label) {
- CBS label;
- if (!EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,
- EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL, 0, &label)) {
- return -1;
- }
- if (CBS_len(&label) > INT_MAX) {
- OPENSSL_PUT_ERROR(EVP, ERR_R_OVERFLOW);
- return -1;
- }
- *out_label = CBS_data(&label);
- return (int)CBS_len(&label);
- }
|