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Merge pull request #9421 from mfil/feature/implement_tls_exporter

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Implement TLS-Exporter
This commit is contained in:
David Horstmann
2025-04-17 14:47:13 +00:00
committed by GitHub
parent 8ab3d8c25d dba07e152e
commit 232da48471
14 changed files with 885 additions and 34 deletions
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48
programs/ssl/ssl_client2.c
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@@ -103,6 +103,8 @@ int main(void)
#define DFL_NSS_KEYLOG 0
#define DFL_NSS_KEYLOG_FILE NULL
#define DFL_SKIP_CLOSE_NOTIFY 0
#define DFL_EXP_LABEL NULL
#define DFL_EXP_LEN 20
#define DFL_QUERY_CONFIG_MODE 0
#define DFL_USE_SRTP 0
#define DFL_SRTP_FORCE_PROFILE 0
@@ -365,6 +367,16 @@ int main(void)
#define USAGE_TLS1_3_KEY_EXCHANGE_MODES ""
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
#if defined(MBEDTLS_SSL_KEYING_MATERIAL_EXPORT)
#define USAGE_EXPORT \
" exp_label=%%s Label to input into TLS-Exporter\n" \
" default: None (don't try to export a key)\n" \
" exp_len=%%d Length of key to extract from TLS-Exporter \n" \
" default: 20\n"
#else
#define USAGE_EXPORT ""
#endif /* defined(MBEDTLS_SSL_KEYING_MATERIAL_EXPORT) */
/* USAGE is arbitrarily split to stay under the portable string literal
* length limit: 4095 bytes in C99. */
#define USAGE1 \
@@ -454,6 +466,7 @@ int main(void)
" otherwise. The expansion of the macro\n" \
" is printed if it is defined\n" \
USAGE_SERIALIZATION \
USAGE_EXPORT \
"\n"
/*
@@ -540,6 +553,8 @@ struct options {
* after renegotiation */
int reproducible; /* make communication reproducible */
int skip_close_notify; /* skip sending the close_notify alert */
const char *exp_label; /* label to input into mbedtls_ssl_export_keying_material() */
int exp_len; /* Length of key to export using mbedtls_ssl_export_keying_material() */
#if defined(MBEDTLS_SSL_EARLY_DATA)
int early_data; /* early data enablement flag */
#endif
@@ -983,6 +998,8 @@ int main(int argc, char *argv[])
opt.nss_keylog = DFL_NSS_KEYLOG;
opt.nss_keylog_file = DFL_NSS_KEYLOG_FILE;
opt.skip_close_notify = DFL_SKIP_CLOSE_NOTIFY;
opt.exp_label = DFL_EXP_LABEL;
opt.exp_len = DFL_EXP_LEN;
opt.query_config_mode = DFL_QUERY_CONFIG_MODE;
opt.use_srtp = DFL_USE_SRTP;
opt.force_srtp_profile = DFL_SRTP_FORCE_PROFILE;
@@ -1429,6 +1446,10 @@ usage:
if (opt.skip_close_notify < 0 || opt.skip_close_notify > 1) {
goto usage;
}
} else if (strcmp(p, "exp_label") == 0) {
opt.exp_label = q;
} else if (strcmp(p, "exp_len") == 0) {
opt.exp_len = atoi(q);
} else if (strcmp(p, "use_srtp") == 0) {
opt.use_srtp = atoi(q);
} else if (strcmp(p, "srtp_force_profile") == 0) {
@@ -2516,6 +2537,33 @@ usage:
}
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
#if defined(MBEDTLS_SSL_KEYING_MATERIAL_EXPORT)
if (opt.exp_label != NULL && opt.exp_len > 0) {
unsigned char *exported_key = mbedtls_calloc((size_t) opt.exp_len, sizeof(unsigned char));
if (exported_key == NULL) {
mbedtls_printf("Could not allocate %d bytes\n", opt.exp_len);
ret = 3;
goto exit;
}
ret = mbedtls_ssl_export_keying_material(&ssl, exported_key, (size_t) opt.exp_len,
opt.exp_label, strlen(opt.exp_label),
NULL, 0, 0);
if (ret != 0) {
mbedtls_free(exported_key);
goto exit;
}
mbedtls_printf("Exporting key of length %d with label \"%s\": 0x",
opt.exp_len,
opt.exp_label);
for (i = 0; i < opt.exp_len; i++) {
mbedtls_printf("%02X", exported_key[i]);
}
mbedtls_printf("\n\n");
fflush(stdout);
mbedtls_free(exported_key);
}
#endif /* defined(MBEDTLS_SSL_KEYING_MATERIAL_EXPORT) */
/*
* 6. Write the GET request
*/