.TH "EVP generic crypto functions" 3 "11 Jan 2012" "Version 1.5.2" "Heimdal crypto library" \" -*- nroff -*-
.ad l
.nh
.SH NAME
EVP generic crypto functions \- 
.SS "Functions"

.in +1c
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_wincrypt_des_ede3_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_aes_128_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_aes_192_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_aes_256_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_aes_128_cfb8\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_aes_192_cfb8\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_aes_256_cfb8\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_hcrypto_sha256\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_hcrypto_sha384\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_hcrypto_sha512\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_hcrypto_sha1\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_hcrypto_md5\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_hcrypto_md4\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_hcrypto_md2\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_des_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_des_ede3_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_rc2_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_rc2_40_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_rc2_64_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_camellia_128_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_camellia_192_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_hcrypto_camellia_256_cbc\fP (void)"
.br
.ti -1c
.RI "size_t \fBEVP_MD_size\fP (const EVP_MD *md)"
.br
.ti -1c
.RI "size_t \fBEVP_MD_block_size\fP (const EVP_MD *md)"
.br
.ti -1c
.RI "EVP_MD_CTX * \fBEVP_MD_CTX_create\fP (void)"
.br
.ti -1c
.RI "void \fBEVP_MD_CTX_init\fP (EVP_MD_CTX *ctx) HC_DEPRECATED"
.br
.ti -1c
.RI "void \fBEVP_MD_CTX_destroy\fP (EVP_MD_CTX *ctx)"
.br
.ti -1c
.RI "int \fBEVP_MD_CTX_cleanup\fP (EVP_MD_CTX *ctx) HC_DEPRECATED"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_MD_CTX_md\fP (EVP_MD_CTX *ctx)"
.br
.ti -1c
.RI "size_t \fBEVP_MD_CTX_size\fP (EVP_MD_CTX *ctx)"
.br
.ti -1c
.RI "size_t \fBEVP_MD_CTX_block_size\fP (EVP_MD_CTX *ctx)"
.br
.ti -1c
.RI "int \fBEVP_DigestInit_ex\fP (EVP_MD_CTX *ctx, const EVP_MD *md, ENGINE *engine)"
.br
.ti -1c
.RI "int \fBEVP_DigestUpdate\fP (EVP_MD_CTX *ctx, const void *data, size_t size)"
.br
.ti -1c
.RI "int \fBEVP_DigestFinal_ex\fP (EVP_MD_CTX *ctx, void *hash, unsigned int *size)"
.br
.ti -1c
.RI "int \fBEVP_Digest\fP (const void *data, size_t dsize, void *hash, unsigned int *hsize, const EVP_MD *md, ENGINE *engine)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_sha256\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_sha384\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_sha512\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_sha1\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_sha\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_md5\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_md4\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_md2\fP (void)"
.br
.ti -1c
.RI "const EVP_MD * \fBEVP_md_null\fP (void)"
.br
.ti -1c
.RI "size_t \fBEVP_CIPHER_block_size\fP (const EVP_CIPHER *c)"
.br
.ti -1c
.RI "size_t \fBEVP_CIPHER_key_length\fP (const EVP_CIPHER *c)"
.br
.ti -1c
.RI "size_t \fBEVP_CIPHER_iv_length\fP (const EVP_CIPHER *c)"
.br
.ti -1c
.RI "void \fBEVP_CIPHER_CTX_init\fP (EVP_CIPHER_CTX *c)"
.br
.ti -1c
.RI "int \fBEVP_CIPHER_CTX_cleanup\fP (EVP_CIPHER_CTX *c)"
.br
.ti -1c
.RI "int \fBEVP_CIPHER_CTX_set_key_length\fP (EVP_CIPHER_CTX *c, int length)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_CIPHER_CTX_cipher\fP (EVP_CIPHER_CTX *ctx)"
.br
.ti -1c
.RI "size_t \fBEVP_CIPHER_CTX_block_size\fP (const EVP_CIPHER_CTX *ctx)"
.br
.ti -1c
.RI "size_t \fBEVP_CIPHER_CTX_key_length\fP (const EVP_CIPHER_CTX *ctx)"
.br
.ti -1c
.RI "size_t \fBEVP_CIPHER_CTX_iv_length\fP (const EVP_CIPHER_CTX *ctx)"
.br
.ti -1c
.RI "unsigned long \fBEVP_CIPHER_CTX_flags\fP (const EVP_CIPHER_CTX *ctx)"
.br
.ti -1c
.RI "int \fBEVP_CIPHER_CTX_mode\fP (const EVP_CIPHER_CTX *ctx)"
.br
.ti -1c
.RI "void * \fBEVP_CIPHER_CTX_get_app_data\fP (EVP_CIPHER_CTX *ctx)"
.br
.ti -1c
.RI "void \fBEVP_CIPHER_CTX_set_app_data\fP (EVP_CIPHER_CTX *ctx, void *data)"
.br
.ti -1c
.RI "int \fBEVP_CipherInit_ex\fP (EVP_CIPHER_CTX *ctx, const EVP_CIPHER *c, ENGINE *engine, const void *key, const void *iv, int encp)"
.br
.ti -1c
.RI "int \fBEVP_CipherUpdate\fP (EVP_CIPHER_CTX *ctx, void *out, int *outlen, void *in, size_t inlen)"
.br
.ti -1c
.RI "int \fBEVP_CipherFinal_ex\fP (EVP_CIPHER_CTX *ctx, void *out, int *outlen)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_enc_null\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_rc2_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_rc2_40_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_rc2_64_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_rc4\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_rc4_40\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_des_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_des_ede3_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_aes_128_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_aes_192_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_aes_256_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_aes_128_cfb8\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_aes_192_cfb8\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_aes_256_cfb8\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_camellia_128_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_camellia_192_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_camellia_256_cbc\fP (void)"
.br
.ti -1c
.RI "const EVP_CIPHER * \fBEVP_get_cipherbyname\fP (const char *name)"
.br
.ti -1c
.RI "int \fBEVP_BytesToKey\fP (const EVP_CIPHER *type, const EVP_MD *md, const void *salt, const void *data, size_t datalen, unsigned int count, void *keydata, void *ivdata)"
.br
.in -1c
.SH "Detailed Description"
.PP 
See the \fBEVP - generic crypto interface\fP for description and examples. 
.SH "Function Documentation"
.PP 
.SS "const EVP_CIPHER* EVP_aes_128_cbc (void)"
.PP
The AES-128 cipher type
.PP
\fBReturns:\fP
.RS 4
the AES-128 EVP_CIPHER pointer. 
.RE
.PP

.PP
\fBExamples: \fP
.in +1c
\fBexample_evp_cipher.c\fP.
.SS "const EVP_CIPHER* EVP_aes_128_cfb8 (void)"
.PP
The AES-128 cipher type
.PP
\fBReturns:\fP
.RS 4
the AES-128 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_aes_192_cbc (void)"
.PP
The AES-192 cipher type
.PP
\fBReturns:\fP
.RS 4
the AES-192 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_aes_192_cfb8 (void)"
.PP
The AES-192 cipher type
.PP
\fBReturns:\fP
.RS 4
the AES-192 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_aes_256_cbc (void)"
.PP
The AES-256 cipher type
.PP
\fBReturns:\fP
.RS 4
the AES-256 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_aes_256_cfb8 (void)"
.PP
The AES-256 cipher type
.PP
\fBReturns:\fP
.RS 4
the AES-256 EVP_CIPHER pointer. 
.RE
.PP

.SS "int EVP_BytesToKey (const EVP_CIPHER * type, const EVP_MD * md, const void * salt, const void * data, size_t datalen, unsigned int count, void * keydata, void * ivdata)"
.PP
Provides a legancy string to key function, used in PEM files.
.PP
New protocols should use new string to key functions like NIST SP56-800A or PKCS#5 v2.0 (see \fBPKCS5_PBKDF2_HMAC_SHA1()\fP).
.PP
\fBParameters:\fP
.RS 4
\fItype\fP type of cipher to use 
.br
\fImd\fP message digest to use 
.br
\fIsalt\fP salt salt string, should be an binary 8 byte buffer. 
.br
\fIdata\fP the password/input key string. 
.br
\fIdatalen\fP length of data parameter. 
.br
\fIcount\fP iteration counter. 
.br
\fIkeydata\fP output keydata, needs to of the size \fBEVP_CIPHER_key_length()\fP. 
.br
\fIivdata\fP output ivdata, needs to of the size \fBEVP_CIPHER_block_size()\fP.
.RE
.PP
\fBReturns:\fP
.RS 4
the size of derived key. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_camellia_128_cbc (void)"
.PP
The Camellia-128 cipher type
.PP
\fBReturns:\fP
.RS 4
the Camellia-128 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_camellia_192_cbc (void)"
.PP
The Camellia-198 cipher type
.PP
\fBReturns:\fP
.RS 4
the Camellia-198 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_camellia_256_cbc (void)"
.PP
The Camellia-256 cipher type
.PP
\fBReturns:\fP
.RS 4
the Camellia-256 EVP_CIPHER pointer. 
.RE
.PP

.SS "size_t EVP_CIPHER_block_size (const EVP_CIPHER * c)"
.PP
Return the block size of the cipher.
.PP
\fBParameters:\fP
.RS 4
\fIc\fP cipher to get the block size from.
.RE
.PP
\fBReturns:\fP
.RS 4
the block size of the cipher. 
.RE
.PP

.PP
\fBExamples: \fP
.in +1c
\fBexample_evp_cipher.c\fP.
.SS "size_t EVP_CIPHER_CTX_block_size (const EVP_CIPHER_CTX * ctx)"
.PP
Return the block size of the cipher context.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP cipher context to get the block size from.
.RE
.PP
\fBReturns:\fP
.RS 4
the block size of the cipher context. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_CIPHER_CTX_cipher (EVP_CIPHER_CTX * ctx)"
.PP
Return the EVP_CIPHER for a EVP_CIPHER_CTX context.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the context to get the cipher type from.
.RE
.PP
\fBReturns:\fP
.RS 4
the EVP_CIPHER pointer. 
.RE
.PP

.SS "int EVP_CIPHER_CTX_cleanup (EVP_CIPHER_CTX * c)"
.PP
Clean up the EVP_CIPHER_CTX context.
.PP
\fBParameters:\fP
.RS 4
\fIc\fP the cipher to clean up.
.RE
.PP
\fBReturns:\fP
.RS 4
1 on success. 
.RE
.PP

.PP
\fBExamples: \fP
.in +1c
\fBexample_evp_cipher.c\fP.
.SS "unsigned long EVP_CIPHER_CTX_flags (const EVP_CIPHER_CTX * ctx)"
.PP
Get the flags for an EVP_CIPHER_CTX context.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the EVP_CIPHER_CTX to get the flags from
.RE
.PP
\fBReturns:\fP
.RS 4
the flags for an EVP_CIPHER_CTX. 
.RE
.PP

.SS "void* EVP_CIPHER_CTX_get_app_data (EVP_CIPHER_CTX * ctx)"
.PP
Get the app data for an EVP_CIPHER_CTX context.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the EVP_CIPHER_CTX to get the app data from
.RE
.PP
\fBReturns:\fP
.RS 4
the app data for an EVP_CIPHER_CTX. 
.RE
.PP

.SS "void EVP_CIPHER_CTX_init (EVP_CIPHER_CTX * c)"
.PP
Initiate a EVP_CIPHER_CTX context. Clean up with \fBEVP_CIPHER_CTX_cleanup()\fP.
.PP
\fBParameters:\fP
.RS 4
\fIc\fP the cipher initiate. 
.RE
.PP

.PP
\fBExamples: \fP
.in +1c
\fBexample_evp_cipher.c\fP.
.SS "size_t EVP_CIPHER_CTX_iv_length (const EVP_CIPHER_CTX * ctx)"
.PP
Return the IV size of the cipher context.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP cipher context to get the IV size from.
.RE
.PP
\fBReturns:\fP
.RS 4
the IV size of the cipher context. 
.RE
.PP

.SS "size_t EVP_CIPHER_CTX_key_length (const EVP_CIPHER_CTX * ctx)"
.PP
Return the key size of the cipher context.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP cipher context to get the key size from.
.RE
.PP
\fBReturns:\fP
.RS 4
the key size of the cipher context. 
.RE
.PP

.SS "int EVP_CIPHER_CTX_mode (const EVP_CIPHER_CTX * ctx)"
.PP
Get the mode for an EVP_CIPHER_CTX context.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the EVP_CIPHER_CTX to get the mode from
.RE
.PP
\fBReturns:\fP
.RS 4
the mode for an EVP_CIPHER_CTX. 
.RE
.PP

.SS "void EVP_CIPHER_CTX_set_app_data (EVP_CIPHER_CTX * ctx, void * data)"
.PP
Set the app data for an EVP_CIPHER_CTX context.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the EVP_CIPHER_CTX to set the app data for 
.br
\fIdata\fP the app data to set for an EVP_CIPHER_CTX. 
.RE
.PP

.SS "int EVP_CIPHER_CTX_set_key_length (EVP_CIPHER_CTX * c, int length)"
.PP
If the cipher type supports it, change the key length
.PP
\fBParameters:\fP
.RS 4
\fIc\fP the cipher context to change the key length for 
.br
\fIlength\fP new key length
.RE
.PP
\fBReturns:\fP
.RS 4
1 on success. 
.RE
.PP

.SS "size_t EVP_CIPHER_iv_length (const EVP_CIPHER * c)"
.PP
Return the IV size of the cipher.
.PP
\fBParameters:\fP
.RS 4
\fIc\fP cipher to get the IV size from.
.RE
.PP
\fBReturns:\fP
.RS 4
the IV size of the cipher. 
.RE
.PP

.PP
\fBExamples: \fP
.in +1c
\fBexample_evp_cipher.c\fP.
.SS "size_t EVP_CIPHER_key_length (const EVP_CIPHER * c)"
.PP
Return the key size of the cipher.
.PP
\fBParameters:\fP
.RS 4
\fIc\fP cipher to get the key size from.
.RE
.PP
\fBReturns:\fP
.RS 4
the key size of the cipher. 
.RE
.PP

.PP
\fBExamples: \fP
.in +1c
\fBexample_evp_cipher.c\fP.
.SS "int EVP_CipherFinal_ex (EVP_CIPHER_CTX * ctx, void * out, int * outlen)"
.PP
Encipher/decipher final data
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the cipher context. 
.br
\fIout\fP output data from the operation. 
.br
\fIoutlen\fP output length
.RE
.PP
The input length needs to be at least \fBEVP_CIPHER_block_size()\fP bytes long.
.PP
See \fBEVP Cipher\fP for an example how to use this function.
.PP
\fBReturns:\fP
.RS 4
1 on success. 
.RE
.PP

.PP
\fBExamples: \fP
.in +1c
\fBexample_evp_cipher.c\fP.
.SS "int EVP_CipherInit_ex (EVP_CIPHER_CTX * ctx, const EVP_CIPHER * c, ENGINE * engine, const void * key, const void * iv, int encp)"
.PP
Initiate the EVP_CIPHER_CTX context to encrypt or decrypt data. Clean up with \fBEVP_CIPHER_CTX_cleanup()\fP.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP context to initiate 
.br
\fIc\fP cipher to use. 
.br
\fIengine\fP crypto engine to use, NULL to select default. 
.br
\fIkey\fP the crypto key to use, NULL will use the previous value. 
.br
\fIiv\fP the IV to use, NULL will use the previous value. 
.br
\fIencp\fP non zero will encrypt, -1 use the previous value.
.RE
.PP
\fBReturns:\fP
.RS 4
1 on success. 
.RE
.PP

.PP
\fBExamples: \fP
.in +1c
\fBexample_evp_cipher.c\fP.
.SS "int EVP_CipherUpdate (EVP_CIPHER_CTX * ctx, void * out, int * outlen, void * in, size_t inlen)"
.PP
Encipher/decipher partial data
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the cipher context. 
.br
\fIout\fP output data from the operation. 
.br
\fIoutlen\fP output length 
.br
\fIin\fP input data to the operation. 
.br
\fIinlen\fP length of data.
.RE
.PP
The output buffer length should at least be \fBEVP_CIPHER_block_size()\fP byte longer then the input length.
.PP
See \fBEVP Cipher\fP for an example how to use this function.
.PP
\fBReturns:\fP
.RS 4
1 on success. 
.RE
.PP

.PP
If there in no spare bytes in the left from last Update and the input length is on the block boundery, the \fBEVP_CipherUpdate()\fP function can take a shortcut (and preformance gain) and directly encrypt the data, otherwise we hav to fix it up and store extra it the EVP_CIPHER_CTX. 
.PP
\fBExamples: \fP
.in +1c
\fBexample_evp_cipher.c\fP.
.SS "const EVP_CIPHER* EVP_des_cbc (void)"
.PP
The DES cipher type
.PP
\fBReturns:\fP
.RS 4
the DES-CBC EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_des_ede3_cbc (void)"
.PP
The tripple DES cipher type
.PP
\fBReturns:\fP
.RS 4
the DES-EDE3-CBC EVP_CIPHER pointer. 
.RE
.PP

.SS "int EVP_Digest (const void * data, size_t dsize, void * hash, unsigned int * hsize, const EVP_MD * md, ENGINE * engine)"
.PP
Do the whole \fBEVP_MD_CTX_create()\fP, \fBEVP_DigestInit_ex()\fP, \fBEVP_DigestUpdate()\fP, \fBEVP_DigestFinal_ex()\fP, \fBEVP_MD_CTX_destroy()\fP dance in one call.
.PP
\fBParameters:\fP
.RS 4
\fIdata\fP the data to update the context with 
.br
\fIdsize\fP length of data 
.br
\fIhash\fP output data of at least \fBEVP_MD_size()\fP length. 
.br
\fIhsize\fP output length of hash. 
.br
\fImd\fP message digest to use 
.br
\fIengine\fP engine to use, NULL for default engine.
.RE
.PP
\fBReturns:\fP
.RS 4
1 on success. 
.RE
.PP

.SS "int EVP_DigestFinal_ex (EVP_MD_CTX * ctx, void * hash, unsigned int * size)"
.PP
Complete the message digest.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the context to complete. 
.br
\fIhash\fP the output of the message digest function. At least \fBEVP_MD_size()\fP. 
.br
\fIsize\fP the output size of hash.
.RE
.PP
\fBReturns:\fP
.RS 4
1 on success. 
.RE
.PP

.SS "int EVP_DigestInit_ex (EVP_MD_CTX * ctx, const EVP_MD * md, ENGINE * engine)"
.PP
Init a EVP_MD_CTX for use a specific message digest and engine.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the message digest context to init. 
.br
\fImd\fP the message digest to use. 
.br
\fIengine\fP the engine to use, NULL to use the default engine.
.RE
.PP
\fBReturns:\fP
.RS 4
1 on success. 
.RE
.PP

.SS "int EVP_DigestUpdate (EVP_MD_CTX * ctx, const void * data, size_t size)"
.PP
Update the digest with some data.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the context to update 
.br
\fIdata\fP the data to update the context with 
.br
\fIsize\fP length of data
.RE
.PP
\fBReturns:\fP
.RS 4
1 on success. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_enc_null (void)"
.PP
The NULL cipher type, does no encryption/decryption.
.PP
\fBReturns:\fP
.RS 4
the null EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_get_cipherbyname (const char * name)"
.PP
Get the cipher type using their name.
.PP
\fBParameters:\fP
.RS 4
\fIname\fP the name of the cipher.
.RE
.PP
\fBReturns:\fP
.RS 4
the selected EVP_CIPHER pointer or NULL if not found. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_aes_128_cbc (void)"
.PP
The AES-128 cipher type (hcrypto)
.PP
\fBReturns:\fP
.RS 4
the AES-128 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_aes_128_cfb8 (void)"
.PP
The AES-128 CFB8 cipher type (hcrypto)
.PP
\fBReturns:\fP
.RS 4
the AES-128 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_aes_192_cbc (void)"
.PP
The AES-192 cipher type (hcrypto)
.PP
\fBReturns:\fP
.RS 4
the AES-192 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_aes_192_cfb8 (void)"
.PP
The AES-192 CFB8 cipher type (hcrypto)
.PP
\fBReturns:\fP
.RS 4
the AES-192 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_aes_256_cbc (void)"
.PP
The AES-256 cipher type (hcrypto)
.PP
\fBReturns:\fP
.RS 4
the AES-256 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_aes_256_cfb8 (void)"
.PP
The AES-256 CFB8 cipher type (hcrypto)
.PP
\fBReturns:\fP
.RS 4
the AES-256 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_camellia_128_cbc (void)"
.PP
The Camellia-128 cipher type - hcrypto
.PP
\fBReturns:\fP
.RS 4
the Camellia-128 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_camellia_192_cbc (void)"
.PP
The Camellia-198 cipher type - hcrypto
.PP
\fBReturns:\fP
.RS 4
the Camellia-198 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_camellia_256_cbc (void)"
.PP
The Camellia-256 cipher type - hcrypto
.PP
\fBReturns:\fP
.RS 4
the Camellia-256 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_des_cbc (void)"
.PP
The DES cipher type
.PP
\fBReturns:\fP
.RS 4
the DES-CBC EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_des_ede3_cbc (void)"
.PP
The tripple DES cipher type - hcrypto
.PP
\fBReturns:\fP
.RS 4
the DES-EDE3-CBC EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_MD* EVP_hcrypto_md2 (void)"
.PP
The message digest MD2 - hcrypto
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_hcrypto_md4 (void)"
.PP
The message digest MD4 - hcrypto
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_hcrypto_md5 (void)"
.PP
The message digest MD5 - hcrypto
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_rc2_40_cbc (void)"
.PP
The RC2-40 cipher type
.PP
\fBReturns:\fP
.RS 4
the RC2-40 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_rc2_64_cbc (void)"
.PP
The RC2-64 cipher type
.PP
\fBReturns:\fP
.RS 4
the RC2-64 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_hcrypto_rc2_cbc (void)"
.PP
The RC2 cipher type - hcrypto
.PP
\fBReturns:\fP
.RS 4
the RC2 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_MD* EVP_hcrypto_sha1 (void)"
.PP
The message digest SHA1 - hcrypto
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_hcrypto_sha256 (void)"
.PP
The message digest SHA256 - hcrypto
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_hcrypto_sha384 (void)"
.PP
The message digest SHA384 - hcrypto
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_hcrypto_sha512 (void)"
.PP
The message digest SHA512 - hcrypto
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_md2 (void)"
.PP
The message digest MD2
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_md4 (void)"
.PP
The message digest MD4
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_md5 (void)"
.PP
The message digest MD5
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "size_t EVP_MD_block_size (const EVP_MD * md)"
.PP
Return the blocksize of the message digest function.
.PP
\fBParameters:\fP
.RS 4
\fImd\fP the evp message
.RE
.PP
\fBReturns:\fP
.RS 4
size size of the message digest block size 
.RE
.PP

.SS "size_t EVP_MD_CTX_block_size (EVP_MD_CTX * ctx)"
.PP
Return the blocksize of the message digest function.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the evp message digest context
.RE
.PP
\fBReturns:\fP
.RS 4
size size of the message digest block size 
.RE
.PP

.SS "int EVP_MD_CTX_cleanup (EVP_MD_CTX * ctx)"
.PP
Free the resources used by the EVP_MD context.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the context to free the resources from.
.RE
.PP
\fBReturns:\fP
.RS 4
1 on success. 
.RE
.PP

.SS "EVP_MD_CTX* EVP_MD_CTX_create (void)"
.PP
Allocate a message digest context object. Free with \fBEVP_MD_CTX_destroy()\fP.
.PP
\fBReturns:\fP
.RS 4
a newly allocated message digest context object. 
.RE
.PP

.SS "void EVP_MD_CTX_destroy (EVP_MD_CTX * ctx)"
.PP
Free a message digest context object.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP context to free. 
.RE
.PP

.SS "void EVP_MD_CTX_init (EVP_MD_CTX * ctx)"
.PP
Initiate a message digest context object. Deallocate with \fBEVP_MD_CTX_cleanup()\fP. Please use \fBEVP_MD_CTX_create()\fP instead.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP variable to initiate. 
.RE
.PP

.SS "const EVP_MD* EVP_MD_CTX_md (EVP_MD_CTX * ctx)"
.PP
Get the EVP_MD use for a specified context.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the EVP_MD context to get the EVP_MD for.
.RE
.PP
\fBReturns:\fP
.RS 4
the EVP_MD used for the context. 
.RE
.PP

.SS "size_t EVP_MD_CTX_size (EVP_MD_CTX * ctx)"
.PP
Return the output size of the message digest function.
.PP
\fBParameters:\fP
.RS 4
\fIctx\fP the evp message digest context
.RE
.PP
\fBReturns:\fP
.RS 4
size output size of the message digest function. 
.RE
.PP

.SS "const EVP_MD* EVP_md_null (void)"
.PP
The null message digest
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "size_t EVP_MD_size (const EVP_MD * md)"
.PP
Return the output size of the message digest function.
.PP
\fBParameters:\fP
.RS 4
\fImd\fP the evp message
.RE
.PP
\fBReturns:\fP
.RS 4
size output size of the message digest function. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_rc2_40_cbc (void)"
.PP
The RC2 cipher type
.PP
\fBReturns:\fP
.RS 4
the RC2 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_rc2_64_cbc (void)"
.PP
The RC2 cipher type
.PP
\fBReturns:\fP
.RS 4
the RC2 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_rc2_cbc (void)"
.PP
The RC2 cipher type
.PP
\fBReturns:\fP
.RS 4
the RC2 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_rc4 (void)"
.PP
The RC4 cipher type
.PP
\fBReturns:\fP
.RS 4
the RC4 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_rc4_40 (void)"
.PP
The RC4-40 cipher type
.PP
\fBReturns:\fP
.RS 4
the RC4-40 EVP_CIPHER pointer. 
.RE
.PP

.SS "const EVP_MD* EVP_sha (void)"
.PP
The message digest SHA1
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_sha1 (void)"
.PP
The message digest SHA1
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_sha256 (void)"
.PP
The message digest SHA256
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_sha384 (void)"
.PP
The message digest SHA384
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_MD* EVP_sha512 (void)"
.PP
The message digest SHA512
.PP
\fBReturns:\fP
.RS 4
the message digest type. 
.RE
.PP

.SS "const EVP_CIPHER* EVP_wincrypt_des_ede3_cbc (void)"
.PP
The tripple DES cipher type (Micrsoft crypt provider)
.PP
\fBReturns:\fP
.RS 4
the DES-EDE3-CBC EVP_CIPHER pointer. 
.RE
.PP