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[dragonfly.git] / secure / lib / libcrypto / man / OpenSSL_add_all_algorithms.3
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80.\" If the F register is turned on, we'll generate
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96.TH OpenSSL_add_all_algorithms 3 "0.9.7d" "2/Sep/2004" "OpenSSL"
97.UC
98.if n .hy 0
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188.\}
189.rm #[ #] #H #V #F C
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190.SH "NAME"
191OpenSSL_add_all_algorithms, OpenSSL_add_all_ciphers, OpenSSL_add_all_digests \-
192add algorithms to internal table
193.SH "SYNOPSIS"
74dab6c2 194.PP
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195.Vb 1
196\& #include <openssl/evp.h>
197.Ve
198.Vb 3
199\& void OpenSSL_add_all_algorithms(void);
200\& void OpenSSL_add_all_ciphers(void);
201\& void OpenSSL_add_all_digests(void);
202.Ve
203.Vb 1
204\& void EVP_cleanup(void);
205.Ve
206.SH "DESCRIPTION"
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207OpenSSL keeps an internal table of digest algorithms and ciphers. It uses
208this table to lookup ciphers via functions such as \fIEVP_get_cipher_byname()\fR.
209.PP
74dab6c2 210\fIOpenSSL_add_all_digests()\fR adds all digest algorithms to the table.
984263bc 211.PP
74dab6c2 212\fIOpenSSL_add_all_algorithms()\fR adds all algorithms to the table (digests and
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213ciphers).
214.PP
74dab6c2 215\fIOpenSSL_add_all_ciphers()\fR adds all encryption algorithms to the table including
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216password based encryption algorithms.
217.PP
74dab6c2 218\fIEVP_cleanup()\fR removes all ciphers and digests from the table.
984263bc 219.SH "RETURN VALUES"
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220None of the functions return a value.
221.SH "NOTES"
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222A typical application will call \fIOpenSSL_add_all_algorithms()\fR initially and
223\fIEVP_cleanup()\fR before exiting.
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224.PP
225An application does not need to add algorithms to use them explicitly, for example
226by \fIEVP_sha1()\fR. It just needs to add them if it (or any of the functions it calls)
227needs to lookup algorithms.
228.PP
229The cipher and digest lookup functions are used in many parts of the library. If
230the table is not initialized several functions will misbehave and complain they
74dab6c2 231cannot find algorithms. This includes the PEM, PKCS#12, SSL and S/MIME libraries.
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232This is a common query in the OpenSSL mailing lists.
233.PP
234Calling \fIOpenSSL_add_all_algorithms()\fR links in all algorithms: as a result a
235statically linked executable can be quite large. If this is important it is possible
236to just add the required ciphers and digests.
237.SH "BUGS"
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238Although the functions do not return error codes it is possible for them to fail.
239This will only happen as a result of a memory allocation failure so this is not
240too much of a problem in practice.
241.SH "SEE ALSO"
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242evp(3), EVP_DigestInit(3),
243EVP_EncryptInit(3)
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244
245.rn }` ''
246.IX Title "OpenSSL_add_all_algorithms 3"
247.IX Name "OpenSSL_add_all_algorithms, OpenSSL_add_all_ciphers, OpenSSL_add_all_digests - add algorithms to internal table"
248
249.IX Header "NAME"
250
251.IX Header "SYNOPSIS"
252
253.IX Header "DESCRIPTION"
254
255.IX Header "RETURN VALUES"
256
257.IX Header "NOTES"
258
259.IX Header "BUGS"
260
261.IX Header "SEE ALSO"
262