| EVP_BytesToKey.3 (127131) | EVP_BytesToKey.3 (142429) |
|---|---|
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| 139.\" 140.IX Title "EVP_BytesToKey 3" | 130.\" 131.IX Title "EVP_BytesToKey 3" |
| 141.TH EVP_BytesToKey 3 "0.9.7d" "2004-03-17" "OpenSSL" 142.UC | 132.TH EVP_BytesToKey 3 "2005-02-24" "0.9.7d" "OpenSSL" |
| 143.SH "NAME" 144EVP_BytesToKey \- password based encryption routine 145.SH "SYNOPSIS" 146.IX Header "SYNOPSIS" 147.Vb 1 148\& #include <openssl/evp.h> 149.Ve | 133.SH "NAME" 134EVP_BytesToKey \- password based encryption routine 135.SH "SYNOPSIS" 136.IX Header "SYNOPSIS" 137.Vb 1 138\& #include <openssl/evp.h> 139.Ve |
| 140.PP |
|
| 150.Vb 4 151\& int EVP_BytesToKey(const EVP_CIPHER *type,const EVP_MD *md, 152\& const unsigned char *salt, 153\& const unsigned char *data, int datal, int count, 154\& unsigned char *key,unsigned char *iv); 155.Ve 156.SH "DESCRIPTION" 157.IX Header "DESCRIPTION" --- 22 unchanged lines hidden (view full) --- 180.SH "KEY DERIVATION ALGORITHM" 181.IX Header "KEY DERIVATION ALGORITHM" 182The key and \s-1IV\s0 is derived by concatenating D_1, D_2, etc until 183enough data is available for the key and \s-1IV\s0. D_i is defined as: 184.PP 185.Vb 1 186\& D_i = HASH^count(D_(i-1) || data || salt) 187.Ve | 141.Vb 4 142\& int EVP_BytesToKey(const EVP_CIPHER *type,const EVP_MD *md, 143\& const unsigned char *salt, 144\& const unsigned char *data, int datal, int count, 145\& unsigned char *key,unsigned char *iv); 146.Ve 147.SH "DESCRIPTION" 148.IX Header "DESCRIPTION" --- 22 unchanged lines hidden (view full) --- 171.SH "KEY DERIVATION ALGORITHM" 172.IX Header "KEY DERIVATION ALGORITHM" 173The key and \s-1IV\s0 is derived by concatenating D_1, D_2, etc until 174enough data is available for the key and \s-1IV\s0. D_i is defined as: 175.PP 176.Vb 1 177\& D_i = HASH^count(D_(i-1) || data || salt) 178.Ve |
| 179.PP |
|
| 188where || denotes concatentaion, D_0 is empty, \s-1HASH\s0 is the digest | 180where || denotes concatentaion, D_0 is empty, \s-1HASH\s0 is the digest |
| 189algorithm in use, HASH^1(data) is simply HASH(data), HASH^2(data) 190is HASH(HASH(data)) and so on. | 181algorithm in use, HASH^1(data) is simply \s-1HASH\s0(data), HASH^2(data) 182is \s-1HASH\s0(\s-1HASH\s0(data)) and so on. |
| 191.PP 192The initial bytes are used for the key and the subsequent bytes for 193the \s-1IV\s0. 194.SH "RETURN VALUES" 195.IX Header "RETURN VALUES" 196\&\fIEVP_BytesToKey()\fR returns the size of the derived key in bytes. 197.SH "SEE ALSO" 198.IX Header "SEE ALSO" | 183.PP 184The initial bytes are used for the key and the subsequent bytes for 185the \s-1IV\s0. 186.SH "RETURN VALUES" 187.IX Header "RETURN VALUES" 188\&\fIEVP_BytesToKey()\fR returns the size of the derived key in bytes. 189.SH "SEE ALSO" 190.IX Header "SEE ALSO" |
| 199evp(3), rand(3), 200EVP_EncryptInit(3), | 191\&\fIevp\fR\|(3), \fIrand\fR\|(3), 192\&\fIEVP_EncryptInit\fR\|(3), |
| 201.SH "HISTORY" 202.IX Header "HISTORY" | 193.SH "HISTORY" 194.IX Header "HISTORY" |