-#include "cryptlib.h"
-#include "evp.h"
-
-char *EVP_version="EVP part of SSLeay 0.9.1c 22-Dec-1998";
-
-void EVP_CIPHER_CTX_init(ctx)
-EVP_CIPHER_CTX *ctx;
- {
- memset(ctx,0,sizeof(EVP_CIPHER_CTX));
- /* ctx->cipher=NULL; */
- }
-
-void EVP_CipherInit(ctx,data,key,iv,enc)
-EVP_CIPHER_CTX *ctx;
-EVP_CIPHER *data;
-unsigned char *key;
-unsigned char *iv;
-int enc;
- {
- if (enc)
- EVP_EncryptInit(ctx,data,key,iv);
- else
- EVP_DecryptInit(ctx,data,key,iv);
- }
-
-void EVP_CipherUpdate(ctx,out,outl,in,inl)
-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);
- }
-
-int EVP_CipherFinal(ctx,out,outl)
-EVP_CIPHER_CTX *ctx;
-unsigned char *out;
-int *outl;
- {
- if (ctx->encrypt)
- {
- EVP_EncryptFinal(ctx,out,outl);
- return(1);
- }
- 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;
- {
- if (cipher != NULL)
- ctx->cipher=cipher;
- ctx->cipher->init(ctx,key,iv,1);
- ctx->encrypt=1;
- ctx->buf_len=0;
- }
-
-void EVP_DecryptInit(ctx,cipher,key,iv)
-EVP_CIPHER_CTX *ctx;
-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;
- }
-
-
-void EVP_EncryptUpdate(ctx,out,outl,in,inl)
-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 (i != 0)
- {
- if (i+inl < bl)
- {
- memcpy(&(ctx->buf[i]),in,inl);
- ctx->buf_len+=inl;
- return;
- }
- else
- {
- j=bl-i;
- if (j != 0) memcpy(&(ctx->buf[i]),in,j);
- ctx->cipher->do_cipher(ctx,out,ctx->buf,bl);
- inl-=j;
- in+=j;
- out+=bl;
- *outl+=bl;
- }
- }
- i=inl%bl; /* how much is left */
- inl-=i;
- if (inl > 0)
- {
- ctx->cipher->do_cipher(ctx,out,in,inl);
- *outl+=inl;
- }
-
- if (i != 0)
- memcpy(ctx->buf,&(in[inl]),i);
- ctx->buf_len=i;
- }
-
-void EVP_EncryptFinal(ctx,out,outl)
-EVP_CIPHER_CTX *ctx;
-unsigned char *out;
-int *outl;
- {
- int i,n,b,bl;
-
- b=ctx->cipher->block_size;
- if (b == 1)
- {
- *outl=0;
- return;
- }
- bl=ctx->buf_len;
- n=b-bl;
- for (i=bl; i<b; i++)
- ctx->buf[i]=n;
- ctx->cipher->do_cipher(ctx,out,ctx->buf,b);
- *outl=b;
- }
-
-void EVP_DecryptUpdate(ctx,out,outl,in,inl)
-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;
-
- b=ctx->cipher->block_size;
- if (b > 1)
- {
- /* Is the input a multiple of the block size? */
- bl=ctx->buf_len;
- n=inl+bl;
- if (n%b == 0)
- {
- if (inl < b) /* must be 'just one' buff */
- {
- memcpy(&(ctx->buf[bl]),in,inl);
- ctx->buf_len=b;
- *outl=0;
- return;
- }
- keep_last=1;
- inl-=b; /* don't do the last block */
- }
- }
- EVP_EncryptUpdate(ctx,out,outl,in,inl);
-
- /* if we have 'decrypted' a multiple of block size, make sure
- * we have a copy of this last block */
- if (keep_last)
- {
- memcpy(&(ctx->buf[0]),&(in[inl]),b);
-#ifdef DEBUG
- if (ctx->buf_len != 0)
- {
- abort();
- }
+#include "internal/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"
+
+void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx)
+{
+ memset(ctx, 0, sizeof(*ctx));
+}
+
+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,
+ 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 == -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).
+ */
+ if (ctx->cipher) {
+ unsigned long flags = ctx->flags;
+ EVP_CIPHER_CTX_cleanup(ctx);
+ /* Restore encrypt and flags */
+ ctx->encrypt = enc;
+ ctx->flags = flags;
+ }
+#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;
+ if (ctx->cipher->ctx_size) {
+ ctx->cipher_data = OPENSSL_zalloc(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;
+ /* Preserve wrap enable flag, zero everything else */
+ ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
+ 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_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 */
+ OPENSSL_assert(ctx->cipher->block_size == 1
+ || ctx->cipher->block_size == 8
+ || ctx->cipher->block_size == 16);
+
+ if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
+ && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) {
+ EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED);
+ 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;
+ /* fall-through */
+
+ case EVP_CIPH_CBC_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));
+ break;
+
+ case EVP_CIPH_CTR_MODE:
+ ctx->num = 0;
+ /* Don't reuse IV for CTR mode */
+ if (iv)
+ memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx));
+ break;
+
+ default:
+ return 0;
+ }
+ }
+
+ if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
+ if (!ctx->cipher->init(ctx, key, iv, enc))
+ return 0;
+ }
+ ctx->buf_len = 0;
+ ctx->final_used = 0;
+ ctx->block_mask = ctx->cipher->block_size - 1;
+ return 1;
+}
+
+int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
+ 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);
+}
+
+int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+ 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,
+ 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;
+
+ if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
+ i = ctx->cipher->do_cipher(ctx, out, in, inl);
+ if (i < 0)
+ return 0;
+ else
+ *outl = i;
+ return 1;
+ }
+
+ 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)) {
+ *outl = inl;
+ return 1;
+ } else {
+ *outl = 0;
+ return 0;
+ }
+ }
+ i = ctx->buf_len;
+ bl = ctx->cipher->block_size;
+ OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
+ if (i != 0) {
+ if (i + inl < bl) {
+ memcpy(&(ctx->buf[i]), in, inl);
+ ctx->buf_len += inl;
+ *outl = 0;
+ return 1;
+ } else {
+ j = bl - i;
+ memcpy(&(ctx->buf[i]), in, j);
+ if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
+ return 0;
+ inl -= j;
+ in += j;
+ out += bl;
+ *outl = bl;
+ }
+ } else
+ *outl = 0;
+ i = inl & (bl - 1);
+ inl -= i;
+ if (inl > 0) {
+ 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;
+}
+
+int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
+{
+ 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;
+
+ if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
+ ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
+ if (ret < 0)
+ return 0;
+ else
+ *outl = ret;
+ return 1;
+ }
+
+ b = ctx->cipher->block_size;
+ OPENSSL_assert(b <= sizeof ctx->buf);
+ if (b == 1) {
+ *outl = 0;
+ return 1;
+ }
+ bl = ctx->buf_len;
+ if (ctx->flags & EVP_CIPH_NO_PADDING) {
+ if (bl) {
+ EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX,
+ 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;
+ ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
+
+ if (ret)
+ *outl = b;
+
+ return ret;
+}
+
+int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
+ const unsigned char *in, int inl)
+{
+ int fix_len;
+ unsigned int b;
+
+ if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
+ fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
+ if (fix_len < 0) {
+ *outl = 0;
+ return 0;
+ } else
+ *outl = fix_len;
+ return 1;
+ }
+
+ if (inl <= 0) {
+ *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;
+
+ /*
+ * if we have 'decrypted' a multiple of block size, make sure we have a
+ * copy of this last block
+ */
+ if (b > 1 && !ctx->buf_len) {
+ *outl -= b;
+ ctx->final_used = 1;
+ memcpy(ctx->final, &out[*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 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;
+
+ if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
+ i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
+ if (i < 0)
+ return 0;
+ else
+ *outl = i;
+ return 1;
+ }
+
+ b = ctx->cipher->block_size;
+ if (ctx->flags & EVP_CIPH_NO_PADDING) {
+ if (ctx->buf_len) {
+ EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,
+ EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
+ return 0;
+ }
+ *outl = 0;
+ return 1;
+ }
+ if (b > 1) {
+ if (ctx->buf_len || !ctx->final_used) {
+ EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
+ return (0);
+ }
+ OPENSSL_assert(b <= sizeof ctx->final);
+
+ /*
+ * The following assumes that the ciphertext has been authenticated.
+ * Otherwise it provides a padding oracle.
+ */
+ n = ctx->final[b - 1];
+ if (n == 0 || n > (int)b) {
+ 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_EX, EVP_R_BAD_DECRYPT);
+ return (0);
+ }
+ }
+ n = ctx->cipher->block_size - n;
+ for (i = 0; i < n; i++)
+ out[i] = ctx->final[i];
+ *outl = n;
+ } else
+ *outl = 0;
+ return (1);
+}
+
+void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
+{
+ EVP_CIPHER_CTX_cleanup(ctx);
+ OPENSSL_free(ctx);
+}
+
+int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
+{
+ if (!c)
+ return 0;
+ if (c->cipher != NULL) {
+ 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);
+#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);