| EVP_BytesToKey.3 (279264) | EVP_BytesToKey.3 (273399) |
|---|---|
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| 136.TH EVP_BytesToKey 3 "2015-01-15" "1.0.1l" "OpenSSL" | 127.TH EVP_BytesToKey 3 "2014-10-15" "1.0.1j" "OpenSSL" |
| 137.\" For nroff, turn off justification. Always turn off hyphenation; it makes 138.\" way too many mistakes in technical documents. 139.if n .ad l 140.nh 141.SH "NAME" 142EVP_BytesToKey \- password based encryption routine 143.SH "SYNOPSIS" 144.IX Header "SYNOPSIS" --- 27 unchanged lines hidden (view full) --- 172\&\fB\s-1MD5\s0\fR is used then the derivation algorithm is compatible with PKCS#5 v1.5 173otherwise a non standard extension is used to derive the extra data. 174.PP 175Newer applications should use more standard algorithms such as PKCS#5 176v2.0 for key derivation. 177.SH "KEY DERIVATION ALGORITHM" 178.IX Header "KEY DERIVATION ALGORITHM" 179The key and \s-1IV\s0 is derived by concatenating D_1, D_2, etc until | 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 132.SH "NAME" 133EVP_BytesToKey \- password based encryption routine 134.SH "SYNOPSIS" 135.IX Header "SYNOPSIS" --- 27 unchanged lines hidden (view full) --- 163\&\fB\s-1MD5\s0\fR is used then the derivation algorithm is compatible with PKCS#5 v1.5 164otherwise a non standard extension is used to derive the extra data. 165.PP 166Newer applications should use more standard algorithms such as PKCS#5 167v2.0 for key derivation. 168.SH "KEY DERIVATION ALGORITHM" 169.IX Header "KEY DERIVATION ALGORITHM" 170The key and \s-1IV\s0 is derived by concatenating D_1, D_2, etc until |
| 180enough data is available for the key and \s-1IV.\s0 D_i is defined as: | 171enough data is available for the key and \s-1IV\s0. D_i is defined as: |
| 181.PP 182.Vb 1 183\& D_i = HASH^count(D_(i\-1) || data || salt) 184.Ve 185.PP 186where || denotes concatentaion, D_0 is empty, \s-1HASH\s0 is the digest 187algorithm in use, HASH^1(data) is simply \s-1HASH\s0(data), HASH^2(data) 188is \s-1HASH\s0(\s-1HASH\s0(data)) and so on. 189.PP 190The initial bytes are used for the key and the subsequent bytes for | 172.PP 173.Vb 1 174\& D_i = HASH^count(D_(i\-1) || data || salt) 175.Ve 176.PP 177where || denotes concatentaion, D_0 is empty, \s-1HASH\s0 is the digest 178algorithm in use, HASH^1(data) is simply \s-1HASH\s0(data), HASH^2(data) 179is \s-1HASH\s0(\s-1HASH\s0(data)) and so on. 180.PP 181The initial bytes are used for the key and the subsequent bytes for |
| 191the \s-1IV.\s0 | 182the \s-1IV\s0. |
| 192.SH "RETURN VALUES" 193.IX Header "RETURN VALUES" 194\&\fIEVP_BytesToKey()\fR returns the size of the derived key in bytes. 195.SH "SEE ALSO" 196.IX Header "SEE ALSO" 197\&\fIevp\fR\|(3), \fIrand\fR\|(3), 198\&\fIEVP_EncryptInit\fR\|(3) 199.SH "HISTORY" 200.IX Header "HISTORY" | 183.SH "RETURN VALUES" 184.IX Header "RETURN VALUES" 185\&\fIEVP_BytesToKey()\fR returns the size of the derived key in bytes. 186.SH "SEE ALSO" 187.IX Header "SEE ALSO" 188\&\fIevp\fR\|(3), \fIrand\fR\|(3), 189\&\fIEVP_EncryptInit\fR\|(3) 190.SH "HISTORY" 191.IX Header "HISTORY" |