#include "record_local.h"
#include "internal/cryptlib.h"
-static const unsigned char ssl3_pad_1[48] = {
- 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
- 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
- 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
- 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
- 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
- 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36
-};
-
-static const unsigned char ssl3_pad_2[48] = {
- 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
- 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
- 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
- 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
- 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
- 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c
-};
-
-/*
- * Clear the contents of an SSL3_RECORD but retain any memory allocated
- */
-void SSL3_RECORD_clear(SSL3_RECORD *r, size_t num_recs)
-{
- unsigned char *comp;
- size_t i;
-
- for (i = 0; i < num_recs; i++) {
- comp = r[i].comp;
-
- memset(&r[i], 0, sizeof(*r));
- r[i].comp = comp;
- }
-}
-
void SSL3_RECORD_release(SSL3_RECORD *r, size_t num_recs)
{
size_t i;
return 1;
}
-
-int ssl3_do_uncompress(SSL_CONNECTION *ssl, SSL3_RECORD *rr)
-{
-#ifndef OPENSSL_NO_COMP
- int i;
-
- if (rr->comp == NULL) {
- rr->comp = (unsigned char *)
- OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
- }
- if (rr->comp == NULL)
- return 0;
-
- i = COMP_expand_block(ssl->expand, rr->comp,
- SSL3_RT_MAX_PLAIN_LENGTH, rr->data, (int)rr->length);
- if (i < 0)
- return 0;
- else
- rr->length = i;
- rr->data = rr->comp;
-#endif
- return 1;
-}
-
-int ssl3_do_compress(SSL_CONNECTION *sc, SSL3_RECORD *wr)
-{
-#ifndef OPENSSL_NO_COMP
- int i;
-
- i = COMP_compress_block(sc->compress, wr->data,
- (int)(wr->length + SSL3_RT_MAX_COMPRESSED_OVERHEAD),
- wr->input, (int)wr->length);
- if (i < 0)
- return 0;
- else
- wr->length = i;
-
- wr->input = wr->data;
-#endif
- return 1;
-}
-
-/*-
- * ssl3_enc encrypts/decrypts |n_recs| records in |inrecs|. Calls SSLfatal on
- * internal error, but not otherwise. It is the responsibility of the caller to
- * report a bad_record_mac
- *
- * Returns:
- * 0: if the record is publicly invalid, or an internal error
- * 1: Success or Mac-then-encrypt decryption failed (MAC will be randomised)
- */
-int ssl3_enc(SSL_CONNECTION *s, SSL3_RECORD *inrecs, size_t n_recs, int sending,
- SSL_MAC_BUF *mac, size_t macsize)
-{
- SSL3_RECORD *rec;
- EVP_CIPHER_CTX *ds;
- size_t l, i;
- size_t bs;
- const EVP_CIPHER *enc;
-
- rec = inrecs;
- /*
- * We shouldn't ever be called with more than one record in the SSLv3 case
- */
- if (n_recs != 1)
- return 0;
- if (sending) {
- ds = s->enc_write_ctx;
- if (s->enc_write_ctx == NULL)
- enc = NULL;
- else
- enc = EVP_CIPHER_CTX_get0_cipher(s->enc_write_ctx);
- } else {
- ds = s->enc_read_ctx;
- if (s->enc_read_ctx == NULL)
- enc = NULL;
- else
- enc = EVP_CIPHER_CTX_get0_cipher(s->enc_read_ctx);
- }
-
- if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) {
- memmove(rec->data, rec->input, rec->length);
- rec->input = rec->data;
- } else {
- int provided = (EVP_CIPHER_get0_provider(enc) != NULL);
-
- l = rec->length;
- bs = EVP_CIPHER_CTX_get_block_size(ds);
-
- /* COMPRESS */
-
- if ((bs != 1) && sending && !provided) {
- /*
- * We only do this for legacy ciphers. Provided ciphers add the
- * padding on the provider side.
- */
- i = bs - (l % bs);
-
- /* we need to add 'i-1' padding bytes */
- l += i;
- /*
- * the last of these zero bytes will be overwritten with the
- * padding length.
- */
- memset(&rec->input[rec->length], 0, i);
- rec->length += i;
- rec->input[l - 1] = (unsigned char)(i - 1);
- }
-
- if (!sending) {
- if (l == 0 || l % bs != 0) {
- /* Publicly invalid */
- return 0;
- }
- /* otherwise, rec->length >= bs */
- }
-
- if (EVP_CIPHER_get0_provider(enc) != NULL) {
- int outlen;
-
- if (!EVP_CipherUpdate(ds, rec->data, &outlen, rec->input,
- (unsigned int)l))
- return 0;
- rec->length = outlen;
-
- if (!sending && mac != NULL) {
- /* Now get a pointer to the MAC */
- OSSL_PARAM params[2], *p = params;
-
- /* Get the MAC */
- mac->alloced = 0;
-
- *p++ = OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_TLS_MAC,
- (void **)&mac->mac,
- macsize);
- *p = OSSL_PARAM_construct_end();
-
- if (!EVP_CIPHER_CTX_get_params(ds, params)) {
- /* Shouldn't normally happen */
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
- return 0;
- }
- }
- } else {
- if (EVP_Cipher(ds, rec->data, rec->input, (unsigned int)l) < 1) {
- /* Shouldn't happen */
- SSLfatal(s, SSL_AD_BAD_RECORD_MAC, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- if (!sending)
- return ssl3_cbc_remove_padding_and_mac(&rec->length,
- rec->orig_len,
- rec->data,
- (mac != NULL) ? &mac->mac : NULL,
- (mac != NULL) ? &mac->alloced : NULL,
- bs,
- macsize,
- SSL_CONNECTION_GET_CTX(s)->libctx);
- }
- }
- return 1;
-}
-
-#define MAX_PADDING 256
-/*-
- * tls1_enc encrypts/decrypts |n_recs| in |recs|. Calls SSLfatal on internal
- * error, but not otherwise. It is the responsibility of the caller to report
- * a bad_record_mac - if appropriate (DTLS just drops the record).
- *
- * Returns:
- * 0: if the record is publicly invalid, or an internal error, or AEAD
- * decryption failed, or Encrypt-then-mac decryption failed.
- * 1: Success or Mac-then-encrypt decryption failed (MAC will be randomised)
- */
-int tls1_enc(SSL_CONNECTION *s, SSL3_RECORD *recs, size_t n_recs, int sending,
- SSL_MAC_BUF *macs, size_t macsize)
-{
- EVP_CIPHER_CTX *ds;
- size_t reclen[SSL_MAX_PIPELINES];
- unsigned char buf[SSL_MAX_PIPELINES][EVP_AEAD_TLS1_AAD_LEN];
- int i, pad = 0, tmpr;
- size_t bs, ctr, padnum, loop;
- unsigned char padval;
- const EVP_CIPHER *enc;
- int tlstree_enc = sending ? (s->mac_flags & SSL_MAC_FLAG_WRITE_MAC_TLSTREE)
- : (s->mac_flags & SSL_MAC_FLAG_READ_MAC_TLSTREE);
-
- if (n_recs == 0) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- if (sending) {
- if (EVP_MD_CTX_get0_md(s->write_hash)) {
- int n = EVP_MD_CTX_get_size(s->write_hash);
- if (!ossl_assert(n >= 0)) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
- return 0;
- }
- }
- ds = s->enc_write_ctx;
- if (s->enc_write_ctx == NULL)
- enc = NULL;
- else {
- int ivlen;
-
- enc = EVP_CIPHER_CTX_get0_cipher(s->enc_write_ctx);
- /* For TLSv1.1 and later explicit IV */
- if (SSL_USE_EXPLICIT_IV(s)
- && EVP_CIPHER_get_mode(enc) == EVP_CIPH_CBC_MODE)
- ivlen = EVP_CIPHER_get_iv_length(enc);
- else
- ivlen = 0;
- if (ivlen > 1) {
- for (ctr = 0; ctr < n_recs; ctr++) {
- if (recs[ctr].data != recs[ctr].input) {
- /*
- * we can't write into the input stream: Can this ever
- * happen?? (steve)
- */
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
- return 0;
- } else if (RAND_bytes_ex(SSL_CONNECTION_GET_CTX(s)->libctx,
- recs[ctr].input,
- ivlen, 0) <= 0) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
- return 0;
- }
- }
- }
- }
- } else {
- if (EVP_MD_CTX_get0_md(s->read_hash)) {
- int n = EVP_MD_CTX_get_size(s->read_hash);
- if (!ossl_assert(n >= 0)) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
- return 0;
- }
- }
- ds = s->enc_read_ctx;
- if (s->enc_read_ctx == NULL)
- enc = NULL;
- else
- enc = EVP_CIPHER_CTX_get0_cipher(s->enc_read_ctx);
- }
-
- if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) {
- for (ctr = 0; ctr < n_recs; ctr++) {
- memmove(recs[ctr].data, recs[ctr].input, recs[ctr].length);
- recs[ctr].input = recs[ctr].data;
- }
- } else {
- int provided = (EVP_CIPHER_get0_provider(enc) != NULL);
-
- bs = EVP_CIPHER_get_block_size(EVP_CIPHER_CTX_get0_cipher(ds));
-
- if (n_recs > 1) {
- if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ds))
- & EVP_CIPH_FLAG_PIPELINE) == 0) {
- /*
- * We shouldn't have been called with pipeline data if the
- * cipher doesn't support pipelining
- */
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_PIPELINE_FAILURE);
- return 0;
- }
- }
- for (ctr = 0; ctr < n_recs; ctr++) {
- reclen[ctr] = recs[ctr].length;
-
- if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ds))
- & EVP_CIPH_FLAG_AEAD_CIPHER) != 0) {
- unsigned char *seq;
-
- seq = sending ? RECORD_LAYER_get_write_sequence(&s->rlayer)
- : RECORD_LAYER_get_read_sequence(&s->rlayer);
-
- if (SSL_CONNECTION_IS_DTLS(s)) {
- /* DTLS does not support pipelining */
- unsigned char dtlsseq[8], *p = dtlsseq;
-
- s2n(sending ? DTLS_RECORD_LAYER_get_w_epoch(&s->rlayer) :
- DTLS_RECORD_LAYER_get_r_epoch(&s->rlayer), p);
- memcpy(p, &seq[2], 6);
- memcpy(buf[ctr], dtlsseq, 8);
- } else {
- memcpy(buf[ctr], seq, 8);
- for (i = 7; i >= 0; i--) { /* increment */
- ++seq[i];
- if (seq[i] != 0)
- break;
- }
- }
-
- buf[ctr][8] = recs[ctr].type;
- buf[ctr][9] = (unsigned char)(s->version >> 8);
- buf[ctr][10] = (unsigned char)(s->version);
- buf[ctr][11] = (unsigned char)(recs[ctr].length >> 8);
- buf[ctr][12] = (unsigned char)(recs[ctr].length & 0xff);
- pad = EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_AEAD_TLS1_AAD,
- EVP_AEAD_TLS1_AAD_LEN, buf[ctr]);
- if (pad <= 0) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- if (sending) {
- reclen[ctr] += pad;
- recs[ctr].length += pad;
- }
-
- } else if ((bs != 1) && sending && !provided) {
- /*
- * We only do this for legacy ciphers. Provided ciphers add the
- * padding on the provider side.
- */
- padnum = bs - (reclen[ctr] % bs);
-
- /* Add weird padding of up to 256 bytes */
-
- if (padnum > MAX_PADDING) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
- return 0;
- }
- /* we need to add 'padnum' padding bytes of value padval */
- padval = (unsigned char)(padnum - 1);
- for (loop = reclen[ctr]; loop < reclen[ctr] + padnum; loop++)
- recs[ctr].input[loop] = padval;
- reclen[ctr] += padnum;
- recs[ctr].length += padnum;
- }
-
- if (!sending) {
- if (reclen[ctr] == 0 || reclen[ctr] % bs != 0) {
- /* Publicly invalid */
- return 0;
- }
- }
- }
- if (n_recs > 1) {
- unsigned char *data[SSL_MAX_PIPELINES];
-
- /* Set the output buffers */
- for (ctr = 0; ctr < n_recs; ctr++) {
- data[ctr] = recs[ctr].data;
- }
- if (EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS,
- (int)n_recs, data) <= 0) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_PIPELINE_FAILURE);
- return 0;
- }
- /* Set the input buffers */
- for (ctr = 0; ctr < n_recs; ctr++) {
- data[ctr] = recs[ctr].input;
- }
- if (EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_SET_PIPELINE_INPUT_BUFS,
- (int)n_recs, data) <= 0
- || EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_SET_PIPELINE_INPUT_LENS,
- (int)n_recs, reclen) <= 0) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_PIPELINE_FAILURE);
- return 0;
- }
- }
-
- if (!SSL_CONNECTION_IS_DTLS(s) && tlstree_enc) {
- unsigned char *seq;
- int decrement_seq = 0;
-
- /*
- * When sending, seq is incremented after MAC calculation.
- * So if we are in ETM mode, we use seq 'as is' in the ctrl-function.
- * Otherwise we have to decrease it in the implementation
- */
- if (sending && !SSL_WRITE_ETM(s))
- decrement_seq = 1;
-
- seq = sending ? RECORD_LAYER_get_write_sequence(&s->rlayer)
- : RECORD_LAYER_get_read_sequence(&s->rlayer);
- if (EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_TLSTREE, decrement_seq, seq) <= 0) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
- return 0;
- }
- }
-
- if (provided) {
- int outlen;
-
- /* Provided cipher - we do not support pipelining on this path */
- if (n_recs > 1) {
- SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
- return 0;
- }
-
- if (!EVP_CipherUpdate(ds, recs[0].data, &outlen, recs[0].input,
- (unsigned int)reclen[0]))
- return 0;
- recs[0].length = outlen;
-
- /*
- * The length returned from EVP_CipherUpdate above is the actual
- * payload length. We need to adjust the data/input ptr to skip over
- * any explicit IV
- */
- if (!sending) {
- if (EVP_CIPHER_get_mode(enc) == EVP_CIPH_GCM_MODE) {
- recs[0].data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
- recs[0].input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
- } else if (EVP_CIPHER_get_mode(enc) == EVP_CIPH_CCM_MODE) {
- recs[0].data += EVP_CCM_TLS_EXPLICIT_IV_LEN;
- recs[0].input += EVP_CCM_TLS_EXPLICIT_IV_LEN;
- } else if (bs != 1 && SSL_USE_EXPLICIT_IV(s)) {
- recs[0].data += bs;
- recs[0].input += bs;
- recs[0].orig_len -= bs;
- }
-
- /* Now get a pointer to the MAC (if applicable) */
- if (macs != NULL) {
- OSSL_PARAM params[2], *p = params;
-
- /* Get the MAC */
- macs[0].alloced = 0;
-
- *p++ = OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_TLS_MAC,
- (void **)&macs[0].mac,
- macsize);
- *p = OSSL_PARAM_construct_end();
-
- if (!EVP_CIPHER_CTX_get_params(ds, params)) {
- /* Shouldn't normally happen */
- SSLfatal(s, SSL_AD_INTERNAL_ERROR,
- ERR_R_INTERNAL_ERROR);
- return 0;
- }
- }
- }
- } else {
- /* Legacy cipher */
-
- tmpr = EVP_Cipher(ds, recs[0].data, recs[0].input,
- (unsigned int)reclen[0]);
- if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ds))
- & EVP_CIPH_FLAG_CUSTOM_CIPHER) != 0
- ? (tmpr < 0)
- : (tmpr == 0)) {
- /* AEAD can fail to verify MAC */
- return 0;
- }
-
- if (!sending) {
- for (ctr = 0; ctr < n_recs; ctr++) {
- /* Adjust the record to remove the explicit IV/MAC/Tag */
- if (EVP_CIPHER_get_mode(enc) == EVP_CIPH_GCM_MODE) {
- recs[ctr].data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
- recs[ctr].input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
- recs[ctr].length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
- } else if (EVP_CIPHER_get_mode(enc) == EVP_CIPH_CCM_MODE) {
- recs[ctr].data += EVP_CCM_TLS_EXPLICIT_IV_LEN;
- recs[ctr].input += EVP_CCM_TLS_EXPLICIT_IV_LEN;
- recs[ctr].length -= EVP_CCM_TLS_EXPLICIT_IV_LEN;
- } else if (bs != 1 && SSL_USE_EXPLICIT_IV(s)) {
- if (recs[ctr].length < bs)
- return 0;
- recs[ctr].data += bs;
- recs[ctr].input += bs;
- recs[ctr].length -= bs;
- recs[ctr].orig_len -= bs;
- }
-
- /*
- * If using Mac-then-encrypt, then this will succeed but
- * with a random MAC if padding is invalid
- */
- if (!tls1_cbc_remove_padding_and_mac(&recs[ctr].length,
- recs[ctr].orig_len,
- recs[ctr].data,
- (macs != NULL) ? &macs[ctr].mac : NULL,
- (macs != NULL) ? &macs[ctr].alloced
- : NULL,
- bs,
- pad ? (size_t)pad : macsize,
- (EVP_CIPHER_get_flags(enc)
- & EVP_CIPH_FLAG_AEAD_CIPHER) != 0,
- SSL_CONNECTION_GET_CTX(s)->libctx))
- return 0;
- }
- }
- }
- }
- return 1;
-}
-
-int n_ssl3_mac(SSL_CONNECTION *sc, SSL3_RECORD *rec, unsigned char *md,
- int sending)
-{
- unsigned char *mac_sec, *seq;
- const EVP_MD_CTX *hash;
- unsigned char *p, rec_char;
- size_t md_size;
- size_t npad;
- int t;
- unsigned int md_size_u;
- EVP_MD_CTX *md_ctx;
-
- /*
- * All read record layer operations should have been moved to the new
- * record layer code
- */
- assert(sending);
-
- mac_sec = &(sc->s3.write_mac_secret[0]);
- seq = RECORD_LAYER_get_write_sequence(&sc->rlayer);
- hash = sc->write_hash;
-
- t = EVP_MD_CTX_get_size(hash);
- if (t < 0)
- return 0;
- md_size = t;
- npad = (48 / md_size) * md_size;
-
- /* Chop the digest off the end :-) */
- md_ctx = EVP_MD_CTX_new();
-
- if (md_ctx == NULL)
- return 0;
-
- rec_char = rec->type;
- p = md;
- s2n(rec->length, p);
- if (EVP_MD_CTX_copy_ex(md_ctx, hash) <= 0
- || EVP_DigestUpdate(md_ctx, mac_sec, md_size) <= 0
- || EVP_DigestUpdate(md_ctx, ssl3_pad_1, npad) <= 0
- || EVP_DigestUpdate(md_ctx, seq, 8) <= 0
- || EVP_DigestUpdate(md_ctx, &rec_char, 1) <= 0
- || EVP_DigestUpdate(md_ctx, md, 2) <= 0
- || EVP_DigestUpdate(md_ctx, rec->input, rec->length) <= 0
- || EVP_DigestFinal_ex(md_ctx, md, NULL) <= 0
- || EVP_MD_CTX_copy_ex(md_ctx, hash) <= 0
- || EVP_DigestUpdate(md_ctx, mac_sec, md_size) <= 0
- || EVP_DigestUpdate(md_ctx, ssl3_pad_2, npad) <= 0
- || EVP_DigestUpdate(md_ctx, md, md_size) <= 0
- || EVP_DigestFinal_ex(md_ctx, md, &md_size_u) <= 0) {
- EVP_MD_CTX_free(md_ctx);
- return 0;
- }
-
- EVP_MD_CTX_free(md_ctx);
-
- ssl3_record_sequence_update(seq);
- return 1;
-}
-
-int tls1_mac_old(SSL_CONNECTION *sc, SSL3_RECORD *rec, unsigned char *md,
- int sending)
-{
- unsigned char *seq;
- EVP_MD_CTX *hash;
- size_t md_size;
- int i;
- EVP_MD_CTX *hmac = NULL, *mac_ctx;
- unsigned char header[13];
- int stream_mac = sending ? (sc->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM)
- : (sc->mac_flags & SSL_MAC_FLAG_READ_MAC_STREAM);
- int tlstree_mac = sending ? (sc->mac_flags & SSL_MAC_FLAG_WRITE_MAC_TLSTREE)
- : (sc->mac_flags & SSL_MAC_FLAG_READ_MAC_TLSTREE);
- int t;
- int ret = 0;
-
- /*
- * All read record layer calls should have been moved to the new record
- * layer.
- */
- assert(sending);
-
- seq = RECORD_LAYER_get_write_sequence(&sc->rlayer);
- hash = sc->write_hash;
-
- t = EVP_MD_CTX_get_size(hash);
- if (!ossl_assert(t >= 0))
- return 0;
- md_size = t;
-
- /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
- if (stream_mac) {
- mac_ctx = hash;
- } else {
- hmac = EVP_MD_CTX_new();
- if (hmac == NULL || !EVP_MD_CTX_copy(hmac, hash)) {
- goto end;
- }
- mac_ctx = hmac;
- }
-
- if (!SSL_CONNECTION_IS_DTLS(sc) && tlstree_mac
- && EVP_MD_CTX_ctrl(mac_ctx, EVP_MD_CTRL_TLSTREE, 0, seq) <= 0) {
- goto end;
- }
-
- if (SSL_CONNECTION_IS_DTLS(sc)) {
- unsigned char dtlsseq[8], *p = dtlsseq;
-
- s2n(sending ? DTLS_RECORD_LAYER_get_w_epoch(&sc->rlayer) :
- DTLS_RECORD_LAYER_get_r_epoch(&sc->rlayer), p);
- memcpy(p, &seq[2], 6);
-
- memcpy(header, dtlsseq, 8);
- } else
- memcpy(header, seq, 8);
-
- header[8] = rec->type;
- header[9] = (unsigned char)(sc->version >> 8);
- header[10] = (unsigned char)(sc->version);
- header[11] = (unsigned char)(rec->length >> 8);
- header[12] = (unsigned char)(rec->length & 0xff);
-
- if (EVP_DigestSignUpdate(mac_ctx, header, sizeof(header)) <= 0
- || EVP_DigestSignUpdate(mac_ctx, rec->input, rec->length) <= 0
- || EVP_DigestSignFinal(mac_ctx, md, &md_size) <= 0) {
- goto end;
- }
-
- OSSL_TRACE_BEGIN(TLS) {
- BIO_printf(trc_out, "seq:\n");
- BIO_dump_indent(trc_out, seq, 8, 4);
- BIO_printf(trc_out, "rec:\n");
- BIO_dump_indent(trc_out, rec->data, rec->length, 4);
- } OSSL_TRACE_END(TLS);
-
- if (!SSL_CONNECTION_IS_DTLS(sc)) {
- for (i = 7; i >= 0; i--) {
- ++seq[i];
- if (seq[i] != 0)
- break;
- }
- }
- OSSL_TRACE_BEGIN(TLS) {
- BIO_printf(trc_out, "md:\n");
- BIO_dump_indent(trc_out, md, md_size, 4);
- } OSSL_TRACE_END(TLS);
- ret = 1;
- end:
- EVP_MD_CTX_free(hmac);
- return ret;
-}
projects / openssl.git / blobdiff