| EVP_SignInit.3 (206048) | EVP_SignInit.3 (215698) |
|---|---|
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| 132.TH EVP_SignInit 3 "2010-03-24" "0.9.8n" "OpenSSL" | 127.TH EVP_SignInit 3 "2010-11-16" "0.9.8p" "OpenSSL" 128.\" For nroff, turn off justification. Always turn off hyphenation; it makes 129.\" way too many mistakes in technical documents. 130.if n .ad l 131.nh |
| 133.SH "NAME" 134EVP_SignInit, EVP_SignUpdate, EVP_SignFinal \- EVP signing functions 135.SH "SYNOPSIS" 136.IX Header "SYNOPSIS" 137.Vb 1 138\& #include <openssl/evp.h> | 132.SH "NAME" 133EVP_SignInit, EVP_SignUpdate, EVP_SignFinal \- EVP signing functions 134.SH "SYNOPSIS" 135.IX Header "SYNOPSIS" 136.Vb 1 137\& #include <openssl/evp.h> |
| 139.Ve 140.PP 141.Vb 3 | 138\& |
| 142\& int EVP_SignInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl); 143\& int EVP_SignUpdate(EVP_MD_CTX *ctx, const void *d, unsigned int cnt); 144\& int EVP_SignFinal(EVP_MD_CTX *ctx,unsigned char *sig,unsigned int *s, EVP_PKEY *pkey); | 139\& int EVP_SignInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl); 140\& int EVP_SignUpdate(EVP_MD_CTX *ctx, const void *d, unsigned int cnt); 141\& int EVP_SignFinal(EVP_MD_CTX *ctx,unsigned char *sig,unsigned int *s, EVP_PKEY *pkey); |
| 145.Ve 146.PP 147.Vb 1 | 142\& |
| 148\& void EVP_SignInit(EVP_MD_CTX *ctx, const EVP_MD *type); | 143\& void EVP_SignInit(EVP_MD_CTX *ctx, const EVP_MD *type); |
| 149.Ve 150.PP 151.Vb 1 | 144\& |
| 152\& int EVP_PKEY_size(EVP_PKEY *pkey); 153.Ve 154.SH "DESCRIPTION" 155.IX Header "DESCRIPTION" 156The \s-1EVP\s0 signature routines are a high level interface to digital 157signatures. 158.PP 159\&\fIEVP_SignInit_ex()\fR sets up signing context \fBctx\fR to use digest 160\&\fBtype\fR from \s-1ENGINE\s0 \fBimpl\fR. \fBctx\fR must be initialized with 161\&\fIEVP_MD_CTX_init()\fR before calling this function. 162.PP 163\&\fIEVP_SignUpdate()\fR hashes \fBcnt\fR bytes of data at \fBd\fR into the 164signature context \fBctx\fR. This function can be called several times on the 165same \fBctx\fR to include additional data. 166.PP 167\&\fIEVP_SignFinal()\fR signs the data in \fBctx\fR using the private key \fBpkey\fR and 168places the signature in \fBsig\fR. The number of bytes of data written (i.e. the 169length of the signature) will be written to the integer at \fBs\fR, at most | 145\& int EVP_PKEY_size(EVP_PKEY *pkey); 146.Ve 147.SH "DESCRIPTION" 148.IX Header "DESCRIPTION" 149The \s-1EVP\s0 signature routines are a high level interface to digital 150signatures. 151.PP 152\&\fIEVP_SignInit_ex()\fR sets up signing context \fBctx\fR to use digest 153\&\fBtype\fR from \s-1ENGINE\s0 \fBimpl\fR. \fBctx\fR must be initialized with 154\&\fIEVP_MD_CTX_init()\fR before calling this function. 155.PP 156\&\fIEVP_SignUpdate()\fR hashes \fBcnt\fR bytes of data at \fBd\fR into the 157signature context \fBctx\fR. This function can be called several times on the 158same \fBctx\fR to include additional data. 159.PP 160\&\fIEVP_SignFinal()\fR signs the data in \fBctx\fR using the private key \fBpkey\fR and 161places the signature in \fBsig\fR. The number of bytes of data written (i.e. the 162length of the signature) will be written to the integer at \fBs\fR, at most |
| 170EVP_PKEY_size(pkey) bytes will be written. | 163EVP_PKEY_size(pkey) bytes will be written. |
| 171.PP 172\&\fIEVP_SignInit()\fR initializes a signing context \fBctx\fR to use the default 173implementation of digest \fBtype\fR. 174.PP 175\&\fIEVP_PKEY_size()\fR returns the maximum size of a signature in bytes. The actual 176signature returned by \fIEVP_SignFinal()\fR may be smaller. 177.SH "RETURN VALUES" 178.IX Header "RETURN VALUES" --- 45 unchanged lines hidden --- | 164.PP 165\&\fIEVP_SignInit()\fR initializes a signing context \fBctx\fR to use the default 166implementation of digest \fBtype\fR. 167.PP 168\&\fIEVP_PKEY_size()\fR returns the maximum size of a signature in bytes. The actual 169signature returned by \fIEVP_SignFinal()\fR may be smaller. 170.SH "RETURN VALUES" 171.IX Header "RETURN VALUES" --- 45 unchanged lines hidden --- |