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Add docs noting requirements for SM2 signing 

Reviewed-by: Paul Yang <kaishen.yy@antfin.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23887)
This commit is contained in:
Neil Horman 2024-03-19 04:52:57 -04:00 committed by Tomas Mraz
parent d6a8adeccd
commit 4feb4a2b2c
1 changed files with 3 additions and 0 deletions
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3
doc/man7/EVP_PKEY-SM2.pod
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@ -38,6 +38,9 @@ Getter that returns the default digest name.
B<SM2> signatures can be generated by using the 'DigestSign' series of APIs, for
instance, EVP_DigestSignInit(), EVP_DigestSignUpdate() and EVP_DigestSignFinal().
Ditto for the verification process by calling the 'DigestVerify' series of APIs.
Note that the SM2 algorithm requires the presence of the public key for signatures,
as such the B<OSSL_PKEY_PARAM_PUB_KEY> option must be set on any key used in signature
generation.
Before computing an B<SM2> signature, an B<EVP_PKEY_CTX> needs to be created,
and an B<SM2> ID must be set for it, like this: