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# Conflicts: # README.md
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@@ -9,8 +9,8 @@ EVP_DigestSignInit, EVP_DigestSignUpdate, EVP_DigestSignFinal - EVP signing func
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#include <openssl/evp.h>
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int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
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const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey);
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int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *d, unsigned int cnt);
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const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey);
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int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *d, size_t cnt);
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int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen);
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=head1 DESCRIPTION
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@@ -18,15 +18,15 @@ EVP_DigestSignInit, EVP_DigestSignUpdate, EVP_DigestSignFinal - EVP signing func
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The EVP signature routines are a high level interface to digital signatures.
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EVP_DigestSignInit() sets up signing context B<ctx> to use digest B<type> from
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ENGINE B<impl> and private key B<pkey>. B<ctx> must be initialized with
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EVP_MD_CTX_init() before calling this function. If B<pctx> is not NULL the
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ENGINE B<impl> and private key B<pkey>. B<ctx> must be created with
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EVP_MD_CTX_new() before calling this function. If B<pctx> is not NULL the
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EVP_PKEY_CTX of the signing operation will be written to B<*pctx>: this can
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be used to set alternative signing options.
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EVP_DigestSignUpdate() hashes B<cnt> bytes of data at B<d> into the
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signature context B<ctx>. This function can be called several times on the
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same B<ctx> to include additional data. This function is currently implemented
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usig a macro.
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using a macro.
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EVP_DigestSignFinal() signs the data in B<ctx> places the signature in B<sig>.
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If B<sig> is B<NULL> then the maximum size of the output buffer is written to
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@@ -42,7 +42,7 @@ EVP_DigestSignInit() EVP_DigestSignUpdate() and EVP_DigestSignaFinal() return
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value of -2 indicates the operation is not supported by the public key
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algorithm.
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The error codes can be obtained from L<ERR_get_error(3)|ERR_get_error(3)>.
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The error codes can be obtained from L<ERR_get_error(3)>.
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=head1 NOTES
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@@ -56,7 +56,7 @@ needed to be used to sign using SHA1 and DSA. This is no longer necessary and
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the use of clone digest is now discouraged.
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For some key types and parameters the random number generator must be seeded
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or the operation will fail.
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or the operation will fail.
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The call to EVP_DigestSignFinal() internally finalizes a copy of the digest
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context. This means that calls to EVP_DigestSignUpdate() and
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@@ -73,15 +73,24 @@ which indicates the maximum possible signature for any set of parameters.
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=head1 SEE ALSO
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L<EVP_DigestVerifyInit(3)|EVP_DigestVerifyInit(3)>,
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L<EVP_DigestInit(3)|EVP_DigestInit(3)>, L<err(3)|err(3)>,
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L<evp(3)|evp(3)>, L<hmac(3)|hmac(3)>, L<md2(3)|md2(3)>,
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L<md5(3)|md5(3)>, L<mdc2(3)|mdc2(3)>, L<ripemd(3)|ripemd(3)>,
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L<sha(3)|sha(3)>, L<dgst(1)|dgst(1)>
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L<EVP_DigestVerifyInit(3)>,
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L<EVP_DigestInit(3)>, L<err(3)>,
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L<evp(3)>, L<hmac(3)>, L<md2(3)>,
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L<md5(3)>, L<mdc2(3)>, L<ripemd(3)>,
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L<sha(3)>, L<dgst(1)>
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=head1 HISTORY
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EVP_DigestSignInit(), EVP_DigestSignUpdate() and EVP_DigestSignFinal()
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EVP_DigestSignInit(), EVP_DigestSignUpdate() and EVP_DigestSignFinal()
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were first added to OpenSSL 1.0.0.
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=head1 COPYRIGHT
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Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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