diff options
Diffstat (limited to 'openssl-1.1.0h/ssl/ssl_rsa.c')
| -rw-r--r-- | openssl-1.1.0h/ssl/ssl_rsa.c | 964 |
1 files changed, 964 insertions, 0 deletions
diff --git a/openssl-1.1.0h/ssl/ssl_rsa.c b/openssl-1.1.0h/ssl/ssl_rsa.c new file mode 100644 index 0000000..a94fb13 --- /dev/null +++ b/openssl-1.1.0h/ssl/ssl_rsa.c @@ -0,0 +1,964 @@ +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (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 <stdio.h> +#include "ssl_locl.h" +#include <openssl/bio.h> +#include <openssl/objects.h> +#include <openssl/evp.h> +#include <openssl/x509.h> +#include <openssl/pem.h> + +static int ssl_set_cert(CERT *c, X509 *x509); +static int ssl_set_pkey(CERT *c, EVP_PKEY *pkey); +int SSL_use_certificate(SSL *ssl, X509 *x) +{ + int rv; + if (x == NULL) { + SSLerr(SSL_F_SSL_USE_CERTIFICATE, ERR_R_PASSED_NULL_PARAMETER); + return (0); + } + rv = ssl_security_cert(ssl, NULL, x, 0, 1); + if (rv != 1) { + SSLerr(SSL_F_SSL_USE_CERTIFICATE, rv); + return 0; + } + + return (ssl_set_cert(ssl->cert, x)); +} + +int SSL_use_certificate_file(SSL *ssl, const char *file, int type) +{ + int j; + BIO *in; + int ret = 0; + X509 *x = NULL; + + in = BIO_new(BIO_s_file()); + if (in == NULL) { + SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, ERR_R_BUF_LIB); + goto end; + } + + if (BIO_read_filename(in, file) <= 0) { + SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, ERR_R_SYS_LIB); + goto end; + } + if (type == SSL_FILETYPE_ASN1) { + j = ERR_R_ASN1_LIB; + x = d2i_X509_bio(in, NULL); + } else if (type == SSL_FILETYPE_PEM) { + j = ERR_R_PEM_LIB; + x = PEM_read_bio_X509(in, NULL, ssl->default_passwd_callback, + ssl->default_passwd_callback_userdata); + } else { + SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, SSL_R_BAD_SSL_FILETYPE); + goto end; + } + + if (x == NULL) { + SSLerr(SSL_F_SSL_USE_CERTIFICATE_FILE, j); + goto end; + } + + ret = SSL_use_certificate(ssl, x); + end: + X509_free(x); + BIO_free(in); + return (ret); +} + +int SSL_use_certificate_ASN1(SSL *ssl, const unsigned char *d, int len) +{ + X509 *x; + int ret; + + x = d2i_X509(NULL, &d, (long)len); + if (x == NULL) { + SSLerr(SSL_F_SSL_USE_CERTIFICATE_ASN1, ERR_R_ASN1_LIB); + return (0); + } + + ret = SSL_use_certificate(ssl, x); + X509_free(x); + return (ret); +} + +#ifndef OPENSSL_NO_RSA +int SSL_use_RSAPrivateKey(SSL *ssl, RSA *rsa) +{ + EVP_PKEY *pkey; + int ret; + + if (rsa == NULL) { + SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER); + return (0); + } + if ((pkey = EVP_PKEY_new()) == NULL) { + SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY, ERR_R_EVP_LIB); + return (0); + } + + RSA_up_ref(rsa); + if (EVP_PKEY_assign_RSA(pkey, rsa) <= 0) { + RSA_free(rsa); + EVP_PKEY_free(pkey); + return 0; + } + + ret = ssl_set_pkey(ssl->cert, pkey); + EVP_PKEY_free(pkey); + return (ret); +} +#endif + +static int ssl_set_pkey(CERT *c, EVP_PKEY *pkey) +{ + int i; + i = ssl_cert_type(NULL, pkey); + if (i < 0) { + SSLerr(SSL_F_SSL_SET_PKEY, SSL_R_UNKNOWN_CERTIFICATE_TYPE); + return (0); + } + + if (c->pkeys[i].x509 != NULL) { + EVP_PKEY *pktmp; + pktmp = X509_get0_pubkey(c->pkeys[i].x509); + if (pktmp == NULL) { + SSLerr(SSL_F_SSL_SET_PKEY, ERR_R_MALLOC_FAILURE); + return 0; + } + /* + * The return code from EVP_PKEY_copy_parameters is deliberately + * ignored. Some EVP_PKEY types cannot do this. + */ + EVP_PKEY_copy_parameters(pktmp, pkey); + ERR_clear_error(); + +#ifndef OPENSSL_NO_RSA + /* + * Don't check the public/private key, this is mostly for smart + * cards. + */ + if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA + && RSA_flags(EVP_PKEY_get0_RSA(pkey)) & RSA_METHOD_FLAG_NO_CHECK) ; + else +#endif + if (!X509_check_private_key(c->pkeys[i].x509, pkey)) { + X509_free(c->pkeys[i].x509); + c->pkeys[i].x509 = NULL; + return 0; + } + } + + EVP_PKEY_free(c->pkeys[i].privatekey); + EVP_PKEY_up_ref(pkey); + c->pkeys[i].privatekey = pkey; + c->key = &(c->pkeys[i]); + return (1); +} + +#ifndef OPENSSL_NO_RSA +int SSL_use_RSAPrivateKey_file(SSL *ssl, const char *file, int type) +{ + int j, ret = 0; + BIO *in; + RSA *rsa = NULL; + + in = BIO_new(BIO_s_file()); + if (in == NULL) { + SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, ERR_R_BUF_LIB); + goto end; + } + + if (BIO_read_filename(in, file) <= 0) { + SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, ERR_R_SYS_LIB); + goto end; + } + if (type == SSL_FILETYPE_ASN1) { + j = ERR_R_ASN1_LIB; + rsa = d2i_RSAPrivateKey_bio(in, NULL); + } else if (type == SSL_FILETYPE_PEM) { + j = ERR_R_PEM_LIB; + rsa = PEM_read_bio_RSAPrivateKey(in, NULL, + ssl->default_passwd_callback, + ssl->default_passwd_callback_userdata); + } else { + SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE); + goto end; + } + if (rsa == NULL) { + SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_FILE, j); + goto end; + } + ret = SSL_use_RSAPrivateKey(ssl, rsa); + RSA_free(rsa); + end: + BIO_free(in); + return (ret); +} + +int SSL_use_RSAPrivateKey_ASN1(SSL *ssl, const unsigned char *d, long len) +{ + int ret; + const unsigned char *p; + RSA *rsa; + + p = d; + if ((rsa = d2i_RSAPrivateKey(NULL, &p, (long)len)) == NULL) { + SSLerr(SSL_F_SSL_USE_RSAPRIVATEKEY_ASN1, ERR_R_ASN1_LIB); + return (0); + } + + ret = SSL_use_RSAPrivateKey(ssl, rsa); + RSA_free(rsa); + return (ret); +} +#endif /* !OPENSSL_NO_RSA */ + +int SSL_use_PrivateKey(SSL *ssl, EVP_PKEY *pkey) +{ + int ret; + + if (pkey == NULL) { + SSLerr(SSL_F_SSL_USE_PRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER); + return (0); + } + ret = ssl_set_pkey(ssl->cert, pkey); + return (ret); +} + +int SSL_use_PrivateKey_file(SSL *ssl, const char *file, int type) +{ + int j, ret = 0; + BIO *in; + EVP_PKEY *pkey = NULL; + + in = BIO_new(BIO_s_file()); + if (in == NULL) { + SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, ERR_R_BUF_LIB); + goto end; + } + + if (BIO_read_filename(in, file) <= 0) { + SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, ERR_R_SYS_LIB); + goto end; + } + if (type == SSL_FILETYPE_PEM) { + j = ERR_R_PEM_LIB; + pkey = PEM_read_bio_PrivateKey(in, NULL, + ssl->default_passwd_callback, + ssl->default_passwd_callback_userdata); + } else if (type == SSL_FILETYPE_ASN1) { + j = ERR_R_ASN1_LIB; + pkey = d2i_PrivateKey_bio(in, NULL); + } else { + SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE); + goto end; + } + if (pkey == NULL) { + SSLerr(SSL_F_SSL_USE_PRIVATEKEY_FILE, j); + goto end; + } + ret = SSL_use_PrivateKey(ssl, pkey); + EVP_PKEY_free(pkey); + end: + BIO_free(in); + return (ret); +} + +int SSL_use_PrivateKey_ASN1(int type, SSL *ssl, const unsigned char *d, + long len) +{ + int ret; + const unsigned char *p; + EVP_PKEY *pkey; + + p = d; + if ((pkey = d2i_PrivateKey(type, NULL, &p, (long)len)) == NULL) { + SSLerr(SSL_F_SSL_USE_PRIVATEKEY_ASN1, ERR_R_ASN1_LIB); + return (0); + } + + ret = SSL_use_PrivateKey(ssl, pkey); + EVP_PKEY_free(pkey); + return (ret); +} + +int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x) +{ + int rv; + if (x == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE, ERR_R_PASSED_NULL_PARAMETER); + return (0); + } + rv = ssl_security_cert(NULL, ctx, x, 0, 1); + if (rv != 1) { + SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE, rv); + return 0; + } + return (ssl_set_cert(ctx->cert, x)); +} + +static int ssl_set_cert(CERT *c, X509 *x) +{ + EVP_PKEY *pkey; + int i; + + pkey = X509_get0_pubkey(x); + if (pkey == NULL) { + SSLerr(SSL_F_SSL_SET_CERT, SSL_R_X509_LIB); + return (0); + } + + i = ssl_cert_type(x, pkey); + if (i < 0) { + SSLerr(SSL_F_SSL_SET_CERT, SSL_R_UNKNOWN_CERTIFICATE_TYPE); + return 0; + } +#ifndef OPENSSL_NO_EC + if (i == SSL_PKEY_ECC && !EC_KEY_can_sign(EVP_PKEY_get0_EC_KEY(pkey))) { + SSLerr(SSL_F_SSL_SET_CERT, SSL_R_ECC_CERT_NOT_FOR_SIGNING); + return 0; + } +#endif + if (c->pkeys[i].privatekey != NULL) { + /* + * The return code from EVP_PKEY_copy_parameters is deliberately + * ignored. Some EVP_PKEY types cannot do this. + */ + EVP_PKEY_copy_parameters(pkey, c->pkeys[i].privatekey); + ERR_clear_error(); + +#ifndef OPENSSL_NO_RSA + /* + * Don't check the public/private key, this is mostly for smart + * cards. + */ + if (EVP_PKEY_id(c->pkeys[i].privatekey) == EVP_PKEY_RSA + && RSA_flags(EVP_PKEY_get0_RSA(c->pkeys[i].privatekey)) & + RSA_METHOD_FLAG_NO_CHECK) ; + else +#endif /* OPENSSL_NO_RSA */ + if (!X509_check_private_key(x, c->pkeys[i].privatekey)) { + /* + * don't fail for a cert/key mismatch, just free current private + * key (when switching to a different cert & key, first this + * function should be used, then ssl_set_pkey + */ + EVP_PKEY_free(c->pkeys[i].privatekey); + c->pkeys[i].privatekey = NULL; + /* clear error queue */ + ERR_clear_error(); + } + } + + X509_free(c->pkeys[i].x509); + X509_up_ref(x); + c->pkeys[i].x509 = x; + c->key = &(c->pkeys[i]); + + return 1; +} + +int SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file, int type) +{ + int j; + BIO *in; + int ret = 0; + X509 *x = NULL; + + in = BIO_new(BIO_s_file()); + if (in == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, ERR_R_BUF_LIB); + goto end; + } + + if (BIO_read_filename(in, file) <= 0) { + SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, ERR_R_SYS_LIB); + goto end; + } + if (type == SSL_FILETYPE_ASN1) { + j = ERR_R_ASN1_LIB; + x = d2i_X509_bio(in, NULL); + } else if (type == SSL_FILETYPE_PEM) { + j = ERR_R_PEM_LIB; + x = PEM_read_bio_X509(in, NULL, ctx->default_passwd_callback, + ctx->default_passwd_callback_userdata); + } else { + SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, SSL_R_BAD_SSL_FILETYPE); + goto end; + } + + if (x == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, j); + goto end; + } + + ret = SSL_CTX_use_certificate(ctx, x); + end: + X509_free(x); + BIO_free(in); + return (ret); +} + +int SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, int len, const unsigned char *d) +{ + X509 *x; + int ret; + + x = d2i_X509(NULL, &d, (long)len); + if (x == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_ASN1, ERR_R_ASN1_LIB); + return (0); + } + + ret = SSL_CTX_use_certificate(ctx, x); + X509_free(x); + return (ret); +} + +#ifndef OPENSSL_NO_RSA +int SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa) +{ + int ret; + EVP_PKEY *pkey; + + if (rsa == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER); + return (0); + } + if ((pkey = EVP_PKEY_new()) == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY, ERR_R_EVP_LIB); + return (0); + } + + RSA_up_ref(rsa); + if (EVP_PKEY_assign_RSA(pkey, rsa) <= 0) { + RSA_free(rsa); + EVP_PKEY_free(pkey); + return 0; + } + + ret = ssl_set_pkey(ctx->cert, pkey); + EVP_PKEY_free(pkey); + return (ret); +} + +int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, const char *file, int type) +{ + int j, ret = 0; + BIO *in; + RSA *rsa = NULL; + + in = BIO_new(BIO_s_file()); + if (in == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, ERR_R_BUF_LIB); + goto end; + } + + if (BIO_read_filename(in, file) <= 0) { + SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, ERR_R_SYS_LIB); + goto end; + } + if (type == SSL_FILETYPE_ASN1) { + j = ERR_R_ASN1_LIB; + rsa = d2i_RSAPrivateKey_bio(in, NULL); + } else if (type == SSL_FILETYPE_PEM) { + j = ERR_R_PEM_LIB; + rsa = PEM_read_bio_RSAPrivateKey(in, NULL, + ctx->default_passwd_callback, + ctx->default_passwd_callback_userdata); + } else { + SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE); + goto end; + } + if (rsa == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE, j); + goto end; + } + ret = SSL_CTX_use_RSAPrivateKey(ctx, rsa); + RSA_free(rsa); + end: + BIO_free(in); + return (ret); +} + +int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, const unsigned char *d, + long len) +{ + int ret; + const unsigned char *p; + RSA *rsa; + + p = d; + if ((rsa = d2i_RSAPrivateKey(NULL, &p, (long)len)) == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_ASN1, ERR_R_ASN1_LIB); + return (0); + } + + ret = SSL_CTX_use_RSAPrivateKey(ctx, rsa); + RSA_free(rsa); + return (ret); +} +#endif /* !OPENSSL_NO_RSA */ + +int SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey) +{ + if (pkey == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER); + return (0); + } + return (ssl_set_pkey(ctx->cert, pkey)); +} + +int SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file, int type) +{ + int j, ret = 0; + BIO *in; + EVP_PKEY *pkey = NULL; + + in = BIO_new(BIO_s_file()); + if (in == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, ERR_R_BUF_LIB); + goto end; + } + + if (BIO_read_filename(in, file) <= 0) { + SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, ERR_R_SYS_LIB); + goto end; + } + if (type == SSL_FILETYPE_PEM) { + j = ERR_R_PEM_LIB; + pkey = PEM_read_bio_PrivateKey(in, NULL, + ctx->default_passwd_callback, + ctx->default_passwd_callback_userdata); + } else if (type == SSL_FILETYPE_ASN1) { + j = ERR_R_ASN1_LIB; + pkey = d2i_PrivateKey_bio(in, NULL); + } else { + SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, SSL_R_BAD_SSL_FILETYPE); + goto end; + } + if (pkey == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE, j); + goto end; + } + ret = SSL_CTX_use_PrivateKey(ctx, pkey); + EVP_PKEY_free(pkey); + end: + BIO_free(in); + return (ret); +} + +int SSL_CTX_use_PrivateKey_ASN1(int type, SSL_CTX *ctx, + const unsigned char *d, long len) +{ + int ret; + const unsigned char *p; + EVP_PKEY *pkey; + + p = d; + if ((pkey = d2i_PrivateKey(type, NULL, &p, (long)len)) == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_PRIVATEKEY_ASN1, ERR_R_ASN1_LIB); + return (0); + } + + ret = SSL_CTX_use_PrivateKey(ctx, pkey); + EVP_PKEY_free(pkey); + return (ret); +} + +/* + * Read a file that contains our certificate in "PEM" format, possibly + * followed by a sequence of CA certificates that should be sent to the peer + * in the Certificate message. + */ +static int use_certificate_chain_file(SSL_CTX *ctx, SSL *ssl, const char *file) +{ + BIO *in; + int ret = 0; + X509 *x = NULL; + pem_password_cb *passwd_callback; + void *passwd_callback_userdata; + + ERR_clear_error(); /* clear error stack for + * SSL_CTX_use_certificate() */ + + if (ctx != NULL) { + passwd_callback = ctx->default_passwd_callback; + passwd_callback_userdata = ctx->default_passwd_callback_userdata; + } else { + passwd_callback = ssl->default_passwd_callback; + passwd_callback_userdata = ssl->default_passwd_callback_userdata; + } + + in = BIO_new(BIO_s_file()); + if (in == NULL) { + SSLerr(SSL_F_USE_CERTIFICATE_CHAIN_FILE, ERR_R_BUF_LIB); + goto end; + } + + if (BIO_read_filename(in, file) <= 0) { + SSLerr(SSL_F_USE_CERTIFICATE_CHAIN_FILE, ERR_R_SYS_LIB); + goto end; + } + + x = PEM_read_bio_X509_AUX(in, NULL, passwd_callback, + passwd_callback_userdata); + if (x == NULL) { + SSLerr(SSL_F_USE_CERTIFICATE_CHAIN_FILE, ERR_R_PEM_LIB); + goto end; + } + + if (ctx) + ret = SSL_CTX_use_certificate(ctx, x); + else + ret = SSL_use_certificate(ssl, x); + + if (ERR_peek_error() != 0) + ret = 0; /* Key/certificate mismatch doesn't imply + * ret==0 ... */ + if (ret) { + /* + * If we could set up our certificate, now proceed to the CA + * certificates. + */ + X509 *ca; + int r; + unsigned long err; + + if (ctx) + r = SSL_CTX_clear_chain_certs(ctx); + else + r = SSL_clear_chain_certs(ssl); + + if (r == 0) { + ret = 0; + goto end; + } + + while ((ca = PEM_read_bio_X509(in, NULL, passwd_callback, + passwd_callback_userdata)) + != NULL) { + if (ctx) + r = SSL_CTX_add0_chain_cert(ctx, ca); + else + r = SSL_add0_chain_cert(ssl, ca); + /* + * Note that we must not free ca if it was successfully added to + * the chain (while we must free the main certificate, since its + * reference count is increased by SSL_CTX_use_certificate). + */ + if (!r) { + X509_free(ca); + ret = 0; + goto end; + } + } + /* When the while loop ends, it's usually just EOF. */ + err = ERR_peek_last_error(); + if (ERR_GET_LIB(err) == ERR_LIB_PEM + && ERR_GET_REASON(err) == PEM_R_NO_START_LINE) + ERR_clear_error(); + else + ret = 0; /* some real error */ + } + + end: + X509_free(x); + BIO_free(in); + return (ret); +} + +int SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx, const char *file) +{ + return use_certificate_chain_file(ctx, NULL, file); +} + +int SSL_use_certificate_chain_file(SSL *ssl, const char *file) +{ + return use_certificate_chain_file(NULL, ssl, file); +} + +static int serverinfo_find_extension(const unsigned char *serverinfo, + size_t serverinfo_length, + unsigned int extension_type, + const unsigned char **extension_data, + size_t *extension_length) +{ + *extension_data = NULL; + *extension_length = 0; + if (serverinfo == NULL || serverinfo_length == 0) + return -1; + for (;;) { + unsigned int type = 0; + size_t len = 0; + + /* end of serverinfo */ + if (serverinfo_length == 0) + return 0; /* Extension not found */ + + /* read 2-byte type field */ + if (serverinfo_length < 2) + return -1; /* Error */ + type = (serverinfo[0] << 8) + serverinfo[1]; + serverinfo += 2; + serverinfo_length -= 2; + + /* read 2-byte len field */ + if (serverinfo_length < 2) + return -1; /* Error */ + len = (serverinfo[0] << 8) + serverinfo[1]; + serverinfo += 2; + serverinfo_length -= 2; + + if (len > serverinfo_length) + return -1; /* Error */ + + if (type == extension_type) { + *extension_data = serverinfo; + *extension_length = len; + return 1; /* Success */ + } + + serverinfo += len; + serverinfo_length -= len; + } + /* Unreachable */ +} + +static int serverinfo_srv_parse_cb(SSL *s, unsigned int ext_type, + const unsigned char *in, + size_t inlen, int *al, void *arg) +{ + + if (inlen != 0) { + *al = SSL_AD_DECODE_ERROR; + return 0; + } + + return 1; +} + +static int serverinfo_srv_add_cb(SSL *s, unsigned int ext_type, + const unsigned char **out, size_t *outlen, + int *al, void *arg) +{ + const unsigned char *serverinfo = NULL; + size_t serverinfo_length = 0; + + /* Is there serverinfo data for the chosen server cert? */ + if ((ssl_get_server_cert_serverinfo(s, &serverinfo, + &serverinfo_length)) != 0) { + /* Find the relevant extension from the serverinfo */ + int retval = serverinfo_find_extension(serverinfo, serverinfo_length, + ext_type, out, outlen); + if (retval == -1) { + *al = SSL_AD_DECODE_ERROR; + return -1; /* Error */ + } + if (retval == 0) + return 0; /* No extension found, don't send extension */ + return 1; /* Send extension */ + } + return 0; /* No serverinfo data found, don't send + * extension */ +} + +/* + * With a NULL context, this function just checks that the serverinfo data + * parses correctly. With a non-NULL context, it registers callbacks for + * the included extensions. + */ +static int serverinfo_process_buffer(const unsigned char *serverinfo, + size_t serverinfo_length, SSL_CTX *ctx) +{ + if (serverinfo == NULL || serverinfo_length == 0) + return 0; + for (;;) { + unsigned int ext_type = 0; + size_t len = 0; + + /* end of serverinfo */ + if (serverinfo_length == 0) + return 1; + + /* read 2-byte type field */ + if (serverinfo_length < 2) + return 0; + /* FIXME: check for types we understand explicitly? */ + + /* Register callbacks for extensions */ + ext_type = (serverinfo[0] << 8) + serverinfo[1]; + if (ctx) { + int have_ext_cbs = 0; + size_t i; + custom_ext_methods *exts = &ctx->cert->srv_ext; + custom_ext_method *meth = exts->meths; + + for (i = 0; i < exts->meths_count; i++, meth++) { + if (ext_type == meth->ext_type) { + have_ext_cbs = 1; + break; + } + } + + if (!have_ext_cbs && !SSL_CTX_add_server_custom_ext(ctx, ext_type, + serverinfo_srv_add_cb, + NULL, NULL, + serverinfo_srv_parse_cb, + NULL)) + return 0; + } + + serverinfo += 2; + serverinfo_length -= 2; + + /* read 2-byte len field */ + if (serverinfo_length < 2) + return 0; + len = (serverinfo[0] << 8) + serverinfo[1]; + serverinfo += 2; + serverinfo_length -= 2; + + if (len > serverinfo_length) + return 0; + + serverinfo += len; + serverinfo_length -= len; + } +} + +int SSL_CTX_use_serverinfo(SSL_CTX *ctx, const unsigned char *serverinfo, + size_t serverinfo_length) +{ + unsigned char *new_serverinfo; + + if (ctx == NULL || serverinfo == NULL || serverinfo_length == 0) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + if (!serverinfo_process_buffer(serverinfo, serverinfo_length, NULL)) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, SSL_R_INVALID_SERVERINFO_DATA); + return 0; + } + if (ctx->cert->key == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, ERR_R_INTERNAL_ERROR); + return 0; + } + new_serverinfo = OPENSSL_realloc(ctx->cert->key->serverinfo, + serverinfo_length); + if (new_serverinfo == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, ERR_R_MALLOC_FAILURE); + return 0; + } + ctx->cert->key->serverinfo = new_serverinfo; + memcpy(ctx->cert->key->serverinfo, serverinfo, serverinfo_length); + ctx->cert->key->serverinfo_length = serverinfo_length; + + /* + * Now that the serverinfo is validated and stored, go ahead and + * register callbacks. + */ + if (!serverinfo_process_buffer(serverinfo, serverinfo_length, ctx)) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO, SSL_R_INVALID_SERVERINFO_DATA); + return 0; + } + return 1; +} + +int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file) +{ + unsigned char *serverinfo = NULL; + unsigned char *tmp; + size_t serverinfo_length = 0; + unsigned char *extension = 0; + long extension_length = 0; + char *name = NULL; + char *header = NULL; + char namePrefix[] = "SERVERINFO FOR "; + int ret = 0; + BIO *bin = NULL; + size_t num_extensions = 0; + + if (ctx == NULL || file == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_PASSED_NULL_PARAMETER); + goto end; + } + + bin = BIO_new(BIO_s_file()); + if (bin == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_BUF_LIB); + goto end; + } + if (BIO_read_filename(bin, file) <= 0) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_SYS_LIB); + goto end; + } + + for (num_extensions = 0;; num_extensions++) { + if (PEM_read_bio(bin, &name, &header, &extension, &extension_length) + == 0) { + /* + * There must be at least one extension in this file + */ + if (num_extensions == 0) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, + SSL_R_NO_PEM_EXTENSIONS); + goto end; + } else /* End of file, we're done */ + break; + } + /* Check that PEM name starts with "BEGIN SERVERINFO FOR " */ + if (strlen(name) < strlen(namePrefix)) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, SSL_R_PEM_NAME_TOO_SHORT); + goto end; + } + if (strncmp(name, namePrefix, strlen(namePrefix)) != 0) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, + SSL_R_PEM_NAME_BAD_PREFIX); + goto end; + } + /* + * Check that the decoded PEM data is plausible (valid length field) + */ + if (extension_length < 4 + || (extension[2] << 8) + extension[3] != extension_length - 4) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, SSL_R_BAD_DATA); + goto end; + } + /* Append the decoded extension to the serverinfo buffer */ + tmp = OPENSSL_realloc(serverinfo, serverinfo_length + extension_length); + if (tmp == NULL) { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_MALLOC_FAILURE); + goto end; + } + serverinfo = tmp; + memcpy(serverinfo + serverinfo_length, extension, extension_length); + serverinfo_length += extension_length; + + OPENSSL_free(name); + name = NULL; + OPENSSL_free(header); + header = NULL; + OPENSSL_free(extension); + extension = NULL; + } + + ret = SSL_CTX_use_serverinfo(ctx, serverinfo, serverinfo_length); + end: + /* SSL_CTX_use_serverinfo makes a local copy of the serverinfo. */ + OPENSSL_free(name); + OPENSSL_free(header); + OPENSSL_free(extension); + OPENSSL_free(serverinfo); + BIO_free(bin); + return ret; +} |