#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)
{
/* ctx->cipher=NULL; */
}
+EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
+ {
+ 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,
- unsigned char *key, unsigned char *iv, int enc)
+ const unsigned char *key, const unsigned char *iv, int enc)
+ {
+ if (cipher)
+ EVP_CIPHER_CTX_init(ctx);
+ return EVP_CipherInit_ex(ctx,cipher,NULL,key,iv,enc);
+ }
+
+int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
+ const unsigned char *key, const unsigned char *iv, int enc)
{
- if(enc && (enc != -1)) enc = 1;
+ if (enc == -1)
+ enc = ctx->encrypt;
+ else
+ {
+ if (enc)
+ enc = 1;
+ ctx->encrypt = enc;
+ }
+#ifndef OPENSSL_NO_ENGINE
+ /* Whether it's nice or not, "Inits" can be used on "Final"'d contexts
+ * so this context may already have an ENGINE! Try to avoid releasing
+ * the previous handle, re-querying for an ENGINE, and having a
+ * reinitialisation, when it may all be unecessary. */
+ if (ctx->engine && ctx->cipher && (!cipher ||
+ (cipher && (cipher->nid == ctx->cipher->nid))))
+ goto skip_to_init;
+#endif
if (cipher)
{
+ /* Ensure a context left lying around from last time is cleared
+ * (the previous check attempted to avoid this if the same
+ * ENGINE and EVP_CIPHER could be used). */
+ EVP_CIPHER_CTX_cleanup(ctx);
+
+ /* Restore encrypt field: it is zeroed by cleanup */
+ ctx->encrypt = enc;
+#ifndef OPENSSL_NO_ENGINE
+ 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(cipher->nid);
+ if(impl)
+ {
+ /* There's an ENGINE for this job ... (apparently) */
+ const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->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 */
+ cipher = 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;
+#endif
+
ctx->cipher=cipher;
- ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
+ if (ctx->cipher->ctx_size)
+ {
+ ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
+ if (!ctx->cipher_data)
+ {
+ EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ }
+ else
+ {
+ ctx->cipher_data = NULL;
+ }
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);
+ if(ctx->cipher->flags & EVP_CIPH_CTRL_INIT)
+ {
+ if(!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL))
+ {
+ EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
return 0;
+ }
}
}
- } else if(!ctx->cipher) {
- EVPerr(EVP_F_EVP_CIPHERINIT, EVP_R_NO_CIPHER_SET);
+ else if(!ctx->cipher)
+ {
+ EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET);
return 0;
- }
-
+ }
+#ifndef OPENSSL_NO_ENGINE
+skip_to_init:
+#endif
/* 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);
+ OPENSSL_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)) {
ctx->num = 0;
case EVP_CIPH_CBC_MODE:
+ case EVP_CIPH_CTR_MODE:
+ OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <=
+ (int)sizeof(ctx->iv));
if(iv) memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
- memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
+ /* Don't reuse IV for CTR mode */
+ if (EVP_CIPHER_CTX_mode(ctx) != EVP_CIPH_CTR_MODE)
+ memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
break;
default:
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;
}
int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
- unsigned char *in, int inl)
+ const unsigned char *in, int inl)
{
if (ctx->encrypt)
return EVP_EncryptUpdate(ctx,out,outl,in,inl);
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,
- unsigned char *key, unsigned char *iv)
+ const unsigned char *key, const unsigned char *iv)
{
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,
- unsigned char *key, unsigned char *iv)
+ 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,
- unsigned char *in, int inl)
+ const unsigned char *in, int inl)
{
int i,j,bl;
+ if (inl <= 0)
+ {
+ *outl = 0;
+ return 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,
- unsigned char *in, int inl)
+ const unsigned char *in, int inl)
{
- int b;
+ int fix_len;
+ unsigned int b;
- if (inl == 0)
+ if (inl <= 0)
{
- *outl=0;
- return 1;
+ *outl = 0;
+ return inl == 0;
}
if (ctx->flags & EVP_CIPH_NO_PADDING)
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);
}
+void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
+ {
+ if (ctx)
+ {
+ EVP_CIPHER_CTX_cleanup(ctx);
+ OPENSSL_free(ctx);
+ }
+ }
+
int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
{
- if ((c->cipher != NULL) && (c->cipher->cleanup != NULL))
+ if (c->cipher != NULL)
{
- if(!c->cipher->cleanup(c)) return 0;
+ if(c->cipher->cleanup && !c->cipher->cleanup(c))
+ return 0;
+ /* Cleanse cipher context data */
+ if (c->cipher_data)
+ OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size);
}
- OPENSSL_free(c->cipher_data);
+ if (c->cipher_data)
+ OPENSSL_free(c->cipher_data);
+#ifndef OPENSSL_NO_ENGINE
+ if (c->engine)
+ /* The EVP_CIPHER we used belongs to an ENGINE, release the
+ * functional reference we held for this reason. */
+ ENGINE_finish(c->engine);
+#endif
memset(c,0,sizeof(EVP_CIPHER_CTX));
return 1;
}
}
return ret;
}
+
+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;
+ }
+
+int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
+ {
+ if ((in == NULL) || (in->cipher == NULL))
+ {
+ EVPerr(EVP_F_EVP_CIPHER_CTX_COPY,EVP_R_INPUT_NOT_INITIALIZED);
+ return 0;
+ }
+#ifndef OPENSSL_NO_ENGINE
+ /* Make sure it's safe to copy a cipher context using an ENGINE */
+ if (in->engine && !ENGINE_init(in->engine))
+ {
+ EVPerr(EVP_F_EVP_CIPHER_CTX_COPY,ERR_R_ENGINE_LIB);
+ return 0;
+ }
+#endif
+
+ EVP_CIPHER_CTX_cleanup(out);
+ memcpy(out,in,sizeof *out);
+
+ if (in->cipher_data && in->cipher->ctx_size)
+ {
+ out->cipher_data=OPENSSL_malloc(in->cipher->ctx_size);
+ if (!out->cipher_data)
+ {
+ EVPerr(EVP_F_EVP_CIPHER_CTX_COPY,ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ memcpy(out->cipher_data,in->cipher_data,in->cipher->ctx_size);
+ }
+
+ if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
+ return in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out);
+ return 1;
+ }
+
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