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Diffstat (limited to 'secure/lib/libcrypto/man/EVP_OpenInit.3')
-rw-r--r-- | secure/lib/libcrypto/man/EVP_OpenInit.3 | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/secure/lib/libcrypto/man/EVP_OpenInit.3 b/secure/lib/libcrypto/man/EVP_OpenInit.3 new file mode 100644 index 0000000..7540ef3 --- /dev/null +++ b/secure/lib/libcrypto/man/EVP_OpenInit.3 @@ -0,0 +1,186 @@ +.\" Automatically generated by Pod::Man 2.22 (Pod::Simple 3.07) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +EVP_OpenInit, EVP_OpenUpdate, EVP_OpenFinal \- EVP envelope decryption +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/evp.h> +\& +\& int EVP_OpenInit(EVP_CIPHER_CTX *ctx,EVP_CIPHER *type,unsigned char *ek, +\& int ekl,unsigned char *iv,EVP_PKEY *priv); +\& int EVP_OpenUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, +\& int *outl, unsigned char *in, int inl); +\& int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, +\& int *outl); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +The \s-1EVP\s0 envelope routines are a high level interface to envelope +decryption. They decrypt a public key encrypted symmetric key and +then decrypt data using it. +.PP +\&\fIEVP_OpenInit()\fR initializes a cipher context \fBctx\fR for decryption +with cipher \fBtype\fR. It decrypts the encrypted symmetric key of length +\&\fBekl\fR bytes passed in the \fBek\fR parameter using the private key \fBpriv\fR. +The \s-1IV\s0 is supplied in the \fBiv\fR parameter. +.PP +\&\fIEVP_OpenUpdate()\fR and \fIEVP_OpenFinal()\fR have exactly the same properties +as the \fIEVP_DecryptUpdate()\fR and \fIEVP_DecryptFinal()\fR routines, as +documented on the \fIEVP_EncryptInit\fR\|(3) manual +page. +.SH "NOTES" +.IX Header "NOTES" +It is possible to call \fIEVP_OpenInit()\fR twice in the same way as +\&\fIEVP_DecryptInit()\fR. The first call should have \fBpriv\fR set to \s-1NULL\s0 +and (after setting any cipher parameters) it should be called again +with \fBtype\fR set to \s-1NULL\s0. +.PP +If the cipher passed in the \fBtype\fR parameter is a variable length +cipher then the key length will be set to the value of the recovered +key length. If the cipher is a fixed length cipher then the recovered +key length must match the fixed cipher length. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fIEVP_OpenInit()\fR returns 0 on error or a non zero integer (actually the +recovered secret key size) if successful. +.PP +\&\fIEVP_OpenUpdate()\fR returns 1 for success or 0 for failure. +.PP +\&\fIEVP_OpenFinal()\fR returns 0 if the decrypt failed or 1 for success. +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fIevp\fR\|(3), \fIrand\fR\|(3), +\&\fIEVP_EncryptInit\fR\|(3), +\&\fIEVP_SealInit\fR\|(3) +.SH "HISTORY" +.IX Header "HISTORY" |