instead of initializing and cleaning it up on each call and allow non default
implementations of digests to be specified.
-If digest contexts are not cleaned up after use
+If digest contexts are not cleaned up after use,
memory leaks will occur.
EVP_MD_CTX_size(), EVP_MD_CTX_block_size(), EVP_MD_CTX_type(),
Only EVP_PKEY types that support signing can be used with these functions. This
includes MAC algorithms where the MAC generation is considered as a form of
-"signing." Built-in EVP_PKEY types supported by these functions are CMAC,
+"signing". Built-in EVP_PKEY types supported by these functions are CMAC,
Poly1305, DSA, ECDSA, HMAC, RSA, SipHash, Ed25519 and Ed448.
Not all digests can be used for all key types. The following combinations apply.
same B<ctx> to include additional data. This function is currently implemented
using a macro.
-EVP_DigestSignFinal() signs the data in B<ctx> places the signature in B<sig>.
+EVP_DigestSignFinal() signs the data in B<ctx> and places the signature in B<sig>.
If B<sig> is B<NULL> then the maximum size of the output buffer is written to
the B<siglen> parameter. If B<sig> is not B<NULL> then before the call the
-B<siglen> parameter should contain the length of the B<sig> buffer, if the
+B<siglen> parameter should contain the length of the B<sig> buffer. If the
call is successful the signature is written to B<sig> and the amount of data
written to B<siglen>.
EVP_DigestSignInit(), EVP_DigestSignUpdate(), EVP_DigestSignaFinal() and
EVP_DigestSign() return 1 for success and 0 or a negative value for failure. In
-particular a return value of -2 indicates the operation is not supported by the
+particular, a return value of -2 indicates the operation is not supported by the
public key algorithm.
The error codes can be obtained from L<ERR_get_error(3)>.
context. This means that calls to EVP_DigestSignUpdate() and
EVP_DigestSignFinal() can be called later to digest and sign additional data.
-Since only a copy of the digest context is ever finalized the context must
+Since only a copy of the digest context is ever finalized, the context must
be cleaned up after use by calling EVP_MD_CTX_free() or a memory leak
will occur.
context. This means that EVP_VerifyUpdate() and EVP_VerifyFinal() can
be called later to digest and verify additional data.
-Since only a copy of the digest context is ever finalized the context must
+Since only a copy of the digest context is ever finalized, the context must
be cleaned up after use by calling EVP_MD_CTX_free() or a memory leak
will occur.
EVP_DigestSign() and EVP_DigestVerify() functions.
When calling EVP_DigestSignInit() or EVP_DigestVerifyInit(), the
-digest parameter B<MUST> be set to B<NULL>.
+digest B<type> parameter B<MUST> be set to B<NULL>.
Applications wishing to sign certificates (or other structures such as
CRLs or certificate requests) using Ed25519 or Ed448 can either use X509_sign()