/* crypto/evp/evp_enc.c */
-/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
#include <stdio.h>
#include "cryptlib.h"
-#include "evp.h"
+#include <openssl/evp.h>
+#include <openssl/err.h>
+#include "evp_locl.h"
-char *EVP_version="EVP part of SSLeay 0.8.1b 29-Jun-1998";
+const char *EVP_version="EVP" OPENSSL_VERSION_PTEXT;
-void EVP_CipherInit(ctx,data,key,iv,enc)
-EVP_CIPHER_CTX *ctx;
-EVP_CIPHER *data;
-unsigned char *key;
-unsigned char *iv;
-int enc;
+void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx)
{
- if (enc)
- EVP_EncryptInit(ctx,data,key,iv);
- else
- EVP_DecryptInit(ctx,data,key,iv);
+ memset(ctx,0,sizeof(EVP_CIPHER_CTX));
+ /* ctx->cipher=NULL; */
}
-void EVP_CipherUpdate(ctx,out,outl,in,inl)
-EVP_CIPHER_CTX *ctx;
-unsigned char *out;
-int *outl;
-unsigned char *in;
-int inl;
+int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+ unsigned char *key, unsigned char *iv, int enc)
+ {
+ if(enc && (enc != -1)) enc = 1;
+ if (cipher) {
+ ctx->cipher=cipher;
+ ctx->key_len = cipher->key_len;
+ ctx->flags = 0;
+ if(ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
+ if(!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
+ EVPerr(EVP_F_EVP_CIPHERINIT, EVP_R_INITIALIZATION_ERROR);
+ return 0;
+ }
+ }
+ } else if(!ctx->cipher) {
+ EVPerr(EVP_F_EVP_CIPHERINIT, EVP_R_NO_CIPHER_SET);
+ return 0;
+ }
+ if(!(EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
+ switch(EVP_CIPHER_CTX_mode(ctx)) {
+
+ case EVP_CIPH_STREAM_CIPHER:
+ case EVP_CIPH_ECB_MODE:
+ break;
+
+ case EVP_CIPH_CFB_MODE:
+ case EVP_CIPH_OFB_MODE:
+
+ ctx->num = 0;
+
+ case EVP_CIPH_CBC_MODE:
+
+ if(iv) memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
+ memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
+ break;
+
+ default:
+ return 0;
+ break;
+ }
+ }
+
+ if(key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
+ if(!ctx->cipher->init(ctx,key,iv,enc)) return 0;
+ }
+ if(enc != -1) ctx->encrypt=enc;
+ ctx->buf_len=0;
+ return 1;
+ }
+
+int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
+ unsigned char *in, int inl)
{
if (ctx->encrypt)
- EVP_EncryptUpdate(ctx,out,outl,in,inl);
- else EVP_DecryptUpdate(ctx,out,outl,in,inl);
+ return EVP_EncryptUpdate(ctx,out,outl,in,inl);
+ else return EVP_DecryptUpdate(ctx,out,outl,in,inl);
}
-int EVP_CipherFinal(ctx,out,outl)
-EVP_CIPHER_CTX *ctx;
-unsigned char *out;
-int *outl;
+int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
if (ctx->encrypt)
- {
- EVP_EncryptFinal(ctx,out,outl);
- return(1);
- }
+ return EVP_EncryptFinal(ctx,out,outl);
else return(EVP_DecryptFinal(ctx,out,outl));
}
-void EVP_EncryptInit(ctx,cipher,key,iv)
-EVP_CIPHER_CTX *ctx;
-EVP_CIPHER *cipher;
-unsigned char *key;
-unsigned char *iv;
+int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+ unsigned char *key, unsigned char *iv)
{
- if (cipher != NULL)
- ctx->cipher=cipher;
- ctx->cipher->init(ctx,key,iv,1);
- ctx->encrypt=1;
- ctx->buf_len=0;
+ return EVP_CipherInit(ctx, cipher, key, iv, 1);
}
-void EVP_DecryptInit(ctx,cipher,key,iv)
-EVP_CIPHER_CTX *ctx;
-EVP_CIPHER *cipher;
-unsigned char *key;
-unsigned char *iv;
+int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+ unsigned char *key, unsigned char *iv)
{
- if (cipher != NULL)
- ctx->cipher=cipher;
- ctx->cipher->init(ctx,key,iv,0);
- ctx->encrypt=0;
- ctx->buf_len=0;
+ return EVP_CipherInit(ctx, cipher, key, iv, 0);
}
-void EVP_EncryptUpdate(ctx,out,outl,in,inl)
-EVP_CIPHER_CTX *ctx;
-unsigned char *out;
-int *outl;
-unsigned char *in;
-int inl;
+int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
+ unsigned char *in, int inl)
{
int i,j,bl;
i=ctx->buf_len;
bl=ctx->cipher->block_size;
*outl=0;
- if ((inl == 0) && (i != bl)) return;
+ if ((inl == 0) && (i != bl)) return 1;
if (i != 0)
{
if (i+inl < bl)
{
memcpy(&(ctx->buf[i]),in,inl);
ctx->buf_len+=inl;
- return;
+ return 1;
}
else
{
j=bl-i;
if (j != 0) memcpy(&(ctx->buf[i]),in,j);
- ctx->cipher->do_cipher(ctx,out,ctx->buf,bl);
+ if(!ctx->cipher->do_cipher(ctx,out,ctx->buf,bl)) return 0;
inl-=j;
in+=j;
out+=bl;
inl-=i;
if (inl > 0)
{
- ctx->cipher->do_cipher(ctx,out,in,inl);
+ if(!ctx->cipher->do_cipher(ctx,out,in,inl)) return 0;
*outl+=inl;
}
if (i != 0)
memcpy(ctx->buf,&(in[inl]),i);
ctx->buf_len=i;
+ return 1;
}
-void EVP_EncryptFinal(ctx,out,outl)
-EVP_CIPHER_CTX *ctx;
-unsigned char *out;
-int *outl;
+int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
int i,n,b,bl;
if (b == 1)
{
*outl=0;
- return;
+ return 1;
}
bl=ctx->buf_len;
+ if (ctx->flags & EVP_CIPH_NO_PADDING)
+ {
+ if(bl)
+ {
+ EVPerr(EVP_F_EVP_ENCRYPTFINAL,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
+ return 0;
+ }
+ *outl = 0;
+ return 1;
+ }
n=b-bl;
for (i=bl; i<b; i++)
ctx->buf[i]=n;
- ctx->cipher->do_cipher(ctx,out,ctx->buf,b);
+ if(!ctx->cipher->do_cipher(ctx,out,ctx->buf,b)) return 0;
*outl=b;
+ return 1;
}
-void EVP_DecryptUpdate(ctx,out,outl,in,inl)
-EVP_CIPHER_CTX *ctx;
-unsigned char *out;
-int *outl;
-unsigned char *in;
-int inl;
+int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
+ unsigned char *in, int inl)
{
int b,bl,n;
int keep_last=0;
*outl=0;
- if (inl == 0) return;
+ if (inl == 0) return 1;
+
+ if (ctx->flags & EVP_CIPH_NO_PADDING)
+ return EVP_EncryptUpdate(ctx, out, outl, in, inl);
b=ctx->cipher->block_size;
if (b > 1)
memcpy(&(ctx->buf[bl]),in,inl);
ctx->buf_len=b;
*outl=0;
- return;
+ return 1;
}
keep_last=1;
inl-=b; /* don't do the last block */
}
}
- EVP_EncryptUpdate(ctx,out,outl,in,inl);
+ if(!EVP_EncryptUpdate(ctx,out,outl,in,inl)) return 0;
/* if we have 'decrypted' a multiple of block size, make sure
* we have a copy of this last block */
#endif
ctx->buf_len=b;
}
+ return 1;
}
-int EVP_DecryptFinal(ctx,out,outl)
-EVP_CIPHER_CTX *ctx;
-unsigned char *out;
-int *outl;
+int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
int i,b;
int n;
*outl=0;
b=ctx->cipher->block_size;
+ if (ctx->flags & EVP_CIPH_NO_PADDING)
+ {
+ if(ctx->buf_len)
+ {
+ EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
+ return 0;
+ }
+ *outl = 0;
+ return 1;
+ }
if (b > 1)
{
if (ctx->buf_len != b)
EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_WRONG_FINAL_BLOCK_LENGTH);
return(0);
}
- EVP_EncryptUpdate(ctx,ctx->buf,&n,ctx->buf,0);
+ if(!EVP_EncryptUpdate(ctx,ctx->buf,&n,ctx->buf,0)) return 0;
if (n != b)
return(0);
n=ctx->buf[b-1];
return(1);
}
-void EVP_CIPHER_CTX_cleanup(c)
-EVP_CIPHER_CTX *c;
+int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
{
if ((c->cipher != NULL) && (c->cipher->cleanup != NULL))
- c->cipher->cleanup(c);
+ {
+ if(!c->cipher->cleanup(c)) return 0;
+ }
memset(c,0,sizeof(EVP_CIPHER_CTX));
+ return 1;
+ }
+
+int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
+ {
+ if(c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
+ return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
+ if(c->key_len == keylen) return 1;
+ if((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH))
+ {
+ c->key_len = keylen;
+ return 1;
+ }
+ EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH,EVP_R_INVALID_KEY_LENGTH);
+ return 0;
+ }
+
+int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
+ {
+ if (pad) ctx->flags &= ~EVP_CIPH_NO_PADDING;
+ else ctx->flags |= EVP_CIPH_NO_PADDING;
+ return 1;
+ }
+
+int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
+{
+ int ret;
+ if(!ctx->cipher) {
+ EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
+ return 0;
}
+ if(!ctx->cipher->ctrl) {
+ EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
+ return 0;
+ }
+
+ ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
+ if(ret == -1) {
+ EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
+ return 0;
+ }
+ return ret;
+}
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