#include "cryptlib.h"
#include <openssl/evp.h>
#include <openssl/err.h>
+#include <openssl/rand.h>
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
#include "evp_locl.h"
-#include <assert.h>
+const char EVP_version[]="EVP" OPENSSL_VERSION_PTEXT;
-const char *EVP_version="EVP" OPENSSL_VERSION_PTEXT;
-
-void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx)
+EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
{
- memset(ctx,0,sizeof(EVP_CIPHER_CTX));
- /* ctx->cipher=NULL; */
+ EVP_CIPHER_CTX *ctx=OPENSSL_malloc(sizeof *ctx);
+ if (ctx)
+ EVP_CIPHER_CTX_init(ctx);
+ return ctx;
}
int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
const unsigned char *key, const unsigned char *iv, int enc)
{
- if(enc && (enc != -1)) enc = 1;
if (cipher)
- {
- ctx->cipher=cipher;
- ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
- 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;
- }
-
- /* we assume block size is a power of 2 in *cryptUpdate */
- assert(ctx->cipher->block_size == 1
- || ctx->cipher->block_size == 8
- || ctx->cipher->block_size == 16);
-
- 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;
- ctx->final_used=0;
- ctx->block_mask=ctx->cipher->block_size-1;
- return 1;
+ EVP_CIPHER_CTX_init(ctx);
+ return EVP_CipherInit_ex(ctx,cipher,NULL,key,iv,enc);
}
int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
else return EVP_DecryptUpdate(ctx,out,outl,in,inl);
}
+int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
+ {
+ if (ctx->encrypt)
+ return EVP_EncryptFinal_ex(ctx,out,outl);
+ else return EVP_DecryptFinal_ex(ctx,out,outl);
+ }
+
int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
if (ctx->encrypt)
return EVP_EncryptFinal(ctx,out,outl);
- else return(EVP_DecryptFinal(ctx,out,outl));
+ else return EVP_DecryptFinal(ctx,out,outl);
}
int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
return EVP_CipherInit(ctx, cipher, key, iv, 1);
}
+int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx,const EVP_CIPHER *cipher, ENGINE *impl,
+ const unsigned char *key, const unsigned char *iv)
+ {
+ return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
+ }
+
int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
const unsigned char *key, const unsigned char *iv)
{
return EVP_CipherInit(ctx, cipher, key, iv, 0);
}
+int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
+ const unsigned char *key, const unsigned char *iv)
+ {
+ return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
+ }
+
int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
int i,j,bl;
+ OPENSSL_assert(inl > 0);
if(ctx->buf_len == 0 && (inl&(ctx->block_mask)) == 0)
{
if(ctx->cipher->do_cipher(ctx,out,in,inl))
}
i=ctx->buf_len;
bl=ctx->cipher->block_size;
+ OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
if (i != 0)
{
if (i+inl < bl)
int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
- int i,n,b,bl,ret;
+ int ret;
+ ret = EVP_EncryptFinal_ex(ctx, out, outl);
+ return ret;
+ }
+
+int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
+ {
+ int n,ret;
+ unsigned int i, b, bl;
b=ctx->cipher->block_size;
+ OPENSSL_assert(b <= sizeof ctx->buf);
if (b == 1)
{
*outl=0;
bl=ctx->buf_len;
if (ctx->flags & EVP_CIPH_NO_PADDING)
{
- EVP_CIPHER_CTX_cleanup(ctx);
if(bl)
{
- EVPerr(EVP_F_EVP_ENCRYPTFINAL,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
+ EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
return 0;
}
*outl = 0;
ctx->buf[i]=n;
ret=ctx->cipher->do_cipher(ctx,out,ctx->buf,b);
- EVP_CIPHER_CTX_cleanup(ctx);
if(ret)
*outl=b;
int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
- int b;
+ int fix_len;
+ unsigned int b;
if (inl == 0)
{
return EVP_EncryptUpdate(ctx, out, outl, in, inl);
b=ctx->cipher->block_size;
+ OPENSSL_assert(b <= sizeof ctx->final);
+
if(ctx->final_used)
{
memcpy(out,ctx->final,b);
out+=b;
+ fix_len = 1;
}
-
+ else
+ fix_len = 0;
+
+
if(!EVP_EncryptUpdate(ctx,out,outl,in,inl))
return 0;
* we have a copy of this last block */
if (b > 1 && !ctx->buf_len)
{
- if(!ctx->final_used)
- {
- *outl-=b;
- ctx->final_used=1;
- }
+ *outl-=b;
+ ctx->final_used=1;
memcpy(ctx->final,&out[*outl],b);
}
- else if(ctx->final_used)
- {
- ctx->final_used=0;
- *outl+=b;
- }
+ else
+ ctx->final_used = 0;
+
+ if (fix_len)
+ *outl += b;
+
return 1;
}
int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
- int i,b;
- int n;
+ int ret;
+ ret = EVP_DecryptFinal_ex(ctx, out, outl);
+ return ret;
+ }
+
+int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
+ {
+ int i,n;
+ unsigned int b;
*outl=0;
b=ctx->cipher->block_size;
{
if(ctx->buf_len)
{
- EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
+ EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
return 0;
}
*outl = 0;
{
if (ctx->buf_len || !ctx->final_used)
{
- EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_WRONG_FINAL_BLOCK_LENGTH);
+ EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,EVP_R_WRONG_FINAL_BLOCK_LENGTH);
return(0);
}
+ OPENSSL_assert(b <= sizeof ctx->final);
n=ctx->final[b-1];
- if (n > b)
+ if (n == 0 || n > (int)b)
{
- EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_BAD_DECRYPT);
+ EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,EVP_R_BAD_DECRYPT);
return(0);
}
for (i=0; i<n; i++)
{
if (ctx->final[--b] != n)
{
- EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_BAD_DECRYPT);
+ EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,EVP_R_BAD_DECRYPT);
return(0);
}
}
return(1);
}
-int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
+void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
{
- if ((c->cipher != NULL) && (c->cipher->cleanup != NULL))
+ if (ctx)
{
- if(!c->cipher->cleanup(c)) return 0;
+ EVP_CIPHER_CTX_cleanup(ctx);
+ OPENSSL_free(ctx);
}
- OPENSSL_free(c->cipher_data);
- memset(c,0,sizeof(EVP_CIPHER_CTX));
- return 1;
}
int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
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);
+int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
+ {
+ if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
+ return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
+ if (RAND_bytes(key, ctx->key_len) <= 0)
return 0;
+ return 1;
}
- if(!ctx->cipher->ctrl) {
- EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
- return 0;
+#ifndef OPENSSL_NO_ENGINE
+
+#ifdef OPENSSL_FIPS
+
+static int do_evp_enc_engine_full(EVP_CIPHER_CTX *ctx, const EVP_CIPHER **pcipher, ENGINE *impl)
+ {
+ if(impl)
+ {
+ if (!ENGINE_init(impl))
+ {
+ EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
+ return 0;
+ }
+ }
+ else
+ /* Ask if an ENGINE is reserved for this job */
+ impl = ENGINE_get_cipher_engine((*pcipher)->nid);
+ if(impl)
+ {
+ /* There's an ENGINE for this job ... (apparently) */
+ const EVP_CIPHER *c = ENGINE_get_cipher(impl, (*pcipher)->nid);
+ if(!c)
+ {
+ /* One positive side-effect of US's export
+ * control history, is that we should at least
+ * be able to avoid using US mispellings of
+ * "initialisation"? */
+ EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
+ return 0;
+ }
+ /* We'll use the ENGINE's private cipher definition */
+ *pcipher = c;
+ /* Store the ENGINE functional reference so we know
+ * 'cipher' came from an ENGINE and we need to release
+ * it when done. */
+ ctx->engine = impl;
+ }
+ else
+ ctx->engine = NULL;
+ return 1;
}
- 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;
+void int_EVP_CIPHER_init_engine_callbacks(void)
+ {
+ int_EVP_CIPHER_set_engine_callbacks(
+ ENGINE_finish, do_evp_enc_engine_full);
}
- return ret;
-}
+
+#endif
+
+#endif
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