diff options
Diffstat (limited to 'src/libgit2/streams/openssl_dynamic.c')
| -rw-r--r-- | src/libgit2/streams/openssl_dynamic.c | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/src/libgit2/streams/openssl_dynamic.c b/src/libgit2/streams/openssl_dynamic.c new file mode 100644 index 000000000..da16b6ed7 --- /dev/null +++ b/src/libgit2/streams/openssl_dynamic.c @@ -0,0 +1,309 @@ +/* + * Copyright (C) the libgit2 contributors. All rights reserved. + * + * This file is part of libgit2, distributed under the GNU GPL v2 with + * a Linking Exception. For full terms see the included COPYING file. + */ + +#include "streams/openssl.h" +#include "streams/openssl_dynamic.h" + +#if defined(GIT_OPENSSL) && defined(GIT_OPENSSL_DYNAMIC) + +#include "runtime.h" + +#include <dlfcn.h> + +unsigned char *(*ASN1_STRING_data)(ASN1_STRING *x); +const unsigned char *(*ASN1_STRING_get0_data)(const ASN1_STRING *x); +int (*ASN1_STRING_length)(const ASN1_STRING *x); +int (*ASN1_STRING_to_UTF8)(unsigned char **out, const ASN1_STRING *in); +int (*ASN1_STRING_type)(const ASN1_STRING *x); + +void *(*BIO_get_data)(BIO *a); +int (*BIO_get_new_index)(void); +int (*OPENSSL_init_ssl)(uint64_t opts, const void *settings); +void (*BIO_meth_free)(BIO_METHOD *biom); +int (*BIO_meth_set_create)(BIO_METHOD *biom, int (*create) (BIO *)); +int (*BIO_meth_set_ctrl)(BIO_METHOD *biom, long (*ctrl) (BIO *, int, long, void *)); +int (*BIO_meth_set_destroy)(BIO_METHOD *biom, int (*destroy) (BIO *)); +int (*BIO_meth_set_gets)(BIO_METHOD *biom, int (*gets) (BIO *, char *, int)); +int (*BIO_meth_set_puts)(BIO_METHOD *biom, int (*puts) (BIO *, const char *)); +int (*BIO_meth_set_read)(BIO_METHOD *biom, int (*read) (BIO *, char *, int)); +int (*BIO_meth_set_write)(BIO_METHOD *biom, int (*write) (BIO *, const char *, int)); +BIO_METHOD *(*BIO_meth_new)(int type, const char *name); +BIO *(*BIO_new)(const BIO_METHOD *type); +void (*BIO_set_data)(BIO *a, void *ptr); +void (*BIO_set_init)(BIO *a, int init); + +void (*CRYPTO_free)(void *ptr, const char *file, int line); +void *(*CRYPTO_malloc)(size_t num, const char *file, int line); +int (*CRYPTO_num_locks)(void); +void (*CRYPTO_set_locking_callback)(void (*func)(int mode, int type, const char *file, int line)); +int (*CRYPTO_set_mem_functions)(void *(*m)(size_t bytes), void *(*r)(void *mem, size_t size), void (*f)(void *mem)); +int (*CRYPTO_THREADID_set_callback)(void (*func)(CRYPTO_THREADID *id)); +void (*CRYPTO_THREADID_set_numeric)(CRYPTO_THREADID *id, unsigned long val); + +char *(*ERR_error_string)(unsigned long e, char *buf); +void (*ERR_error_string_n)(unsigned long e, char *buf, size_t len); +unsigned long (*ERR_get_error)(void); + +int (*SSL_connect)(SSL *ssl); +long (*SSL_ctrl)(SSL *ssl, int cmd, long arg, void *parg); +void (*SSL_free)(SSL *ssl); +int (*SSL_get_error)(SSL *ssl, int ret); +X509 *(*SSL_get_peer_certificate)(const SSL *ssl); +long (*SSL_get_verify_result)(const SSL *ssl); +int (*SSL_library_init)(void); +void (*SSL_load_error_strings)(void); +SSL *(*SSL_new)(SSL_CTX *ctx); +int (*SSL_read)(SSL *ssl, const void *buf, int num); +void (*SSL_set_bio)(SSL *ssl, BIO *rbio, BIO *wbio); +int (*SSL_shutdown)(SSL *ssl); +int (*SSL_write)(SSL *ssl, const void *buf, int num); + +long (*SSL_CTX_ctrl)(SSL_CTX *ctx, int cmd, long larg, void *parg); +void (*SSL_CTX_free)(SSL_CTX *ctx); +SSL_CTX *(*SSL_CTX_new)(const SSL_METHOD *method); +int (*SSL_CTX_set_cipher_list)(SSL_CTX *ctx, const char *str); +int (*SSL_CTX_set_default_verify_paths)(SSL_CTX *ctx); +long (*SSL_CTX_set_options)(SSL_CTX *ctx, long options); +void (*SSL_CTX_set_verify)(SSL_CTX *ctx, int mode, int (*verify_callback)(int, X509_STORE_CTX *)); +int (*SSL_CTX_load_verify_locations)(SSL_CTX *ctx, const char *CAfile, const char *CApath); + +const SSL_METHOD *(*SSLv23_method)(void); +const SSL_METHOD *(*TLS_method)(void); + +ASN1_STRING *(*X509_NAME_ENTRY_get_data)(const X509_NAME_ENTRY *ne); +X509_NAME_ENTRY *(*X509_NAME_get_entry)(X509_NAME *name, int loc); +int (*X509_NAME_get_index_by_NID)(X509_NAME *name, int nid, int lastpos); +void (*X509_free)(X509 *a); +void *(*X509_get_ext_d2i)(const X509 *x, int nid, int *crit, int *idx); +X509_NAME *(*X509_get_subject_name)(const X509 *x); + +int (*i2d_X509)(X509 *a, unsigned char **ppout); + +int (*OPENSSL_sk_num)(const void *sk); +void *(*OPENSSL_sk_value)(const void *sk, int i); +void (*OPENSSL_sk_free)(void *sk); + +int (*sk_num)(const void *sk); +void *(*sk_value)(const void *sk, int i); +void (*sk_free)(void *sk); + +void *openssl_handle; + +GIT_INLINE(void *) openssl_sym(int *err, const char *name, bool required) +{ + void *symbol; + + /* if we've seen an err, noop to retain it */ + if (*err) + return NULL; + + + if ((symbol = dlsym(openssl_handle, name)) == NULL && required) { + const char *msg = dlerror(); + git_error_set(GIT_ERROR_SSL, "could not load ssl function '%s': %s", name, msg ? msg : "unknown error"); + *err = -1; + } + + return symbol; +} + +static void dynamic_shutdown(void) +{ + dlclose(openssl_handle); + openssl_handle = NULL; +} + +int git_openssl_stream_dynamic_init(void) +{ + int err = 0; + + if ((openssl_handle = dlopen("libssl.so.1.1", RTLD_NOW)) == NULL && + (openssl_handle = dlopen("libssl.1.1.dylib", RTLD_NOW)) == NULL && + (openssl_handle = dlopen("libssl.so.1.0.0", RTLD_NOW)) == NULL && + (openssl_handle = dlopen("libssl.1.0.0.dylib", RTLD_NOW)) == NULL && + (openssl_handle = dlopen("libssl.so.10", RTLD_NOW)) == NULL) { + git_error_set(GIT_ERROR_SSL, "could not load ssl libraries"); + return -1; + } + + ASN1_STRING_data = (unsigned char *(*)(ASN1_STRING *x))openssl_sym(&err, "ASN1_STRING_data", false); + ASN1_STRING_get0_data = (const unsigned char *(*)(const ASN1_STRING *x))openssl_sym(&err, "ASN1_STRING_get0_data", false); + ASN1_STRING_length = (int (*)(const ASN1_STRING *))openssl_sym(&err, "ASN1_STRING_length", true); + ASN1_STRING_to_UTF8 = (int (*)(unsigned char **, const ASN1_STRING *))openssl_sym(&err, "ASN1_STRING_to_UTF8", true); + ASN1_STRING_type = (int (*)(const ASN1_STRING *))openssl_sym(&err, "ASN1_STRING_type", true); + + BIO_get_data = (void *(*)(BIO *))openssl_sym(&err, "BIO_get_data", false); + BIO_get_new_index = (int (*)(void))openssl_sym(&err, "BIO_get_new_index", false); + BIO_meth_free = (void (*)(BIO_METHOD *))openssl_sym(&err, "BIO_meth_free", false); + BIO_meth_new = (BIO_METHOD *(*)(int, const char *))openssl_sym(&err, "BIO_meth_new", false); + BIO_meth_set_create = (int (*)(BIO_METHOD *, int (*)(BIO *)))openssl_sym(&err, "BIO_meth_set_create", false); + BIO_meth_set_ctrl = (int (*)(BIO_METHOD *, long (*)(BIO *, int, long, void *)))openssl_sym(&err, "BIO_meth_set_ctrl", false); + BIO_meth_set_destroy = (int (*)(BIO_METHOD *, int (*)(BIO *)))openssl_sym(&err, "BIO_meth_set_destroy", false); + BIO_meth_set_gets = (int (*)(BIO_METHOD *, int (*)(BIO *, char *, int)))openssl_sym(&err, "BIO_meth_set_gets", false); + BIO_meth_set_puts = (int (*)(BIO_METHOD *, int (*)(BIO *, const char *)))openssl_sym(&err, "BIO_meth_set_puts", false); + BIO_meth_set_read = (int (*)(BIO_METHOD *, int (*)(BIO *, char *, int)))openssl_sym(&err, "BIO_meth_set_read", false); + BIO_meth_set_write = (int (*)(BIO_METHOD *, int (*)(BIO *, const char *, int)))openssl_sym(&err, "BIO_meth_set_write", false); + BIO_new = (BIO *(*)(const BIO_METHOD *))openssl_sym(&err, "BIO_new", true); + BIO_set_data = (void (*)(BIO *a, void *))openssl_sym(&err, "BIO_set_data", false); + BIO_set_init = (void (*)(BIO *a, int))openssl_sym(&err, "BIO_set_init", false); + + CRYPTO_free = (void (*)(void *, const char *, int))openssl_sym(&err, "CRYPTO_free", true); + CRYPTO_malloc = (void *(*)(size_t, const char *, int))openssl_sym(&err, "CRYPTO_malloc", true); + CRYPTO_num_locks = (int (*)(void))openssl_sym(&err, "CRYPTO_num_locks", false); + CRYPTO_set_locking_callback = (void (*)(void (*)(int, int, const char *, int)))openssl_sym(&err, "CRYPTO_set_locking_callback", false); + CRYPTO_set_mem_functions = (int (*)(void *(*)(size_t), void *(*)(void *, size_t), void (*f)(void *)))openssl_sym(&err, "CRYPTO_set_mem_functions", true); + + CRYPTO_THREADID_set_callback = (int (*)(void (*)(CRYPTO_THREADID *)))openssl_sym(&err, "CRYPTO_THREADID_set_callback", false); + CRYPTO_THREADID_set_numeric = (void (*)(CRYPTO_THREADID *, unsigned long))openssl_sym(&err, "CRYPTO_THREADID_set_numeric", false); + + ERR_error_string = (char *(*)(unsigned long, char *))openssl_sym(&err, "ERR_error_string", true); + ERR_error_string_n = (void (*)(unsigned long, char *, size_t))openssl_sym(&err, "ERR_error_string_n", true); + ERR_get_error = (unsigned long (*)(void))openssl_sym(&err, "ERR_get_error", true); + + OPENSSL_init_ssl = (int (*)(uint64_t opts, const void *settings))openssl_sym(&err, "OPENSSL_init_ssl", false); + OPENSSL_sk_num = (int (*)(const void *))openssl_sym(&err, "OPENSSL_sk_num", false); + OPENSSL_sk_value = (void *(*)(const void *sk, int i))openssl_sym(&err, "OPENSSL_sk_value", false); + OPENSSL_sk_free = (void (*)(void *))openssl_sym(&err, "OPENSSL_sk_free", false); + + sk_num = (int (*)(const void *))openssl_sym(&err, "sk_num", false); + sk_value = (void *(*)(const void *sk, int i))openssl_sym(&err, "sk_value", false); + sk_free = (void (*)(void *))openssl_sym(&err, "sk_free", false); + + SSL_connect = (int (*)(SSL *))openssl_sym(&err, "SSL_connect", true); + SSL_ctrl = (long (*)(SSL *, int, long, void *))openssl_sym(&err, "SSL_ctrl", true); + SSL_get_peer_certificate = (X509 *(*)(const SSL *))openssl_sym(&err, "SSL_get_peer_certificate", true); + SSL_library_init = (int (*)(void))openssl_sym(&err, "SSL_library_init", false); + SSL_free = (void (*)(SSL *))openssl_sym(&err, "SSL_free", true); + SSL_get_error = (int (*)(SSL *, int))openssl_sym(&err, "SSL_get_error", true); + SSL_get_verify_result = (long (*)(const SSL *ssl))openssl_sym(&err, "SSL_get_verify_result", true); + SSL_load_error_strings = (void (*)(void))openssl_sym(&err, "SSL_load_error_strings", false); + SSL_new = (SSL *(*)(SSL_CTX *))openssl_sym(&err, "SSL_new", true); + SSL_read = (int (*)(SSL *, const void *, int))openssl_sym(&err, "SSL_read", true); + SSL_set_bio = (void (*)(SSL *, BIO *, BIO *))openssl_sym(&err, "SSL_set_bio", true); + SSL_shutdown = (int (*)(SSL *ssl))openssl_sym(&err, "SSL_shutdown", true); + SSL_write = (int (*)(SSL *, const void *, int))openssl_sym(&err, "SSL_write", true); + + SSL_CTX_ctrl = (long (*)(SSL_CTX *, int, long, void *))openssl_sym(&err, "SSL_CTX_ctrl", true); + SSL_CTX_free = (void (*)(SSL_CTX *))openssl_sym(&err, "SSL_CTX_free", true); + SSL_CTX_new = (SSL_CTX *(*)(const SSL_METHOD *))openssl_sym(&err, "SSL_CTX_new", true); + SSL_CTX_set_cipher_list = (int (*)(SSL_CTX *, const char *))openssl_sym(&err, "SSL_CTX_set_cipher_list", true); + SSL_CTX_set_default_verify_paths = (int (*)(SSL_CTX *ctx))openssl_sym(&err, "SSL_CTX_set_default_verify_paths", true); + SSL_CTX_set_options = (long (*)(SSL_CTX *, long))openssl_sym(&err, "SSL_CTX_set_options", false); + SSL_CTX_set_verify = (void (*)(SSL_CTX *, int, int (*)(int, X509_STORE_CTX *)))openssl_sym(&err, "SSL_CTX_set_verify", true); + SSL_CTX_load_verify_locations = (int (*)(SSL_CTX *, const char *, const char *))openssl_sym(&err, "SSL_CTX_load_verify_locations", true); + + SSLv23_method = (const SSL_METHOD *(*)(void))openssl_sym(&err, "SSLv23_method", false); + TLS_method = (const SSL_METHOD *(*)(void))openssl_sym(&err, "TLS_method", false); + + X509_NAME_ENTRY_get_data = (ASN1_STRING *(*)(const X509_NAME_ENTRY *))openssl_sym(&err, "X509_NAME_ENTRY_get_data", true); + X509_NAME_get_entry = (X509_NAME_ENTRY *(*)(X509_NAME *, int))openssl_sym(&err, "X509_NAME_get_entry", true); + X509_NAME_get_index_by_NID = (int (*)(X509_NAME *, int, int))openssl_sym(&err, "X509_NAME_get_index_by_NID", true); + X509_free = (void (*)(X509 *))openssl_sym(&err, "X509_free", true); + X509_get_ext_d2i = (void *(*)(const X509 *x, int nid, int *crit, int *idx))openssl_sym(&err, "X509_get_ext_d2i", true); + X509_get_subject_name = (X509_NAME *(*)(const X509 *))openssl_sym(&err, "X509_get_subject_name", true); + + i2d_X509 = (int (*)(X509 *a, unsigned char **ppout))openssl_sym(&err, "i2d_X509", true); + + if (err) + goto on_error; + + /* Add legacy functionality */ + if (!OPENSSL_init_ssl) { + OPENSSL_init_ssl = OPENSSL_init_ssl__legacy; + + if (!SSL_library_init || + !SSL_load_error_strings || + !CRYPTO_num_locks || + !CRYPTO_set_locking_callback || + !CRYPTO_THREADID_set_callback || + !CRYPTO_THREADID_set_numeric) { + git_error_set(GIT_ERROR_SSL, "could not load legacy openssl initialization functions"); + goto on_error; + } + } + + if (!SSL_CTX_set_options) + SSL_CTX_set_options = SSL_CTX_set_options__legacy; + + if (TLS_method) + SSLv23_method = TLS_method; + + if (!BIO_meth_new) { + BIO_meth_new = BIO_meth_new__legacy; + BIO_meth_new = BIO_meth_new__legacy; + BIO_meth_free = BIO_meth_free__legacy; + BIO_meth_set_write = BIO_meth_set_write__legacy; + BIO_meth_set_read = BIO_meth_set_read__legacy; + BIO_meth_set_puts = BIO_meth_set_puts__legacy; + BIO_meth_set_gets = BIO_meth_set_gets__legacy; + BIO_meth_set_ctrl = BIO_meth_set_ctrl__legacy; + BIO_meth_set_create = BIO_meth_set_create__legacy; + BIO_meth_set_destroy = BIO_meth_set_destroy__legacy; + BIO_get_new_index = BIO_get_new_index__legacy; + BIO_set_data = BIO_set_data__legacy; + BIO_set_init = BIO_set_init__legacy; + BIO_get_data = BIO_get_data__legacy; + } + + if (!ASN1_STRING_get0_data) { + if (!ASN1_STRING_data) { + git_error_set(GIT_ERROR_SSL, "could not load legacy openssl string function"); + goto on_error; + } + + ASN1_STRING_get0_data = ASN1_STRING_get0_data__legacy; + } + + if ((!OPENSSL_sk_num && !sk_num) || + (!OPENSSL_sk_value && !sk_value) || + (!OPENSSL_sk_free && !sk_free)) { + git_error_set(GIT_ERROR_SSL, "could not load legacy openssl stack functions"); + goto on_error; + } + + if (git_runtime_shutdown_register(dynamic_shutdown) != 0) + goto on_error; + + return 0; + +on_error: + dlclose(openssl_handle); + return -1; +} + + +int sk_GENERAL_NAME_num(const GENERAL_NAME *sk) +{ + if (OPENSSL_sk_num) + return OPENSSL_sk_num(sk); + else if (sk_num) + return sk_num(sk); + + GIT_ASSERT_WITH_RETVAL(false, 0); + return 0; +} + +GENERAL_NAME *sk_GENERAL_NAME_value(const GENERAL_NAME *sk, int i) +{ + if (OPENSSL_sk_value) + return OPENSSL_sk_value(sk, i); + else if (sk_value) + return sk_value(sk, i); + + GIT_ASSERT_WITH_RETVAL(false, NULL); + return NULL; +} + +void GENERAL_NAMES_free(GENERAL_NAME *sk) +{ + if (OPENSSL_sk_free) + OPENSSL_sk_free(sk); + else if (sk_free) + sk_free(sk); +} + +#endif /* GIT_OPENSSL && GIT_OPENSSL_DYNAMIC */ |