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Diffstat (limited to 'openssl-1.1.0h/crypto/evp/bio_b64.c')
-rw-r--r--openssl-1.1.0h/crypto/evp/bio_b64.c551
1 files changed, 551 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/evp/bio_b64.c b/openssl-1.1.0h/crypto/evp/bio_b64.c
new file mode 100644
index 0000000..a86e8db
--- /dev/null
+++ b/openssl-1.1.0h/crypto/evp/bio_b64.c
@@ -0,0 +1,551 @@
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include "internal/cryptlib.h"
+#include <openssl/buffer.h>
+#include <openssl/evp.h>
+#include "internal/bio.h"
+
+static int b64_write(BIO *h, const char *buf, int num);
+static int b64_read(BIO *h, char *buf, int size);
+static int b64_puts(BIO *h, const char *str);
+/*
+ * static int b64_gets(BIO *h, char *str, int size);
+ */
+static long b64_ctrl(BIO *h, int cmd, long arg1, void *arg2);
+static int b64_new(BIO *h);
+static int b64_free(BIO *data);
+static long b64_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp);
+#define B64_BLOCK_SIZE 1024
+#define B64_BLOCK_SIZE2 768
+#define B64_NONE 0
+#define B64_ENCODE 1
+#define B64_DECODE 2
+
+typedef struct b64_struct {
+ /*
+ * BIO *bio; moved to the BIO structure
+ */
+ int buf_len;
+ int buf_off;
+ int tmp_len; /* used to find the start when decoding */
+ int tmp_nl; /* If true, scan until '\n' */
+ int encode;
+ int start; /* have we started decoding yet? */
+ int cont; /* <= 0 when finished */
+ EVP_ENCODE_CTX *base64;
+ char buf[EVP_ENCODE_LENGTH(B64_BLOCK_SIZE) + 10];
+ char tmp[B64_BLOCK_SIZE];
+} BIO_B64_CTX;
+
+static const BIO_METHOD methods_b64 = {
+ BIO_TYPE_BASE64,
+ "base64 encoding",
+ b64_write,
+ b64_read,
+ b64_puts,
+ NULL, /* b64_gets, */
+ b64_ctrl,
+ b64_new,
+ b64_free,
+ b64_callback_ctrl,
+};
+
+
+const BIO_METHOD *BIO_f_base64(void)
+{
+ return &methods_b64;
+}
+
+static int b64_new(BIO *bi)
+{
+ BIO_B64_CTX *ctx;
+
+ ctx = OPENSSL_zalloc(sizeof(*ctx));
+ if (ctx == NULL)
+ return 0;
+
+ ctx->cont = 1;
+ ctx->start = 1;
+ ctx->base64 = EVP_ENCODE_CTX_new();
+ if (ctx->base64 == NULL) {
+ OPENSSL_free(ctx);
+ return 0;
+ }
+
+ BIO_set_data(bi, ctx);
+ BIO_set_init(bi, 1);
+
+ return 1;
+}
+
+static int b64_free(BIO *a)
+{
+ BIO_B64_CTX *ctx;
+ if (a == NULL)
+ return 0;
+
+ ctx = BIO_get_data(a);
+ if (ctx == NULL)
+ return 0;
+
+ EVP_ENCODE_CTX_free(ctx->base64);
+ OPENSSL_free(ctx);
+ BIO_set_data(a, NULL);
+ BIO_set_init(a, 0);
+
+ return 1;
+}
+
+static int b64_read(BIO *b, char *out, int outl)
+{
+ int ret = 0, i, ii, j, k, x, n, num, ret_code = 0;
+ BIO_B64_CTX *ctx;
+ unsigned char *p, *q;
+ BIO *next;
+
+ if (out == NULL)
+ return (0);
+ ctx = (BIO_B64_CTX *)BIO_get_data(b);
+
+ next = BIO_next(b);
+ if ((ctx == NULL) || (next == NULL))
+ return 0;
+
+ BIO_clear_retry_flags(b);
+
+ if (ctx->encode != B64_DECODE) {
+ ctx->encode = B64_DECODE;
+ ctx->buf_len = 0;
+ ctx->buf_off = 0;
+ ctx->tmp_len = 0;
+ EVP_DecodeInit(ctx->base64);
+ }
+
+ /* First check if there are bytes decoded/encoded */
+ if (ctx->buf_len > 0) {
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ i = ctx->buf_len - ctx->buf_off;
+ if (i > outl)
+ i = outl;
+ OPENSSL_assert(ctx->buf_off + i < (int)sizeof(ctx->buf));
+ memcpy(out, &(ctx->buf[ctx->buf_off]), i);
+ ret = i;
+ out += i;
+ outl -= i;
+ ctx->buf_off += i;
+ if (ctx->buf_len == ctx->buf_off) {
+ ctx->buf_len = 0;
+ ctx->buf_off = 0;
+ }
+ }
+
+ /*
+ * At this point, we have room of outl bytes and an empty buffer, so we
+ * should read in some more.
+ */
+
+ ret_code = 0;
+ while (outl > 0) {
+ if (ctx->cont <= 0)
+ break;
+
+ i = BIO_read(next, &(ctx->tmp[ctx->tmp_len]),
+ B64_BLOCK_SIZE - ctx->tmp_len);
+
+ if (i <= 0) {
+ ret_code = i;
+
+ /* Should we continue next time we are called? */
+ if (!BIO_should_retry(next)) {
+ ctx->cont = i;
+ /* If buffer empty break */
+ if (ctx->tmp_len == 0)
+ break;
+ /* Fall through and process what we have */
+ else
+ i = 0;
+ }
+ /* else we retry and add more data to buffer */
+ else
+ break;
+ }
+ i += ctx->tmp_len;
+ ctx->tmp_len = i;
+
+ /*
+ * We need to scan, a line at a time until we have a valid line if we
+ * are starting.
+ */
+ if (ctx->start && (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)) {
+ /* ctx->start=1; */
+ ctx->tmp_len = 0;
+ } else if (ctx->start) {
+ q = p = (unsigned char *)ctx->tmp;
+ num = 0;
+ for (j = 0; j < i; j++) {
+ if (*(q++) != '\n')
+ continue;
+
+ /*
+ * due to a previous very long line, we need to keep on
+ * scanning for a '\n' before we even start looking for
+ * base64 encoded stuff.
+ */
+ if (ctx->tmp_nl) {
+ p = q;
+ ctx->tmp_nl = 0;
+ continue;
+ }
+
+ k = EVP_DecodeUpdate(ctx->base64,
+ (unsigned char *)ctx->buf,
+ &num, p, q - p);
+ if ((k <= 0) && (num == 0) && (ctx->start))
+ EVP_DecodeInit(ctx->base64);
+ else {
+ if (p != (unsigned char *)
+ &(ctx->tmp[0])) {
+ i -= (p - (unsigned char *)
+ &(ctx->tmp[0]));
+ for (x = 0; x < i; x++)
+ ctx->tmp[x] = p[x];
+ }
+ EVP_DecodeInit(ctx->base64);
+ ctx->start = 0;
+ break;
+ }
+ p = q;
+ }
+
+ /* we fell off the end without starting */
+ if ((j == i) && (num == 0)) {
+ /*
+ * Is this is one long chunk?, if so, keep on reading until a
+ * new line.
+ */
+ if (p == (unsigned char *)&(ctx->tmp[0])) {
+ /* Check buffer full */
+ if (i == B64_BLOCK_SIZE) {
+ ctx->tmp_nl = 1;
+ ctx->tmp_len = 0;
+ }
+ } else if (p != q) { /* finished on a '\n' */
+ n = q - p;
+ for (ii = 0; ii < n; ii++)
+ ctx->tmp[ii] = p[ii];
+ ctx->tmp_len = n;
+ }
+ /* else finished on a '\n' */
+ continue;
+ } else {
+ ctx->tmp_len = 0;
+ }
+ } else if ((i < B64_BLOCK_SIZE) && (ctx->cont > 0)) {
+ /*
+ * If buffer isn't full and we can retry then restart to read in
+ * more data.
+ */
+ continue;
+ }
+
+ if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) {
+ int z, jj;
+
+ jj = i & ~3; /* process per 4 */
+ z = EVP_DecodeBlock((unsigned char *)ctx->buf,
+ (unsigned char *)ctx->tmp, jj);
+ if (jj > 2) {
+ if (ctx->tmp[jj - 1] == '=') {
+ z--;
+ if (ctx->tmp[jj - 2] == '=')
+ z--;
+ }
+ }
+ /*
+ * z is now number of output bytes and jj is the number consumed
+ */
+ if (jj != i) {
+ memmove(ctx->tmp, &ctx->tmp[jj], i - jj);
+ ctx->tmp_len = i - jj;
+ }
+ ctx->buf_len = 0;
+ if (z > 0) {
+ ctx->buf_len = z;
+ }
+ i = z;
+ } else {
+ i = EVP_DecodeUpdate(ctx->base64,
+ (unsigned char *)ctx->buf, &ctx->buf_len,
+ (unsigned char *)ctx->tmp, i);
+ ctx->tmp_len = 0;
+ }
+ /*
+ * If eof or an error was signalled, then the condition
+ * 'ctx->cont <= 0' will prevent b64_read() from reading
+ * more data on subsequent calls. This assignment was
+ * deleted accidentally in commit 5562cfaca4f3.
+ */
+ ctx->cont = i;
+
+ ctx->buf_off = 0;
+ if (i < 0) {
+ ret_code = 0;
+ ctx->buf_len = 0;
+ break;
+ }
+
+ if (ctx->buf_len <= outl)
+ i = ctx->buf_len;
+ else
+ i = outl;
+
+ memcpy(out, ctx->buf, i);
+ ret += i;
+ ctx->buf_off = i;
+ if (ctx->buf_off == ctx->buf_len) {
+ ctx->buf_len = 0;
+ ctx->buf_off = 0;
+ }
+ outl -= i;
+ out += i;
+ }
+ /* BIO_clear_retry_flags(b); */
+ BIO_copy_next_retry(b);
+ return ((ret == 0) ? ret_code : ret);
+}
+
+static int b64_write(BIO *b, const char *in, int inl)
+{
+ int ret = 0;
+ int n;
+ int i;
+ BIO_B64_CTX *ctx;
+ BIO *next;
+
+ ctx = (BIO_B64_CTX *)BIO_get_data(b);
+ next = BIO_next(b);
+ if ((ctx == NULL) || (next == NULL))
+ return 0;
+
+ BIO_clear_retry_flags(b);
+
+ if (ctx->encode != B64_ENCODE) {
+ ctx->encode = B64_ENCODE;
+ ctx->buf_len = 0;
+ ctx->buf_off = 0;
+ ctx->tmp_len = 0;
+ EVP_EncodeInit(ctx->base64);
+ }
+
+ OPENSSL_assert(ctx->buf_off < (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ n = ctx->buf_len - ctx->buf_off;
+ while (n > 0) {
+ i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n);
+ if (i <= 0) {
+ BIO_copy_next_retry(b);
+ return (i);
+ }
+ OPENSSL_assert(i <= n);
+ ctx->buf_off += i;
+ OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ n -= i;
+ }
+ /* at this point all pending data has been written */
+ ctx->buf_off = 0;
+ ctx->buf_len = 0;
+
+ if ((in == NULL) || (inl <= 0))
+ return (0);
+
+ while (inl > 0) {
+ n = (inl > B64_BLOCK_SIZE) ? B64_BLOCK_SIZE : inl;
+
+ if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) {
+ if (ctx->tmp_len > 0) {
+ OPENSSL_assert(ctx->tmp_len <= 3);
+ n = 3 - ctx->tmp_len;
+ /*
+ * There's a theoretical possibility for this
+ */
+ if (n > inl)
+ n = inl;
+ memcpy(&(ctx->tmp[ctx->tmp_len]), in, n);
+ ctx->tmp_len += n;
+ ret += n;
+ if (ctx->tmp_len < 3)
+ break;
+ ctx->buf_len =
+ EVP_EncodeBlock((unsigned char *)ctx->buf,
+ (unsigned char *)ctx->tmp, ctx->tmp_len);
+ OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ /*
+ * Since we're now done using the temporary buffer, the
+ * length should be 0'd
+ */
+ ctx->tmp_len = 0;
+ } else {
+ if (n < 3) {
+ memcpy(ctx->tmp, in, n);
+ ctx->tmp_len = n;
+ ret += n;
+ break;
+ }
+ n -= n % 3;
+ ctx->buf_len =
+ EVP_EncodeBlock((unsigned char *)ctx->buf,
+ (const unsigned char *)in, n);
+ OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ ret += n;
+ }
+ } else {
+ if (!EVP_EncodeUpdate(ctx->base64,
+ (unsigned char *)ctx->buf, &ctx->buf_len,
+ (unsigned char *)in, n))
+ return ((ret == 0) ? -1 : ret);
+ OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ ret += n;
+ }
+ inl -= n;
+ in += n;
+
+ ctx->buf_off = 0;
+ n = ctx->buf_len;
+ while (n > 0) {
+ i = BIO_write(next, &(ctx->buf[ctx->buf_off]), n);
+ if (i <= 0) {
+ BIO_copy_next_retry(b);
+ return ((ret == 0) ? i : ret);
+ }
+ OPENSSL_assert(i <= n);
+ n -= i;
+ ctx->buf_off += i;
+ OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf));
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ }
+ ctx->buf_len = 0;
+ ctx->buf_off = 0;
+ }
+ return (ret);
+}
+
+static long b64_ctrl(BIO *b, int cmd, long num, void *ptr)
+{
+ BIO_B64_CTX *ctx;
+ long ret = 1;
+ int i;
+ BIO *next;
+
+ ctx = (BIO_B64_CTX *)BIO_get_data(b);
+ next = BIO_next(b);
+ if ((ctx == NULL) || (next == NULL))
+ return 0;
+
+ switch (cmd) {
+ case BIO_CTRL_RESET:
+ ctx->cont = 1;
+ ctx->start = 1;
+ ctx->encode = B64_NONE;
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+ case BIO_CTRL_EOF: /* More to read */
+ if (ctx->cont <= 0)
+ ret = 1;
+ else
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+ case BIO_CTRL_WPENDING: /* More to write in buffer */
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ ret = ctx->buf_len - ctx->buf_off;
+ if ((ret == 0) && (ctx->encode != B64_NONE)
+ && (EVP_ENCODE_CTX_num(ctx->base64) != 0))
+ ret = 1;
+ else if (ret <= 0)
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+ case BIO_CTRL_PENDING: /* More to read in buffer */
+ OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
+ ret = ctx->buf_len - ctx->buf_off;
+ if (ret <= 0)
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+ case BIO_CTRL_FLUSH:
+ /* do a final write */
+ again:
+ while (ctx->buf_len != ctx->buf_off) {
+ i = b64_write(b, NULL, 0);
+ if (i < 0)
+ return i;
+ }
+ if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) {
+ if (ctx->tmp_len != 0) {
+ ctx->buf_len = EVP_EncodeBlock((unsigned char *)ctx->buf,
+ (unsigned char *)ctx->tmp,
+ ctx->tmp_len);
+ ctx->buf_off = 0;
+ ctx->tmp_len = 0;
+ goto again;
+ }
+ } else if (ctx->encode != B64_NONE
+ && EVP_ENCODE_CTX_num(ctx->base64) != 0) {
+ ctx->buf_off = 0;
+ EVP_EncodeFinal(ctx->base64,
+ (unsigned char *)ctx->buf, &(ctx->buf_len));
+ /* push out the bytes */
+ goto again;
+ }
+ /* Finally flush the underlying BIO */
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+
+ case BIO_C_DO_STATE_MACHINE:
+ BIO_clear_retry_flags(b);
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ BIO_copy_next_retry(b);
+ break;
+
+ case BIO_CTRL_DUP:
+ break;
+ case BIO_CTRL_INFO:
+ case BIO_CTRL_GET:
+ case BIO_CTRL_SET:
+ default:
+ ret = BIO_ctrl(next, cmd, num, ptr);
+ break;
+ }
+ return ret;
+}
+
+static long b64_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
+{
+ long ret = 1;
+ BIO *next = BIO_next(b);
+
+ if (next == NULL)
+ return 0;
+ switch (cmd) {
+ default:
+ ret = BIO_callback_ctrl(next, cmd, fp);
+ break;
+ }
+ return (ret);
+}
+
+static int b64_puts(BIO *b, const char *str)
+{
+ return b64_write(b, str, strlen(str));
+}
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