MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt)
{
    EVP_PKEY *pkey = NULL;
    unsigned char *sig, *data;
    int al, ret = MSG_PROCESS_ERROR;
    int type = 0, j;
    unsigned int len;
    X509 *peer;
    const EVP_MD *md = NULL;
    long hdatalen = 0;
    void *hdata;
    EVP_MD_CTX *mctx = EVP_MD_CTX_new();
    if (mctx == NULL) {
        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_MALLOC_FAILURE);
        al = SSL_AD_INTERNAL_ERROR;
        goto f_err;
    }
    peer = s->session->peer;
    pkey = X509_get0_pubkey(peer);
    type = X509_certificate_type(peer, pkey);
    if (!(type & EVP_PKT_SIGN)) {
        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY,
               SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
        al = SSL_AD_ILLEGAL_PARAMETER;
        goto f_err;
    }
#ifndef OPENSSL_NO_GOST
    if (PACKET_remaining(pkt) == 64 && pkey->type == NID_id_GostR3410_2001) {
        len = 64;
    } else
#endif
    {
        if (SSL_USE_SIGALGS(s)) {
            int rv;
            if (!PACKET_get_bytes(pkt, &sig, 2)) {
                al = SSL_AD_DECODE_ERROR;
                goto f_err;
            }
            rv = tls12_check_peer_sigalg(&md, s, sig, pkey);
            if (rv == -1) {
                al = SSL_AD_INTERNAL_ERROR;
                goto f_err;
            } else if (rv == 0) {
                al = SSL_AD_DECODE_ERROR;
                goto f_err;
            }
#ifdef SSL_DEBUG
            fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
#endif
        } else {
            int idx = ssl_cert_type(NULL, pkey);
            if (idx >= 0)
                md = s->s3->tmp.md[idx];
            if (md == NULL) {
                al = SSL_AD_INTERNAL_ERROR;
                goto f_err;
            }
        }
        if (!PACKET_get_net_2(pkt, &len)) {
            SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_LENGTH_MISMATCH);
            al = SSL_AD_DECODE_ERROR;
            goto f_err;
        }
    }
    j = EVP_PKEY_size(pkey);
    if (((int)len > j) || ((int)PACKET_remaining(pkt) > j)
            || (PACKET_remaining(pkt) == 0)) {
        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_WRONG_SIGNATURE_SIZE);
        al = SSL_AD_DECODE_ERROR;
        goto f_err;
    }
    if (!PACKET_get_bytes(pkt, &data, len)) {
        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_LENGTH_MISMATCH);
        al = SSL_AD_DECODE_ERROR;
        goto f_err;
    }
    hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
    if (hdatalen <= 0) {
        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
        al = SSL_AD_INTERNAL_ERROR;
        goto f_err;
    }
#ifdef SSL_DEBUG
    fprintf(stderr, "Using client verify alg %s\n", EVP_MD_name(md));
#endif
    if (!EVP_VerifyInit_ex(mctx, md, NULL)
        || !EVP_VerifyUpdate(mctx, hdata, hdatalen)) {
        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_EVP_LIB);
        al = SSL_AD_INTERNAL_ERROR;
        goto f_err;
    }
#ifndef OPENSSL_NO_GOST
    if (pkey->type == NID_id_GostR3410_2001
            || pkey->type == NID_id_GostR3410_2012_256
            || pkey->type == NID_id_GostR3410_2012_512) {
        BUF_reverse(data, NULL, len);
    }
#endif
    if (s->version == SSL3_VERSION
        && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
                            s->session->master_key_length,
                            s->session->master_key)) {
        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_EVP_LIB);
        al = SSL_AD_INTERNAL_ERROR;
        goto f_err;
    }
    if (EVP_VerifyFinal(mctx, data, len, pkey) <= 0) {
        al = SSL_AD_DECRYPT_ERROR;
        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_SIGNATURE);
        goto f_err;
    }
    ret = MSG_PROCESS_CONTINUE_PROCESSING;
    if (0) {
 f_err:
        ssl3_send_alert(s, SSL3_AL_FATAL, al);
        ossl_statem_set_error(s);
    }
    BIO_free(s->s3->handshake_buffer);
    s->s3->handshake_buffer = NULL;
    EVP_MD_CTX_free(mctx);
    return ret;
}
['MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt)\n{\n    EVP_PKEY *pkey = NULL;\n    unsigned char *sig, *data;\n    int al, ret = MSG_PROCESS_ERROR;\n    int type = 0, j;\n    unsigned int len;\n    X509 *peer;\n    const EVP_MD *md = NULL;\n    long hdatalen = 0;\n    void *hdata;\n    EVP_MD_CTX *mctx = EVP_MD_CTX_new();\n    if (mctx == NULL) {\n        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_MALLOC_FAILURE);\n        al = SSL_AD_INTERNAL_ERROR;\n        goto f_err;\n    }\n    peer = s->session->peer;\n    pkey = X509_get0_pubkey(peer);\n    type = X509_certificate_type(peer, pkey);\n    if (!(type & EVP_PKT_SIGN)) {\n        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY,\n               SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);\n        al = SSL_AD_ILLEGAL_PARAMETER;\n        goto f_err;\n    }\n#ifndef OPENSSL_NO_GOST\n    if (PACKET_remaining(pkt) == 64 && pkey->type == NID_id_GostR3410_2001) {\n        len = 64;\n    } else\n#endif\n    {\n        if (SSL_USE_SIGALGS(s)) {\n            int rv;\n            if (!PACKET_get_bytes(pkt, &sig, 2)) {\n                al = SSL_AD_DECODE_ERROR;\n                goto f_err;\n            }\n            rv = tls12_check_peer_sigalg(&md, s, sig, pkey);\n            if (rv == -1) {\n                al = SSL_AD_INTERNAL_ERROR;\n                goto f_err;\n            } else if (rv == 0) {\n                al = SSL_AD_DECODE_ERROR;\n                goto f_err;\n            }\n#ifdef SSL_DEBUG\n            fprintf(stderr, "USING TLSv1.2 HASH %s\\n", EVP_MD_name(md));\n#endif\n        } else {\n            int idx = ssl_cert_type(NULL, pkey);\n            if (idx >= 0)\n                md = s->s3->tmp.md[idx];\n            if (md == NULL) {\n                al = SSL_AD_INTERNAL_ERROR;\n                goto f_err;\n            }\n        }\n        if (!PACKET_get_net_2(pkt, &len)) {\n            SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_LENGTH_MISMATCH);\n            al = SSL_AD_DECODE_ERROR;\n            goto f_err;\n        }\n    }\n    j = EVP_PKEY_size(pkey);\n    if (((int)len > j) || ((int)PACKET_remaining(pkt) > j)\n            || (PACKET_remaining(pkt) == 0)) {\n        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_WRONG_SIGNATURE_SIZE);\n        al = SSL_AD_DECODE_ERROR;\n        goto f_err;\n    }\n    if (!PACKET_get_bytes(pkt, &data, len)) {\n        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_LENGTH_MISMATCH);\n        al = SSL_AD_DECODE_ERROR;\n        goto f_err;\n    }\n    hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);\n    if (hdatalen <= 0) {\n        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_INTERNAL_ERROR);\n        al = SSL_AD_INTERNAL_ERROR;\n        goto f_err;\n    }\n#ifdef SSL_DEBUG\n    fprintf(stderr, "Using client verify alg %s\\n", EVP_MD_name(md));\n#endif\n    if (!EVP_VerifyInit_ex(mctx, md, NULL)\n        || !EVP_VerifyUpdate(mctx, hdata, hdatalen)) {\n        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_EVP_LIB);\n        al = SSL_AD_INTERNAL_ERROR;\n        goto f_err;\n    }\n#ifndef OPENSSL_NO_GOST\n    if (pkey->type == NID_id_GostR3410_2001\n            || pkey->type == NID_id_GostR3410_2012_256\n            || pkey->type == NID_id_GostR3410_2012_512) {\n        BUF_reverse(data, NULL, len);\n    }\n#endif\n    if (s->version == SSL3_VERSION\n        && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,\n                            s->session->master_key_length,\n                            s->session->master_key)) {\n        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_EVP_LIB);\n        al = SSL_AD_INTERNAL_ERROR;\n        goto f_err;\n    }\n    if (EVP_VerifyFinal(mctx, data, len, pkey) <= 0) {\n        al = SSL_AD_DECRYPT_ERROR;\n        SSLerr(SSL_F_TLS_PROCESS_CERT_VERIFY, SSL_R_BAD_SIGNATURE);\n        goto f_err;\n    }\n    ret = MSG_PROCESS_CONTINUE_PROCESSING;\n    if (0) {\n f_err:\n        ssl3_send_alert(s, SSL3_AL_FATAL, al);\n        ossl_statem_set_error(s);\n    }\n    BIO_free(s->s3->handshake_buffer);\n    s->s3->handshake_buffer = NULL;\n    EVP_MD_CTX_free(mctx);\n    return ret;\n}', 'EVP_MD_CTX *EVP_MD_CTX_new(void)\n{\n    return OPENSSL_zalloc(sizeof(EVP_MD_CTX));\n}', 'void *CRYPTO_zalloc(size_t num, const char *file, int line)\n{\n    void *ret = CRYPTO_malloc(num, file, line);\n    if (ret != NULL)\n        memset(ret, 0, num);\n    return ret;\n}', 'void *CRYPTO_malloc(size_t num, const char *file, int line)\n{\n    void *ret = NULL;\n    if (num <= 0)\n        return NULL;\n    allow_customize = 0;\n#ifndef OPENSSL_NO_CRYPTO_MDEBUG\n    if (call_malloc_debug) {\n        CRYPTO_mem_debug_malloc(NULL, num, 0, file, line);\n        ret = malloc(num);\n        CRYPTO_mem_debug_malloc(ret, num, 1, file, line);\n    } else {\n        ret = malloc(num);\n    }\n#else\n    (void)file;\n    (void)line;\n    ret = malloc(num);\n#endif\n#ifndef OPENSSL_CPUID_OBJ\n    if (ret && (num > 2048)) {\n        extern unsigned char cleanse_ctr;\n        ((unsigned char *)ret)[0] = cleanse_ctr;\n    }\n#endif\n    return ret;\n}', 'EVP_PKEY *X509_get0_pubkey(X509 *x)\n{\n    if (x == NULL)\n        return NULL;\n    return X509_PUBKEY_get0(x->cert_info.key);\n}', 'EVP_PKEY *X509_PUBKEY_get0(X509_PUBKEY *key)\n{\n    EVP_PKEY *ret = NULL;\n    if (key == NULL)\n        goto error;\n    if (key->pkey != NULL)\n        return key->pkey;\n    if (key->public_key == NULL)\n        goto error;\n    if ((ret = EVP_PKEY_new()) == NULL) {\n        X509err(X509_F_X509_PUBKEY_GET0, ERR_R_MALLOC_FAILURE);\n        goto error;\n    }\n    if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) {\n        X509err(X509_F_X509_PUBKEY_GET0, X509_R_UNSUPPORTED_ALGORITHM);\n        goto error;\n    }\n    if (ret->ameth->pub_decode) {\n        if (!ret->ameth->pub_decode(ret, key)) {\n            X509err(X509_F_X509_PUBKEY_GET0, X509_R_PUBLIC_KEY_DECODE_ERROR);\n            goto error;\n        }\n    } else {\n        X509err(X509_F_X509_PUBKEY_GET0, X509_R_METHOD_NOT_SUPPORTED);\n        goto error;\n    }\n    CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);\n    if (key->pkey) {\n        CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);\n        EVP_PKEY_free(ret);\n        ret = key->pkey;\n    } else {\n        key->pkey = ret;\n        CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);\n    }\n    return ret;\n error:\n    EVP_PKEY_free(ret);\n    return (NULL);\n}', 'void EVP_PKEY_free(EVP_PKEY *x)\n{\n    int i;\n    if (x == NULL)\n        return;\n    i = CRYPTO_add(&x->references, -1, CRYPTO_LOCK_EVP_PKEY);\n#ifdef REF_PRINT\n    REF_PRINT("EVP_PKEY", x);\n#endif\n    if (i > 0)\n        return;\n#ifdef REF_CHECK\n    if (i < 0) {\n        fprintf(stderr, "EVP_PKEY_free, bad reference count\\n");\n        abort();\n    }\n#endif\n    EVP_PKEY_free_it(x);\n    sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);\n    OPENSSL_free(x);\n}']