From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>
Date: Fri, 30 Apr 2021 00:33:56 +0200
Subject: initial/final commit

---
 openssl-1.1.0h/crypto/evp/bio_b64.c | 551 ++++++++++++++++++++++++++++++++++++
 1 file changed, 551 insertions(+)
 create mode 100644 openssl-1.1.0h/crypto/evp/bio_b64.c

(limited to 'openssl-1.1.0h/crypto/evp/bio_b64.c')

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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