]>
Commit | Line | Data |
---|---|---|
79e259e3 | 1 | |
d5957691 MC |
2 | OPENSSL INSTALLATION |
3 | -------------------- | |
79e259e3 | 4 | |
ea24fe29 RL |
5 | This document describes installation on all supported operating |
6 | systems (the Linux/Unix family, OpenVMS and Windows) | |
4109b97c RE |
7 | |
8 | To install OpenSSL, you will need: | |
79e259e3 | 9 | |
07930a75 RL |
10 | * A make implementation |
11 | * Perl 5 with core modules (please read NOTES.PERL) | |
12 | * The perl module Text::Template (please read NOTES.PERL) | |
73bfb9ad | 13 | * an ANSI C compiler |
d5957691 | 14 | * a development environment in the form of development libraries and C |
d57d85ff | 15 | header files |
2acd8ec7 RL |
16 | * a supported operating system |
17 | ||
e8fd2a4c RL |
18 | For additional platform specific requirements, solutions to specific |
19 | issues and other details, please read one of these: | |
2acd8ec7 | 20 | |
45632ee3 | 21 | * NOTES.UNIX (any supported Unix like system) |
b32b8961 | 22 | * NOTES.VMS (OpenVMS) |
20ab55f4 | 23 | * NOTES.WIN (any supported Windows) |
07930a75 | 24 | * NOTES.DJGPP (DOS platform with DJGPP) |
79e259e3 | 25 | |
ea24fe29 RL |
26 | Notational conventions in this document |
27 | --------------------------------------- | |
28 | ||
29 | Throughout this document, we use the following conventions in command | |
30 | examples: | |
31 | ||
32 | $ command Any line starting with a dollar sign | |
33 | ($) is a command line. | |
34 | ||
35 | { word1 | word2 | word3 } This denotes a mandatory choice, to be | |
36 | replaced with one of the given words. | |
37 | A simple example would be this: | |
38 | ||
39 | $ echo { FOO | BAR | COOKIE } | |
40 | ||
41 | which is to be understood as one of | |
42 | these: | |
43 | ||
44 | $ echo FOO | |
45 | - or - | |
46 | $ echo BAR | |
47 | - or - | |
48 | $ echo COOKIE | |
49 | ||
50 | [ word1 | word2 | word3 ] Similar to { word1 | word2 | word3 } | |
51 | except it's optional to give any of | |
52 | those. In addition to the examples | |
53 | above, this would also be valid: | |
54 | ||
55 | $ echo | |
56 | ||
57 | {{ target }} This denotes a mandatory word or | |
58 | sequence of words of some sort. A | |
59 | simple example would be this: | |
60 | ||
61 | $ type {{ filename }} | |
62 | ||
63 | which is to be understood to use the | |
64 | command 'type' on some file name | |
65 | determined by the user. | |
66 | ||
67 | [[ options ]] Similar to {{ target }}, but is | |
68 | optional. | |
69 | ||
70 | Note that the notation assumes spaces around {, }, [, ], {{, }} and | |
71 | [[, ]]. This is to differentiate from OpenVMS directory | |
72 | specifications, which also use [ and ], but without spaces. | |
73 | ||
4109b97c RE |
74 | Quick Start |
75 | ----------- | |
79e259e3 | 76 | |
4109b97c | 77 | If you want to just get on with it, do: |
79e259e3 | 78 | |
2acd8ec7 RL |
79 | on Unix: |
80 | ||
81 | $ ./config | |
82 | $ make | |
83 | $ make test | |
84 | $ make install | |
85 | ||
86 | on OpenVMS: | |
87 | ||
88 | $ @config | |
89 | $ mms | |
90 | $ mms test | |
91 | $ mms install | |
79e259e3 | 92 | |
b32b8961 RL |
93 | on Windows (only pick one of the targets for configuration): |
94 | ||
95 | $ perl Configure { VC-WIN32 | VC-WIN64A | VC-WIN64I | VC-CE } | |
96 | $ nmake | |
97 | $ nmake test | |
8c16829e | 98 | $ nmake install |
b32b8961 | 99 | |
ea24fe29 | 100 | If any of these steps fails, see section Installation in Detail below. |
b1fe6b43 | 101 | |
2acd8ec7 RL |
102 | This will build and install OpenSSL in the default location, which is: |
103 | ||
104 | Unix: normal installation directories under /usr/local | |
105 | OpenVMS: SYS$COMMON:[OPENSSL-'version'...], where 'version' is the | |
667c6bfe RL |
106 | OpenSSL version number with underscores instead of periods. |
107 | Windows: C:\Program Files\OpenSSL or C:\Program Files (x86)\OpenSSL | |
2acd8ec7 RL |
108 | |
109 | If you want to install it anywhere else, run config like this: | |
79e259e3 | 110 | |
2acd8ec7 RL |
111 | On Unix: |
112 | ||
113 | $ ./config --prefix=/opt/openssl --openssldir=/usr/local/ssl | |
114 | ||
115 | On OpenVMS: | |
116 | ||
117 | $ @config --prefix=PROGRAM:[INSTALLS] --openssldir=SYS$MANAGER:[OPENSSL] | |
79e259e3 | 118 | |
62f218cb RL |
119 | (Note: if you do add options to the configuration command, please make sure |
120 | you've read more than just this Quick Start, such as relevant NOTES.* files, | |
121 | the options outline below, as configuration options may change the outcome | |
122 | in otherwise unexpected ways) | |
123 | ||
b1fe6b43 UM |
124 | |
125 | Configuration Options | |
126 | --------------------- | |
127 | ||
2d99cee7 | 128 | There are several options to ./config (or ./Configure) to customize |
8c16829e RL |
129 | the build (note that for Windows, the defaults for --prefix and |
130 | --openssldir depend in what configuration is used and what Windows | |
131 | implementation OpenSSL is built on. More notes on this in NOTES.WIN): | |
2613c1fa | 132 | |
fa28bfd6 MC |
133 | --api=x.y.z |
134 | Don't build with support for deprecated APIs below the | |
135 | specified version number. For example "--api=1.1.0" will | |
136 | remove support for all APIS that were deprecated in OpenSSL | |
137 | version 1.1.0 or below. | |
462ba4f6 | 138 | |
fa28bfd6 MC |
139 | --cross-compile-prefix=PREFIX |
140 | The PREFIX to include in front of commands for your | |
85afea67 AP |
141 | toolchain. It's likely to have to end with dash, e.g. |
142 | a-b-c- would invoke GNU compiler as a-b-c-gcc, etc. | |
143 | Unfortunately cross-compiling is too case-specific to | |
144 | put together one-size-fits-all instructions. You might | |
145 | have to pass more flags or set up environment variables | |
146 | to actually make it work. Android and iOS cases are | |
147 | discussed in corresponding Configurations/10-main.cf | |
148 | sections. But there are cases when this option alone is | |
149 | sufficient. For example to build the mingw64 target on | |
150 | Linux "--cross-compile-prefix=x86_64-w64-mingw32-" | |
151 | works. Naturally provided that mingw packages are | |
152 | installed. Today Debian and Ubuntu users have option to | |
153 | install a number of prepackaged cross-compilers along | |
154 | with corresponding run-time and development packages for | |
155 | "alien" hardware. To give another example | |
156 | "--cross-compile-prefix=mipsel-linux-gnu-" suffices | |
157 | in such case. Needless to mention that you have to | |
158 | invoke ./Configure, not ./config, and pass your target | |
159 | name explicitly. | |
fa28bfd6 MC |
160 | |
161 | --debug | |
162 | Build OpenSSL with debugging symbols. | |
163 | ||
164 | --libdir=DIR | |
165 | The name of the directory under the top of the installation | |
166 | directory tree (see the --prefix option) where libraries will | |
167 | be installed. By default this is "lib". Note that on Windows | |
168 | only ".lib" files will be stored in this location. dll files | |
169 | will always be installed to the "bin" directory. | |
2acd8ec7 | 170 | |
ecabf05e MC |
171 | --openssldir=DIR |
172 | Directory for OpenSSL configuration files, and also the | |
d5957691 MC |
173 | default certificate and key store. Defaults are: |
174 | ||
667c6bfe | 175 | Unix: /usr/local/ssl |
8c16829e RL |
176 | Windows: C:\Program Files\Common Files\SSL |
177 | or C:\Program Files (x86)\Common Files\SSL | |
667c6bfe | 178 | OpenVMS: SYS$COMMON:[OPENSSL-COMMON] |
d5957691 | 179 | |
fa28bfd6 MC |
180 | --prefix=DIR |
181 | The top of the installation directory tree. Defaults are: | |
182 | ||
183 | Unix: /usr/local | |
184 | Windows: C:\Program Files\OpenSSL | |
185 | or C:\Program Files (x86)\OpenSSL | |
186 | OpenVMS: SYS$COMMON:[OPENSSL-'version'] | |
187 | ||
188 | --release | |
189 | Build OpenSSL without debugging symbols. This is the default. | |
190 | ||
191 | --strict-warnings | |
192 | This is a developer flag that switches on various compiler | |
193 | options recommended for OpenSSL development. It only works | |
194 | when using gcc or clang as the compiler. If you are | |
195 | developing a patch for OpenSSL then it is recommended that | |
196 | you use this option where possible. | |
197 | ||
198 | --with-zlib-include=DIR | |
199 | The directory for the location of the zlib include file. This | |
200 | option is only necessary if enable-zlib (see below) is used | |
201 | and the include file is not already on the system include | |
202 | path. | |
203 | ||
204 | --with-zlib-lib=LIB | |
205 | On Unix: this is the directory containing the zlib library. | |
206 | If not provided the system library path will be used. | |
207 | On Windows: this is the filename of the zlib library (with or | |
208 | without a path). This flag must be provided if the | |
209 | zlib-dynamic option is not also used. If zlib-dynamic is used | |
210 | then this flag is optional and a default value ("ZLIB1") is | |
211 | used if not provided. | |
212 | On VMS: this is the filename of the zlib library (with or | |
213 | without a path). This flag is optional and if not provided | |
214 | then "GNV$LIBZSHR", "GNV$LIBZSHR32" or "GNV$LIBZSHR64" is | |
215 | used by default depending on the pointer size chosen. | |
d5957691 | 216 | |
ecabf05e MC |
217 | no-afalgeng |
218 | Don't build the AFALG engine. This option will be forced if | |
219 | on a platform that does not support AFALG. | |
220 | ||
fa28bfd6 | 221 | enable-asan |
f430ba31 | 222 | Build with the Address sanitiser. This is a developer option |
fa28bfd6 MC |
223 | only. It may not work on all platforms and should never be |
224 | used in production environments. It will only work when used | |
225 | with gcc or clang and should be used in conjunction with the | |
226 | no-shared option. | |
227 | ||
ecabf05e | 228 | no-asm |
05328815 MC |
229 | Do not use assembler code. On some platforms a small amount |
230 | of assembler code may still be used. | |
ecabf05e MC |
231 | |
232 | no-async | |
233 | Do not build support for async operations. | |
d5957691 | 234 | |
ecabf05e MC |
235 | no-autoalginit |
236 | Don't automatically load all supported ciphers and digests. | |
d5957691 MC |
237 | Typically OpenSSL will make available all of its supported |
238 | ciphers and digests. For a statically linked application this | |
239 | may be undesirable if small executable size is an objective. | |
240 | This only affects libcrypto. Ciphers and digests will have to | |
241 | be loaded manually using EVP_add_cipher() and | |
ecabf05e MC |
242 | EVP_add_digest() if this option is used. This option will |
243 | force a non-shared build. | |
d5957691 | 244 | |
ecabf05e MC |
245 | no-autoerrinit |
246 | Don't automatically load all libcrypto/libssl error strings. | |
d5957691 MC |
247 | Typically OpenSSL will automatically load human readable |
248 | error strings. For a statically linked application this may | |
249 | be undesirable if small executable size is an objective. | |
250 | ||
d5957691 | 251 | |
ecabf05e MC |
252 | no-capieng |
253 | Don't build the CAPI engine. This option will be forced if | |
254 | on a platform that does not support CAPI. | |
d5957691 | 255 | |
ecabf05e MC |
256 | no-cms |
257 | Don't build support for CMS features | |
d5957691 | 258 | |
ecabf05e MC |
259 | no-comp |
260 | Don't build support for SSL/TLS compression. If this option | |
261 | is left enabled (the default), then compression will only | |
262 | work if the zlib or zlib-dynamic options are also chosen. | |
d5957691 | 263 | |
ecabf05e MC |
264 | enable-crypto-mdebug |
265 | Build support for debugging memory allocated via | |
266 | OPENSSL_malloc() or OPENSSL_zalloc(). | |
267 | ||
268 | enable-crypto-mdebug-backtrace | |
269 | As for crypto-mdebug, but additionally provide backtrace | |
270 | information for allocated memory. | |
8d054a55 RL |
271 | TO BE USED WITH CARE: this uses GNU C functionality, and |
272 | is therefore not usable for non-GNU config targets. If | |
273 | your build complains about the use of '-rdynamic' or the | |
274 | lack of header file execinfo.h, this option is not for you. | |
275 | ALSO NOTE that even though execinfo.h is available on your | |
276 | system (through Gnulib), the functions might just be stubs | |
277 | that do nothing. | |
ecabf05e MC |
278 | |
279 | no-ct | |
280 | Don't build support for Certificate Transparency. | |
281 | ||
282 | no-deprecated | |
283 | Don't build with support for any deprecated APIs. This is the | |
284 | same as using "--api" and supplying the latest version | |
285 | number. | |
286 | ||
287 | no-dgram | |
288 | Don't build support for datagram based BIOs. Selecting this | |
289 | option will also force the disabling of DTLS. | |
290 | ||
291 | no-dso | |
292 | Don't build support for loading Dynamic Shared Objects. | |
293 | ||
294 | no-dynamic-engine | |
295 | Don't build the dynamically loaded engines. This only has an | |
296 | effect in a "shared" build | |
297 | ||
298 | no-ec | |
299 | Don't build support for Elliptic Curves. | |
300 | ||
301 | no-ec2m | |
302 | Don't build support for binary Elliptic Curves | |
303 | ||
304 | enable-ec_nistp_64_gcc_128 | |
305 | Enable support for optimised implementations of some commonly | |
306 | used NIST elliptic curves. This is only supported on some | |
307 | platforms. | |
308 | ||
309 | enable-egd | |
310 | Build support for gathering entropy from EGD (Entropy | |
311 | Gathering Daemon). | |
312 | ||
313 | no-engine | |
314 | Don't build support for loading engines. | |
315 | ||
316 | no-err | |
317 | Don't compile in any error strings. | |
318 | ||
ce2596d4 MC |
319 | enable-external-tests |
320 | Enable building of integration with external test suites. | |
321 | This is a developer option and may not work on all platforms. | |
322 | The only supported external test suite at the current time is | |
5227337a MC |
323 | the BoringSSL test suite. See the file test/README.external |
324 | for further details. | |
ce2596d4 | 325 | |
ecabf05e MC |
326 | no-filenames |
327 | Don't compile in filename and line number information (e.g. | |
328 | for errors and memory allocation). | |
329 | ||
255af26c MC |
330 | enable-fuzz-libfuzzer, enable-fuzz-afl |
331 | Build with support for fuzzing using either libfuzzer or AFL. | |
332 | These are developer options only. They may not work on all | |
333 | platforms and should never be used in production environments. | |
334 | See the file fuzz/README.md for further details. | |
fa28bfd6 | 335 | |
ecabf05e MC |
336 | no-gost |
337 | Don't build support for GOST based ciphersuites. Note that | |
338 | if this feature is enabled then GOST ciphersuites are only | |
339 | available if the GOST algorithms are also available through | |
340 | loading an externally supplied engine. | |
341 | ||
ecabf05e MC |
342 | no-hw-padlock |
343 | Don't build the padlock engine. | |
344 | ||
345 | no-makedepend | |
05328815 | 346 | Don't generate dependencies. |
ecabf05e MC |
347 | |
348 | no-multiblock | |
349 | Don't build support for writing multiple records in one | |
350 | go in libssl (Note: this is a different capability to the | |
351 | pipelining functionality). | |
352 | ||
353 | no-nextprotoneg | |
354 | Don't build support for the NPN TLS extension. | |
355 | ||
356 | no-ocsp | |
357 | Don't build support for OCSP. | |
d5957691 | 358 | |
ecabf05e MC |
359 | no-pic |
360 | Don't build with support for Position Independent Code. | |
d5957691 | 361 | |
ecabf05e MC |
362 | no-posix-io |
363 | Don't use POSIX IO capabilities. | |
364 | ||
365 | no-psk | |
366 | Don't build support for Pre-Shared Key based ciphersuites. | |
367 | ||
368 | no-rdrand | |
369 | Don't use hardware RDRAND capabilities. | |
370 | ||
371 | no-rfc3779 | |
372 | Don't build support for RFC3779 ("X.509 Extensions for IP | |
373 | Addresses and AS Identifiers") | |
374 | ||
ecabf05e MC |
375 | sctp |
376 | Build support for SCTP | |
377 | ||
ce942199 MC |
378 | no-shared |
379 | Do not create shared libraries, only static ones. See "Note | |
380 | on shared libraries" below. | |
d5957691 | 381 | |
ecabf05e MC |
382 | no-sock |
383 | Don't build support for socket BIOs | |
d5957691 | 384 | |
ecabf05e MC |
385 | no-srp |
386 | Don't build support for SRP or SRP based ciphersuites. | |
387 | ||
388 | no-srtp | |
389 | Don't build SRTP support | |
d5957691 | 390 | |
ecabf05e | 391 | no-sse2 |
5ae5dc96 AP |
392 | Exclude SSE2 code paths from 32-bit x86 assembly modules. |
393 | Normally SSE2 extension is detected at run-time, but the | |
394 | decision whether or not the machine code will be executed | |
395 | is taken solely on CPU capability vector. This means that | |
396 | if you happen to run OS kernel which does not support SSE2 | |
397 | extension on Intel P4 processor, then your application | |
398 | might be exposed to "illegal instruction" exception. | |
399 | There might be a way to enable support in kernel, e.g. | |
400 | FreeBSD kernel can be compiled with CPU_ENABLE_SSE, and | |
401 | there is a way to disengage SSE2 code paths upon application | |
402 | start-up, but if you aim for wider "audience" running | |
403 | such kernel, consider no-sse2. Both the 386 and | |
404 | no-asm options imply no-sse2. | |
d5957691 | 405 | |
ecabf05e MC |
406 | enable-ssl-trace |
407 | Build with the SSL Trace capabilities (adds the "-trace" | |
408 | option to s_client and s_server). | |
409 | ||
410 | no-static-engine | |
411 | Don't build the statically linked engines. This only | |
412 | has an impact when not built "shared". | |
413 | ||
414 | no-stdio | |
415 | Don't use any C "stdio" features. Only libcrypto and libssl | |
416 | can be built in this way. Using this option will suppress | |
417 | building the command line applications. Additionally since | |
418 | the OpenSSL tests also use the command line applications the | |
419 | tests will also be skipped. | |
420 | ||
93880ce1 RL |
421 | no-tests |
422 | Don't build test programs or run any test. | |
423 | ||
ecabf05e MC |
424 | no-threads |
425 | Don't try to build with support for multi-threaded | |
426 | applications. | |
427 | ||
428 | threads | |
429 | Build with support for multi-threaded applications. Most | |
430 | platforms will enable this by default. However if on a | |
431 | platform where this is not the case then this will usually | |
432 | require additional system-dependent options! See "Note on | |
433 | multi-threading" below. | |
434 | ||
3556b83e MC |
435 | enable-tls13downgrade |
436 | TODO(TLS1.3): Make this enabled by default and remove the | |
437 | option when TLSv1.3 is out of draft | |
438 | TLSv1.3 offers a downgrade protection mechanism. This is | |
439 | implemented but disabled by default. It should not typically | |
440 | be enabled except for testing purposes. Otherwise this could | |
441 | cause problems if a pre-RFC version of OpenSSL talks to an | |
442 | RFC implementation (it will erroneously be detected as a | |
443 | downgrade). | |
444 | ||
ecabf05e MC |
445 | no-ts |
446 | Don't build Time Stamping Authority support. | |
447 | ||
fa28bfd6 | 448 | enable-ubsan |
f430ba31 | 449 | Build with the Undefined Behaviour sanitiser. This is a |
fa28bfd6 MC |
450 | developer option only. It may not work on all platforms and |
451 | should never be used in production environments. It will only | |
452 | work when used with gcc or clang and should be used in | |
453 | conjunction with the "-DPEDANTIC" option (or the | |
454 | --strict-warnings option). | |
455 | ||
ecabf05e MC |
456 | no-ui |
457 | Don't build with the "UI" capability (i.e. the set of | |
458 | features enabling text based prompts). | |
459 | ||
460 | enable-unit-test | |
461 | Enable additional unit test APIs. This should not typically | |
462 | be used in production deployments. | |
463 | ||
464 | enable-weak-ssl-ciphers | |
465 | Build support for SSL/TLS ciphers that are considered "weak" | |
466 | (e.g. RC4 based ciphersuites). | |
467 | ||
468 | zlib | |
469 | Build with support for zlib compression/decompression. | |
470 | ||
471 | zlib-dynamic | |
472 | Like "zlib", but has OpenSSL load the zlib library | |
473 | dynamically when needed. This is only supported on systems | |
474 | where loading of shared libraries is supported. | |
475 | ||
476 | 386 | |
5ae5dc96 AP |
477 | In 32-bit x86 builds, when generating assembly modules, |
478 | use the 80386 instruction set only (the default x86 code | |
479 | is more efficient, but requires at least a 486). Note: | |
480 | This doesn't affect code generated by compiler, you're | |
481 | likely to complement configuration command line with | |
482 | suitable compiler-specific option. | |
d5957691 | 483 | |
84a68336 MC |
484 | enable-tls1_3 |
485 | TODO(TLS1.3): Make this enabled by default | |
486 | Build support for TLS1.3. Note: This is a WIP feature and | |
487 | does not currently interoperate with other TLS1.3 | |
488 | implementations! Use with caution!! | |
489 | ||
ecabf05e MC |
490 | no-<prot> |
491 | Don't build support for negotiating the specified SSL/TLS | |
492 | protocol (one of ssl, ssl3, tls, tls1, tls1_1, tls1_2, dtls, | |
493 | dtls1 or dtls1_2). If "no-tls" is selected then all of tls1, | |
494 | tls1_1 and tls1_2 are disabled. Similarly "no-dtls" will | |
495 | disable dtls1 and dtls1_2. The "no-ssl" option is synonymous | |
496 | with "no-ssl3". Note this only affects version negotiation. | |
497 | OpenSSL will still provide the methods for applications to | |
498 | explicitly select the individual protocol versions. | |
499 | ||
500 | no-<prot>-method | |
501 | As for no-<prot> but in addition do not build the methods for | |
502 | applications to explicitly select individual protocol | |
503 | versions. | |
504 | ||
505 | enable-<alg> | |
506 | Build with support for the specified algorithm, where <alg> | |
42e22c7c | 507 | is one of: md2 or rc5. |
ecabf05e MC |
508 | |
509 | no-<alg> | |
510 | Build without support for the specified algorithm, where | |
511 | <alg> is one of: bf, blake2, camellia, cast, chacha, cmac, | |
42e22c7c | 512 | des, dh, dsa, ecdh, ecdsa, idea, md4, mdc2, ocb, poly1305, |
3f5616d7 TS |
513 | rc2, rc4, rmd160, scrypt, seed, siphash or whirlpool. The |
514 | "ripemd" algorithm is deprecated and if used is synonymous | |
515 | with rmd160. | |
ecabf05e | 516 | |
a3cb4cfc | 517 | -Dxxx, lxxx, -Lxxx, -Wl, -rpath, -R, -framework, -static |
a74341f9 | 518 | These system specific options will be recognised and |
a3cb4cfc RL |
519 | passed through to the compiler to allow you to define |
520 | preprocessor symbols, specify additional libraries, library | |
521 | directories or other compiler options. It might be worth | |
522 | noting that some compilers generate code specifically for | |
523 | processor the compiler currently executes on. This is not | |
524 | necessarily what you might have in mind, since it might be | |
525 | unsuitable for execution on other, typically older, | |
526 | processor. Consult your compiler documentation. | |
527 | ||
528 | -xxx, +xxx | |
529 | Additional options that are not otherwise recognised are | |
530 | passed through as they are to the compiler as well. Again, | |
531 | consult your compiler documentation. | |
b1fe6b43 | 532 | |
79e259e3 | 533 | |
4109b97c RE |
534 | Installation in Detail |
535 | ---------------------- | |
c9f06e7f | 536 | |
4109b97c | 537 | 1a. Configure OpenSSL for your operation system automatically: |
c9f06e7f | 538 | |
b32b8961 RL |
539 | NOTE: This is not available on Windows. |
540 | ||
ea24fe29 | 541 | $ ./config [[ options ]] # Unix |
2acd8ec7 RL |
542 | |
543 | or | |
544 | ||
ea24fe29 | 545 | $ @config [[ options ]] ! OpenVMS |
2acd8ec7 RL |
546 | |
547 | For the remainder of this text, the Unix form will be used in all | |
548 | examples, please use the appropriate form for your platform. | |
c9f06e7f | 549 | |
4109b97c | 550 | This guesses at your operating system (and compiler, if necessary) and |
b1fe6b43 | 551 | configures OpenSSL based on this guess. Run ./config -t to see |
db209ec2 UM |
552 | if it guessed correctly. If you want to use a different compiler, you |
553 | are cross-compiling for another platform, or the ./config guess was | |
554 | wrong for other reasons, go to step 1b. Otherwise go to step 2. | |
c9f06e7f | 555 | |
b1fe6b43 UM |
556 | On some systems, you can include debugging information as follows: |
557 | ||
ea24fe29 | 558 | $ ./config -d [[ options ]] |
b1fe6b43 | 559 | |
c9f06e7f | 560 | 1b. Configure OpenSSL for your operating system manually |
79e259e3 | 561 | |
4109b97c RE |
562 | OpenSSL knows about a range of different operating system, hardware and |
563 | compiler combinations. To see the ones it knows about, run | |
79e259e3 | 564 | |
2acd8ec7 RL |
565 | $ ./Configure # Unix |
566 | ||
567 | or | |
568 | ||
569 | $ perl Configure # All other platforms | |
570 | ||
571 | For the remainder of this text, the Unix form will be used in all | |
572 | examples, please use the appropriate form for your platform. | |
79e259e3 | 573 | |
4109b97c RE |
574 | Pick a suitable name from the list that matches your system. For most |
575 | operating systems there is a choice between using "cc" or "gcc". When | |
576 | you have identified your system (and if necessary compiler) use this name | |
2acd8ec7 | 577 | as the argument to Configure. For example, a "linux-elf" user would |
4109b97c | 578 | run: |
79e259e3 | 579 | |
ea24fe29 | 580 | $ ./Configure linux-elf [[ options ]] |
79e259e3 | 581 | |
5bb9e2b4 | 582 | If your system isn't listed, you will have to create a configuration |
ea24fe29 | 583 | file named Configurations/{{ something }}.conf and add the correct |
5bb9e2b4 RL |
584 | configuration for your system. See the available configs as examples |
585 | and read Configurations/README and Configurations/README.design for | |
586 | more information. | |
79e259e3 | 587 | |
5bb9e2b4 RL |
588 | The generic configurations "cc" or "gcc" should usually work on 32 bit |
589 | Unix-like systems. | |
590 | ||
fa28bfd6 MC |
591 | Configure creates a build file ("Makefile" on Unix, "makefile" on Windows |
592 | and "descrip.mms" on OpenVMS) from a suitable template in Configurations, | |
593 | and defines various macros in include/openssl/opensslconf.h (generated from | |
594 | include/openssl/opensslconf.h.in). | |
79e259e3 | 595 | |
2acd8ec7 RL |
596 | 1c. Configure OpenSSL for building outside of the source tree. |
597 | ||
598 | OpenSSL can be configured to build in a build directory separate from | |
599 | the directory with the source code. It's done by placing yourself in | |
600 | some other directory and invoking the configuration commands from | |
601 | there. | |
602 | ||
603 | Unix example: | |
604 | ||
605 | $ mkdir /var/tmp/openssl-build | |
606 | $ cd /var/tmp/openssl-build | |
ea24fe29 | 607 | $ /PATH/TO/OPENSSL/SOURCE/config [[ options ]] |
2acd8ec7 RL |
608 | |
609 | or | |
610 | ||
ea24fe29 | 611 | $ /PATH/TO/OPENSSL/SOURCE/Configure {{ target }} [[ options ]] |
2acd8ec7 RL |
612 | |
613 | OpenVMS example: | |
614 | ||
615 | $ set default sys$login: | |
616 | $ create/dir [.tmp.openssl-build] | |
617 | $ set default [.tmp.openssl-build] | |
ea24fe29 | 618 | $ @[PATH.TO.OPENSSL.SOURCE]config [[ options ]] |
2acd8ec7 RL |
619 | |
620 | or | |
621 | ||
ea24fe29 | 622 | $ @[PATH.TO.OPENSSL.SOURCE]Configure {{ target }} [[ options ]] |
2acd8ec7 | 623 | |
b32b8961 RL |
624 | Windows example: |
625 | ||
626 | $ C: | |
627 | $ mkdir \temp-openssl | |
628 | $ cd \temp-openssl | |
ea24fe29 | 629 | $ perl d:\PATH\TO\OPENSSL\SOURCE\Configure {{ target }} [[ options ]] |
b32b8961 | 630 | |
2acd8ec7 RL |
631 | Paths can be relative just as well as absolute. Configure will |
632 | do its best to translate them to relative paths whenever possible. | |
633 | ||
462ba4f6 | 634 | 2. Build OpenSSL by running: |
79e259e3 | 635 | |
2acd8ec7 RL |
636 | $ make # Unix |
637 | $ mms ! (or mmk) OpenVMS | |
b32b8961 | 638 | $ nmake # Windows |
79e259e3 | 639 | |
2acd8ec7 RL |
640 | This will build the OpenSSL libraries (libcrypto.a and libssl.a on |
641 | Unix, corresponding on other platforms) and the OpenSSL binary | |
642 | ("openssl"). The libraries will be built in the top-level directory, | |
643 | and the binary will be in the "apps" subdirectory. | |
79e259e3 | 644 | |
1e62cc12 RS |
645 | If the build fails, look at the output. There may be reasons |
646 | for the failure that aren't problems in OpenSSL itself (like | |
647 | missing standard headers). If you are having problems you can | |
648 | get help by sending an email to the openssl-users email list (see | |
649 | https://www.openssl.org/community/mailinglists.html for details). If | |
650 | it is a bug with OpenSSL itself, please open an issue on GitHub, at | |
651 | https://github.com/openssl/openssl/issues. Please review the existing | |
652 | ones first; maybe the bug was already reported or has already been | |
d5957691 | 653 | fixed. |
b1fe6b43 | 654 | |
ea24fe29 RL |
655 | (If you encounter assembler error messages, try the "no-asm" |
656 | configuration option as an immediate fix.) | |
436a376b | 657 | |
91174a91 UM |
658 | Compiling parts of OpenSSL with gcc and others with the system |
659 | compiler will result in unresolved symbols on some systems. | |
660 | ||
462ba4f6 | 661 | 3. After a successful build, the libraries should be tested. Run: |
79e259e3 | 662 | |
2acd8ec7 RL |
663 | $ make test # Unix |
664 | $ mms test ! OpenVMS | |
b32b8961 | 665 | $ nmake test # Windows |
79e259e3 | 666 | |
6616429d | 667 | NOTE: you MUST run the tests from an unprivileged account (or |
f430ba31 | 668 | disable your privileges temporarily if your platform allows it). |
6616429d | 669 | |
2e996acf RL |
670 | If some tests fail, look at the output. There may be reasons for |
671 | the failure that isn't a problem in OpenSSL itself (like a | |
672 | malfunction with Perl). You may want increased verbosity, that | |
673 | can be accomplished like this: | |
674 | ||
be6bdab6 | 675 | $ make VERBOSE=1 test # Unix |
2acd8ec7 | 676 | |
e8173157 | 677 | $ mms /macro=(VERBOSE=1) test ! OpenVMS |
2e996acf | 678 | |
be6bdab6 | 679 | $ nmake VERBOSE=1 test # Windows |
b32b8961 | 680 | |
2e996acf RL |
681 | If you want to run just one or a few specific tests, you can use |
682 | the make variable TESTS to specify them, like this: | |
683 | ||
2acd8ec7 RL |
684 | $ make TESTS='test_rsa test_dsa' test # Unix |
685 | $ mms/macro="TESTS=test_rsa test_dsa" test ! OpenVMS | |
b32b8961 | 686 | $ nmake TESTS='test_rsa test_dsa' test # Windows |
2e996acf | 687 | |
2acd8ec7 | 688 | And of course, you can combine (Unix example shown): |
2e996acf | 689 | |
be6bdab6 | 690 | $ make VERBOSE=1 TESTS='test_rsa test_dsa' test |
2e996acf RL |
691 | |
692 | You can find the list of available tests like this: | |
693 | ||
2acd8ec7 | 694 | $ make list-tests # Unix |
5bb9e2b4 | 695 | $ mms list-tests ! OpenVMS |
b32b8961 | 696 | $ nmake list-tests # Windows |
2e996acf | 697 | |
d40b0622 RL |
698 | Have a look at the manual for the perl module Test::Harness to |
699 | see what other HARNESS_* variables there are. | |
700 | ||
2e996acf | 701 | If you find a problem with OpenSSL itself, try removing any |
2acd8ec7 RL |
702 | compiler optimization flags from the CFLAGS line in Makefile and |
703 | run "make clean; make" or corresponding. | |
2e996acf | 704 | |
fa28bfd6 | 705 | Please send bug reports to <rt@openssl.org>. |
b1fe6b43 | 706 | |
b3e718e2 RL |
707 | For more details on how the make variables TESTS can be used, |
708 | see section TESTS in Detail below. | |
709 | ||
462ba4f6 | 710 | 4. If everything tests ok, install OpenSSL with |
79e259e3 | 711 | |
2acd8ec7 RL |
712 | $ make install # Unix |
713 | $ mms install ! OpenVMS | |
fa28bfd6 | 714 | $ nmake install # Windows |
2acd8ec7 RL |
715 | |
716 | This will install all the software components in this directory | |
717 | tree under PREFIX (the directory given with --prefix or its | |
718 | default): | |
719 | ||
720 | Unix: | |
721 | ||
722 | bin/ Contains the openssl binary and a few other | |
723 | utility scripts. | |
724 | include/openssl | |
725 | Contains the header files needed if you want | |
726 | to build your own programs that use libcrypto | |
727 | or libssl. | |
728 | lib Contains the OpenSSL library files. | |
729 | lib/engines Contains the OpenSSL dynamically loadable engines. | |
ea24fe29 RL |
730 | |
731 | share/man/man1 Contains the OpenSSL command line man-pages. | |
732 | share/man/man3 Contains the OpenSSL library calls man-pages. | |
733 | share/man/man5 Contains the OpenSSL configuration format man-pages. | |
734 | share/man/man7 Contains the OpenSSL other misc man-pages. | |
735 | ||
736 | share/doc/openssl/html/man1 | |
737 | share/doc/openssl/html/man3 | |
738 | share/doc/openssl/html/man5 | |
739 | share/doc/openssl/html/man7 | |
2acd8ec7 RL |
740 | Contains the HTML rendition of the man-pages. |
741 | ||
742 | OpenVMS ('arch' is replaced with the architecture name, "Alpha" | |
d178ddb3 RL |
743 | or "ia64", 'sover' is replaced with the shared library version |
744 | (0101 for 1.1), and 'pz' is replaced with the pointer size | |
745 | OpenSSL was built with): | |
2acd8ec7 | 746 | |
d178ddb3 RL |
747 | [.EXE.'arch'] Contains the openssl binary. |
748 | [.EXE] Contains a few utility scripts. | |
2acd8ec7 RL |
749 | [.include.openssl] |
750 | Contains the header files needed if you want | |
751 | to build your own programs that use libcrypto | |
752 | or libssl. | |
753 | [.LIB.'arch'] Contains the OpenSSL library files. | |
d178ddb3 | 754 | [.ENGINES'sover''pz'.'arch'] |
2acd8ec7 RL |
755 | Contains the OpenSSL dynamically loadable engines. |
756 | [.SYS$STARTUP] Contains startup, login and shutdown scripts. | |
757 | These define appropriate logical names and | |
758 | command symbols. | |
d178ddb3 RL |
759 | [.SYSTEST] Contains the installation verification procedure. |
760 | [.HTML] Contains the HTML rendition of the manual pages. | |
2acd8ec7 RL |
761 | |
762 | ||
763 | Additionally, install will add the following directories under | |
764 | OPENSSLDIR (the directory given with --openssldir or its default) | |
765 | for you convenience: | |
766 | ||
767 | certs Initially empty, this is the default location | |
768 | for certificate files. | |
769 | private Initially empty, this is the default location | |
770 | for private key files. | |
771 | misc Various scripts. | |
60cdb821 | 772 | |
e5f3045f BM |
773 | Package builders who want to configure the library for standard |
774 | locations, but have the package installed somewhere else so that | |
775 | it can easily be packaged, can use | |
776 | ||
2acd8ec7 RL |
777 | $ make DESTDIR=/tmp/package-root install # Unix |
778 | $ mms/macro="DESTDIR=TMP:[PACKAGE-ROOT]" install ! OpenVMS | |
e5f3045f | 779 | |
3c65577f | 780 | The specified destination directory will be prepended to all |
2acd8ec7 | 781 | installation target paths. |
4fd53220 | 782 | |
2acd8ec7 | 783 | Compatibility issues with previous OpenSSL versions: |
4fd53220 BM |
784 | |
785 | * COMPILING existing applications | |
786 | ||
fa28bfd6 | 787 | OpenSSL 1.1.0 hides a number of structures that were previously |
2acd8ec7 RL |
788 | open. This includes all internal libssl structures and a number |
789 | of EVP types. Accessor functions have been added to allow | |
790 | controlled access to the structures' data. | |
4fd53220 | 791 | |
2acd8ec7 RL |
792 | This means that some software needs to be rewritten to adapt to |
793 | the new ways of doing things. This often amounts to allocating | |
794 | an instance of a structure explicitly where you could previously | |
795 | allocate them on the stack as automatic variables, and using the | |
796 | provided accessor functions where you would previously access a | |
797 | structure's field directly. | |
4fd53220 | 798 | |
2acd8ec7 RL |
799 | Some APIs have changed as well. However, older APIs have been |
800 | preserved when possible. | |
4fd53220 | 801 | |
fa28bfd6 MC |
802 | Environment Variables |
803 | --------------------- | |
804 | ||
805 | A number of environment variables can be used to provide additional control | |
806 | over the build process. Typically these should be defined prior to running | |
807 | config or Configure. Not all environment variables are relevant to all | |
808 | platforms. | |
809 | ||
810 | AR | |
811 | The name of the ar executable to use. | |
812 | ||
ed43fe73 RL |
813 | BUILDFILE |
814 | Use a different build file name than the platform default | |
815 | ("Makefile" on Unixly platforms, "makefile" on native Windows, | |
816 | "descrip.mms" on OpenVMS). This requires that there is a | |
817 | corresponding build file template. See Configurations/README | |
818 | for further information. | |
819 | ||
fa28bfd6 MC |
820 | CC |
821 | The compiler to use. Configure will attempt to pick a default | |
822 | compiler for your platform but this choice can be overridden | |
823 | using this variable. Set it to the compiler executable you wish | |
824 | to use, e.g. "gcc" or "clang". | |
825 | ||
826 | CROSS_COMPILE | |
827 | This environment variable has the same meaning as for the | |
828 | "--cross-compile-prefix" Configure flag described above. If both | |
829 | are set then the Configure flag takes precedence. | |
830 | ||
831 | NM | |
832 | The name of the nm executable to use. | |
833 | ||
834 | OPENSSL_LOCAL_CONFIG_DIR | |
835 | OpenSSL comes with a database of information about how it | |
bf98d9da RL |
836 | should be built on different platforms as well as build file |
837 | templates for those platforms. The database is comprised of | |
838 | ".conf" files in the Configurations directory. The build | |
839 | file templates reside there as well as ".tmpl" files. See the | |
fa28bfd6 | 840 | file Configurations/README for further information about the |
bf98d9da RL |
841 | format of ".conf" files as well as information on the ".tmpl" |
842 | files. | |
843 | In addition to the standard ".conf" and ".tmpl" files, it is | |
844 | possible to create your own ".conf" and ".tmpl" files and store | |
845 | them locally, outside the OpenSSL source tree. This environment | |
846 | variable can be set to the directory where these files are held | |
b509b6d7 BK |
847 | and will be considered by Configure before it looks in the |
848 | standard directories. | |
fa28bfd6 MC |
849 | |
850 | PERL | |
d513369b | 851 | The name of the Perl executable to use when building OpenSSL. |
758baa3d AP |
852 | This variable is used in config script only. Configure on the |
853 | other hand imposes the interpreter by which it itself was | |
854 | executed on the whole build procedure. | |
d513369b RL |
855 | |
856 | HASHBANGPERL | |
857 | The command string for the Perl executable to insert in the | |
858 | #! line of perl scripts that will be publically installed. | |
859 | Default: /usr/bin/env perl | |
860 | Note: the value of this variable is added to the same scripts | |
861 | on all platforms, but it's only relevant on Unix-like platforms. | |
fa28bfd6 MC |
862 | |
863 | RC | |
864 | The name of the rc executable to use. The default will be as | |
865 | defined for the target platform in the ".conf" file. If not | |
866 | defined then "windres" will be used. The WINDRES environment | |
867 | variable is synonymous to this. If both are defined then RC | |
868 | takes precedence. | |
869 | ||
870 | RANLIB | |
871 | The name of the ranlib executable to use. | |
872 | ||
873 | WINDRES | |
874 | See RC. | |
875 | ||
876 | Makefile targets | |
877 | ---------------- | |
878 | ||
879 | The Configure script generates a Makefile in a format relevant to the specific | |
880 | platform. The Makefiles provide a number of targets that can be used. Not all | |
881 | targets may be available on all platforms. Only the most common targets are | |
882 | described here. Examine the Makefiles themselves for the full list. | |
883 | ||
884 | all | |
885 | The default target to build all the software components. | |
886 | ||
887 | clean | |
888 | Remove all build artefacts and return the directory to a "clean" | |
889 | state. | |
890 | ||
891 | depend | |
892 | Rebuild the dependencies in the Makefiles. This is a legacy | |
893 | option that no longer needs to be used in OpenSSL 1.1.0. | |
894 | ||
895 | install | |
896 | Install all OpenSSL components. | |
897 | ||
898 | install_sw | |
899 | Only install the OpenSSL software components. | |
900 | ||
901 | install_docs | |
902 | Only install the OpenSSL documentation components. | |
903 | ||
904 | install_man_docs | |
905 | Only install the OpenSSL man pages (Unix only). | |
906 | ||
907 | install_html_docs | |
908 | Only install the OpenSSL html documentation. | |
909 | ||
910 | list-tests | |
911 | Prints a list of all the self test names. | |
912 | ||
913 | test | |
914 | Build and run the OpenSSL self tests. | |
915 | ||
916 | uninstall | |
917 | Uninstall all OpenSSL components. | |
918 | ||
919 | update | |
920 | This is a developer option. If you are developing a patch for | |
921 | OpenSSL you may need to use this if you want to update | |
922 | automatically generated files; add new error codes or add new | |
923 | (or change the visibility of) public API functions. (Unix only). | |
4fd53220 | 924 | |
b3e718e2 RL |
925 | TESTS in Detail |
926 | --------------- | |
927 | ||
928 | The make variable TESTS supports a versatile set of space separated tokens | |
929 | with which you can specify a set of tests to be performed. With a "current | |
930 | set of tests" in mind, initially being empty, here are the possible tokens: | |
931 | ||
932 | alltests The current set of tests becomes the whole set of available | |
933 | tests (as listed when you do 'make list-tests' or similar). | |
934 | xxx Adds the test 'xxx' to the current set of tests. | |
935 | -xxx Removes 'xxx' from the current set of tests. If this is the | |
936 | first token in the list, the current set of tests is first | |
937 | assigned the whole set of available tests, effectively making | |
d0631327 RL |
938 | this token equivalent to TESTS="alltests -xxx". |
939 | nn Adds the test group 'nn' (which is a number) to the current | |
940 | set of tests. | |
941 | -nn Removes the test group 'nn' from the current set of tests. | |
942 | If this is the first token in the list, the current set of | |
943 | tests is first assigned the whole set of available tests, | |
944 | effectively making this token equivalent to | |
945 | TESTS="alltests -xxx". | |
b3e718e2 RL |
946 | |
947 | Also, all tokens except for "alltests" may have wildcards, such as *. | |
948 | (on Unix and Windows, BSD style wildcards are supported, while on VMS, | |
949 | it's VMS style wildcards) | |
950 | ||
951 | Example: All tests except for the fuzz tests: | |
952 | ||
953 | $ make TESTS=-test_fuzz test | |
954 | ||
955 | or (if you want to be explicit) | |
956 | ||
957 | $ make TESTS='alltests -test_fuzz' test | |
958 | ||
959 | Example: All tests that have a name starting with "test_ssl" but not those | |
960 | starting with "test_ssl_": | |
961 | ||
962 | $ make TESTS='test_ssl* -test_ssl_*' test | |
963 | ||
d0631327 RL |
964 | Example: Only test group 10: |
965 | ||
966 | $ make TESTS='10' | |
967 | ||
968 | Example: All tests except the slow group (group 99): | |
969 | ||
970 | $ make TESTS='-99' | |
971 | ||
972 | Example: All tests in test groups 80 to 99 except for tests in group 90: | |
973 | ||
974 | $ make TESTS='[89]? -90' | |
975 | ||
5f8d5c96 BM |
976 | Note on multi-threading |
977 | ----------------------- | |
978 | ||
979 | For some systems, the OpenSSL Configure script knows what compiler options | |
980 | are needed to generate a library that is suitable for multi-threaded | |
981 | applications. On these systems, support for multi-threading is enabled | |
982 | by default; use the "no-threads" option to disable (this should never be | |
983 | necessary). | |
984 | ||
985 | On other systems, to enable support for multi-threading, you will have | |
33d50ef6 | 986 | to specify at least two options: "threads", and a system-dependent option. |
5f8d5c96 BM |
987 | (The latter is "-D_REENTRANT" on various systems.) The default in this |
988 | case, obviously, is not to include support for multi-threading (but | |
989 | you can still use "no-threads" to suppress an annoying warning message | |
990 | from the Configure script.) | |
991 | ||
35d8fa56 | 992 | OpenSSL provides built-in support for two threading models: pthreads (found on |
8b75603c MC |
993 | most UNIX/Linux systems), and Windows threads. No other threading models are |
994 | supported. If your platform does not provide pthreads or Windows threads then | |
995 | you should Configure with the "no-threads" option. | |
fcc6a1c4 | 996 | |
4fa3f08f RL |
997 | Notes on shared libraries |
998 | ------------------------- | |
fcc6a1c4 | 999 | |
ce942199 MC |
1000 | For most systems the OpenSSL Configure script knows what is needed to |
1001 | build shared libraries for libcrypto and libssl. On these systems | |
1002 | the shared libraries will be created by default. This can be suppressed and | |
1003 | only static libraries created by using the "no-shared" option. On systems | |
1004 | where OpenSSL does not know how to build shared libraries the "no-shared" | |
1005 | option will be forced and only static libraries will be created. | |
96c930dd | 1006 | |
4fa3f08f RL |
1007 | Shared libraries are named a little differently on different platforms. |
1008 | One way or another, they all have the major OpenSSL version number as | |
1009 | part of the file name, i.e. for OpenSSL 1.1.x, 1.1 is somehow part of | |
1010 | the name. | |
1011 | ||
1012 | On most POSIXly platforms, shared libraries are named libcrypto.so.1.1 | |
1013 | and libssl.so.1.1. | |
1014 | ||
1015 | on Cygwin, shared libraries are named cygcrypto-1.1.dll and cygssl-1.1.dll | |
1016 | with import libraries libcrypto.dll.a and libssl.dll.a. | |
1017 | ||
1018 | On Windows build with MSVC or using MingW, shared libraries are named | |
1019 | libcrypto-1_1.dll and libssl-1_1.dll for 32-bit Windows, libcrypto-1_1-x64.dll | |
1020 | and libssl-1_1-x64.dll for 64-bit x86_64 Windows, and libcrypto-1_1-ia64.dll | |
1021 | and libssl-1_1-ia64.dll for IA64 Windows. With MSVC, the import libraries | |
1022 | are named libcrypto.lib and libssl.lib, while with MingW, they are named | |
b77b6127 | 1023 | libcrypto.dll.a and libssl.dll.a. |
4fa3f08f RL |
1024 | |
1025 | On VMS, shareable images (VMS speak for shared libraries) are named | |
1026 | ossl$libcrypto0101_shr.exe and ossl$libssl0101_shr.exe. However, when | |
1027 | OpenSSL is specifically built for 32-bit pointers, the shareable images | |
1028 | are named ossl$libcrypto0101_shr32.exe and ossl$libssl0101_shr32.exe | |
1029 | instead, and when built for 64-bit pointers, they are named | |
1030 | ossl$libcrypto0101_shr64.exe and ossl$libssl0101_shr64.exe. | |
1031 | ||
96c930dd LJ |
1032 | Note on random number generation |
1033 | -------------------------------- | |
1034 | ||
1035 | Availability of cryptographically secure random numbers is required for | |
1036 | secret key generation. OpenSSL provides several options to seed the | |
1037 | internal PRNG. If not properly seeded, the internal PRNG will refuse | |
1038 | to deliver random bytes and a "PRNG not seeded error" will occur. | |
1039 | On systems without /dev/urandom (or similar) device, it may be necessary | |
fa28bfd6 | 1040 | to install additional support software to obtain a random seed. |
96c930dd LJ |
1041 | Please check out the manual pages for RAND_add(), RAND_bytes(), RAND_egd(), |
1042 | and the FAQ for more information. | |
4a9476dd | 1043 |